Vehicle shock absorber and vehicle

Abstract

The present disclosure relates to a vehicle shock absorber and a vehicle, the vehicle shock absorber comprises a first cylinder body, a second cylinder body, a piston rod, a first damping regulating valve, and a second damping regulating valve; the first cylinder body has a first chamber filled with a fluid; the second cylinder body is sleeved outside the second cylinder body, and the second cylinder body has a second chamber; the piston rod is inserted into the first cylinder body so as to be movable up and down, the piston rod comprises a rod body and a piston, the piston is located in the first chamber, and divides the first chamber into an upper chamber and a lower chamber; the first damping regulating valve is located in the first chamber and fixed on the piston rod, the inlet of the first damping regulating valve is connected to the upper chamber, and the outlet of the first damping regulating valve is connected to the lower chamber; the second damping regulating valve is installed on the second cylinder body and is at least partially located outside the second cylinder body. Since the first damping regulating valve is located inside the first cylinder body, it will not occupy too much space around the vehicle shock absorber, and it is more convenient to install and arrange the vehicle shock absorber.

Description

Technical Field

[0001] The present disclosure relates to the technical field of vehicles, and in particular, to a vehicle shock absorber and a vehicle. Background Art

[0002] In order to improve the damping effect of the vehicle shock absorber, in the prior art, multiple damping regulating valves are generally provided. When the vehicle shock absorber is stretched or compressed, the fluid in the cylinder body adjusts the compression damping and the restoring damping through the damping regulating valve. However, the existing arrangement of multiple damping regulating valves will result in a larger overall volume of the vehicle shock absorber, which is not conducive to installing the vehicle shock absorber on the vehicle body. Summary of the invention

[0003] The purpose of the present disclosure is to provide a vehicle shock absorber and a vehicle, which solve the technical problems existing in the related art.

[0004] In order to achieve the above object, according to a first aspect of the present disclosure, a vehicle shock absorber is provided, comprising:

[0005] A first cylinder; the first cylinder has a first chamber, and the first chamber is filled with a fluid;

[0006] A second cylinder body, which is sleeved on the second cylinder body, and has a second chamber in the second cylinder body;

[0007] A piston rod is inserted into the first cylinder body so as to be movable up and down, the piston rod comprises a rod body and a piston, the piston is located in the first chamber and divides the first chamber into an upper chamber and a lower chamber;

[0008] a first damping regulating valve, located in the first chamber and fixed on the piston rod, wherein the inlet of the first damping regulating valve is communicated with the upper chamber, and the outlet of the first damping regulating valve is communicated with the lower chamber;

[0009] a second damping regulating valve, mounted on the second cylinder body and at least partially outside the second cylinder body, the inlet of the second damping regulating valve being in communication with the lower chamber, and the outlet of the second damping regulating valve being in communication with the second chamber;

[0010] The vehicle shock absorber has a tension state and a compression state. In the tension state, the piston rod moves upward, and the fluid in the upper chamber can flow into the lower chamber via the first damping regulating valve; in the compression state, the piston rod moves downward, and the fluid in the lower chamber can flow into the second chamber via the second damping regulating valve.

[0011] Optionally, the vehicle shock absorber also includes a third cylinder body, which has a third chamber. The third cylinder body is located in the second cylinder body and is mounted outside the first cylinder body. A first flow channel is formed on the first cylinder body, and the first flow channel connects the lower chamber with the third chamber. The inlet of the second damping regulating valve is connected to the third chamber.

[0012] Optionally, a second flow channel is further formed on the first cylinder body, a first end of the second flow channel is communicated with the lower chamber, and a second end of the second flow channel is communicated with the second chamber.

[0013] Optionally, the vehicle shock absorber further comprises a first valve component, which in the stretched state can allow the fluid in the second chamber to flow into the lower chamber, and in the compressed state can prevent the fluid in the lower chamber from flowing into the second chamber.

[0014] Optionally, the first valve component includes a first mounting shaft and a first elastic baffle fixed on the first mounting shaft, the first mounting shaft is mounted on the first cylinder body, the first elastic baffle is located in the lower chamber, and the first elastic baffle can cover or expose the first end of the second flow channel;

[0015] In the stretched state, the fluid pressure in the second chamber is greater than the fluid pressure in the lower chamber, the fluid in the second chamber flows into the second flow channel and pushes the first elastic baffle to deform to expose the first end of the second flow channel, and in the compressed state, the fluid pressure in the lower chamber is greater than the fluid pressure in the second chamber, and the first elastic baffle adheres to the inner surface of the first cylinder body and covers the first end of the second flow channel under the action of the fluid pressure in the lower chamber.

[0016] Optionally, a third flow channel is formed on the piston, and the third flow channel connects the upper chamber and the lower chamber.

[0017] Optionally, the vehicle shock absorber also includes a second valve component, which, in the stretched state, can allow the fluid in the first damping regulating valve to flow into the lower chamber from the outlet of the first damping regulating valve, and in the compressed state, the second valve component can prevent the fluid in the lower chamber from flowing into the first damping regulating valve from the outlet of the first damping regulating valve.

