CN219840965U

CN219840965U - Separation assembly and damping adjustable shock absorber

Info

Publication number: CN219840965U
Application number: CN202321372202.XU
Authority: CN
Inventors: 余志明; 王刚; 林志团
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2023-05-31
Filing date: 2023-05-31
Publication date: 2023-10-17
Anticipated expiration: 2033-05-31

Abstract

The utility model provides a separation assembly and a damping adjustable shock absorber, wherein the separation assembly comprises a separation ring, the separation ring is used for being sleeved on the outer side of a working cylinder of the damping adjustable shock absorber, the separation ring comprises an inner ring part and an outer ring part, and the inner circumferential surface of the inner ring part is used for being close to the outer circumferential surface of the working cylinder; the outer ring part is sleeved on the outer side of the inner ring part, and the outer circumferential surface of the outer ring part is used for being close to the inner wall of the shell of the damping adjustable shock absorber. According to the separation assembly, when the separation assembly is applied to the damping adjustable shock absorber, the inner ring part of the separation ring is close to the working cylinder, and the outer ring part of the separation ring is close to the inner wall of the shell of the damping adjustable shock absorber, so that the space between the working cylinder and the shell can be separated into two parts, and the damping adjustable shock absorber can realize the function of actively lifting the piston rod.

Description

Separation assembly and damping adjustable shock absorber

Technical Field

The present utility model relates generally to the technical field of vehicles, and more particularly to a partition assembly and a damping-adjustable shock absorber.

Background

The damping adjustable shock absorber in the related art includes two solenoid valve assemblies. The two solenoid valve assemblies are positioned at the side parts of the shock absorber and are respectively used for restoring damping force and adjusting compression damping force. However, the shock absorber in the related art belongs to a passive shock absorber, and cannot realize the active lifting function of the piston rod, and cannot meet the requirement of a vehicle on the active lifting function of the shock absorber.

Disclosure of Invention

In the summary, a series of concepts in a simplified form are introduced, which will be further described in detail in the detailed description. The summary of the utility model is not intended to define the key features and essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.

To at least partially solve the above-mentioned problems, a first aspect of the present utility model provides a spacer assembly for a damping adjustable shock absorber, the spacer assembly comprising a spacer ring for being sleeved outside a working cylinder of the damping adjustable shock absorber, the spacer ring comprising:

an inner ring portion having an inner peripheral surface for being brought into close contact with an outer peripheral surface of the cylinder; and

and the outer ring part is sleeved on the outer side of the inner ring part, and the outer circumferential surface of the outer ring part is used for being close to the inner wall of the shell of the damping adjustable shock absorber.

According to the separation assembly of the first aspect of the utility model, in the state that the separation assembly is applied to the damping adjustable shock absorber, the inner ring part of the separation ring is close to the working cylinder, and the outer ring part of the separation ring is close to the inner wall of the shell of the damping adjustable shock absorber, so that the space between the working cylinder and the shell can be separated into two parts, and the damping adjustable shock absorber can realize the function of actively lifting the piston rod.

Optionally, the spacer ring includes at least two outer ring portions, and the at least two outer ring portions are disposed at intervals along an axial direction of the spacer ring.

Optionally, a first seal groove is defined between the outer peripheral surfaces of two adjacent outer ring parts and the inner ring part,

the inner circumferential surface of the inner ring part is provided with a second sealing groove which is arranged along the circumferential direction,

the partition assembly further includes:

the first sealing ring is connected to the first sealing groove to seal a gap between the outer ring part and the shell; and

and the second sealing ring is connected with the second sealing groove to seal the gap between the inner ring part and the working cylinder.

Optionally, two ends of the inner ring part along the axial direction of the inner ring part protrude outside the outer ring part along the axial direction.

Optionally, the second seal groove is located between the two outer ring portions along the axial direction of the spacer ring.

Optionally, the inner ring portion includes an inner ring middle portion and two inner ring end portions, the inner ring middle portion is located between the two inner ring end portions along an axial direction of the spacer ring, an end portion of the inner ring middle portion is connected to the outer ring portion, and an outer diameter of the inner ring end portion is smaller than an outer diameter of the inner ring middle portion.

A second aspect of the present utility model provides a damping-adjustable shock absorber, comprising:

the oil storage cylinder assembly comprises a shell and a working cylinder positioned in the shell, wherein the working cylinder extends along the axial direction of the shell, and the shell is provided with a first oil passing hole and a second oil passing hole which are arranged at intervals along the axial direction; and

as described above, the partition member is located between the first oil passing hole and the second oil passing hole in the axial direction, the partition member is sleeved outside the working cylinder and is radially connected to the housing so as to partition the space between the working cylinder and the housing into a first chamber and a second chamber, the first chamber is fluidly connected to the outside of the housing via the first oil passing hole, and the second chamber is fluidly connected to the outside of the housing via the second oil passing hole.

According to the damping adjustable shock absorber of the second aspect of the utility model, the space between the working cylinder and the shell in the oil storage cylinder assembly is divided into two independent first cavities and second cavities by the separation assembly, and the first cavities and the second cavities are communicated to the outside of the shell through the first oil passing hole and the second oil passing hole respectively. In the state that the reservoir assembly is connected to the external hydraulic pump assembly, on the one hand, independent adjustment of damping forces of the first and second chambers is facilitated, and on the other hand, an active lifting function of the shock absorber can be facilitated.

Optionally, an interior of the working cylinder forms a working chamber;

the damping-adjustable shock absorber further includes:

a bottom valve located inside the housing, connected to an end of the working cylinder in the axial direction, and located on a side of the second oil passing hole facing away from the first oil passing hole in the axial direction; and

a piston rod assembly including a piston member located in the working chamber to divide the working chamber into a first working chamber and a second working chamber, the second working chamber being closer to the base valve than the first working chamber in the axial direction, the first working chamber being in fluid communication with the first chamber, the second working chamber being in fluid communication with the second chamber,

the base valve is configured such that:

when the resultant hydraulic force applied by the base valve is directed to the second working chamber, the base valve allows oil to flow from the second chamber into the second working chamber to push the piston rod assembly to rise; when the resultant hydraulic force applied to the bottom valve deviates from the second working chamber, the bottom valve allows oil to flow from the second working chamber into the second chamber so as to drive the piston rod assembly to descend.

Optionally, the damping adjustable shock absorber further comprises:

a first damping valve assembly connected to an outer side of the housing, the first damping valve assembly being in series between the first chamber and the first working chamber; and

and a second damping valve assembly connected to an outer side portion of the housing, the second damping valve assembly being connected in series between the second chamber and the second working chamber.

Optionally, the damping adjustable shock absorber further comprises:

a hydraulic pump assembly located outside the housing, the hydraulic pump assembly being in fluid communication with the first oil passage hole and the second oil passage hole, the hydraulic pump assembly being configured to pump oil to the first oil passage hole or the second oil passage hole and to withdraw oil from the first oil passage hole or the second oil passage hole;

a recuperated accumulator in series between the hydraulic pump assembly and the first chamber, the recuperated accumulator for storing oil; and

the compression energy accumulator is connected in series between the hydraulic pump assembly and the second cavity and is used for storing oil.

