Rail vehicle parking brake with high efficiency factor

FIELD: transport.

SUBSTANCE: invention relates to railway transport, specifically to braking systems of rail vehicles. The parking brake includes braking cylinder with piston actuated by working fluid, as well as with parking brake having control lever installed with rotation possibility which rotation is transferred to shaft. The piston actuates piston rod of wheel brake cylinder which rod is coaxial with braking cylinder axis. The shaft is installed with possibility to turn perpendicular to braking cylinder axis via shaft bearing in body. Control lever is intended to initiate shaft rotating movement which is transformed into parallel to braking cylinder axis linear movement of support roller installed with possibility to rotate by means of support roller bearing on parallel to shaft axis of rotation by means of cam. The cam has working surface interacting with radial outer surface of support roller during clamping or releasing travel of parking brake. Cam working surface is made as portion of cylinder surface circumference the central axis of which performs circular trajectory of movement around shaft axis during clamping or releasing travel of parking brake.

EFFECT: higher efficiency factor of device.

13 cl, 6 dwg

 

This invention relates to a brake device of a rail vehicle containing at least one working brake cylinder, at least one is driven by the working fluid by the piston of the working cylinder, resulting in action coaxially with the axis of the brake cylinder piston rod of the working cylinder, and with the Parking brake device is installed can be rotated by the control lever, the rotary motion which is transmitted to the shaft, mounted with a possibility of rotation perpendicular to the axis of the brake cylinder, at least through the bearing shaft in the housing, and the control lever is designed to initiate movement of rotation the shaft, which is converted into directed parallel to the axis of the brake cylinder linear motion, at least one set can be rotated by the supporting roller bearing located parallel to the shaft axis of rotation of the support roller by at least one Cam connected to the detent from turning with the shaft, with the said Cam has a working surface that interacts during the course of clamping or course release the Parking brake device with a radially outer surface of the support roller, and Lin is inoe movement of the support roller is transmitted to the piston rod of the working cylinder according to the restrictive part of claim 1 of the claims.

The brake device is known from document EP 0674116 B1, equipped with a Parking brake device containing symmetric actuation Cams and reside Cams on the shaft with involute contour are engaged on both sides of the pipe, the piston rods with rollers mounted on the pipe piston rod can be rotated around a common axis of rotation. As such, the Parking brake device because of the relatively high weight of rail vehicles should invest great efforts of the Parking brake, the desired high efficiency of the Parking brake device with the least possible friction force.

The objective of the proposed invention is to improve the braking device specified above so that it had more high efficiency.

This problem is solved by means of a braking device, characterized by the characteristics of claim 1 of the claims.

According to the invention the working surface of the Cam is made as a segment of a circle surface of the cylinder, the Central axis during the course of clamping or course release the Parking brake device performs a circular trajectory around the axis of the shaft, and there is a point of intersection of this trajectory the movement with the axis of the brake cylinder, which corresponds, essentially, the maximum force of the Parking brake.

During the course of clamping or course release the Parking brake device due to geometrical relations, in particular, between the working surface of the Cam and the outer surface of the support roller occurs the passage of the efforts of the Parking brake, maximum at a certain point or in a specific area. If at this point or at this site effort Parking brake is missing the shoulder of efforts between the specified motion trajectory and the axis of the brake cylinder or located and aligned to it by the piston rod of the working cylinder, in the transmitting brake clamping the efforts of the piston rod of the working cylinder is not initiated by shear force, resulting in a slight friction force, and therefore, the high efficiency of the Parking brake device. Because of the efforts of friction, based on cross efforts also have a maximum value exactly at the site of the stroke of the clamping or course of tightening of the Parking brake device, in which occurs the maximum force of the Parking brake.

Under "swing clamp according to the invention understand the path or angle, which must go through the components of the Parking brake the testing device, based on the released brake initial position, in which pads the brake pads are at a distance, as from a pair of friction and brake disc, due to the air gap, to the clamping position, in which the force of the Parking brake maximum.

