CN216143107U

CN216143107U - Bidirectional buffering shock absorber and vehicle

Info

Publication number: CN216143107U
Application number: CN202121667929.1U
Authority: CN
Inventors: 陈成刚
Original assignee: Beijing CHJ Automobile Technology Co Ltd
Current assignee: Beijing CHJ Automobile Technology Co Ltd
Priority date: 2021-07-21
Filing date: 2021-07-21
Publication date: 2022-03-29
Anticipated expiration: 2031-07-21

Abstract

The utility model relates to a shock attenuation technical field especially relates to a two-way buffering bumper shock absorber and vehicle. The bidirectional buffer shock absorber comprises a shell, a piston rod, a piston valve, a guide seat, a bottom valve assembly, a first buffer device and a second buffer device, wherein the guide seat and the bottom valve assembly are respectively arranged at two ends of the shell; the first buffer device is arranged on the piston rod and positioned between the piston valve and the guide seat, and the second buffer device is positioned between the piston valve and the bottom valve assembly and connected with the bottom valve assembly. This two-way buffering bumper shock absorber, at the vehicle through the highway section of jolting, no matter the tire takes place to jump down or jump up and can both play the effect of fine buffering, has two-way buffering damping's effect, has greatly reduced the abnormal sound and the impact of vehicle, has improved the travelling comfort and the stability of riding.

Description

Bidirectional buffering shock absorber and vehicle

Technical Field

The utility model relates to a shock attenuation technical field especially relates to a two-way buffering bumper shock absorber and vehicle.

Background

The conventional vibration absorber mainly comprises an outer cylinder, an inner cylinder, a piston rod guide seat, a piston valve assembly and a bottom valve assembly, wherein vibration-absorbing oil is added into the inner cylinder and the outer cylinder, and the inner cylinder and the outer cylinder are sealed and riveted into a whole after being inflated. When the wheel jumps down, the shock absorber is stretched, namely the piston valve and the piston rod move upwards (rebound) relative to the bottom valve together, and oil flows through a valve plate gap of the piston valve to generate rebound damping force. When the wheel jumps up, the shock absorber is compressed, namely the piston valve and the piston rod move downwards (compress) relative to the bottom valve together, and the oil flows through the valve plate gap of the bottom valve to generate compression damping force. The shock absorber dampens vibrational energy by rebound and compression damping generated by the piston and base valves.

When a vehicle passes through a bumpy road section, if the rebound damping force is insufficient, the tire descending acceleration is large, the shock absorber easily reaches the stretching limit, the vehicle body is poor in stability and easily inclines, and the piston valve assembly and the guide sleeve collide to generate abnormal sound and impact; if the compression damping force is insufficient, the wheel jump acceleration is large, the shock absorber easily reaches the compression limit, the polyurethane buffer block is broken down at the moment, bottoming is easy to occur, and riding comfort and stability are poor.

SUMMERY OF THE UTILITY MODEL

To solve the technical problem or at least partially solve the technical problem, the present disclosure provides a bidirectional buffer damper and a vehicle.

The invention provides a bidirectional buffer shock absorber which comprises a shell, a piston rod, a piston valve, a guide seat, a bottom valve assembly, a first buffer device and a second buffer device, wherein the guide seat and the bottom valve assembly are respectively arranged at two ends of the shell; the first buffer device is arranged on the piston rod and located between the piston valve and the guide seat, and the second buffer device is located between the piston valve and the bottom valve assembly and connected with the bottom valve assembly.

Optionally, the first buffering device comprises a limiting seat and a first elastic assembly, the piston rod is sleeved with the limiting seat, and the first elastic assembly is arranged between the limiting seat and the guide seat.

Optionally, the first elastic assembly includes a first spring and first guide sleeves disposed at two ends of the first spring, the first guide sleeves include a first guide portion and a first fixing portion that are coaxially disposed, a diameter of the first fixing portion is smaller than a diameter of the first guide portion, the first guide sleeves are further provided with first fitting holes, the first fitting holes axially penetrate through the first guide portion and the first fixing portion, and the first fitting holes are used for sleeving the first guide sleeves on the piston rod; a first gap is formed between the first guide portion and the inner wall of the shell, and the first fixing portion is sleeved in the first spring and in interference fit with the first spring.

