Shock absorber and vehicle

Abstract

The utility model discloses a shock absorber and a vehicle. The shock absorber comprises a tube assembly, a piston, a piston rod, a valve seat, a first control valve and a second control valve. The tube assembly includes an inner tube and an outer tube, and has a first end and a second end. The cavity of the inner pipe is divided into a first working cavity and a second working cavity by the piston, the cavity between the inner pipe and the outer pipe is a third working cavity, and the third working cavity is communicated with the second working cavity. The valve seat is arranged at the first end, the first control valve is arranged on the valve seat, and the second control valve is arranged on the valve seat and communicates with the third working cavity. The shock absorber further comprises at least one energy accumulator, the at least one energy accumulator is located outside the outer side wall of the outer pipe, and the outer pipe is located outside the space surrounded by the outer peripheral wall of the at least one energy accumulator. The first working cavity communicates with at least one energy accumulator through a first control valve, and the third working cavity communicates with at least one energy accumulator through a second control valve. The shock absorber is simpler in structure and higher in generalization of parts.

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] 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, the tube assembly having a first end and a second end opposite to each other along its axial direction; a piston, located in the inner tube, and dividing the cavity of the inner tube into a first working cavity and a second working cavity, the first working cavity being closer to the first end of the tube assembly than the second working cavity; a piston rod, connected to the piston, and extending to the outside of the tube assembly via the second working cavity, a valve seat, arranged at the first end of the tube assembly; a first control valve, arranged on the valve seat, and The inner tube and the outer tube are connected to each other with a second control valve, and the inner tube and the outer tube are connected to each other with a third working chamber. The inner tube and the outer tube are connected to each other with a second control valve, and the third working chamber is connected to the second working chamber. The shock absorber also includes at least one accumulator, which is located outside the outer wall of the outer tube, and the outer tube is located outside the space surrounded by the outer wall of the at least one accumulator. The first working chamber is connected to the at least one accumulator via the first control valve, and the third working chamber is connected to the at least one accumulator via the second control valve.

[0004] For example, in a shock absorber provided in an embodiment of the present invention, the central axes of the first control valve and the second control valve are substantially perpendicular to the axial direction of the pipe assembly.

[0005] For example, in the shock absorber provided in an embodiment of the present utility model, the central axis of the first control valve and the central axis of the second control valve are in a straight line.

[0006] For example, in the shock absorber provided in an embodiment of the present invention, the at least one accumulator is disposed on the valve seat and is located on a side of the valve seat close to the pipe assembly.

[0007] For example, in the shock absorber provided in an embodiment of the present invention, the shape of the at least one accumulator is substantially cylindrical, and the axial direction of the at least one accumulator is substantially parallel to the axial direction of the tube assembly.

[0008] For example, in the shock absorber provided in an embodiment of the present invention, the shape of the at least one accumulator is substantially cylindrical, and the radial dimension of the at least one accumulator is not greater than the radial dimension of the tube assembly.

[0009] For example, in the shock absorber provided in an embodiment of the present invention, the at least one accumulator is roughly symmetrically arranged about the mid-vertical plane of the center line connecting the first control valve and the second control valve, and the pipe assembly is roughly symmetrically arranged about the mid-vertical plane.

[0010] For example, in the shock absorber provided in one embodiment of the utility model, the valve seat includes a connecting portion and a first cylindrical mounting portion and a second cylindrical mounting portion respectively connected to the connecting portion, the first cylindrical mounting portion includes a first mounting cavity, the first mounting cavity has a first opening away from the side of the connecting portion so that the first control valve can be installed in the first mounting cavity via the first opening, the second cylindrical mounting portion includes a second mounting cavity, the second mounting cavity has a second opening away from the side of the connecting portion so that the second control valve can be installed in the second mounting cavity via the second opening, and the first cylindrical mounting portion and the second cylindrical mounting portion are integrally formed with the connecting portion.

[0011] For example, in the shock absorber provided in an embodiment of the utility model, the first control valve includes a first one-way throttle valve, the first one-way throttle valve includes a first one-way opening channel and a first throttling channel, the two ends of the first throttling channel are respectively connected to the first working chamber and the at least one accumulator, the two ends of the first one-way opening channel are respectively connected to the first working chamber and the at least one accumulator, the first one-way opening channel is configured to open when the fluid flows from the at least one accumulator to the first working chamber, the second control valve includes a second one-way throttle valve, the second one-way throttle valve includes a second one-way opening channel and a second throttling channel, the two ends of the second throttling channel are respectively connected to the third working chamber and the at least one accumulator, the two ends of the second one-way opening channel are respectively connected to the third working chamber and the at least one accumulator, and the second one-way opening channel is configured to open when the fluid flows from the at least one accumulator to the third working chamber.

[0012] For example, the shock absorber provided in one embodiment of the utility model also includes a first hose and a second hose, wherein the first working chamber is connected to the at least one accumulator via the first control valve and the first hose, and the third working chamber is connected to the at least one accumulator via the second control valve and the second hose.

[0013] For example, in the shock absorber provided in an embodiment of the present invention, the valve seat further includes a first oil inlet and outlet port and a second oil inlet and outlet port, the first oil inlet and outlet port is connected to the first working chamber, and the second oil inlet and outlet port is connected to the third working chamber.

[0014] For example, in a shock absorber provided in an embodiment of the present invention, the first oil inlet and outlet ports and the second oil inlet and outlet ports are arranged on the same side of the valve seat, and are located on opposite sides of the valve seat with the at least one accumulator.

[0015] For example, in the shock absorber provided in one embodiment of the utility model, the at least one accumulator is arranged on the valve seat, the valve seat includes a connecting channel, the connecting channel includes three ports, and the three ports are respectively connected to the first control valve, the second control valve and the at least one accumulator.