[0018] Optionally, the first damping regulating valve is connected between the rod body and the piston, a fourth flow channel is formed on the piston, a first end of the fourth flow channel is connected to an outlet of the first damping regulating valve, a second end of the fourth flow channel is connected to the lower chamber, and the second valve component is installed on the piston.

[0019] Optionally, the second valve component includes a second mounting shaft and a second elastic baffle fixed on the second mounting shaft, the second mounting shaft is mounted on the piston, the second elastic baffle is located in the lower chamber, and the second elastic baffle can cover or expose the second end of the fourth flow channel;

[0020] In the stretched state, the fluid pressure in the upper chamber is greater than the fluid pressure in the lower chamber, and the fluid in the upper chamber flows into the first damping regulating valve and the fourth flow channel in sequence and pushes the second elastic baffle to deform to expose the second end of the fourth flow channel. In the compressed state, the fluid pressure in the lower chamber is greater than the fluid pressure in the upper chamber, and the second elastic baffle adheres to the piston and covers the second end of the fourth flow channel under the action of the fluid pressure in the lower chamber.

[0021] According to a second aspect of the present disclosure, a vehicle is provided, comprising the vehicle shock absorber as described above.

[0022] Through the above technical scheme, when the vehicle shock absorber is in a stretched state, the piston rod moves upward, and the fluid in the upper chamber can flow into the lower chamber through the first damping regulating valve. In the process of the fluid flowing into the lower chamber through the first damping regulating valve, the first damping regulating valve can adjust the flow rate flowing into the lower chamber to achieve the purpose of adjusting the damping force of the vehicle shock absorber in the stretched state; when the vehicle shock absorber is in a compressed state, the piston rod moves downward, and the fluid in the lower chamber can flow into the second damping regulating valve and enter the second chamber. At this time, the second damping regulating valve can adjust the flow rate flowing into the lower chamber to achieve the purpose of adjusting the damping force of the vehicle shock absorber in the compressed state, thereby realizing independent adjustment of the damping in the stretched state and the compressed state.

[0023] Furthermore, since the first damping regulating valve is arranged inside the first cylinder, it will not occupy too much space around the vehicle shock absorber, making it easier to install and arrange the vehicle shock absorber.

[0024] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0026] Figure 1 is a cross-sectional view of a vehicle shock absorber provided by an exemplary embodiment of the present disclosure, wherein the vehicle shock absorber is in a stretched state, and arrows indicate the flow direction of the fluid in the stretched state;

[0027] Figure 2 is a cross-sectional view of a vehicle shock absorber provided by an exemplary embodiment of the present disclosure, wherein the vehicle shock absorber is in a compressed state, and arrows indicate the flow direction of the fluid in the compressed state;

[0028] Figure 3 yes Figure 2 A magnified view of part A;

[0029] Figure 4 yes Figure 2 Enlarged view of part B.

[0030] Description of Reference Numerals

[0031] 1-vehicle shock absorber; 10-first cylinder body; 11-first chamber; 12-first flow channel; 13-second flow channel; 110-upper chamber; 120-lower chamber; 20-second cylinder body; 21-second chamber; 30-third cylinder body; 31-third chamber; 40-piston rod; 41-rod body; 42-piston; 421-third flow channel; 422-fourth flow channel; 50-first damping regulating valve; 60-second damping regulating valve; 70-first valve component; 71-first mounting shaft; 72-first elastic baffle; 80-second valve component; 81-second mounting shaft; 82-second elastic baffle. DETAILED DESCRIPTION

[0032] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0033] In the present disclosure, unless otherwise stated, directional words such as "up" and "down" are generally defined based on the up and down state of a vehicle under normal driving. Figure 1 In addition, "inside" and "outside" refer to the inside and outside of the corresponding structure or component outline; "far" and "near" refer to the distance from the corresponding structure or component.

[0034] In order to improve the adjustment ability of the vehicle shock absorber 1 during the stretching and compression process, a plurality of damping regulating valves are generally arranged on the outside of the cylinder body. In this way, during the operation of the vehicle shock absorber 1, the damping of the fluid can be adjusted through the damping regulating valve during the stretching and compression process. However, if the plurality of damping regulating valves are arranged on the outside of the cylinder body, this will undoubtedly increase the occupied space of the vehicle shock absorber 1, which is inconvenient for the installation and arrangement of the vehicle shock absorber 1.