Optionally, the first elastic component further includes a first valve body assembly and a first elastic gasket, the first valve body assembly and the first elastic gasket are disposed between the first guide sleeve and the limiting seat, the first valve body assembly and the first elastic gasket are both sleeved on the piston rod, and the first valve body assembly is in clearance fit with the piston rod and is in sealing fit with the inner wall of the housing; the first elastic gasket is in interference fit with the piston rod, and a second gap is formed between the first elastic gasket and the inner wall of the shell.

Optionally, the first valve body assembly includes a first valve body and a first seal ring, the first valve body is provided with a first central hole, the first central hole is sleeved on the piston rod, and a third gap is formed between the first central hole and the piston rod; the first sealing ring is sleeved on the outer circumferential surface of the first valve body and is in interference fit with the inner wall of the shell.

Optionally, two axial sides of the first valve body are respectively attached to the first guide sleeve and the first elastic gasket, a first radial fluid channel is arranged between the first valve body and the first guide sleeve, a second radial fluid channel is arranged between the first valve body and the first elastic gasket, two ends of the first fluid channel are respectively communicated with the first gap and the third gap, and two ends of the second fluid channel are respectively communicated with the second gap and the third gap.

Optionally, the bottom valve assembly includes bottom valve body and mounting, the mounting with bottom valve body fixed connection, just the mounting is located the working chamber, the mounting includes second guide part and second fixed part, the diameter of second fixed part is less than the diameter of second guide part, a pot head of second buffer is established on the second fixed part, the mobilizable locating of the other end in the working chamber.

Optionally, the second buffer device comprises a second elastic assembly, the second elastic assembly comprises a second spring, a second guide sleeve and a third guide sleeve, the second guide sleeve and the third guide sleeve are arranged at two ends of the second spring, the second guide sleeve is fixedly sleeved on the second fixing portion, a fourth gap is formed between the second guide sleeve and the inner wall of the shell, and the third guide sleeve is movably arranged in the working cavity.

Optionally, the second elastic component includes a second valve body assembly and a second elastic gasket, the second valve body assembly is disposed on a side of the second guide sleeve facing away from the second spring, and the second valve body assembly is disposed between the second guide sleeve and the second elastic gasket; the second valve body assembly and the second elastic gasket are sleeved on the second fixing part, and the second valve body assembly is in clearance fit with the second fixing part and is in sealing fit with the inner wall of the shell; the second elastic gasket is in interference fit with the second fixing part, and a fifth gap is formed between the second elastic gasket and the inner wall of the shell.

Optionally, the second valve body assembly includes a second valve body and a second sealing ring, the second valve body is provided with a second center hole, the second valve body is sleeved on the second fixing portion, the second center hole and a sixth gap is formed between the second fixing portions, the second sealing ring is sleeved on the outer circumferential surface of the second valve body and the inner wall of the casing to realize the sealing fit of the second valve body and the inner wall of the casing.

Optionally, two axial sides of the second valve body are respectively attached to the second guide sleeve and the second elastic gasket, a radial third fluid channel is arranged between the second valve body and the second guide sleeve, a radial fourth fluid channel is arranged between the second valve body and the second elastic gasket, two ends of the third fluid channel are respectively communicated with the fourth gap and the sixth gap, and two ends of the fourth fluid channel are respectively communicated with the fifth gap and the sixth gap.

The present disclosure also provides a vehicle comprising a bi-directional cushion damper as in any one of the above.

Compared with the prior art, the technical scheme provided by the embodiment of the disclosure has the following advantages: according to the bidirectional buffering shock absorber provided by the embodiment of the disclosure, the first buffering device is arranged on the piston assembly, and when the shock absorber is stretched, the first buffering device is contacted with the guide seat to play a buffering role, so that the piston assembly is prevented from being directly and firmly contacted with the guide seat, and abnormal sound and impact are further reduced; when the shock absorber is compressed, the piston assembly is firstly contacted with the second buffering device, so that the hard contact with the bottom valve assembly is avoided, and the riding comfort and the riding stability are improved. This two-way buffering bumper shock absorber, at the vehicle through the highway section of jolting, no matter the tire takes place to jump down or jump up and can both play the effect of fine buffering, has two-way buffering damping's effect, has greatly reduced the abnormal sound and the impact of vehicle, has improved the travelling comfort and the stability of riding.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.

In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present disclosure, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.