Optionally, the damping adjustable shock absorber further includes an oil pipe connecting block, the oil pipe connecting block is connected to the outside of the shell, a first oil inlet and outlet hole and a second oil inlet and outlet hole are formed in the oil pipe connecting block, the first oil inlet and outlet hole is communicated to the first oil passing hole, the second oil inlet and outlet hole is communicated to the second oil passing hole, the hydraulic pump assembly is connected to the first oil inlet and outlet hole through the recovery accumulator, and the hydraulic pump assembly is connected to the second oil inlet and outlet hole through the compression accumulator.

Optionally, the bottom valve includes:

the bottom valve body part is provided with a compression hole and a compensation hole;

a compression valve portion movably covered on the compression hole, the compression valve portion being configured to open the compression hole when a resultant hydraulic force applied thereto is directed away from the second working chamber in the axial direction so as to allow oil to flow from the second working chamber into the second chamber; and

and a compensating valve portion movably covered in the compensating hole, the compensating valve portion member being configured to open the compensating hole when a resultant hydraulic force is applied toward the second working chamber in the axial direction to allow oil to flow from the second chamber into the second working chamber.

Optionally, the piston member includes:

a piston body portion having a second through hole; and

and the circulation valve part is movably covered on the second through hole and is configured to open the second through hole when the hydraulic resultant force is applied to the circulation valve part to the first working cavity along the axial direction so as to allow oil to flow into the first working cavity from the second working cavity.

Optionally, the damping adjustable shock absorber further comprises:

the first middle cylinder is positioned in the first cavity and sleeved on the outer side of the working cylinder, the first middle cylinder is connected to the separation assembly along the axial direction, the first cavity is divided into a restoration cavity and a first middle cavity which are distributed in the radial direction by the middle cylinder, the restoration cavity is positioned on the outer side of the first middle cavity, the restoration cavity is in fluid communication with the first oil passing hole and the first middle cavity, and the first middle cavity is in fluid communication with the first working cavity; and

the second middle cylinder is located the second chamber and cover is located the outside of working cylinder, the second middle cylinder is followed the axial is connected to the separation subassembly with the bottom valve, the middle cylinder will the second chamber is divided into the compression chamber and the second middle chamber of radial arrangement, the compression chamber is located the outside of second middle chamber, compression chamber fluid communication extremely the second passes the oilhole with the second middle chamber, second middle chamber fluid communication extremely the second working chamber.

Optionally, one of the two ends of the inner ring part along the self axial direction is clamped between the first intermediate cylinder and the working cylinder, the other one of the two ends of the inner ring part along the self axial direction is clamped between the second intermediate cylinder and the working cylinder, and the outer ring part is connected between the first intermediate cylinder and the second intermediate cylinder.

Drawings

The following drawings of embodiments of the present utility model are included as part of the utility model. Embodiments of the present utility model and their description are shown in the drawings to explain the principles of the utility model. In the drawings of which there are shown,

FIG. 1 is a cross-sectional view of a damping tunable shock absorber according to a preferred embodiment of the present utility model;

FIG. 2 is a partial perspective view of the damping tunable shock absorber shown in FIG. 1;

FIG. 3 is a cross-sectional view of the base shown in FIG. 1; and

fig. 4 is a cross-sectional view of the partition assembly shown in fig. 1.

Reference numerals illustrate:

100: reservoir assembly 100a: restoring cavity

100b: first working chamber 100c: second working chamber

100d: first intermediate chamber 100e: compression chamber

100f: second intermediate chamber 110: bottom valve

111: base valve body portion 111b: compression hole

111c: compensating hole 112: compensation valve part

113: compression valve portion 120: shell body

121: reservoir 122: base seat

122a: the first oil passing hole 122b: second oil passing hole

122c: the recovery oil passing hole 122d: compression oil passing hole

122e: port 122f: convex ring

123: threaded sleeve 124: sealing end cover

125: bottom cover 130: first intermediate cylinder

130a: the first intermediate oil passing hole 131: second intermediate cylinder

131a: the second intermediate oil passing hole 140: working cylinder

140a: the first working oil passing hole 140b: the second working oil passing hole

150: connection block 150a: first oil inlet and outlet hole

150b: the second oil inlet and outlet hole 160: first valve seat

161: second valve seat 170: guide sleeve

171: oil seal assembly 180: partition assembly

181: spacer ring 181a: inner ring part

181b: outer ring portion 181c: first seal groove

181d: second seal groove 181e: first spigot

181f: second spigot 182: first sealing ring

183: second seal ring 200: piston rod assembly

210: the lever member 220: piston component

221: piston body 221a: second through hole

222: flow valve portion 230: spacing component

250: cushioning member 300: first damper valve assembly

310: throttle valve 320: one-way valve

500b: oil outlet 510: second damping valve body

520: end cap 530: transition joint

530a: first through hole 600: hydraulic pump assembly

700: a recovery accumulator 710: compression accumulator

720: first oil pipe 730: second oil pipe

800: fork arm

Detailed Description

In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present utility model. It will be apparent, however, to one skilled in the art that embodiments of the utility model may be practiced without one or more of these details. In other instances, well-known features have not been described in detail in order to avoid obscuring the embodiments of the utility model.

In the following description, a detailed structure will be presented for a thorough understanding of embodiments of the present utility model. It will be apparent that embodiments of the utility model may be practiced without limitation to the specific details that are set forth by those skilled in the art.

It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model, as the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," and/or "including," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. The terms "upper", "lower", "front", "rear", "left", "right" and the like are used herein for illustrative purposes only and are not limiting.

Ordinal numbers such as "first" and "second" cited in the present utility model are merely identifiers and do not have any other meaning, such as a particular order or the like. Also, for example, the term "first component" does not itself connote the presence of "second component" and the term "second component" does not itself connote the presence of "first component".

Hereinafter, specific embodiments of the present utility model will be described in more detail with reference to the accompanying drawings, which illustrate representative embodiments of the present utility model and not limit the present utility model.

The present utility model provides a damping tunable shock absorber having a partition assembly 180.

The partition assembly 180 according to the present utility model will be described in detail with reference to the embodiment shown in fig. 4.

The spacer assembly 180 according to the present utility model may include a spacer ring 181. The spacer ring 181 is used to be sleeved outside the working cylinder 140 of the damping adjustable shock absorber, and is located between the working cylinder 140 and the housing 120. The spacer ring 181 may include an inner ring portion 181a and an outer ring portion 181b. The inner circumferential surface of the inner ring portion 181a is used to be close to the outer circumferential surface of the cylinder 140. The proximity here may be a clearance fit, a zero-stick fit, or an interference fit. The outer ring portion 181b is sleeved outside the inner ring portion 181 a. The outer circumferential surface of the outer ring portion 181b is used to be close to the inner wall of the housing 120 of the damping-adjustable shock absorber.

According to the partition assembly of the present utility model, in a state of being applied to the damping adjustable shock absorber, the inner ring portion 181a of the partition ring 181 is close to the working cylinder 140, and the outer ring portion 181b of the partition ring 181 is close to the inner wall of the housing 120 of the damping adjustable shock absorber, so that a space between the working cylinder 140 and the housing 120 can be divided into two parts, thereby helping to ensure that the damping adjustable shock absorber can realize a function of actively elevating the piston rod assembly.

