Shock absorber and vehicle having the same

Abstract

The application discloses a shock absorber and a vehicle with the same. The shock absorber comprises an oil cylinder, a piston assembly, a cylinder assembly, an oil passage and a movable element. The oil cylinder is provided with a first chamber. One end of the piston assembly extends into the first chamber, and the piston assembly is movable along the axial direction of the oil cylinder. The cylinder assembly comprises a cylinder barrel, which is sleeved on the outer circumferential side of the oil cylinder, and the inner wall of the cylinder barrel and the outer wall of the oil cylinder jointly define a containing cavity. The oil passage is used for connecting the first chamber and the containing cavity, and the oil passage, the first chamber and the containing cavity form a damping adjustment cavity. The movable element is arranged in the damping adjustment cavity, and the movable element divides the damping adjustment cavity into a first medium chamber and a second medium chamber. The movable element is moved under the action of the piston assembly to adjust the volume of the second medium chamber, and the first medium chamber comprises at least part of the first chamber. According to the shock absorber, the size of the shock absorber is reduced, and the applicability of the shock absorber is improved.

Description

Technical Field

[0001] This invention relates to the field of shock absorber technology, and in particular to a shock absorber and a vehicle having the same. Background Technology

[0002] In related technologies, gas dampers typically consist of a cylinder and a damper body, which are connected by an oil-gas pipe. In this type of gas damper, the cylinder and the damper body need to be installed separately, which makes installation difficult in compact design spaces, resulting in poor applicability. Furthermore, excessively long oil-gas pipes can easily lead to untimely oil return and idle stroke, affecting the damping effect. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. Therefore, one object of the present invention is to provide a vibration damper that reduces the size of the vibration damper and improves its applicability.

[0004] Another object of the present invention is to provide a vehicle employing the above-described shock absorber.

[0005] A vibration damper according to a first aspect of the present invention includes: a hydraulic cylinder having a first chamber formed therein; a piston assembly having one end extending into the first chamber and being movable along the axial direction of the hydraulic cylinder; a cylinder assembly including a cylinder barrel sleeved on the outer periphery of the hydraulic cylinder, the inner wall of the cylinder barrel and the outer wall of the hydraulic cylinder jointly defining a receiving cavity; an oil passage for connecting the first chamber and the receiving cavity, the oil passage, the first chamber, and the receiving cavity forming a damping adjustment cavity; and a movable member disposed within the damping adjustment cavity, the movable member dividing the damping adjustment cavity into a first medium chamber and a second medium chamber, the movable member moving under the action of the piston assembly to adjust the volume of the second medium chamber, the first medium chamber including at least a portion of the first chamber.

[0006] According to the embodiments of the present invention, the shock absorber, by sleeved on the outer periphery of the oil cylinder, reduces the size of the shock absorber while ensuring the damping effect of the shock absorber, thereby improving the applicability of the shock absorber and making it suitable for more vehicle models. At the same time, there is no need to consider the installation position of the external cylinder during installation, thereby reducing the installation difficulty.

[0007] According to some embodiments of the present invention, the second medium chamber includes at least a portion of the receiving cavity.

[0008] According to some embodiments of the present invention, the movable member is disposed within the receiving cavity, and the movable member divides the receiving cavity into an upper receiving chamber and a lower receiving chamber, the upper receiving chamber constituting the second medium chamber, and the lower receiving chamber, the oil passage, and the first chamber constituting the first medium chamber.

[0009] According to some embodiments of the present invention, the first medium chamber is used to fill a first medium, and the second medium chamber is used to fill a second medium, wherein the first medium is different from the second medium.

[0010] According to some embodiments of the present invention, the first medium is oil and the second medium is an elastic element.

[0011] According to some embodiments of the present invention, the first medium is oil and the second medium is an inert gas.

[0012] According to some embodiments of the present invention, the hydraulic cylinder and the cylinder barrel are coaxially arranged.

[0013] According to some embodiments of the present invention, the cylinder barrel includes a cylinder body and a cylinder head, the cylinder head is disposed at one end of the cylinder body along the axial direction, the cylinder head and the cylinder body together define the receiving cavity, an air inlet is formed on the cylinder head, and the upper receiving cavity communicates with the outside through the air inlet.

[0014] According to some embodiments of the present invention, the cylinder assembly further includes a bushing connector, which is connected to the hydraulic cylinder for connecting the shock absorber to the vehicle body / wheel. The cylinder barrel and the bushing connector are integrally formed, and the oil passage is formed within the bushing connector.

[0015] According to some embodiments of the present invention, a mounting groove is formed on the bushing connector, the mounting groove is connected to the receiving cavity and the oil passage respectively, one end of the oil cylinder is fitted in the mounting groove, and the inner diameter of the mounting groove is smaller than the outer diameter of the cylinder barrel.

[0016] According to some embodiments of the present invention, it further includes: a regulating valve disposed on the oil passage, the regulating valve being used to regulate the flow rate of the medium in the first medium chamber.

[0017] According to some embodiments of the present invention, the regulating valve is a solenoid valve.

[0018] According to some embodiments of the present invention, the regulating valve is a rotary damping valve.

[0019] According to some embodiments of the present invention, the regulating valve has a normally open oil passage, at least one compression oil passage, and at least one recovery oil passage. The two ends of the normally open oil passage are respectively connected to the first chamber and the lower receiving chamber. The compression oil passage is provided with a compression valve for controlling the connection and disconnection between the compression oil passage and the first chamber and the lower receiving chamber. The recovery oil passage is provided with a recovery valve for controlling the connection and disconnection between the recovery oil passage and the first chamber and the lower receiving chamber.

