CN211693342U - Shock absorber - Google Patents

Abstract

The utility model relates to a shock absorber, it has mainly solved the poor problem of sealed effect of shock absorber among the prior art, including the base, locate the hydraulic pressure section of thick bamboo on the base, the coaxial inner tube that is provided with in the hydraulic pressure section of thick bamboo, the lower extreme of inner tube set up on the base and the base between form the circulation way, the upper end of hydraulic pressure section of thick bamboo and inner tube closely is provided with the seal closure, hydraulic pressure section of thick bamboo, inner tube and seal closure form one and hold the chamber, be provided with a piston rod in the inner tube, its upper end passes the seal closure and extends to reach the hydraulic pressure section of thick bamboo outside and be provided with the mount pad, the fixed fixing base that is provided with on the surface of hydraulic pressure section of thick bamboo, it is equipped with first spring to lie in the cover between mount pad and the fixing base on the hydraulic pressure section of thick bamboo, A connecting sleeve and a second spring.

Description

Shock absorber

Technical Field

The utility model relates to a shock absorber.

Background

The shock absorber is a common part of a locomotive. The shock absorber is required to absorb shock caused by the fact that a wheel meets a concave-convex road surface and the riding is comfortable because the spring cannot be stabilized immediately, namely after the spring is compressed and released, the spring can be repeatedly compressed and relaxed for a period of time. The conventional shock absorber generally includes a pressure cylinder fixedly connected to the vehicle body, the pressure cylinder contains damping oil with high viscosity, and is provided with a piston, one end of the pressure cylinder penetrates a connecting rod, one end of the connecting rod is fixedly connected to the rim of the wheel, the other end of the connecting rod is fixedly connected to the piston in the pressure cylinder, and the outside of the connecting rod is sleeved with a spring. When braking, the vehicle body can drive the piston through the connecting rod to compress the damping oil in the cylinder, so as to obtain the buffer effect.

Chinese patent application No.: 201620469734.9 discloses a damper with adjustable damping, which is implemented such that when a vehicle is impacted, the piston rod moves inward to compress the spring and drive the piston to move downward, so that the damping oil in the inner cylinder flows into the secondary pressure cylinder through the second channel, then flows into the space between the inner cylinder and the main pressure cylinder through the third channel, the flow channels of the first and second damping adjusters and the first channel in sequence, and then flows back into the inner cylinder through the through hole at the upper end of the inner cylinder. The damping oil with viscosity is subjected to resistance in the flowing process, so that the damping effect in the compression process can be generated; on the other hand, when the spring of the shock absorber rebounds to drive the piston to move upwards under the drive of the piston rod, the damping oil in the inner cylinder flows into the auxiliary pressure cylinder through the space, the first channel, the flow channels of the first and second damping regulators and the third channel in sequence from the through hole at the upper end of the inner cylinder, and then flows back into the inner cylinder through the second channel. The damping oil is subjected to resistance in the flowing process, so that the damping effect can be generated; however, in the practical use process of the shock absorber, the motion frequency of the piston rod of the shock absorber realizes the sealing of the main pressure cylinder, the inner cylinder and the piston rod through the upper cover, and the main pressure cylinder and the inner cylinder form a chamber for storing damping oil, so that the damping oil is easy to leak out when the internal pressure of the upper cover and the main pressure cylinder is continuously changed, and the sealing effect is poor.

SUMMERY OF THE UTILITY MODEL

Therefore, to the above-mentioned problem, the utility model provides a shock absorber, it has mainly solved the poor problem of sealed effect of shock absorber among the prior art.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a shock absorber, includes the base, locates the hydraulic pressure section of thick bamboo on the base, coaxial inner tube that is provided with in the hydraulic pressure section of thick bamboo, the lower extreme of inner tube set up on the base and with form the circulation passageway between the base, the upper end of hydraulic pressure section of thick bamboo and inner tube closely is provided with the seal closure, hydraulic pressure section of thick bamboo, inner tube and seal closure form one and hold the chamber, be provided with a piston rod in the inner tube, its upper end passes the seal closure and extends to reach the hydraulic pressure section of thick bamboo outside and be provided with the mount pad, the fixed fixing base that is provided with on the surface of hydraulic pressure section of thick bamboo, lie in the hydraulic pressure section of thick bamboo and overlap between mount pad and the fixing base and be equipped with first spring, the lower extreme of piston rod.

Further, the closing cap has a through-hole that supplies the piston rod to pass, the closing cap from the top down includes sealed pad, top cap and sealed lid in proper order, the upper portion of top cap is provided with an embedded groove, sealed pad inlays and locates in this embedded groove, the week side that is located the through-hole on the top cap extends and is provided with the extension, and this extension supports and leans on the surface of piston rod, week side that is located the through-hole on the sealed lid is provided with the lug, the lug insert in the inner tube and with the internal surface zonulae occludens of inner tube.

