CN210461508U - Pistons, Piston Assemblies and Shock Absorbers - Google Patents

Abstract

The utility model discloses a piston, a piston assembly and a shock absorber, wherein the piston comprises a base body part, and a forward flowing hole and a reverse flowing hole are formed on the base body part; the outlet position of the forward flowing hole and the outlet position of the reverse flowing hole are respectively provided with a compression valve and a rebound valve; the compression valve and the rebound valve are respectively abutted against both side end faces of the base body portion, at least the former of the compression valve and the rebound valve is movable in the axial direction relative to the base body portion and is pressed by a spring. The utility model discloses a piston, piston assembly and bumper shock absorber have additionally added the spring to at least one check valve door amount, because the stable and rigidity of spring stiffness calculates easily for the performance of the check valve who has added the spring is controlled easily, from this in the design can accomplish comparatively accurately to whole piston, piston assembly and even the performance control of bumper shock absorber, can make things convenient for the timing to the softness and hardness degree of bumper shock absorber.

Description

Piston, piston assembly and shock absorber

Technical Field

The utility model relates to a bumper shock absorber technical field especially relates to a piston, piston assembly and bumper shock absorber.

Background

In order to quickly attenuate the vibration of a frame and a vehicle body and improve the smoothness and comfort of the running of an automobile, a shock absorber is generally arranged on an automobile suspension system; in addition to spring dampers, fluid medium-based dampers are also beginning to be widely used in current automobiles, such as nitrogen-based dampers, oil medium-based dampers, etc.; the working principle of the shock absorber based on the fluid medium is that the shock absorber comprises a medium cylinder and a piston, the piston divides the medium cylinder into two medium cavities, the piston is provided with two-way flow holes for the medium to flow, one-way valves (shown in figure 1) are arranged on the piston corresponding to the flow holes in each direction, and the flowing medium in the two medium cavities can realize circulation by opening the one-way valves. The one-way valve on the piston of the existing shock absorber based on fluid medium is composed of multiple layers of valve plates, the elasticity of the deformation of the valve plates is difficult to quantify, the valve is not controlled accurately enough, and the hardness degree of the shock absorber is difficult to adjust.

SUMMERY OF THE UTILITY MODEL

Utility model purpose: in order to overcome the not enough of existence among the prior art, the utility model provides a piston, piston assembly and bumper shock absorber aims at making the elasticity of the check valve on the piston comparatively easy quantization for it is comparatively accurate to the performance control of valve and even whole bumper shock absorber.

The technical scheme is as follows: in order to achieve the above object, the piston of the present invention comprises a base body, wherein the base body is provided with a forward flow hole and a reverse flow hole; the outlet position of the forward flowing hole and the outlet position of the reverse flowing hole are respectively provided with a compression valve and a rebound valve; the compression valve and the rebound valve are respectively abutted against both side end faces of the base body portion, at least the former of the compression valve and the rebound valve is movable in the axial direction relative to the base body portion and is pressed by a spring.

Further, the compression valve is pressed by a spring; the rebound valve is pressed by a pressing member fixed relative to the base body portion, and the rebound valve itself is elastically deformable.

Further, the compression valve further comprises a connecting piece fixed relative to the base body part, wherein one end of the spring is abutted against the connecting piece, and the other end of the spring is abutted against the compression valve.

Further, the rebound valve is formed by stacking a plurality of first valve plates, and the outer dimension of each first valve plate is gradually reduced in the direction away from the base body part.

Further, the compression valve is formed by stacking a plurality of second valve plates, and the outer dimension of the second valve plates is gradually reduced in the direction away from the base body part.

The piston assembly comprises the piston and a piston rod, wherein one end of the piston rod penetrates through the piston, and the piston rod are fixed relatively; the piston rod is internally provided with a medium channel communicated with the two ends of the piston, and the effective conduction area of the medium channel is adjustable.