[0020] According to some embodiments of the present invention, the regulating valve includes: a valve seat having a first compression oil passage, a first normally open oil passage, and a first recovery oil passage; a compression valve being provided on the first compression oil passage and a recovery valve being provided on the first recovery oil passage; a valve core having one end extending into the valve seat; the valve core having a second compression oil passage, a second normally open oil passage, and a second recovery oil passage; the second compression oil passage being connected to the first compression oil passage and forming the compression oil passage; the second normally open oil passage being connected to the first normally open oil passage and forming the normally open oil passage; and the second recovery oil passage being connected to the first recovery oil passage and forming the recovery oil passage; and a knob assembly having the knob assembly sleeved on the other end of the valve core; when the knob assembly rotates, it drives the valve core to rotate, causing the second compression oil passage to connect with the first compression oil passage or the second recovery oil passage to connect with the first recovery oil passage.

[0021] According to some embodiments of the present invention, there are multiple compression oil passages and multiple recovery oil passages, the multiple recovery oil passages are spaced apart in the circumference of the multiple compression oil passages, and the aperture of each recovery oil passage is larger than the aperture of each compression oil passage.

[0022] According to some embodiments of the present invention, at least two of the plurality of compression oil passages have different orifice diameters.

[0023] According to some embodiments of the present invention, the knob assembly includes a seal and a knob. The seal is disposed between the valve core and the knob, and the seal has a plurality of grooves. The knob has a plurality of protrusions and a plurality of position markings. The plurality of protrusions and the plurality of position markings are respectively located on both sides of the thickness direction of the knob. The plurality of protrusions correspond one-to-one with the plurality of grooves, and the protrusions fit into the grooves. The plurality of position markings correspond one-to-one with the plurality of protrusions.

[0024] A vehicle according to a second aspect of the present invention includes a shock absorber according to the first aspect of the present invention described above.

[0025] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0026] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0027] Figure 1 This is a schematic diagram of a vibration damper according to an embodiment of the present invention;

[0028] Figure 2 This is a cross-sectional view of a vibration damper according to an embodiment of the present invention;

[0029] Figure 3 yes Figure 2 Enlarged view of part A shown in the center circle;

[0030] Figure 4 This is a cross-sectional view of the regulating valve of the shock absorber according to an embodiment of the present invention;

[0031] Figure 5 This is a schematic diagram of the compression oil circuit and the recovery oil circuit of the shock absorber according to an embodiment of the present invention;

[0032] Figure 6 This is a schematic diagram of the knob component of a vibration damper according to an embodiment of the present invention;

[0033] Figure 7 yes Figure 6 A schematic diagram of the knob at another angle;

[0034] Figure 8 yes Figure 6 A cross-sectional view of the knob shown;

[0035] Figure 9 This is a schematic diagram of the seal of a vibration damper according to an embodiment of the present invention;

[0036] Figure 10 yes Figure 9 A cross-sectional view of the seal shown;

[0037] Figure 11 This is a flow path diagram of the oil in the vibration damper under low-speed compression state according to an embodiment of the present invention;

[0038] Figure 12 yes Figure 11 Enlarged view of section B shown in the center circle;

[0039] Figure 13 This is a flow path diagram of the oil in a vibration damper under high-speed compression state according to an embodiment of the present invention;

[0040] Figure 14 yes Figure 13 Enlarged view of section C, shown in the center circle;

[0041] Figure 15 This is a flow path diagram of the oil in the low-speed recovery state of the shock absorber according to an embodiment of the present invention;

[0042] Figure 16 yes Figure 15 Enlarged view of section D shown in the center circle;

[0043] Figure 17 This is a flow path diagram of the oil in the high-speed recovery state of the shock absorber according to an embodiment of the present invention;

[0044] Figure 18 yes Figure 17 Enlarged view of section E shown in the middle circle.

[0045] Figure label:

[0046] 100: Shock absorber;

[0047] 1: Cylinder assembly; 11: Cylinder barrel; 111: Receiving cavity; 1111: Upper receiving chamber; 1112: Lower receiving chamber; 112: Second medium chamber; 113: First medium chamber; 12: Moving part; 13: Air inlet; 14: Oil passage; 16: Cylinder head; 17: Cylinder body; 18: Bushing connector; 181: Mounting groove; 182: Mounting hole; 2: Hydraulic cylinder; 21: First chamber; 22: Hydraulic cylinder head; 23: Hydraulic cylinder body; 3: Piston assembly; 4: Regulating valve; 41: Normally open oil passage; 42: Compressed oil 43: Recovery oil circuit; 44: Valve seat; 441: First compression oil circuit; 442: Compression valve; 443: First normally open oil circuit; 444: First recovery oil circuit; 445: Recovery valve; 45: Valve core; 451: Second compression oil circuit; 452: Second normally open oil circuit; 453: Second recovery oil circuit; 46: Knob assembly; 461: Seal; 4611: Groove; 462: Knob; 4621: Protrusion; 4622: Gear position indicator; 47: Rotary damping valve; 5: Dust cover; 6: Buffer. Detailed Implementation

[0048] In related technologies, gas dampers typically employ an oil-gas separation structure, meaning the cylinder and the main body of the gas damper are separate. Currently, the arrangement of the cylinder and the main body of the damper can be divided into two types: one is a back-mounted structure, where the cylinder is offset and connected to the outer wall of the main body of the damper; the other is a separate structure, where the cylinder and the main body of the damper are separate and connected by an oil-gas pipe.

[0049] However, the first arrangement mentioned above increases the longitudinal or lateral dimensions of the gas shock absorber, requiring a larger installation space. Furthermore, the cylinder restricts the travel of the swing arm of the shock absorber assembly during operation, resulting in significant limitations and poor applicability. The second arrangement, where the cylinder is completely separated from the shock absorber assembly, requires separate installation, making installation difficult in compact spaces and further complicating applicability. Additionally, excessively long oil-gas pipes can lead to delayed oil return, causing idle travel and affecting the damping effect.

[0050] The following is for reference. Figures 1-18 A vibration damper 100 according to an embodiment of the first aspect of the present invention is described.

[0051] like Figures 1-18 As shown, the shock absorber 100 according to a first aspect embodiment of the present invention includes a hydraulic cylinder 2, a piston assembly 3, a cylinder assembly 1, an oil passage 14, and a movable component 12.

