Flow control valve for hydraulic adjustable dampers

FIELD: transport.

SUBSTANCE: hydraulic damper comprises high-pressure tube 10. Piston 14 divides tube 10 into compression chamber CC and draft chamber CT communicated via piston 14. Hydraulic fluid tank 14 communicates with compression chamber CC. Control valve VC communicates draft chamber CT with tank 20 and comprises tubular case 40 with radial channel open toward tubular case inner chamber and tank 20. Locking rod 60 displaces axially in tubular case 40 between control valve open and closed position to communicate draft chamber CT with tank 20. Actuator A displaces locking rod 60 in tubular case 40.

EFFECT: higher tightness, fine adjustment.

23 cl, 12 dwg

 

The technical field

The present invention relates to a valve used in a hydraulic shock absorber, in particular a hydraulic shock absorber for wheeled vehicles, to enable regulation of the flow of hydraulic fluid in the shock absorber and through it changes due to the shock-absorber damping efforts in the direction of tightening, and in the direction of stretch.

The level of technology

From the prior art are well known hydraulic double-acting shock absorbers commonly used in suspension systems of automotive vehicles, and which contain pipe high pressure, inside of which is slidable mounted a piston separating pipe high pressure to lower the compression chamber and upstream of the traction chamber. Pipe high pressure has a lower end, a closed valve plate provided with a pair of channels, one of which accommodates the exhaust valve, and the other inlet valve, the upper end of the pipe high pressure closed sealing ring plate, which is moved in the axial direction of the rod, the end of which, inside a relatively high-pressure pipes, attached to the piston.

Graduation and PG is SKN valves provide the ability for a compression chamber having a restricted fluid communication with a reservoir for hydraulic fluid, in a General sense, educated around the pipe high pressure during the compression and tension movements of the shock absorber, respectively.

Also of prior art well-known to provide the piston with valve compression and traction valve, which sets the corresponding constraint messages fluid between the compression chamber and pulling the camera, when the compressive and tensile displacements of the shock absorber.

In these absorbers exhaust valve works in conjunction with valve compression in the piston, to allow, during the compression movement of the shock absorber, the flow of hydraulic fluid, simultaneously and in a limited way, from the compression chamber to the reservoir for the fluid in the traction chamber. Similarly, the inlet valve works in conjunction with traction valve in the piston, to allow, during the stretching movement of the shock absorber, the flow of hydraulic fluid, simultaneously and in a limited way, from a reservoir for hydraulic fluid and from the traction chamber in the interior of the compression chamber which increases in volume when you move up the piston.

In these absorbers degree of damping or stiffness of the shock absorber is constant and is set by the selection of the sections already in the manufacture of the channels of communication for fluid traction between the camera and the compression chamber, and between the latter and a reservoir for hydraulic fluid. The user or the manufacturer itself can not change the degree of damping after fabrication of the absorber.

To eliminate the above-mentioned operational drawback have been proposed hydraulic dampers are able to have their degree of damping, as modified by the manufacturer or collector during installation of the shock absorber or by the user during operation of the vehicle in which they are installed.

In these known hydraulic shock absorbers with adjustable degree of selective damping liquid interaction is provided between the traction chamber and a reservoir for hydraulic fluid which is a liquid interaction is provided with the regulating valve to allow the user to change the limits specified moving the flow of hydraulic fluid through the pressure losses in the specified message in a fluid environment, from the power chamber to the reservoir for hydraulic fluid, as in compressive moving and stretching movement of the shock absorber.

Despite the ability to control the degree of damping (reaction forces) hydraulic shock absorber known control valves are the I solenoid-activated, for example, in the system of two-position control is a relatively simple design, provide only two different operating modes for the shock absorber, one of them with a closed valve and damper operating more rigid manner, and another mode with a fully open valve and shock absorber working less hard way.

There are also Executive electromagnetic means which operate step-by-step way to provide different closed positions for regulating valve and, accordingly, different adjustments of the shock absorber. However, the design of these actuators is difficult and expensive.

Even attempts to provide control valves and their actuation, the specified adjustable movement of the shutter, had difficulties regarding the exclusion of even a small leakage of hydraulic fluid and also on ensuring appropriate controls with high sensitivity relative to the response to be received from the absorber when it is subjected to different operating modes on the vehicle speed and the load on it, and also the conditions of the road on which the vehicle is moving.

Leakage of hydraulic fluid between the valve parts and between which the valve and the reservoir of the shock absorber lead to loss of pressure, affecting the behavior of the shock absorber, in particular, at low speeds of the vehicle that may cause loss of control.

The gates of the known solutions have a reduced speed, which causes, even at small displacements, significant changes in the behavior of the shock absorber, making it difficult to extract the exact changes in the operation of the shock absorber.

Brief description of the invention

Due to the structural complexity of regulating flow valves known in the prior art that are associated with electromagnetic actuators on-off type regulation limiting or increasing in value or step-type operation, which is prone to leaks and is insensitive regulation, the present invention is the creation of regulating flow valve for a hydraulic shock absorbers, with simple, durable and sealed construction, which may accordingly be triggered by different actuators, also has a simple construction, and which are suitable for providing fine adjustment of the working of the provisions regulating valve defined closed position and a lot of open positions, to ensure the appropriate type of shock absorber, which is lechyutsya from each other in the exact setting of the regulating valve.

An additional object of the present invention is to provide a control valve of the above type, which can operate before and after installation of the shock absorber in the suspension of a wheeled vehicle.

Also the present invention is the creation of a control valve of the above type, which provides the possibility to reduce the pressure loss of the hydraulic fluid, increasing its flow through the valve.