Furthermore, the partition assembly 180 according to the present utility model may further include a sealing ring. At least one of the outer peripheral surface and the inner peripheral surface of the spacer ring 181 is provided with a seal groove extending in the circumferential direction of the spacer ring 181. The sealing ring is connected with the sealing groove. And the sealing ring positioned in the sealing groove can radially protrude out of the sealing groove. That is, the seal groove cannot accommodate the entire cross-sectional area of the seal ring. The portion protruding outside of the seal groove can be used to seal a radial gap between the spacer assembly 180 and the connected component. The spacer ring 181 may be a hard structure, and the seal ring may be a soft elastic structure such as rubber or silica gel. Through setting up the seal groove at the spacer ring 181 to set up the sealing washer, the sealing washer is connected at the seal groove, can seal the clearance between spacer ring 181 and the adjacent structure under the spacer ring 181 is in the installed state, in order to improve leakproofness and isolation effect.

For example, the outer circumferential surface of the spacer ring 181 is provided with a first seal groove 181c provided in the circumferential direction. The inner circumferential surface of the spacer ring 181 is provided with a second seal groove 181d provided in the circumferential direction. The seal rings may include a first seal ring 182 and a second seal ring 183. The first seal ring 182 is connected to the first seal groove 181c. The second seal ring 183 is connected to the second seal groove 181d. By providing the first seal groove 181c and the second seal groove 181d, and providing the first seal ring 182 in the first seal groove 181c and the second seal ring 183 in the second seal groove 181d, the sealing effect at the inner peripheral surface and the outer peripheral surface of the separator ring 181 can be increased, respectively.

Further, the spacer ring 181 may include an inner ring portion 181a and two outer ring portions 181b. The second seal groove 181d is provided on the inner circumferential surface of the inner ring portion 181 a. The outer ring portion 181b is sleeved outside the inner ring portion 181 a. The two outer ring portions 181b are disposed at intervals in the axial direction of the spacer ring 181. A first seal groove 181c is defined between the outer circumferential surfaces of the two outer ring portions 181b and the inner ring portion 181 a. When the separating ring 181 is installed in the shaft hole component, the two outer ring portions 181b can serve the purpose of initially separating two parts of the chambers separated by the separating ring 181 along the axial direction, and the two parts of the chambers are further sealed through the first sealing ring 182 between the two outer ring portions 181b, so that a better sealing effect is obtained.

For example, both ends of the inner ring portion 181a in the self axial direction protrude outside the outer ring portion 181b in the axial direction. The portion of the inner ring portion 181a axially protruding from the outer ring portion 181b may be adapted to be clamped in a radial gap between two nested components to achieve radial positioning. The two spaced outer ring portions 181b are capable of axially positioning two members arranged in the axial direction.

Alternatively, the second seal groove 181d is located between the two outer ring portions 181b in the axial direction of the spacer ring 181. This helps to reduce the size of the spacer ring 181 in the axial direction to some extent.

Illustratively, the inner ring portion 181a may include an inner ring middle portion (not labeled) and two inner ring end portions (not labeled). The middle of the inner ring is located axially of the spacer ring 181 between the ends of the two inner rings. The end of the inner ring middle portion is connected to the outer ring portion 181b. The two end portions of the inner ring middle portion in the axial direction are respectively and correspondingly connected to the two outer ring portions 181b. A first seal groove 181c is defined between the two outer ring portions 181b and the outer peripheral surface of the inner ring middle portion. The inner peripheral surface of the middle part of the inner ring is provided with a second sealing groove 181d. The outer diameter of the end part of the inner ring is smaller than that of the middle part of the inner ring. This ensures the structural strength of the inner ring middle portion, and also enables the formation of a spigot between the inner ring end portion and the outer ring portion 181b to better stop and limit the two members arranged at intervals in the axial direction.

The damping tunable shock absorber according to the present utility model will be described in detail with reference to the embodiments shown in fig. 1 to 4.

The damping-adjustable shock absorber according to the present utility model may include the reservoir cylinder 121 assembly 100 and the partition assembly 180 as described above. Reservoir 121 assembly 100 may include a housing 120, a working cylinder 140 and a base valve 110 positioned inside housing 120. The cylinder 140 is disposed to extend in the axial direction of the housing 120. One end of the cylinder 140 in the axial direction is connected to the housing 120. The other end of the cylinder 140 in the axial direction is connected to the base valve 110. A working chamber is formed between the inner circumferential surface of the working cylinder 140, the base valve 110 and the housing 120. The housing 120 is provided with first and second oil passing holes 122a and 122b disposed at intervals in the axial direction. The first and second oil passing holes 122a and 122b are used to connect the external hydraulic pump assembly 600, respectively. And the second oil passing hole 122b is axially located between the first oil passing hole 122a and the bottom valve 110. The partition assembly 180 is axially located between the first and second oil passing holes 122a and 122b. The partition assembly 180 is sleeved outside the cylinder 140 and is connected to the housing 120 in a radial direction. The partition assembly 180 serves to partition a separation space between the cylinder 140 and the housing 120 into a first chamber and a second chamber. The first chamber is in fluid communication with the outside of the housing 120 via the first oil passing hole 122 a. And the second chamber is fluidly connected to the outside of the housing 120 via the second oil passing hole 122b.

According to the damping-adjustable shock absorber of the present utility model, the space between the working cylinder 140 and the housing 120 in the reservoir cylinder 121 assembly 100 is divided into two independent first and second chambers by using the partition assembly 180, and the first and second chambers are respectively communicated to the outside of the housing 120 through the first and second oil passing holes 122a and 122 b. This is advantageous in that independent adjustment of damping forces of the first and second chambers is facilitated on the one hand, and in that an active lifting function of the shock absorber can be facilitated in a state in which the reservoir cylinder 121 assembly 100 is connected to the external hydraulic pump assembly 600. The first cavity and the second cavity are separated from each other, so that problems of hydraulic short circuit, abnormal lifting function and the like can be effectively prevented in the process of adjusting the active lifting of the shock absorber.

Furthermore, the damping adjustable shock absorber may further comprise a piston rod assembly 200. The piston rod assembly 200 includes a piston member 220. The piston member 220 is located in the working chamber to divide the working chamber into a first working chamber 100b and a second working chamber 100c. Second working chamber 100c is axially closer to base valve 110 than first working chamber 100 b. First working chamber 100b is in fluid communication with the first chamber. Second working chamber 100c is in fluid communication with the second chamber. The foot valve 110 is configured such that: when the resultant hydraulic force experienced by base valve 110 is directed axially toward second working chamber 100c, base valve 110 allows oil to flow from the second chamber into second working chamber 100c to push piston rod assembly 200 upward. When the resultant hydraulic force experienced by base valve 110 is axially directed away from second working chamber 100c, base valve 110 allows oil to flow from second working chamber 100c into the second chamber to lower piston rod assembly 200. When the first and second oil passing holes 122a and 122b are connected to the external hydraulic pump assembly 600, the lifting of the piston rod assembly 200 is actively regulated by the hydraulic pump assembly 600, so that the active lifting of the piston rod assembly 200 can be achieved.

