CN210978333U

CN210978333U - Rebound buffering structure of shock absorber and shock absorber

Info

Publication number: CN210978333U
Application number: CN201921672712.2U
Authority: CN
Inventors: 王刚; 赵魏魏; 陈佰活
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2019-09-30
Filing date: 2019-09-30
Publication date: 2020-07-10
Anticipated expiration: 2029-09-30

Abstract

The utility model relates to a buffer structure and shock absorber recover of shock absorber, this buffer structure that recovers sets up in the cylinder of shock absorber, and be located between the upper end and the piston rod of cylinder, buffer structure includes buffer block and barrel casing recover, the buffer block is fixed in the cylinder, the piston rod passes the buffer block, the piston rod is located to the barrel casing below cover of buffer block, and the lower tip of barrel casing is fixed in the piston rod, the internal diameter of the upper end part of barrel casing is greater than the diameter of piston rod, so that be formed with the oil pocket that holds hydraulic fluid between upper end part and the piston rod, be formed with the earial drainage groove on the surface of buffer block, this earial drainage groove upwards extends from the lower tip of buffer block, the outside at the buffer block can be established to the upper end part of barrel casing, and this moment, the intercommunication passageway between the working chamber of oil pocket and cylinder is inj. The rebound buffering structure of the shock absorber has a long buffering stroke, and can improve the riding comfort of a vehicle while avoiding the impact inside the shock absorber.

Description

Rebound buffering structure of shock absorber and shock absorber

Technical Field

The disclosure relates to the technical field of shock absorbers, in particular to a restoration buffer structure of a shock absorber and the shock absorber.

Background

During the running of the vehicle, the shock absorber on the vehicle damps the impact load of the ground through reciprocating motion. During the process that the shock absorber is in a rebound stroke, such as wheel bounce, a shock absorber rebound buffering block is often required to be arranged on a piston rod in the shock absorber so as to prevent the shock absorber from being damaged due to hard impact generated during the maximum stroke of the shock absorber.

The existing restoration buffer block generally performs buffering in the restoration stroke of the shock absorber through elastic deformation of materials and structural characteristics of the shock absorber, and the buffering stroke is short, so that the shock absorber is easy to generate impact when a vehicle passes through a bank and a pit, and the riding comfort of the vehicle is further poor.

SUMMERY OF THE UTILITY MODEL

The purpose of the present disclosure is to provide a rebound cushioning structure of a shock absorber, which has a long cushioning stroke and can improve the riding comfort of a vehicle while avoiding the occurrence of a shock inside the shock absorber, and a shock absorber.

In order to achieve the above object, the present disclosure provides a rebound buffering structure of a shock absorber, the rebound buffering structure of the shock absorber is disposed in a cylinder of the shock absorber and located between an upper end of the cylinder and a piston rod, the rebound buffering structure includes a buffer block and a sleeve, the buffer block is fixed to the cylinder, the piston rod passes through the buffer block, the sleeve is sleeved on the piston rod below the buffer block, and a lower end portion of the sleeve is fixed to the piston rod, an inner diameter of an upper end portion of the sleeve is larger than a diameter of the piston rod, so that an oil chamber for accommodating hydraulic oil is formed between the upper end portion and the piston rod, a drainage groove is formed on an outer surface of the buffer block, the drainage groove extends upward from the lower end of the buffer block, and an upper end portion of the sleeve can be sleeved outside the buffer block, and at this time, the inner surface of the sleeve and the drain groove define a communication passage between the oil chamber and the working chamber of the cylinder tube.

Optionally, the size of the cross section of the drainage groove is gradually reduced from bottom to top; and/or the presence of a gas in the gas,

the cross section of the drainage groove is V-shaped.

Optionally, the bleed groove extends parallel to an axis of the shock absorber.

Optionally, the number of the drainage grooves is plural, and the plurality of the drainage grooves are arranged at intervals in the circumferential direction of the buffer block.

Alternatively, the lower end portion and the upper end portion are connected by a stepped portion configured to be substantially perpendicular to an axis of the piston rod.

Optionally, the upper edge of the upper end portion is formed with a flange.

Optionally, the upper end portion is configured as a straight cylinder.

Optionally, a guide sleeve is arranged in the upper end of the cylinder barrel, the piston rod penetrates through the guide sleeve, and the buffer block is fixed on the guide sleeve.