[0016] For example, in the shock absorber provided in one embodiment of the utility model, the shock absorber includes two accumulators, the two accumulators are a first accumulator and a second accumulator, the first accumulator is connected to the first working chamber via the first control valve, and the second accumulator is connected to the third working chamber via the second control valve.

[0017] For example, in the shock absorber provided in an embodiment of the present invention, the two accumulators are arranged on the valve seat, and the two accumulators are located on the same side of a center line connecting the first control valve and the second control valve.

[0018] At least one embodiment of the utility model provides a vehicle, comprising any one of the above-mentioned shock absorbers.

[0019] In the shock absorber provided by the embodiment of the utility model, the accumulator and the pipe assembly are designed independently of each other, so that the structural design and sealing design of the shock absorber are relatively simple, and the accumulator and the pipe assembly are more versatile; on the other hand, the design position of the accumulator can be adapted according to the space of the product to which it is applied, which improves the flexibility of the structural design of the shock absorber. In addition, the first control valve and the second control valve are arranged on the valve seat, which can make the structural design of the shock absorber more compact, make the structural design and sealing design of the control valve and the pipe assembly simpler, more reliable and stable, and improve the universality of the pipe assembly, the first control valve and the second control valve, and the radial size of the pipe assembly will not increase due to the control valve being installed on the pipe assembly, and the strength of the pipe assembly will not be affected. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] 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.

[0021] Figure 1 A schematic structural diagram of a shock absorber provided in one embodiment of the utility model;

[0022] Figure 2 for Figure 1 A schematic top view of the shock absorber shown;

[0023] Figure 3A for Figure 2 The schematic cross-sectional view of the shock absorber shown is taken along the section line AA;

[0024] Figure 3B for Figure 3A A schematic diagram of a partial structure of a shock absorber shown;

[0025] Figure 4 for Figure 2 A schematic cross-sectional view of the shock absorber shown along the section line BB;

[0026] Figure 5 for Figure 2 A schematic cross-sectional view of the shock absorber shown along the cutting line CC;

[0027] Figure 6 A schematic diagram of the pipe connection of another shock absorber provided in an embodiment of the utility model;

[0028] Figure 7 for Figure 1 A schematic diagram of a hydraulic oil circuit of a shock absorber shown;

[0029] Figure 8 A schematic structural diagram of another shock absorber provided in one embodiment of the utility model;

[0030] Fig. 9 for Figure 8 A schematic top view of the shock absorber shown;

[0031] Fig.10 for Fig. 9 A schematic cross-sectional view of the shock absorber shown along the cutting line DD;

[0032] Fig.11 for Fig. 9 A schematic cross-sectional view of the shock absorber shown along the cutting line EE;

[0033] Fig.12 for Fig. 9 A schematic cross-sectional view of the shock absorber shown along the section line FF;

[0034] Fig.13 A schematic diagram of the structure of another shock absorber provided by an embodiment of the utility model; and

[0035] Fig.14 for Figure 8 A schematic diagram of a hydraulic oil circuit of a shock absorber is shown. DETAILED DESCRIPTION

[0036] 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.

[0037] 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.

[0038] 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.

[0039] The embodiment of the utility model provides a shock absorber and a vehicle. The shock absorber includes a tube assembly, a piston, a piston rod, a valve seat, a first control valve and a second control valve. The tube assembly includes an inner tube and an outer tube sleeved outside the inner tube, and the tube assembly has a first end and a second end opposite to each other along its axial direction. The piston is located in the inner tube and divides the cavity of the inner tube into a first working cavity and a second working cavity, and the first working cavity is closer to the first end of the tube assembly than the second working cavity. The piston rod is connected to the piston and extends to the outside of the tube assembly via the second working cavity. The valve seat is arranged at the first end of the tube assembly, the first control valve is arranged on the valve seat and communicated with the first working cavity, and the second control valve is arranged on the valve seat. The cavity between the inner tube and the outer tube is a third working cavity, the third working cavity is communicated with the second working cavity, and the second control valve is communicated with the third working cavity.

[0040] The shock absorber further comprises at least one accumulator, the at least one accumulator being located outside the outer side wall of the outer tube, and the outer tube being located outside the space surrounded by the outer peripheral wall of the at least one accumulator. The first working chamber is communicated with the at least one accumulator via a first control valve, and the third working chamber is communicated with the at least one accumulator via a second control valve.

[0041] In the shock absorber provided by the embodiment of the utility model, the at least one accumulator is located outside the outer side wall of the outer tube, and the outer tube is located outside the space surrounded by the outer peripheral wall of the at least one accumulator. On the one hand, the at least one accumulator and the pipe assembly are designed independently of each other, and the structural design and sealing design of the shock absorber are relatively simple, and the commonality of the at least one accumulator and the pipe assembly is improved; on the other hand, the design position of the at least one accumulator can be adapted according to the space of the applied product, which improves the flexibility of the structural design of the shock absorber. The first control valve and the second control valve are arranged on the valve seat, which can make the structural design of the shock absorber more compact, and make the structural design and sealing design of the control valve and the pipe assembly simpler, more reliable and stable, and improve the commonality of the pipe assembly, the first control valve and the second control valve, and the radial size of the pipe assembly will not increase due to the control valve being installed on the pipe assembly, and the strength of the pipe assembly will not be affected.

[0042] 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.

[0043] The embodiment of the utility model provides a shock absorber. Figure 1 A schematic structural diagram of a shock absorber provided in one embodiment of the utility model; Figure 2 for Figure 1 Schematic diagram of top view; Figure 3A for Figure 2 Schematic diagram of the cross section along the cutting line AA; Figure 3B for Figure 3A Schematic diagram of the local structure; Figure 4 for Figure 2 A schematic cross-sectional view along the cutting line BB; Figure 5 for Figure 2 Schematic cross-section along cutting line CC.

