Pilot valve for shock absorber, shock absorber and vehicle

Abstract

The invention discloses a pilot valve for a shock absorber, the shock absorber and a vehicle, the pilot valve comprises a body part, the body part is suitable for being connected with a valve element assembly of the shock absorber, and the body part is suitable for being matched with a flow regulating valve of the shock absorber; the flow guide part extends in the circumferential direction of the body part, and the flow guide part extends from the outer periphery of the body part to the side close to the flow adjusting valve. According to the pilot valve provided by the embodiment of the invention, the flow guide part can be used for stopping and guiding the fluid, so that the flowing speed of the fluid flowing from the recovery cavity to the compression cavity is increased, the fluid flows more stably, and the damping force of the shock absorber is more stable.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS This application claims priority to Chinese patent application No. "202411402669.3" filed by BYD Co., Ltd. on September 30, 2024, entitled "Shock Absorber and Vehicle". Technical Field

[0002] The present invention relates to the technical field of vehicles, and in particular to a pilot valve for a shock absorber, a shock absorber and a vehicle. Background Art

[0003] The shock absorber in the related art is usually provided with a valve core assembly, a pilot valve and a flow regulating valve. The valve core assembly can cooperate with the flow regulating valve through the pilot valve to control the flow regulating valve, thereby adjusting the fluid flow between the compression chamber and the recovery chamber.

[0004] However, due to the unreasonable structural setting of the pilot valve in the related technology, when the pilot valve is opened, the fluid will flow out of the flow regulating valve and flow to the pilot valve. Under the stop of the pilot valve, the fluid will flow outward along the radial direction of the pilot valve. The pilot valve cannot effectively guide the fluid, and the guiding effect is poor, which will affect the fluid flow rate in the shock absorber. Summary of the invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the present invention is to provide a pilot valve for a shock absorber, which can use a guide part to stop and guide the fluid, which is conducive to increasing the flow speed of the fluid flowing from the recovery chamber to the compression chamber, and makes the fluid flow more stable, and the damping force of the shock absorber is more stable.

[0006] The present invention also provides a shock absorber having the pilot valve.

[0007] The present invention also provides a vehicle having the shock absorber.

[0008] In order to achieve the above-mentioned purpose, according to a first aspect of the present invention, a pilot valve for a shock absorber is proposed, comprising: a main body portion, the main body portion is suitable for being connected to a valve core assembly of the shock absorber, and the main body portion is suitable for cooperating with a flow regulating valve of the shock absorber; a guide portion, the guide portion extends along the circumference of the main body portion, and the guide portion extends from the outer periphery of the main body portion to a side close to the flow regulating valve.

[0009] The pilot valve according to the embodiment of the present invention can use the guide part to stop and guide the fluid, which is beneficial to increase the flow speed of the fluid flowing from the recovery chamber to the compression chamber, and makes the fluid flow more stable and the damping force of the shock absorber more stable.

[0010] According to some embodiments of the present invention, the main body is provided with a sealing protrusion, the sealing protrusion protrudes from a side of the main body facing the flow regulating valve, and the sealing protrusion cooperates with the flow regulating valve.

[0011] According to some embodiments of the present invention, the main body is further provided with a main body balancing hole, which penetrates the main body along the axial direction of the pilot valve and is located between the guide portion and the sealing protrusion along the radial direction of the main body.

[0012] According to some embodiments of the present invention, there are a plurality of the body balancing holes, and the plurality of the body balancing holes are arranged at intervals along the circumference of the main body.

[0013] According to some embodiments of the present invention, along the axial direction of the pilot valve, the sealing protrusion protrudes from the guide portion.

[0014] According to some embodiments of the present invention, along the axial direction of the pilot valve extending in a direction away from the main body, the sealing protrusion is configured in a truncated cone shape with a decreasing cross-sectional area.

[0015] According to some embodiments of the present invention, a body flow guide surface is formed between the sealing protrusion and the flow guide portion on a side surface of the body portion facing the flow regulating valve.

[0016] According to some embodiments of the present invention, along the axial direction of the pilot valve extending in a direction away from the main body, the main body guide surface is configured as a truncated conical surface with a decreasing cross-sectional area.

[0017] According to some embodiments of the present invention, the guide portion is configured as a circular ring extending circumferentially along the outer periphery of the main body portion.

[0018] According to some embodiments of the present invention, the main body is further provided with a guide rod connecting groove, the guide rod connecting groove is provided on a side of the main body facing the valve core assembly, and the valve core assembly is connected to the guide rod connecting groove.

