Shock absorbers, suspension systems and vehicles

Abstract

The present invention belongs to the technical field of vehicle suspension, and relates to a shock absorber, a suspension system and a vehicle. The shock absorber comprises an external valve and a cooling device, wherein the cooling device is mounted on the external valve, and the cooling device is used to dissipate heat for the external valve. The shock absorber can dissipate heat for the external valve.

Description

Technical Field

[0001] The present invention belongs to the technical field of vehicle suspension systems, and in particular relates to a shock absorber, a suspension system and a vehicle. Background Art

[0002] Existing magnetorheological fluid shock absorbers generally include a cylinder and an external valve. The cylinder is provided with a first liquid flow channel, and the external valve is provided with a second liquid flow channel connected to the first liquid flow channel. The external valve uses the damping force of the magnetic field to change the viscosity of the magnetorheological fluid to achieve the purpose of shock absorption.

[0003] However, existing magnetorheological fluid dampers generally have the problem of low heat dissipation efficiency. Summary of the invention

[0004] The technical problem to be solved by the present invention is: to provide a shock absorber, a suspension system and a vehicle in view of the technical problem that the existing magnetorheological fluid shock absorber has low heat dissipation efficiency.

[0005] In order to solve the above technical problems, on the one hand, an embodiment of the present invention provides a shock absorber, including an external valve and a cooling device, wherein the cooling device is installed on the external valve and is used to cool the external valve.

[0006] According to the shock absorber of the embodiment of the present invention, the cooling device is installed on the external valve, and the heat generated by the external valve is dissipated into the air through the cooling device and is carried away by the airflow, so that the cooling device can dissipate heat for the external valve and improve the heat dissipation efficiency of the external valve.

[0007] Optionally, the cooling device is sleeved on the external valve.

[0008] Optionally, the cooling device includes an inner cooling plate, an outer cooling plate and a core plate, the inner cooling plate, the outer cooling plate and the core plate are all annular, the inner cooling plate is sleeved on the external valve, the outer cooling plate is sleeved on the inner cooling plate, the core plate is arranged between the inner cooling plate and the outer cooling plate, and a plurality of air ducts are arranged on the core plate.

[0009] Optionally, the inner cooling plate is arranged coaxially with the core plate and the outer cooling plate.

[0010] Optionally, the air duct has a honeycomb-shaped cross-section along the radial direction of the core plate.

[0011] Optionally, a plurality of the air ducts are provided, and the plurality of air ducts are spaced apart along the circumference of the core plate.

[0012] Optionally, a plurality of air duct groups are arranged on the core plate, and the plurality of air duct groups are sequentially arranged on the core plate along the radial direction of the core plate, and each of the air duct groups includes a plurality of the air ducts.

[0013] Optionally, the plurality of air ducts in the same air duct group are arranged at intervals along the circumference of the core plate.

[0014] Optionally, the shock absorber further comprises a cylinder, the cylinder is provided with a working chamber, an intermediate chamber and an oil storage chamber, the working chamber comprises a restoring chamber and a compression chamber, the compression chamber is communicated with the intermediate chamber, and the restoring chamber can be communicated with the oil storage chamber;

[0015] The external valve is installed on the cylinder body. The external valve is arranged by a plurality of valve body units at intervals. Each of the valve body units is provided with a liquid flow channel, and the liquid flow channel is connected between the intermediate cavity and the oil storage cavity.

[0016] Optionally, the valve body unit comprises a valve core, a valve housing, a magnetic conductive block and a coil, the valve housing is mounted on the cylinder, the valve core is mounted on the valve housing, and an annular channel is formed between the valve core and the valve housing;

[0017] The valve core is provided with a first valve hole and a second valve hole, and the second valve hole is connected between the first valve hole and the annular channel to form the liquid flow channel;

[0018] The first valve hole is in communication with the intermediate cavity, and the annular channel is in communication with the oil storage cavity;

[0019] The magnetic conductive block is sleeved on the valve core, and the magnetic conductive block is located on a side of the second valve hole close to the middle cavity; the coil is sleeved on the magnetic conductive block;

[0020] The valve core is tubular, the first valve hole extends along the axial direction of the valve core, and the second valve hole extends along the radial direction of the valve core.