[0052] Specifically, a first chamber 21 is formed within the hydraulic cylinder 2. One end of the piston assembly 3 extends into the first chamber 21, and the piston assembly 3 is movable along the axial direction of the hydraulic cylinder 2. The cylinder assembly 1 includes a cylinder barrel 11, which is sleeved on the outer periphery of the hydraulic cylinder 2. The inner wall of the cylinder barrel 11 and the outer wall of the hydraulic cylinder 2 together define a receiving cavity 111. An oil passage 14 connects the first chamber 21 and the receiving cavity 111, and the oil passage 14, the first chamber 21, and the receiving cavity 111 form a damping adjustment cavity. A movable member 12 is disposed within the damping adjustment cavity, dividing the damping adjustment cavity into a first medium chamber 113 and a second medium chamber 112. The movable member 12 moves under the action of the piston assembly 3 to adjust the volume of the second medium chamber 112. The first medium chamber 113 includes at least a portion of the first chamber 21.

[0053] For example, in Figures 1-3 In the example, the cylinder 2 has a first chamber 21 extending axially. One end of the cylinder 2 extends into the receiving cavity 111 and is threadedly connected to the side wall of the receiving cavity 111, so that the cylinder barrel 11 surrounds the outer side wall of the cylinder 2. The outer diameter of the movable member 12 is greater than or equal to the inner diameter of the damping adjustment cavity, so that the movable member 12 can divide the damping adjustment cavity into a first medium chamber 113 and a second medium chamber 112, and can prevent the medium in the first medium chamber 113 from entering the second medium chamber 112, and prevent the medium in the second medium chamber 112 from entering the first medium chamber 113, so that the first medium chamber 113 and the second medium chamber 112 are not connected to each other.

[0054] Oil passage 14 is located between first chamber 21 and receiving chamber 111, forming a damping adjustment chamber with oil passage 14, first chamber 21, and receiving chamber 111. The damping adjustment chamber provides the vehicle with a large stroke and wide damping bandwidth adjustment range, enabling the vehicle to be used on all terrains and preventing damping force attenuation. The damping adjustment chamber contains resistance, which reduces the amplitude of piston assembly 3 moving axially along cylinder 2, ensuring vehicle stability during driving.

[0055] When the pressure in the second medium chamber 112 is greater than the pressure in the first medium chamber 113, the movable member 12 moves towards the first medium chamber 113. This increases the volume of the second medium chamber 112 and decreases the volume of the first medium chamber 113. The medium in the first medium chamber 113 pushes the piston assembly 3 away from the cylinder 11, thus achieving the vibration damping function of the damper 100. When the pressure in the second medium chamber 112 is equal to the pressure in the first medium chamber 113, the movable member 12 moves within the second medium chamber 112... The position of the piston assembly 3 remains stable. When the pressure in the second medium chamber 112 is less than the pressure in the first medium chamber 113, the movable part 12 moves toward the second medium chamber 112. At this time, the volume of the first medium chamber 113 is increased and the volume of the second medium chamber 112 is decreased. The first medium in the first chamber 21 pushes the piston assembly 3 toward the cylinder 11, that is, the first medium in the first chamber 21 moves toward the first medium chamber 113 to realize the vibration damping function of the damper 100.

[0056] Since the cylinder barrel 11 is sleeved on the outer periphery of the oil cylinder 2, the axial dimension of the damper 100 is reduced, thereby giving the piston assembly 3 of the damper 100 a larger stroke, which improves the damping efficiency of the damper 100.

[0057] According to the embodiments of the present invention, the shock absorber 100, by sleeved on the outer periphery of the oil cylinder 2, reduces the size of the shock absorber 100 while ensuring the damping effect of the shock absorber 100, and can ensure that the piston assembly 3 of the shock absorber 100 has a large stroke, thereby improving the applicability of the shock absorber 100 and making it suitable for more vehicle models. At the same time, there is no need to consider the installation position of the external cylinder 11 during installation, thereby reducing the installation difficulty.

[0058] According to some embodiments of the present invention, with reference to Figure 1 and Figure 2 The second medium chamber 112 includes at least a partially receiving cavity 111. This arrangement increases the volume of the second medium chamber 112, thereby increasing the damping margin of the damper 100.

[0059] According to some embodiments of the present invention, with reference to Figure 1 and Figure 2 The movable component 12 is located within the receiving cavity 111, dividing the receiving cavity 111 into an upper receiving chamber 1111 and an upper receiving chamber 1112. The upper receiving chamber 1111 constitutes the second medium chamber 112, and the upper receiving chamber 1112, oil passage 14, and first chamber 21 constitute the first medium chamber 113. This arrangement has several advantages. Firstly, the length of the receiving cavity 111 along the axial direction of the cylinder 2 is shorter than the lengths of the first chamber and oil passage 14, which limits the movement range of the movable component 12. This limits the damping adjustment range between the first medium chamber 113 and the second medium chamber 112, preventing over-adjustment and subsequent delayed recovery, thus avoiding idle travel that could affect vibration damping and improving the user experience. Secondly, the larger inner diameter of the receiving cavity 111 facilitates the installation of the movable component 12 and allows for a larger movable component 12, which is beneficial for achieving a better vibration damping effect of the damper 100.

[0060] In other embodiments, the movable member 12 can be disposed within the first chamber 21, in which case the movable member 12 divides the first chamber 21 into an upper chamber and a lower chamber. The upper chamber constitutes the second medium chamber 112, and the lower chamber, oil passage 14, and receiving cavity 111 constitute the first medium chamber 113. In other embodiments, the movable member 12 can be disposed within the oil passage 14, in which case the movable member 12 divides the oil passage 14 into an upper oil passage segment and a lower oil passage segment. The upper oil passage segment and the first chamber 21 constitute the second medium chamber 112, and the lower oil passage segment and receiving cavity 111 constitute the first medium chamber 113.