Also the present invention is the creation of a regulating valve with the above-described characteristics, which provides greater comfort for the occupants of the vehicle, to the best behavior of vehicles travelling on roads that have a smooth surface or with different degrees of surface roughness, and also to greater stability and security for vehicles, such as buses and trucks, with a small or a large mass.

This regulating flow valve used in the hydraulic shock absorber with adjustable damping, which contains: tube of a high pressure; a piston that is moved in the inner part of the high-pressure pipes and dividing it into compression chamber and a power chamber, which selectively and danaperino reported other the other through axial channels, provided in the piston; a reservoir for hydraulic fluid, provided with selective bidirectional message in a fluid environment with the compression chamber; and regulating valve providing selective unidirectional message in a fluid environment, with a variable cross-section, between the traction chamber and reservoir. According to the invention the valve comprises a tubular casing attached to the outside pipe of high pressure and containing a regulating chamber having an inlet supported in the message for fluid propulsion chamber, an output chamber, maintained in the message by fluid from the reservoir through at least one of the outlet regulating hole connecting the regulating chamber and the output chamber with each other, and guide means coaxially with the regulatory aperture; shutter pin having a rod portion and the sealing portion with a cross-section varying along at least part of the sealing part, when this rod part and the sealing part are together, and selectively axially movable on guide means and in the inner part of the regulatory holes, respectively, between a closed position regulating holes and lots of open positions of the latter, in each position the second sealing part forms, together with the regulatory hole that corresponds to a circular area for passing hydraulic fluid in the reservoir; and actuating means, functionally connected with the bolt pin for axial movement, the inner end of the regulating holes, opening and closing of the regulating hole position.

Videopreteen the design of the valve allows it to easily join the design of the absorber and also to operate between a closed position and a fully open position, passing through different partially open position by the actuator, which may be a different sturdy construction, which are relatively easy and bursting discs. The design of the bolt pin provides him the possibility of reliable and adjustable movement in a variety of working positions, each corresponds to the operating mode of the shock absorber, which leads to greater sensitivity adjustment or calibration of the shock absorber.

The design of the control valve and its installation in a hydraulic shock absorber, as proposed by the present invention also provides the possibility of obtaining a higher degree of tightness of the hydraulic fluid and, therefore, better and more precise regulation is Finance with respect to the behavior of the shock absorber.

Brief description of drawings

The invention will be described hereinafter with reference to the accompanying drawings illustrating an example of a possible form of embodiment of the invention. In the drawings:

Fig. 1 is a simplified longitudinal section of a hydraulic shock absorber, which is adapted regulating valve made in accordance with this invention and shown in the fully open position;

Fig. 2 is an enlarged node control valve shown in Fig. 1, in the fully open position;

Fig. 3 is a top view of the cylindrical body, the compensation valve to be installed in the inner part of the regulating chamber;

Fig. 4 is a cross - section of the cylindrical body, control valve, shown in Fig. 3, the cross section taken along the line IV-IV from the previous drawing, and also shows the metal wall, the plate-like disk, which is attached on the center of the cylindrical casing by means of riveted pins, and shown in the closed position; and

Fig. 5-12 - longitudinal cross-section of different typical structural embodiments for the sealing pin.

A description of an example of a variant embodiment of the invention

As previously mentioned, the invention, in General, relates to a hydraulic double-acting shock absorbers, the underlying use, for example, in the suspension of wheeled vehicles, and which contain, in the main, cylindrical tube 10 of a high pressure, having a lower end, a closed valve plate 11, and an upper end, a closed annular plate 12, having the seal 12A, in which slides a rod 13 having an outside end of the pipe 10 high pressure, and the end of the inside of the latter and connected with the piston 14, which moves in the axial direction in the inner part of the tube 10 high pressure during operation of the shock absorber.

In a known manner, the piston 14 divides the inner part of the pipe 10 to the high pressure chamber CC compression button next to the valve plate 11, and on the traction chamber CT, is located near the ring plate 12.

The valve plate 11 provided with two groups of axial channels 11a, 11b connecting the interior of the chamber CC compression ratio with the interior of tank 20 for the hydraulic fluid, which takes the form of a tube surrounding, mainly coaxially of the pipe 10 high pressure. The tank 20 has its ends closed by any appropriate means well known from the prior art, by using, for example, a ring-like plate 12 at one of its ends.

In one of the groups of axial channels 11a valve plate 11 has an inlet valve 15A, todaka in another group of axial channels installed exhaust valve 15b, when the valves are unidirectional in order to provide opportunity for, respectively, the passage of hydraulic fluid from the reservoir 20 into the inner part of the CC compression ratio, when the shock absorber is subjected to tensile or pulling movement, and also the passage of hydraulic fluid from the chamber CC compression ratio in the reservoir 20, when the shock absorber is subjected to compressive displacement. Similarly, and as is well known from the prior art, the piston 14 is provided with two axial channels 14a, 14b, each of which is provided corresponding unidirectional valve (not shown), to allow flow of hydraulic fluid from one chamber to another in the interior of the pipe 10 high pressure moving the piston 14.

As shown, the pipe 10 to the high pressure side is surrounded by an intermediate tube 30, which forms, together with the pipe 10 high pressure and around her, the intermediate annular chamber CI, closed ring 31, and provided at least one input 32 for the fluid, open in the direction of the traction chamber CT, in the pipe 10 high pressure, and an outlet 33 for the fluid, open towards the inside of the tank 20 and is aligned with the radial hole 21 provided in the tank 20, the which is so to surround the pipe 10 to the high pressure and intermediate pipe 30.