Further, the damping tunable shock absorber may further include a first damping valve assembly 300 and a second damping valve assembly. The first damping valve assembly 300 is connected to an outer side of the housing 120. First damping valve assembly 300 is serially connected between first chamber and first working chamber 100 b. The second damping valve assembly is connected to an outer side of the housing 120. The second damping valve assembly is connected in series between the second chamber and the second working chamber 100 c. By providing the first damping valve assembly 300 and the second damping valve assembly, the damping force applied to the piston rod assembly 200 in the axial direction can be adjusted, thereby achieving the purpose of adjusting the speed of the piston rod assembly 200 in the axial direction.

In addition, the shock absorber may also include a hydraulic pump assembly 600. The hydraulic pump assembly 600 is located outside of the housing 120. The hydraulic pump assembly 600 is fluidly connected to the first and second oil passing holes 122a and 122b. The hydraulic pump assembly 600 is used to pump oil to the first or second oil passing hole 122a or 122b and to pump oil from the first or second oil passing hole 122a or 122b. The hydraulic pump assembly 600 pumps the oil to the first oil passing hole 122a or pumps the oil from the second oil passing hole 122b, so that a positive pressure difference from the first working chamber 100b to the second working chamber 100c can be generated at the piston member 220, thereby assisting in pushing the piston member 220 to move towards a direction approaching the second space, and further achieving the purpose of actively retracting the piston rod assembly 200. The process of pumping oil to the first oil passing hole 122a by the hydraulic pump assembly 600 and the process of pumping oil from the second oil passing hole 122b by the hydraulic pump assembly 600 may be performed simultaneously. The hydraulic pump assembly 600 pumps the oil to the second oil passing hole 122b or pumps the oil from the first oil passing hole 122a, so that a positive pressure difference from the second working chamber 100c to the first working chamber 100b can be generated at the piston member 220, thereby assisting in pushing the piston member 220 to move in a direction away from the second space, and further achieving the purpose of actively extending the piston rod assembly 200. The process of pumping oil to the second oil passing hole 122b by the hydraulic pump assembly 600 and the process of pumping oil from the first oil passing hole 122a by the hydraulic pump assembly 600 may be performed simultaneously.

In addition, the shock absorber may also include a rebound accumulator 700 and a compression accumulator 710. The recuperative accumulator 700 is connected in series between the hydraulic pump assembly 600 and the first chamber. The recuperation accumulator 700 is used to store oil. For example, the recovery accumulator 700 may be used to temporarily store oil output from the first oil passing hole 122a to the outside of the housing 120. For another example, the rebound accumulator 700 may be used to temporarily store oil drawn from the second oil passing hole 122b by the hydraulic pump assembly 600. Alternatively, the recovery accumulator 700 may be used to temporarily store the oil outputted from the first oil passing hole 122a to the outside of the housing 120, or to temporarily store the oil drawn from the second oil passing hole 122b by the hydraulic pump assembly 600. A compression accumulator 710 is connected in series between the hydraulic pump assembly 600 and the second chamber, the compression accumulator 710 being configured to store oil. For example, the compression accumulator 710 may be used to temporarily store oil output from the second oil passing hole 122b to the outside of the housing 120. For another example, the compression accumulator 710 may be used to temporarily store oil drawn from the first oil passage hole 122a by the hydraulic pump assembly 600. Alternatively, the compression accumulator 710 may be used to temporarily store the oil outputted from the second oil passing hole 122b to the outside of the housing 120, or to temporarily store the oil drawn from the first oil passing hole 122a by the hydraulic pump assembly 600.

Optionally, the shock absorber may include at least one rebound accumulator 700. At least one of the at least one recovery accumulators 700 is located outside the housing 120 and is connected in series between the first oil passing hole 122a and the hydraulic pump assembly 600. The compression accumulator 710 is located outside the housing 120 and is connected in series between the second oil passing hole 122b and the hydraulic pump assembly 600. This helps to reduce the occupation of the inner space of the case 120, thereby helping to improve the utilization of the inner space of the case 120 and to achieve miniaturization of the outer dimensions of the reservoir assembly 100.

For example, the base valve 110 may include a base valve body portion 111, a compression valve portion 113, and a compensation valve portion 112. The bottom valve body portion 111 is provided with a compression hole 111b and a compensation hole 111c. The compression valve portion 113 is movably covered in the compression hole 111b. The compression valve portion 113 is configured to open the compression hole 111b when the hydraulic pressure applied thereto is resultant to deviate from the second working chamber 100c in the axial direction to allow oil to flow from the second working chamber 100c into the second chamber. The compensation valve portion 112 is movably covered on the compensation hole 111c. The compensating valve portion 112 member is configured to open the compensating bore 111c when subjected to a resultant hydraulic force in the axial direction toward the second working chamber 100c to allow oil to flow from the second chamber into the second working chamber 100c. The compensating valve portion 112 is configured to close the compensating bore 111c when the resultant hydraulic force is applied axially away from the second working chamber 100c. Compression valve portion 113 is capable of providing overload protection during quick retraction of piston rod assembly 200. The compression hole 111b is in parallel connection with the compensation hole 111c, and when the base valve 110 receives hydraulic resultant force toward the first space, oil in the compression chamber 100e can flow into the working cylinder 140 through the compensation hole 111 c; when the resultant hydraulic force is applied to the base valve 110 toward the second space, the oil in the cylinder 140 may flow into 530a through the compression hole 111b, then into the second damping valve assembly 500, and then into the compression chamber 100e after being throttled by the second damping valve assembly 500. The base valve 110 is understood to be formed by connecting two check valves in parallel, allowing oil to flow in both directions, with only different flow paths for each flow direction.

For example, the shock absorber may include a transition joint 530. The transition joint 530 is at least partially located in the second cavity, such as extending into the second cavity. The axial direction of the transition joint 530 in the installed state intersects the axial direction of the housing 120. The transition joint 530 is provided with a first through hole 530a penetrating in the axial direction. And the first through-hole 530a is in fluid communication with the second working chamber 100c. The hole depth direction of the first through hole 530a intersects the axial direction. The second damping valve assembly 500 includes an oil inlet hole (not shown) and an oil outlet hole 500b. The oil inlet is used for flowing in oil. The oil outlet 500b is for discharging oil. The oil inlet hole is in fluid communication with the first through hole 530a and the second working chamber 100c.

Further, the second damping valve assembly 500 and the transition joint 530 may be detachably connected by abutting each other in the axial direction or the like. Alternatively, second damping valve assembly 500 and transition joint 530 may be fixedly coupled by welding or the like. That is, the transition joint 530 is connected to the second damping valve assembly 500, or the transition joint 530 and the second damping valve assembly 500 are integrally constructed.

In the illustrated example, the second damping valve assembly 500 may include an end cap 520. The end cap 520 is configured as a ring. The oil inlet is at least partially located in the end cap 520. One axial end of the transition joint 530 abuts the end cap 520, and the other axial end of the transition joint 530 is directly or indirectly connected to the cylinder 140. Thus, the second working chamber 100c is in fluid communication with the second damping valve assembly 500 via the first through hole 530a, the oil inlet hole in turn.