[0019] According to a second aspect of the present invention, a shock absorber is provided, the shock absorber comprising: a cylinder; a piston, the piston is movably arranged on the cylinder, and the piston separates a compression chamber and a recovery chamber in the cylinder; a flow regulating valve, the flow regulating valve is arranged in the piston and is respectively connected with the compression chamber and the recovery chamber; a control valve, the control valve comprises a valve core assembly and a pilot valve according to the first aspect of the present invention, the valve core assembly is arranged on the piston, the pilot valve is connected to the valve core assembly, and the valve core assembly controls the flow regulating valve through the pilot valve to adjust the fluid flow between the compression chamber and the recovery chamber.

[0020] The shock absorber described in the second aspect embodiment of the present invention, by utilizing the pilot valve described in the first aspect embodiment of the present invention, can utilize the guide part to stop and guide the fluid, which is beneficial to increase the flow speed of the fluid flowing from the recovery chamber to the compression chamber, and makes the fluid flow more stable, and the damping force of the shock absorber is more stable.

[0021] According to some embodiments of the present invention, the flow regulating valve includes an overflow valve body, the overflow valve body is provided with a first valve body flow channel and a second valve body flow channel, the first valve body flow channel is connected to the recovery chamber, and the second valve body flow channel is connected to the compression chamber; wherein, the sealing protrusion of the pilot valve cooperates with the first valve body flow channel to control the opening and closing of the first valve body flow channel and the second valve body flow channel.

[0022] According to some embodiments of the present invention, the inner diameter of the end of the first flow channel of the valve body facing the pilot valve is d1, the inner diameter of the guide portion is d2; the angle between the radial outer side of the sealing protrusion and the axial direction of the pilot valve is ; Along the axial direction of the pilot valve, the length of the guide portion exceeding the main body portion in the direction close to the relief valve body is h; wherein h, d1, d2 and Satisfy: h .

[0023] According to some embodiments of the present invention, a projection of the main body portion on the relief valve body along the axial direction of the cylinder at least covers a portion of the second flow channel of the valve body.

[0024] According to some embodiments of the present invention, the piston includes: a piston rod; a piston valve assembly, the piston valve assembly separates the compression chamber and the recovery chamber in the cylinder; a valve body, the piston valve assembly and the piston rod are connected through the valve body, the flow regulating valve is installed in the valve body, and the pilot valve extends into the valve body and cooperates with the flow regulating valve.

[0025] According to some embodiments of the present invention, the overflow valve body is movably disposed in the valve body, and the overflow valve body and the valve body define a first chamber and a second chamber; wherein, one end of the first flow channel of the valve body is connected to the recovery chamber through the first chamber, the other end of the first flow channel of the valve body is connected to the second chamber and the pilot valve is matched with the other end of the first flow channel of the valve body; and one end of the second flow channel of the valve body is connected to the second chamber, and the other end of the second flow channel of the valve body is connected to the compression chamber, and the fluid flow of the first flow channel of the valve body and the fluid flow of the second flow channel of the valve body are controlled by the opening and closing of the pilot valve.

[0026] According to a third aspect of the present invention, a vehicle is provided. The vehicle comprises the shock absorber according to the second aspect of the present invention.

[0027] The vehicle described in the third aspect embodiment of the present invention, by utilizing the shock absorber described in the second aspect embodiment of the present invention, can utilize the guide portion to stop and guide the fluid, which is beneficial to increasing the flow speed of the fluid flowing from the recovery chamber to the compression chamber, and makes the fluid flow more stable, and the damping force of the shock absorber is more stable.

[0028] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which: Figure 1 is a schematic structural diagram of a shock absorber according to an embodiment of the present invention; Figure 2 is a structural schematic diagram of a flow control valve according to an embodiment of the present invention, when the initial position is in an open valve state and the working condition is restored; Figure 3 is a structural schematic diagram of a compression condition when the flow control valve according to an embodiment of the present invention is in an open valve state at an initial position; Figure 4 It is a structural schematic diagram of the flow control valve according to an embodiment of the present invention, when the initial position is in a closed valve state and the working condition is restored; Figure 5 is a structural schematic diagram of a compression condition when the flow control valve according to an embodiment of the present invention is in a closed valve state at an initial position; Figure 6 yes Figure 1 Detailed view of A; Figure 7 is a schematic structural diagram of a pilot valve according to an embodiment of the present invention; Figure 8 is a schematic structural diagram of a pilot valve according to an embodiment of the present invention from another perspective; Fig. 9 is a structural schematic diagram of a pilot valve according to an embodiment of the present invention from another perspective; Fig.10 is a cross-sectional view of a pilot valve according to an embodiment of the present invention; Fig.11 is a schematic structural diagram of a relief valve body according to an embodiment of the present invention; Fig.12 is a cross-sectional view of a relief valve body according to an embodiment of the present invention; Fig.13 It is a schematic diagram of the principle of fluid being stopped and diverted by a pilot valve according to an embodiment of the present invention.