[0035] Based on this, according to the first aspect of the present disclosure, referring to Figure 1-Figure 4As shown, a vehicle shock absorber 1 is provided, comprising: a first cylinder body 10 , a second cylinder body 20 , a piston rod 40 , a first damping regulating valve 50 and a second damping regulating valve 60 . Among them, the first cylinder body 10 has a first chamber 11, and the first chamber 11 is filled with fluid; the second cylinder body 20 is sleeved outside the second cylinder body 20, and the second cylinder body 20 has a second chamber 21; the piston rod 40 can be inserted into the first cylinder body 10 so as to move up and down, and the piston rod 40 includes a rod body 41 and a piston 42, the piston 42 is located in the first chamber 11, and divides the first chamber 11 into an upper chamber 110 and a lower chamber 120; the first damping regulating valve 50 is located in the first chamber 11 and fixed on the piston rod 40, the inlet of the first damping regulating valve 50 is connected to the upper chamber 110, and the outlet of the first damping regulating valve 50 is connected to the lower chamber 120; the second damping regulating valve 60 is installed on the second cylinder body 20 and is at least partially located outside the second cylinder body 20, the inlet of the second damping regulating valve 60 is connected to the lower chamber 120, and the outlet of the second damping regulating valve 60 is connected to the second chamber 21.

[0036] The above-mentioned vehicle shock absorber 1 has a tension state and a compression state. In the tension state, the piston rod 40 moves upward, and the fluid in the upper chamber 110 can flow into the lower chamber 120 via the first damping regulating valve 50; in the compression state, the piston rod 40 moves downward, and the fluid in the lower chamber 120 can flow into the second chamber 21 via the second damping regulating valve 60.

[0037] Through the above technical solution, when the vehicle shock absorber 1 is in a tension state, the piston rod 40 moves upward, and the fluid in the upper chamber 110 can flow into the lower chamber 120 via the first damping regulating valve 50. In the process of the fluid flowing into the lower chamber 120 via the first damping regulating valve 50, the first damping regulating valve 50 can adjust the flow rate flowing into the lower chamber 120 to achieve the purpose of adjusting the damping force of the vehicle shock absorber 1 in the tension state; when the vehicle shock absorber 1 is in a compression state, the piston rod 40 moves downward, and the fluid in the lower chamber 120 can flow into the second damping regulating valve 60 and enter the second chamber 21. At this time, the second damping regulating valve 60 can adjust the flow rate flowing into the lower chamber 120 to achieve the purpose of adjusting the damping force of the vehicle shock absorber 1 in the compression state, thereby realizing independent adjustment of the damping in the tension state and the compression state.

[0038] Furthermore, since the first damping regulating valve 50 is disposed inside the first cylinder body 10 , it will not occupy too much space around the vehicle shock absorber 1 , making it easier to install and arrange the vehicle shock absorber 1 .

[0039] Optionally, in order to facilitate the flow of fluid from the lower chamber 120 into the inlet of the second damping regulating valve 60, in an embodiment provided by the present disclosure, as Figure 1 , Figure 2 and Figure 4 As shown, the vehicle shock absorber 1 can also include a third cylinder body 30, which has a third chamber 31. The third cylinder body 30 is located in the second cylinder body 20 and is mounted outside the first cylinder body 10. A first flow channel 12 is formed on the first cylinder body 10. The first flow channel 12 connects the lower chamber 120 with the third chamber 31, and the inlet of the second damping regulating valve 60 is connected to the third chamber 31.

[0040] Thus, when the vehicle shock absorber 1 is in a compressed state, Figure 2 and Figure 4 As shown, the fluid in the lower chamber 120 flows into the third chamber 31 through the first flow channel 12 on the first cylinder body 10 under the push of the piston rod 40. Since the inlet of the second damping regulating valve 60 is connected to the third chamber 31, the fluid flowing into the third chamber 31 can enter the interior of the second damping regulating valve 60 through the inlet of the second damping regulating valve 60, and flow into the second chamber 21 from the outlet of the second damping regulating valve 60. In the process that the fluid in the lower chamber 120 can flow into the second chamber 21 via the first flow channel 12, the third chamber 31, and the second damping regulating valve 60, the second damping regulating valve 60 can adjust the flow rate flowing into the second chamber 21 to achieve the purpose of adjusting the damping force.

[0041] When the vehicle shock absorber 1 is in a stretched state, Figure 1 and Figure 4 As shown, the fluid in the third chamber 31 can flow into the lower chamber 120 via the first flow channel 12 to achieve fluid reflux.

[0042] In the second embodiment provided by the present disclosure, the second damping regulating valve 60 may be connected to the first flow channel 12 through a connecting pipe, and specifically, one end of the connecting pipe may be connected to the piston rod 40 at the outlet of the first flow channel 12. Of course, the inlet of the second damping regulating valve 60 may also be the piston rod 40 directly connected to the lower chamber 120, as long as the inlet of the second damping regulating valve 60 can be connected to the lower chamber 120, and the present disclosure does not limit this.