To ensure the possibility of changing the degree of damping of the shock absorber provides a control valve VC, mounted on the outside of the pipe 10 high pressure, more specifically, the tank 20, and is made in some way to provide selective fluid interaction with a variable cross-section, between the traction chamber CT and the tank 20.

In accordance with the invention, the control valve VC comprises a tubular housing 40, which, in the shown construction, installed and fixed in the axial direction in the inner part of the tubular casing 50 which has a first end hermetically attached, usually by welding, to the reservoir 20, coaxially with the radial hole 21 of the latter, and a second end opposite the first end and open towards the outer part, while the tubular body 40, thus, remains attached externally to the pipe 10 high pressure.

The tubular body 40 of the regulating valve VC contains: regulating chamber CR, provided with inlet 41 supported in the message in a fluid environment with traction chamber CT, through the intermediate chamber CI; output camera CS, supported in the message by fluid from reservoir 20 through one or more output hole at back is s 42; regulating hole 43 connecting the regulating chamber CR and output camera CS with each other; and guide means 44, coaxial with the regulatory hole 43 and which, in the shown construction, take the form of an axial bore 44a provided in the tubular housing 40 and having an end open toward the inner part of the exit chamber of the CS, and the opposite end open towards the outer part of the tubular housing 40 and is functionally connected to the actuator A, which may be, for example, in the form of the actuator telescopic movement provided by a mechanical positioning device, by means of motor, by means of the stepping motor or by any other Executive means, which is capable of providing axial movement of the element to be moved by an actuating mechanism.

The control valve VC further comprises a stop pin 60, having a rod portion 61 and the sealing portion 62, the cross-section which varies along at least part of the sealing portion 62.

The core part 61 and the sealing portion 62, in General, are aligned and executed in the form of a single element, while the rod portion 61 is moved in the axial direction through and the additional funds on A guide means 44, which in the shown embodiment, is formed an axial hole 44a of the tubular housing 40, while the sealing portion 62 moves, with radial clearance, the inner end of the regulating hole 43, between completely or almost completely closing the regulating hole 43 position (not shown) and a set of open provisions regulating holes 43 in each of the provisions of the sealing portion 62 forms, together with the latter corresponding to a circular area for passing hydraulic fluid in the reservoir 20.

The rod portion 61 of the bolt pin 60 provided with at least one circular groove 61a, in which is placed a sealing ring 63, typically elastomeric, which interacts with the inner surface of the axial bore 44a of the tubular housing 40, to ensure the tightness of the installation of the sealing pin 60 in the axial hole 44a, preventing the flow of hydraulic fluid in the latter.

According Fig. 5-8 of the sealing portion 62 can be designed in such a way as to have a free end region 62a with a reduced cross-section, which may be formed as a thin end (not shown), and the transition region from the core part 61, the annular ledge 64. With this design of the sealing portion 62 is located in the output of the th camera CS, and in regulatory hole 43 for axial movement by the Executive funds A, between a closed position (not shown), in which the annular ledge 64 is adjacent to the section of the ring wall of the output chamber CS formed around the regulating holes 43, completely blocking it, and open positions in which the annular ledge 64 is located at a distance from the regulating hole 43, as shown in Fig. 2, where the sealing portion 62 is in the maximum open position of the valve.

Otherwise, shown in Fig. 9-12 embodiment, the sealing portion 62 has, in its connection with the core part 61, the cross-section with essentially reduced path in order to form, together with the regulatory hole 43, the largest circular area for passing hydraulic fluid, the valve is fully open. In the free end region 62a, the sealing portion 62 has a cross-section similar to the cross section of the regulating hole 43, to form with it an annular area, sufficient only to allow free axial movement of the sealing portion 62 in the inner part of the regulating hole 43. In this constructive variant of the sealing portion 62 is located in the inner part as a regulating chamber CR, and maintains the existing holes 43, for axial movement between a closed position (not shown), in which its free end region 62a is located in the inner part of the regulating hole 43, and open positions (also not shown), in which the free end region 62a is located outside of the regulatory holes and towards the inner part of the regulating chamber CR. In Fig. 5-12 shows the packing pins 60 with their bolt carrier part 62 having the shape of a truncated cone or, in a General sense, the shape of a truncated cone. In the sealing portion 62 in Fig. 5, the free end region 62a forms a smaller base of the truncated cone shape, whereas in the variant of Fig. 9 free end region 62a forms a larger base of the truncated cone shape.

As shown here, essentially the shape of a truncated cone sealing part 62 can be obtained in different ways, having its lateral surface formed by rotation of a generatrix defined: a straight line, forming the shape of a truncated cone, as shown in Fig. 5-9; curved line in the form of a convex or concave arc, as shown in Fig. 6 and 11 and also in Fig. 7 and 10, respectively; lots of straight or curved segments connected to each other through radial ledges, or a combination of these form designed to obtain specific Tsvetnoy operation of the shock absorber for the different operating positions of the sealing portion 62 in the inner part of the regulating hole 43.

Shown on the design drawings regulating chamber CR is a tubular structure having an open end forming an inlet opening 41, and the opposite end closed and having passing in the axial direction of the regulating hole 43.

The regulating chamber CR may be formed in the inner part of the tubular insert 45 having a closed end located and secured near the end of the tubular housing 40, while the output chamber CS is formed in the inner end part of the cylindrical recess 40a of the tubular body 40, the recess which is closed from the front side of the closed end of the tubular insert 45. In the shown construction the open end of the regulating chamber CR is formed in a plane parallel to the axis of the pipe 10 high pressure and next to last, providing education entrance opening 41 in cooperation with the interior of the intermediate chamber CI.

