Shock absorber and control method thereof, electronic equipment, suspension and vehicle

Abstract

The invention relates to a shock absorber and a control method thereof, electronic equipment, a suspension and a vehicle, the shock absorber comprises a cylinder body, a piston rod and a piston connected with the piston rod, the piston is arranged in the cylinder body and divides the interior of the cylinder body into a first cavity and a second cavity, and a hole channel communicating the first cavity with the second cavity is formed in the piston; the piston comprises a piston body and a valve which are connected, the valve is used for opening or closing the hole channel so that the shock absorber can have a first working mode and a second working mode, and in the first working mode, the valve opens the hole channel; and in the second working mode, the valve closes the hole channel, so that the piston can be axially locked in the cylinder body. And when the shock absorber enters the second working mode, the shock absorber can effectively support the vehicle body, so that the vehicle can insist to walk to a maintenance point, the vehicle can be maintained or tires can be replaced, the function of the shock absorber is expanded, the buffer and shock absorption effects can be achieved, and the vehicle body can be effectively supported.

Description

Technical Field

[0001] The present disclosure relates to the technical field of vehicle vibration reduction, and in particular to a shock absorber and a control method thereof, an electronic device, a suspension, and a vehicle. Background Art

[0002] In order to improve the ride comfort of a vehicle, the suspension of the vehicle usually includes an elastic element (such as a coil spring, a leaf spring or a gas spring, etc.) and a shock absorber, which is arranged in parallel with the elastic element between the vehicle body and the wheels. However, in the related art, the function of the shock absorber is relatively simple, and it mainly plays a vibration reduction role. When there is a problem with the elastic element of the suspension, the suspension cannot support the vehicle body normally. Summary of the invention

[0003] In order to overcome the problems existing in the related art, the present disclosure provides a shock absorber and a control method thereof, an electronic device, a suspension, and a vehicle.

[0004] According to a first aspect of an embodiment of the present disclosure, there is provided a shock absorber, comprising a cylinder body, a piston rod and a piston connected to the piston rod,

[0005] The piston is disposed in the cylinder body and divides the interior of the cylinder body into a first chamber and a second chamber, and a hole connecting the first chamber and the second chamber is disposed on the piston;

[0006] The piston comprises a piston body and a valve connected to each other, wherein the valve is used to open or close the channel so that the shock absorber can have a first working mode and a second working mode;

[0007] In the first working mode, the valve opens the orifice;

[0008] In the second operating mode, the valve closes the orifice to enable the piston to be axially locked in the cylinder.

[0009] Optionally, the piston body and the valve are arranged along the axial direction of the cylinder body, and the valve includes a valve core part and a valve body part, the valve body part is used to be connected to the piston body, and the outer wall of the valve body part is in sealing contact with the inner wall of the cylinder body; the channel includes a first channel located on the valve body part and a second channel located on the piston body; the valve core part is connected to the piston rod, and the valve core part is movably arranged in the cylinder body along the axial direction of the cylinder body to close or open the first channel.

[0010] Optionally, a valve port is provided on the valve body portion, and the valve port is used to connect the first channel and the second channel. A ejector pin is provided on the valve core portion, and the ejector pin is used to cooperate with the valve port to adjust the opening of the valve port.

[0011] Optionally, the valve also includes a coil assembly and an elastic member; one end of the coil assembly is connected to the piston rod, and the other end of the coil assembly is connected to the valve core portion through the elastic member; the elastic member is used to provide elastic force so that the valve core portion remains in a position to open the first channel and the valve port; the coil assembly is used to provide magnetic field force so that the valve core portion can overcome the elastic force and close the first channel and the valve port.

[0012] Optionally, the coil assembly includes a coil and a cylindrical base; the coil is wound on the cylindrical base, one end of the cylindrical base is connected to the piston rod, and the other end of the cylindrical base forms an open end, one end of the elastic member extends into the interior of the cylindrical base through the open end and is connected to the inner wall of the cylindrical base.

[0013] Optionally, the first channel includes a first sub-channel and a second sub-channel arranged along the axial direction of the cylinder body, and a first cavity is formed in the valve body, and the first cavity is used to connect the first sub-channel with the second sub-channel; the first cavity includes a first limiting surface, and the first limiting surface is arranged around a first opening of the first sub-channel, and the first opening is an opening connecting the first sub-channel with the first cavity; the valve core part includes a valve core body and an annular protrusion formed on the outer side wall of the valve core body, the annular protrusion has a first end face and a second end face opposite to each other, and the annular protrusion is provided with a through hole with two ends extending to the first end face and the second end face respectively; along the axial direction of the cylinder body, the projection of the through hole is located on the first limiting surface.

[0014] Optionally, the first cavity further includes a second limiting surface, which is arranged around a second opening of the second sub-channel, and the second opening is an opening connecting the second sub-channel and the first cavity; along the axial direction of the cylinder body, the projection of the through hole is located on the second limiting surface.

[0015] Optionally, an outer wall of the valve body is provided with a mounting groove, and the valve also includes a sealing ring, which is arranged in the mounting groove and is used for sealing contact with the inner wall of the cylinder body; wherein, the mounting groove is connected with the first cavity, so that the mounting groove can be connected with the second chamber when the first end face abuts against the first limit surface, and can be connected with the first chamber when the second end face abuts against the second limit surface.

[0016] Optionally, the valve body portion includes a connecting piece, the connecting piece is used to be connected to the piston body, and the valve port is formed on the connecting piece.

[0017] Optionally, in the axial direction of the cylinder body, a second cavity is formed between the end surfaces of the connecting member and the piston body facing each other, and the valve port is communicated with the second channel through the second cavity.

[0018] Optionally, the connecting member includes a first cylindrical portion and a second cylindrical portion; the first cylindrical portion includes a first end plate and a first barrel section formed on the periphery of the first end plate, and the valve port is arranged on the first end plate; the second cylindrical portion includes a second end plate and a second barrel section formed on the periphery of the second end plate, the second end plate is constructed as a flange extending outward from the first end of the first barrel section, the first end is an end of the first barrel section away from the first end plate; the second barrel section is used to be sleeved and connected with the annular mounting portion on the piston body.

