Shock absorber and vehicle

Abstract

The utility model discloses a shock absorber and a vehicle. The shock absorber comprises a pipe assembly, a piston, a piston rod, a protective shell, a cylindrical dust cover, a guide sealing assembly and an axial limiting piece. The tube assembly includes an inner tube and an outer tube, and has a first end and a second end. The piston is located in the inner pipe and connected with the piston rod. The protective shell comprises a protective base and a cylindrical shell, the end of the piston rod is sleeved with the protective base, the piston rod is surrounded by the cylindrical shell, and the cylindrical shell is provided with an open end. One end of the cylindrical dust cover is connected with the outer pipe, and the other end is connected with the open end. The guide sealing assembly is arranged at the first end of the pipe assembly and is in sliding sealing connection with the piston rod, and the guide sealing assembly is in sealing connection with the outer pipe and the inner pipe. The axial limiting piece is arranged on the side, away from the piston, of the guide sealing assembly, and the axial limiting piece abuts against the guide sealing assembly in the axial direction of the pipe assembly. The shock absorber is simpler in structure and more stable in performance.

Description

Technical Field

[0001] The embodiment of the utility model relates to a shock absorber and a vehicle. Background Art

[0002] The elastic element in the suspension system will rebound and generate vibration after absorbing shock. In order to improve the vibration caused by rebound, a shock absorber connected in parallel with the elastic element can be installed in the automobile suspension system to attenuate the vibration. The working principle of the shock absorber is that when the frame (or body) and the axle vibrate and there is relative movement, the piston rod in the shock absorber moves up and down, and the oil in the oil storage cylinder of the shock absorber repeatedly flows from one cavity to another through different valves. At this time, the friction between the hole wall and the oil and the internal friction between the oil molecules form a damping force on the vibration, so that the vibration energy of the car is converted into oil heat energy, which is then absorbed by the shock absorber and dissipated into the atmosphere. Utility Model Content

[0003] The embodiment of the utility model provides a shock absorber and a vehicle.

[0004] At least one embodiment of the utility model provides a shock absorber, comprising: a tube assembly, comprising an inner tube and an outer tube sleeved outside the inner tube, and having a first end and a second end opposite to each other along the axial direction of the tube assembly; a piston, located in the inner tube; a piston rod, connected to the piston, and extending to the first end and to the outside of the tube assembly along the axial direction of the tube assembly; a protective shell, comprising a protective base and a cylindrical shell arranged on the protective base, the protective base is sleeved on the end of the piston rod away from the piston, the cylindrical shell surrounds the piston rod, and within the movement stroke of the piston rod, along the radial direction of the tube assembly, the cylindrical shell overlaps with the tube assembly. The inner diameter of the part is larger than the outer diameter of the tube assembly, the cylindrical shell has an open end away from the protective base, a cylindrical dust cover, one end of the cylindrical dust cover is connected to the outer tube, and the other end of the cylindrical dust cover is connected to the open end, a guide sealing assembly is arranged at the first end of the tube assembly, the guide sealing assembly is sleeved on the piston rod and is slidingly sealed with the piston rod, along the radial direction of the tube assembly, the guide sealing assembly is respectively sealed and connected to the outer tube and the inner tube; and an axial limiter is arranged on the side of the guide sealing assembly away from the piston, and along the axial direction of the tube assembly, the axial limiter abuts against the guide sealing assembly.

[0005] For example, in the shock absorber provided in one embodiment of the utility model, the axial limit member includes a threaded tube column, and along the axial direction of the tube assembly, the threaded tube column abuts against the guide sealing assembly, and the outer wall of the threaded tube column is provided with an external thread. The tube assembly also includes a mounting tube, and the mounting tube is arranged at the end of the outer tube close to the first end, and the inner wall of the mounting tube is provided with an internal thread. The threaded tube column is sleeved on the piston rod and is threadedly connected to the mounting tube.

