Hydraulic telescopic twin-tube damper suspension vehicle

 

(57) Abstract:

The invention relates to transport machinery and can be used in suspended devices of vehicles. The product consists of a tank with an eye, a cylinder with a piston having a throttle hole, reverse and discharge valves, rods, manufactured valve with the inlet valve guide with throttle opening, a fixed nut in the tank. The unloading valve is made in the form of a resilient disk bilateral actions: during the stretching opens the flow of fluid between the stop rod and drive around the perimeter of the hole, and on the compression between the stop of the piston and the disk on the outer perimeter, which simplifies the design of the hydraulic telescopic twin-tube damper suspension and increases the efficiency of the unloading valve at high speeds and frequencies of oscillation of the piston in the cylinder, and also creates the initial resistance. 2 C.p. f-crystals, 3 ill.

The invention relates to transport machinery and can be used in suspended devices of vehicles.

Known hydraulic telescopic twin-tube dampers (hereinafter hydrogengas structures. - M.: mechanical engineering, 1968), contains a reservoir with an eye, inside a cylinder with inlet and discharge valve stroke of the compression piston with bypass and relief valve of the progress of stretching and rod with eyelet passing through the guide that covers the cylinder and secured in the tank.

The drawback of such hydraulic dampers is the complexity of the design due to the need for the installation of four types of valves of various designs: the inlet, overflow, discharge strokes of compression and tension.

Known hydraulic telescopic twin-tube damper suspension of the vehicle. C. the USSR N 931503, class B 60 G 13/08, 1982) adopted for the prototype, containing a reservoir with an eye and an inlet valve located therein a cylinder with a piston and a rod passing through the guide that covers the cylinder and secured in the tank, the throttle hole course stretching in the guide and tube, connecting rod cylinder chamber with the cavity of the tank. In the piston are the throttle bore stroke compression with non-return valve and the discharge valve strokes of compression and tension.

The disadvantage of this design of hydraulic dampers is the need from the Atiyah complicates the design of the piston. Given the workflow diagram the need for increased flow sections for the unloading valve compression stroke, the piston requires a parallel installation of two discharge valve discharge valve stroke stretching in a similar design. Usually the same design and has a non-return valve stroke compression ratio. Thus, in the piston are four valves, consisting of 20-24 details.

The technical result of the invention is to simplify the design of hydraulic dampers and improving the efficiency of the unloading valve at high speeds and frequencies of oscillation of the piston in the cylinder, and the creation of the initial resistance.

This technical result is achieved by the fact that hydraulic telescopic twin-tube damper suspension of a vehicle, containing a reservoir with an eye, inside a cylinder with a piston and a rod passing through the guide that covers the cylinder and secured by a nut in the tank, the inlet valve with the intake channel in the reservoir, the orifice in the guide and tube, connecting rod cylinder chamber with the annular cavity of the reservoir, the orifice in the piston with the opposite Klah is an elastic disk, deformirovannogo between focusing on the rod and the ledge of the piston for providing fluid flow at a stretch through the opening gap between the emphasis on stem and disk, and during the compression between the first piston and the disk, the hole in the guide has a valve with a spring and connected with a straight outlet tube located on the diametrically opposite side, through an annular groove in the guide, condensed ring on the tank, a check valve in the piston has a spring and nut tank has a conical bore and interacting with her lantern ring for mounting rail in the tank.

In Fig.1 presents the proposed product in the context of Fig.2 and 3 versions, respectively, of the guide rod with a straight outlet tube and piston hydraulic dampers.

The product consists of a tank 1 (Fig.1) clevis, cylinder 2, which moves the piston 3 with the rod 4 passing through the guide 5 seal 6. Guide 5 is fixed in the tank 1 by a nut 7. In the lower part of the tank 1 is the inlet valve 6 with the intake channel 9 of the annular cavity 10 of the tank 1.

In the guide 5 is made of a throttle hole 11,United with the annular cavity 10 of the tank 1 curved outlet tube 12 to output a flowing stream of fluid under the liquid level, located in the tank, the tilt of the hydraulic dampers from vertical to horizontal position. The piston 3 has a check valve 13, the orifice 14 which sets the initial speed branch of the resistance characteristics of the hydraulic dampers on the compression. To limit the resistance forces of the hydraulic dampers on the moves of compression and tension in the piston 3 has a discharge valve 15 bilateral actions. By opening the discharge valve 15 is centered on the spacer 16 having through channels for flow of fluid from the rod end 17 of the cylinder 2 and piston cavity 18 through the holes in the piston 3, and rests on the stop 19 of the rod 4. On the outer contour of the discharge valve 15 rests on the ledge of the piston 3. The initial force of the opening of the discharge valve 15 is determined by its pre-deformation provided by tightening the nut 20 of the mounting of the piston 3. For more precise control of the initial force open the discharge valve 15 on the spacer 16 are regulatory washer 33, which allows you to adjust the preload of the discharge valve 15, and hence the effect of viscous resistance of hydraulic dampers in the ducts tension - compression. On the upper end of the rod 4 is fixed is the emotional hole 11 stroke stretch fitted with a valve 23 with the spring 24. Instead of the curved outlet tube in the guide 5 is made annular groove 25, connected to the throttle bore 11 and compacted within the reservoir 1 by a ring 26, through which the drainage of the liquid in the cavity 10 of the tank goes through a straight outlet tube 27, is fixed in the guide 5 from the diametrically opposite side from the throttle hole 11. In Fig.2 mount the guide rail 5 in the tank 1 is carried out by the nut 7 with a tapered bore through the spacer ring 28, through which the guide 5 is uniformly pressed against the end face of the cylinder 2, compensating for inaccuracies of manufacture of the mating parts. The washer 29 is used to ensure the tightness of the sealing ring 30 in the groove of the guide 5.