[0019] According to a second aspect of an embodiment of the present disclosure, a shock absorber control method is provided. The method is applied to the shock absorber mentioned above. The method includes:

[0020] When the shock absorber locking instruction is obtained, the shock absorber is controlled to be in the second working mode.

[0021] Optionally, the method is applied to the above-mentioned shock absorber, and the controlling the shock absorber to be in the second working mode includes:

[0022] According to the working condition of the shock absorber, the first end face of the annular protrusion is controlled to abut against the first limiting surface, or the second end face of the annular protrusion is controlled to abut against the second limiting surface.

[0023] Optionally, the shock absorber locking command is a locking command generated according to state information of the suspension detected by a sensor, or the shock absorber locking command is a locking command generated according to an operation of an operator.

[0024] Optionally, the state information of the suspension includes the height and / or acceleration of the suspension.

[0025] According to a third aspect of an embodiment of the present disclosure, there is provided an electronic device, comprising a memory and a processor, wherein the memory stores a computer program, and the processor is configured to execute the computer program to implement the above-mentioned shock absorber control method.

[0026] According to a fourth aspect of an embodiment of the present disclosure, there is provided a suspension comprising the above-mentioned shock absorber, wherein the shock absorber is used to be connected between a body and wheels of a vehicle.

[0027] According to a fifth aspect of an embodiment of the present disclosure, a vehicle is provided, comprising:

[0028] According to the above suspension; or,

[0029] According to the electronic device above; or,

[0030] According to the above-mentioned shock absorber.

[0031] The technical solution provided by the embodiments of the present disclosure may include the following beneficial effects: when the shock absorber provided by the present application is applied to the suspension of a vehicle, since the shock absorber has a first working mode and a second working mode, when the vehicle is in a normal driving state, the shock absorber can be placed in the first working mode, at which time the shock absorber plays a role in vibration reduction and buffering. When the elastic element of the suspension is damaged or the vehicle needs to be repaired, or the wheel needs to be replaced, the shock absorber can be placed in the second working mode to achieve travel locking. At this time, the shock absorber is equivalent to a rigid part, which can effectively support the vehicle body, which is conducive to enabling the vehicle to continue to travel to the maintenance point, and at the same time, it is also conducive to repairing the vehicle or replacing tires. The function of the shock absorber provided by the present disclosure is expanded, and it can not only play a role in buffering and vibration reduction, but also play an effective supporting role for the vehicle body.

[0032] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0034] Figure 1 is a schematic diagram of an application scenario of a shock absorber shown in an exemplary embodiment of the present disclosure, wherein the shock absorber and the elastic element are connected in parallel between the body and the wheel of a vehicle;

[0035] Figure 2 is a longitudinal cross-sectional schematic diagram of a partial structure of a shock absorber shown in an exemplary embodiment of the present disclosure, wherein the valve core portion is in a position to open the first channel and the valve port;

[0036] Figure 3 yes Figure 2 A partial enlarged schematic diagram of

[0037] Figure 4 is a longitudinal cross-sectional schematic diagram of a partial structure of a shock absorber shown in an exemplary embodiment of the present disclosure, wherein the shock absorber is in a compression condition, the valve core is in a first position, and a first end surface of an annular protrusion of the valve core is abutted against a first limiting surface of a first cavity;

[0038] Figure 5is a longitudinal cross-sectional schematic diagram of a partial structure of a shock absorber shown in an exemplary embodiment of the present disclosure, wherein the shock absorber is in a rebound condition, the valve core is in a second position, and the second end surface of the annular protrusion of the valve core is abutted against the second limiting surface of the first cavity;

[0039] Figure 6 is a flow chart of a shock absorber control method according to an exemplary embodiment of the present disclosure.

[0040] Reference numerals

[0041] 100- shock absorber; 10- cylinder body; 11- first chamber; 12- second chamber; 101- inner cylinder body; 102- outer cylinder body; 20- piston rod; 30- piston; 31- piston body; 311- annular mounting portion; 32- valve; 321- valve body; 3211- valve port; 3212- first cavity; 3213- first limit surface; 3214- second limit surface; 3215- mounting groove; 3216- connecting piece; 32161- first end plate; 32162- first barrel section; 32163- second end plate; 32164- second barrel section; 3219- communicating hole; 322- valve core section; 3221- ejector pin; 3222- valve core body; 3223- annular convex 3224-first end face; 3225-second end face; 3226-through hole; 323-coil assembly; 3231-cylindrical base; 324-elastic member; 33-channel; 331-first channel; 3311-first sub-channel; 3312-second sub-channel; 332-second channel; 3321-third sub-channel; 3322-fourth sub-channel; 40-second cavity; 50-first valve plate; 51-first shielding part; 60-second valve plate; 61-second shielding part; 70-sealing ring; 80-fastener; 90-limiting block; 200-elastic element; 300-body; 400-wheel; 500-electronic equipment; 510-processor; 520-sensor. DETAILED DESCRIPTION

[0042] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0043] It should be noted that all actions of acquiring signals, information or data in the present disclosure are carried out in compliance with the relevant data protection laws and policies of the country where the device is located and with the authorization given by the owner of the corresponding device.

[0044] In the description of the present disclosure, it should be understood that the terms "upper", "lower", etc., indicating directions or positional relationships, are defined based on the directions of the drawings shown in the accompanying drawings, and are only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, and a specific orientation structure and operation, and therefore cannot be understood as a limitation of the present disclosure. Optionally, the terms "upper" and "lower" may be the same as the upper and lower directions of the vehicle when the vehicle is in normal driving state. The terms "inside and outside" refer to the inside and outside of the corresponding structural contours. In addition, the terms "first", "second", etc., are only used to distinguish one element from another, and do not have sequentiality or importance.

[0045] The applicant found that in the related art, when the elastic element connected in parallel with the shock absorber is unable to support the vehicle due to damage (such as air spring leakage), the piston of the shock absorber cannot be axially locked in the cylinder of the shock absorber and cannot provide effective and normal support for the vehicle body. The vehicle cannot continue to travel and can only be repaired on the spot.