Output camera CS has a cylindrical shape end of the cylindrical recess 40a of the tubular housing 40 and is located adjacent and coaxially with the regulating chamber CR. In this construction the tubular body 40 has multiple radially arranged outlet openings 42, which connects the inner part of the output of the camera with CS outer part of the tubular housing 40. It should be understood that vinodrajkumar CS may have other forms, which can be easily obtained using the process of formation of the tubular housing 40 and the regulating chamber CR.

In accordance with the illustrated construction of the regulating chamber CR is formed in the inner part of the tubular insert 45 and the extension sleeve 46, which is installed and securely fastened, sealed and tight way around the open end portion of the tubular insert 45, and having a free end, which forms an inlet opening 41 of the regulating chamber CR.

As already mentioned above, the tubular casing 50 has its first end attached to the outside of the tank 20, concentrically surrounding the radial hole 21 of the reservoir 20 and radially protruding from the latter. The tubular body 40 is hermetically secured in the inner part of the tubular casing 50 by connection or by any other appropriate means, typically using at least one sealing ring 47 is placed in the circular groove 40b provided outside the tubular housing 40, and communicates with the adjacent inner circular part of the tubular casing 50.

The tubular body 40 to the interior of the tubular casing 50 is performed so that the open end of the regulating chamber CR, which in the shown embodiment, is formed by a free end of the extension sleeve 46 could be GE is metecno attached to the intermediate tube 30 on the periphery relative to the outlet 33 to the fluid transfer chamber CI, passes with radial clearance in the radial hole 21 of the tank 20.

The design forces the tubular body 40 to take all the internal cross-section of the tubular casing 50, sealing the free end of the latter, in which the Executive means A functionally connected with the bolt by a pin 60. However, in the area of the exit chamber CS and the regulating chamber CR, the tubular body 40 has a reduced outer diameter, causing the two chambers to form, together with the tubular casing 50, an annular chamber CA with the end closed by the peripheral annular ledge 40c, which increases the diameter of the tubular housing 40, and an opposite end that is open toward the inner part of the tank 20 through its radial hole 21. Thus, the outlet port 42 of the output camera CS are open towards the inner part of the annular chamber CA and, therefore, towards the inner part of the tank 20.

As shown in Fig. 2, the open end of the regulating chamber CR, more specifically, the open end of the extension sleeve 46 which is inserted in the hole 33 of the intermediate chamber (CI) and is bent radially outward and attached to the inside of the intermediate tube 30, in addition there are two external flange 46b, radially on the outside attached to the extension sleeve 46 or other external h the STI regulating chamber CR and subject to location working as a connective limiting stoppers, outside relative to the intermediate tube 30 in the longitudinal direction.

To ensure a greater degree of tightness of the installation of the regulating chamber CR relative to the intermediate pipe 30 to the outlet 33 of the latter may be o-ring 33a, typically elastomeric, affecting the adjacent wall section of the regulating chamber CR.

To save the decreasing curve pressure loss of the hydraulic fluid passing through the control valve VC, while increasing the flow of hydraulic fluid through the valve is also provided with compensating valve 70 mounted in the inner part of the regulating chamber CR, between the inlet 41 and the regulating hole 43, and having a cylindrical body 71, which is located around the circumference and is sealed relative to the extension sleeve 46 is located in the axial direction near the free end of the tubular insert 45; is provided with one or more axial channels 72; and supports at least one metallic wall 73, which is elastically deformable, depending on the hydraulic pressure of the fluid above in the course relative to the corresponding axial channel 72 between a closed position in which it limits, the particular high degree, the flow of hydraulic fluid through the respective axial channel 72, and a fully open position in which it limits, to a much lesser extent, the flow of hydraulic fluid through the axial channel 72.

In the shown construction, prismatic casing 71 has a lot of axial channels 72, spaced from each other along the Central circular alignment, while the metal partition wall 73 formed from one or more lamellar disks 73a arranged coaxially superimposed on each other, closing all axial channels 72, and is attached at the center to the prismatic body 71 in such a way as to have their outer annular region, which interacts with the axial channels 72, decline between closed and fully open positions.

Attaching one or more drive plate 73a to the prismatic body 71 can be performed by a Central rivet 74 with the end I made with the possibility of the formation of the stopper for limiting the opening plate of the disk.

To ensure the tightness of the installation compensating valve 70 in the inner part of the regulating chamber CR prismatic casing 71 of the compensation valve has at least one peripheral groove 75, which accommodates the elastic platitudinously 76, typically elastomeric, which interacts with the adjacent inner peripheral region of the regulating chamber CR. In the shown example, the design of the elastic sealing ring 76 communicates with the extension sleeve 46, and prismatic casing 71 is axially adjacent to the free end of the tubular insert 45.

Although there has been shown only one embodiment of the invention, it should be understood that there may be changes in the shape and arrangement of the various component parts control valve, not going beyond the ideas and scope of the invention defined in the claims attached to the present description.