[0044] like Figures 1 to 5 As shown, the shock absorber 100 includes a pipe assembly 110, a piston 120, a piston rod 130, a valve seat 140, a first control valve 151 and a second control valve 152. The pipe assembly 110 includes an inner pipe 111 and an outer pipe 112 sleeved outside the inner pipe 111, and the pipe assembly 110 has a first end 110a and a second end 110b opposite to each other along its axial direction Z. The piston 120 is located in the inner pipe 111, and divides the cavity of the inner pipe 111 into a first working cavity V11 and a second working cavity V12, and the first working cavity V11 is closer to the first end 110a of the pipe assembly 110 than the second working cavity V12. The piston rod 130 is connected to the piston 120, and extends to the outside of the pipe assembly 110 via the second working cavity V12. The valve seat 140 is disposed at the first end 110a of the tube assembly 110, the first control valve 151 is disposed on the valve seat 140 and communicates with the first working chamber V11, and the second control valve 152 is disposed on the valve seat 140. The cavity between the inner tube 111 and the outer tube 112 is the third working chamber V13, the third working chamber V13 is communicated with the second working chamber V12, and the second control valve 152 is communicated with the third working chamber V13. For example, an opening 1110 is disposed on the tube wall of the inner tube 111, and the third working chamber V13 is communicated with the second working chamber V12 through the opening 1110.

[0045] The shock absorber 100 further includes an accumulator 160, which is located outside the outer side wall 1120 of the outer tube 112, and the outer tube 112 is located outside the space surrounded by the outer peripheral wall 1600 of the accumulator 160. The first working chamber V11 is connected to the accumulator 160 via the first control valve 151, and the third working chamber V13 is connected to the accumulator 160 via the second control valve 152. The figure schematically shows an accumulator, which is not limited in the embodiment of the utility model, and the shock absorber may also include multiple accumulators.

[0046] In the shock absorber 100 provided in the embodiment of the utility model, as Figures 1 to 5 As shown, the piston 120 moves in the inner tube 111 along the axial direction Z of the tube assembly 110 under the force of the piston rod 130, and the volumes of the first working chamber V11 and the second working chamber V12 change with the movement of the piston 120. The second working chamber V12 is connected to the third working chamber V13. The first working chamber V11 is connected to the accumulator 160 via the first control valve 151, and the third working chamber V13 is connected to the accumulator 160 via the second control valve 152. Thus, the fluid in the accumulator 160 can be circulated with the fluid in the working chamber connected thereto, which is convenient for adjusting the piston 120 and the piston rod 130 and realizing the shock absorption effect. The embodiment of the utility model does not limit the structural form of the accumulator, for example, it can be a gas type, spring type or piston type accumulator.

[0047] In the prior art, the accumulator is sleeved in the space surrounded by the outer wall of the outer tube or the outer tube part is sleeved in the space surrounded by the outer peripheral wall of the accumulator, and the structural design and sealing design of the shock absorber are relatively complicated, and it is not conducive to the generalization of the pipe assembly, the control valve or the accumulator. In addition, due to the space occupied by the accumulator, the size of the shock absorber in the radial direction of the pipe assembly is large, which is not conducive to the arrangement of the shock absorber on the applied product. The control valve is arranged on the pipe assembly. Due to the installation structure of the control valve, the radial dimension of the pipe assembly is large, and the structural design and sealing design of the control valve and the pipe assembly are relatively complicated, and the strength requirement of the pipe assembly is also relatively high.

[0048] In the shock absorber provided by the embodiment of the utility model, the accumulator is located outside the outer wall of the outer tube, and the outer tube is located outside the space surrounded by the outer peripheral wall of the accumulator. On the one hand, the accumulator and the pipe assembly are designed independently of each other, and the structural design and sealing design of the shock absorber are relatively simple, and the accumulator and the pipe assembly are improved in generality; on the other hand, the design position of the accumulator can be adapted according to the space of the applied product, which improves the flexibility of the structural design of the shock absorber. For example, except for the space occupied by the accumulator, the structure at other positions of the shock absorber is relatively small in the radial direction of the pipe assembly, thereby facilitating the arrangement of the shock absorber on the applied product, for example, the products applied by the shock absorber include but are not limited to suspension systems or vehicles. The first control valve and the second control valve are arranged on the valve seat, which can make the structural design of the shock absorber more compact, make the structural design and sealing design of the control valve and the pipe assembly simpler, more reliable and stable, and improve the generality of the pipe assembly, the first control valve and the second control valve, and the radial size of the pipe assembly will not increase due to the control valve being installed on the pipe assembly, and the strength of the pipe assembly will not be affected.

[0049] In some examples, such as Figure 1 and Figure 3A As shown, the central axis L11 of the first control valve 151 is substantially perpendicular to the axial direction Z of the pipe assembly 110. For example, the central axis L12 of the second control valve 152 is substantially perpendicular to the axial direction Z of the pipe assembly 110. Of course, the embodiment of the utility model is not limited to this, and can also be designed according to actual products and needs.

[0050] In some examples, such as Figure 1 and Figure 3A As shown, the central axis L11 of the first control valve 151 and the central axis L12 of the second control valve 152 are in a straight line. Thus, the symmetry of the mounting base and the shock absorber can be improved, which facilitates the structural design of the shock absorber and the common use of parts.

[0051] In some examples, such as Figure 1 and Figure 3A As shown, the first control valve 151 and the second control valve 152 are symmetrical about the central axis L14 of the pipe assembly 110. Thus, the symmetry of the shock absorber can be further improved, the structural stability of the shock absorber can be improved, and the structural design and commonality of parts of the shock absorber can be facilitated.

[0052] In some examples, such as Figure 1 and Figure 4 As shown, the accumulator 160 is disposed on the valve seat 140. Thus, not only can the structural design of the shock absorber 100 be made more compact, but also the structural design of the accumulator 160 communicating with the first control valve 151 and the second control valve 152 can be made simpler, more reliable and more stable.