Further, the medium passage includes a first passage extending in an axial direction from an end of the piston rod and a second passage extending in a radial direction; the first channel is communicated with the second channel, and a top plug capable of adjusting the position along the axial direction of the piston rod is arranged at the crossing position of the first channel and the second channel.

Furthermore, one end of the piston rod, which is far away from the piston, is provided with an adjusting rotating shaft, the adjusting rotating shaft is rotatably installed relative to the piston rod, and the adjusting rotating shaft is provided with an eccentric part which can directly or indirectly act on the top plug.

Furthermore, a knob is fixed at one end of the adjusting rotary shaft.

The shock absorber comprises the piston assembly and a medium cylinder, wherein the piston of the piston assembly is arranged in the medium cylinder and divides the medium cylinder into an upper medium cavity and a lower medium cavity; and one end of the piston rod, which is far away from the piston, extends out of the medium cylinder.

Has the advantages that: the utility model discloses a piston, piston assembly and bumper shock absorber have additionally added the spring to at least one check valve door amount, because the stable and rigidity of spring stiffness calculates easily for the performance of the check valve who has added the spring is controlled easily, from this in the design can accomplish comparatively accurately to whole piston, piston assembly and even the performance control of bumper shock absorber, can make things convenient for the timing to the softness and hardness degree of bumper shock absorber.

Drawings

Fig. 1 is a structural view of a piston of a conventional shock absorber;

fig. 2 is a first view structural diagram of a piston according to an embodiment of the present invention;

fig. 3 is a second view structural diagram of a piston according to an embodiment of the present invention;

fig. 4 is a cross-sectional view of a piston according to an embodiment of the present invention;

FIG. 5 is an external view of a piston assembly according to an embodiment of the present invention;

fig. 6 is a cross-sectional view of a piston assembly in accordance with an embodiment of the present invention;

FIG. 7 is a structural diagram of a shock absorber according to an embodiment of the present invention;

FIG. 8 is a partial cross-sectional view of a piston assembly in another embodiment.

The names of the parts indicated by the reference numerals in the drawings are as follows:

100-a piston; 110-a base portion; 111-forward flow holes; 112-reverse flow orifice; 120-a connector; 121-an axial extension; 130-a compression valve; 131-a second valve plate; 140-a rebound valve; 141-a first valve plate; 150-a spring; 160-a hold down; 170 — a first collar; 180-a second retainer ring; 200-a piston rod; 210-a media channel; 211 — a first channel; 212-a second channel; 310-top plug; 320-adjusting the rotating shaft; 321-an eccentric portion; 330-knob; 340-a mandril; 400-medium cylinder; 500-medium chamber.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

The piston 100 shown in fig. 1 includes a base body portion 110, and the base body portion 110 is provided with a forward flow hole 111 and a reverse flow hole 112; the outlet positions of the forward flow hole 111 and the reverse flow hole 112 are respectively provided with a compression valve 130 and a rebound valve 140, and the compression valve 130 and the rebound valve 140 are both one-way valves, and the opening directions of the two are opposite. When the flow of the fluid medium along the forward flow hole 111 may blow the compression valve 130 open into the other side of the piston, the rebound valve 140 will not open because the flow direction of the fluid medium is opposite to the openable direction of the rebound valve 140; when the fluid medium flows along the reverse flow hole 112, it is possible to blow the rebound valve 140 open into the other side of the piston, at which time the compression valve 130 does not open because the flow direction of the fluid medium is opposite to the openable direction of the compression valve 130; the compression valve 130 is pressed by a spring 150, or a spring 150 is additionally provided for each of the two compression valves 130, and the springs 150 respectively press the compression valve 130 against the rebound valve 140.