[0030] Reference numerals: 1. Shock absorber; 100, cylinder; 110, inner cylinder; 111, compression chamber; 112, recovery chamber; 120, outer cylinder; 121, liquid storage chamber; 130, bottom valve assembly; 200, piston; 210, piston rod; 220, piston valve assembly; 230, valve body; 241, first chamber; 242, second chamber; 300, flow control valve; 310, overflow valve body; 314, first flow channel of valve body; 314a, radial section; 314b, axial section; 315, second flow channel of valve body; 400, control valve; 500, valve core assembly; 530, guide rod; 600, pilot valve; 610, main body; 611, main body balancing hole; 612, sealing protrusion; 613, main body guide surface; 620, guide part; 639, guide rod connecting groove. DETAILED DESCRIPTION

[0031] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0032] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0033] In the description of the present invention, "first feature" or "second feature" may include one or more of the features.

[0034] In the description of the present invention, "plurality" means two or more than two, and "several" means one or more.

[0035] A vibration absorber 1 according to an embodiment of the present invention will be described below with reference to the drawings.

[0036] like Figure 1-Figure 5 As shown, the shock absorber 1 according to the embodiment of the present invention includes a cylinder 100 , a piston 200 , a flow regulating valve 300 and a control valve 400 .

[0037] The piston 200 is movably disposed on the cylinder 100, and the piston 200 separates a compression chamber 111 and a recovery chamber 112 in the cylinder 100. The flow regulating valve 300 is disposed in the piston 200 and is respectively connected to the compression chamber 111 and the recovery chamber 112. The control valve 400 is disposed on the piston 200. The control valve 400 adjusts the fluid flow between the compression chamber 111 and the recovery chamber 112 by controlling the flow regulating valve 300.

[0038] The compression chamber 111 and the recovery chamber 112 may store fluid, such as fluid with a certain pressure and inert gas.

[0039] Among them, the shock absorber 1 also includes a bottom valve assembly 130, the cylinder 100 includes an outer cylinder 120 and an inner cylinder 110, the inner cylinder 110 extends into the outer cylinder 120, and a liquid storage chamber 121 is formed between the outer cylinder 120 and the inner cylinder 110. The piston 200 is movably arranged in the inner cylinder 110 and separates a compression chamber 111 and a recovery chamber 112 in the inner cylinder 110. The bottom valve assembly 130 is installed on the inner cylinder 110 or the outer cylinder 120, and the fluid in the compression chamber 111 flows into the liquid storage chamber 121 through the bottom valve assembly 130, or the fluid in the liquid storage chamber 121 flows into the compression chamber 111 through the bottom valve assembly 130.

[0040] In the present invention, the flow control valve 300 is in an open valve state at the initial position, which means that the flow control valve 300 is in an open initial state when there is no external pressure squeezing the flow control valve 300 and no fluid flows in the flow control valve 300. Also, the flow control valve 300 is in a closed valve state at the initial position, which means that the flow control valve 300 is squeezed by an external force, and the overflow valve seat 320 and the overflow valve body 310 of the flow control valve 300 are in abutment and closed initial state.

[0041] For example, in some embodiments, when the valve core assembly 500 is energized, it squeezes the flow regulating valve 300. At this time, the flow regulating valve 300 is in an open valve state at the initial position, which means that the valve core assembly 500 is not energized and there is no fluid flowing in the flow regulating valve 300, and the flow regulating valve 300 is in an open initial state. At this time, the flow regulating valve 300 is in a balanced state; and, the flow regulating valve 300 is in a closed valve state at the initial position, which means that the valve core assembly 500 is energized and the overflow valve seat 320 and the overflow valve body 310 of the flow regulating valve 300 are in abutment and closed initial state.