Optionally, the guide sleeve is fixed to the cylinder barrel, and the buffer block is detachably connected to the guide sleeve through a rotary clamping structure.

On the basis of the scheme, the shock absorber is provided with the restoring buffering structure of the shock absorber.

Through the technical scheme, in the rebound buffering structure of the shock absorber provided by the disclosure, the buffering block is fixed at the upper end in the cylinder barrel of the shock absorber, the piston rod in the cylinder barrel penetrates through the buffering block, the cylinder sleeve below the buffering block is sleeved on the piston rod, the lower end part of the cylinder sleeve is fixed on the piston rod, when the piston rod in the cylinder barrel moves towards the upper end, the piston rod drives the cylinder sleeve to move upwards together, the buffering block enters an oil cavity formed by the upper end part of the cylinder sleeve and the piston rod along with continuous upward movement of the cylinder sleeve, in the upward movement process of the cylinder sleeve, oil in the cylinder barrel enters the oil cavity, when the buffering block is contacted with the oil in the oil cavity, the buffering block compresses the oil in the oil cavity, so that the establishment of force is completed, the hydraulic buffering structure is formed in the cylinder barrel by utilizing the buffering block and the cylinder sleeve, the buffering stroke of the hydraulic buffering structure is much longer than that of, thereby improving the riding comfort of the vehicle while avoiding the impact inside the shock absorber. In addition, be provided with the earial drainage groove that upwards extends from the lower extreme of buffer block on the buffer block surface, on the one hand can be used to when the barrel casing moves the cover and establishes on the buffer block, the internal surface of barrel casing and earial drainage groove form the intercommunication passageway between the working chamber of oil pocket and cylinder for fluid in the oil pocket can get into the working chamber of cylinder through this intercommunication passageway, and on the other hand can be used to avoid the condition that incomplete separation appears in the internal surface of buffer block and barrel casing.

Additional features and advantages of the disclosure will be set forth in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:

FIG. 1 is a schematic structural diagram illustrating a rebound damping configuration for a shock absorber in accordance with an embodiment of the present disclosure;

FIG. 2 is a perspective view of a guide sleeve in a rebound damping arrangement for a shock absorber according to an embodiment of the present disclosure;

FIG. 3 is a perspective view of a cushion block in a rebound cushioning arrangement for a shock absorber according to an embodiment of the present disclosure;

FIG. 4 is a cross-sectional structural schematic view of a snubber block in a rebound damping configuration for a shock absorber provided in accordance with an embodiment of the present disclosure;

FIG. 5 is a cross-sectional view of a guide sleeve and a damping mass in a connected state in a rebound damping configuration for a shock absorber according to an embodiment of the present disclosure;

FIG. 6 is a perspective view of a sleeve in a rebound cushioning arrangement for a shock absorber according to an embodiment of the present disclosure;

FIG. 7 is a cross-sectional structural view of the sleeve in a rebound cushioning configuration of a shock absorber provided in accordance with an embodiment of the present disclosure, showing a stepped portion;

FIG. 8 is a jounce stroke illustration of a rebound damping arrangement for a shock absorber provided in accordance with an embodiment of the present disclosure, wherein the jounce stroke of the bellows sleeve is illustrated.

Description of the reference numerals

1-cylinder barrel, 2-guide sleeve, 21-first connecting structure, 211-outer flange clamping foot, 2111-wedge-shaped platform, 2112-outer flange clamping groove, 212-mounting opening, 3-piston rod, 4-buffer block, 41-drainage groove, 411-opening, 42-second connecting structure, 421-inner flange clamping foot, 422-inner flange clamping groove, 5-cylinder sleeve, 51-lower end part, 52-upper end part, 521-flanging, 53-oil cavity, 54-step part and 541-bottom surface.

Detailed Description

The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.

In the present disclosure, unless otherwise stated, the terms of orientation such as "upper and lower" are generally defined with reference to the orientation of the shock absorber provided in the present disclosure in normal use, specifically, the direction in which the shock absorber is close to the vehicle body is taken as the upper direction, and the direction in which the shock absorber is close to the vehicle wheel is taken as the lower direction. "inner and outer" refer to the inner and outer contours of the component itself; the use of the terms first, second, etc. are intended to distinguish one element from another without order or importance. Furthermore, in the following description, when referring to the figures, the same reference numbers in different figures denote the same or similar elements, unless otherwise explained. The foregoing definitions are provided to illustrate and describe the present disclosure only and should not be construed to limit the present disclosure.