[0021] Optionally, the external valve further includes a magnetic isolation member, and two adjacent valve body units are magnetically isolated by the magnetic isolation member.

[0022] Optionally, the cooling device includes a magnetic isolation plate, which is arranged between the external valve and the internal cooling plate, and the magnetic isolation plate is used to magnetically isolate the external valve from the internal cooling plate.

[0023] On the other hand, an embodiment of the present invention provides a suspension system, which includes the above-mentioned shock absorber.

[0024] On the other hand, an embodiment of the present invention provides a vehicle, which includes the above-mentioned shock absorber or the above-mentioned suspension system. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic diagram of a shock absorber provided by an embodiment of the present invention;

[0026] Figure 2 yes Figure 1 A cross-sectional view of the cooling device;

[0027] Figure 3 yes Figure 1 Schematic diagram of the external valve.

[0028] The reference numerals in the specification are as follows:

[0029] 1. Cylinder; 101. Working chamber; 1011. Restoration chamber; 1012. Compression chamber; 102. Intermediate chamber; 11. Piston rod; 12. Working cylinder barrel; 13. Outer cylinder barrel; 131. Main body; 132. Mounting sleeve; 14. Piston assembly; 15. Bottom valve assembly; 16. Guide;

[0030] 2. External valve; 20. Liquid flow channel; 21. Valve body unit; 211. Valve core; 2111. First valve hole; 2112. Second valve hole; 212. Valve housing; 213. Magnetic guide block; 214. Coil; 210. Annular channel; 22. Magnetic isolation member;

[0031] 3. Cooling device; 31. Inner cooling plate; 32. Outer cooling plate; 33. Core plate; 330. Air duct group; 331. Air duct; 34. Magnetic isolation plate. DETAILED DESCRIPTION

[0032] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0033] like Figures 1 to 3 As shown, the shock absorber provided by the embodiment of the present invention includes a cylinder 1, an external valve 2 and a cooling device 3. The cooling device 3 is installed on the external valve 2 and is used to cool the external valve 2.

[0034] The shock absorber provided in the embodiment of the present invention has the cooling device 3 installed on the external valve 2, and the heat generated by the external valve 2 is dissipated into the air through the cooling device 3 and carried away by the airflow, so that the cooling device 3 can dissipate heat for the external valve 2 and improve the heat dissipation efficiency of the external valve 2.

[0035] In one embodiment, if Figure 1 As shown, the cooling device 3 is sleeved on the external valve 2 to achieve heat dissipation of the external valve 2.

[0036] In one embodiment, if Figure 2As shown, the cooling device 3 includes an inner cooling plate 31, an outer cooling plate 32 and a core plate 33. The inner cooling plate 31, the outer cooling plate 32 and the core plate 33 are all ring-shaped. The inner cooling plate 31 is sleeved on the external valve 2, the outer cooling plate 32 is sleeved on the inner cooling plate 31, the core plate 33 is arranged between the inner cooling plate 31 and the outer cooling plate 32, and a plurality of air ducts 331 are arranged on the core plate 33.

[0037] By filling air into the air duct 331 , the heat transferred from the external valve 2 to the cooling device 3 can be taken away from the cooling device 3 , thereby achieving heat dissipation of the external valve 2 .

[0038] In one embodiment, if Figure 2 As shown, the inner cooling plate 31 is coaxially arranged with the core plate 33 and the outer cooling plate 32 , and the cross section of the air duct 331 along the radial direction of the core plate 33 is honeycomb-shaped.

[0039] By setting the radial cross-section of the air duct 331 along the core plate 33 to be honeycomb-shaped, the convection heat dissipation area between the air and the core plate 33 can be effectively increased, which helps to dissipate the heat generated by the external valve 2.

[0040] In one embodiment, if Figure 2 As shown, there are multiple air ducts, and the multiple air ducts 331 are evenly spaced along the circumference of the core plate 33, so that the air ducts 331 are evenly distributed inside the cooling device 3, which greatly increases the contact area with the air. When the cold air in the air flows through the air duct 331, it will take away the heat generated by the external valve 2, so that the heat is dissipated into the air and carried away by the airflow, thereby efficiently realizing the cooling of the external valve 2.