[0061] According to some embodiments of the present invention, a first medium chamber 113 is used to fill a first medium, and a second medium chamber 112 is used to fill a second medium, wherein the first medium and the second medium are different. That is, the density of the first medium is different from that of the second medium. This makes pressure changes within the first medium chamber 113 and the second medium chamber 112 more sensitive, enabling the shock absorber 100 to achieve rapid vibration reduction according to road conditions.

[0062] According to some embodiments of the present invention, the first medium is oil, and the second medium is an elastic element. The oil possesses excellent viscosity, lubricity, and mechanical stability, while also exhibiting good vibration damping, buffering, sealing, waterproofing, and damping properties. Using oil as the medium increases the flow velocity of the medium within the lower receiving cavity 111, the oil passage 14, and the first chamber 21, thereby improving vibration damping efficiency. The elastic element possesses a large elastic force; that is, the elastic element can generate elastic force according to relative displacement. Under the action of the elastic force, the position of the movable element 12 is adjusted to achieve the vibration damping effect of the vibration damper 100.

[0063] According to other embodiments of the present invention, the first medium is oil, and the second medium is an inert gas. The inert gas has the advantage of being chemically inert. Therefore, using oil and inert gas as the media in the first medium chamber 113 and the second medium chamber 112 respectively can prevent the oil from reacting with the inert gas, effectively improving the operational stability of the shock absorber 100.

[0064] According to some embodiments of the present invention, with reference to Figure 1 and Figure 2 The hydraulic cylinder 2 and the cylinder barrel 11 are coaxially arranged. Therefore, the central axis of the cylinder barrel 11, the central axis of the moving part 12, the central axis of the hydraulic cylinder 2, and the central axis of the piston assembly 3 coincide. When the shock absorber 100 is applied to a vehicle, the moving part 12 moves along the axial direction of the cylinder barrel 11, making the pushing of the moving part 12 on the medium in the second medium chamber 112 or the medium in the first medium chamber 113 smoother; the piston assembly 3 moves along the axial direction of the cylinder barrel 11, making the force applied by the piston assembly 3 on the oil in the first chamber 21 more even, thereby increasing the stability of the piston assembly 3 during movement, and effectively improving the stability of the shock absorber 100 during use.

[0065] According to some embodiments of the present invention, with reference to Figure 1 and Figure 2 The cylinder 11 includes a cylinder body 17 and a cylinder head 16. The cylinder head 16 is located at one axial end of the cylinder body 17. The cylinder head 16 and the cylinder body 17 together define a receiving cavity 111. An air inlet 13 is formed on the cylinder head 16, and the upper receiving cavity 1111 communicates with the outside through the air inlet 13. This facilitates the injection of inert gas into the upper receiving cavity 1111 through the air inlet 13, thereby facilitating the adjustment of the volume of inert gas in the upper receiving cavity 1111 to achieve the vibration damping function of the vibration damper 100.

[0066] According to some specific embodiments of the present invention, refer to Figures 1-3 The cylinder assembly 1 also includes a bushing connector 18, which connects to the hydraulic cylinder 2 and is used to connect the shock absorber 100 to the vehicle body / wheel. For example, a mounting hole 182 is formed on the side of the bushing connector 18 away from the hydraulic cylinder 2, and fasteners are connected to the vehicle body / wheel through the mounting hole 182. The cylinder barrel 11 and the bushing connector 18 are integrally formed, saving machining steps, thereby improving production efficiency and increasing the structural strength of the cylinder assembly 1. An oil passage 14 is formed within the bushing connector 18, increasing the space for the oil passage 14 and facilitating its machining.

[0067] Furthermore, referring to Figure 2 and Figure 3A mounting groove 181 is formed on the bushing connecting seat 18, which communicates with the receiving cavity 111 and the oil passage 14. One end of the hydraulic cylinder 2 is fitted into the mounting groove 181, and the inner diameter of the mounting groove 181 is smaller than the outer diameter of the cylinder barrel 11. This arrangement increases the connection stability of the hydraulic cylinder 2 on the bushing connecting seat 18. At the same time, because the inner diameter of the mounting groove 181 is smaller than the outer diameter of the cylinder barrel 11, the outer wall of the hydraulic cylinder 2 and the inner wall of the cylinder barrel 11 are separated, thereby forming the receiving cavity 111.

[0068] According to some embodiments of the present invention, with reference to Figure 4 The shock absorber 100 also includes a regulating valve 4, which is located on the oil passage 14. The regulating valve 4 is used to regulate the flow rate of the medium in the first medium chamber 113. That is, the regulating valve 4 can control the oil pressure difference between the medium in the second medium chamber 112 and the medium in the first medium chamber 113, thereby adjusting the damping of the shock absorber 100.

[0069] Optionally, the regulating valve 4 is a solenoid valve.

[0070] Optionally, the regulating valve 4 can also be a rotary damping valve 47. The rotary damping valve 47 is operated electromagnetically and often employs a passive mechanism, giving it excellent vibration damping performance. The rotary damping valve 47 features an electromagnetic bearing and has a superior structure. Using a rotary damping valve 47 as the regulating valve 4 combines electromagnetic operation with vibration damping, thus extending the service life of the regulating valve 4.

[0071] According to some specific embodiments of the present invention, refer to Figure 4 The regulating valve 4 has a normally open oil passage 41, at least one compression oil passage 42 and at least one recovery oil passage 43. The two ends of the normally open oil passage 41 are respectively connected to the first chamber 21 and the lower receiving chamber 111. The compression oil passage 42 is provided with a compression valve 442 for controlling the connection and disconnection between the compression oil passage 42 and the first chamber 21 and the lower receiving chamber 111. The recovery oil passage 43 is provided with a recovery valve 445 for controlling the connection and disconnection between the recovery oil passage 43 and the first chamber 21 and the lower receiving chamber 111.