[0006] For example, in the shock absorber provided in one embodiment of the utility model, the threaded pipe column includes an abutting surface, the guide sealing assembly includes an abutted surface, the abutting surface contacts the abutted surface, and along the axial direction of the pipe assembly, the orthographic projection of the abutting surface on the plane where the abutted surface is located all falls within the abutted surface.

[0007] For example, in the shock absorber provided in an embodiment of the present invention, the abutting surface is substantially flush with the end surface of the outer tube close to the first end.

[0008] For example, in a shock absorber provided in an embodiment of the present utility model, the threaded tube column includes a plurality of auxiliary mounting holes to enable the threaded tube column to be threadedly connected to the mounting tube.

[0009] For example, in the shock absorber provided in one embodiment of the present invention, the outer diameter of the mounting tube is larger than the outer diameter of the outer tube, and the inner diameter of the mounting tube is not smaller than the inner diameter of the outer tube.

[0010] For example, in the shock absorber provided in an embodiment of the present invention, the mounting tube and the outer tube are integrally formed.

[0011] For example, in the shock absorber provided in an embodiment of the present invention, the axial limit member includes a baffle, and along the axial direction of the tube assembly, the baffle abuts against the guide seal assembly.

[0012] For example, in the shock absorber provided in one embodiment of the present utility model, the baffle and the outer tube are integrally formed.

[0013] For example, in the shock absorber provided in one embodiment of the utility model, the guide seal assembly includes a guide and an oil seal, the oil seal is arranged on the side of the guide away from the piston, and along the axial direction of the tube assembly, the axial limiter abuts against the oil seal.

[0014] For example, in the shock absorber provided in one embodiment of the utility model, the piston divides the cavity of the inner tube into a first working cavity and a second working cavity, the piston rod extends to the outside of the tube assembly via the first working cavity, the shock absorber also includes a mounting seat, the mounting seat is arranged at the end of the inner tube close to the second end, the mounting seat is sealingly connected to the inner tube along the radial direction of the tube assembly, the mounting seat has a connecting channel, and the first working cavity is connected to the outside of the tube assembly through the connecting channel.

[0015] For example, in the shock absorber provided in one embodiment of the utility model, the cylindrical shell includes a first shell portion and a second shell portion, the first shell portion is closer to the protective base than the second shell portion, within the movement stroke of the piston rod, along the radial direction of the tube assembly, the second shell portion overlaps with the tube assembly, the first shell portion does not overlap with the tube assembly, and the radial dimension of the first shell portion is smaller than the radial dimension of the second shell portion.

[0016] At least one embodiment of the utility model provides a vehicle, comprising any of the above-mentioned shock absorbers.

[0017] The axial limiter of the shock absorber provided in the embodiment of the utility model ensures the sealing of the guide seal assembly with the piston rod and the tube assembly by limiting the guide seal assembly in the axial direction of the tube assembly, thereby ensuring the shock absorbing performance of the shock absorber. Compared with limiting structures in other directions or in other ways, the guide seal assembly can be limited more stably, and the structural design of the guide seal assembly, the axial limiter, the tube assembly, etc. is simpler. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings in the following description only relate to some embodiments of the present utility model, rather than limiting the present utility model.

[0019] Figure 1 A cross-sectional schematic diagram of a shock absorber provided by an embodiment of the utility model;

[0020] Figure 2 for Figure 1 A local enlarged schematic diagram at position A;

[0021] Figure 3 A cross-sectional schematic diagram of another shock absorber provided by an embodiment of the utility model; and

[0022] Figure 4 for Figure 3 A partial enlarged schematic diagram at position B. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution of the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings of the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the described embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] Unless otherwise defined, the technical or scientific terms used in the present invention shall have the usual meanings understood by persons with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar terms used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "include" or "comprise" and the like mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" and the like are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0025] Unless otherwise defined, the features such as "parallel", "perpendicular" and "same" used in the embodiments of the present invention include the situations of "parallel", "perpendicular", "same" in a strict sense, as well as the situations of "approximately parallel", "approximately perpendicular", "approximately the same" and the like that contain a certain error. For example, the above-mentioned "approximately" may indicate that the difference of the compared objects is within 10% or 5% of the average value of the compared objects. When the number of a component or element is not specifically indicated in the following of the embodiments of the present invention, it means that the component or element may be one or more, or may be understood as at least one. "At least one" means one or more, and "more than one" means at least two.