According to an embodiment of the present disclosure, there is provided a rebound buffering structure of a shock absorber, as shown in fig. 1 to 7, which is disposed in a cylinder 1 of the shock absorber and between an upper end of the cylinder 1 and a piston rod 3, the rebound buffering structure including a cushion block 4 and a sleeve 5, the cushion block 4 being fixed to the cylinder 1, the piston rod 3 passing through the cushion block 4, the sleeve 5 being sleeved on the piston rod 3 below the cushion block 4, and a lower end portion 51 of the sleeve 5 being fixed to the piston rod 3, an inner diameter of an upper end portion 52 of the sleeve 5 being larger than a diameter of the piston rod 3 such that an oil chamber 53 accommodating hydraulic oil is formed between the upper end portion 52 and the piston rod 3, a relief groove 41 being formed on an outer surface of the cushion block 4, the relief groove 41 extending upward from the lower end of the cushion block 4, the upper end portion 52 of the sleeve 5 being capable of being sleeved on an outer side of the cushion block 4, and at this time, the inner surface of the sleeve 5 and the drain groove 41 define a communication passage between the oil chamber 53 and the working chamber of the cylinder tube 1.

Through the technical scheme, in the rebound buffering structure of the shock absorber provided by the disclosure, the buffer block 4 is fixed at the upper end in the cylinder barrel 1 of the shock absorber, the piston rod 3 in the cylinder barrel 1 penetrates through the buffer block 4, the barrel sleeve 5 below the buffer block 4 is sleeved on the piston rod 3, the lower end part 51 of the barrel sleeve 5 is fixed on the piston rod 3, when the piston rod 3 in the cylinder barrel 1 moves towards the upper end, the piston rod 3 drives the barrel sleeve 5 to move upwards together, along with the continuous upward movement of the barrel sleeve 5, the buffer block 4 enters the oil cavity 53 formed by the upper end part 52 of the barrel sleeve 5 and the piston rod 3, and in the upward movement process of the barrel sleeve 5, oil in the cylinder barrel 1 enters the oil cavity 53, and when the buffer block 4 is in contact with the oil in the oil cavity 53, the buffer block 4 compresses the oil in the oil cavity 53, so as to complete the establishment of force, and a hydraulic buffering structure is formed in the cylinder barrel 1 by the buffer, the hydraulic buffer structure has a buffer stroke which is much longer than that of the conventional common restoring buffer block, for example, as shown in fig. 8, compared with the conventional corrugated shock-proof sleeve, the hydraulic restoring buffer structure provided by the present disclosure has a buffer stroke which is much longer, so that the vehicle riding comfort can be improved while avoiding the occurrence of impact inside the shock absorber. In addition, be provided with on the surface of buffer block 4 and upwards extend the chute 41 from the lower extreme of buffer block 4, on the one hand can be used to when the barrel casing 5 moves to the cover and establishes on buffer block 4, the internal surface of barrel casing 5 and chute 41 form the intercommunication passageway between the working chamber of oil pocket 53 and cylinder 1 for fluid in the oil pocket 53 can get into the working chamber of cylinder 1 through this intercommunication passageway, on the other hand can be used to avoid buffer block 4 and the internal surface of barrel casing 5 to appear the condition of closely laminating totally.

In the specific embodiment that this disclosure provided, the size of the cross section of chute 41 is from up reducing gradually down, and when recovering the stroke, piston rod 3 moves gradually upwards, and barrel casing 5 moves to the buffer block 4 outside to effort between buffer block 4 and the barrel casing 5 internal surface is along with moving up of barrel casing 5 and crescent to can avoid the condition that the complete inseparable laminating appears in the internal surface of buffer block 4 and barrel casing 5.

Wherein the drainage groove 41 may be configured in any suitable manner. Alternatively, as shown in fig. 3, the cross section of the drainage groove 41 is V-shaped, and the drainage groove 41 is provided with an opening 411 at the lower end of the cushion block 4, the V-shaped drainage groove 41 extends upward from the opening 411 along the outer surface of the cushion block 4, and the size of the cross section gradually decreases. In other embodiments of the present disclosure, the drainage groove 41 may also have other configurations, such as a wedge shape, etc., for which the present disclosure is not limited in any way.