[0072] like Figure 3 and Figure 4 As shown, when the piston assembly 3 is stationary, it indicates that the vehicle is stationary or traveling on a smooth road. The vehicle does not need to use the shock absorber 100 for vibration reduction. At this time, the normally open oil circuit 41 connects the first chamber 21 and the upper receiving chamber 1112, the compression oil circuit 42 is closed, and the recovery oil circuit 43 is closed. The oil pressure in the first chamber 21 and the upper receiving chamber 1112 can be adjusted through the normally open oil circuit 41 to ensure that the piston assembly 3 is stationary.

[0073] When the piston assembly 3 moves at low speed, it indicates that the vehicle is traveling on a relatively stable road section. The vehicle uses the shock absorber 100 to perform small-amplitude vibration reduction. At this time, the normally open oil circuit 41 connects the first chamber 21 and the upper receiving chamber 1112, the compression oil circuit 42 is in a closed state, and the recovery oil circuit 43 is in a closed state. The oil pressure in the first chamber 21 and the upper receiving chamber 1112 can be adjusted through the normally open oil circuit 41, thereby realizing the vibration reduction function of the shock absorber 100.

[0074] Furthermore, during the high-speed movement of the piston assembly 3, when one end of the piston assembly 3 moves toward the cylinder barrel 11, the compression valve 442 opens and the return valve 445 closes, connecting the first chamber 21 and the upper receiving chamber 1112 via the normally open oil passage 41 and the compression oil passage 42. When one end of the piston assembly 3 moves away from the cylinder barrel 11, the compression valve 442 closes and the return valve 445 opens, connecting the first chamber 21 and the upper receiving chamber 1112 via the normally open oil passage 41 and the return oil passage 43.

[0075] like Figure 13 and Figure 14 As shown, during the high-speed movement of the piston assembly 3, when the piston assembly 3 moves towards the cylinder barrel 11, it will impact a portion of the oil in the first chamber 21 (i.e., Figure 13 The right side of the piston assembly 3 forms a compression, increasing the pressure in the first chamber 21. Since the first chamber 21 is connected to the upper receiving chamber 1112, the pressure in the upper receiving chamber 1112 is further increased, making the pressure in the first chamber 21 greater than the pressure in the upper receiving chamber 1112. The normally open oil passage 41 alone cannot alleviate the pressure difference between the first chamber 21 and the upper receiving chamber 1112. At this time, the compression valve 442 is in the open position, and the compression oil passage 42 can be used as a supplement to the normally open oil passage 41, so that the oil in the first chamber 21 can enter the upper receiving chamber 1112 through the compression oil passage 42 and the normally open oil passage 41. This improves the efficiency of oil transmission from the first chamber 21 to the upper receiving chamber 1112, thereby reducing the damping force generated during oil transmission and improving the vibration damping effect of the shock absorber 100.

[0076] like Figure 17 and Figure 18As shown, during the high-speed movement of the piston assembly 3, when the piston assembly 3 moves away from the cylinder barrel 11, the pressure on the right side of the first chamber 21 decreases. Since the first chamber 21 is connected to the upper receiving chamber 1112, the pressure in the upper receiving chamber 1112 also decreases. Consequently, the pressure in the first chamber 21 is less than the pressure in the upper receiving chamber 1112. The normally open oil passage 41 alone cannot alleviate the pressure difference between the upper receiving chamber 1112 and the first chamber 21. At this time, the recovery valve 445 is in the open position, and the recovery oil passage 43 serves as a supplement to the normally open oil passage 41 during the recovery process. This allows the oil in the upper receiving chamber 1112 to enter the first chamber 21 through the normally open oil passage 41 and the recovery oil passage 43, thereby reducing the damping force generated during the oil transmission process and improving the vibration damping effect of the shock absorber 100.

[0077] According to some embodiments of the present invention, such as Figure 4 As shown, the regulating valve 4 includes a valve seat 44, a valve core 45, and a knob assembly 46. The valve seat 44 forms a first compression oil passage 441, a first normally open oil passage 443, and a first recovery oil passage 444. A compression valve 442 is provided on the first compression oil passage 441, and a recovery valve 445 is provided on the first recovery oil passage 444. One end of the valve core 45 extends into the valve seat 44, and the valve core 45 forms a second compression oil passage 451, a second normally open oil passage 452, and a second recovery oil passage 453. The second compression oil passage 451 is connected to the first compression oil passage 441 to form a compression oil passage 42, the second normally open oil passage 452 is connected to the first normally open oil passage 443 to form a normally open oil passage 41, and the second recovery oil passage 453 is connected to the first recovery oil passage 444 to form a recovery oil passage 43. The knob assembly 46 is sleeved on the other end of the valve core 45. When the knob assembly 46 rotates, it drives the valve core 45 to rotate, so that the second compressed oil circuit 451 is connected to the first compressed oil circuit 444.

[0078] The valve seat 44 and the cylinder barrel 11 are connected by a threaded seal. One end of the valve core 45 is connected to the valve seat 44, and the other end of the valve core 45 is connected to the knob assembly 46. By applying force to the knob assembly 46, the valve core 45 is rotated around the central axis of the valve seat 44, thereby controlling the second compression oil passage 451 on the valve core 45 to be misaligned or opposite to the first compression oil passage 441, and the second recovery oil passage 453 to be misaligned or opposite to the first recovery oil passage 444. This facilitates the connection of the corresponding compression oil passage 42 or recovery oil passage 43 during high-speed movement, thereby improving vibration reduction efficiency.

[0079] Furthermore, referring to Figure 5 There are multiple compression oil passages 42 and multiple recovery oil passages 43. The multiple recovery oil passages 43 are spaced apart around the circumference of the multiple compression oil passages 42, and the diameter of each recovery oil passage 43 is larger than the diameter of each compression oil passage 42. In the description of this invention, "multiple" means two or more.

[0080] During high-speed movement, when the compression valve 442 is closed, the pressure difference between the first chamber 21 and the upper receiving chamber 1112 increases. The compression valve 442 then opens, allowing the oil to flow rapidly along the compression oil passage 42 after passing through the compression valve 442, thus quickly damping vehicle vibration and improving vehicle comfort. When the return valve 445 is closed, oil flows only through the normally open oil passage 41, gradually increasing the vehicle's rebound force. The return valve 445 then opens, allowing the oil to flow back to the first chamber 21 through the return oil passage 43, thereby pushing the piston assembly 3 to return to its original position, enabling the tire to quickly contact the ground, generating grip, and improving vehicle passability.