FIG. 1 is a schematic structural view of a bi-directional cushion shock absorber according to an embodiment of the present disclosure;

FIG. 2 is an enlarged view of a portion of point A in FIG. 1;

FIG. 3 is a partial enlarged view of point B in FIG. 1;

fig. 4 is a schematic mechanism diagram of a first valve body assembly according to an embodiment of the disclosure.

Wherein, 1, a shell; 101. an outer cylinder; 102. an inner barrel; 201. a piston rod; 202. a piston valve; 3. a first buffer device; 301. a limiting seat; 302. a first guide sleeve; 303; a first spring; 304. a first valve body assembly; 304a, a first valve body; 304b, a first sealing ring; 305. a first resilient pad; 4. a base valve assembly; 401. a base valve body; 402. a fixing member; 5. a second buffer device; 501. a third guide sleeve; 502. a second spring; 503. a second guide sleeve; 504. a second valve body assembly; 504a, a second valve body; 504b, a second seal ring; 505. a second resilient pad; 6. a first gap; 7. a third gap; 8. a second gap; 9. a first fluid channel; 10. a second fluid passage; 11. a fourth gap; 12. a sixth gap; 13. a fifth gap; 14. a third fluid passage; 15. a fourth fluid channel; 16. a guide seat.

Detailed Description

In order that the above objects, features and advantages of the present disclosure may be more clearly understood, aspects of the present disclosure will be further described below. It should be noted that the embodiments and features of the embodiments of the present disclosure may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present disclosure, but the present disclosure may be practiced in other ways than those described herein; it is to be understood that the embodiments disclosed in the specification are only a few embodiments of the present disclosure, and not all embodiments.

As shown in fig. 1 to 4, the embodiment of the present disclosure provides a bidirectional buffer shock absorber, which includes a housing 1, a piston rod 201, a piston valve 202, a guide seat 16, a bottom valve assembly 4, a first buffer device 3, and a second buffer device 5, where the guide seat 16 and the bottom valve assembly 4 are respectively disposed at two ends of the housing 1, a working chamber is formed inside the housing 1, the piston rod 201 movably extends into the working chamber from the guide seat 16, and the piston valve 202 is disposed in the working chamber and connected to an end of the piston rod 201 located in the working chamber; the first damping device 3 and the second damping device 5 are both located in the working chamber, wherein the first damping device 3 is disposed on the piston rod 201 and located between the piston valve 202 and the guide seat 16, and the second damping device 5 is located between the piston valve 202 and the base valve assembly 4 and connected with the base valve assembly 4.

Specifically, the housing 1 comprises an outer cylinder 101 and an inner cylinder 102, the inner cylinder 102 and the outer cylinder 101 are coaxially arranged, the inner cylinder 102 is sleeved inside the outer cylinder 101, a gap exists between the inner cylinder 102 and the outer cylinder 101, and damping oil is added into the gap between the outer cylinder 101 and the inner cylinder 102 and a working cavity of the inner cylinder 102, inflated, sealed and riveted into a whole. The two ends of the inner cylinder 102 are opened, the guide seat 16 and the bottom valve assembly 4 are respectively arranged at the two ends of the inner cylinder 102 and fixedly connected with the outer cylinder 101, a through hole axially arranged along the inner cylinder 102 is arranged on the guide seat 16, the piston rod 201 extends into the working cavity from the through hole, the piston rod 201 and the through hole can be connected in a linear bearing mode and the like, so that the piston rod 201 can always keep axial movement when moving, the piston valve 202 is arranged at the end part of one end, extending into the working cavity, of the piston rod 201, the piston valve 202 is matched with the inner cylinder 102, the working cavity is divided into a first cavity and a second cavity which are positioned at the two sides of the piston valve 202, the first cavity is a cavity from the guide seat 16 to the first side of the piston valve 202, and the second cavity is a cavity from the second side of the piston valve 202 to the bottom valve assembly 4. The piston valve 202 is axially movable with the piston rod 201 to vary the relative sizes of the first and second chambers, thereby regulating the pressures of the first and second chambers. The first buffer device 3 is arranged on the piston rod 201 and located between the piston valve 202 and the guide seat 16, when the bidirectional buffer shock absorber is stretched, that is, the piston rod 201 is pulled outwards, in the process that the piston rod 201 is continuously pulled out, the first buffer device 3 firstly contacts with the guide seat 16, the first buffer device 3 plays a certain buffer role between the guide seat 16 and the piston valve 202, direct rigid contact between the piston valve 202 and the guide seat 16 is avoided, and abnormal sound and impact generated by collision between the guide sleeve and the piston valve 202 are reduced. The second buffer device 5 is arranged between the piston valve 202 and the base valve assembly 4 and connected with the base valve assembly 4, when the two-way buffer shock absorber is compressed, the piston rod 201 carries the piston valve 202 to move in a direction approaching to the base valve assembly 4, and when the two-way buffer shock absorber moves to the position of the base valve assembly 4, the second buffer device 5 is firstly contacted with the piston valve 202, so that the direct rigid contact between the piston valve 202 and the base valve assembly 4 is avoided, the damage to the piston valve 202 and the base valve assembly 4 is reduced, and the riding comfort and the stability are improved.