[0043] Optionally, in order to prevent the fluid in the second chamber 21 from flowing back into the second damping regulating valve 60 and returning to the lower chamber 120 via the second damping regulating valve 60 in the stretched state, so that the second damping regulating valve 60 participates in the damping regulation in the stretched state, in the present disclosure, Figure 1-Figure 2 , Figure 4As shown, a second flow channel 13 may also be formed on the first cylinder body 10, and the first end of the second flow channel 13 is communicated with the lower chamber 120, and the second end of the second flow channel 13 is communicated with the second chamber 21. In this way, when the vehicle shock absorber 1 is in a compressed state, the fluid in the lower chamber 120 flows into the inlet of the second damping regulating valve 60 through the first flow channel 12 on the first cylinder body 10 under the push of the piston rod 40, and flows into the second chamber 21 from the outlet of the second damping regulating valve 60. When the vehicle shock absorber 1 is in a stretched state, the piston rod 40 drives the piston 42 and the first damping regulating valve 50 to move upward. At this time, the volume in the lower chamber 120 increases and the pressure decreases. Under the action of the pressure difference, the fluid flowing into the second chamber 21 when the vehicle shock absorber 1 is in a compressed state can flow back to the lower chamber 120 through the second flow channel 13, realizing the reflux of the fluid and preventing the fluid in the second chamber 21 from flowing back into the second damping regulating valve 60.

[0044] In an embodiment where the vehicle shock absorber 1 also includes a third cylinder 30, the fluid located in the third chamber 31 will also flow back to the lower chamber 120 through the first flow channel 12 under the action of the pressure difference. That is to say, in the stretched state, the fluid located in the second chamber 21 and the third chamber 31 will flow back to the lower chamber 120 through the first flow channel 12 and the second flow channel 13 respectively, thereby realizing the reflux of the fluid. In this state, no fluid enters the second damping regulating valve 60. At this time, the first damping regulating valve 50 independently adjusts the damping force of the vehicle shock absorber 1 in the stretched state.

[0045] In the present disclosure, the second flow channel 13 can be formed at any position of the first cylinder body 10. For example, in an embodiment provided in the present disclosure, Figure 1-Figure 2 As shown, the second flow channel 13 can be formed at the bottom of the first cylinder 10. For the embodiment in which the vehicle shock absorber 1 further includes a third cylinder 30, and the third cylinder 30 is located in the second cylinder 20 and sleeved outside the first cylinder 10, the bottom of the third cylinder 30 should have an opening for exposing the bottom of the first cylinder 10, or a flow channel, a through hole or the like is formed on the third chamber 31 to prevent the third cylinder 30 from affecting the second flow channel 13 connecting the lower chamber 120 and the second chamber 21.

[0046] Optionally, in order to prevent the fluid in the lower chamber 120 from flowing into the second chamber 21 via the second flow channel 13 when the vehicle shock absorber 1 is in a compressed state, thereby affecting the fluid in the lower chamber 120 from flowing into the second damping regulating valve 60, in the present disclosure, Figure 1-Figure 2 , Figure 4As shown, the vehicle shock absorber 1 may further include a first valve component 70. In the stretched state, the first valve component 70 can allow the fluid in the second chamber 21 to flow into the lower chamber 120. In the compressed state, the first valve component 70 can prevent the fluid in the lower chamber 120 from flowing into the second chamber 21. In this way, when the vehicle shock absorber 1 is in the compressed state, since the first valve component 70 can prevent the fluid in the lower chamber 120 from flowing into the second chamber 21, that is, at this time, the fluid in the lower chamber 120 can only flow into the second chamber 21 through the inlet of the second damping regulating valve 60 and flow out from the outlet of the second damping regulating valve 60, but cannot directly enter the second chamber 21 from the second flow channel 13, thereby preventing the fluid from performing damping adjustment without passing through the second damping regulating valve 60; when the vehicle shock absorber 1 is in the stretched state, In the stretched state, the volume in the lower chamber 120 increases and the pressure decreases. The first valve component 70 can allow the fluid in the second chamber 21 to flow into the lower chamber 120. Under the action of the pressure difference, the fluid in the second chamber 21 can flow back to the lower chamber 120 through the second flow channel 13, thereby realizing the reflux and circulation of the fluid. In addition, since the fluid in the second chamber 21 flows back to the lower chamber 120, it can also be avoided that the fluid in the second chamber 21 flows back to the second damping regulating valve 60 during the stretching state.

[0047] Optionally, in one embodiment provided by the present disclosure, as Figure 4 As shown, the first valve component 70 may include a first mounting shaft 71 and a first elastic baffle 72 fixed on the first mounting shaft 71, the first mounting shaft 71 is mounted on the first cylinder body 10, the first elastic baffle 72 is located in the lower chamber 120, and the first elastic baffle 72 can cover or expose the first end of the second flow channel 13; in the stretched state, the fluid pressure in the second chamber 21 is greater than the fluid pressure in the lower chamber 120, the fluid in the second chamber 21 flows into the second flow channel 13 and pushes the first elastic baffle 72 to deform to expose the first end of the second flow channel 13, and in the compressed state, the fluid pressure in the lower chamber 120 is greater than the fluid pressure in the second chamber 21, and the first elastic baffle 72 adheres to the inner surface of the first cylinder body 10 and covers the first end of the second flow channel 13 under the action of the fluid pressure in the lower chamber 120.