[0041] In one embodiment, the cooling device 3 is a passive air-cooled heat dissipation mode, does not require additional active heat dissipation components, has few working parts and a simple structure. In addition, the cooling device 3 occupies a small space and can adapt to the high-power and high-volume working conditions required by the vehicle. In addition, the core plate 33 of the cooling device 3 can adopt a honeycomb plate structure, which has a simple preparation process, light weight, and low cost, and can also improve the cooling effect of the external valve 2 as well as the reliability and stability of operation.

[0042] In one embodiment, if Figure 2 As shown, a plurality of air duct groups 330 are arranged on the core plate 33, and the plurality of air duct groups 330 are arranged in sequence on the core plate 33 along the radial direction of the core plate 33, and each of the air duct groups 330 includes a plurality of the air ducts 331, so that more air ducts 331 are arranged to improve the cooling effect of the external valve 2.

[0043] In one embodiment, if Figure 2 As shown, the multiple air ducts 331 in the same air duct group 330 are arranged in a ring shape, and the multiple air ducts 331 in the same air duct group 330 are arranged at equal intervals along the circumference of the core plate 33 to form the corresponding core plate 33 to achieve cooling of the external valve 2.

[0044] In other embodiments, the cooling device may also adopt an active air cooling mode. In this case, an additional blowing component may be provided. The blowing component may include a fan and an air duct. The airflow at the fan is transported to the air duct through the air duct to achieve active air cooling.

[0045] Alternatively, the cooling device may also adopt a liquid cooling mode. In this case, the cooling device may include a liquid cooling plate having a liquid cooling channel. The liquid cooling plate is attached to the external valve. The heat transferred from the external valve to the liquid cooling plate is removed by the flow of coolant in the liquid cooling channel, thereby cooling the external valve.

[0046] In one embodiment, if Figures 1 to 3 As shown, the shock absorber also includes a cylinder 1, which is provided with a working chamber 101, an intermediate chamber 102 and an oil storage chamber. The working chamber 101 includes a recovery chamber 1011 and a compression chamber 1012. The compression chamber 1012 is connected to the intermediate chamber 102. The cylinder 1 is provided with a recovery state and a compression state.

[0047] In the restoring state, the restoring chamber 1011 is isolated from the compression chamber 1012, and the restoring chamber 1011 is connected to the oil storage chamber. In the compression state, the restoring chamber 1011 is connected to the compression chamber 1012, and the restoring chamber 1011 is isolated from the oil storage chamber.

[0048] The external valve 2 is mounted on the cylinder 1, and a liquid flow channel 20 is provided on the external valve 2, and the liquid flow channel 20 is connected between the intermediate cavity 102 and the oil storage cavity. When the external valve 2 is opened, the intermediate cavity 102 and the oil storage cavity are connected through the liquid flow channel 20; when the external valve 2 is closed, the intermediate cavity 102 and the oil storage cavity are isolated at the liquid flow channel 20.

[0049] The cooling device 3 is installed on the external valve 2 , and the cooling device 3 is used to dissipate heat and cool the external valve 2 .

[0050] In one embodiment, if Figure 3 As shown, the external valve 2 includes a valve body unit 21 , and the valve body unit 21 is provided with the liquid flow channel 20 .

[0051] Furthermore, the valve body unit 21 includes a valve core 211, a valve housing 212, a magnetic conductive block 213 and a coil 214. The valve housing 212 is installed on the cylinder 1, the valve core 211 is installed on the valve housing 212, and an annular channel 210 is formed between the valve core 211 and the valve housing 212.

[0052] The valve core 211 is provided with a first valve hole 2111 and a second valve hole 2112 . The second valve hole 2112 is connected between the first valve hole 2111 and the annular channel 210 to form the liquid flow channel 20 .

[0053] The first valve hole 2111 is in communication with the middle cavity 102 , and the annular channel 210 is in communication with the oil storage cavity.