Further, as shown in fig. 2, in some embodiments of the present disclosure, the first buffering device 3 includes a limiting seat 301 and a first elastic component, wherein the limiting seat 301 is fixedly sleeved on the piston rod 201, the first elastic component is disposed between the limiting seat 301 and the guide seat 16, one end of the first elastic component is fixedly connected to the limiting seat 301, the limiting seat is fixed on the piston rod, and the first elastic component can move along with the piston rod 201 during the movement of the piston rod 201. Specifically, the limiting seat 301 may be a shaft shoulder formed by extending the piston rod 201 in the radial direction, or may be an annular block, an inner ring of the annular block is matched with the piston rod 201 to fix the annular block on the piston rod 201, and an outer diameter of the annular block is greater than a diameter of the piston rod 201 and smaller than an inner diameter of the inner cylinder 102, so as to ensure that the limiting seat 301 can move axially in the working cavity. The first elastic component is sleeved on the piston rod 201, one end of the first elastic component is fixedly connected with the limiting seat 301, and the other end of the first elastic component can move along the axial direction of the piston rod 201. When the piston rod 201 is pulled out in a direction away from the base valve assembly 4, the first elastic member is in elastic contact with the guide seat 16 at a position moved to the guide seat 16, and as the piston rod 201 continues to be pulled out, the first elastic member is gradually compressed to reduce the adverse effect of the external force on the shock absorber.

Specifically, in some embodiments of the present disclosure, the first elastic component includes a first spring 303 and first guide sleeves 302 disposed at two ends of the first spring 303, the first guide sleeves 302 include a first guide portion and a first fixing portion coaxially disposed, a diameter of the first fixing portion is smaller than a diameter of the first guide portion, a first fitting hole is further disposed on the first guide sleeves 302, the first fitting hole axially penetrates through the first guide portion and the first fixing portion, and the first guide sleeves 302 are fitted with the piston component through the first fitting hole. Further, the outer diameter of the first guide portion is smaller than the inner diameter of the inner cylinder 102, and therefore, a first gap 6 is formed between the first guide portion and the inner cylinder 102. The two first guide sleeves 302 at the two ends of the first spring 303 are arranged oppositely, in some embodiments of the present disclosure, the two ends of the first spring 303 are respectively sleeved on the first fixing portions of the two first guide sleeves 302, and the inner diameter of the first spring 303 is in interference fit with the outer diameter of the first fixing portion, so as to fix and restrain the first spring 303, and prevent the spring from scratching the piston rod 201 or the inner cylinder 102 due to deviation in the moving process. The first spring 303 may be replaced with a rubber sleeve or other elastic member, and elasticity is preferred in the embodiment of the present disclosure because the spring can generate linear spring mechanical force within a designed stroke.

Further, in some embodiments of the present disclosure, the first elastic component further includes a first valve body assembly 304 and a first elastic gasket 305, the first valve body assembly 304 and the first elastic gasket 305 are disposed between the first guide sleeve 302 and the limiting seat 301, the first valve body assembly 304 and the first elastic gasket 305 are both sleeved on the piston rod 201, an inner diameter of the first valve body assembly 304 is greater than a diameter of the piston rod 201, the first valve body assembly 304 is connected with the piston rod 201 in a clearance fit manner, an outer diameter of the first valve body assembly 304 is greater than an inner diameter of the inner cylinder 102, and the first valve body assembly 304 is connected with the inner cylinder 102 in a sealing fit manner. The first valve body assembly 304 is disposed between the first elastic washer 305 and the first guide sleeve 302, and is clamped and fixed by the first guide sleeve 302 and the first elastic washer 305. The first elastic gasket 305 is made of rubber, has a certain elasticity and a certain deformation amount, and the first elastic gasket 305 is connected with the piston rod 201 in an interference fit manner, so that the first elastic gasket 305 is fixed on the piston rod 201, and the outer diameter of the first elastic gasket 305 is smaller than the inner diameter of the inner cylinder 102, so that a second gap 8 is formed between the first elastic gasket 305 and the inner cylinder 102.