In an example not shown, transition joint 530 may be part of second damping valve assembly 500. For example, transition joint 530 may be integrally constructed with end cap 520 as described above, or both may be fixedly attached.

For example, the piston member 220 may include a piston body portion 221 and a flow valve portion 222. The piston body 221 has a second through hole 221a. The flow valve portion 222 is movably disposed in the second through hole 221a. The flow valve portion 222 is configured to open the second through hole 221a when subjected to a resultant hydraulic pressure in the axial direction toward the first working chamber 100b, to allow oil to flow from the second working chamber 100c into the first working chamber 100b. By providing the second through hole 221a and the flow valve portion 222, the second working chamber 100c and thus the working cylinder 140 can be protected from overload, thereby preventing the second working chamber 100c from being overloaded during the rapid retraction of the piston rod assembly 200.

In addition, the shock absorber may further include a first intermediate cylinder 130 and a second intermediate cylinder 131. The first intermediate cylinder 130 is located in the first chamber and is sleeved outside the working cylinder 140. The first intermediate cylinder 130 is axially connected to the partition assembly 180. The intermediate cylinder divides the first chamber into a recovery chamber 100a and a first intermediate chamber 100d arranged in a radial direction. The recovery chamber 100a is located outside the first intermediate chamber 100d. The recovery chamber 100a is in fluid communication with the first oil passage hole 122a and the first intermediate chamber 100d. First intermediate chamber 100d is in fluid communication with first working chamber 100b. The second intermediate cylinder 131 is located in the second chamber and is sleeved outside the working cylinder 140. Second intermediate cylinder 131 is axially connected to partition assembly 180 and base valve 110. The intermediate cylinder divides the second chamber into a radially arranged compression chamber 100e and a second intermediate chamber 100f. The compression chamber 100e is located outside the second intermediate chamber 100f. The compression chamber 100e is fluidly connected to the second oil passing hole 122b and the second intermediate chamber 100f. The second intermediate chamber 100f is in fluid communication with the second working chamber 100c.

Further, the first intermediate cylinder 130 is provided with a first intermediate oil passing hole 130a. The first intermediate oil passing hole 130a is connected to the first damping valve assembly 300 to fluidly communicate the first damping valve assembly 300 to the first intermediate chamber 100d. The second intermediate cylinder 131 is provided with a second intermediate oil passing hole 131a. The second intermediate oil passing hole 131a is connected to the transition joint 530. The working cylinder 140 is provided with a first working oil passing hole 140a and a second working oil passing hole 140b. The first working oil passing hole 140a communicates to the first working chamber 100b and the first intermediate chamber 100d. The second working oil passing hole 140b communicates with the second working chamber 100c and the second intermediate chamber 100f.

For example, the separation assembly 180 may include a separation ring 181, a first seal ring 182, and a second seal ring 183. The spacer ring 181 is sleeved outside the working cylinder 140. The first seal groove 181c provided in the circumferential direction is provided on the outer circumferential surface of the spacer ring 181. The inner circumferential surface of the spacer ring 181 is provided with a second seal groove 181d provided in the circumferential direction. A first seal ring 182 is connected to the first seal groove 181c to seal a gap between the spacer ring 181 and the housing 120. The second seal ring 183 is connected to the second seal groove 181d to seal the gap between the spacer ring 181 and the cylinder 140.

Further, the spacer ring 181 includes an inner ring portion 181a and two outer ring portions 181b. The second seal groove 181d is provided on the inner circumferential surface of the inner ring portion 181 a. The outer ring portion 181b is sleeved outside the inner ring portion 181 a. The two outer ring portions 181b are disposed at intervals in the axial direction. A first seal groove 181c is defined between the outer circumferential surfaces of the two outer ring portions 181b and the inner ring portion 181 a. And both ends of the inner ring portion 181a in the axial direction thereof protrude outside the outer ring portion 181b in the axial direction thereof, respectively. A first spigot 181e is formed between the portion of the inner ring portion 181a facing the first intermediate chamber 100d and the adjacent outer ring portion 181b. The first spigot 181e cooperates with an end stop of the first intermediate cylinder 130 towards the second intermediate cylinder 131. The axially extending surface of the first spigot 181e abuts against the inner peripheral surface of the first intermediate cylinder 130. The radially extending surface of the first spigot 181e abuts the end face of the first intermediate cylinder 130. A second spigot 181f is formed between the portion of the inner ring portion 181a facing the second intermediate chamber 100f and the adjacent outer ring portion 181b. The second spigot 181f cooperates with an end stop of the second intermediate cylinder 131 towards the first intermediate cylinder 130. The axially extending surface of the second spigot 181f abuts against the inner peripheral surface of the second intermediate cylinder 131. The radially extending surface of the second spigot 181f abuts against the end face of the second intermediate cylinder 131.

Alternatively, the spacer ring may comprise an inner ring portion 181a and two outer ring portions 181b. The second seal groove is provided on the inner circumferential surface of the inner ring portion 181 a. The outer ring portion 181b is sleeved outside the inner ring portion 181 a. The two outer ring portions 181b are disposed at intervals in the axial direction of the spacer ring. A first seal groove is defined between the outer circumferential surfaces of the two outer ring portions 181b and the inner ring portion 181 a. Wherein, both ends of the inner ring portion 181a along the axial direction thereof protrude outside the outer ring portion 181b along the axial direction thereof. One of the two end portions of the inner ring portion 181a in the self-axial direction is interposed between the first intermediate cylinder 130 and the working cylinder 140. The other of the two end portions of the inner ring portion 181a in the self-axial direction is interposed between the second intermediate cylinder 131 and the working cylinder 140. That is, one of the two inner ring ends is sandwiched between the first intermediate cylinder 130 and the working cylinder 140. The other of the two inner ring ends is sandwiched between the second intermediate cylinder 131 and the working cylinder 140. Wherein the first intermediate cylinder 130 and the second intermediate cylinder 131 are located outside the two outer ring portions 181b, respectively, in the axial direction of the housing. And the first intermediate cylinder 130 and the second intermediate cylinder 131 are respectively abutted to the adjacent outer ring portions 181b.

In addition, the damping-adjustable shock absorber may further include a guide sleeve 170. The guide sleeve 170 is connected to the working cylinder 140 and is located axially on the side of the piston member 220 facing away from the base valve 110. The piston member 220 is axially located between the guide sleeve 170 and the base valve 110. The piston rod assembly 200 may further include a rod member 210 and a stop member 230. The lever member 210 is movably inserted through the guide sleeve 170 in the axial direction of the housing 120. The stopper member 230 is sleeved outside the lever member 210. The stop member 230 is axially located between the piston member 220 and the guide sleeve 170. And the stopper member 230 is disposed at a distance from the piston member 220 in the axial direction. The radially outer dimension of the stop member 230 is smaller than the radially inner dimension of the cylinder 140. The axial movement of the lever member 210 can be guided by providing the guide sleeve 170. By providing the stop member 230, the piston member 220 may be prevented from fully compressing the first working chamber 100b when moving axially away from the base valve 110 to the extreme position, i.e. ensuring that the first working chamber 100b is always present. Similarly, the piston rod assembly 200 may also include another stop structure (not shown). The limiting structure is located in the second working chamber 100c and is connected to the rod member 210 for preventing the piston member 220 from fully compressing the second working chamber 100c when moving axially toward the base valve 110 to the limit position, thereby ensuring that the second working chamber 100c is always present.