[0081] During the high-speed compression process, as the piston assembly 3 moves towards the first chamber 21, it exerts a squeezing force on the oil, pushing it through the compression oil passage 42 to dampen vehicle vibration. To prevent the vehicle from moving downwards too quickly, the orifice of the compression oil passage 42 is set to be smaller, slowing down the flow rate of the oil within the compression oil passage and allowing the vehicle to move downwards slowly. During the high-speed recovery process, the recovery force comes from the pressure difference between the medium in the second medium chamber 112 and the medium in the first medium chamber 113 of the cylinder 11. To ensure the vehicle quickly returns to its initial state, the orifice of the recovery oil passage 43 is set to be larger, ensuring that more oil can flow quickly to the first medium chamber 113 to push the moving part 12. Therefore, the recovery oil passage 43 is spaced circumferentially along the compression oil passage 42, and the orifice of the recovery oil passage 43 is larger than that of the compression oil passage 42, improving the recovery efficiency and avoiding the problem of insufficient oil return due to excessively long oil passages, thereby improving the stability of vibration damping.

[0082] Furthermore, at least two of the multiple compression oil passages 42 have different orifice diameters. For example... Figure 5 As shown, there are eight compression oil passages 42, three of which have small orifice diameters, two have medium orifice diameters, and the remaining three have large orifice diameters. The smaller the orifice diameter of the compression oil passage 42, the greater the damping force, that is, the greater the frictional force of the oil passing through, and the slower the flow rate. This arrangement allows for easy adjustment of the knob assembly 46 to make the second compression oil passage section 451 correspond to the first compression oil passage section 441 with different orifice diameters according to actual conditions. This allows for adjustment of the oil flow rate in the compression oil passages 42, making the vibration damper 100 suitable for different damping amplitudes, thereby improving the applicability of the vibration damper 100.

[0083] According to some specific embodiments of the present invention, such as Figures 6-10As shown, the knob assembly 46 includes a seal 461 and a knob 462. The seal 461 is disposed between the valve core 45 and the knob 462. For example, the seal 461 is coaxially disposed on the side of the knob 462 near the valve core 45 to prevent oil leakage caused by the rotation of the knob 462 relative to the valve core 45, thereby improving the sealing performance of the shock absorber 100. The seal 461 has a plurality of grooves 4611, and the knob 462 has a plurality of protrusions 4621 and a plurality of position markings 4622. The plurality of protrusions 4621 and the plurality of position markings 4622 are respectively located in the thickness direction of the knob 462 (e.g., ...). Figure 6 On both sides of the vertical direction, there are multiple protrusions 4621 corresponding to multiple grooves 4611, and the protrusions 4621 fit into the grooves 4611. Multiple gear position marks 4622 correspond to multiple protrusions 4621.

[0084] For example, in Figures 6-10 In the example, the knob 462 has eight position markings 4622, and eight protrusions 4621 are formed in the thickness direction of the knob 462 corresponding to each position marking 4622. Correspondingly, eight grooves 4611 are formed on the sealing member 461 at the positions of each protrusion 4621. When the knob 462 is rotated, the protrusions 4621 of the knob 462 will engage with the grooves 4611 of the sealing member 461, ensuring the accuracy of the position adjustment and enabling the position markings 4622 to accurately correspond to multiple compression oil passages 42 with different orifice diameters.

[0085] In addition, the knob 462 is provided with a first limiting block on its edge. The first limiting block and the protrusion 4621 are located on the same side of the thickness direction of the knob 462. The seal 461 is provided with a second limiting block. The second limiting block and the groove 4611 are located on the same side of the thickness direction of the seal 461. Through the cooperation of the first limiting block and the second limiting block, the knob 462 is effectively limited, so as to avoid the knob 462 from rotating too much or too little during use, which would affect the opening and closing of the compressed oil circuit 42 and / or the recovery oil circuit 43.

[0086] In some alternative embodiments, refer to Figure 1 and Figure 2The shock absorber 100 also includes a retractable dust cover 5 and a buffer 6. The dust cover 5 is fitted over the cylinder 2 and piston assembly 3. The buffer 6 is fitted over the piston assembly 3 and is located inside the dust cover 5. The dust cover 5 effectively prevents dust and other contaminants from adhering to the inner wall of the cylinder 2 or the outer wall of the piston assembly 3 during use, thereby improving the smoothness of the piston assembly 3's movement within the cylinder 2 and enhancing the stability of the shock absorber 100. It also seals off oil vapors, preventing oil evaporation from affecting the damping effect. The buffer 6 is located at the end of the piston assembly 3 furthest from the cylinder 2. The buffer 6 cushions the movement of the piston assembly 3, preventing it from excessively extending into the cylinder 2 and damaging the inner wall. Furthermore, placing the buffer 6 inside the dust cover 5 prevents dust from adhering to the buffer 6 and entering the cylinder 2, ensuring the stability of the shock absorber 100.

[0087] Optionally, the inner and outer walls of the cylinder body 23 can be treated with various surface treatment processes such as polishing, grinding and electroplating (chrome) mirror finish, thereby effectively reducing the friction between the inner wall of the cylinder body 23 and the oil, effectively sealing oil and gas, and reducing the friction between the outer wall of the cylinder body 23 and the side wall of the moving part 12, making the movement of the moving part 12 along the axial direction of the cylinder body 23 smoother, thereby improving the vibration damping efficiency of the damper 100.

[0088] According to the nitrogen damping gas of the present invention, when the piston assembly 3 is in a static equilibrium state, the normally open oil passage 41 connects the first chamber 21 and the upper receiving chamber 1112, and the pressure of the second medium chamber 112 and the first medium chamber 113 remains in equilibrium. At this time, the oil is in a static state, and the compression valve 442 and the recovery valve 445 are both in a closed state.