In accordance with this under "course release" understand according to the invention the path or angle, which are components of the Parking brake device according to the position of the clamp, whereby the force of the Parking brake as before released the brake starting position, in which pads the brake pads are at a distance, as from a pair of friction and brake disc, due to the air gap.

Disclosed in the dependent claims, the invention features create an opportunity for preferred advanced options and upgrades of the invention set forth in the independent claims.

Particularly preferably, if the shaft and at least one support roller, arranged so that the entire stroke of the clamp, at the beginning of the stroke of the clamp, the distance between the line of action of the force, continuing, on the one hand, between the tangent between the working surface of the Cam and the surface of the support rollers, on the one hand, and the axis of the supporting roles is s, on the other hand, and the axis of the shaft has a maximum value. The larger the distance between the line of action of the force and the axis of the shaft, the lower gear ratio, which has a Cam mechanism due to the interaction of the working surface of the Cam and the surface of the support roller.

In other words, the gear ratio to the beginning of the stroke of the clamping least when you only want to overcome the gap between the pads the brake pads and the respective pair of friction. The gear ratio increases then with increasing speed clamping, since the distance between the line of action of the force and the axis of the shaft is reduced. This procedure has the advantage that in this case, with the increase of the stroke of the clamping increases the power ratio formed by the working surface of the Cam and the surface of the support roller of a Cam mechanism, and therefore better meets the requirements according to which at the beginning of the stroke of the clamp by a small clamping force should only overcome the gap, and by the end of the clamp requires a large clamping force is required to achieve the maximum force of the Parking brake.

According to an improved variant of execution of the invention, there are two Cam, placed symmetrically to the axis of the cylinder, the United sustainably is to turn with the shaft, as well as interacting with Cams and located symmetrically to the axis of the cylinder support roller. In addition, at least two bearing shaft, symmetrically to the axis of the cylinder, and, when viewed in the direction perpendicular to the axis of the brake cylinder, the shaft bearings and the supporting roller bearings are offset to each other.

Assuming that the shaft bearings and the supporting roller bearings are respectively one particular radial structural space, has the advantage that in this case, the shaft bearings and the supporting roller bearings are located in different planes, as a result, compared to the solution where they are located in a common plane, the axis of the shaft and the axis of the support rollers may take a smaller distance relative to each other, which entails preferably smaller structural size of the braking device. It is preferable, especially considering the limited structural space of braking devices on the site of a turning trucks rail vehicles. For example, the distance of the bearing shaft from the axis of the brake cylinder is greater than the distance between the reference roller bearings from the axis of the brake cylinder.

Preferably, if, at IU is e, one support roller mounted to rotate by means of pivot pins on the retaining ring movably mounted on the piston rod of the working cylinder coaxial with the axis of the brake cylinder and the linear movement guide ring is transmitted to the piston rod of the working cylinder. In particular, the linear movement guide ring is passed through the axial stress on the piston rod of the working cylinder, resulting in the action of the brake mechanism, such as the block slides.

Under load, the shaft is elastically deformed, causing the Cams get the skew angle, which would lead to an uneven load on the supporting rollers. So it is especially preferred if the snap ring is installed on the piston rod of the working cylinder, coaxially to the axis of the brake cylinder, with the possibility of movement, and emphasis is made, when viewed in the direction of the axis of the brake cylinder as a convex spherical thrust surface that interacts with located perpendicularly to the axis of the brake cylinder annular surface, and a convex spherical thrust surface and located perpendicular to the axis of the brake cylinder annular surface respectively performed either on the thrust ring, or on the piston rod of the working cylinder. This allows you anniversa the skew angle of Cams, while in this case located, for example, on the piston rod of a working cylinder having a gap on one axis of the thrust ring can become distorted with respect to the piston rod of the working cylinder or to the axis of the brake cylinder. In this case, the contact ring surface and a convex spherical executed resistant surface is, for example, essentially along at least one line, then forming a swinging support for the thrust ring.