In the embodiment, the piston 3 hydraulic dampers (Fig.3) in the check valve 13 of the throttle openings 14 led spring 31.

The product works as follows. In the course of the stretching fluid from the rod end 17 (Fig.1) throttled through the orifice 11 and through curved around a cylinder 2 the outlet tube 12 is displayed below the level of the liquid in the annular cavity 10 of the tank 1, to exclude its foaming with air left in the cavity 10 during Assembly. Thanks dies air, remaining in the working cavity 17 of the cylinder 2, is displayed in the cavity 10 of the tank 1 at its location on the vehicle from the vertical position to a horizontal arc 32.

The inlet valve 8 at this time is open, and the fluid from the cavity 10 through the supply channel 9 unilateral location enters the piston cavity 18. The increase in fluid pressure in the rod end 17 at a high speed of movement of the piston 3 in the cylinder 2 is limited to the relief valve 15, which under the action of pressure additionally deforms and opens the annular gap between the stop 19 of the rod 4 and the discharge valve 15. Liquid feedthrough channels in the spacer 16 and through the holes in the piston 3 flows into the piston cavity 18.

During compression the fluid from the piston cavity 18 is choked through the orifice 14 of the check valve 13 in the rod cavity 17. The inlet valve 8 is closed at this. Due to the input shaft 4 in the cylinder 2 a small amount of liquid equal to the volume of the input shaft continues to grossulariata turn the orifice 11 from the rod end 17 through the outlet tube 12 in the annular cavity 10 of the tank 1. In the rod end 17 develops a slight excess pressure, the speed of movement of the piston 3 in the cylinder 2 is also restricted by the relief valve 15, which under the action of pressure difference in podpornoy cavity 18 and the rod end 17 additional bends and opens the annular gap between the ledge of the piston 3 and the discharge valve 15. Liquid through the openings in the piston 3 and the annular gap flows into the rod cavity 17.

Thus, in the proposed product discharge valve 15 in the form of a resilient disk provides two-way action: during the stretching opens the flow of fluid between the stop rod 19 and the discharge valve 15 on the perimeter of the hole during compression between the ledge of the piston 3 and the discharge valve 15 on the outer perimeter. Due to the absence of the inlet holes and large perimeters opening slits is provided by the high efficiency discharge valve double-acting with increasing velocity of the piston, and since the amount of the additional deformation of the disk is small, due to the small inertia of the deformable part of the disk retains its effectiveness at high frequencies of oscillation of the piston in the cylinder, which allows you to apply the product in terms of high-frequency mode of operation of suspension systems of vehicles, for example, bolster stages of the RES is in the vehicle, for example, body-stage spring suspension rolling stock, require the introduction of initial resistance (friction) to stabilize the position of the body. In this case you use versions of hydraulic dampers in which the check valve 13 (Fig.3) is preloaded by the spring 31, and the throttle hole 11 (Fig.2) is blocked by a valve 23 with the spring 24.

The opening of the throttle holes occurs after the initial pressure, i.e., the initial resistance.

1. Hydraulic telescopic twin-tube damper suspension of the vehicle (hereinafter the product) containing reservoir with an eye, inside a cylinder with a piston and a rod passing through the guide that covers the cylinder and secured by a nut in the tank, the inlet valve with the intake channel in the reservoir, the orifice in the guide and tube, connecting rod cylinder chamber with the annular cavity of the reservoir, the orifice in the piston with a check valve connecting the piston cavity of the cylinder with the rod, and the unloading valve in the piston, characterized in that the discharge valve is made in the form of a resilient disk, deformirovannogo between focusing on the rod ohms on the stem and disc, and during the compression between the ledge of the piston and the disc, guide is made in annular groove, coupled with a tube and a throttle bore in the guide and compacted ring in the bore of the tank, and the said tube is made straight and fixed in the guide with the diametrically opposite side from the specified throttle holes in the rail.

2. The product under item 1, characterized in that the hole in the guide provided with a valve spring, and valve throttle openings of the piston, put a spring.

3. It is used for PP.1 and 2, characterized in that the nut for fastening the guide in the tank is made with a conical bore and is interacting with her lantern ring.

 

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