[0053] In some examples, such as Figure 1 and Figure 4 As shown, the accumulator 160 is disposed on the valve seat 140 and is located on a side of the valve seat 140 close to the pipe assembly 110. Thus, the size of the shock absorber 100 along the axial direction of the pipe assembly 110 can be made smaller, the overall size of the shock absorber 100 can be made smaller, and the structural design of the shock absorber 100 can be made more compact.

[0054] In some examples, such as Figure 1 and Figure 4 As shown, the accumulator 160 is roughly cylindrical in shape, and the axial direction of the accumulator 160 is roughly parallel to the axial direction Z of the pipe assembly 110. The accumulator 160 is disposed on the valve seat 140 and is located on a side of the valve seat 140 close to the pipe assembly 110. By making the axial direction of the accumulator 160 roughly parallel to the axial direction of the pipe assembly 110, the structural design of the shock absorber 100 can be made more compact.

[0055] In some examples, such as Figure 1 and Figure 4 As shown, the shape of the accumulator 160 is generally cylindrical, and the radial dimension of the accumulator 160 is not greater than the radial dimension of the pipe assembly 110. Therefore, the space occupied by the accumulator 160 in the radial direction can be reduced as much as possible, making the structure of the shock absorber more compact.

[0056] In some examples, such as Figure 1 and Figure 4 As shown, the accumulator 160 is disposed on the valve seat 140 and is located on a side of the valve seat 140 close to the pipe assembly 110. The accumulator 160 is disposed approximately symmetrically with respect to the mid-vertical plane P11 of the center line L13 of the first control valve 151 and the second control valve 152. For example, the pipe assembly 110 is disposed approximately symmetrically with respect to the mid-vertical plane P11 of the center line L13 of the first control valve 151 and the second control valve 152. Thus, the structural symmetry of the shock absorber 100 is improved, the structural design of the shock absorber 100 is facilitated, and the components are common, making the structural design of the shock absorber 100 more compact.

[0057] In some examples, such as Figure 3A and Figure 3B As shown, the valve seat 140 includes a connecting portion 1400 and a first cylindrical mounting portion 1401 and a second cylindrical mounting portion 1402 respectively connected to the connecting portion 1400, the first cylindrical mounting portion 1401 includes a first mounting cavity 1401a, the first mounting cavity 1401a has a first opening 1401b away from the side of the connecting portion 1400 so that the first control valve 151 can be installed in the first mounting cavity 1401a via the first opening 1401b, the second cylindrical mounting portion 1402 includes a second mounting cavity 1402a, the second mounting cavity 1402a has a second opening 1402b away from the side of the connecting portion 1400 so that the second control valve 152 can be installed in the second mounting cavity 1402a via the second opening 1402b, and the first cylindrical mounting portion 1401 and the second cylindrical mounting portion 1402 are integrally formed with the connecting portion 1400.

[0058] The first cylindrical mounting portion and the second cylindrical mounting portion for mounting the control valve are integrally formed with the connecting portion, thereby not only making the installation of the control valve simple, but also facilitating the disassembly and replacement of the control valve, and facilitating later after-sales maintenance. For example, when inspecting or replacing the control valve, only the control valve needs to be disassembled, and the valve seat and the shock absorber do not need to be disassembled or replaced, which greatly reduces the after-sales cost of the shock absorber.

[0059] In some examples, such as Figure 1 , Figure 3A and Figure 5As shown, the first control valve 151 includes a first one-way throttle valve 1510, and the first one-way throttle valve 1510 includes a first one-way opening channel 1510a and a first throttling channel 1510b. The two ends of the first throttling channel 1510b are respectively connected to the first working chamber V11 and the accumulator 160. The two ends of the first one-way opening channel 1510a are respectively connected to the first working chamber V11 and the accumulator 160, and the first one-way opening channel 1510a is configured to open when the fluid flows from the accumulator 160 to the first working chamber V11. The shock absorbing effect of the shock absorber 100 can be achieved by the first one-way throttle valve 1510. For example, by adjusting the parameters such as the size of the first one-way opening channel 1510a and the first throttling channel 1510b, the shock absorbing performance of the shock absorber 100 can be adjusted to meet more needs.

[0060] In some examples, such as 1, Figure 3A and Figure 5 As shown, the second control valve 152 includes a second one-way throttle valve 1520, and the second one-way throttle valve 1520 includes a second one-way opening channel 1520a and a second throttling channel 1520b. The two ends of the second throttling channel 1520b are respectively connected to the third working chamber V13 and the accumulator 160. The two ends of the second one-way opening channel 1520a are respectively connected to the third working chamber V13 and the accumulator 160, and the second one-way opening channel 1520a is configured to open when the fluid flows from the accumulator 160 to the third working chamber V13. The shock absorbing effect of the shock absorber 100 can be achieved by the second one-way throttle valve 1520. For example, by adjusting the parameters such as the size of the second one-way opening channel 1520a and the second throttling channel 1520b, the shock absorbing performance of the shock absorber 100 can be adjusted to meet more needs.

[0061] In some examples, such as Figures 1 to 5 As shown, the shock absorber 100 includes an accumulator 160a, the first working chamber V11 is communicated with the accumulator 160a via the first control valve 151, and the second working chamber V12 is communicated with the accumulator 160a via the second control valve 152. The fluids in the first working chamber V11, the second working chamber V12, and the third working chamber V13 in the pipe assembly 110 can flow with the fluid in the accumulator 160a, thereby reducing the number of accumulators of the shock absorber 100, reducing the space occupied by the accumulators of the shock absorber 100, saving costs, and reducing the weight of the shock absorber 100.