According to an improved variant of execution of the body carrying at least one bearing shaft made as cylinder cover, axially closing the cavity, the spring operating brake cylinder accommodating a return spring supported, on the one hand, in the cylinder head, and, on the other hand, in the piston of the working cylinder. Consequently, the cylinder cover is bifunctional, allowing, on the one hand, removed the cylinder of a hydraulic brake actuator position to mount components such as the piston of the working cylinder, a return spring, etc. inside the cylinder of the hydraulic brake, and, on the other hand, to create a rotating support, at least for the shaft of the Parking brake device.

In this form the cover needle bearing is nick with the ability to be mounted outside in a through hole of the cylinder cover, at least one bearing shaft. In addition, the cylinder head can be performed also a support for Bowden cable, operate the control lever.

The details become more clear in the subsequent description of exemplary embodiment of invention.

The present invention is illustrated by drawings, which presents the following:

figure 1 is a side view of a combined service brake and Parking brake cylinder of a brake device of a rail vehicle according to a preferred variant implementation of the invention;

figure 2 - cylinder cover combined service brake and Parking brake cylinder of figure 1 with the components of the Parking brake device in disassembled form;

figure 3 is a vertical section of a combined service brake and Parking brake cylinder of figure 1 with Parking brake in the released position;

4 is a vertical section of a combined service brake and Parking brake cylinder of figure 1 with Parking brake in the clamping position;

5 is a horizontal section of a combined service brake and Parking brake cylinder of figure 1;

6 is a vertical section of a combined service brake and Parking brake cylinder of figure 1 according to another variant of execution.

Shown in figure 1 combined R is working and the Parking brake cylinder 1 is element of a brake device of a rail vehicle and actuates, for example, not shown in the drawing caliper with two not shown, passing essentially parallel to each other rockers calipers. Both rocker calipers are at its one end connected pivotally by means of bolts brake pads included preferably in frictional engagement with the circuit in the brake disk.

Between the other ends of the rocker arm caliper is combined work and Parking brake cylinder 1, a housing 2 which figure 1 is connected to the right side on one arm of the caliper and the piston 4 of the operating brake cylinder through the piston rod 6 of the piston of the working cylinder and the bracket 8 of the spindle with the other arm of the caliper.

In particular, the working brake cylinder 10 of the combined service brake and Parking brake cylinder 1 serves as an active working brakes and contains driven by the working fluid, the piston 4 of the working brake cylinder 4, which actuates through coaxial with the axis of the brake cylinder piston rod 6 of the piston of the working cylinder and bracket spindle 8 arm caliper, the load pressure or the discharge pressure of the piston 4 of the working brake cylinder is through ventilation and / or removal of air from the working of the brake chamber 14 inside the working brake cylinder 10 (Fig.3-5). Return rugina 16 pre-tighten as a compression spring piston 4 of the working brake cylinder 4 is shown in figure 3, in the drawing right in the depressed position.

The cover 18 of the cylinder closes the combined worker and Parking brake cylinder 1 along the axis on the end where the piston rod of the working cylinder comes out of it and where it is connected with the side of the end bracket 8 of the spindle. The sleeve seal 34 in the form of a bellows between the cover 18 of the cylinder and the bracket 8 spindle seals the through hole 32 in the outer side.

The rod 6 of the piston of the operating brake cylinder is held in a through hole 28 of the partition wall 30 which separates the cavity 26, the spring from the inner cavity of the cover 18 of the cylinder. In the cavity 26, the spring placed return spring 16, which is based, on the one hand, the partition 30, and, on the other hand, in the piston 4 of the working brake cylinder.

The Parking brake device is integrated into a combined work and Parking brake cylinder 1 or fulfilled in him. Preferably, if the components of the Parking brake device is installed or placed in the inner cavity of the cover 18 of the cylinder or in the cover 18 of the cylinder of the combined service brake and Parking brake cylinder 1. In particular, the Parking brake device is on the end of the end cap 18 of the cylinder mounted to rotate the lever 20 controls the rotational movement of which is prior to what is on located perpendicular to the axis 12 of the brake cylinder, through located in the cover 18 of the cylinder bearing shaft 22, mounted to rotate.