Further, the piston comprises a piston body fixedly arranged on the piston rod, an annular groove is formed in the outer surface of the piston body in a surrounding mode, a sealing ring is embedded in the annular groove and is in close contact with the inner surface of the inner cylinder, a circulation hole for damping oil to flow is formed in the piston body in the axial direction of the piston rod, and a valve plate is arranged between the piston body and the connecting sleeve.

Furthermore, an anti-collision block is fixedly arranged on one side, close to the mounting seat, of the piston rod.

By adopting the technical scheme, the beneficial effects of the utility model are that: the shock absorber forms a cavity with better sealing property between the hydraulic cylinder and the inner cylinder through the design of the base, the hydraulic cylinder, the inner cylinder and the sealing cover, and a flow channel for damping oil to flow is formed between the inner cylinder and the base, and the sealing cover sequentially comprises a sealing gasket, a top cover and a sealing cover to form three layers of protective layers, so that the connecting area of the hydraulic cylinder and the sealing cover can avoid the outward leakage of the damping oil, meanwhile, an extension part arranged on the top cover and a lug arranged on the sealing cover can increase the contact area with a piston rod, and the sealing property of the upper end of the inner cylinder and the hydraulic cylinder is enhanced, thereby increasing the sealing property of the shock absorber, not only enhancing the sealing effect of the whole shock absorber, but also reducing the seepage flow between the inner cylinder at the upper end and the cavity, increasing the shock absorbing effect of the shock absorber, and in practical use, by arranging an elastic gasket, a connecting sleeve and, the shock absorber can better play a role in buffering in rebound, and hard contact with the sealing cover is reduced, so that the abrasion of the sealing cover is greatly reduced, and the service life is prolonged; furthermore, the through hole and the valve plate are arranged on the piston, so that the flow path of the damping oil is increased, and when the piston rod is stressed to extrude the damping oil, the fluidity of the damping oil can be increased, and the shock absorption effect of the shock absorber is improved; furthermore, the arranged anti-collision block prevents the sealing cover from being compressed too much and prevents the sealing cover from colliding with the mounting base, so that the sealing cover is effectively protected.

Drawings

Fig. 1 is a schematic perspective view of an embodiment of the present invention;

fig. 2 is an exploded view of an embodiment of the present invention;

FIG. 3 is a schematic sectional view of the piston rod, the sealing cap, the inner cylinder and the hydraulic cylinder in the embodiment of the present invention;

fig. 4 is a partially enlarged view of a portion a in fig. 3.

Detailed Description

The present invention will now be further described with reference to the accompanying drawings and detailed description.

The embodiment of the utility model provides a do:

referring to fig. 1 to 4, a shock absorber includes a base 1 and a hydraulic cylinder 2 disposed on the base 1, an inner cylinder 3 is coaxially disposed in the hydraulic cylinder 2, a lower end of the inner cylinder 3 is disposed on the base 1 and forms a flow passage with the base 1, a sealing cover 4 is tightly disposed at upper ends of the hydraulic cylinder 2 and the inner cylinder 3, the hydraulic cylinder 2, the inner cylinder 3 and the sealing cover 4 form a chamber 5, and communicate a space between the chamber 5 and the inner cylinder 3 through the flow passage, a piston rod 6 is disposed in the inner cylinder 3, an upper end of the piston rod passes through the sealing cover 4 and extends to reach an outer side of the hydraulic cylinder 2 and is provided with a mounting seat 7, a fixing seat 8 is fixedly disposed on an outer surface of the hydraulic cylinder 2, a first spring 9 is sleeved between the mounting seat 7 and the fixing seat 8 on the hydraulic cylinder 2, a lower end of the piston rod 6 is disposed in the inner cylinder 3, piston 10 encircles including the fixed piston body 101 of locating on piston rod 6 be provided with ring channel 103 on the surface of piston body 101, the embedded sealing washer 104 that is equipped with of ring channel 103, this sealing washer 104 and inner tube 3's internal surface in close contact with, be provided with the opening 105 that supplies damping oil to flow along the axial direction of piston rod 6 on the piston body 101, be provided with valve block 106 between piston body 101 and the adapter sleeve 12, the one end that is close to piston 10 on the piston rod 6 overlaps in proper order and is equipped with elastic gasket 11, adapter sleeve 12 and second spring 13, elastic gasket 11 is two semicircles and has the arc form and connects and form spatial structure, can have buffer function by extrusion deformation, the fixed crashproof piece 14 that is provided with in one side that is close to the mount pad on the piston rod 6.