Furthermore, the first valve body assembly 304 includes a first valve body 304a and a first sealing ring 304b, the first valve body 304a is provided with a first central hole, the first central hole is sleeved on the piston rod 201, and the diameter of the first central hole is larger than that of the piston rod 201, and when the first valve body 304a is sleeved on the piston rod 201, a third gap 7 is formed between the first valve body 304a and the piston rod 201. The first sealing ring 304b is sleeved on the outer circumferential surface of the first valve body 304a and is in interference fit with the inner cylinder 102. Specifically, the outer diameter of the first valve body 304a is slightly smaller than the inner diameter of the inner cylinder 102, a groove is formed in the outer circumferential surface of the first valve body 304a along the circumferential direction, the inner ring of the first sealing ring 304b is embedded into the groove to be fixedly connected with the first valve body 304a, and the outer ring of the first sealing ring 304b is attached and sealed with the inner wall of the inner cylinder 102.

Further, in some embodiments of the present disclosure, two axial sides of the first valve body 304a are respectively attached to the first guide sleeve 302 and the first spring 303, a first radial fluid channel 9 is formed between the first valve body 304a and the first guide sleeve 302, a second radial fluid channel 9 is formed between the first valve body 304a and the first resilient gasket 305, two ends of the first fluid channel 9 are respectively communicated with the first gap 6 and the third gap 7, and two ends of the second fluid channel 10 are respectively communicated with the second gap 8 and the third gap 7, so that a fluid channel is formed between the first guide sleeve 302, the first valve body 304a and the first resilient gasket 305 for flowing oil. Specifically, the first fluid passage 9 may be a groove formed on the first valve body 304a or the first guide sleeve 302, or grooves formed on the first valve body 304a and the first guide sleeve 302, respectively, may jointly constitute the first fluid passage 9. In some embodiments of the present disclosure, as shown in fig. 4, an end surface of one side of the first valve body 304a facing the first guide sleeve 302 is recessed toward the other side to form the first fluid passages 9, the number of the first fluid passages 9 may be provided in a plurality, and the plurality of first fluid passages 9 are uniformly distributed along the circumferential direction of the first valve body 304 a. The end surface of the first valve body 304a facing one side of the first elastic washer 305 is recessed toward the other side to form second fluid passages 10, and the second fluid passages 10 are equal in number and are arranged opposite to the first fluid passages 9. Normally, the oil flows from the first fluid passage 9 into the second fluid passage 10 through the third gap 7.

When the shock absorber is stretched, the oil in the working chamber can smoothly flow from the first fluid passage 9 of the first valve body 304a to the second fluid passage 10 through the third gap 7, and at this time, only the piston valve 202 generates the rebound damping force; as the shock absorber continues to be extended until the first guide sleeve 302, which is adjacent to the guide block 16, comes into contact with the guide block 16, the first spring 303 starts to be compressed to generate a linear spring force; with the increasing extrusion of the first spring 303, the spring force is continuously applied to the first valve body assembly 304 and the first elastic gasket 305, the pressure on the first valve body assembly 304 and the first elastic gasket 305 is continuously increased, when the first elastic gasket 305 is extruded to a certain extent, the first elastic gasket 305 is continuously deformed, so that the second fluid passage 10 is filled by the first elastic gasket 305, the gap between the first valve body 304a and the first elastic gasket 305 disappears, the hydraulic pressure is sharply increased, the energy is attenuated, the rebound movement of the shock absorber is prevented, and the hydraulic buffering and limiting effects are achieved. When the shock absorber is compressed, the first fluid passage 9 and the second fluid passage 10 of the first valve body 304a are always open without any influence of the hydraulic force since no force is applied to the first elastic washer 305.