[0046] In view of this, if Figures 1 to 5 As shown, according to one aspect of the present disclosure, a shock absorber 100 is provided, the shock absorber 100 comprises a cylinder 10, a piston rod 20 and a piston 30, the piston 30 is connected to the piston rod 20, the piston 30 is arranged in the cylinder 10, and the interior of the cylinder 10 is divided into a first chamber 11 and a second chamber 12, that is, the piston 30 can divide the interior of the cylinder 10 into the first chamber 11 and the second chamber 12 along the axial direction of the cylinder 10, and the first chamber 11 and the second chamber 12 can be used to contain oil. A hole 33 (which can be called a throttle hole) connecting the first chamber 11 and the second chamber 12 is arranged on the piston 30, and the piston 30 comprises a piston body 31 and a valve 32 connected to each other, and the valve 32 is used to open or close the hole 33, so that the shock absorber 100 has a first working mode and a second working mode. In the first working mode, the valve 32 opens the hole 33, and in the second working mode, the valve 32 closes the hole 33, so that the piston 30 can be axially locked in the cylinder 10.

[0047] When the shock absorber 100 provided by the present application is applied to the suspension of a vehicle, Figure 1As shown, the shock absorber 100 can be installed between the vehicle body 300 and the wheel 400. In the shock absorber 100 provided in the present disclosure, the shock absorber 100 has a first working mode and a second working mode. When the vehicle is in a normal driving state, that is, the elastic element 200 (such as a leaf spring, a coil spring or an air elasticity) works normally, the shock absorber 100 can be in the first working mode, at which time, the shock absorber 100 plays a vibration reduction and buffering role. When the elastic element 200 of the suspension is damaged or the vehicle needs to be repaired, or the wheel 400 needs to be replaced, the shock absorber 100 can be put into the second working mode, that is, the valve 32 closes the channel 33 connecting the first chamber 11 and the second chamber 12 on the piston 30, so that the piston 30 can be axially locked in the cylinder 10 to achieve travel locking. At this time, the shock absorber 100 is equivalent to a rigid part, which can effectively support the vehicle body 300, which is conducive to enabling the vehicle to continue to travel to the maintenance point, and at the same time, it is also conducive to repairing the vehicle or replacing tires. It can be seen that in the present disclosure, the function of the shock absorber 100 is expanded, and it can not only play a role in buffering and vibration reduction, but also be used as a rigid support member to effectively support the vehicle body.

[0048] It is understood that in the present disclosure, the piston 30 can be axially locked at any position of the specified stroke, for example, it can be locked at the highest or lowest limit position of the stroke, or it can be locked between the limit positions, and the present disclosure does not limit this. Since it can be axially locked at any position within the stroke, the locking position can be adjusted according to different strokes, making the vehicle chassis more intelligent. In addition, the locking of the shock absorber 100 stroke can also be achieved by calibrating parameters according to the special working conditions of the vehicle.

[0049] In addition, it can be understood that in the present disclosure, the shock absorber 100 can be applied to any other part of the vehicle suitable for using the shock absorber 100, in addition to being applied to the suspension of the vehicle. In addition, the shock absorber 100 can be applied to any other device suitable for using the shock absorber 100, in addition to being applied to the vehicle, and the present disclosure does not limit this.

[0050] The present disclosure does not limit the arrangement relationship between the valve 32 and the piston body 31 and the structure of the valve 32. Figure 2 As shown, optionally, in one embodiment of the present disclosure, the piston body 31 and the valve 32 are arranged along the axial direction of the cylinder body 10, and the valve 32 includes a valve core portion 322 and a valve body portion 321, and the valve body portion 321 is used to connect with the piston body 31, for example, see Figure 2The valve body 321 can be connected to the piston body 31 through a connector 3216, and the outer wall of the valve body 321 is in sealing contact with the inner wall of the cylinder 10. The channel 33 includes a first channel 331 located on the valve body 321 and a second channel 332 located on the piston body 31, and the first channel 331 and the second channel 332 are suitable for communication. The valve core 322 is connected to the piston rod 20, and the valve core 322 is movably arranged in the cylinder 10 along the axial direction of the cylinder 10 to close or open the first channel 331.

[0051] By moving the valve core 322 axially on the cylinder body 10, the valve 32 can be switched between the first working mode and the second working mode as required to meet the working requirements of the shock absorber 100. For example, when the second working mode is required, the valve core 322 can be placed in a position to close the first channel 331, so that the oil cannot flow between the first chamber 11 and the second chamber 12, so that the piston 30 can be axially locked in the cylinder body 10.

[0052] like Figure 2 and Figure 3 As shown, the valve body 321 may be provided with a valve port 3211, the valve port 3211 is used to connect the first hole 331 and the second hole 332, and the valve core 322 is provided with a ejector pin 3221, the ejector pin 3221 is used to cooperate with the valve port 3211 to adjust the opening of the valve port 3211. By adjusting the position of the ejector pin 3221 of the valve core 322 in the axial direction of the cylinder body 10, the flow area between the ejector pin 3221 and the valve port 3211 can be adjusted, so that the opening of the valve port 3211 can be adjusted, and then the damping of the shock absorber 100 can be adjusted.

[0053] In order to achieve the reliability of the cooperation between the ejector pin 3221 and the valve port 3211, as an optional embodiment, see Figure 3 The ejector pin 3221 can be a frustum-shaped ejector pin 3221, and the valve port 3211 can be a conical hole. In this way, when the ejector pin 3221 cooperates with the valve port 3211, it is convenient for the ejector pin 3221 to be smoothly inserted into the valve port 3211, and it is also convenient for the outer wall of the ejector pin 3221 to contact the inner wall of the valve port 3211, which can improve the reliability of the ejector pin 3221 closing the valve port 3211.