Preferably, if two bearings 22 shaft symmetrically and perpendicularly to the axis 12 of the brake cylinder and, for example, made in the lid 38 of the bearings with the possibility of installing outside through the through holes 36 of the cover 18 of the cylinder, as it follows from figure 2 and 5. In addition, the cover 18 of the cylinder is fixed to the holder is in the form of a retaining plug for 40 not shown in the drawing of the Bowden cable, operate the lever 20 of the control, as shown in figures 1 and 5.

Initiated through the cable of the Bowden rotational movement of the lever 20 control, and with it, also United with him resistant to rotation of the shaft 24 turns then through the Cam transmission in directed parallel to the axis 12 of the brake cylinder linear motion track rollers 42. Support rollers 42 mounted to rotate via the supporting roller bearing 44 is parallel to the shaft 24 of the axis 46 of rotation. Additionally, there are United resistant to rotate with the shaft 24 of the Cams 50 with work surfaces 52 of the Cam interacting during the course of clamping or course release the Parking brake device with radially outer surfaces 54 of the support roller support roller 42, and line d is iunie support roller 42 is transmitted to the rod 6 of the piston of the working cylinder. The following describes the Cam gear, which converts initiated through the lever 20 controls the rotational motion of the shaft 24 in a linear movement of the rod 4 of the piston of the working cylinder.

In particular, there are two Cam 50, placed symmetrically to the axis 12 of the brake cylinder, the United resistant to rotate with the shaft, and two support roller 42, interacting with Cams and also placed symmetrically to the axis 12 of the brake cylinder. Support rollers 42 are installed with the possibility of rotation coaxial with the axis 46 of rotation of the bearing pins 56, perpendicularly protruding from the retainer rings 58 and again directed perpendicular to the axis 12 of the brake cylinder.

The retaining ring 58 mounted on the rod 6 of the piston of the working cylinder coaxial to the axis of the brake cylinder 12 can move, and the linear movement guide ring 58 can be passed through the axial stop 60 on the rod 6 of the piston of the working cylinder, resulting then in the step bracket 8 of the spindle (figure 3-5) for clamping to the left, and for release to the right. Under option run for 3-5, the stop 60 of the thrust ring 58 made of, for example, as flat, located perpendicularly to the axis 12 of the brake cylinder annular surface, interacting for the axial transmission of force from a compatible, also perpendic the lar located to the axis 12 of the brake cylinder smooth annular surface of the piston rod 6 of the piston of the working cylinder.

The shaft 24 is elastically deformed under load, causing the Cams 50 receives the skew angle, leading to an uneven load on the supporting rollers 42. The skew angle Cam 50 can be eliminated through the implementation of the stop 60, the retainer rings 58 in the form of co, when viewed in the direction of the axis 12 of the brake cylinder, a convex spherical thrust surface 61 that communicates, for example, with smooth and located perpendicular to the axis 12 of the brake cylinder annular surface 63 of the piston rod 6 of the piston of the working cylinder, while then located on the rod 6 of the piston of the working cylinder on the same axis with a gap of snap ring 58 can become distorted with respect to the rod 6 of the piston of the working cylinder or to the axis 12 of the brake cylinder, as shown in Fig.6. The contact between the annular surface 63 and the convex spherical executed resistant surface 61 is in this case essentially along at least one line 65, forming then a swinging support for the thrust ring 58.

Then from the brackets 8 spindle movement of the clamp is transmitted to the corresponding arm of the carriage to cause movement of the clamping caliper where the brake pads come in a friction locked engagement with the brake disc, causing the Parking brake is C clamped.