[0062] In some examples, such as Figure 1 and Figure 5As shown, the first control valve 151, the second control valve 152 and the accumulator 160a are all arranged on the valve seat 140, and the valve seat 140 includes a connecting channel 141, and the connecting channel 141 includes ports 141a, 141b and 141c, and ports 141a, 141b and 141c are respectively connected to the first control valve 151, the second control valve 152 and the accumulator 160a. Therefore, the first control valve 151 can be connected to the accumulator 160a, and the second control valve 152 can be connected to the accumulator 160a through the connecting channel 141 in the valve seat 140, without adding additional structures or pipelines, etc., so that the structural design of the shock absorber 100 is more compact. It should be noted that Figure 5 Only the cross section of the communication channel 140 at the cutting plane CC is shown. For example, the communication channel may be T-shaped, with three ports at three ends of the T-shape.

[0063] In some examples, such as Figure 4 As shown, the valve seat 140 also includes a first oil inlet and outlet port 171 and a second oil inlet and outlet port 172, and the first oil inlet and outlet port 171 and the second oil inlet and outlet port 172 are connected to the first working chamber V11 and the third working chamber V13 respectively. For example, the first working chamber V11 and the third working chamber V13 can be filled with oil or discharged with oil through the first oil inlet and outlet port 171 and the second oil inlet and outlet port 172 respectively. For example, the first oil inlet and outlet port 171 and the second oil inlet and outlet port 172 can facilitate the maintenance of the shock absorber 100. For example, the first working chamber V11 and the third working chamber V13 can be connected to an external pump through the first oil inlet and outlet port 171 and the second oil inlet and outlet port 172 respectively, and the oil between the first working chamber V11 and the third working chamber V13 is circulated through the pump to achieve a rapid response of the shock absorber. It should be noted that Figure 4 Due to the limitation of the section plane, only the section of the first oil inlet and outlet port 171 and the partial position of the second oil inlet and outlet port 172 is shown. Figure 3A As shown, the first oil inlet and outlet port 171 can be communicated with the first working chamber V11 through the channel 142 , and the second oil inlet and outlet port 172 can be communicated with the third working chamber V13 through the channel 143 .

[0064] In some examples, such as Figure 4 As shown, the first oil inlet and outlet port 171 and the second oil inlet and outlet port 172 are arranged on the same side of the valve seat 140. For example, the first oil inlet and outlet port 171 and the second oil inlet and outlet port 172 and the accumulator 160 are respectively located on opposite sides of the valve seat 140. Thus, it is convenient to design the passage between the oil inlet and outlet port and the working chamber in the valve seat 140, avoiding affecting the communication passage between the accumulator and the control valve. In addition, the side where the oil inlet and outlet port is located can have a larger operating space for operations such as oil inlet or oil discharge.

[0065] Figure 6This is a schematic diagram of the pipe connection of another shock absorber provided by the embodiment of the utility model. Figure 6 As shown, the shock absorber 100 further includes a first hose 181 and a second hose 182. The first working chamber V11 is connected to the accumulator 160 via the first control valve 151 and the first hose 181, and the third working chamber V13 is connected to the accumulator 160 via the second control valve 152 and the second hose 182. The accumulator 160 is connected to the first control valve 151 and the second control valve 152 through the first hose 181 and the second hose 182, so that the position of the accumulator 160 can be flexibly designed according to the space of the product to which the shock absorber is applied, making the structural design of the shock absorber more flexible and diversified.

[0066] For example, Figure 6 As shown, the structure design of the pipe assembly 110 and the valve seat 140 of the shock absorber 100 can be as follows Figure 1 As shown, no further details will be given here. For example, Figure 1 The accumulator 160 may be disposed on the valve seat 140. Figure 6 The accumulator 160 shown is connected to the first control valve 151 and the second control valve 152 disposed on the valve seat 140 through the first hose 181 and the second hose 182 respectively.

[0067] Figure 7 for Figure 1 A schematic diagram of a hydraulic oil circuit of a shock absorber is shown in FIG. Figure 1 , Figure 3A and Figure 7 As shown, when the shock absorber 100 is in the compression stroke, the volume of the first working chamber V11 decreases, and the fluid in the first working chamber V11 flows to the accumulator 160a or to the third working chamber V13 through the first control valve 151. When the shock absorber 100 is in the compression stroke, the volume of the second working chamber V12 increases, and the fluid in the accumulator 160a flows into the second working chamber V12 through the second control valve 152 and the third working chamber V13.

[0068] For example, Figure 1 , Figure 3A and Figure 7 As shown, when the shock absorber 100 is in the extension stroke, the volume of the second working chamber V12 decreases, and the fluid in the second working chamber V12 flows into the accumulator 160a or flows to the first working chamber V11 via the third working chamber V13 and the second control valve 152. When the shock absorber 100 is in the extension stroke, the volume of the first working chamber V11 increases, and the fluid in the accumulator 160a flows to the first working chamber V11 via the first control valve 151.

[0069] In some examples, such as Figure 7As shown, the shock absorber 100 can also be connected to a hydraulic device, which includes a pump 11 and a motor 12. For example, when the hydraulic device is working, the fluid in the first working chamber V11 can be circulated with the fluid in the second working chamber V12 and the third working chamber V13 through the hydraulic device. Through the hydraulic device, the response of the shock absorber 100 to external changes can be improved.

[0070] Figure 8 A schematic structural diagram of another shock absorber provided in one embodiment of the utility model; Fig. 9 for Figure 8 Schematic diagram of top view; Fig.10 for Fig. 9 Schematic diagram of the cross section along the cutting line DD; Fig.11 for Fig. 9 Schematic cross-section along the cutting line EE; Fig.12 for Fig. 9 Schematic cross-section along the cutting line FF.