[0054] In the present disclosure, any appropriate method may be used to realize that the valve core 32 is movably arranged in the cylinder body 10, and the present disclosure is not limited to this. Figure 2 , Figure 4 and Figure 5As shown, in one embodiment of the present disclosure, the valve 32 also includes a coil assembly 323 and an elastic member 324, one end of the coil assembly 323 is connected to the piston rod 20, and the other end of the coil assembly 323 is connected to the valve core portion 322 through the elastic member 324, the elastic member 324 is used to provide elastic force so that the valve core portion 322 remains in a position to open the first channel 331 and the valve port 3211, and the coil assembly 323 is used to provide a magnetic field force so that the valve core portion 322 can overcome the elastic force and close the first channel 331 and the valve port 3211.

[0055] By energizing the coil in the coil assembly 323, the coil can generate a magnetic field, thereby generating a magnetic field force, driving the valve core 322 to move, so as to close the first channel 331, and realize the axial locking of the piston 30, or driving the valve core 322 to move to adjust the opening (including opening or closing) of the valve port 3211, so as to adjust the damping of the shock absorber 100. In the process of adjusting the opening of the valve port 3211, the axial distance between the ejector pin 3221 of the valve core 32 and the valve port 3211 can be adjusted by adjusting the magnitude of the current or voltage supplied to the coil, so as to adjust the opening of the valve port 3211.

[0056] See also Figure 2 The coil assembly 323 may include a coil (not shown) and a cylindrical base 3231, and the coil may be wound around the cylindrical base 3231, wherein the coil may be electrically connected to a power supply (not shown) via a wiring harness, one end of the cylindrical base 3231 is connected to the piston rod 20, and the other end of the cylindrical base 3231 forms an open end, and one end of the elastic member 324 extends into the interior of the cylindrical base 3231 through the open end and is connected to the inner wall of the cylindrical base 3231, so that the coil assembly 323 can generate a magnetic field force through the coil, and the cylindrical base 3231 can be used as a mounting base to mount the coil and the valve core portion 322.

[0057] like Figure 2 and Figure 3As shown, in one embodiment of the present disclosure, the first channel 331 may include a first sub-channel 3311 and a second sub-channel 3312 arranged along the axial direction of the cylinder body 10, and a first cavity 3212 is formed in the valve body portion 321, and the first cavity 3212 is used to connect the first sub-channel 3311 with the second sub-channel 3312, and the first cavity 3212 includes a first limiting surface 3213, and the first limiting surface 3213 is arranged around the first opening of the first sub-channel 3311, and the first opening is an opening connecting the first sub-channel 3311 and the first cavity 3212. The valve core portion 322 includes a valve core body 3222 and an annular protrusion 3223 formed on the outer side wall of the valve core body 3222. The annular protrusion 3223 can be accommodated in the first cavity 3212. The annular protrusion 3223 has a first end face 3224 and a second end face 3225 relative to each other. The annular protrusion 3223 is provided with a through hole 3226 with two ends extending to the first end face 3224 and the second end face 3225 respectively. Along the axial direction of the cylinder body 10, the projection of the through hole 3226 is located on the first limiting surface 3213, that is, in the radial direction of the cylinder body 10, the minimum distance between the first limiting surface 3213 and the valve core body 3222 is less than the minimum distance between the through hole 3226 and the valve core body 3222.

[0058] Based on this, when the vehicle is in normal operating conditions such as normal driving, the axial position of the valve core 322 in the first cavity 3212 can be controlled so that the first sub-channel 3311 and the second sub-channel 3312 can be connected through the through hole 3226. At this time, the oil can flow between the first chamber 11 and the second chamber 12. For example, see Figure 2 and Figure 3 When the shock absorber 100 is in a compression state, the oil in the second chamber 12 can pass through the second channel 332 (such as the third sub-channel 3321) on the piston 30 body, and then continue to pass through the valve port 3211, the second sub-channel 3312, the through hole 3226 on the annular protrusion 3223, the first sub-channel 3311 and enter the first chamber 11. The oil generates compression damping during the flow process. Similarly, see Figure 2 and Figure 3 When the shock absorber 100 is in rebound working condition, the oil in the first chamber 11 can flow into the second chamber 12 through the first sub-channel 3311, the through hole 3226 on the annular protrusion 3223, and the second channel 332 (such as the fourth sub-channel 3322) on the piston body 31 in sequence, and rebound damping is generated during the flow of the oil.

[0059] Furthermore, since the projection of the through hole 3226 along the axial direction of the cylinder body 10 is located on the first limiting surface 3213, the valve core portion 322 is movable in the axial direction of the cylinder body 10. Therefore, by adjusting the position of the valve core portion 322 in the axial direction of the cylinder body 10, the valve core portion 322 can have the first position, see Figure 3and Figure 4 In the first position, the first end surface 3224 abuts against the first limiting surface 3213 , and the first limiting surface 3213 blocks the through hole 3226 .

[0060] In the first position, the valve core 32 can cut off the first sub-channel 3311 and the first cavity 3212, thereby cutting off the first chamber 11 and the second chamber 12. Since the oil cannot flow between the first chamber 11 and the second chamber 12, it is beneficial to lock the axial position of the piston 30. In particular, when the shock absorber 100 is in a compression state, see Figure 4 , Figure 4 The arrows roughly indicate the flow path of the oil. The oil from the second chamber 12 provides an upward auxiliary force to the annular protrusion, which helps to keep the annular protrusion 3223 in the position of cutting off the first sub-channel 3311 and the first cavity 3212, and can improve the reliability of the axial locking of the piston 30, thereby improving the reliability of the shock absorber 100 in supporting the vehicle.

[0061] like Figure 3 and Figure 5 As shown, the first cavity 3212 may further include a second limiting surface 3214, and the second limiting surface 3214 is arranged around the second opening of the second sub-channel 3312, and the second opening is an opening that connects the second sub-channel 3312 with the first cavity 3212, and the projection of the through hole 3226 along the axial direction of the cylinder body 10 is located on the second limiting surface 3214. Similarly, since the projection of the through hole 3226 along the axial direction of the cylinder body 10 is located on the second limiting surface 3214, the valve core part 322 is movable in the axial direction of the cylinder body 10, and therefore, by adjusting the position of the valve core part 322 in the axial direction of the cylinder body 10, the valve core part 322 can have a second position, and in the second position, see Figure 4 and Figure 5 The second end surface 3225 abuts against the second limiting surface 3214 , and the second limiting surface 3214 blocks the through hole 3226 .