1. Regulating flow valve for a hydraulic shock absorber with adjustable damping, which contains a pipe (10) high pressure; a piston (14)is moved in the inner part of the tube (10) high pressure and separating it on the camera (CC) compression and traction chamber (CT), which selectively and danaperino communicated with each other through axial channels (14a, 14b)provided in the piston (14); a reservoir (20) for hydraulic fluid, provided with selective bidirectional message in a fluid environment with camera (CC) compression ratio; and the control valve (VC), providing selective unidirectional message in a fluid environment, with preministerial, between the traction chamber (CT) and the reservoir (20), while the control valve (VC) includes: a tubular housing (40), outside attached to the pipe (10) high pressure and containing a regulating chamber (CR)having an inlet (41), maintained in the message in a fluid environment with traction chamber (CT), the output of the camera (CS), maintained in the message by fluid from the tank (20) via at least one outlet opening (42), regulating hole (43), connecting the regulating chamber (CR), and the output chamber (CS) with each other, and guide means (44), coaxially with the regulating hole (43); the bolt pin (60)having a core part (61) and the sealing part (62) with a cross-section varying along at least part of the sealing part, while the main part and the sealing part are together, and selectively axially movable on guide means (44) and in the inner part of the regulating hole (43), respectively, between a closed position regulating holes (43) and a set of open positions of the latter, in each position of the sealing portion (62) forms, together with the regulatory hole (43), corresponding to a circular area for passing hydraulic fluid in the reservoir (20); and Executive agent (A), functionally connected with satwa the s pin (60) to its axial movement, in the inner part of the regulating hole (43)in the opening and closing of the regulating hole (43) position, characterized in that the control valve (VC) further comprises compensating valve (70)is installed in the inner part of the regulating chamber (CR)between the inlet (41) and regulating hole (43), and having a prismatic body (71)is provided with at least one axial channel (72) and supporting at least one corresponding metal partition (73), which is providepulmonary, depending on the hydraulic pressure of the fluid above during relative axial channel (72), between a closed position in which it limits, in particular a high degree, the flow of hydraulic fluid through the axial channel (72), and a fully open position in which it limits, to a much lesser extent, the flow of hydraulic fluid through the axial channel (72).

2. The valve according to claim 1, characterized in that the regulating chamber (CR) is a tubular structure with an open end forming an inlet (41), and with the opposite end closed and having in the axial direction of the regulating hole (43).

3. The valve according to claim 2, characterized in that the open end of the regulating chamber (CR) is formed in a PLoS the spine, parallel to the axis of the pipe (10) high pressure and the next to the last.

4. The valve according to claim 2, characterized in that the output of the camera (CS) has a cylindrical shape and is coaxially and adjacent to the regulating chamber (CR), with a tubular housing (40) is equipped with a multitude of radially arranged outlet openings (42)connecting the inner part of the output of the camera (CS) with the outside of the tubular housing (40).

5. The valve according to claim 2, characterized in that the regulating chamber (CR) is formed in the inner part of the tubular insert (45) with a closed end located and secured near the end of the tubular housing (40), while the output of the camera (CS) formed in the inner end part of the cylindrical recess (40A) of the tubular housing (40), closed on the end side of the closed end of the tubular insert (45).

6. The valve according to claim 5, characterized in that the regulating chamber (CR) is formed in the inner part of the tubular insert (45) and the extension sleeve (46), which is installed and fixed tight and airtight manner around an open end portion of the tubular insert (45) and having a free end, which forms the inlet (41) of the regulating chamber (CR).

7. The valve according to claim 1, characterized in that the prismatic body (71) of the compensation valve (70) is provided with multiple axial channels (72)spaced from each other along C is antralnogo circular alignment, when the metallic partition (73)associated with each axial channel (72)formed of at least one plate disk (73a), closing all axial channels (72), and attached at the center to the prismatic body (71) in such a way as to have its outer annular region, which interacts with the axial channels (72), decline between closed and fully open positions.

8. The valve according to claim 1, characterized in that the lamellar disk (73a) attached to a prismatic casing (71) by means of a Central rivet (74)having an end (a)made with the possibility of the formation of the stopper for limiting the opening plate of the disk (73a).

9. The valve according to claim 1, characterized in that the prismatic case (71) has at least one peripheral groove (75)placing an elastic sealing ring (76), interacting with the adjacent inner peripheral region of the regulating chamber (CR).

10. The valve according to claim 1, characterized in that the guiding means (44) is formed an axial hole (44a), secured in a tubular housing (40) and having an end open toward the inner part of the exit chamber (CS), and the opposite end facing the actuator (A), while the core part (61) of the sealing pin (60) is moved in the axial direction in the inner frequent the axial hole (44a) and provided at least one circular groove (61A)placing a sealing ring (63), which interacts with the inner surface of the axial bore (44a) of the tubular housing (40).

11. The valve of claim 10, wherein the sealing portion (62) has a free end region (a) with reduced cross-section contour and, in its transition region from the core part (61), the annular ledge (64), while the sealing portion (62) is located in the outlet chamber (CS) and in the control hole (43) and is moved in the axial direction between a closed position in which the annular ledge (64) depends on the section of the ring wall of the output chamber (CS), around the regulating hole (43), completely blocking the latter, and open positions in which the annular ledge (64) is supported at a distance from the regulating hole (43).

12. The valve of claim 10, wherein the sealing portion (62) has, in its connection with the core part (61), the cross-section with essentially reduced contour and, in the free end region (a), cross-section similar to the cross section of the regulating hole (43), for education together with him annular area, sufficient only to allow free axial movement of the sealing portion (62) in the inner part of the regulating hole (43), while sat the RNA portion (62) is located in the inner part of the regulatory camera (CR) and regulating hole (43) and is moved between a closed position, in which its free end region (a) is located in the inner part of the regulating hole (43), and open positions in which the free end region is located outside of the regulating hole (43)in the direction to the interior of the regulating chamber (CR).

13. The valve of claim 10, wherein the sealing portion (62) has essentially the shape of a truncated cone, with a free end region (a), forming one of the larger and smaller bases of the form.

14. The valve 13, characterized in that the sealing portion (62)having essentially the shape of a truncated cone, has a side surface formed by rotating one form selected from a straight line, the set of straight or curved segments connected by a radial shoulder, a concave arc, curved arc or combinations thereof.