[0054] The magnetic conductive block 213 is sleeved on the valve core 211, and the magnetic conductive block 213 is located on the side of the second valve hole 2112 close to the middle cavity 102. The coil 214 is sleeved on the magnetic conductive block 213 to realize the assembly of the various structures of the valve body unit 21. Further, when the coil 214 is turned on, the magnetic conductive block 213 will move away from the second valve hole 2112 under the action of electromagnetic force, so that the first valve hole 2111 and the annular channel 210 are connected through the second valve hole 2112; when the coil 214 is powered off, the magnetic conductive block 213 will move close to the second valve hole 2112 under the action of electromagnetic force, and can block the second valve hole 2112, so that the first valve hole 2111 and the annular channel 210 are isolated at the second valve hole 2112.

[0055] In one embodiment, if Figure 3 As shown, the valve core 211 is tubular, the first valve hole 2111 extends along the axial direction of the valve core 211 , and the second valve hole 2112 extends along the radial direction of the valve core 211 , forming a structure corresponding to the valve core 211 .

[0056] In one embodiment, if Figure 3 As shown, the valve body units 21 are provided in plurality, the external valve 2 is arranged by intervals of the plurality of valve body units 21, each of the valve body units 21 is provided with the liquid flow channel 20, and the first valve hole 2111 of each of the valve body units 21 is connected to the intermediate cavity 102, and the annular channel 210 of each of the valve body units 21 is connected to the oil storage cavity.

[0057] Each of the valve body units 21 achieves a different damping force range by adjusting different excitation currents. Therefore, by providing a plurality of the valve body units 21, the controllable damping adjustment range of the external valve 2 can be increased, and the external valve 2 can be applied in different fields under the conditions of meeting basic strength and rigidity, and has strong versatility. At the same time, the composite external valve 2 can greatly save layout space.

[0058] like Figure 3 In the illustrated embodiment, two valve body units 21 are provided, and the two valve body units 21 are arranged in parallel.

[0059] In one embodiment, if Figure 3 As shown, the external valve 2 further includes a magnetic isolation member 22 , and two adjacent valve body units 21 are magnetically isolated by the magnetic isolation member 22 to avoid mutual interference between the valve body units 21 .

[0060] In one embodiment, if Figure 2 As shown, the cooling device 3 includes a magnetic isolation plate 34, which is arranged between the external valve 2 and the internal cooling plate 31, and is used to magnetically isolate the external valve 2 from the internal cooling plate 31. The magnetic isolation plate 34 is made of magnetic isolation material to prevent magnetic loss inside the external valve 2.

[0061] In one embodiment, if Figure 1 As shown, the cylinder body 1 includes a working cylinder 12, an outer cylinder 13 and an oil storage cylinder, and the shock absorber also includes a piston rod 11, a piston assembly 14 and a bottom valve assembly 15. The working cylinder 12 is provided with the working chamber 101 and a through hole. The piston assembly 14 is slidably connected in the working chamber 101 and divides the working chamber 101 into the recovery chamber 1011 and the compression chamber 1012. The compression chamber 1012 is connected to the intermediate chamber 102 through the through hole.

[0062] In the restoring state, the piston assembly 14 slides relative to the working chamber 101, and the volume of the restoring chamber 1011 gradually becomes larger than the volume of the compression chamber 1012. In the compression state, the piston assembly 14 slides relative to the working chamber 101, and the volume of the compression chamber 1012 gradually becomes larger than the volume of the restoring chamber 1011.

[0063] One end of the piston rod 11 passes through the first end of the working cylinder 12 and the compression chamber 1012 , and is connected to the piston assembly 14 .

[0064] The outer cylinder 13 is sleeved on the working cylinder 12, and the intermediate cavity 102 is formed between the outer cylinder 13 and the working cylinder 12. The oil storage cylinder is sleeved on the outer cylinder 13, and the oil storage cavity is formed between the oil storage cylinder and the outer cylinder 13.

[0065] The bottom valve assembly 15 is installed at the second end of the working cylinder 12 , and the recovery chamber 1011 can be communicated with the oil storage chamber through the bottom valve assembly 15 .