In this embodiment, only the compression valve 130 is pressed by the spring 150 and abuts against one side end surface of the base portion 110, and the compression valve 130 can move in the axial direction of the piston 100 in a translational manner; the rebound valve 140 is pressed against the other side end surface of the base body portion 110 by a pressing member 160 fixed with respect to the base body portion 110, and the rebound valve 140 itself is elastically deformable. In this embodiment, the rebound valve 140 is formed by stacking a plurality of first valve plates 141, and the first valve plates 141 gradually decrease in size in a direction away from the base portion 110. Thus, for the shock absorber using the piston 100, the controllability of flushing the compression valve 130 by the fluid medium is high in the compression stroke, and the rigidity of the spring 150 is stable and easy to quantify, so that the opening degree and the effective flow area of the compression valve 130 under different impact forces of the fluid medium can be calculated conveniently, the performance of the shock absorber can be quantified conveniently, and the hardness of the shock absorber can be adjusted easily. Because the controllability requirement for the shock absorber in the rebound stroke is low, the rebound valve 140 still adopts a common multilayer valve plate type one-way valve body.

In order to facilitate the use of the spring 150, the spring device further includes a connecting member 120 fixed to the base portion 110, one end of the spring 150 abuts against the connecting member 120, and the other end abuts against the compression valve 130, and both the base portion 110 and the connecting member 120 are fixed to each other in the axial direction of the base portion 110.

Optionally, the compression valve 130 is formed by stacking a plurality of second valve plates 131, and the second valve plates 131 gradually decrease in size in a direction away from the base portion 110. Thus, the compression valve 130 itself has a certain elasticity, which is a great advantage for its shock resistance, and when the shock absorber carrying the piston 100 is subjected to a large impact force, the efficiency of opening the compression valve 130 to a proper flux is improved due to the elasticity of the compression valve 130 itself.

The invention also discloses a piston assembly, which comprises the piston 100 and a piston rod 200, wherein one end of the piston rod 200 penetrates through the piston 100, and the piston rod and the piston 100 are fixed relatively; a medium channel 210 communicating with both ends of the piston 100 is formed in the piston rod 200, and an effective conduction area of the medium channel 210 is adjustable.

The base portion 110 and the link 120 included in the piston 100 are fixed in position in the axial direction of the piston rod 200. As shown in fig. 3 and fig. 4, in an embodiment, the lower end of the connecting member 120 abuts against a shoulder on the piston rod 200, the upper end of the connecting member 120 has an axial extension 121, the lower end of the base body 110 abuts against the axial extension 121, and the upper end of the base body 110 is pressed by the pressing member 160, where the pressing member 160 is a nut screwed on the piston rod 200. As shown in fig. 8, in the second embodiment, the connecting member 120 is a disc, the lower end of the connecting member 120 abuts against the shoulder of the piston rod 200, and the upper end of the connecting member 120 is limited by the first retaining ring 170 fixed on the piston rod 200; the lower end of the base portion 110 abuts against the second retainer 180 fixed to the piston rod 200, and the upper end thereof is pressed by the pressing member 160.

Specifically, the medium passage 210 includes a first passage 211 extending in an axial direction from an end of the piston rod 200 and a second passage 212 extending in a radial direction; the first passage 211 is communicated with the second passage 212, a top plug 310 which can adjust the position along the axial direction of the piston rod 200 is arranged at the crossing position of the first passage and the second passage, and at least one circle of sealing ring is sleeved on the outer wall of the top plug 310 in a hooping manner; the piston rod 200 is provided at an end thereof remote from the piston 100 with an adjusting screw 320, the adjusting screw 320 is rotatably mounted with respect to the piston rod 200 and has an eccentric portion 321 that directly or indirectly acts on the top plug 310. In this embodiment, the eccentric portion 321 indirectly acts on the top plug 310 through the top rod 340, and a cavity for the top rod 340 to move along the axial direction is formed in the piston rod 200. A knob 330 is fixed at one end of the adjusting rotary shaft 320, and when the knob 330 is rotated, the eccentric portion 321 can rotate to push the axial position of the push rod 340 relative to the piston rod 200, so as to adjust the axial position of the push plug 310, and change the effective conduction area of the medium channel 210.

