CN2177836Y

CN2177836Y - Butterfly valve piston for vibration damper

Info

Publication number: CN2177836Y
Application number: CN 93228755
Authority: CN
Inventors: 赵清洁; 许仁强
Original assignee: WANDE VIBRATION DAMPER CO Ltd
Current assignee: WANDE VIBRATION DAMPER CO Ltd
Priority date: 1993-07-12
Filing date: 1993-07-12
Publication date: 1994-09-21
Anticipated expiration: 2003-07-12

Abstract

The utility model discloses a butterfly valve piston for a vibration damper, which comprises a piston body, a flow through hole processed on the piston body, and a piston rod installed on the piston body. The utility model is characterized in that the upper and the lower surfaces all have annular steps. The upper and the lower surfaces of the flow through hole all have butterfly elastic valves. The piston rod is sheathed with a press plate and a nut, and the side of the piston body is provided with a damping hole. The utility model can be arranged on various motor vehicles to have the damping effect.

Description

Butterfly valve piston for vibration damper

The utility model belongs to damping device, relates to a kind of vibration damper dish valve block piston.

Vibration damper is the essential a kind of device of Motor Vehicle, and the piston in the vibration damper is the core component of vibration damper, and its effect is to transfer the mechanical energy that Motor Vehicle shakes to the hydraulic pressure energy, to decay its amplitude, protection people and vehicle.The piston of existing vibration damper is at valve block of the Kong Shangan of piston, and spring in top on valve block is pressed an adjusting nut on spring, lean on the pressure of nut to make spring withstand valve block, and when overpressure, highly pressurised liquid will back down valve block and pressure release.Because the discrete performance of spring is big, and spring gives pressure and is difficult to be controlled in a certain predetermined range, so that the speed characteristics randomness of vibration damper is very big, influence its performance, manufacturing process complexity in addition, cost is also high.

The purpose of this utility model is to overcome shortcoming of the prior art, and the vibration damper dish valve block piston of a kind of simple in structure, reliable performance, damping sensitivity is provided.

For achieving the above object, the utility model adopts a piston body, and the upper and lower surface of piston body all is processed with ring-shaped step; On piston body, also be processed with through flow hole, at all flexible valve block in the upper and lower surface of through flow hole; At the valve body middle part piston rod is arranged, pressing plate and nut are housed, damping hole is arranged in the piston body side at upper cover of piston rod.

The utility model has the advantages that simple in structure, damping performance good, the speed characteristics of vibration damper stably are controlled in the claimed range, improves the performance of vibration damper.

Fig. 1 is a plan view of the present utility model;

Fig. 2 is a plan view of the present utility model;

Fig. 3 is the A-A sectional view of the utility model Fig. 1.

Describe in detail below in conjunction with accompanying drawing.

The utility model has a piston body 4, upper surface and lower surface at piston body 4 all process ring-shaped step, on two concentric circumferences, be processed with through

flow hole

4B and 4C, wherein the upper surface at through flow hole 4C is connected together by an annular groove 4C ', on the step of through flow hole 4B and through flow hole 4C and piston body formation, all be placed with and be with flexible

annular preform

3 and 5, at the piston body middle part piston rod 1 is arranged, piston rod 1 lower end is processed with screw thread, and a nut 6 is installed, on piston rod 1, also be set with a pressing plate 2, on pressing plate 2, be processed with discharge orifice.Be processed with at least one damping hole 4A in the piston body side, the damping hole diameter is between 0.2～3 millimeter.During use, at first swivel nut 6, drive pressing plate 2 by piston rod, with upper and lower two

valve blocks

3 and 5 compressing distortion, form two dish-shaped valve blocks, also can directly valve block 3 and pressing plate of 5 usefulness directly be rivetted on piston body, make it to form dish-shaped valve block without nut.Because the elastic force of dish-shaped valve block is only determined by the height difference of its material, thickness, quantity and step surface, and with the pressure independent of nut and pressing plate, so, its elasticity is more stable, when Motor Vehicle vibrates, piston body will upper and lowerly move, when piston body moves downwards in cylinder body, a part of liquid of inferior part of the cylinder block is compressed, pressure raises, and at this moment a part of liquid produces a buffer function from the damping hole earial drainage of piston body side to piston rod, when being compressed fluid pressure in the cylinder body when being elevated to certain value, can back down dish-shaped valve block 3 and earial drainage; When piston during to swivel motion, valve block 3 is closed, during proper functioning, part liquid can be directly from hole 4A earial drainage, and when pressure was elevated to certain value, highly pressurised liquid backed down dish-shaped valve block 5, directly earial drainage so just can guarantee that cylinder interior pressure remains within the limited field.

Claims

1, a kind of vibration damper dish valve block piston comprises piston body, and the through flow hole that processes on piston body is installed in the piston rod on the piston body; It is characterized in that ring-shaped step all being arranged on the upper and lower surface of piston body; At all flexible valve block in the upper and lower surface of through flow hole; At upper cover of piston rod pressing plate and nut are housed; In the piston body side damping hole is arranged.