15. The valve of claim 10, wherein the regulating chamber (CR) is a tubular structure with an open end forming an inlet (41), and with the opposite end closed and having in the axial direction of the regulating hole (43).

16. The valve 15, characterized in that the regulating chamber (CR) is formed in the inner part of the tubular insert (45) with a closed end located and secured near the end of the tubular housing (40), with the initial camera (CS) formed in the inner end part of the cylindrical recess of the tubular housing (40), closed from the front side of the closed end of the tubular insert (45).

17. The valve according to item 16, characterized in that the regulating chamber (CR) is formed in the inner part of the tubular insert (45) and the extension sleeve (46), which is installed and fixed tight and airtight manner around an open end portion of the tubular insert (45) and having a free end, which forms the inlet (41) of the regulating chamber (CR).

18. The valve 17, characterized in that it further comprises a compensation valve (70), which is installed in the inner part of the regulating chamber (CR)between the inlet (41) and regulating hole (43), and having a prismatic body (71)is provided with at least one axial channel (72) and supporting at least one corresponding metal partition (73), which is providepulmonary, depending on the hydraulic pressure of the fluid above during relative axial channel (72), between a closed position in which it limits, in particular a high degree, the flow of hydraulic fluid through the axial channel (72), and a fully open position in which it limits, to a much lesser extent, the flow of hydraulic fluid through the axial channel (72).

19. The valve p, characterized in that the por is maticevski corps (71) the compensation valve (70) is provided with multiple axial channels (72), spaced from each other along the Central circular alignment, when the metallic partition (73), which is associated with each axial channel (72)formed of at least one plate disk (73a), closing all axial channels (72), and attached at the center to the prismatic body (71) in such a way as to have its outer annular region, which interacts with the axial channels (72), decline between closed and fully open positions.

20. Valve according to any one of PP-19, characterized in that the tube (10) high pressure side is surrounded by an intermediate pipe (30)which forms, together with the pipe (10) high pressure, an intermediate annular chamber (CI) with closed ends and provided at least one input (32) for the fluid, open towards the inner part of the traction chamber (CT) in the tube (10) high pressure, and (33) for the fluid in the intermediate pipe (30) and open towards the inner part of the tank (20), the pipe (10) high-pressure and intermediate pipe (30) is installed in the inner part of the tubular reservoir (20), while the control valve (VC) differs in that the tubular body (40) is tightly installed and fixed in the inner part of the tubular casing (50)having a first end hermetically attached to the tank (20), the district radial holes (21), and second opposite open end, thus regulating chamber (CR) a tubular housing (40) has its open end hermetically attached to the intermediate tube (30), on the periphery relative to the outlet (33) for the fluid transfer chamber (CI), and passing, with a radial clearance in the radial hole (21) of the reservoir (20), thus regulating chamber (CR) and the output chamber (CS) form, together with the tubular casing (50), an annular chamber (SA) end, a closed tubular housing (40), and with the opposite end open toward the radial hole (21) of the reservoir (20), the outlet (42) of the output of the camera (CS) is open towards the inner part of the annular chamber (SA).

21. The valve according to claim 20, characterized in that the tubular body (40) from the outside is provided with a circular groove (40b)placing the sealing ring (47), which communicates with the tubular casing (50).

22. The valve according to claim 20, characterized in that the open end of the regulating chamber (CR) is attached to the inside of the intermediate pipe (30)through the outlet (33) of the intermediate chamber (CI), thus regulating chamber (CR) has two external flange (46b), located on the outside of the intermediate pipe (30).

23. The valve according to article 22, characterized in that the outlet (33) of the intermediate chamber (CI), which is formed in the intermediate tube (3), has a sealing ring (33a), acting on the adjacent wall section of the regulating chamber (CR).



 

Same patents:

FIELD: transport, electrical engineering.

SUBSTANCE: proposed device incorporates electric heaters arranged on shock absorber casing and connected to the control unit that exercises control over connection of the aforesaid heaters to power supply circuit and disconnection thereof. The heaters are fastened to the shock absorber casing by clamps rigidly attached to the said casing. The said clamps represent two links coupled by means of a "rod-slot" joint. On of the said links comprises mounting element, i.e. ears, made integral to accommodate heaters. To adjust the clamp hole diameter in the aforesaid joint, the slots are arranged in several rows.

EFFECT: simpler design, ease of use, possibility to be incorporated with various cars.

3 cl, 4 dwg

Combined suspension // 2149106
The invention relates to hydraulic systems independent suspension of the wheels of the car

Hydraulic damper // 2457375

FIELD: machine building.

SUBSTANCE: proposed device comprises hollow case accommodating hydraulic cylinder to make working fluid chamber. Hydraulic cylinder piston and rod are arranged to produce piston and rod ends. Damping device is arranged between case and cylinder and furnished with cover coupled with structural element accommodating restrictor and safety valve to communicate said piston and rod ends with said chamber. Cover has annular groove with seal fitted therein and is arranged to make drain chamber communicated with aforesaid chamber. Annular groove with support and sealing elements fitted therein is arranged at structural element on rod side. Safety valve is made up of plunger with flanges and cylindrical guide housing locking element to move relative plunger flange for contact with seat arranged on structural element for communication of rod en with drain chamber and, further, with aforesaid chamber. Cover seal is made up of sealing scraper. Annular grooves in cover and structural elements are open toward drain chamber wherein adjusting washer with annular ledge is arranged to lock sealing scraper. Said locking element has toroidal grooves on working fluid flow path at safety valve open.