[0062] In the second position, the valve core 322 can cut off the first cavity 3212 and the second sub-channel 3312, thereby cutting off the first chamber 11 and the second chamber 12, which is conducive to locking the axial position of the piston 30. In particular, when the shock absorber 100 is in the rebound working state, see Figure 5 , Figure 5 The arrows roughly indicate the flow path of the oil. The oil from the first chamber 11 provides a downward auxiliary force to the annular protrusion, which helps to keep the annular protrusion 3223 in the position of cutting off the second sub-channel 3312 and the first cavity 3212, and can improve the reliability of the axial locking of the piston 30, thereby improving the reliability of the shock absorber 100 in supporting the vehicle.

[0063] In the related art, when a vehicle needs to change tires, the shock absorber 100 needs to reach the lowering limit before the tire can be removed and installed, which is inefficient and the mechanical lifting mechanism is labor-intensive.

[0064] In the shock absorber 100 provided in the present disclosure, since the shock absorber 100 and the elastic element 200 are connected in parallel between the vehicle body 300 and the wheel 400, when the shock absorber 100 is in a rebound condition, the axial position of the piston 30 is locked at this time, which can offset the rebound force of the elastic element 200. In this case, when the jack is kept lifted, since the suspension stroke (locked) remains unchanged, compared with the solution in the related art in which the shock absorber 100 needs to reach the downward adjustment limit before the wheel 400 can be replaced due to the rebound force of the elastic element 200, the solution provided in the present disclosure can offset the downward rebound force of the elastic element 200, and the jack can quickly support the vehicle body 300, so that the tire can be lifted off the ground, and the tire can be quickly disassembled and installed, which can improve the efficiency of tire replacement.

[0065] In order to improve the reliability of the piston 30 when locked in the cylinder 10, as shown in FIG. Figures 3 to 5 As shown, the outer wall of the valve body 321 is provided with a mounting groove 3215, and the valve 32 further includes a sealing ring 70, which is arranged in the mounting groove 3215 and is used for sealing contact with the inner wall of the cylinder body 10, wherein the mounting groove 3215 is communicated with the first cavity 3212, for example, see Figure 3 and Figure 4 The mounting groove 3215 can be connected to the first cavity 3212 through the connecting hole 3219, so that the mounting groove 3215 can be connected to the second chamber 12 when the first end face 3224 of the annular protrusion 3223 abuts against the first abutting surface, or the mounting groove 3215 can be connected to the first chamber 11 when the second end face 3225 of the annular protrusion 3223 abuts against the second abutting surface.

[0066] Based on this, see Figure 3 and Figure 4When the valve core 32 moves to the point where the first end surface 3224 of the annular protrusion 3223 abuts against the first limiting surface 3213, that is, when it is in the first position, the through hole 3226 on the annular protrusion 3223 is blocked by the first limiting surface 3213, and the oil cannot flow between the first chamber 11 and the second chamber 12. At this time, the second chamber 12 can be connected to the installation groove 3215 through the second channel 332 on the piston body 31, the second sub-channel 3312 on the valve body 321, and the first cavity 3212. If the shock absorber 100 is in a compression condition at this time, the oil pressure entering the installation groove 3215 from the second chamber 12 through the first cavity 3212 will apply pressure to the sealing ring 70, pressing the sealing ring 70 against the inner wall of the cylinder body 10, ensuring the sealing reliability of the sealing ring 70, thereby improving the reliability of the overall axial locking of the piston 30, and thus improving the reliability of the shock absorber 100 supporting the vehicle body 300. Under this condition, the vehicle can be repaired.

[0067] See also Figure 3 and Figure 5 When the valve core 32 moves to the point where the second end face 3225 of the annular protrusion 3223 abuts against the second limiting surface 3214, that is, when it is in the second position, the through hole 3226 on the annular protrusion 3223 is blocked by the second limiting surface 3214, and the oil cannot flow between the first chamber 11 and the second chamber 12. At this time, the first chamber 11 can be connected to the installation groove 3215 through the first sub-channel 3311 on the valve body 32 and the first cavity 3212 of the valve body 32. If the shock absorber 100 is in the rebound working condition at this time, the oil pressure entering the installation groove 3215 from the first chamber 11 through the first cavity 3212 will apply pressure to the sealing ring 70, pressing the sealing ring 70 against the inner wall of the cylinder body 10, ensuring the sealing reliability of the sealing ring 70, thereby improving the reliability of the overall axial locking of the piston 30, and thus improving the reliability of the shock absorber 100 supporting the vehicle body 300. Under this condition, the wheel 400 can be replaced.

[0068] In the present disclosure, the valve body 321 can be connected to the piston body 31 using any appropriate structure, as long as a reliable connection between the two can be achieved. Figure 2 and Figure 3 As shown, in one embodiment of the present disclosure, the valve body 321 may include a connector 3216, which is used to connect to the piston body 31, wherein the valve port 3211 is formed on the connector 3216. The valve port 3211 is arranged on the connector 3216 for easy processing.

[0069] Alternatively, if Figure 3 and Figure 5As shown, a second cavity 40 is formed between the end surfaces of the connecting member 3216 and the piston body 31 facing each other, and the valve port 3211 is connected to the second channel 332 through the second cavity 40. By providing the second cavity 40, when the second channel 332 on the piston body 31 includes a plurality of sub-channels 33 (for example, including Figure 5 When the third sub-channel 3321 and the fourth sub-channel 3322 are connected, the plurality of sub-channels 33 of the second channel 332 can share the second cavity 40 and be connected to the first channel 331, which is conducive to simplifying the structure and facilitating the arrangement of other components. For example, see Figure 5 , convenient for accommodating the first valve disc 50 and installing the first valve disc 50 and the second valve disc 60 on the bolt structure on the valve body 32 .