[0048] Specifically, in the stretched state, the volume in the lower chamber 120 increases and the pressure decreases. The fluid in the second chamber 21 flows into the second flow channel 13 under the action of the pressure difference and acts on the first elastic baffle 72, so that the first elastic baffle 72 is deformed under the pressure of the fluid in the second flow channel 13, thereby exposing the first end of the second flow channel 13, and allowing the fluid to enter the lower chamber 120; in the compressed state, the volume in the lower chamber 120 decreases and the pressure increases. The fluid in the lower chamber 120 is pressed on the first elastic baffle 72. At this time, the first elastic baffle 72 recovers its deformation under the pressure of the fluid in the lower chamber 120 and its own elastic force. The first elastic baffle 72 is in contact with the inner surface of the first cylinder body 10 and covers the first end of the second flow channel 13. At this time, the fluid in the lower chamber 120 cannot enter the second chamber 2 through the second flow channel 13.

[0049] In other embodiments provided by the present disclosure, the first valve component 70 may be a one-way valve, which may be disposed in the second flow channel 13, or at the first end of the second flow channel 13, or at the second end of the second flow channel. When the vehicle shock absorber 1 is in a stretched state, the fluid in the second chamber 21 may flow back to the lower chamber 120 via the one-way valve, and when the vehicle shock absorber 1 is in a compressed state, the fluid in the second chamber 21 cannot flow into the lower chamber 120 via the one-way valve. Alternatively, the first valve component 70 may also be any valve body that meets the requirements, as long as when the vehicle shock absorber 1 is in a stretched state, the fluid in the second chamber 21 may flow back to the lower chamber 120 via the first valve component 70, and when the vehicle shock absorber 1 is in a compressed state, the fluid in the second chamber 21 cannot flow into the lower chamber 120 via the first valve component 70. The present disclosure does not limit the specific structure of the first valve component 70.

[0050] In the present disclosure, in order to improve the covering and restoring effects of the first elastic blocking piece 72 , the first elastic blocking piece 72 is composed of multiple pieces, and the multiple first elastic blocking pieces 72 are overlapped with each other in the up-and-down direction.

[0051] In addition, in order to enable the fluid in the lower chamber 120 to flow back into the upper chamber 110 in the compressed state, Figure 1-Figure 2 , Figure 3As shown, the piston 42 may also be formed with a third flow channel 421, which connects the upper chamber 110 with the lower chamber 120. In this way, when the vehicle shock absorber 1 is in a compressed state, a portion of the fluid in the lower chamber 120 can flow back to the upper chamber 110 through the third flow channel 421, and another portion of the fluid in the lower chamber 120 can enter the second damping regulating valve 60, thereby adjusting the damping force during the vehicle descent process. When the vehicle shock absorber 1 is in a stretched state, a portion of the fluid in the upper chamber 110 can flow into the lower chamber 120 through the third flow channel 421, and another portion of the fluid in the upper chamber 110 can flow into the lower chamber 120 through the first damping regulating valve 50, thereby adjusting the damping force during the vehicle ascent process. In other words, the third flow channel 421 can be used as a flow channel that always flows, ensuring that during the lifting and lowering of the vehicle body, the fluids in the upper chamber 110 and the lower chamber 120 can always flow through the third flow channel 421.

[0052] In addition, in the stretched state, the fluid in the upper chamber 110 flows into the lower chamber 120 via the first damping regulating valve 50, and in the compressed state, the fluid in the lower chamber 120 does not flow into the upper chamber 110 via the first damping regulating valve 50. This process can be achieved by controlling the conduction and cutoff of the first damping regulating valve 50 itself. Alternatively, it can also be achieved in other ways. For example, in an embodiment provided by the present disclosure, Figure 1-Figure 3 As shown, the vehicle shock absorber 1 may further include a second valve component 80. In a stretched state, the second valve component 80 can allow the fluid in the first damping regulating valve 50 to flow into the lower chamber 120 from the outlet of the first damping regulating valve 50. In a compressed state, the second valve component 80 can prevent the fluid in the lower chamber 120 from flowing into the first damping regulating valve 50 from the outlet of the first damping regulating valve 50.

[0053] When the vehicle shock absorber 1 is in a stretched state, the volume of the lower chamber 120 increases and the pressure decreases. At this time, the fluid in the upper chamber 110 can flow into the lower chamber 120 through the first damping regulating valve 50 and the second valve component 80 under the action of the pressure difference. In addition, in the process in which the fluid in the upper chamber 110 enters the lower chamber 120 through the first damping regulating valve 50, the damping force in the stretched state can be adjusted. When the vehicle shock absorber 1 is in a compressed state, the volume of the lower chamber 120 decreases and the pressure increases. The fluid in the lower chamber 120 will flow toward the upper chamber 110 and the second damping regulating valve 60 under the action of the pressure difference. Due to the existence of the second valve component 80, the second valve component 80 can prevent the fluid in the lower chamber 120 from flowing into the first damping regulating valve 50. That is to say, in the compressed state, the second valve component 80 can prevent the fluid in the lower chamber 120 from flowing through the first damping regulating valve 50, so that the second damping regulating valve 60 can realize independent control of the damping force in the compressed state, thereby achieving a better shock absorption effect.