Referring to fig. 3, the base valve assembly 4 in the shock absorber includes a base valve body 401 and a fixing member 402, the fixing member 402 is fixedly connected to the base valve body 401, the base valve body 401 is fixedly mounted on the outer cylinder 101, the fixing member 402 is located in the inner cylinder 102 and is used for mounting the second buffering device 5, the fixing member 402 includes a second guiding portion and a second fixing portion, the diameter of the second fixing portion is smaller than that of the second guiding portion, one end of the second buffering device 5 is sleeved on the second fixing portion, and the other end is movably disposed in the working chamber. Specifically, the end, provided with the second fixing portion, of the second buffer device 5 is arranged towards the piston rod 201, the second guide portion is arranged away from the piston rod 201, the second buffer device 5 is axially provided with a threaded hole, and a fastening screw penetrates through the bottom valve body 401 and then is matched with the threaded hole in the second buffer device 5 to fixedly install the second buffer device 5 in the working cavity.

Further, the second buffer device 5 is disposed in the second chamber, in some embodiments of the present disclosure, the second buffer device 5 includes a second elastic component, the second elastic component includes a second spring 502, a second guiding sleeve 503 and a third guiding sleeve 501, the second guiding sleeve 503 is disposed at two ends of the second spring 502, the second guiding sleeve 503 is fixedly sleeved on the second fixing portion, the second guiding sleeve 503 has a structure similar to the first guiding sleeve 302, a diameter of a guiding portion of the second guiding sleeve 503 is smaller than an inner diameter of the inner cylinder 102, and a fourth gap 11 is formed between the guiding portion of the second guiding sleeve 503 and the inner cylinder 102. The structure of the third guide sleeve 501 is similar to that of the second guide sleeve 503, two ends of the second spring 502 are respectively in interference fit with the fixing portion of the second guide sleeve 503 and the fixing portion of the third guide sleeve 501, and the third guide sleeve 501 is movably arranged in the second chamber.

Further, in some embodiments of the present disclosure, the second elastic component includes a second valve body assembly 504 and a second elastic gasket 505, the second valve body assembly 504 is disposed on a side of the second guide sleeve 503 facing away from the second spring 502, that is, between the second guide sleeve 503 and the second guide portion, and the second elastic gasket 505 is disposed between the second valve body assembly 504 and the second guide portion; the second valve body assembly 504 and the second elastic gasket 505 are sleeved on the second fixing portion, the second valve body assembly 504 is in clearance fit with the second fixing portion and is in sealing fit with the inner cylinder 102, and the second elastic gasket 505 is in interference fit with the second fixing portion and forms a fifth clearance 13 with the inner cylinder 102. The second valve body assembly 504 includes a second valve body 504a and a second sealing ring 504b, the second valve body 504a is provided with a second central hole, the diameter of the second central hole is larger than the diameter of the second fixing portion, the second valve body 504a is sleeved on the second fixing portion, a sixth gap 12 is formed between the second central hole and the second fixing portion, the second sealing ring 504b is sleeved on the outer circumferential surface of the second valve body 504a, and the second sealing ring 504b is in sealing fit with the inner cylinder 102. Specifically, a groove is axially formed in the outer circumferential surface of the second valve body 504a, the inner ring of the second seal ring 504b is embedded in the groove, and the outer ring of the second seal ring 504b is attached and sealed to the inner wall of the inner cylinder 102.

The two sides of the second valve body 504a along the axial direction are respectively attached to the second guide sleeve 503 and the second elastic gasket 505, a radial third fluid channel 14 is arranged between the second valve body 504a and the second guide sleeve 503, a radial fourth fluid channel 15 is arranged between the second valve body 504a and the second elastic gasket 505, two ends of the third fluid channel 14 are respectively communicated with the fourth gap 11 and the sixth gap 12, and the edge of the fourth fluid channel 15 is respectively communicated with the fifth gap 13 and the sixth gap 12. Thus, a fluid passage is formed between the second guide sleeve 503, the second valve body 504a and the second elastic washer 505 for the oil to flow through. Specifically, the third fluid passage may be a groove formed in the second valve body 504a or the second guide sleeve 503, or grooves formed in the second valve body 504a and the second guide sleeve 503, respectively, may jointly constitute the third fluid passage 14. Specifically, in some embodiments of the present disclosure, the end surface of the second valve body 504a facing one side of the second guide sleeve 503 is recessed toward the other side to form the third fluid passages 14, the number of the third fluid passages 14 may be provided in a plurality, and the plurality of the third fluid passages 14 are uniformly distributed along the circumferential direction of the second valve body 504 a. The end surface of the second valve body 504a facing one side of the second elastic washer 505 is recessed toward the other side to form fourth fluid passages 15, and the number of the fourth fluid passages 15 is equal to that of the third fluid passages 14, and the fourth fluid passages 15 are arranged opposite to the third fluid passages 14. Normally, the oil flows from the third fluid passage 14 into the fourth fluid passage 15 through the sixth gap 12.