[0026] The utility model embodiment provides a shock absorber and a vehicle. The shock absorber includes a tube assembly, a piston, a piston rod, a protective shell, a cylindrical dust cover, a guide seal assembly and an axial limiter. The tube assembly includes an inner tube and an outer tube sleeved outside the inner tube, and has a first end and a second end opposite to each other along the axial direction of the tube assembly. The piston is located in the inner tube, and the piston rod is connected to the piston and extends to the first end and to the outside of the tube assembly along the axial direction of the tube assembly. The protective shell includes a protective base and a cylindrical shell arranged on the protective base, the protective base is sleeved on the end of the piston rod away from the piston, the cylindrical shell surrounds the piston rod, and within the movement stroke of the piston rod, along the radial direction of the tube assembly, the inner diameter of the part where the cylindrical shell overlaps with the tube assembly is greater than the outer diameter of the tube assembly, and the cylindrical shell has an open end away from the protective base. One end of the cylindrical dust cover is connected to the outer tube, and the other end of the cylindrical dust cover is connected to the open end. The guide seal assembly is arranged at the first end of the tube assembly, the guide seal assembly is sleeved on the piston rod and is connected to the piston rod in a sliding and sealing manner, and along the radial direction of the tube assembly, the guide seal assembly is respectively connected to the outer tube and the inner tube in a sealing manner. An axial stopper is arranged on a side of the guide seal assembly away from the piston, and along the axial direction of the tube assembly, the axial stopper abuts against the guide seal assembly.

[0027] In the shock absorber provided in the embodiment of the utility model, the tube assembly includes an inner tube and an outer tube, the piston is located in the inner tube, the piston can divide the volume cavity of the inner tube into two working cavities, one of the two working cavities is connected to the working cavity formed between the inner tube and the outer tube, and the shock absorbing effect of the shock absorber can be achieved by controlling the circulation of the oil in the working cavity. For example, the working cavity can be connected to a control valve or a hydraulic oil circuit to achieve different shock absorbing performances. The piston can be protected by a protective shell and a cylindrical dust cover. The guide seal assembly is connected to the piston rod in a sliding seal, and is sealed to the tube assembly, thereby ensuring the axial movement of the piston rod and the sealing of the tube assembly at the first end. By setting an axial limiter on the side of the guide seal assembly away from the piston, and the axial limiter abuts against the guide seal assembly, the axial position of the guide seal assembly is limited, thereby ensuring the sealing of the guide seal assembly with the piston rod and the tube assembly and the shock absorbing performance of the shock absorber.

[0028] The shock absorber and the vehicle provided by the embodiment of the utility model are described in detail below with reference to the accompanying drawings.