[0054] Optionally, the first damping regulating valve 50 can be connected between the rod body 41 and the piston 42, a fourth flow channel 422 is formed on the piston 42, a first end of the fourth flow channel 422 is communicated with the outlet of the first damping regulating valve 50, a second end of the fourth flow channel 422 is communicated with the lower chamber 120, and the second valve component 80 can be installed on the piston 42. Since the second valve component 80 is installed on the piston 42, and the fourth flow channel 422 communicating with the outlet of the first damping regulating valve 50 is formed on the piston 42, when assembling the first damping regulating valve 50 and the piston 42, the fourth flow channel 422 can be first opened on the piston 42, and the first damping regulating valve 50 can be installed on the piston 42, and then the first damping regulating valve 50 can be installed on the piston 42, and the outlet of the first damping regulating valve 50 can be aligned with the first end of the fourth flow channel 422. That is to say, there is no need to process or modify the first damping regulating valve 50 in order to adapt to the installation of the second valve component 80 , which reduces the manufacturing cost and makes it easier to install the second valve component 80 .

[0055] The second valve component 80 may have any suitable position. In one embodiment provided by the present disclosure, the second valve component 80 may be installed at the first end of the fourth flow channel 422, that is, the second valve component 80 covers the first end of the fourth flow channel 422. In another embodiment provided by the present disclosure, as Figure 3 As shown, the second valve component 80 may also be installed at the second end of the fourth flow channel 422 , that is, the second valve component 80 covers the second end of the fourth flow channel 422 .

[0056] Of course, the second valve component 80 can also be directly installed on the first damping regulating valve 50, that is, the second valve component 80 covers the outlet of the first damping regulating valve 50, so that the inflow and outflow of the fluid in the lower chamber 120 can also be controlled. In short, the present disclosure does not limit the installation position of the second valve component 80, as long as it can be achieved that in the stretched state, the second valve component 80 can allow the fluid in the upper chamber 110 to flow through the first damping regulating valve 50 and flow into the lower chamber 120, and in the compressed state, the second valve component 80 can prevent the fluid in the lower chamber 120 from flowing into the first damping regulating valve 50 from the outlet of the first damping regulating valve 50.

[0057] The second valve component 80 may have any suitable structure. Figure 3 As shown, the second valve component 80 may include a second mounting shaft 81 and a second elastic baffle 82 fixed on the second mounting shaft 81, the second mounting shaft 81 is mounted on the piston 42, the second elastic baffle 82 is located in the lower chamber 120, and the second elastic baffle 82 can cover or expose the second end of the fourth flow channel 422; in the stretched state, the fluid pressure in the upper chamber 110 is greater than the fluid pressure in the lower chamber 120, the fluid in the upper chamber 110 flows into the first damping regulating valve 50 and the fourth flow channel 422 in sequence and pushes the second elastic baffle 82 to deform to expose the second end of the fourth flow channel 422, in the compressed state, the fluid pressure in the lower chamber 120 is greater than the fluid pressure in the upper chamber 110, the second elastic baffle 82 is attached to the piston 42 under the action of the fluid pressure in the lower chamber 120 and covers the second end of the fourth flow channel 422, and the fluid in the lower chamber 120 cannot enter the upper chamber 110 through the fourth flow channel 422 and the first damping regulating valve 50.

[0058] Specifically, in the stretched state, due to the upward movement of the piston rod 40, the volume of the upper chamber 110 decreases and the pressure increases, while the volume of the lower chamber 120 increases and the pressure decreases. The fluid in the upper chamber 110 flows into the first damping regulating valve 50 and the fourth flow channel 422 in sequence and acts on the second elastic baffle 82, causing the second elastic baffle 82 to deform to expose the second end of the fourth flow channel 422, so that the fluid in the upper chamber 110 can flow into the lower chamber 120 via the first damping regulating valve 60. In the compressed state, the piston rod 40 moves downward, the volume of the lower chamber 120 decreases and the pressure increases, the volume of the upper chamber 110 increases and the pressure decreases, and the fluid in the lower chamber 120 is pressed on the second elastic baffle 82, so that the second elastic baffle 82 recovers its deformation under the action of the fluid pressure and its own elastic force, thereby fitting with the piston 42 and covering the second end of the fourth flow channel 422, thereby preventing the fluid in the lower chamber 120 from entering the upper chamber 110 via the fourth flow channel 422 and the first damping regulating valve 50.

[0059] In the present disclosure, in order to improve the covering and restoring effects of the second elastic blocking piece 82 , the second elastic blocking piece 82 is composed of multiple pieces, and the multiple second elastic blocking pieces 82 are overlapped with each other in the up-and-down direction.