[0071] like Figures 8 to 12 As shown, the shock absorber 200 includes a pipe assembly 210, a piston 220, a piston rod 230, a valve seat 240, a first control valve 251 and a second control valve 252. The pipe assembly 210 includes an inner pipe 211 and an outer pipe 212 sleeved outside the inner pipe 211, and the pipe assembly 210 has a first end 210a and a second end 210b opposite to each other along its axial direction Z. The piston 220 is located in the inner pipe 211, and divides the cavity of the inner pipe 211 into a first working cavity V21 and a second working cavity V22, and the first working cavity V21 is closer to the first end 210a of the pipe assembly 210 than the second working cavity V22. The piston rod 230 is connected to the piston 220, and extends to the outside of the pipe assembly 210 via the second working cavity V22. The valve seat 240 is disposed at the first end 210a of the tube assembly 210, the first control valve 251 is disposed on the valve seat 240 and communicates with the first working chamber V21, and the second control valve 252 is disposed on the valve seat 240. The cavity between the inner tube 211 and the outer tube 212 is the third working chamber V23, the third working chamber V23 is communicated with the second working chamber V22, and the second control valve 252 is communicated with the third working chamber V23. For example, an opening 2110 is disposed on the tube wall of the inner tube 211, and the third working chamber V23 is communicated with the second working chamber V22 through the opening 2110.

[0072] The shock absorber 200 includes two accumulators, the two accumulators are a first accumulator 260a and a second accumulator 260b, the first accumulator 260a and the second accumulator 260b are both located outside the outer side wall 2120 of the outer tube 212, and the outer tube 212 is both located outside the space surrounded by the outer peripheral wall 2600a of the first accumulator 260a and the outer peripheral wall 2600b of the second accumulator 260b. The first accumulator 260a is connected to the first working chamber V21 via the first control valve 251, and the second accumulator 260b is connected to the third working chamber V23 via the second control valve 252.

[0073] In the shock absorber provided by the embodiment of the utility model, the two accumulators and the pipe assembly are designed independently of each other, the structural design and sealing design of the shock absorber are relatively simple, and the accumulator and the pipe assembly are more versatile; on the other hand, the design positions of the two accumulators can be adapted according to the space of the applied product, which improves the flexibility of the structural design of the shock absorber. For example, except for the space occupied by the two accumulators, the structure at other positions of the shock absorber is relatively small in the radial direction of the pipe assembly, thereby facilitating the arrangement of the shock absorber on the applied product. The first control valve and the second control valve are arranged on the valve seat, which can make the structural design of the shock absorber more compact, and make the structural design and sealing design of the control valve and the pipe assembly simpler, more reliable and more stable, and improve the universality of the pipe assembly, the first control valve and the second control valve, and the radial size of the pipe assembly will not increase due to the control valve being installed on the pipe assembly, and the strength of the pipe assembly will not be affected.

[0074] Figure 8 The shock absorber shown includes two accumulators, Figure 1 The shock absorber shown includes an accumulator, except that the number of accumulators is different, with respect to Figure 8 Other structures of the shock absorber shown in the figure, such as the integrally formed structure of the valve seat, the position of the control valve and the matching structure with the valve seat, etc., can be the same. Figure 1 The shock absorbers shown will not be described in detail here.

[0075] In some examples, such as Figure 8 and Fig.10 As shown, the central axis L21 of the first control valve 251 is substantially perpendicular to the axial direction Z of the pipe assembly 210 . For example, the central axis L22 of the second control valve 252 is substantially perpendicular to the axial direction Z of the pipe assembly 210 .

[0076] In some examples, such as Figure 8 and Fig.10As shown, the central axis L21 of the first control valve 251 and the central axis L22 of the second control valve 252 are in a straight line. For example, the central axis L21 of the first control valve 251 and the central axis L22 of the second control valve 252 are in a straight line, and the central axis L21 of the first control valve 251 and the central axis L22 of the second control valve 252 are both perpendicular to the axial direction Z of the pipe assembly 210. Thus, the first control valve 251 and the second control valve 252 are roughly symmetrical about the central axis L24 of the pipe assembly 210, which improves the structural symmetry of the shock absorber 200, facilitates the structural design of the shock absorber 200, and the commonality of parts and components, and facilitates the spatial arrangement of the shock absorber 200 on the applied product.

[0077] In some examples, such as Figure 8 As shown, the first accumulator 260a and the second accumulator 260b are both disposed on the valve seat 240. Thus, not only can the structural design of the shock absorber 200 be made more compact, but also the structural design in which the first accumulator 260a and the second accumulator 260b are respectively connected to the first control valve 251 and the second control valve 252 can be made simpler, more reliable and more stable.

[0078] In some examples, such as Figure 8 As shown, the first accumulator 260a and the second accumulator 260b are both disposed on the valve seat 240 and are located on a side of the valve seat 240 close to the pipe assembly 210. Thus, the size of the shock absorber 200 along the axial direction of the pipe assembly 210 can be made smaller, the overall size of the shock absorber 200 can be made smaller, and the structural design of the shock absorber 200 can be made more compact.

[0079] In some examples, such as Figure 8 As shown, the first accumulator 260a and the second accumulator 260b are both roughly cylindrical in shape, and the axial directions of the first accumulator 260a and the second accumulator 260b are both roughly parallel to the axial direction Z of the pipe assembly 210. The first accumulator 260a and the second accumulator 260b are arranged on the valve seat 240 and are located on the side of the valve seat 240 close to the pipe assembly 210. By making the axial directions of the first accumulator 260a and the second accumulator 260b roughly parallel to the axial direction Z of the pipe assembly 210, the structural design of the shock absorber 200 can be made more compact.

[0080] In some examples, such as Figure 8 As shown, the first accumulator 260a and the second accumulator 260b are both roughly cylindrical in shape, and the radial dimensions of the first accumulator 260a and the second accumulator 260b are not greater than the radial dimensions of the pipe assembly 110. Thus, the space occupied by the accumulator in the radial direction can be minimized, making the structure of the shock absorber more compact.