Similar to the operation principle of the first shock absorber 3, when the shock absorber is compressed, the oil can smoothly flow from the third fluid passage 14 on the second valve body 504a of the second shock absorber 5 to the fourth fluid passage 15 through the sixth gap 12, and only the bottom valve assembly 4 generates compression damping; as the shock absorber continues to be compressed until the piston valve 202 comes into contact with the third guide sleeve 501, the second spring is gradually compressed and generates a linear spring force; along with the extrusion of the second spring 502 is increased, the spring force is continuously applied to the second valve body assembly 504 and the second elastic gasket 505, the pressure on the second valve body assembly 504 and the second elastic gasket 505 is continuously increased, the second elastic gasket 505 is continuously deformed, the fourth fluid channel 15 is filled by the second elastic gasket 505, the gap between the second valve body 504a and the second elastic gasket 505 disappears, the hydraulic pressure is rapidly increased, the energy is attenuated, the compression movement is prevented, and the hydraulic buffering and limiting effects are achieved. Likewise, the second damping device 5 does not function and does not generate additional hydraulic pressure when the shock absorber is extended.

Further, in some embodiments of the present disclosure, a vehicle is further provided, in which the above-mentioned bidirectional damping absorber is applied, and the bidirectional damping absorber can play a good damping effect when a tire jumps up or down on a bumpy road section driven by the vehicle.

To sum up, the two-way buffering bumper shock absorber and vehicle that this disclosed embodiment provided through setting up first buffer 3 and second buffer 5, at the vehicle through the highway section of jolting, no matter take place to jump down or jump up the effect that can both play fine buffering for the tire, have the effect of two-way buffering damping, have greatly reduced the abnormal sound and the impact of vehicle, have improved the travelling comfort and the stability of taking a bus.

It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The foregoing are merely exemplary embodiments of the present disclosure, which enable those skilled in the art to understand or practice the present disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the disclosure. Thus, the present disclosure is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A bidirectional buffering shock absorber is characterized by comprising a shell (1), a piston rod (201), a piston valve (202), a guide seat (16), a bottom valve assembly (4), a first buffering device (3) and a second buffering device (5), wherein the guide seat (16) and the bottom valve assembly (4) are respectively arranged at two ends of the shell (1), a working cavity is formed in the shell (1), the piston rod (201) movably extends into the working cavity from the guide seat (16), and the piston valve (202) is arranged in the shell (1) and is connected with one end, located in the working cavity, of the piston rod (201); the first buffer device (3) is arranged on the piston rod (201) and located between the piston valve (202) and the guide seat (16), and the second buffer device (5) is located between the piston valve (202) and the bottom valve assembly (4) and connected with the bottom valve assembly (4).

2. The double-acting buffer shock absorber according to claim 1, wherein the first buffer device (3) comprises a limiting seat (301) and a first elastic component, the limiting seat (301) is fixedly sleeved on the piston rod (201), and the first elastic component is arranged between the limiting seat (301) and the guide seat (16).

3. The double-direction buffer shock absorber of claim 2, wherein the first elastic component comprises a first spring (303) and first guide sleeves (302) arranged at two ends of the first spring (303), the first guide sleeves (302) comprise a first guide part and a first fixing part which are coaxially arranged, the diameter of the first fixing part is smaller than that of the first guide part, the first guide sleeves (302) are further provided with first matching holes, the first matching holes axially penetrate through the first guide part and the first fixing part, and the first matching holes are used for sleeving the first guide sleeves (302) on the piston rods (201); first guide part with form first clearance (6) between the inner wall of casing (1), first fixed part cover establish with in first spring (303), and with first spring (303) interference fit.