[0060] In other embodiments provided by the present disclosure, the second valve component 80 may be a one-way valve, which may be disposed in the fourth flow channel 422, or at the first end of the fourth flow channel 422, or at the second end of the fourth flow channel 422. When the vehicle shock absorber 1 is in a stretched state, the one-way valve can allow the fluid in the upper chamber 110 to flow into the lower chamber 120 through the first damping regulating valve 50, and when the vehicle shock absorber 1 is in a compressed state, the one-way valve can prevent the fluid in the lower chamber 120 from flowing from the first damping regulating valve 50 into the first damping regulating valve 50. In short, the first valve component 70 may be any valve body, as long as it can be achieved that in a stretched state, the second valve component 80 can allow the fluid in the first damping regulating valve 50 to flow from the outlet of the first damping regulating valve 50 into the lower chamber 120, and in a compressed state, the second valve component 80 can prevent the fluid in the lower chamber 120 from flowing from the outlet of the first damping regulating valve 50 into the first damping regulating valve 50.

[0061] For ease of understanding, the following will combine Figure 1-Figure 4 The illustrated embodiment describes in detail the working process of the vehicle shock absorber 1 provided by the present disclosure.

[0062] When the vehicle shock absorber 1 is in a stretched state, Figure 1 , Figure 3 as well as Figure 4As shown, the piston rod 40 moves upward, the volume of the upper chamber 110 decreases and the pressure increases, and the volume of the lower chamber 120 increases and the pressure decreases. Under the action of the pressure difference, a part of the fluid in the upper chamber 110 flows into the lower chamber 120 through the third flow channel 421, and another part of the fluid in the upper chamber 110 flows into the first damping regulating valve 50 and the fourth flow channel 422 in turn and acts on the second elastic baffle 82, so that the second elastic baffle 82 is deformed to expose the second end of the fourth flow channel 422, so that the fluid in the upper chamber 110 can flow into the lower chamber 120 via the first damping regulating valve 60. At the same time, due to the increase in volume and decrease in pressure of the lower chamber 120, the fluid in the second chamber 21 flows into the second channel 13 under the action of the pressure difference and pushes the first elastic baffle 72 to deform to expose the first end of the second channel 13, and the fluid in the second chamber 21 flows back to the lower chamber 120. Under the action of the pressure difference, the fluid in the third chamber 31 flows back to the lower chamber 120 through the first channel 12. Since the fluids in the second chamber 21 and the third chamber 31 flow back to the lower chamber 120, no fluid flows through the second damping regulating valve 60. In this process, the first damping regulating valve 50 achieves independent adjustment of the damping force in the tensile state by changing the flow rate of the fluid flowing into the first damping regulating valve 50.

[0063] When the vehicle shock absorber 1 is in a compressed state, Figure 2 , Figure 3 as well as Figure 4 As shown, the piston rod 40 moves downward, the volume of the lower chamber 120 decreases and the pressure increases, the volume of the upper chamber 110 increases and the pressure decreases. Under the action of the pressure difference, a part of the fluid in the lower chamber 120 flows into the upper chamber 110 through the third flow channel 421. Due to the presence of the first valve component 70 and the second valve component 80, the fluid in the upper chamber 110 cannot flow into the second chamber 21 and the first damping regulating valve 50. In other words, the first damping regulating valve 50 does not adjust the damping force at this time. Since the volume of the lower chamber 120 increases and the pressure decreases, a part of the fluid in the lower chamber 120 will flow into the first flow channel 12, the third chamber 31, and the inlet of the second damping regulating valve 60 in turn, and flow into the second chamber 21 through the outlet of the second damping valve. In this process, since there is no fluid flowing into the first damping regulating valve 50, the second damping regulating valve 60 can achieve independent adjustment of the damping force under compression by changing the flow rate of the fluid flowing into the second damping regulating valve 60.

[0064] According to a second aspect of the present disclosure, a vehicle is provided, comprising the above vehicle shock absorber 1. The vehicle has all the technical effects of the vehicle shock absorber 1, which will not be described in detail here.