If you look in the direction perpendicular to the axis 12 of the brake cylinder, the bearings of the shaft 22 and the support roller bearings 44 are offset to each other, as, in particular, can be seen in figure 5. Bearings shaft 22 and the support roller bearings 44 are preferably designed as rolling bearings, such as roller bearings. In particular, the bearings of the shaft 22 and the support roller bearings 44 are located in different planes 62, 64, and perpendicular to these planes 62, 64 is perpendicular to the axis 12 of the brake cylinder and the surface 62, 64 forms an essentially plane of symmetry relative to the roller to which it is perpendicular. In particular, the distance of the plane 62 of the bearings 22 shaft from the axis 12 of the brake cylinder is greater than the distance of the plane 64 of the supporting roller bearings 44 from the axis 12 of the brake cylinder.

Interacting with the radially outer surfaces of the rollers 54 of the support rollers 42 working surfaces of the Cams 52 are made, respectively, as a segment of a circle surface of the cylinder, in particular, as shown in figure 3 and 4. Under the segment of a circle surface 52 of the cylinder understand ongoing at a certain angle element bending imaginary full cylinder.

The Central axis 66 of this imaginary cylinder, as this mod is but you can see in figure 3, performs during the course of clamping or course release the Parking brake device of a circular trajectory 68 movement around the axis of the shaft 70 of the shaft 24. While working surface 52 of the Cam pawls 50 and the support rollers 42 are made or located so that there is a point 72 of intersection of this trajectory 68 movement with the axis 12 of the brake cylinder, and this point corresponds essentially to the maximum force of the Parking brake. This position of the elements is best illustrated in figure 4.

Particularly preferably, if the shaft 24 and the bearing rollers 42 are located so that in relation to all during clamping of the Parking brake device shown in figure 3 released position until it is shown on figure 4 position of the clamp, to the beginning of the stroke of the clamp (3) the distance b between the line 78 action efforts, continuing between the tangent 74 between the working surface 52 of the Cam and the surface of the support roller 54, on the one hand, and the axis of the shaft 70, on the other hand, acquires the maximum value. The greater this distance b between the line 78 action efforts and the axis of the shaft 70, the lower the gear ratio i, which receives the Cam gear in the result of the interaction of the working surface 52 of the Cam and the surface 54 of the support rollers.

In the clamped position according to figure 4, the line 78 steps Wuxi the Oia is located coaxially to the axis 12 of the brake cylinder, moreover, line 78 action efforts denotes the direction of the acting force between the working surface 52 of the Cam surface 54 of support rollers, as is also described above.

Indicated in figure 3 and 4 the distance and corresponds to an effective shoulder effort between the hinge connection of the Bowden cable with lever 20 management and the axis of the shaft 70 when the lever 20 control transmit a driving force through a Bowden cable.

Gear ratio i Cam send then receive from the corresponding distances or shoulders effort andand b (3 and 4):i=ab

While figure 3 shows the Parking brake device is in the released position, in which the radial outer surface of the support roller 54 or the surface of the perimeter of the support roller 42 is engaged with the one who turns away from the shaft 24 by the edge of the working surface 52 of the Cam. In this case, the shoulder b of maximum effort. In contrast, figure 4 shows the Parking brake device is in the clamping position, in which the shoulder b of the effort is minimal.

In other words, the gear ratio i of the lowest in the beginning of the stroke of the clamping or in the released position only when necessary to overcome the gap between the pads the brake pads and the corresponding p is Roy friction, and the shoulder b of maximum effort. Then the gear ratio i increases with increasing stroke of the clamp, including due to the fact that reduced leverage efforts or the interval b between the line 78 action efforts and the axle shaft 70. Therefore, with increasing efforts clamping increases the power ratio formed by the Cams 50 and the support rollers 42 of the Cam gear. Consequently, by the beginning of the stroke of the clamping receive a relatively small clamping force when it is necessary only to overcome the gap, and by the end of the stroke of the clamping high clamping force, when should act the maximum force of the Parking brake.