In the embodiment provided by the present disclosure, as shown in fig. 3, the drain groove 41 may extend parallel to the axis of the shock absorber to form, together with the inner surface of the sleeve 5, a communication passage between the oil chamber 53 and the working chamber of the cylinder tube 1 and parallel to the axis of the shock absorber, facilitating the guiding of the oil flow in the communication passage. Of course, the chute 41 may also extend on the bumper 4 in other extending manners to define, together with the inner surface of the sleeve 5, a communication passage between the oil chamber 53 and the working chamber of the cylinder 1, to which the present disclosure is not limited in any way.

In the specific implementation that this disclosure provided, the quantity of chute 41 can be a plurality of, and a plurality of chute 41 are at the upwards interval arrangement of circumference of buffer block 4, can guarantee on the one hand that the condition of laminating closely completely can be avoided appearing in the surface of the buffer block 4 that contacts the barrel casing 5 internal surface, and on the other hand can make the fluid in the oil pocket 53 can flow to cylinder 1 along the communicating channel uniformly to make buffer block 4 atress even. As shown in fig. 4, the present disclosure will be described by way of example with the number of the drainage grooves 41 being six, and the six drainage grooves 41 being arranged in the circumferential direction of the cushion block 4.

In the specific embodiment provided by the present disclosure, as shown in fig. 6 and 7, the lower end portion 51 of the barrel casing 5 and the upper end portion 52 of the barrel casing 5 are connected by a stepped portion 54, the stepped portion 54 being configured to be substantially perpendicular to the axis of the piston rod 3. Wherein, a bottom surface 541 is formed at the junction of the stepped portion 54 and the upper end portion 52 of the barrel housing 5, and when the lower end of the buffer block 4 abuts against the bottom surface 541, the stroke of the piston rod 3 reaches the maximum, that is, the reset position is reached.

In the embodiment provided by the present disclosure, as shown in fig. 6 and 7, the upper edge of the upper end portion 52 of the sleeve 5 is formed with a flange 521, and the flange 521 can be used to guide the buffer block 4 into the oil chamber 53 of the sleeve 5, so that the buffer block 4 compresses the oil in the oil chamber 53, and can increase the strength of the sleeve 5.

Wherein the upper end portion 52 may be configured in any suitable manner. Alternatively, as shown in fig. 6 and 7, the upper end portion 52 of the cartridge 5 may be configured in a straight cylindrical shape so as to form the largest oil chamber 53 for the return shock in cooperation with the cylinder tube 1. In other embodiments of the present disclosure, the upper portion 52 may have other configurations, and the present disclosure is not limited thereto.

In the specific embodiment provided by the present disclosure, as shown in fig. 1, fig. 2 and fig. 5, a guide sleeve 2 is disposed in an upper end of a cylinder 1, a piston rod 3 is inserted into the guide sleeve 2 for guiding a movement track of the piston rod 3, so as to prevent the movement track of the piston rod 3 from deviating, and a buffer block 4 is fixed to the guide sleeve 2.

In the specific implementation mode that this disclosure provided, as shown in fig. 1, fig. 2 and fig. 5, uide bushing 2 is fixed in cylinder 1, and in the buffer block 4 is fixed in cylinder 1 through uide bushing 2 promptly, buffer block 4 connects in uide bushing 2 through rotatory joint structure detachably, is convenient for on the one hand the installation and the fixed of buffer block 4 and uide bushing 2 in cylinder 1, and on the other hand can make things convenient for maintenance and the change in later stage. Of course, the guide sleeve 2 and the buffer block 4 can be connected in other manners, for example, the buffer block 4 is welded to the guide sleeve 2, which is not limited in this disclosure.