Further, the piston rod assembly 200 may further include a damping member 250. The buffer member 250 is located at a side of the limit member 230 axially facing away from the bottom valve 110 and fixed with respect to the limit member 230. The buffer member 250 is constructed in a soft elastic structure. The soft elastic structure can be one of rubber, silicon rubber, silica gel and other materials.

For example, the housing 120 has axially opposite first and second ends. The rod member 210 of the piston rod assembly 200 is connected to the piston member 220 and protrudes axially outside the first end of the housing 120. The shock absorber also includes a yoke 800. Yoke 800 is connected to a second end of housing 120.

In the illustrated example, the yoke 800 is configured as a U-shaped member. The U-shaped member includes a middle portion and two oppositely disposed side portions. The intermediate portion is secured to an end of the second end of the housing 120. The two side portions extend away from the housing 120 in the axial direction of the housing 120. The side portions are provided with connecting holes for mounting to a vehicle by fasteners.

In addition, the shock absorber may further include a spring support (not shown). The spring support seat is sleeved outside the shell 120. In the axial direction, the first damping valve assembly 300 is located between the spring support and the partition assembly 180 and closer to the partition assembly 180. The spring support is used for limiting the axial position of the damping spring sleeved on the outer side of the shell 120.

For example, both the first damping valve assembly 300 and the second damping valve assembly 500 may include a throttle valve. At least one of the first damping valve assembly 300 and the second damping valve assembly 500 includes a one-way valve.

Further, the first damping valve assembly 300 may include a check valve 320 and a throttle valve 310 connected in parallel with each other. The check valve 320 and the throttle valve 310 connected in parallel constitute a combined valve. The combination valve is connected in series between the first working oil passing hole 140a of the working cylinder 140 and the recovery oil passing hole 122c of the housing 120 such that the first working chamber 100b is fluidly connected to the first chamber or a recovery chamber 100a to be mentioned later via the combination valve. The check valve 320 allows oil to flow from the recovery chamber 100a into the first working chamber 100b via the intermediate chamber. The throttle valve 310 throttles oil flowing from the first working chamber 100b to the recovery chamber 100a through the intermediate chamber. The second damper valve assembly 500 includes a throttle valve. The throttle valve is connected in series between the second working oil passing hole 140b of the working cylinder 140 and the compression oil passing hole 122d of the housing 120. The throttle valve throttles oil flowing through.

Alternatively, the first damping valve assembly 300 and the second damping valve assembly 500 may alternatively employ solenoid valves having corresponding functions. The purpose of adjusting the damping force and the active lifting speed of the piston rod can be achieved by controlling the throttling performance of the first damping valve assembly 300 and the second damping valve assembly 500.

The shock absorber according to the present embodiment will be further described with reference to fig. 1 to 4 again.

The shock absorber provided by the utility model is provided with the first damping valve assembly 300 and the second damping valve assembly 500 for respectively adjusting damping force, the second damping valve assembly 500 is arranged at the side part of the shock absorber, the first damping valve assembly 300 is also arranged at the side part of the shock absorber, and the first damping valve assembly 300 and the second damping valve assembly 500 are arranged up and down along the central axis direction of the shock absorber. The utility model is provided with a separating ring 181, the central axis of the separating ring 181 is parallel to the central axis of the shock absorber, the inner ring surface of the separating ring 181 is matched with the shaft hole of the outer circumferential surface of the working cylinder 140, the outer circumferential surface of the outer ring part 181b is matched with the shaft hole of the inner circumferential surface of the convex ring 122f on the inner side of the base 122, the separating ring 181 separates the restoring cavity 100a and the compressing cavity 100e into two independent cavities, and the separating ring 181 also separates the first middle cavity 100d and the second middle cavity 100f into two independent cavities. The first oil inlet and outlet hole 150a is led out from the recovery chamber 100a, the second oil inlet and outlet hole 150b is led out from the compression chamber 100e, and the first oil inlet and outlet hole 150a and the second oil inlet and outlet hole 150b are respectively distributed on the upper and lower sides of the spacer ring 181 along the central axis direction of the shock absorber. The first damping valve assembly 300 and the second damping valve assembly 500 are respectively distributed on the upper and lower sides of the separation ring 181 in the direction of the center axis of the shock absorber, and the restoring chamber 100a and the compressing chamber 100e are respectively distributed on the upper and lower sides of the separation ring 181 in the direction of the center axis of the shock absorber. The present utility model includes one hydraulic pump and two accumulators, the hydraulic pump assembly 600 is disposed between the recovery chamber 100a and the compression chamber 100e through an external oil pipe connection, the recovery accumulator 700 is disposed in series between the recovery chamber 100a and the hydraulic pump assembly 600, the compression accumulator 710 is disposed in series between the compression chamber 100e and the hydraulic pump assembly 600, and at least one compression accumulator 710 is disposed outside the shock absorber. The accumulator may be disposed within the recovery chamber 100a or alternatively the accumulator may be disposed outside of the shock absorber.

According to the shock absorber of the present utility model, the reservoir assembly 100 includes a reservoir 121, a yoke 800, a base 122, a bottom cover 125, a first valve seat 160, a second valve seat 161, and a tubing connection block 150. The components connected with each other can be connected by welding.

The piston rod assembly 200 may include a piston member 220, a stopper member 230, a buffer member 250, a guide sleeve 170, an oil seal assembly 171, and a rod member 210. The working cylinder 140, the first intermediate cylinder 130, the second intermediate cylinder 131, the base valve 110 and the compensating valve portion 112 constitute a working cylinder 140 base valve 110 combination. The cylinder 140 and the bottom valve 110 combination are mounted on the inner bottom surface of the bottom cover 125 through the bottom valve 110. The rod-piston assembly is fitted into the inner wall shaft hole of the cylinder 140 through the outer circumferential surface of the piston member 220. The outer circumferential surface of the guide sleeve 170 is matched with the inner wall shaft hole of the thread sleeve 123 and is sealed by a sealing ring. The seal end cap 124 is screwed tightly with the threaded sleeve 123 and presses the guide sleeve 170, thereby binding and locking the connecting rod piston assembly and the cylinder 140 bottom valve 110 assembly in the reservoir assembly 100.