[0070] The specific shape of the connector 3216 disclosed in the present invention is not limited. Figures 3 to 5 As shown, in one embodiment of the present disclosure, the connecting member 3216 may include a first cylindrical portion and a second cylindrical portion, the first cylindrical portion includes a first end plate 32161 and a first barrel section 32162 formed on the periphery of the first end plate 32161, the valve port 3211 is arranged on the first end plate 32161, the second cylindrical portion includes a second end plate 32163 and a second barrel section 32164 formed on the periphery of the second end plate 32163, the second end plate 32163 is configured as a flange extending outward from the first end of the first barrel section 32162, the first end is an end of the first barrel section 32162 away from the first end plate 32161, and the second barrel section 32164 is used to be sleeved and connected with the annular mounting portion 311 on the piston body 31. With such a design, the valve body 321 and the piston body 31 can be connected as one body, and the above-mentioned second cavity 40 can also be constructed.

[0071] Optionally, in order to improve the reliability of the connection between the connecting piece 3216 and the piston body 31, the second barrel section 32164 and the annular mounting portion 311 on the piston body 31 can be sleeved and connected by welding on the basis of the sleeve.

[0072] like Figure 5 As shown, the second channel 332 may include a third sub-channel 3321 and a fourth sub-channel 3322, wherein both ends of the third sub-channel 3321 extend to the two axial end surfaces of the piston body 31 respectively, and both ends of the fourth sub-channel 3322 extend to the two axial end surfaces of the piston body 31 respectively.

[0073] like Figure 5As shown, the valve 32 may further include a first valve plate 50, which is disposed on the axial end face of the piston body 31 close to the valve body portion 321, that is, the first end face 3224 of the piston body 31, and a first shielding portion 51 is disposed on the first valve plate 50, which is suitable for covering the opening of the third sub-channel 3321 on the first end face 3224, and the first shielding portion 51 is configured to open the opening of the third sub-channel 3321 under the action of oil when the piston 30 performs a compression stroke. By providing the first valve plate 50, a buffering effect can be played on the oil from the second chamber 12 when the shock absorber 100 performs a compression condition.

[0074] like Figure 5 As shown, the valve 32 may further include a second valve disc 60, which is disposed on the axial end face of the piston body 31 away from the valve body portion 321, that is, the second end face 3225 of the piston body 31, and a second shielding portion 61 is disposed on the second valve disc 60, which is suitable for covering the opening of the fourth sub-channel 3322 on the second end face 3225, and the second shielding portion 61 is configured to open the opening of the fourth sub-channel 3322 under the action of oil when the piston 30 performs a rebound stroke. By providing the second valve disc 60, a buffering effect can be played on the oil from the first chamber 11 when the shock absorber 100 performs a rebound condition.

[0075] like Figure 5 As shown, optionally, the first valve plate 50 and the second valve plate 60 can be fixed to the piston body 31 by using fasteners 80 (such as bolts).

[0076] like Figure 2 As shown, the shock absorber 100 also includes a limit block 90, which is arranged in the cylinder body 10 and is used to limit the compression stroke of the piston rod 20. By limiting the compression stroke, the piston 30 can be prevented from exceeding the downward jump stroke during the compression process, which is conducive to ensuring the reliability of the shock absorber 100.

[0077] The present disclosure does not limit the specific structure of the limit block 90. ​​For example, a stop groove may be provided on one of the limit block 90 and the piston rod 20, and a stop protrusion cooperating with the stop groove may be provided on the other. Through the action of the stop protrusion and the stop groove, axial limitation of the piston rod 20 can be achieved, thereby achieving axial limitation of the piston 30.

[0078] It is understandable that, in the present disclosure, the shock absorber 100 may be a single-cylinder shock absorber or a multi-cylinder shock absorber, and the present disclosure does not limit this. Figure 2 As shown, the cylinder body 10 includes an inner cylinder body 101 and an outer cylinder body 102 .

[0079] See also Figure 6According to one aspect of the present disclosure, a method for controlling a shock absorber 100 is provided. The method is applied to the shock absorber 100 described above. The method may include step S101:

[0080] When the shock absorber 100 locking instruction is obtained, the shock absorber 100 is controlled to be in the second working mode, that is, the valve 32 closes the channel 33 on the piston body 31 connecting the first chamber 11 and the second chamber 12, so that the piston 30 is axially locked in the cylinder 10, so that the stroke of the shock absorber 100 is locked, forming a rigid part, and realizing effective support for the vehicle body 300. In this way, the vehicle can be repaired and replaced, or the vehicle can continue to travel to the maintenance point.

[0081] Among them, the locking command of the shock absorber 100 can be a locking command generated according to the state information of the suspension detected by the sensor 520. The sensor 520 is used to detect the state information of the suspension, which is convenient for automatically controlling the shock absorber 100 to switch between the first working mode and the second working mode according to the detection result of the sensor 520, thereby facilitating timely locking of the stroke of the shock absorber 100.

[0082] In addition to using the sensor 520 to detect the state of the suspension, the locking instruction of the shock absorber 100 can also be generated according to the operation of the operator. For example, the operator can generate the locking instruction by operating a locking button on the vehicle or inputting the locking instruction through an information input module.

[0083] Among them, the sensor 520 may include but is not limited to a stroke sensor (i.e., position sensor) or an acceleration sensor. The stroke sensor may be used to detect the stroke of the shock absorber 100, so as to determine whether the stroke of the shock absorber 100 is within a preset range, thereby determining whether the height of the suspension is within a preset range, and then determining whether the elastic element 200 of the suspension is working properly, because if the elastic element 200 is damaged, the stroke of the shock absorber 100 will be abnormal, and the height of the suspension has been abnormal. The acceleration sensor may detect the acceleration of the suspension, thereby determining whether the acceleration of the suspension is within a preset range, and then determining whether the elastic element 200 of the suspension is working properly, because if the elastic element 200 is damaged, the acceleration of the suspension will be abnormal, and the height of the suspension will also be abnormal. In addition, detecting the acceleration of the suspension is also conducive to determining the working condition of the suspension, for example, determining whether the suspension is in a compression condition or a rebound condition.