Wherein the rotary clamping structure may be configured in any suitable manner. Alternatively, as shown in fig. 2 to 5, the rotary clamping structure is configured as a first connecting structure 21 disposed at the lower end of the guide sleeve 2 and a second connecting structure 42 disposed at the upper end of the buffer block 4, wherein three outer flange clamping legs 211 are disposed on the first connecting structure 21 at intervals along the axial direction of the guide sleeve 2, a mounting opening 212 is formed between two adjacent outer flange clamping legs 211, an outer flange clamping groove 2112 is disposed on each of the three outer flange clamping legs 211, and a wedge-shaped table 2111 for guiding is disposed on each of the three outer flange clamping grooves 2112 along the same direction of the circumferential direction of the guide sleeve 2. Three inner flange clamping feet 421 are arranged on the second connecting structure 42 along the axial direction of the buffer block 4 at intervals, an inner flange clamping groove 422 is formed between every two adjacent inner flange clamping feet 421, the circumference of each inner flange clamping foot 421 is smaller than that of the mounting opening 212, the circumference of each inner flange clamping groove 422 is larger than that of each outer flange clamping foot 211, when the buffer block is mounted, each inner flange clamping foot 421 is aligned to the mounting opening 212, each outer flange clamping foot 211 is aligned to each inner flange clamping groove 422, and each inner flange clamping foot 421 is screwed into each outer flange clamping groove 2112 along the extending direction of the wedge-shaped boss 2111, so that the buffer block 4 and the guide sleeve 2 can be connected. In other embodiments of the present disclosure, the rotary clamping structure may also be configured in other ways, and the present disclosure is not limited thereto.

On the basis of the scheme, the disclosure also provides a shock absorber, and the shock absorber is provided with the restoration buffering structure of the shock absorber.

The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various combinations that are possible in the present disclosure are not described again.

In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.

Claims

1. A rebound buffering structure of a shock absorber, characterized in that the rebound buffering structure of the shock absorber is disposed in a cylinder (1) of the shock absorber and between an upper end of the cylinder (1) and a piston rod (3), the rebound buffering structure comprises a buffer block (4) and a sleeve (5), the buffer block (4) is fixed to the cylinder (1), the piston rod (3) passes through the buffer block (4), the sleeve (5) is sleeved on the piston rod (3) below the buffer block (4), and a lower end portion (51) of the sleeve (5) is fixed to the piston rod (3), an inner diameter of an upper end portion (52) of the sleeve (5) is larger than a diameter of the piston rod (3) so that an oil chamber (53) for containing hydraulic oil is formed between the upper end portion (52) and the piston rod (3), a drainage groove (41) is formed in the outer surface of the buffer block (4), the drainage groove (41) extends upwards from the lower end face of the buffer block (4), the upper end portion (52) of the barrel sleeve (5) can be sleeved on the outer side of the buffer block (4), and at the moment, the inner surface of the barrel sleeve (5) and the drainage groove (41) define a communication channel between the oil cavity (53) and the working cavity of the cylinder barrel (1).

2. The rebound buffering structure of the shock absorber as set forth in claim 1, wherein the size of the cross section of the bleed groove (41) is gradually reduced from bottom to top; and/or the presence of a gas in the gas,

the cross section of the drainage groove (41) is V-shaped.

3. The rebound cushioning structure of the shock absorber as set forth in claim 1, wherein said bleed groove (41) extends parallel to an axis of said shock absorber.

4. The rebound buffering structure of the shock absorber as set forth in claim 1, wherein the number of the drain grooves (41) is plural, and the plural drain grooves (41) are arranged at intervals in a circumferential direction of the cushion block (4).

5. The rebound cushioning structure of the shock absorber as set forth in claim 1, wherein the lower end portion (51) and the upper end portion (52) are connected by a stepped portion (54), the stepped portion (54) being configured to be substantially perpendicular to an axis of the piston rod (3).

6. The rebound cushioning structure of the shock absorber as set forth in claim 1, wherein an upper edge of said upper end portion (52) is formed with a burring (521).

7. The rebound cushioning structure of a shock absorber according to claim 1, wherein the upper end portion (52) is configured in a straight tubular shape.

8. The rebound buffering structure of the shock absorber as set forth in any one of claims 1 to 7, wherein a guide sleeve (2) is provided in an upper end of the cylinder tube (1), the piston rod (3) is inserted through the guide sleeve (2), and the buffer block (4) is fixed to the guide sleeve (2).

9. The rebound buffering structure of the shock absorber as set forth in claim 8, wherein the guide sleeve (2) is fixed to the cylinder tube (1), and the buffer block (4) is detachably connected to the guide sleeve (2) by a rotary snap structure.

10. A shock absorber characterized in that it is provided with a rebound damping structure of the shock absorber as set forth in any one of claims 1 to 9.