[0081] In some examples, such as Figure 8 and Fig. 9 As shown, the first accumulator 260a and the second accumulator 260b are arranged approximately symmetrically with respect to the mid-vertical plane P21 of the center line L23 of the first control valve 251 and the second control valve 252. For example, the pipe assembly 210 is arranged approximately symmetrically with respect to the mid-vertical plane P21 of the center line L23 of the first control valve 251 and the second control valve 252. Thus, the structural symmetry of the shock absorber 200 is improved, the structural design of the shock absorber 200 is facilitated, and the components are common, making the structural design of the shock absorber 200 more compact.

[0082] In some examples, such as Figure 8 , Fig.10 and Fig.11 As shown, the first control valve 251 includes a first one-way throttle valve 2510, and the first one-way throttle valve 2510 includes a first one-way opening channel 2510a and a first throttling channel 2510b. The two ends of the first throttling channel 2510b are respectively connected to the first working chamber V21 and the first accumulator 260a. The two ends of the first one-way opening channel 2510a are respectively connected to the first working chamber V21 and the first accumulator 260a, and the first one-way opening channel 2510a is configured to open when the fluid flows from the first accumulator 260a to the first working chamber V21. The shock absorbing effect of the shock absorber 200 can be achieved by the first one-way throttle valve 2510. For example, by controlling the parameters such as the size of the first one-way opening channel 2510a and the first throttling channel 2510b, the shock absorbing performance of the shock absorber 200 can be adjusted to meet more needs.

[0083] For example, Fig.10 and Fig.11 As shown, the valve seat 240 further includes a passage 241 , and the first accumulator 260 a is in communication with the first control valve 251 through the passage 241 .

[0084] In some examples, such as Figure 8 , Fig.10 and Fig.12 As shown, the second control valve 252 includes a second one-way throttle valve 2520, and the second one-way throttle valve 2520 includes a second one-way opening channel 2520a and a second throttling channel 2520b. The two ends of the second throttling channel 2520b are respectively connected to the third working chamber V23 and the second accumulator 260b. The two ends of the second one-way opening channel 2520a are respectively connected to the third working chamber V23 and the second accumulator 260b, and the second one-way opening channel 2520a is configured to open when the fluid flows from the second accumulator 260b to the third working chamber V23. The shock absorbing effect of the shock absorber 200 can be achieved by the second one-way throttle valve. For example, by controlling the parameters such as the size of the second one-way opening channel and the second throttling channel 1520b, the shock absorbing performance of 200 can be adjusted to meet more needs.

[0085] For example, Fig.10 and Fig.12 As shown, the valve seat 240 further includes a channel 242, and the second accumulator 260b is communicated with the second control valve 252 through the channel 242. Thus, the structure of the shock absorber can be made more compact.

[0086] For example, Fig. 9 As shown, the valve seat 240 further includes a first oil inlet and outlet port 271 and a second oil inlet and outlet port 272. Fig.10 As shown, the first oil inlet and outlet port 271 can be communicated with the first working chamber V21 through the channel 242, and the second oil inlet and outlet port 272 can be communicated with the third working chamber V23 through the channel 243. The functions of the first oil inlet and outlet port 271 and the second oil inlet and outlet port 272 are the same as those of the previous embodiment, and will not be repeated here.

[0087] In some examples, such as Fig. 9 As shown, the first oil inlet and outlet port 271 and the second oil inlet and outlet port 272 are arranged on the same side of the valve seat 240. For example, the first oil inlet and outlet port 271 and the second oil inlet and outlet port 272 and the first accumulator 260a and the second accumulator 260b are respectively located on opposite sides of the valve seat 240. Thus, it is convenient to design the channel in the valve seat 240. In addition, the side where the oil inlet and outlet port is located can have a larger operating space for operations such as oil inlet or oil outlet.

[0088] In some examples, such as Figure 8 and Fig. 9 As shown, the first accumulator 260a and the second accumulator 260b are arranged on the valve seat 240, and the first accumulator 260a and the second accumulator 260b are located on the same side of the center line L23 of the first control valve 251 and the second control valve 252. Thus, the structure of the first accumulator 260a and the second accumulator 260b and the first control valve 251 and the second control valve 252 can be made more compact. Of course, the embodiment of the utility model is not limited to this, and the relative position relationship between the accumulator and the control valve can be designed according to the requirements.

[0089] Fig.13 The following is a schematic diagram of the structure of another shock absorber provided by the embodiment of the utility model. Fig.13As shown, the shock absorber 200 further includes a first hose 281 and a second hose 282. The first working chamber V21 is connected to the first accumulator 260a via the first control valve 251 and the first hose 281, and the third working chamber V23 is connected to the second accumulator 260b via the second control valve 252 and the second hose 282. Thus, the positions of the first accumulator 260a and the second accumulator 260b can be flexibly designed according to the space of the product to which the shock absorber is applied, making the structural design of the shock absorber more flexible and diversified.

[0090] For example, Fig.13 As shown, the structure design of the pipe assembly 210 and the valve seat 240 of the shock absorber 200 can be as follows Figure 8 As shown, no further details will be given here. For example, Figure 8 The first accumulator 260a and the second accumulator 260b may be disposed on the valve seat 240. Fig.13 The first accumulator 260 a and the second accumulator 260 b are connected to the first control valve 251 and the second control valve 252 disposed on the valve seat 240 through the first hose 281 and the second hose 282 , respectively.

[0091] Fig.14 for Figure 8 A schematic diagram of a hydraulic oil circuit of a shock absorber is shown in FIG. Figure 8 , Fig.10 and Fig.13 As shown, when the shock absorber 200 is in the compression stroke, the volume of the first working chamber V21 decreases, and the fluid in the first working chamber V21 flows to the first accumulator 260a or to the third working chamber V23 through the first control valve 251. When the shock absorber 200 is in the compression stroke, the volume of the second working chamber V22 increases, and the fluid in the second accumulator 260b flows into the second working chamber V22 through the second control valve 252 and the third working chamber V23.