The shock absorber comprises the piston assembly and further comprises a medium cylinder 400, and the piston 100 of the piston assembly is arranged in the medium cylinder 400 and is divided into an upper medium cavity and a lower medium cavity; the end of the piston rod 200 remote from the piston 100 protrudes outside the medium cylinder 400, and the medium cylinder 400 is further circumscribed by a medium chamber 500.

For the shock absorber, as shown in the figure, in the compression stroke, the piston 100 and the piston rod 200 move upwards integrally, the medium in the upper medium chamber is compressed, so that a part of the medium in the upper medium chamber enters the medium chamber 500 through the forward flow hole 111 and the medium channel 210, and another part of the medium enters the medium chamber 500, in the rebound stroke, the piston 100 and the piston rod 200 move downwards integrally, the medium in the lower medium chamber is compressed, the medium in the lower medium chamber enters the upper medium chamber through the medium channel 210 and the reverse flow hole 112, and simultaneously the medium in the medium chamber 500 is compensated into the upper medium chamber, the effective conducting area change of the medium channel 210 will cause the rebound damping force of the shock absorber to change, and the purpose of adjusting the rebound damping force can be achieved by adjusting the position of the top plug 310.

The utility model discloses a piston, piston assembly and bumper shock absorber have additionally added the spring to at least one check valve door amount, because the stable and rigidity of spring stiffness calculates easily for the performance of the check valve who has added the spring is controlled easily, from this in the design can accomplish comparatively accurately to whole piston, piston assembly and even the performance control of bumper shock absorber, can make things convenient for the timing to the softness and hardness degree of bumper shock absorber.

The above description is only a preferred embodiment of the present invention, and it should be noted that: for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be considered as the protection scope of the present invention.

Claims (10)

1. The piston is characterized in that it comprises a base part, and the base part is provided with a forward flow hole and a reverse flow hole; the outlet position of the forward flow hole and the outlet position of the reverse flow hole are respectively provided with compression holes. valve and rebound valve; the compression valve and the rebound valve are respectively abutted on both side end faces of the base part, at least the former of the two can move axially relative to the base part and is pressed by a spring. 2 . The piston according to claim 1 , wherein the compression valve is pressed by a spring; the rebound valve is pressed by a pressing member fixed relative to the base portion, and the rebound valve is pressed by a spring. 3 . The valve itself can be elastically deformed. 3. The piston of claim 2, further comprising a connecting piece fixed relative to the base portion, one end of the spring abuts the connecting piece, and the other end of the spring abuts the compression valve. 4 . The piston according to claim 1 , wherein the rebound valve is formed by stacking a plurality of first valve plates, and the outer dimension of the first valve plates gradually decreases in the direction away from the base portion. 5 . . 5 . The piston according to claim 1 , wherein the compression valve is formed by stacking a plurality of second valve plates, and in the direction away from the base portion, the outer dimensions of the second valve plates gradually decrease. 6 . 6. A piston assembly, characterized in that it comprises the piston of any one of claims 1-5, and further comprises a piston rod, one end of the piston rod passing through the piston, and the two are relatively fixed; the piston rod A medium channel connecting two ends of the piston is opened inside, and the effective conduction area of the medium channel is adjustable. 7 . The piston assembly of claim 6 , wherein the medium passage comprises a first passage extending axially from an end of the piston rod and a second passage extending radially; the first passage A channel communicates with the second channel, and a plug whose position can be adjusted along the axial direction of the piston rod is provided at the intersection of the two. 8 . The piston assembly according to claim 7 , wherein the end of the piston rod away from the piston is provided with an adjusting rotary shaft, the adjusting rotary shaft is rotatably installed relative to the piston rod, and has It can act directly or indirectly on the eccentric part of the top plug. 9 . The piston assembly according to claim 8 , wherein a knob is fixed on one end of the adjusting rotary shaft. 10 . 10. A shock absorber, comprising the piston assembly according to claim 6, further comprising a medium cylinder, wherein the piston of the piston assembly is placed in the medium cylinder and partitioned into an upper medium chamber and a lower medium cavity; the end of the piston rod away from the piston protrudes out of the medium cylinder.

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