The second intermediate joint is welded to the second intermediate cylinder 131 and communicates with the second intermediate chamber 100f of the second intermediate cylinder 131 through the second intermediate oil passing hole 131 a. The transition joint 530 mates with the second intermediate joint shaft bore and is sealed by a sealing ring. The bottom planar surface of the second valve seat 161 provides a limited support for the transition joint 530. The second damping valve assembly 500 is described using a solenoid valve as an example. The end cap 520 of the solenoid valve is in zero-fit engagement with the end face of the transition joint 530. The housing of the solenoid valve is zero-fit to the inner surface of the second valve seat 161 and is sealed by a seal ring. The inner surface of the gland is in threaded engagement with the outer surface of the second valve seat 161 and is sealed by a sealing ring. The end face of the gland compresses the end face of the solenoid valve, thereby binding the solenoid valve in the second valve seat 161. The solenoid valve solenoid is matched with the solenoid valve shaft hole and is locked in the solenoid valve through the clamp spring constraint.

The inner circumferential surface of the spacer ring 181 is fitted in the axial hole of the outer circumferential surface of the cylinder 140. A second sealing ring 183 is installed in the second sealing groove 181d of the separation ring 181 for sealing the cylinder 140 and the separation ring 181, thereby dividing the first intermediate chamber 100d and the second intermediate chamber 100f into two independent chambers. The lower end inner circular surface of the first intermediate cylinder 130 is fitted with the outer circular surface shaft hole of the inner ring portion 181 a. The shaft bore fit may be an interference fit to seal the first intermediate cylinder 130 and the spacer ring 181. An inner circular surface of an upper end of the second intermediate cylinder 131 is fitted with an outer circular surface shaft hole of a lower end of the inner ring portion 181 a. The shaft bore fit is also an interference fit here to seal second intermediate cylinder 131 and spacer ring 181. The base 122 may be configured as a circular tube. The base 122 includes a port 122e for connecting to the reservoir 121. The inner surface of the base 122 is formed with a radially protruding collar 122f. The outer peripheral surface of the outer ring portion 181b is fitted in the inner peripheral surface shaft hole of the convex ring 122f. A first seal ring 182 is installed in the first seal groove 181c for sealing the outer circumferential surface of the spacer ring 181 and the inner circumferential surface of the base 122. The radial dimension of the inner peripheral surface of the convex ring 122f is smaller than the radial dimension of the inner peripheral surface of the rest of the base 122. The advantage of this is that the first seal 182 is prevented from being scratched by the hole edge of the base 122, such as the recovered oil passing hole 122c, the compressed oil passing hole 122d, the first oil passing hole 122a, the second oil passing hole 122b, etc., during the process of being inserted into the inner cavity of the base 122. The separation ring 181 separates the recovery chamber 100a from the compression chamber 100e into two separate chambers. The first damping valve assembly 300 is installed at the side of the reserve tube 121 and at the upper portion of the spacer ring 181. The first damping valve assembly 300 and the second damping valve assembly 500 are disposed at both sides of the separation ring 181 in the direction of the central axis of the shock absorber, respectively.

The tubing connection block 150 is attached to the base 122 and is connected by welding. The oil pipe connection block 150 is provided with a first oil inlet and outlet hole 150a and a second oil inlet and outlet hole 150b. The first oil inlet and outlet hole 150a is in aligned communication with the first oil passing hole 122 a. The second oil inlet and outlet hole 150b is in aligned communication with the second oil passing hole 122 b. One end of the first oil pipe 720 is connected to the first oil inlet/outlet hole 150a, and the other end is connected to one oil inlet/outlet hole of the hydraulic pump assembly. One end of the second oil pipe 730 is connected to the second oil inlet/outlet hole 150b, and the other end is connected to the other oil inlet/outlet hole of the hydraulic pump assembly. The compression accumulator 710 is disposed in series between the compression chamber 100e and the hydraulic pump assembly 600. The compression accumulator 710 is disposed outside the shock absorber. The rebound accumulator 700 may be disposed in series between the rebound chamber 100a and the hydraulic pump assembly 600 outside of the shock absorber. The recovery accumulator 700 may also be integrated in the form of an air bag built into the recovery chamber 100 a.

During the compression stroke, i.e., retraction, of piston rod assembly 200, piston member 220 moves in a direction toward base valve 110 and the volume of second working chamber 100c decreases. In this process, the oil in the second working chamber 100c flows into the second intermediate chamber 100f through the second working oil passing hole 140 b; and then flows into the transition joint 530 through the second intermediate oil passing hole 131 a; and then into a second damper valve assembly 500; the oil flows out of the oil outlet hole 500b into the compression chamber 100e after being throttled by the second damping valve assembly 500; and then flows into the second oil pipe 730 through the second oil inlet and outlet hole 150 b; and finally into the compression accumulator 710. During the compression stroke, the compression accumulator 710 absorbs and contains oil, and the piston member 220 moves in a direction approaching the base valve 110, which causes the volume of the first working chamber 100b to increase. In this process, the oil in the recovery chamber 100a may enter the first intermediate oil passing hole 130a through the check valve 320; then, flows into the first working oil passing hole 140a through the first intermediate chamber 100 d; eventually, the first working chamber 100b is filled with oil, and the recovery accumulator 700 releases oil during the compression stroke. When the compression stroke speed is fast, a portion of the high pressure oil in the second working chamber 100c may push the flow valve portion 222 of the piston member 220 open into the first working chamber 100 b. When the compression stroke speed is fast, part of the high-pressure oil in the second working chamber 100c may also push the compression valve portion 113 open into the compression chamber 100 e. The flow valve portion 222 and the compression valve portion 113 function as overload protection. The compression damping force may be controllably adjusted by the second damping valve assembly 500.

During the restoring stroke, i.e., extension, of piston rod assembly 200, piston member 220 moves in a direction away from base valve 110 such that the volume of first working chamber 100b becomes smaller and the volume of second working chamber 100c becomes larger. In this process, the oil in the first working chamber 100b flows into the first intermediate chamber 100d through the first working oil passing hole 140 a; then, enters the first damping valve assembly 300 through the first intermediate oil passing hole 130 a; the oil is throttled by the throttle valve 310 and flows into the recovery chamber 100a. During a recovery stroke, the recovery accumulator 700 absorbs oil. In this process, the oil in the compression chamber 100e passes through the compensating hole 111c of the base valve 110 and pushes open the compensating valve portion 112, and finally the oil fills the second working chamber 100 c. During a recovery stroke, the compression accumulator 710 releases oil. The restoring damping force may be controllably adjusted by the first damping valve assembly 300.

The process of achieving a quick lift, i.e. a quick extension of the piston rod assembly 200, of the shock absorber according to the present utility model is: the hydraulic pump assembly 600 pumps high-pressure oil into the second oil pipe 730 so that the high-pressure oil enters the compression chamber 100 e; then, the high-pressure oil pushes open the compensation valve portion 112 of the base valve 110 in the compression chamber 100e, so that the high-pressure oil flows from the compensation hole 111c of the base valve 110 into the second working chamber 100c, so that the second working chamber 100c is filled with the high-pressure oil. At this time, the oil pressure in the first working chamber 100b is relatively low, and the pressure difference may generate a thrust force toward the first working chamber 100b to the piston member 220, so that the rod member 210 is rapidly lifted, i.e., rapidly extended. During the rapid lifting of the rod member 210, the oil in the first working chamber 100b flows into the first intermediate chamber 100d through the first working oil passing hole 140 a; then, the oil enters the first damping valve assembly 300 through the first intermediate oil passing hole 130 a; the oil is throttled by the throttle valve 310 and then flows into the recovery chamber 100a. In this process, the throttle capability of the first damping valve assembly 300 may be set to be the weakest in order to generate a force that lifts the lever member 210. In this process, the hydraulic pump assembly 600 draws oil in the recovery chamber 100a through the first oil pipe 720 and pumps the oil into the second oil pipe 730. During a lifting stroke, oil within the first working chamber 100b is circulated and pumped into the second working chamber 100c by the hydraulic pump assembly 600.