EFFECT: simplified design, expanded operating performances.

4 cl, 4 dwg

FIELD: machine building.

SUBSTANCE: invention relates to automotive machine building, particularly, to automotive cushioning systems. The proposed shock absorber comprises hydraulic cylinder filled with working fluid and accommodating piston and rod, and hydraulic accumulator. The rod lower part is furnished with radial throttling orifices and spring-loaded control plunger with edge covering aforesaid orifices. The said radial throttling orifices are spaced along the rod length so that the said control plunger jumps the orifices in turn, thus gradually varying the total flow section. The control plunger is fitted in the piston, outside the working fluid flows, and can deviate from its normal position only under gravity.

EFFECT: higher comfort and controllability of vehicle in running over irregular road coat.

3 dwg

FIELD: automotive industry.

SUBSTANCE: controlled hydraulic shock absorber comprises telescopic hydraulic two-tube shock absorber. The rod of the shock absorber is made of a hollow rod provided with the flange having a groove for roller thrust bearing and vertical slots from the other side. The hollow of the rod receives the hollow rod of by-pass valve for permitting vertical movement. The top section of the rod is provided with trapezium right thread, and the bottom section is provided with the stop for the spring of the valve. The driven pinion is screwed on the threaded part of the rod of the by-pass valve. The bottom of the driven pinion abuts against the roller thrust bearing that is mounted in the groove in the flange of the hollow rod. The second driven pinion is screwed on the threaded part of the valve rod. The top side of the pinion abuts against the roller thrust bearing. The third roller thrust bearing is interposed between the driven pinions. The driven pinions engage the driving gears mounted on the shaft of the electric motor. The control unit is connected with the electric motor and receives the signal from the pickups of suspension vibration and velocity pickup.

EFFECT: improved shock absorbing.

The invention relates to mechanical engineering and for the creation of a pneumatic springs

FIELD: automotive industry.

SUBSTANCE: controlled hydraulic shock absorber comprises telescopic hydraulic two-tube shock absorber. The rod of the shock absorber is made of a hollow rod provided with the flange having a groove for roller thrust bearing and vertical slots from the other side. The hollow of the rod receives the hollow rod of by-pass valve for permitting vertical movement. The top section of the rod is provided with trapezium right thread, and the bottom section is provided with the stop for the spring of the valve. The driven pinion is screwed on the threaded part of the rod of the by-pass valve. The bottom of the driven pinion abuts against the roller thrust bearing that is mounted in the groove in the flange of the hollow rod. The second driven pinion is screwed on the threaded part of the valve rod. The top side of the pinion abuts against the roller thrust bearing. The third roller thrust bearing is interposed between the driven pinions. The driven pinions engage the driving gears mounted on the shaft of the electric motor. The control unit is connected with the electric motor and receives the signal from the pickups of suspension vibration and velocity pickup.

EFFECT: improved shock absorbing.

FIELD: machine building.

SUBSTANCE: invention relates to automotive machine building, particularly, to automotive cushioning systems. The proposed shock absorber comprises hydraulic cylinder filled with working fluid and accommodating piston and rod, and hydraulic accumulator. The rod lower part is furnished with radial throttling orifices and spring-loaded control plunger with edge covering aforesaid orifices. The said radial throttling orifices are spaced along the rod length so that the said control plunger jumps the orifices in turn, thus gradually varying the total flow section. The control plunger is fitted in the piston, outside the working fluid flows, and can deviate from its normal position only under gravity.

EFFECT: higher comfort and controllability of vehicle in running over irregular road coat.

3 dwg

Hydraulic damper // 2457375

FIELD: machine building.

SUBSTANCE: proposed device comprises hollow case accommodating hydraulic cylinder to make working fluid chamber. Hydraulic cylinder piston and rod are arranged to produce piston and rod ends. Damping device is arranged between case and cylinder and furnished with cover coupled with structural element accommodating restrictor and safety valve to communicate said piston and rod ends with said chamber. Cover has annular groove with seal fitted therein and is arranged to make drain chamber communicated with aforesaid chamber. Annular groove with support and sealing elements fitted therein is arranged at structural element on rod side. Safety valve is made up of plunger with flanges and cylindrical guide housing locking element to move relative plunger flange for contact with seat arranged on structural element for communication of rod en with drain chamber and, further, with aforesaid chamber. Cover seal is made up of sealing scraper. Annular grooves in cover and structural elements are open toward drain chamber wherein adjusting washer with annular ledge is arranged to lock sealing scraper. Said locking element has toroidal grooves on working fluid flow path at safety valve open.

EFFECT: simplified design, expanded operating performances.

4 cl, 4 dwg

FIELD: transport.

SUBSTANCE: hydraulic damper comprises high-pressure tube 10. Piston 14 divides tube 10 into compression chamber CC and draft chamber CT communicated via piston 14. Hydraulic fluid tank 14 communicates with compression chamber CC. Control valve VC communicates draft chamber CT with tank 20 and comprises tubular case 40 with radial channel open toward tubular case inner chamber and tank 20. Locking rod 60 displaces axially in tubular case 40 between control valve open and closed position to communicate draft chamber CT with tank 20. Actuator A displaces locking rod 60 in tubular case 40.

EFFECT: higher tightness, fine adjustment.

23 cl, 12 dwg

FIELD: transport.