[0029] The embodiment of the utility model provides a shock absorber. Figure 1 A cross-sectional schematic diagram of a shock absorber provided by an embodiment of the utility model; Figure 2 for Figure 1 A partial enlarged schematic diagram at position A. Figure 1 and Figure 2As shown, the shock absorber 100 includes a tube assembly 110, a piston 120, a piston rod 130, a protective shell 140, a cylindrical dust cover 150, a guide seal assembly 160 and an axial stopper 170. The tube assembly 110 includes an inner tube 111 and an outer tube 112 sleeved outside the inner tube 111, and has a first end E1 and a second end E2 opposite to each other along the axial direction X of the tube assembly 110. The piston 120 is located in the inner tube 111, and the piston rod 130 is connected to the piston 120, and extends to the first end E1 and extends to the outside of the tube assembly 110 along the axial direction X of the tube assembly 110. The protective shell 140 includes a protective base 141 and a cylindrical shell 142 disposed on the protective base 141. The protective base 141 is sleeved on the end E3 of the piston rod 130 away from the piston 120. The cylindrical shell 142 surrounds the piston rod 130. Within the movement stroke of the piston rod 130, along the radial direction X of the tube assembly 110, the inner diameter of the portion where the cylindrical shell 142 overlaps with the tube assembly 110 is greater than the outer diameter of the tube assembly 110. The cylindrical shell 142 has an open end 142a away from the protective base 141. One end of the cylindrical dust cover 150 is connected to the outer tube 112, and the other end of the cylindrical dust cover 150 is connected to the open end 142a. The guide seal assembly 160 is disposed at the first end E1 of the tube assembly 110, and is sleeved on the piston rod 130 and is slidably sealed with the piston rod 130. Along the radial direction of the tube assembly 110, the guide seal assembly 160 is respectively sealed with the outer tube 112 and the inner tube 111. The axial stopper 170 is disposed on the side of the guide seal assembly 160 away from the piston 120, and along the axial direction X of the tube assembly 110, the axial stopper 170 abuts against the guide seal assembly 160.

[0030] In the shock absorber 100 provided in the embodiment of the utility model, as Figure 1 As shown, the piston 120 can divide the volume of the inner tube 111 into two working chambers, one of which is connected to the working chamber formed between the inner tube 111 and the outer tube 112. By controlling the flow of oil in the working chamber, the shock absorber 100 can achieve a shock absorbing effect. For example, the working chamber can be connected to a control valve or a hydraulic oil circuit to achieve different shock absorbing performances.

[0031] like Figure 1As shown, the protective base 141 is arranged at the end E3 of the piston rod 130, and the protective base 141 and the cylindrical shell 142 move with the axial movement of the piston rod 130. The movement stroke of the piston rod 130 includes moving toward the second end E2 of the tube assembly 110 and returning. For example, when the piston rod 130 moves toward the second end E2 of the tube assembly 110, along the radial direction X of the tube assembly 110, the cylindrical shell 142 overlaps with the tube assembly 110, and the inner diameter of the overlapping portion of the cylindrical shell 142 and the tube assembly 110 is greater than the outer diameter of the tube assembly 110. The piston 120 can be protected by the protective shell 140 and the cylindrical dust cover 150. In the present utility model, the overlap of multiple components in a certain direction means that the orthographic projections of the multiple components on a reference plane perpendicular to the direction overlap.

[0032] like Figure 1 and Figure 2 As shown, the guide seal assembly 160 is slidably sealed and connected to the piston rod 130, and is sealed and connected to the tube assembly 110, which ensures the sealing of the tube assembly 110 at the first end E1 and the shock absorbing performance of the shock absorber. By setting an axial stopper 170 on the side of the guide seal assembly 160 away from the piston 120, and the axial stopper 170 abuts against the guide seal assembly 160, the axial position of the guide seal assembly 160 is limited, which ensures the sealing of the guide seal assembly 160 with the piston rod 130 and the tube assembly 110, and the shock absorbing performance of the shock absorber 100. Compared with the limiting structures in other directions or other ways, the axial stopper used to limit the guide seal assembly in the axial direction can limit the guide seal assembly more stably, and makes the structural design of the guide seal assembly, the axial stopper, the tube assembly, etc. simpler.

[0033] In some examples, such as Figure 1 and Figure 2 As shown, the axial stopper 170 includes a threaded tube column 171, and the threaded tube column 171 abuts against the guide seal assembly 160 along the axial direction X of the tube assembly 110. The outer wall of the threaded tube column 171 is provided with an external thread, and the tube assembly 110 further includes a mounting tube 113, which is provided at the end of the outer tube 112 close to the first end E1, and the inner wall of the mounting tube 113 is provided with an internal thread, and the threaded tube column 171 is sleeved on the piston rod 130 and is threadedly connected with the mounting tube 113.