[0066] The intermediate chamber 102 , the recovery chamber 1011 in the working chamber 101 , and the compression chamber 1012 are all filled with magnetorheological fluid.

[0067] In one embodiment, a first one-way valve and a second one-way valve are provided on the piston assembly 14. When the first one-way valve is opened, the restoration chamber 1011 can be connected with the compression chamber 1012, and the liquid in the restoration chamber 1011 flows into the compression chamber 1012. When the second one-way valve is opened, the restoration chamber 1011 can be connected with the compression chamber 1012, and the liquid in the compression chamber 1012 flows into the restoration chamber 1011.

[0068] In one embodiment, a third one-way valve and a fourth one-way valve are provided on the bottom valve assembly 15. When the third one-way valve is opened, the restoration chamber 1011 can be connected with the oil storage chamber, and the liquid in the restoration chamber 1011 flows into the oil storage chamber. When the fourth one-way valve is opened, the restoration chamber 1011 can be connected with the oil storage chamber, and the liquid in the oil storage chamber flows into the restoration chamber 1011.

[0069] In one embodiment, if Figure 1 As shown, the outer cylinder 13 includes a main body 131 and a mounting sleeve 132. The main body 131 is sleeved on the working cylinder 12, and a gap is formed between the main body 131 and the working cylinder 12. The mounting sleeve 132 is mounted on the main body 131 to block the gap, thereby forming the intermediate cavity 102 between the outer cylinder 13 and the working cylinder 12.

[0070] In one embodiment, if Figure 1 As shown, the cylinder body 1 also includes a guide 16, which is installed at the first end of the working cylinder 12. One end of the piston rod 11 passes through the guide 16 and the compression chamber 1012 and is connected to the piston assembly 14, and the guide 16 is slidably matched with the piston rod 11. The guide 16 is used to provide motion guidance for the piston rod 11.

[0071] The working principle of the shock absorber provided by the embodiment of the present invention is as follows:

[0072] (1) In the normal recovery state of the cylinder 1, the piston rod 11 and the piston assembly 14 move upward, the first one-way valve, the second one-way valve and the third one-way valve are in a normally closed state, the fourth one-way valve is easy to open, and the magnetorheological fluid in the compression chamber 1012 enters the intermediate chamber 102 through the through hole at the upper end of the working cylinder barrel 12.

[0073] The magnetorheological fluid in the restoration chamber 1011 and the compression chamber 1012 does not flow directly. After the difference between the magnetorheological fluid pressure in the oil storage chamber and the magnetorheological fluid pressure in the restoration chamber 1011 reaches the critical pressure difference for opening the fourth one-way valve, the fourth one-way valve is opened appropriately, and the magnetorheological fluid in the oil storage chamber is compensated to the restoration chamber 1011 through the fourth one-way valve to make up for the insufficient volume of magnetorheological fluid in the restoration chamber 1011.

[0074] (2) In the normal compression state of the cylinder 1, the piston rod 11 and the piston assembly 14 move downward, the second one-way valve, the third one-way valve and the fourth one-way valve are in a normally closed state, the first one-way valve is opened, and the magnetorheological fluid in the recovery chamber 1011 enters the compression chamber 1012 through the circulation valve, and the magnetorheological fluid in the compression chamber 1012 enters the intermediate chamber 102 through the through hole at the upper end of the working cylinder barrel 12.

[0075] (3) In the normal compression and recovery state of the cylinder 1, the magnetorheological fluid circulates in one direction through the external valve 2 and implements viscosity control to achieve the regulation of the damping force; in the extreme working state, the second and third one-way valves implement overload protection and are opened appropriately, and the shock absorber works in the passive mode to ensure safety.

[0076] The suspension system provided by the embodiment of the present invention includes the shock absorber provided by the above embodiment.

[0077] The vehicle provided in the embodiment of the present invention includes the shock absorber provided in the above embodiment or the suspension system provided in the above embodiment.