The process of achieving a rapid descent, i.e., a rapid retraction of the piston rod assembly 200, of the shock absorber according to the present utility model is: the hydraulic pump assembly 600 pumps high pressure oil into the first oil pipe 720 such that the high pressure oil enters the recovery chamber 100 a; the oil again enters the first middle oil passing hole 130a through the check valve 320; then, flows into the first working oil passing hole 140a through the first intermediate chamber 100 d; eventually, the first working chamber 100b is filled with high-pressure oil. At this time, the oil pressure in the second working chamber 100c is relatively low, and the pressure difference may generate a thrust force toward the second working chamber 100c to the piston member 220, so that the rod member 210 is rapidly lowered, i.e., rapidly retracted. In this process, the oil in the second working chamber 100c flows into the second intermediate chamber 100f through the second working oil passing hole 140 b; and then flows into the transition joint 530 through the second intermediate oil passing hole 131 a; and then into a second damper valve assembly 500; the oil is throttled by the second damping valve assembly 500 and then flows from the oil outlet hole 500b to the compression chamber 100e. In this process, the throttling capability of the second damping valve assembly 500 may be set to be weakest in order to generate a force that lowers the lever member 210. In this process, the hydraulic pump assembly 600 draws out the oil in the compression chamber 100e through the second oil pipe 730 and pumps the oil into the first oil pipe 720. During the descent stroke, oil within the second working chamber 100c is circulated and pumped into the first working chamber 100b by the hydraulic pump assembly 600.

According to the shock absorber of the present utility model, two solenoid valves may be provided as the first damping valve assembly 300 and the second damping valve assembly 500, respectively. The central axis of the spacer ring 181 is parallel to the central axis of the damper. Two solenoid valves are distributed on both sides of the spacer ring 181 in the direction of the central axis of the shock absorber. The restoring chamber 100a and the compressing chamber 100e are distributed on both sides of the spacer ring 181 in the direction of the center axis of the shock absorber. A shock absorber according to the present utility model may have two accumulators and one hydraulic pump assembly 600. At least one accumulator is arranged outside the shock absorber. According to the shock absorber, the restoring damping force and the compression damping force are independently and separately adjustable, the shock absorber has the functions of quick lifting and quick descending, the radial size of the shock absorber is small, and the shock absorber is convenient to install and arrange on a chassis suspension of a whole vehicle.

Unless defined otherwise, technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model pertains. The terminology used herein is for the purpose of describing particular implementations only and is not intended to be limiting of the utility model. Terms such as "disposed" or the like as used herein may refer to either one element being directly attached to another element or one element being attached to another element through an intermediate member. Features described herein in one embodiment may be applied to another embodiment alone or in combination with other features unless the features are not applicable or otherwise indicated in the other embodiment.

The present utility model has been described in terms of the above embodiments, but it should be understood that the above embodiments are for purposes of illustration and description only and are not intended to limit the utility model to the embodiments described. Those skilled in the art will appreciate that many variations and modifications are possible in light of the teachings of the utility model, which variations and modifications are within the scope of the utility model as claimed.

Claims

1. A spacer assembly for a damping adjustable shock absorber, the spacer assembly comprising a spacer ring for sleeving on the outside of a working cylinder of the damping adjustable shock absorber, the spacer ring comprising:

2. The separator assembly of claim 1, wherein,

the separating ring comprises at least two outer ring parts, and the at least two outer ring parts are arranged at intervals along the axial direction of the separating ring.

3. The separator assembly of claim 2, wherein,

a first seal groove is defined between the outer peripheral surfaces of two adjacent outer ring parts and the inner ring part,

the partition assembly further includes:

4. The separator assembly of claim 1, wherein,

both ends of the inner ring part along the axial direction of the inner ring part protrude outside the outer ring part along the axial direction.

5. The separator assembly of claim 3, wherein,

the second sealing groove is located between two adjacent outer ring parts along the axial direction of the separation ring.

6. The separator assembly of claim 3 or 5, wherein,

the spacer ring comprises two outer ring portions,

the inner ring part comprises an inner ring middle part and two inner ring end parts, the inner ring middle part is positioned between the two inner ring end parts along the axial direction of the separation ring, the end parts of the inner ring middle part are connected to the outer ring part, a spigot is formed between the inner ring end parts and the adjacent outer ring part, and the outer diameter of the inner ring end parts is smaller than that of the inner ring middle part.

7. A damping-adjustable shock absorber, characterized in that the damping-adjustable shock absorber comprises:

the partition assembly according to any one of claims 1 to 6, being located between the first oil passing hole and the second oil passing hole in the axial direction, the partition assembly being fitted over an outer side of the working cylinder and being connected to the housing in a radial direction to partition a space between the working cylinder and the housing into a first chamber and a second chamber, the first chamber being in fluid communication to an outside of the housing via the first oil passing hole, and the second chamber being in fluid communication to an outside of the housing via the second oil passing hole.

8. The damping-adjustable shock absorber according to claim 7, wherein,

a working cavity is formed in the working cylinder;

the damping-adjustable shock absorber further includes:

the base valve is configured such that:

9. The damping-adjustable shock absorber according to claim 8, wherein,

the damping-adjustable shock absorber further includes:

10. The damping-adjustable shock absorber according to claim 9, wherein,

the damping-adjustable shock absorber further includes:

11. The damping-adjustable shock absorber according to claim 10, wherein,

the damping-adjustable shock absorber further comprises an oil pipe connecting block, the oil pipe connecting block is connected to the outside of the shell, a first oil inlet and outlet hole and a second oil inlet and outlet hole are formed in the oil pipe connecting block, the first oil inlet and outlet hole is communicated to the first oil passing hole, the second oil inlet and outlet hole is communicated to the second oil passing hole, the hydraulic pump assembly is connected to the first oil inlet and outlet hole through the recovery accumulator, and the hydraulic pump assembly is connected to the second oil inlet and outlet hole through the compression accumulator.

12. The damping-adjustable shock absorber according to claim 10, wherein,

the base valve includes:

13. The damping-adjustable shock absorber according to claim 8, wherein,

the piston member includes:

a piston body portion having a second through hole; and

14. The damping tunable shock absorber according to any one of claims 8 to 13, wherein,

the damping-adjustable shock absorber further includes:

15. The damping tunable shock absorber according to claim 14, wherein,

one of the two end parts of the inner ring part along the self axial direction is clamped between the first middle cylinder and the working cylinder, the other one of the two end parts of the inner ring part along the self axial direction is clamped between the second middle cylinder and the working cylinder, and the outer ring part is connected between the first middle cylinder and the second middle cylinder.