[0034] In this example, by screwing the threaded tube column 171 and the mounting tube 113, the threaded tube column 171 can be abutted against the guide seal assembly 160, and the guide seal assembly 160 can be limited in the axial direction X. By screwing the threaded tube column 171 and the mounting tube 113, the abutment force between the threaded tube column 171 and the guide seal assembly 160 can be adjusted more conveniently and flexibly, and the guide seal assembly 160 can be limited better and more stably. For example, tightening the threaded tube column 171 in a direction close to the guide seal assembly 160 can increase the abutment force between the threaded tube column 171 and the guide seal assembly 160. For example, loosening the threaded tube column 171 in a direction away from the guide seal assembly 160 can reduce the abutment force between the threaded tube column 171 and the guide seal assembly 160.

[0035] In the prior art, the outer wall of the outer tube is provided with an external thread, and the stopper with an internal thread is screwed to the outer tube with an external thread. With such a design, the stopper screwed to the outside of the outer tube increases the radial dimension of the shock absorber 100 in the pipe assembly 110. In this example, the threaded pipe column 171 with an external thread is screwed to the mounting pipe 113 with an internal thread, which can better reduce the radial dimension of the shock absorber 100 in the pipe assembly 110 and reduce the space occupied by the shock absorber 100.

[0036] In some examples, such as Figure 2 As shown, the threaded pipe column 171 includes an abutting surface S1, and the guide seal assembly 160 includes an abutted surface S2, and the abutting surface S1 contacts the abutted surface S2. Along the axial direction X of the pipe assembly 110, the orthographic projection of the abutting surface S1 on the plane where the abutted surface S2 is located all falls within the abutted surface S2. Therefore, the abutting surface S1 is completely located within the abutted surface S2, for example, the outer tube 112 located on the outer periphery of the guide seal assembly 160 can be prevented from affecting the abutment of the threaded pipe column 171 against the guide seal assembly 160. For example, the area of ​​the abutting surface is smaller than the area of ​​the abutted surface.

[0037] In some examples, such as Figure 2 As shown, the abutting surface S1 is substantially flush with the end surface 112a of the outer tube 112 close to the first end E1. That is, the joint surface of the outer tube 112 and the mounting tube 113 is flush with the abutting surface S1. Thus, the structural design of the threaded tube column 171, the mounting tube 113 and the guide seal assembly 160 is facilitated.

[0038] For example, Figure 2 As shown, the end surface of the threaded tube column 171 away from the guide seal assembly 160 is flush with the end surface of the mounting tube 113 away from the guide seal assembly 160 .

[0039] For example, Figure 2As shown, along the axial direction X of the pipe assembly 110, the size of the threaded pipe column 171 is substantially equal to the size of the mounting pipe 113. Thus, the structural design of the threaded pipe column 171 and the mounting pipe 113 is facilitated.

[0040] In some examples, such as Figure 2 As shown, the threaded column 171 includes a plurality of auxiliary mounting holes 171 a to enable the threaded column 171 to be threadedly connected to the mounting pipe 113 .

[0041] For example, Figure 2 As shown, the auxiliary mounting hole 171a can be a through hole that penetrates the threaded column 171. For example, the auxiliary mounting hole can also be a blind hole that does not penetrate the threaded column. The embodiment of the utility model does not limit the number and shape of the auxiliary mounting holes. For example, the multiple mounting holes can be centrally symmetrical about the central axis of the threaded column. For example, the shape of the auxiliary mounting hole can be cylindrical, prismatic, etc.

[0042] In some examples, such as Figure 2 As shown, the outer diameter of the mounting tube 113 is greater than the outer diameter of the outer tube 112. For example, the mounting tube 113 and the outer tube 112 can be welded together by a welding process. By making the outer diameter of the mounting tube 113 greater than the outer diameter of the outer tube 112, the welding firmness of the joint between the mounting tube 113 and the outer tube 112 can be improved. The embodiment of the utility model does not limit the connection method between the mounting tube and the outer tube. For example, it can also be a clamping, plugging, bonding, screwing, etc. For example, the fixing of the mounting tube and the outer tube can also be achieved through a connecting structure.