[0042] Alternatively, in other embodiments, the flow regulating valve 300 will be squeezed when the valve core assembly 500 is not energized. At this time, the flow regulating valve 300 is in an open valve state at the initial position, which means that the valve core assembly 500 is energized and there is no fluid flowing in the flow regulating valve 300, and the flow regulating valve 300 is in an open initial state. At this time, the flow regulating valve 300 is in a balanced state; and, the flow regulating valve 300 is in a closed valve state at the initial position, which means that the valve core assembly 500 is not energized and the overflow valve seat 320 and the overflow valve body 310 of the flow regulating valve 300 are in an abutment and closed initial state.

[0043] According to the shock absorber 1 of the embodiment of the present invention, the piston 200 is movably arranged on the cylinder 100, and the piston 200 separates the compression chamber 111 and the recovery chamber 112 in the cylinder 100. The flow regulating valve 300 is arranged on the piston 200 and is connected to the compression chamber 111 and the recovery chamber 112 respectively.

[0044] In this way, when the shock absorber 1 is in a compression condition, the piston 200 compresses the volume of the compression chamber 111, and the volume of the recovery chamber 112 will increase accordingly. At this time, the fluid in the compression chamber 111 will flow to the recovery chamber 112 through the flow regulating valve 300, and when the shock absorber 1 is in a recovery condition, the piston 200 compresses the volume of the recovery chamber 112, and the volume of the compression chamber 111 will increase accordingly. At this time, the fluid in the recovery chamber 112 will flow to the compression chamber 111 through the flow regulating valve 300. In the above process, by repeatedly changing the moving direction of the piston 200, the fluid repeatedly flows between the compression chamber 111 and the recovery chamber 112, and the friction between the fluid and the shock absorber 1 generates heat, which can convert the kinetic energy of the piston 200 into the thermal energy of the fluid, thereby reducing the power of the piston 200.

[0045] Therefore, when the cylinder 100 and the piston 200 of the shock absorber 1 are respectively connected to two objects (such as a vehicle frame and a wheel), when one of the two objects vibrates, the vibration force transmitted to the other object can be reduced by the presence of the shock absorber 1, thereby achieving a vibration reduction effect.

[0046] In addition, the control valve 400 is disposed on the piston 200 , and the control valve 400 adjusts the fluid flow between the compression chamber 111 and the recovery chamber 112 by controlling the flow regulating valve 300 .

[0047] In this way, when the piston 200 moves, the control valve 400 can be used to adjust the fluid flow rate flowing back and forth between the compression chamber 111 and the recovery chamber 112 at the same time. When the fluid flow rate flowing through the flow regulating valve 300 is large, the damping force of the shock absorber 1 can be small, that is, the shock absorber 1 can appear "soft", and when the fluid flow rate flowing through the flow regulating valve 300 is small, the damping force of the shock absorber 1 can be large, that is, the shock absorber 1 can appear "hard", and the control valve 400 can continuously adjust the size of the fluid flow rate flowing through the flow regulating valve 300, so that the shock absorber 1 can achieve continuous adjustment of the damping force, which is beneficial to improving the ride comfort and handling stability of the vehicle.

[0048] Moreover, by controlling the flow regulating valve 300 through the control valve 400, the fluid flow structure between the compression chamber 111 and the recovery chamber 112 of the shock absorber 1 is simple, thereby simplifying the adjustment structure of the damping force of the shock absorber 1, so as to facilitate the adjustment of the damping force of the shock absorber 1, and the adjustment is simpler and more convenient.

[0049] In this way, the shock absorber 1 according to the embodiment of the present invention can continuously adjust the damping force by adjusting the fluid flow between the compression chamber 111 and the restoring chamber 112, which is beneficial to improving the riding comfort and the handling performance of the vehicle. In addition, the shock absorber 1 has a simple structure and is easy to adjust.

[0050] The pilot valve 600 according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0051] like Figure 1-Figure 13 As shown, the pilot valve 600 according to the embodiment of the present invention includes a body portion 610 and a flow guide portion 620 .

[0052] The main body 610 is suitable for connecting with the valve core assembly 500 of the shock absorber 1, and the main body 610 is suitable for cooperating with the flow regulating valve 300 of the shock absorber 1, the guide portion 620 extends along the circumference of the main body 610, and the guide portion 620 extends from the outer periphery of the main body 610 to the side close to the flow regulating valve 300.

[0053] The main body 610 in the present invention is the first main body in the priority application, and the guide part 620 in the present invention is the second guide part in the priority application.