[0089] like Figures 11-12 As shown, during low-speed compression, the piston assembly 3 moves towards the cylinder 11 with a small distance, resulting in a small increase in pressure in the first chamber 21 and the upper receiving chamber 1112. At this time, both the recovery valve 445 and the compression valve 442 are closed, and oil is transferred from the first chamber 21 into the upper receiving chamber 1112 along the normally open oil passage 41. This increases the pressure in the first medium chamber 113, meaning the pressure in the first medium chamber 113 is greater than the pressure in the second medium chamber 112. This causes the moving part 12 to move towards the second medium chamber 112, thereby reducing the pressure difference between the second medium chamber 112 and the first medium chamber 113. Because the pressure difference is small during the above process, the vibration damping effect can be achieved simply by opening the normally open oil passage 41.

[0090] like Figures 15-16As shown, during low-speed recovery, the piston assembly 3 moves away from the cylinder 11 by a small distance, resulting in a small decrease in pressure in the first chamber 21. Since the first chamber 21, the normally open oil passage 41, and the upper receiving chamber 1112 are connected, the pressure in the first medium chamber 113 decreases, meaning the pressure in the first medium chamber 113 is less than the pressure in the second medium chamber 112. Consequently, the moving part 12 moves towards the first medium chamber 113, further reducing the pressure difference between the second medium chamber 112 and the first medium chamber 113. At this time, both the recovery valve 445 and the compression valve 442 are closed. The oil in the first medium chamber 113 is transmitted to the first chamber 21 along the upper receiving chamber 1112 and the normally open oil passage 41. The oil pushes the piston assembly 3 to recover, allowing the tire to quickly contact the ground, generating traction and improving vehicle passability.

[0091] like Figures 13-14 As shown, during high-speed compression, the piston assembly 3 moves towards the cylinder barrel 11 and the movement distance is large, resulting in a large increase in pressure in the first chamber 21. This controls the opening of the compression valve 442, connecting the two ends of the compression oil circuit 42 to the upper receiving chamber 1112 and the first chamber 21. The first chamber 21 is connected to the upper receiving chamber 1112 through the normally open oil circuit 41. The simultaneous operation of the compression oil circuit 42 and the normally open oil circuit 41 causes the oil to be rapidly transferred from the first chamber 21 to the upper receiving chamber 1112. The pressure in the first medium chamber 113 increases, meaning the pressure in the first medium chamber 113 is greater than the pressure in the second medium chamber 112. Consequently, the moving part 12 moves towards the second medium chamber 112, thereby reducing the pressure difference between the second medium chamber 112 and the first medium chamber 113, thus rapidly attenuating vehicle vibration and improving vehicle comfort. Because the pressure difference in the above process is large, the normally open oil circuit 41 alone cannot achieve a good vibration reduction effect. It is necessary to open the compression oil circuit 42 as a supplement to the normally open oil circuit 41.

[0092] The opening of the compression oil passage 42 can be adjusted by the knob 462. Rotating the knob 462 causes the protrusion 4621 of the knob 462 to engage with the corresponding groove 4611 of the seal 461, so that the gear position mark 4622 can accurately correspond to the compression oil passage 42 with the corresponding aperture. This ensures that the oil flow rate of the compression oil passage 42 is different after the gear is adjusted, so that the shock absorber 100 has different damping amplitudes and improves the applicability of the shock absorber 100.

[0093] like Figures 17-18As shown, during high-speed recovery, the piston assembly 3 moves away from the cylinder 11 by a large distance, resulting in a significant pressure decrease in the first chamber 21. This causes the recovery valve 445 to open, connecting the two ends of the recovery oil passage 43 to the upper receiving chamber 1112 and the first chamber 21. The first chamber 21 is connected to the upper receiving chamber 1112 via the normally open oil passage 41. The simultaneous operation of the recovery oil passage 43 and the normally open oil passage 41 allows oil to be rapidly transferred from the upper receiving chamber 1112 to the first chamber 21, thereby stimulating the first medium chamber 1... The pressure in chamber 113 decreases, meaning the pressure in the first medium chamber 113 is much lower than the pressure in the second medium chamber 112. This causes the moving part 12 to move towards the first medium chamber 113, further reducing the pressure difference between the second medium chamber 112 and the first medium chamber 113. This allows the oil to be quickly transferred from the upper receiving chamber 1112 to the first chamber 21. The oil then rapidly pushes the piston assembly 3 back to its original position, allowing the tire to quickly contact the ground, generating grip and improving vehicle passability. Simultaneously, it avoids the problem of idle stroke caused by untimely oil return. Because the pressure difference in the above process is relatively large, a good recovery effect cannot be achieved solely through the normally open oil circuit 41; therefore, the recovery oil circuit 43 needs to be opened as a supplement to the normally open oil circuit 41.

[0094] The assembly process of the vibration damper 100 according to an embodiment of the present invention is as follows, and the order of the following assembly steps can be adjusted:

[0095] First, one end of the piston assembly 3 is inserted into the cylinder body 23 along the axial direction. The cylinder cover 22 is then passed through the other end of the piston assembly 3 and assembled onto the end of the cylinder body 23. Next, the movable part 12 is coaxially installed inside the cylinder body 17, and the cylinder 2 is coaxially mounted on the movable part 12. Then, the cylinder cover 16 is assembled onto the cylinder body 17. Then, the valve seat 44, valve core 45, and knob assembly 46 are installed in sequence. The regulating valve 4 and the cylinder assembly 1 are connected by a threaded seal. The valve core 45 is assembled into the cavity of the valve seat 44 and is limited in the axial direction by the end face. The sealing part 461 passes through the connecting rod head of the valve core 45 (the two limit each other) and is assembled into the cylinder assembly 1, and is connected to the cylinder assembly 1 by a threaded seal. The knob part 462 passes through the valve core 45 and is fixed with screws. Finally, the buffer part 6 is sleeved on the piston assembly 3, and the dust cover 5 is sleeved on the outer periphery of the piston assembly 3 and the cylinder 2.