[0092] For example, Figure 8 , Fig.10 and Fig.13 As shown, when the shock absorber 200 is in the extension stroke, the volume of the second working chamber V22 decreases, and the fluid in the second working chamber V22 flows into the second accumulator 260b or flows to the first working chamber V21 via the third working chamber V23 and the second control valve 252. When the shock absorber 200 is in the extension stroke, the volume of the first working chamber V21 increases, and the fluid in the first accumulator 260a flows to the first working chamber V21 via the first control valve 251.

[0093] In some examples, such as Fig.14As shown, the shock absorber 200 can also be connected to a hydraulic device, which includes a pump 21 and a motor 22. For example, when the hydraulic device is working, the fluid in the first working chamber V21 can be circulated with the fluid in the second working chamber V22 and the third working chamber V23 through the hydraulic device, and the response of the shock absorber 200 to external changes can be improved through the hydraulic device.

[0094] 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.

[0095] There are a few points to note:

[0096] (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.

[0097] (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.

[0098] 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, wherein the pipe assembly has a first end and a second end opposite to each other along an axial direction thereof; a piston, located in the inner tube and dividing the cavity of the inner tube into a first working cavity and a second working cavity, wherein the first working cavity is closer to the first end of the tube assembly than the second working cavity; a piston rod connected to the piston and extending to the outside of the pipe assembly through the second working chamber, a valve seat disposed at the first end of the pipe assembly; A first control valve, disposed on the valve seat; A second control valve is disposed on the valve seat, Wherein, the cavity between the inner tube and the outer tube is a third working cavity, the third working cavity is communicated with the second working cavity, and the second control valve is communicated with the third working cavity. The shock absorber further comprises at least one accumulator, wherein the at least one accumulator is located outside the outer side wall of the outer tube, and the outer tube is located outside the space surrounded by the outer peripheral wall of the at least one accumulator. The first working chamber is communicated with the at least one accumulator via the first control valve, and the third working chamber is communicated with the at least one accumulator via the second control valve.

2. The shock absorber according to claim 1, characterized in that: The central axes of the first control valve and the second control valve are both perpendicular to the axial direction of the pipe assembly.

3. The shock absorber according to claim 1, characterized in that A central axis of the first control valve and a central axis of the second control valve are in a straight line.

4. The shock absorber according to claim 1, characterized in that: The at least one accumulator is disposed on the valve seat and is located at a side of the valve seat close to the pipe assembly.

5. The shock absorber according to claim 4, characterized in that The at least one accumulator is cylindrical in shape, and an axial direction of the at least one accumulator is parallel to an axial direction of the pipe assembly.

6. The shock absorber according to claim 4, characterized in that The at least one accumulator is cylindrical in shape, and a radial dimension of the at least one accumulator is not greater than a radial dimension of the pipe assembly.

7. The shock absorber according to claim 4, characterized in that The at least one accumulator is symmetrically arranged with respect to a vertical midplane connecting the centers of the first control valve and the second control valve, and the pipe assembly is symmetrically arranged with respect to the vertical midplane.

8. The shock absorber according to claim 1, characterized in that The valve seat includes a connecting portion and a first cylindrical mounting portion and a second cylindrical mounting portion respectively connected to the connecting portion, the first cylindrical mounting portion includes a first mounting cavity, the first mounting cavity has a first opening away from the connecting portion so that the first control valve can be installed in the first mounting cavity via the first opening, the second cylindrical mounting portion includes a second mounting cavity, the second mounting cavity has a second opening away from the connecting portion so that the second control valve can be installed in the second mounting cavity via the second opening, and the first cylindrical mounting portion and the second cylindrical mounting portion are integrally formed with the connecting portion.

9. The shock absorber according to claim 8, characterized in that The first control valve includes a first one-way throttle valve, the first one-way throttle valve includes a first one-way opening channel and a first throttling channel, both ends of the first throttling channel are respectively connected to the first working chamber and the at least one accumulator, both ends of the first one-way opening channel are respectively connected to the first working chamber and the at least one accumulator, and the first one-way opening channel is configured to open when fluid flows from the at least one accumulator to the first working chamber. The second control valve includes a second one-way throttle valve, which includes a second one-way opening channel and a second throttling channel, wherein both ends of the second throttling channel are respectively connected to the third working chamber and the at least one accumulator, and both ends of the second one-way opening channel are respectively connected to the third working chamber and the at least one accumulator, and the second one-way opening channel is configured to open when the fluid flows from the at least one accumulator to the third working chamber.

10. The shock absorber according to claim 1, characterized in that Also includes a first hose and a second hose, The first working chamber is communicated with the at least one accumulator via the first control valve and a first hose, and the third working chamber is communicated with the at least one accumulator via the second control valve and the second hose.

11. The shock absorber according to claim 1, characterized in that The valve seat further includes a first oil inlet and outlet port and a second oil inlet and outlet port, wherein the first oil inlet and outlet port is communicated with the first working chamber, and the second oil inlet and outlet port is communicated with the third working chamber.

12. The shock absorber according to claim 11, characterized in that The first oil inlet and outlet port and the second oil inlet and outlet port are arranged on the same side of the valve seat, and are located on two opposite sides of the valve seat with the at least one accumulator.

13. The shock absorber according to any one of claims 1 to 12, characterized in that: The at least one accumulator is disposed on the valve seat. The valve seat includes a communication channel. The communication channel includes three ports. The three ports are respectively connected to the first control valve, the second control valve and the at least one accumulator.

14. The shock absorber according to any one of claims 1 to 12, characterized in that: The at least one accumulator includes two accumulators, the two accumulators are a first accumulator and a second accumulator, the first accumulator is communicated with the first working chamber via the first control valve, and the second accumulator is communicated with the third working chamber via the second control valve.

15. The shock absorber according to claim 14, characterized in that The two accumulators are arranged on the valve seat, and the two accumulators are located on the same side of a center line connecting the first control valve and the second control valve.

16. A vehicle, characterized in that: Comprising a shock absorber according to any one of claims 1-15.

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