[0084] Optionally, the state information of the suspension includes but is not limited to the travel, position height or acceleration of the suspension. Figures 1 to 5 In the shock absorber 100 shown, the step of controlling the shock absorber 100 to be in the second working mode may include:

[0085] According to the working condition of the shock absorber 100 (such as according to Figure 4 The compression condition shown or Figure 5 In the rebound working condition shown in the figure), the first end face 3224 of the annular protrusion 3223 is controlled to abut against the first limit surface 3213, or the second end face 3225 of the annular protrusion 3223 is controlled to abut against the second limit surface 3214. That is, when the shock absorber 100 is in the compression working condition, the first end face 3224 of the annular protrusion 3223 can be controlled to abut against the first limit surface 3213, and when the shock absorber 100 is in the rebound working condition, the second end face 3225 of the annular protrusion 3223 is controlled to abut against the second limit surface 3214.

[0086] When one end face of the control annular protrusion 3223 is abutted against the first limiting surface 3213, the first limiting surface 3213 blocks the through hole 3226 on the annular protrusion 3223, and the oil from the second chamber 12 provides an upward auxiliary force to the annular protrusion, which helps to keep the annular protrusion 3223 at the position of cutting off the first sub-channel 3311 and the first cavity 3212, which can improve the reliability of the axial locking of the piston 30, thereby improving the reliability of the shock absorber 100 in supporting the vehicle. At this time, the shock absorber 100 enters the compression locking mode.

[0087] When the second end face 3225 of the control annular protrusion 3223 is abutted against the second limiting surface 3214, the second limiting surface 3214 blocks the through hole 3226 on the annular protrusion 3223, and the oil from the first chamber 11 provides a downward auxiliary force to the annular protrusion, which helps the annular protrusion 3223 to remain at the position of cutting off the second sub-channel 3312 and the first cavity 3212, which can improve the reliability of the axial locking of the piston 30, thereby improving the reliability of the shock absorber 100 in supporting the vehicle. At this time, the shock absorber 100 enters the rebound locking mode.

[0088] When doing specific operations, Figures 2 to 4 Taking the shock absorber 100 shown in the figure as an example, when it is detected that the elastic element 200 has a fault, the coil can be energized, and the coil generates a magnetic field force toward the upper side, so that the valve core portion 322 moves upward in the axial direction of the cylinder body 10 until the first end surface 3224 of the annular protrusion 3223 abuts against the first limiting surface 3213, and the through hole 3226 on the annular protrusion 3223 is blocked, as shown in FIG. Figure 4As shown, the oil cannot flow between the first chamber 11 and the second chamber 12. Moreover, during the compression process, a portion of the oil from the second chamber 12 presses the annular protrusion 3223 against the first limiting surface 3213, ensuring the reliability of the annular protrusion 3223 closing the first sub-channel 3311. In addition, a portion of the oil from the second chamber 12 flows into the mounting groove 3215 through the first cavity 3212, exerting pressure on the sealing ring 70, so that the sealing ring 70 is pressed against the inner wall of the cylinder body 10 to achieve sealing, so that the oil cannot flow. In this way, the reliability of the axial locking of the piston 30 can be guaranteed, and the weight of the vehicle body 300 can be supported, which is conducive to the normal driving of the vehicle to the maintenance point.

[0089] See also Figure 2 , Figure 3 and Figure 5 When maintenance or quick tire change is required, the coil can be passed with a current opposite to the above mode, and the coil generates a magnetic field force toward the bottom, so that the valve core 322 moves downward in the axial direction of the cylinder body 10 until the second end surface 3225 of the annular protrusion 3223 abuts against the second limiting surface 3214, and the through hole 3226 on the annular protrusion 3223 is blocked. Figure 5 As shown, the oil cannot flow between the first chamber 11 and the second chamber 12. Moreover, during the rebound process, a part of the oil from the first chamber 11 presses the annular protrusion 3223 against the second limiting surface 3214, ensuring the reliability of the annular protrusion 3223 closing the second sub-channel 3312. In addition, a part of the oil from the first chamber 11 flows into the installation groove 3215 through the first cavity 3212, exerting pressure on the sealing ring 70, so that the sealing ring 70 is pressed against the inner wall of the cylinder body 10 to achieve sealing, so that the oil cannot flow, thereby generating a large force, which can offset the spring rebound force and keep the suspension stroke unchanged when the jack is lifted, so that the tire can be quickly lifted off the ground and the tire can be disassembled and replaced. After the replacement and maintenance are completed, the coil can be controlled to lose power, the piston 30 can be unlocked, and the vehicle can then drive normally.

[0090] According to a third aspect of the present disclosure, an electronic device 500 is provided, the electronic device 500 comprising a memory and a processor 510, the memory storing a computer program, the processor 510 being used to execute the computer program to implement the above-mentioned control method of the shock absorber 100. The electronic device 500 may be an on-board computer or an ECU (Electronic Control Unit), etc.

[0091] In addition, the electronic device 500 may further include the above-mentioned sensor 520 , and the sensor 520 may be electrically connected to the processor 510 . The processor 510 may control the operation of the shock absorber 100 in a timely manner according to the state information of the suspension detected by the sensor 520 .

[0092] The processor 510 may include a compression locking module and a rebound locking module, the compression locking module is used to control the shock absorber 100 to implement the above-mentioned compression locking mode, and the rebound locking module is used to control the shock absorber 100 to implement the above-mentioned rebound locking mode.

[0093] According to another aspect of the present disclosure, a suspension is provided. The suspension includes the shock absorber 100 described above. The shock absorber 100 is used to be connected between a vehicle body 300 and a wheel 400 of a vehicle.

[0094] The suspension may also include: Figure 1 The elastic element 200 shown (such as a coil spring, a leaf spring or a gas spring, etc.), the elastic element 200 and the shock absorber 100 can be connected in parallel between the vehicle body 300 and the wheel 400.

[0095] According to another aspect of the present disclosure, a vehicle is provided, the vehicle comprising the above suspension, and the vehicle includes but is not limited to a pure electric vehicle, a hybrid vehicle or a fuel vehicle.