In this embodiment, the sealing cover 4 has a through hole 41 through which the piston rod 6 passes, the sealing cover 4 sequentially includes a sealing gasket 42, a top cover 43 and a sealing cover 44 from top to bottom, the upper portion of the top cover 43 is provided with an embedded groove 45, the sealing gasket 42 is embedded in the embedded groove 45, the peripheral side of the through hole 41 on the top cover 43 extends to form an extension 46, the extension 46 abuts against the outer surface of the piston rod 6, the peripheral side of the through hole 41 on the sealing cover 44 is provided with a bump 47, and the bump 47 is inserted into the inner cylinder 3 and is tightly connected with the inner surface of the inner cylinder 3.

The utility model discloses a working method is: the shock absorber forms a cavity 5 with better sealing property between the hydraulic cylinder 2 and the inner cylinder 3 through the design of the base 1, the hydraulic cylinder 2, the inner cylinder 3 and the sealing cover 4, a flow channel for the flowing of damping oil is formed between the inner cylinder 3 and the base 1, and the sealing cover 4 sequentially comprises a sealing gasket 42, a top cover 43 and a sealing cover 44 to form a three-layer protective layer, so that the connecting area of the hydraulic cylinder 2 and the sealing cover 4 can avoid the outward leakage of the damping oil, meanwhile, an extension part 46 arranged on the top cover 43 and a lug 47 arranged on the sealing cover 44 increase the contact area with the piston rod 6, the sealing property of the upper ends of the inner cylinder 3 and the hydraulic cylinder 2 is enhanced, the sealing property of the shock absorber is increased, the sealing effect of the whole shock absorber is enhanced, the seepage flow between the inner cylinder 3 and the cavity 5 at the upper end is reduced, and the shock absorbing effect of the shock absorber is, in practical use, the elastic gasket 11, the connecting sleeve 12 and the second spring 13 are arranged, so that the shock absorber can better play a role in buffering in rebound, and hard contact with the sealing cover 4 is reduced, so that the abrasion of the sealing cover 4 is greatly reduced, and the service life is prolonged; the through hole 105 and the valve plate 106 are arranged on the piston 10, so that the flow path of the damping oil is increased, and when the piston rod is stressed to extrude the damping oil, the fluidity of the damping oil can be increased, and the shock absorption effect of the shock absorber is improved; the anti-collision block 14 is arranged to prevent the sealing cover 4 from being compressed too much and prevent the sealing cover 4 from colliding with the mounting base 7, thereby effectively protecting the sealing cover 4.

While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (4)

1. A shock absorber, comprising: the hydraulic cylinder comprises a base, a hydraulic cylinder arranged on the base, wherein an inner cylinder is coaxially arranged in the hydraulic cylinder, the lower end of the inner cylinder is arranged on the base and forms a flow passage with the base, a sealing cover is tightly arranged at the upper end of the hydraulic cylinder and the upper end of the inner cylinder, the hydraulic cylinder, the inner cylinder and the sealing cover form an accommodating cavity, a piston rod is arranged in the inner cylinder, the upper end of the piston rod penetrates through the sealing cover to extend to the outer side of the hydraulic cylinder and is provided with a mounting seat, a fixing seat is fixedly arranged on the outer surface of the hydraulic cylinder, a first spring is sleeved between the mounting seat and the fixing seat on the hydraulic cylinder, the lower end of the piston rod is arranged in the inner cylinder and is connected with the piston through contact with the inner.

2. A shock absorber according to claim 1, wherein: the sealing cover has a through-hole that supplies the piston rod to pass, the sealing cover from the top down includes sealed pad, top cap and sealed lid in proper order, the upper portion of top cap is provided with an embedded groove, sealed pad inlays and locates in this embedded groove, the week that is located the through-hole on the top cap extends and is provided with the extension, and this extension supports and leans on the surface of piston rod, the week that is located the through-hole on the sealing cover is provided with the lug, the lug insert in the inner tube and with the internal surface zonulae occludens of inner tube.

3. A shock absorber according to claim 1 or 2, wherein: the piston comprises a piston body fixedly arranged on the piston rod, an annular groove is formed in the outer surface of the piston body in a surrounding mode, a sealing ring is embedded in the annular groove and is in close contact with the inner surface of the inner cylinder, a circulation hole for damping oil to flow is formed in the piston body in the axial direction of the piston rod, and a valve block is arranged between the piston body and the connecting sleeve.

4. A shock absorber according to claim 3, wherein: and an anti-collision block is fixedly arranged on one side of the piston rod, which is close to the mounting seat.

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