SUBSTANCE: invention relates to railway transport. The system contains vertical hydraulic dampers installed under body. Each damper is made as piston pump with discharge and free-flow intercommunicating via throttle chambers for working fluid. The throttle is equipped with rod of variable cross-section with thrusts for end positions. Throttle rod movement drive is made as return spring and solenoid. Solenoid core is connected with throttle rod. Solenoid coils are attached to output terminals of control unit. Input terminals of control unit are connected with electric power source and oscillation frequency sensors installed on body in the area of each damper location. Control unit provides automatic change of end positions of throttle rod by solenoid electric power switching on or off according to indications of corresponding sensors of body vibration frequency.

EFFECT: design simplification and improvement of car movement smoothness.

3 cl, 1 dwg

FIELD: machine building.

SUBSTANCE: shock-absorber contains reservoir, hydraulic cylinder with compression valve, rod with piston. The piston is equipped with bypass valve and rebound valve. The casing of shock-absorber force control valve is tightly connected to the hydraulic cylinder and has outlet channel with shutoff element. The outlet channel is connected to the hole in hydraulic cylinder. The shutoff element is connected to the membrane. The membrane is mounted in membrane chamber made with the possibility of exerting external control influence on membrane. According to the first version membrane chamber is fixed on reservoir in shock-absorber. According to the second version membrane chamber is fixed on the casing of shock-absorber force control valve in shock-absorber.

EFFECT: extension of possibilities to control shock-absorber's force at simultaneous increase of rod's strength.

2 cl, 3 dwg

FIELD: machine building.

SUBSTANCE: damper comprises hollow housing (10), cylinder piston (20) with the piston head, which forms two active hydraulic cameras, rod and deflecting units. A hydraulic compensator (40) is made with the internal volume of fluid medium, which is much greater than the volume of fluid medium removed from the housing. A hydraulic manifold (30) is located between the housing and hydraulic compensator. The control manifold is connected to the hydraulic compensator and establishes the passage between cameras. Manifold contains the interchangeable hydraulic valves (CV1, RV1; CV2, RV2) of the cartridge type for throttling of fluid medium flowing from cameras into the passage, allowing fluid medium to flow freely into cameras from the passage.

EFFECT: decrease of sensitivity to variations of oil temperature, absence of cavitation, simplification of damper adjustment.

4 cl, 3 dwg

Shock absorber // 2570243

FIELD: machine building.

SUBSTANCE: shock absorber contains a cylinder with work fluid. The piston is inserted in the cylinder and separates the cylinder to two chambers. The piston rod is connected with the piston. The damping valve is installed in the first channel. The through section regulation mechanism is installed in the piston and regulates the through section of the second channel based on the piston rod position. The damping force decreases for tension and increases for compression in the set rod position at large extension. The damping force increases for tension and decreases for compression in the set rod position at small extension. In the shock absorber under the second option the damping force decreases for tension and compression in set rod position at small extension. In the shock absorber under the third option the damping force decreases for tension and compression in set rod position at large extension. The damping force increases for tension and decreases for compression in the set rod position at small extension. The shock absorber under the 4th option is installed between the wheel and body of the vehicle. Mechanism regulating the vehicle height is installed in parallel with the shock absorber.

EFFECT: extension of dampening characteristics.

16 cl, 25 dwg

FIELD: transport, electrical engineering.

SUBSTANCE: proposed device incorporates electric heaters arranged on shock absorber casing and connected to the control unit that exercises control over connection of the aforesaid heaters to power supply circuit and disconnection thereof. The heaters are fastened to the shock absorber casing by clamps rigidly attached to the said casing. The said clamps represent two links coupled by means of a "rod-slot" joint. On of the said links comprises mounting element, i.e. ears, made integral to accommodate heaters. To adjust the clamp hole diameter in the aforesaid joint, the slots are arranged in several rows.

EFFECT: simpler design, ease of use, possibility to be incorporated with various cars.

3 cl, 4 dwg

FIELD: transport.

SUBSTANCE: hydraulic damper comprises high-pressure tube 10. Piston 14 divides tube 10 into compression chamber CC and draft chamber CT communicated via piston 14. Hydraulic fluid tank 14 communicates with compression chamber CC. Control valve VC communicates draft chamber CT with tank 20 and comprises tubular case 40 with radial channel open toward tubular case inner chamber and tank 20. Locking rod 60 displaces axially in tubular case 40 between control valve open and closed position to communicate draft chamber CT with tank 20. Actuator A displaces locking rod 60 in tubular case 40.

EFFECT: higher tightness, fine adjustment.

23 cl, 12 dwg

FIELD: transport.

SUBSTANCE: invention relates to machine building, particularly, to vehicle suspensions. The suspension includes operating cylinder damper body with two springs. One spring is installed between damper body and piston connected with dismountable rod. The rod consists of upper half inside which channel is drilled for liquid input for damping control, and lower half. Piston with choke valves is fixed between halves of rod. The second spring is installed between the piston connected with rod and the piston forming cavity for liquid in the lower part of cylinder to change force.

EFFECT: possibility of stepless force and damping regulation.

3 dwg

FIELD: machine building.

SUBSTANCE: shock-absorber contains reservoir, hydraulic cylinder with compression valve, rod with piston. The piston is equipped with bypass valve and rebound valve. The casing of shock-absorber force control valve is tightly connected to the hydraulic cylinder and has outlet channel with shutoff element. The outlet channel is connected to the hole in hydraulic cylinder. The shutoff element is connected to the membrane. The membrane is mounted in membrane chamber made with the possibility of exerting external control influence on membrane. According to the first version membrane chamber is fixed on reservoir in shock-absorber. According to the second version membrane chamber is fixed on the casing of shock-absorber force control valve in shock-absorber.

EFFECT: extension of possibilities to control shock-absorber's force at simultaneous increase of rod's strength.

2 cl, 3 dwg

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