4. The double-acting buffer shock absorber according to claim 3, wherein the first elastic component further comprises a first valve body assembly (304) and a first elastic gasket (305), the first valve body assembly (304) and the first elastic gasket (305) are arranged between the first guide sleeve (302) and the limiting seat (301), the first valve body assembly (304) and the first elastic gasket (305) are sleeved on the piston rod (201), and the first valve body assembly (304) is in clearance fit with the piston rod (201) and is in sealing fit with the inner wall of the housing (1); the first elastic gasket (305) is in interference fit with the piston rod (201), and forms a second gap (8) with the inner wall of the shell (1).

5. The double-acting cushion shock absorber according to claim 4, wherein the first valve body assembly (304) comprises a first valve body (304a) and a first sealing ring (304b), the first valve body (304a) is provided with a first central hole, the first central hole is sleeved on the piston rod (201) and a third gap (7) is formed between the first central hole and the piston rod (201); the first sealing ring (304b) is sleeved on the outer circumferential surface of the first valve body (304a) and is in interference fit with the inner wall of the shell (1).

6. The double-acting shock absorber according to claim 5, wherein two sides of the first valve body (304a) along the axial direction are respectively attached to the first guide sleeve (302) and the first elastic gasket (305), a first fluid channel (9) along the radial direction is arranged between the first valve body (304a) and the first guide sleeve (302), a second fluid channel (10) along the radial direction is arranged between the first valve body (304a) and the first elastic gasket (305), two ends of the first fluid channel (9) are respectively communicated with the first gap (6) and the third gap (7), and two ends of the second fluid channel (10) are respectively communicated with the second gap (8) and the third gap (7).

7. The double-acting shock absorber according to any one of claims 1 to 6, wherein the base valve assembly (4) comprises a base valve body (401) and a fixing member (402), the fixing member (402) is fixedly connected to the base valve body (401), the fixing member (402) is located in the working chamber, the fixing member (402) comprises a second guide portion and a second fixing portion, the diameter of the second fixing portion is smaller than that of the second guide portion, one end of the second damping device (5) is sleeved on the second fixing portion, and the other end of the second damping device is movably located in the working chamber.

8. The double-acting buffer shock absorber according to claim 7, wherein the second buffer device (5) comprises a second elastic component, the second elastic component comprises a second spring (502), a second guide sleeve (503) and a third guide sleeve (501), the second guide sleeve (503) is arranged at two ends of the second spring (502), the second fixed portion is sleeved with the second guide sleeve (503), a fourth gap (11) is arranged between the second guide sleeve (503) and the inner wall of the housing (1), and the third guide sleeve (501) is movably arranged in the working cavity.

9. The double-acting cushion shock absorber according to claim 8, wherein the second elastic component comprises a second valve body assembly (504) and a second elastic washer (505), the second valve body assembly (504) is arranged on a side of the second guide sleeve (503) facing away from the second spring (502), and the second valve body assembly (504) is arranged between the second guide sleeve (503) and the second elastic washer (505); the second valve body assembly (504) and the second elastic gasket (505) are sleeved on the second fixing part, and the second valve body assembly (504) is in clearance fit with the second fixing part and is in sealing fit with the inner wall of the shell (1); the second elastic gasket (505) is in interference fit with the second fixing part, and a fifth gap (13) is formed between the second elastic gasket and the inner wall of the shell (1).

10. The double-acting shock absorber according to claim 9, wherein the second valve body assembly (504) comprises a second valve body (504a) and a second sealing ring (504b), the second valve body (504a) is provided with a second central hole, the second valve body (504a) is sleeved on the second fixing portion, a sixth gap (12) is formed between the second central hole and the second fixing portion, and the second sealing ring (504b) is sleeved between the outer circumferential surface of the second valve body (504a) and the inner wall of the housing (1) to realize the sealing fit between the second valve body (504a) and the inner wall of the housing (1).

11. The double-acting shock absorber according to claim 10, wherein both sides of the second valve body (504a) in the axial direction are respectively abutted against the second guide sleeve (503) and the second elastic washer (505), a radial third fluid passage (14) is provided between the second valve body (504a) and the second guide sleeve (503), a radial fourth fluid passage (15) is provided between the second valve body (504a) and the second elastic washer (505), both ends of the third fluid passage (14) are respectively communicated with the fourth gap (11) and the sixth gap (12), and both ends of the fourth fluid passage (15) are respectively communicated with the fifth gap (13) and the sixth gap (12).

12. A vehicle comprising a bi-directional cushion shock absorber as claimed in any one of claims 1 to 11.