[0043] In some examples, the mounting tube and the outer tube are integrally formed. Thus, the structure of the mounting tube and the outer tube can be simplified, and the structural durability between the baffle and the outer tube can be improved. In addition, since the mounting tube and the outer tube are integrally formed, when the threaded tube column and the mounting tube are threadedly connected, the outer tube will not affect the abutment between the threaded tube column and the guide seal assembly, thereby avoiding the limit failure of the guide seal assembly in the axial direction.

[0044] In some examples, such as Figure 2 As shown, the inner diameter of the mounting tube 113 is not less than the inner diameter of the outer tube 112 , so that the contact area between the threaded tube column 171 and the guide seal assembly 160 can be increased as much as possible, thereby better limiting the guide seal assembly 160 .

[0045] In some examples, such as Figure 2 As shown, the guide seal assembly 160 includes a guide 161 and an oil seal 162, and the oil seal 162 is arranged on the side of the guide 161 away from the piston 120. Along the axial direction X of the pipe assembly 110, the threaded pipe column 171 abuts against the oil seal 162. Figure 2As shown, the oil seal 162 includes a frame 162a and a sealing lip 162b, and the threaded column 171 abuts against the frame 162a of the oil seal 162. For example, by making the threaded column abut against the oil seal, the size of the shock absorber in the axial direction of the pipe assembly can be reduced as much as possible, reducing the space occupied by the shock absorber.

[0046] In some examples, such as Figure 1 As shown, the piston 120 divides the volume of the inner tube 111 into a first working chamber V1 and a second working chamber V2, and the piston rod 130 extends to the outside of the pipe assembly 110 via the first working chamber V1. The shock absorber 100 further includes a mounting seat 180, which is disposed at the end of the inner tube 111 close to the second end E2. The mounting seat 180 is sealed and connected to the inner tube 111 in the radial direction of the pipe assembly 110. The mounting seat 180 has a communication channel 181, and the first working chamber V1 is connected to the outside of the pipe assembly 110 through the communication channel 181. Therefore, through the communication channel 181, the first working chamber V1 can be connected to an external control valve or hydraulic oil circuit, etc., to achieve different shock absorption performances.

[0047] In some examples, such as Figure 1 As shown, the cylindrical shell 142 includes a first shell portion 1420 and a second shell portion 1421, and the first shell portion 1420 is closer to the protective base 141 than the second shell portion 1421. In the movement stroke of the piston rod 130, along the radial direction X of the tube assembly 110, the second shell portion 1421 overlaps with the tube assembly 110, and the first shell portion 1420 does not overlap with the tube assembly 110. For example, the radial dimension of the first shell portion 1420 is smaller than the radial dimension of the second shell portion 1421. For example, the radial dimension of the first shell portion 1420 is smaller than the radial dimension of the tube assembly 110. Thus, the size of the shock absorber 100 in the radial direction of the tube assembly 110 can be reduced, and the space occupied by the shock absorber 100 can be reduced. In addition, the radial dimension of the first shell portion is smaller than the radial dimension of the second shell portion, which can make the radial dimension of the cylindrical shell change, thereby increasing the strength of the cylindrical shell.

[0048] In some examples, such as Figure 1 As shown, the protective base 141 of the protective shell 140 is sleeved on the end E3 of the piston rod 130, the cylindrical shell 142 surrounds the protective base 141 and the piston rod 130, and the protective base 141 and the cylindrical shell 142 are fixed together with the piston rod 130 through the positioning column 143. Figure 1 As shown, the protective base 141 of the protective shell 140 can also be welded together.