[0054] According to the pilot valve 600 of the embodiment of the present invention, by connecting the main body 610 with the valve core assembly 500, when the valve core assembly 500 moves, the valve core assembly 500 can drive the pilot valve 600 to move, or, when the fluid pushes the pilot valve 600 to move in a direction away from the flow control valve 300, the pilot valve 600 can also drive the valve core assembly 500 to move, thereby adjusting the fluid flow of the flow control valve 300.

[0055] Furthermore, the flow guide 620 extends along the circumference of the body 610, and the flow guide 620 extends from the outer peripheral edge of the body 610 to the side close to the flow control valve 300. In this arrangement, when the fluid flows out of the flow control valve 300, the fluid will first be stopped by the body 610 and flow radially outward along the body 610, and then the flow guide 620 can stop the fluid and guide it toward the direction of the flow control valve 300, so that the fluid flowing out from the recovery chamber 112 through the flow control valve 300 can quickly pass through the flow control valve 300 and flow to the compression chamber 111, which is conducive to improving the flow speed of the fluid flowing from the recovery chamber 112 to the compression chamber 111.

[0056] Specifically, when the fluid flows from the first flow channel 314 of the valve body to the pilot valve 600, the fluid will first be stopped by the main body 610 and flow radially outward along the main body 610, and then the guide portion 620 can stop the fluid and guide it toward the direction of the overflow valve body 310, so that the fluid flowing out of the first flow channel 314 of the valve body can quickly flow to the second flow channel 315 of the valve body, so as to flow to the compression chamber 111 through the second flow channel 315 of the valve body, which is beneficial to increase the flow speed of the fluid flowing from the recovery chamber 112 to the compression chamber 111.

[0057] The first flow channel 314 of the valve body in the present invention is the sixth flow channel in the priority application, and the second flow channel 315 of the valve body in the present invention is the seventh flow channel in the priority application.

[0058] In this way, the pilot valve 600 according to the embodiment of the present invention can use the guide part 620 to stop and guide the fluid, which is beneficial to increase the flow speed of the fluid flowing from the recovery chamber 112 to the compression chamber 111, and make the fluid flow more stable, and the damping force of the shock absorber 1 is more stable.

[0059] In some specific embodiments of the present invention, Figure 6 , Figure 8-Figure 10 As shown, the main body 610 is provided with a sealing protrusion 612 , which protrudes from a side of the main body 610 facing the flow regulating valve 300 , and the sealing protrusion 612 cooperates with the flow regulating valve 300 .

[0060] Among them, the flow regulating valve 300 can include a relief valve body 310, which is movably installed in the piston 200, and the relief valve body 310 is constructed with a first valve body flow channel 314 and a second valve body flow channel 315. Part of the sealing protrusion 612 can extend into the first valve body flow channel 314 to control the on-off of the first valve body flow channel 314 and the opening and closing size of the first valve body flow channel 314, thereby controlling the fluid flow of the flow regulating valve 300 through the first valve body flow channel 314.

[0061] In some specific embodiments of the present invention, Figure 6-Figure 10As shown, the main body 610 is further provided with a main body balancing hole 611 , which penetrates the main body 610 along the axial direction of the pilot valve 600 , and is located between the guide portion 620 and the sealing protrusion 612 along the radial direction of the main body 610 .

[0062] The main body balancing hole 611 in the present invention is the first balancing hole in the priority application.

[0063] By setting a body balancing hole 611 on the main body 610, part of the fluid flowing out of the first flow channel 314 of the valve body can flow upward through the body balancing hole 611, thereby reducing the impact force of the fluid flowing out of the first flow channel 314 of the valve body on the pilot valve 600, thereby reducing the impact force of the fluid on the valve core assembly 500, so that the damping force of the shock absorber 1 can be kept stable, which is beneficial to improving the ride comfort of the vehicle.

[0064] In some specific embodiments of the present invention, there are multiple body balancing holes 611, and the multiple body balancing holes 611 are arranged at intervals along the circumference of the body portion 610. In this way, the fluid can be discharged upward through the multiple body balancing holes 611 at the same time, further reducing the impact force of the fluid on the pilot valve 600, and the buffering effect is better.

[0065] In some specific embodiments of the present invention, Fig.10 As shown, along the axial direction of the pilot valve 600 , the sealing protrusion 612 protrudes from the flow guide portion 620 .