[0096] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the present disclosure. The present disclosure is intended to cover any variations, uses or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present disclosure are indicated by the claims.

[0097] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A shock absorber, characterized in that: It comprises a cylinder body, a piston rod and a piston connected to the piston rod, The piston is disposed in the cylinder body and divides the interior of the cylinder body into a first chamber and a second chamber, and a hole connecting the first chamber and the second chamber is disposed on the piston; The piston comprises a piston body and a valve connected to each other, wherein the valve is used to open or close the channel so that the shock absorber can have a first working mode and a second working mode; In the first working mode, the valve opens the orifice; In the second operating mode, the valve closes the orifice to enable the piston to be axially locked in the cylinder.

2. The shock absorber according to claim 1, characterized in that: The piston body and the valve are arranged along the axial direction of the cylinder body, the valve comprises a valve core portion and a valve body portion, the valve body portion is used to be connected to the piston body, and the outer side wall of the valve body portion is in sealing contact with the inner wall of the cylinder body; The holes include a first hole located on the valve body and a second hole located on the piston body; The valve core part is connected to the piston rod, and the valve core part is movably arranged in the cylinder body along the axial direction of the cylinder body to close or open the first channel.

3. The shock absorber according to claim 2, characterized in that: The valve body is provided with a valve port, which is used to connect the first channel with the second channel. The valve core is provided with a ejector pin, which is used to cooperate with the valve port to adjust the opening of the valve port.

4. The vibration absorber according to claim 3, characterized in that: The valve also includes a coil assembly and an elastic member; One end of the coil assembly is connected to the piston rod, and the other end of the coil assembly is connected to the valve core portion through the elastic member; The elastic member is used to provide elastic force so that the valve core portion is kept at a position where the first channel and the valve port are opened; The coil assembly is used to provide a magnetic field force so that the valve core portion can overcome the elastic force to close the first channel and the valve port.

5. The shock absorber according to claim 4, characterized in that The coil assembly comprises a coil and a cylindrical substrate; The coil is wound on a cylindrical base, one end of which is connected to the piston rod, and the other end of which forms an open end. One end of the elastic member extends into the interior of the cylindrical base through the open end and is connected to the inner wall of the cylindrical base.

6. The vibration absorber according to any one of claims 2 to 5, characterized in that: The first channel includes a first sub-channel and a second sub-channel arranged along the axial direction of the cylinder body, and a first cavity is formed in the valve body portion, and the first cavity is used to connect the first sub-channel with the second sub-channel; The first cavity comprises a first limiting surface, the first limiting surface is arranged around a first opening of the first sub-channel, and the first opening is an opening connecting the first sub-channel and the first cavity; The valve core portion includes a valve core body and an annular protrusion formed on an outer side wall of the valve core body, wherein the annular protrusion has a first end face and a second end face opposite to each other, and the annular protrusion is provided with a through hole with two ends extending to the first end face and the second end face respectively; Along the axial direction of the cylinder body, the projection of the through hole is located on the first limiting surface.

7. The shock absorber according to claim 6, characterized in that The first cavity further includes a second limiting surface, the second limiting surface is arranged around a second opening of the second sub-channel, and the second opening is an opening connecting the second sub-channel and the first cavity; Along the axial direction of the cylinder body, the projection of the through hole is located on the second limiting surface.

8. The shock absorber according to claim 7, characterized in that The outer wall of the valve body is provided with a mounting groove, and the valve further comprises a sealing ring, which is arranged in the mounting groove and is used for sealing contact with the inner wall of the cylinder body; Wherein, the installation groove is connected to the first cavity, so that the installation groove can be connected to the second chamber when the first end surface abuts against the first limiting surface, and can be connected to the first chamber when the second end surface abuts against the second limiting surface.

9. The vibration absorber according to any one of claims 3 to 5, characterized in that: The valve body portion includes a connecting piece, the connecting piece is used to be connected to the piston body, and the valve port is formed on the connecting piece.

10. The vibration absorber according to claim 9, characterized in that In the axial direction of the cylinder body, a second cavity is formed between the end surfaces of the connecting member and the piston body facing each other, and the valve port is communicated with the second channel through the second cavity.

11. The shock absorber according to claim 10, characterized in that The connecting member includes a first cylindrical portion and a second cylindrical portion; The first cylindrical portion includes a first end plate and a first cylinder section formed on the periphery of the first end plate, and the valve port is arranged on the first end plate; The second cylindrical portion includes a second end plate and a second barrel section formed on the periphery of the second end plate, the second end plate is configured as a flange extending outward from a first end of the first barrel section, the first end being an end of the first barrel section away from the first end plate; The second barrel section is used for sleeve connection with the annular mounting portion on the piston body.

12. A shock absorber control method, characterized in that: The method is applied to the shock absorber according to claim 1, the method comprising: When the shock absorber locking instruction is obtained, the shock absorber is controlled to be in the second working mode.

13. The shock absorber control method according to claim 12, characterized in that: The method is applied to the shock absorber according to claim 7, wherein controlling the shock absorber to be in the second working mode comprises: According to the working condition of the shock absorber, the first end face of the annular protrusion is controlled to abut against the first limiting surface, or the second end face of the annular protrusion is controlled to abut against the second limiting surface.

14. The shock absorber control method according to claim 12 or 13, characterized in that: The shock absorber locking command is a locking command generated according to the state information of the suspension detected by the sensor, or, The damper locking command is a locking command generated according to an operation of an operator.

15. The shock absorber control method according to claim 14, characterized in that: The state information of the suspension includes the height and / or acceleration of the suspension.

16. An electronic device, characterized in that: The device comprises a memory and a processor, wherein the memory stores a computer program, and the processor is used to execute the computer program to implement the shock absorber control method according to any one of claims 12 to 15.

17. A suspension, characterized in that: The invention comprises a shock absorber according to any one of claims 1 to 11, wherein the shock absorber is used to be connected between a body and a wheel of a vehicle.

18. A vehicle, characterized in that: include: The suspension according to claim 17; or, The electronic device according to claim 16; or A shock absorber according to any one of claims 1-11.

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