[0078] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A shock absorber, characterized in that: It comprises an external valve (2) and a cooling device (3), wherein the cooling device (3) is installed on the external valve (2) and is used to cool the external valve (2); The external valve (2) is composed of a plurality of valve body units (21) arranged at intervals, and each of the valve body units (21) is adjusted by different excitation currents to achieve different damping force ranges; The cooling device (3) comprises an inner cooling plate (31), an outer cooling plate (32) and a core plate (33) which are separately arranged, the inner cooling plate (31), the outer cooling plate (32) and the core plate (33) are all ring-shaped, the inner cooling plate (31) is sleeved on the external valve (2), the outer cooling plate (32) is sleeved on the inner cooling plate (31), the core plate (33) is arranged between the inner cooling plate (31) and the outer cooling plate (32), and a plurality of air ducts (331) are arranged on the core plate (33); The cooling device (3) further comprises a magnetic isolation plate (34), wherein the magnetic isolation plate (34) is arranged between the external valve (2) and the internal cooling plate (31), and the magnetic isolation plate (34) is used to magnetically isolate the external valve (2) from the internal cooling plate (31).

2. The shock absorber according to claim 1, characterized in that: The cooling device (3) is sleeved on the external valve (2).

3. The shock absorber according to claim 1, characterized in that: The inner cooling plate (31), the core plate (33) and the outer cooling plate (32) are coaxially arranged.

4. The shock absorber according to claim 1, characterized in that: The cross section of the air duct (331) along the radial direction of the core plate (33) is honeycomb-shaped.

5. The vibration absorber according to claim 1, characterized in that: A plurality of the air ducts (331) are provided, and the plurality of the air ducts (331) are arranged at intervals along the circumference of the core plate (33).

6. The shock absorber according to claim 1, characterized in that A plurality of air duct groups (330) are arranged on the core plate (33); the plurality of air duct groups (330) are arranged sequentially on the core plate (33) along the radial direction of the core plate (33); and each of the air duct groups (330) comprises a plurality of air ducts (331).

7. The shock absorber according to claim 6, characterized in that The plurality of air ducts (331) within the same air duct group (330) are arranged at intervals along the circumference of the core plate (33).

8. The shock absorber according to claim 1, characterized in that The shock absorber further comprises a cylinder (1), the cylinder (1) being provided with a working chamber (101), an intermediate chamber (102) and an oil storage chamber, the working chamber (101) comprising a restoring chamber (1011) and a compression chamber (1012), the compression chamber (1012) being in communication with the intermediate chamber (102), and the restoring chamber (1011) being capable of being in communication with the oil storage chamber; The external valve (2) is mounted on the cylinder (1), and each valve body unit (21) is provided with a liquid flow channel (20), wherein the liquid flow channel (20) is connected between the intermediate cavity (102) and the oil storage cavity.

9. The vibration absorber according to claim 8, characterized in that The valve body unit (21) comprises a valve core (211), a valve housing (212), a magnetic conductive block (213) and a coil (214); the valve housing (212) is mounted on the cylinder (1); the valve core (211) is mounted on the valve housing (212); and an annular channel (210) is formed between the valve core (211) and the valve housing (212); The valve core (211) is provided with a first valve hole (2111) and a second valve hole (2112), and the second valve hole (2112) is connected between the first valve hole (2111) and the annular channel (210) to form the liquid flow channel (20); The first valve hole (2111) is in communication with the intermediate cavity (102), and the annular channel (210) is in communication with the oil storage cavity; The magnetic conductive block (213) is sleeved on the valve core (211), and the magnetic conductive block (213) is located on a side of the second valve hole (2112) close to the middle cavity (102); the coil (214) is sleeved on the magnetic conductive block (213); The valve core (211) is tubular, the first valve hole (2111) extends along the axial direction of the valve core (211), and the second valve hole (2112) extends along the radial direction of the valve core (211).

10. The vibration absorber according to claim 9, characterized in that The external valve (2) further comprises a magnetic isolation member (22), and magnetic isolation is performed between two adjacent valve body units (21) via the magnetic isolation member (22).

11. A suspension system, characterized in that: A vibration damper comprising any one of claims 1 to 10.

12. A vehicle, characterized in that: The invention comprises the shock absorber according to any one of claims 1 to 10 or the suspension system according to claim 11.

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