[0066] That is to say, along the axial direction of the pilot valve 600, close to the flow regulating valve 300, the sealing protrusion 612 can exceed the guide portion 620, so that the axial extension dimension of the sealing protrusion 612 along the pilot valve 600 can be larger, and when the sealing protrusion 612 cooperates with the flow regulating valve 300, the guide portion 620 will not interfere with the position of the flow regulating valve 300, and the structural setting is more reasonable, so that at least a part of the sealing protrusion 612 can extend into the first flow channel 314 of the valve body to control the fluid flow passing through the first flow channel 314 of the valve body.

[0067] In some specific embodiments of the present invention, Fig.10 As shown, along the axial direction of the pilot valve 600 extending away from the body portion 610 , the sealing protrusion 612 is configured to be a truncated cone with a decreasing cross-sectional area.

[0068] That is, along the axial direction of the pilot valve 600 approaching the flow regulating valve 300, the cross-sectional area of ​​the sealing protrusion 612 can be gradually reduced. With this arrangement, on the one hand, the sealing protrusion 612 itself can be used for assembly guidance so that the sealing protrusion 612 can extend into the first flow channel 314 of the valve body and seal with the first flow channel 314 of the valve body. On the other hand, the sealing protrusion 612 can be used to guide the fluid flowing out of the first flow channel 314 of the valve body to make the fluid flow smoother, which is beneficial to improving the stability of the damping force of the shock absorber 1.

[0069] In addition, such a configuration can also improve the versatility of the pilot valve 600. The sealing protrusion 612 can be adapted to a plurality of valve body first flow channels 314 with different inner diameters, thereby enabling the pilot valve 600 to be adapted to a plurality of different flow control valves 300, thereby achieving higher versatility.

[0070] In some specific embodiments of the present invention, Fig.10 As shown, a body flow guiding surface 613 is formed between the sealing protrusion 612 and the flow guiding portion 620 on one side surface of the body portion 610 facing the flow regulating valve 300 .

[0071] Among them, the main body guide surface 613 can play the role of transition connection, which is beneficial to improving the overall structural strength of the pilot valve 600, and the main body guide surface 613 can also guide the fluid flowing out of the first flow channel 314 of the valve body, further improving the smoothness of the fluid flow, and the damping force of the shock absorber 1 is more stable.

[0072] Furthermore, if Fig.10 As shown, along the axial direction of the pilot valve 600 extending in a direction away from the main body 610 , the main body guide surface 613 is configured as a truncated conical surface with a decreasing cross-sectional area.

[0073] That is, along the axial direction of the pilot valve 600, approaching the flow regulating valve 300, the cross-sectional area of ​​the main body guide surface 613 can also be gradually reduced, so that the main body guide surface 613 can smoothly transition between the main body 610 and the sealing protrusion 612. When the fluid flowing out of the first flow channel 314 of the valve body impacts the pilot valve 600, the sealing protrusion 612 and the main body guide surface 613 can better guide the fluid to make the fluid flow in the shock absorber 1 smoother.

[0074] In some specific embodiments of the present invention, Figure 7-Figure 9 As shown, the guide portion 620 is configured as a circular ring extending circumferentially along the outer periphery of the main body 610. In this way, the annular guide portion 620 can stop and guide the fluid in any radial direction along the main body 610, which is beneficial to improving the stopping and guiding effect of the guide portion 620 on the fluid, so that most of the fluid can quickly flow to the compression chamber 111.

[0075] In some specific embodiments of the present invention, the main body 610 is further provided with a guide rod connecting groove 639 , which is provided on a side of the main body 610 facing the valve core assembly 500 , and the valve core assembly 500 is connected to the guide rod connecting groove 639 .

[0076] Specifically, the guide rod connecting groove 639 can be connected to the guide rod 530 of the valve core assembly 500, and then the pilot valve 600 and the guide rod 530 of the valve core assembly 500 can be connected together to achieve the connection and fixation between the pilot valve 600 and the guide rod 530, and the pilot valve 600 and the guide rod 530 move together.

[0077] The following describes a shock absorber 1 according to an embodiment of the present invention with reference to the accompanying drawings. Figure 1-Figure 6 As shown, the shock absorber 1 includes a cylinder 100 , a piston 200 , a flow regulating valve 300 and a control valve 400 .