[0065] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0066] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0067] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A vehicle shock absorber, characterized in that: include: A first cylinder (10); the first cylinder (10) has a first chamber (11) therein, and the first chamber (11) is filled with a fluid; A second cylinder body (20) is sleeved outside the first cylinder body (10), and the second cylinder body (20) has a second chamber (21); a piston rod (40) inserted into the first cylinder body (10) so as to be movable up and down, the piston rod (40) comprising a rod body (41) and a piston (42), the piston (42) being located in the first chamber (11) and dividing the first chamber (11) into an upper chamber (110) and a lower chamber (120); a first damping regulating valve (50) located in the first chamber (11) and fixed on the piston rod (40), wherein the inlet of the first damping regulating valve (50) is in communication with the upper chamber (110), and the outlet of the first damping regulating valve (50) is in communication with the lower chamber (120); a second damping regulating valve (60) mounted on the second cylinder body (20) and at least partially located outside the second cylinder body (20), the inlet of the second damping regulating valve (60) being in communication with the lower chamber (120), and the outlet of the second damping regulating valve (60) being in communication with the second chamber (21); The vehicle shock absorber (1) has a tension state and a compression state. In the tension state, the piston rod (40) moves upward, and the fluid in the upper chamber (110) can flow into the lower chamber (120) via the first damping regulating valve (50); in the compression state, the piston rod (40) moves downward, and the fluid in the lower chamber (120) can flow into the second chamber (21) via the second damping regulating valve (60); A second flow channel (13) is also formed on the first cylinder body (10), a first end of the second flow channel (13) is in communication with the lower chamber (120), and a second end of the second flow channel (13) is in communication with the second chamber (21); The vehicle shock absorber (1) further comprises a first valve component (70), wherein in the stretched state, the first valve component (70) is capable of allowing the fluid in the second chamber (21) to flow into the lower chamber (120), and in the compressed state, the first valve component (70) is capable of preventing the fluid in the lower chamber (120) from flowing into the second chamber (21); From top to bottom, the cross-sectional area of ​​the second flow channel (13) gradually increases.

2. The vehicle shock absorber according to claim 1, characterized in that: The vehicle shock absorber (1) further comprises a third cylinder (30), wherein the third cylinder (30) has a third chamber (31), the third cylinder (30) is located in the second cylinder (20) and is sleeved outside the first cylinder (10), a first flow channel (12) is formed on the first cylinder (10), the first flow channel (12) connects the lower chamber (120) and the third chamber (31), and an inlet of the second damping regulating valve (60) is connected to the third chamber (31).

3. The vehicle shock absorber according to claim 1, characterized in that: The first valve component (70) comprises a first mounting shaft (71) and a first elastic baffle (72) fixed on the first mounting shaft (71), the first mounting shaft (71) being mounted on the first cylinder body (10), the first elastic baffle (72) being located in the lower chamber (120), and the first elastic baffle (72) being capable of covering or exposing a first end of the second flow channel (13); In the stretched state, the fluid pressure in the second chamber (21) is greater than the fluid pressure in the lower chamber (120), the fluid in the second chamber (21) flows into the second flow channel (13) and pushes the first elastic baffle (72) to deform, so as to expose the first end of the second flow channel (13), and in the compressed state, the fluid pressure in the lower chamber (120) is greater than the fluid pressure in the second chamber (21), and the first elastic baffle (72) is in contact with the inner surface of the first cylinder body (10) and covers the first end of the second flow channel (13) under the action of the fluid pressure in the lower chamber (120).

4. The vehicle shock absorber according to claim 1, characterized in that: A third flow channel (421) is formed on the piston (42), and the third flow channel (421) communicates with the upper chamber (110) and the lower chamber (120).

5. The vehicle shock absorber according to claim 1 or 4, characterized in that: The vehicle shock absorber (1) further comprises a second valve component (80), wherein in the stretched state, the second valve component (80) is capable of allowing the fluid in the first damping regulating valve (50) to flow from the outlet of the first damping regulating valve (50) into the lower chamber (120), and in the compressed state, the second valve component (80) is capable of preventing the fluid in the lower chamber (120) from flowing from the outlet of the first damping regulating valve (50) into the first damping regulating valve (50).

6. The vehicle shock absorber according to claim 5, characterized in that: The first damping regulating valve (50) is connected between the rod body (41) and the piston (42); a fourth flow channel (422) is formed on the piston (42); a first end of the fourth flow channel (422) is communicated with an outlet of the first damping regulating valve (50); a second end of the fourth flow channel (422) is communicated with the lower chamber (120); and the second valve component (80) is mounted on the piston (42).

7. The vehicle shock absorber according to claim 6, characterized in that: The second valve component (80) comprises a second mounting shaft (81) and a second elastic blocking piece (82) fixed on the second mounting shaft (81), the second mounting shaft (81) being mounted on the piston (42), the second elastic blocking piece (82) being located in the lower chamber (120), and the second elastic blocking piece (82) being capable of covering or exposing the second end of the fourth flow channel (422); In the stretched state, the fluid pressure in the upper chamber (110) is greater than the fluid pressure in the lower chamber (120), and the fluid in the upper chamber (110) flows into the first damping regulating valve (50) and the fourth flow channel (422) in sequence and pushes the second elastic baffle (82) to deform so as to expose the second end of the fourth flow channel (422). In the compressed state, the fluid pressure in the lower chamber (120) is greater than the fluid pressure in the upper chamber (110), and the second elastic baffle (82) is in contact with the piston (42) and covers the second end of the fourth flow channel (422) under the action of the fluid pressure in the lower chamber (120).

8. A vehicle, characterized in that: The vehicle shock absorber comprises the vehicle shock absorber as claimed in any one of claims 1 to 7.

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