1. Brake device of a rail vehicle containing at least one working cylinder (10), at least one is driven by the working fluid by the piston (4) of operating brake cylinder, resulting in action coaxially with the axis (12) of the brake cylinder piston rod (6) of the piston of the working cylinder, and with the Parking brake device is installed with the possibility of rotation of the lever (20) to control the rotational movement which is transmitted to the shaft (24), mounted with a possibility of rotation perpendicular to the axis (12) of the brake cylinder, least through the bearing (22) of the shaft in the housing (18)and the lever (20) management is destined is Achin to initiate movement of the rotation shaft (24), which is converted into directed parallel to the axis (12) of the brake cylinder linear motion, at least one set can be rotated by the supporting roller bearing (44) located parallel to the shaft (24) axis (76) of rotation of the support roller (42) via at least one Cam (50)connected to the detent from rotating with the shaft (24), with the specified Cam has a working surface (52)that interact during the course of clamping or course release the Parking brake device with a radially outer surface (54) support roller (42), and the linear movement of the support roller (42) is transmitted to the shaft (6) of the piston of the working cylinder, wherein the working surface (52) of the Cam is made in the form of a segment of a circle surface of the cylinder, the Central axis (66) which, during the course of clamping or course release the Parking brake device performs a circular trajectory (68) movement around the axis (70) of the shaft (24), and at the point (72) of intersection of the trajectory (68) movement with the axis (12) of the brake cylinder occurs essentially the maximum force of the Parking brake.

2. The brake device according to claim 1, characterized in that the shaft (24) and at least one support roller (42), arranged so that the entire stroke of the clamp, at the beginning of houseimage, the distance (b) between the line (78) of the force, continuing, on the one hand, between the tangent (74), between the working surface (52) of the Cam surface (54) of the support rollers, on the one hand, and the axle (76) support rollers, on the other hand, and the axis (70) of the shaft has a maximum value.

3. The brake device according to claim 1 or 2, characterized in that it comprises two Cam (50), placed symmetrically to the axis (12) of the brake cylinder connected to the fixation against rotation with the shaft (24), as well as interacting with Cams (50) and arranged symmetrically to the axis (12) of the brake cylinder support roller (42).

4. Braking device according to claim 3, characterized in that it comprises at least two bearings (22) of the shaft, symmetrically to the axis (12) of the brake cylinder, and, when viewed in the direction perpendicular to the axis of the brake cylinder, the bearings (22) of the shaft and the bearing roller bearings (44) are arranged offset to each other.

5. Braking device according to claim 4, characterized in that the distance of the bearing (22) of the shaft from the axis (12) of the brake cylinder is larger than the distance between the reference roller bearings (44) from the axis (12) of the brake cylinder.

6. The brake device according to claim 1 or 2, characterized in that the at least one support roller (42) is mounted can be rotated by means of the pivot pin (56) on the resistant to lice (58), established with the ability to move on the rod (6) of the piston of the working cylinder coaxial with the axis (12) of the brake cylinder and the linear movement guide ring (58) is transmitted to the shaft (6) of the piston of the working cylinder.

7. Braking device according to claim 6, characterized in that the retaining ring (58) is installed on the rod (6) of the piston of the working cylinder, coaxially to the axis of the brake cylinder and can move, and the emphasis is made, when viewed in the direction of the axis (12) of the brake cylinder, in the form of a convex spherical thrust surface (61), interacting with located perpendicularly to the axis (12) of the brake cylinder annular surface (63), and a convex spherical thrust surface (61) and located perpendicular to the axis (12) of the brake cylinder annular surface (63) accordingly performed, or on the thrust ring (58)or the stem (6) of the piston of the working cylinder.

8. The brake device according to claim 1 or 2, characterized in that the rod (6) of the piston of the working cylinder is designed to actuate the braking mechanism.

9. The brake device according to claim 1 or 2, characterized in that the housing (18)carrying at least one bearing (22) of the shaft, made in the form of a cover of the cylinder, axially closing the cavity (26), the spring of the working brake cylinder is a (10), containing a return spring (26), based, on the one hand, in the cover (18) of the cylinder, and, on the other hand, in the piston (4) of operating brake cylinder.