[0078] The piston 200 is movably disposed on the cylinder 100, and the piston 200 separates a compression chamber 111 and a recovery chamber 112 in the cylinder 100. The flow regulating valve 300 is disposed in the piston 200 and is respectively connected to the compression chamber 111 and the recovery chamber 112. The control valve 400 includes a valve core assembly 500 and a pilot valve 600 according to the above embodiment of the present invention. The valve core assembly 500 is disposed on the piston 200, the pilot valve 600 is connected to the valve core assembly 500, and the valve core assembly 500 controls the flow regulating valve 300 through the pilot valve 600 to adjust the fluid flow between the compression chamber 111 and the recovery chamber 112.

[0079] According to the shock absorber 1 of the embodiment of the present invention, by utilizing the pilot valve 600 according to the above-mentioned embodiment of the present invention, the guide part 620 can be used to stop and guide the fluid, which is beneficial to increase the flow speed of the fluid flowing from the recovery chamber 112 to the compression chamber 111, and make the fluid flow more stable, and the damping force of the shock absorber 1 is more stable.

[0080] In some specific embodiments of the present invention, Figure 6 As shown, the flow regulating valve 300 includes a relief valve body 310 , which is provided with a first valve body flow channel 314 and a second valve body flow channel 315 . The first valve body flow channel 314 is connected to the recovery chamber 112 , and the second valve body flow channel 315 is connected to the compression chamber 111 .

[0081] The sealing protrusion 612 of the pilot valve 600 is matched with the first flow channel 314 of the valve body to control the opening and closing of the first flow channel 314 and the second flow channel 315 of the valve body.

[0082] Specifically, one end of the first flow channel 314 of the valve body can be connected to one end of the second flow channel 315 of the valve body, the other end of the first flow channel 314 of the valve body is connected to the recovery chamber 112, and the other end of the second flow channel 315 of the valve body is connected to the compression chamber 111. The control valve 400 cooperates with the other end of the first flow channel 314 of the valve body to control the opening and closing of the first flow channel 314 and the second flow channel 315 of the valve body. The second flow channel 315 of the valve body can pass through the opposite sides of the overflow valve body 310 along the axial direction of the overflow valve body 310. The fluid flow of the first flow channel 314 of the valve body and the fluid flow of the second flow channel 315 of the valve body are controlled by the opening and closing of the pilot valve 600.

[0083] In some specific embodiments of the present invention, Fig.10 , Fig.12 and Fig.13 As shown, the inner diameter of the end of the first flow channel 314 of the valve body facing the pilot valve 600 is d1, the inner diameter of the guide portion 620 is d2, and the angle between the radial outer side of the sealing protrusion 612 and the axial direction of the pilot valve 600 is , along the axial direction of the pilot valve 600, the length of the guide portion 620 extending beyond the main body 610 in the direction close to the relief valve body 310 is h. Satisfy: h .

[0084] In this way, when the fluid flows out of the first flow channel 314 of the valve body at a faster flow rate, the pilot valve 600 can also more effectively use the guide part 620 to stop and guide the fluid, that is, the guide part 620 can better alleviate the fluid impact and more effectively improve the flow stability of the fluid.

[0085] Specifically, by limiting h In this way, the length of the guide part 620 exceeding the main body 610 in the direction close to the overflow valve body 310 can be longer, and the fluid flowing out of the first flow channel 314 of the valve body will flow to the guide part 620 after hitting the sealing protrusion 612 and the main body 610 in sequence. At this time, it can be ensured that most of the fluid rebounded by the main body 610 can be stopped by the guide part 620, so that the guide part can guide most of the fluid, and the guide effect of the guide part 620 can be better.

[0086] In some specific embodiments of the present invention, Figure 6 As shown, the projection of the main body 610 on the overflow valve body 310 along the axial direction of the cylinder 100 at least covers part of the second flow channel 315 of the valve body. In other words, at least part of the second flow channel 315 of the valve body is located directly below the main body 610. In this way, the fluid can flow toward the direction close to the overflow valve body 310 under the stopper and guide of the main body 610 and the guide part 620, and the fluid can flow into the second flow channel 315 of the valve body better, so that the fluid flows more smoothly.

[0087] In some specific embodiments of the present invention, Figure 1-Figure 5 As shown, the piston 200 includes a piston rod 210 , a piston valve assembly 220 and a valve body 230 .

[0088] The piston valve assembly 220 separates the compression chamber 111 and the recovery chamber 112 in the cylinder 100 . The piston valve assembly 220 and the piston rod 210 are connected through the valve body 230 . The flow regulating valve 300 is installed in the valve body 230 . The pilot valve 600 extends into the valve body 230 and cooperates with the flow regulating valve 300 .