[0049] Figure 3 A cross-sectional schematic diagram of another shock absorber provided by an embodiment of the utility model; Figure 4 for Figure 3 A partial enlarged schematic diagram at position B. Figure 3 and Figure 4 As shown, the axial stopper 170 of the shock absorber 100 includes a baffle 172, and the baffle 172 abuts against the guide seal assembly 160 along the axial direction X of the tube assembly 110. The baffle 172 has a simple structure, which facilitates the structural design simplification, lightness and low cost of the shock absorber 100.

[0050] In some examples, such as Figure 3 and Figure 4 As shown, the baffle 172 is integrally formed with the outer tube 112. Thus, the structure of the baffle 172 and the outer tube 112 can be simplified, and the structural durability between the baffle 172 and the outer tube 112 can be improved. In addition, the processing and manufacturing process of the baffle 172 can also be simplified. For example, the baffle can be directly formed at the end of the outer tube by using a riveting process.

[0051] In some examples, the baffle is annular and sleeved on the outside of the piston rod.

[0052] In some examples, such as Figure 3 and Figure 4 As shown, the guide seal assembly 160 includes a guide 161, an oil seal 162 and a support portion 163. The oil seal 162 is arranged on a side of the guide 161 away from the piston 120, and the support portion 163 is arranged on a side of the oil seal 162 away from the piston 120. Along the axial direction X of the pipe assembly 110, the baffle 172 abuts against the support portion 163. For example, the support portion 163 can prevent the axial stopper 170 from affecting the sealing lip 162b. The embodiment of the utility model does not limit the structure of the support portion.

[0053] In some examples, such as Figure 3 As shown, the piston 120 divides the volume of the inner tube 111 into a first working chamber V1 and a second working chamber V2, and the piston rod 130 extends to the outside of the pipe assembly 110 via the first working chamber V1. The shock absorber 100 further includes a mounting seat 180, which is disposed at the end of the inner tube 111 close to the second end E2. The mounting seat 180 is sealed and connected to the inner tube 111 in the radial direction of the pipe assembly 110. The mounting seat 180 has a communication channel 181, and the first working chamber V1 is connected to the outside of the pipe assembly 110 through the communication channel 181. Therefore, through the communication channel 181, the first working chamber V1 can be connected to an external control valve or hydraulic oil circuit, etc., to achieve different shock absorption performances.

[0054] In some examples, such as Figure 3 As shown, within the movement stroke of the piston rod 130, along the radial direction X of the tube assembly 110, the cylindrical housing 142 overlaps with the tube assembly 110. Figure 3As shown, when the piston rod 130 moves toward the second end E2 of the pipe assembly 110 until it can no longer move, the cylindrical housing 142 overlaps the pipe assembly 110 along the radial direction X of the pipe assembly 110. At this time, the inner diameter of the cylindrical housing 142 is greater than the outer diameter of the pipe assembly 110. For example, the radial dimensions of the cylindrical housing 142 are equal.

[0055] The embodiment of the utility model further provides a vehicle. The vehicle includes the shock absorber of any of the above embodiments. For example, the shock absorber can be used in the suspension system of the vehicle. The shock absorber can be connected to other components in the vehicle in various conventional connection methods, which will not be described in detail here. Since the vehicle according to the embodiment of the utility model adopts the above shock absorber, the vehicle can also obtain various technical effects brought by the above shock absorber, which will not be described in detail here.

[0056] There are a few points to note:

[0057] (1) In the drawings of the embodiments of the present invention, only the structures related to the embodiments of the present invention are involved, and other structures can refer to the general design.

[0058] (2) In the absence of conflict, the features of the same embodiment and different embodiments of the present invention may be combined with each other.