10. Braking device according to claim 9, characterized in that the cover (18) of the cylinder is made bearing (40) cable of the Bowden intended for actuation of the lever (20) of the control.

11. Braking device according to claim 9, characterized in that it comprises a cover (38) bearing, is arranged to be mounted outside in the through hole (36) of the cover (18) of the cylinder, at least one bearing (22) of the shaft.

12. The brake device according to claim 1 or 2, characterized in that at least one bearing (22) of the shaft and at least one supporting roller bearing (44) is made in the form of rolling bearings.

13. The brake device according to claim 1 or 2, characterized in that it is made in the form of node caliper disk brake of a rail vehicle.



 

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24 cl, 1 dwg

FIELD: transport.

SUBSTANCE: invention relates to machine building, particularly, to combine brake cylinders. Combined brake cylinder comprises cylinder of working braking mechanism, an active working brake, driven by working fluid displaced by piston and braking mechanism cylinder with spring energy accumulator, a passive parking brake. Piston of aforesaid braking mechanism cylinder with spring energy accumulator and rod of cylinder of working braking mechanism piston are aligned. In case piston stroke in aforesaid braking mechanism cylinder with spring energy accumulator increases power transfer ratio increases as well. Rail mounted vehicle disc type braking mechanism support unit incorporates said combined braking cylinder.

EFFECT: compact design, maximised force of braking.

25 cl, 15 dwg

FIELD: transport.

SUBSTANCE: invention relates to rolling stock brake systems. Disc brake comprises friction unit. Friction unit is composed of radial double-row thrust bearing with medium ring making the brake disc rigidly fitted on mounted axle while two thrust rings make linings. Said linings are pressed to medium ring by levers coupled with brake cylinder. Outer surface of medium ring and inner surfaces of thrust rings have taper grooves to accommodate the balls.

EFFECT: reduced thermal load and wear of disc brake friction pair.

4 dwg

FIELD: machine building.

SUBSTANCE: proposed device comprises two levers arranged on opposed outer surfaces of casing and system of seals. Brake caliper levers are driven eccentrically by crank. Crank is fitted on eccentric shaft end side. Seal between casing and lever represents tight seal and comprises partially elastic bellow secured to case on one side, and, on opposite side, to brake caliper lever.

EFFECT: improved operating performances.

10 cl, 3 dwg

FIELD: transportation.

SUBSTANCE: rod automatic lock is made up of two wedge-type grip and two air-operated lock grip drives made as two independent air operated dual-action cylinders with pistons and springs to control locking grips. To be manually controlled, the automatic lock is furnished with a manual drive consisting of the L-shaped grips and a lever with a stop arranged on the gripping device housing so as to manually lock the drive in three positions.

EFFECT: automatic locking of the brake cylinder rod allowing releasing the lock from fixed braking position and locking the drive in three positions.

3 dwg

FIELD: rail way transport; train parking brakes.

SUBSTANCE: proposed automatic mechanical parking brake contains special flexible member in form of spring with static deflection of 20 mm under action of maximum brake pressure, rack-type lock of brake cylinder rod with wedge clamp and pneumatic drive, valve-type pressure regulator and two three-way air cocks. Said flexible member is located between rod of brake cylinder piston and brake rack train. Pneumatic drive includes two racks fastened to rod of brake cylinder, two wedge clamps with pressure shafts provided with tooth cut similar to teeth of racks, two pneumatic drives in form of double-acting pneumatic cylinders with pistons and springs. Valve-type pressure regulator of shutoff and control valve consists of rubber valve attached to rubber diaphragm, guide bushing, adjusting spring, pressure rod, housing consisting of two parts with flanged joint and thread on upper part of housing, adjusting cover with thread, valve seat in lower part of housing with supply air line and four outgoing axial air channels.

EFFECT: improved reliability of rail vehicle parking brake.

1 dwg

FIELD: railway transport; parking brake locks.