[0096] A vehicle (not shown) according to a second aspect embodiment of the present invention includes a shock absorber 100 according to the first aspect embodiment described above.

[0097] According to the novel embodiment of the present invention, by employing the above-described shock absorber 100, the vehicle has greater compatibility, facilitates a more compact arrangement of the suspension arms and reduces weight, thereby reducing the cost of the main suspension.

[0098] Other configurations and operations of the vehicle according to embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0099] In the description of this invention, it should be understood that the terms "center", "length", "thickness", "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "axial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0100] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0101] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0102] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A vibration damper, characterized in that, include: A hydraulic cylinder, wherein a first chamber is formed inside the hydraulic cylinder; A piston assembly, one end of which extends into the first chamber, and the piston assembly is movable along the axial direction of the cylinder; A cylinder assembly, the cylinder assembly including a cylinder barrel, the cylinder barrel being sleeved on the outer periphery of the oil cylinder, the inner wall of the cylinder barrel and the outer wall of the oil cylinder jointly defining a receiving cavity; An oil passage is provided to connect the first chamber and the receiving cavity, and the oil passage, the first chamber, and the receiving cavity form a damping adjustment cavity. A movable component is disposed within the damping adjustment cavity, which divides the damping adjustment cavity into a first medium chamber and a second medium chamber. The movable component moves under the action of the piston assembly to adjust the volume of the second medium chamber. The first medium chamber includes at least a portion of the first chamber. A regulating valve is provided on the oil passage and is used to regulate the flow rate of the medium in the first medium chamber. The regulating valve is a rotary damping valve; the regulating valve has a normally open oil circuit, at least one compression oil circuit and at least one recovery oil circuit, the two ends of the normally open oil circuit are respectively connected to the first chamber and the receiving chamber, the compression oil circuit is provided with a compression valve for controlling the connection and disconnection between the compression oil circuit and the first chamber and the receiving chamber, and the recovery oil circuit is provided with a recovery valve for controlling the connection and disconnection between the recovery oil circuit and the first chamber and the receiving chamber.

2. The vibration damper according to claim 1, characterized in that, The second medium chamber includes at least a portion of the receiving cavity.

3. The vibration damper according to claim 2, characterized in that, The movable component is disposed within the receiving cavity, and the movable component divides the receiving cavity into an upper receiving chamber and a lower receiving chamber. The upper receiving chamber constitutes the second medium chamber, and the lower receiving chamber, the oil passage, and the first chamber constitute the first medium chamber.

4. The vibration damper according to claim 1, characterized in that, The first medium chamber is used to fill a first medium, and the second medium chamber is used to fill a second medium, wherein the first medium and the second medium are different.

5. The vibration damper according to claim 4, characterized in that, The first medium is oil, and the second medium is an elastic element.

6. The vibration damper according to claim 4, characterized in that, The first medium is oil, and the second medium is an inert gas.

7. The vibration damper according to any one of claims 1-6, characterized in that, The hydraulic cylinder and the pneumatic cylinder are coaxially arranged.

8. The vibration damper according to claim 3, characterized in that, The cylinder includes a cylinder body and a cylinder head. The cylinder head is located at one end of the cylinder body along its axial direction. The cylinder head and the cylinder body together define the receiving cavity. An air inlet is formed on the cylinder head, and the upper receiving cavity communicates with the outside through the air inlet.

9. The vibration damper according to claim 3, characterized in that, The cylinder assembly also includes a bushing connector, which is connected to the hydraulic cylinder and is used to connect the shock absorber to the vehicle body / wheel. The cylinder barrel and the bushing connector are integrally formed, and the oil passage is formed in the bushing connector.

10. The vibration damper according to claim 9, characterized in that, The bushing connector has an installation groove, which is connected to the receiving cavity and the oil passage respectively. One end of the oil cylinder is fitted into the installation groove, and the inner diameter of the installation groove is smaller than the outer diameter of the cylinder barrel.

11. The vibration damper according to claim 1, characterized in that, The regulating valve is a solenoid valve.

12. The vibration damper according to claim 1, characterized in that, The regulating valve includes: A valve seat, wherein the valve seat forms a first compression oil passage, a first normally open oil passage, and a first recovery oil passage, wherein the first compression oil passage is provided with the compression valve, and the first recovery oil passage is provided with the recovery valve; A valve core, one end of which extends into the valve seat, the valve core forming a second compression oil passage section, a second normally open oil passage section, and a second recovery oil passage section. The second compression oil passage section is connected to the first compression oil passage section and constitutes the compression oil passage. The second normally open oil passage section is connected to the first normally open oil passage section and constitutes the normally open oil passage. The second recovery oil passage section is connected to the first recovery oil passage section and constitutes the recovery oil passage. A knob assembly is sleeved on the other end of the valve core. When the knob assembly is rotated, it drives the valve core to rotate, thereby connecting the second compressed oil circuit section with the first compressed oil circuit section or connecting the second restored oil circuit section with the first restored oil circuit section.

13. The vibration damper according to claim 12, characterized in that, There are multiple compression oil passages and multiple recovery oil passages. The multiple recovery oil passages are spaced apart in the circumference of the multiple compression oil passages, and the diameter of each recovery oil passage is larger than the diameter of each compression oil passage.

14. The vibration damper according to claim 13, characterized in that, At least two of the multiple compression oil passages have different orifice diameters.

15. The vibration damper according to claim 14, characterized in that, The knob assembly includes a seal and a knob. The seal is disposed between the valve core and the knob and has multiple grooves. The knob has multiple protrusions and multiple position markings. The multiple protrusions and multiple position markings are respectively located on both sides of the knob in the thickness direction. The multiple protrusions correspond one-to-one with the multiple grooves, and the protrusions fit into the grooves. The multiple position markings correspond one-to-one with the multiple protrusions.

16. A vehicle, characterized in that, Includes the vibration damper according to any one of claims 1-15.

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