[0059] The above are only specific implementations of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A shock absorber, characterized in that: include: A pipe assembly, comprising an inner pipe and an outer pipe sleeved outside the inner pipe, and having a first end and a second end opposite to each other along the axial direction of the pipe assembly; a piston, located in the inner tube; a piston rod connected to the piston and extending along the axial direction of the tube assembly to the first end and to the outside of the tube assembly; The protective shell comprises a protective base and a cylindrical shell arranged on the protective base, wherein the protective base is sleeved on the end of the piston rod away from the piston, the cylindrical shell surrounds the piston rod, and within the movement stroke of the piston rod, along the radial direction of the tube assembly, the inner diameter of the portion where the cylindrical shell overlaps with the tube assembly is greater than the outer diameter of the tube assembly, and the cylindrical shell has an open end away from the protective base. A cylindrical dust cover, one end of which is connected to the outer tube, and the other end of which is connected to the open end. a guide seal assembly, arranged at the first end of the tube assembly, the guide seal assembly being sleeved on the piston rod and slidably and sealingly connected to the piston rod, and the guide seal assembly being respectively and sealingly connected to the outer tube and the inner tube in the radial direction of the tube assembly; and An axial limiter is arranged on a side of the guide seal assembly away from the piston, and along the axial direction of the tube assembly, the axial limiter abuts against the guide seal assembly.

2. The shock absorber according to claim 1, characterized in that: The axial stopper comprises a threaded tube column, and along the axial direction of the tube assembly, the threaded tube column abuts against the guide seal assembly, The outer wall of the threaded pipe column is provided with external threads, and the pipe assembly also includes a mounting tube, which is arranged at the end of the outer tube close to the first end, and the inner wall of the mounting tube is provided with internal threads. The threaded pipe column is sleeved on the piston rod and threadedly connected to the mounting tube.

3. The shock absorber according to claim 2, characterized in that: The threaded pipe column includes an abutting surface, and the guide seal assembly includes an abutted surface, wherein the abutting surface contacts the abutted surface. Along the axial direction of the pipe assembly, the orthographic projection of the abutting surface on the plane where the abutted surface is located all falls within the abutted surface.

4. The shock absorber according to claim 3, characterized in that: The abutting surface is flush with an end surface of the outer tube close to the first end.

5. The shock absorber according to any one of claims 2 to 4, characterized in that: The threaded pipe column includes a plurality of auxiliary mounting holes to enable the threaded pipe column to be threadedly connected to the mounting pipe.

6. The shock absorber according to any one of claims 2 to 4, characterized in that: The outer diameter of the installation tube is larger than the outer diameter of the outer tube, and the inner diameter of the installation tube is not smaller than the inner diameter of the outer tube.

7. The shock absorber according to any one of claims 2 to 4, characterized in that: The mounting tube and the outer tube are integrally formed.

8. The shock absorber according to claim 1, characterized in that The axial limiting member includes a baffle plate, and along the axial direction of the tube assembly, the baffle plate abuts against the guide seal assembly.

9. The shock absorber according to claim 8, characterized in that The baffle and the outer tube are integrally formed.

10. The shock absorber according to any one of claims 1 to 4, characterized in that: The guide seal assembly includes a guide and an oil seal, wherein the oil seal is arranged on a side of the guide away from the piston. Along the axial direction of the pipe assembly, the axial limiting member abuts against the oil seal.

11. The shock absorber according to any one of claims 1 to 4, characterized in that: The piston divides the cavity of the inner tube into a first working cavity and a second working cavity, and the piston rod extends to the outside of the tube assembly through the first working cavity. The shock absorber also includes a mounting seat, which is arranged at the end of the inner tube close to the second end. Along the radial direction of the tube assembly, the mounting seat is sealed and connected to the inner tube. The mounting seat has a connecting channel, and the first working chamber is connected to the outside of the tube assembly through the connecting channel.

12. The shock absorber according to any one of claims 1 to 4, characterized in that: The cylindrical shell includes a first shell portion and a second shell portion, the first shell portion is closer to the protective base than the second shell portion, within the movement stroke of the piston rod, along the radial direction of the tube assembly, the second shell portion overlaps with the tube assembly, the first shell portion does not overlap with the tube assembly, and the radial dimension of the first shell portion is smaller than the radial dimension of the second shell portion.

13. A vehicle, characterized in that: Comprising a shock absorber according to any one of claims 1-12.

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