SUBSTANCE: proposed automatic mechanical lock of brake cylinder rod contains clamping device, two pneumatic drives of stop clamps. Two racks with gear cut are attached to rod of brake cylinder from two side diametrically opposite relative to longitudinal axis. Each pressure shaft of stop wedge clamps consists of two halves arranged in housing and engaging along inclined plane. One half of pressure shaft is provided with gear cut similar to that of rod rack for displacement under pressure of pneumatic drive piston rod at locking along axis of brake cylinder rod getting into complete engagement with teeth of rack of brake cylinder, thus reliably holding it in brake-applied position. Other half of pressure shaft plays the part of wedge at locking the brake cylinder rod in brake-applied position holding gear half of pressure shaft in engagement with rod rack.

EFFECT: improved reliability of locking of brake cylinder rod, simplified design and reduced overall dimensions of lock.

1 dwg

FIELD: railway transport; parking brakes.

SUBSTANCE: proposed parking brake with adjustable brake pressure and remote manual control is provided with locking device in form of rubberized-metal air chamber of brake cylinder and shutoff valve for holding brake leverage in brake applied position, change-over valve to change air delivery from brake cylinder to rubberized-metal air chamber through shutoff valve and brake valve for manual application of brakes. Housing of change-over valve and brake valve are made in form of double-acting pneumatic cylinders with spool-type pistons having two extreme, namely, upper and lower, stable fixed position. Two brake valves are manually remote controlled through pneumatic circuit of parking brake. Similar valve-type pressure regulators are installed on change-over valve and shutoff valve. Seats of valve in lower part of housing are provided with inlet air channel and four outlet axial air channels. One three-way and four disconnecting air cocks are designed for functional changing over of parking brake.

EFFECT: improved reliability of brake.

1 dwg

FIELD: railway transport.

SUBSTANCE: proposed mechanical lock of brake cylinder rod contains brake cylinder rod with cylindrical insert with wedge-like cutout in zone where insert engages with pressure strips to prevent slipping of brake cylinder rod I fixed position. Stop clamping device is made in from of two clamps of self-braking multistep drives-motion converters to prevent separation of clamp under action of elastic forces of brake leverage and release spring of piston of brake cylinder in fixed position. To realize maximum possible force of clamps, their longitudinal axes are arranged square to spaces of wedge-like cutouts of insert and at acute angle to longitudinal axis of rod. Pneumatic drive is made in from of two individual double-acting pneumatic cylinders with possibility of use of air from main line of brake cylinder at braking for additional, drive apart from cylinder spring to provide clamp of rod of brake cylinder in brake-applied position and it is designed for fitting mechanical lock of brake cylinder rod onto brake cylinders of any type cars and locomotives.

EFFECT: improved fixing of brake cylinder rod.

1 dwg

The invention relates to brake systems of hardware, mainly vehicles, namely, automatic Parking brakes of railway rolling stock

The invention relates to the field of railway transport, namely to the Parking brakes of the rolling stock

The invention relates to brakes of railway rolling stock

The invention relates to the construction of a pneumatic actuator of the automatic Parking brake of a rail vehicle

FIELD: railway transport.

SUBSTANCE: proposed mechanical lock of brake cylinder rod contains brake cylinder rod with cylindrical insert with wedge-like cutout in zone where insert engages with pressure strips to prevent slipping of brake cylinder rod I fixed position. Stop clamping device is made in from of two clamps of self-braking multistep drives-motion converters to prevent separation of clamp under action of elastic forces of brake leverage and release spring of piston of brake cylinder in fixed position. To realize maximum possible force of clamps, their longitudinal axes are arranged square to spaces of wedge-like cutouts of insert and at acute angle to longitudinal axis of rod. Pneumatic drive is made in from of two individual double-acting pneumatic cylinders with possibility of use of air from main line of brake cylinder at braking for additional, drive apart from cylinder spring to provide clamp of rod of brake cylinder in brake-applied position and it is designed for fitting mechanical lock of brake cylinder rod onto brake cylinders of any type cars and locomotives.

EFFECT: improved fixing of brake cylinder rod.

1 dwg

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