[0089] For example, the piston valve assembly 220 can be sleeved on the outer circumference of the valve body 230 and threadedly connected to the outer circumference of the valve body 230 , and the piston rod 210 can be sleeved on the outer circumference of the valve body 230 and threadedly connected to the outer circumference of the valve body 230 .

[0090] By dividing the piston 200 into a piston rod 210 and a piston valve assembly 220, the installation of the control valve 400 and the flow regulating valve 300 is more convenient, and the piston valve assembly 220 and the piston rod 210 are connected by the valve body 230, which is convenient for disassembly and assembly.

[0091] Furthermore, if Figure 1 and Figure 6 As shown, the relief valve body 310 is movably disposed in the valve body 230 , and the relief valve body 310 and the valve body 230 define a first chamber 241 and a second chamber 241 .

[0092] Among them, one end of the first flow channel 314 of the valve body is connected to the recovery chamber 112 through the first chamber 241, the other end of the first flow channel 314 of the valve body is connected to the first chamber 241 and the pilot valve 600 is matched with the other end of the first flow channel 314 of the valve body, and one end of the second flow channel 315 of the valve body is connected to the first chamber 241, and the other end of the second flow channel 315 of the valve body is connected to the compression chamber 111, and the fluid flow of the first flow channel 314 of the valve body and the fluid flow of the second flow channel 315 of the valve body are controlled by the opening and closing of the pilot valve 600.

[0093] For example, Figure 6 and Fig.12 As shown, the first flow channel 314 of the valve body may include a radial section 314a and an axial section 314b, the radial section 314a extends radially along the overflow valve body 310, and one end of the radial section 314a passes through the outer circumferential surface of the overflow valve body 310, the axial section 314b extends axially along the overflow valve body 310, one end of the axial section 314b is connected to the other end of the radial section 314a, and the other end of the axial section 314b passes through the side of the overflow valve body 310 facing the pilot valve 600.

[0094] In this way, one end of the radial section 314a can be connected to the first chamber 241, and the other end of the axial section 314b and the end of the second flow channel 315 of the valve body facing the valve core assembly 500 can be connected to the second chamber 242. When the pilot valve 600 is sealed with the other end of the axial section 314b, the first flow channel 314 of the valve body and the second flow channel 315 of the valve body are disconnected. At this time, the recovery chamber 112 cannot be connected to the compression chamber 111 through the first flow channel 314 of the valve body and the second flow channel 315 of the valve body; and when the control valve 400 is separated from the other end of the axial section 314b, the first flow channel 314 of the valve body and the second flow channel 315 of the valve body are connected. At this time, the recovery chamber 112 can be connected to the compression chamber 111 through the first flow channel 314 of the valve body and the second flow channel 315 of the valve body.

[0095] Therefore, when the flow regulating valve 300 is in the closed state at the initial position and the shock absorber 1 is in the recovery condition, when the pressure in the first chamber 241 is relatively high, the fluid in the first chamber 241 will push open the control valve 400 through the first flow channel 314 of the valve body. At this time, the fluid in the first chamber 241 can flow into the second chamber 242 through the first flow channel 314 of the valve body, and then flow to the compression chamber 111 through the second flow channel 315 of the valve body. At this time, the flow rate of the fluid is relatively large, and the shock absorber 1 appears to be "soft".

[0096] A vehicle according to an embodiment of the present invention will be described below with reference to the accompanying drawings. The vehicle includes the shock absorber 1 according to the above-described embodiment of the present invention.

[0097] According to the vehicle of the embodiment of the present invention, by utilizing the shock absorber 1 according to the above-mentioned embodiment of the present invention, the guide part 620 can be used to stop and guide the fluid, which is beneficial to increase the flow speed of the fluid flowing from the recovery chamber 112 to the compression chamber 111, and make the fluid flow more stable, and the damping force of the shock absorber 1 is more stable.

[0098] The pilot valve 600 for the shock absorber according to the embodiment of the present invention, the shock absorber 1 and other components and operations of the vehicle are well known to those skilled in the art and will not be described in detail herein.

[0099] In the description of this specification, the description with reference to the terms "specific embodiment", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0100] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A pilot valve (600) for a shock absorber, characterized in that: include: A body portion (610), the body portion (610) being suitable for being connected to a valve core assembly (500) of the shock absorber (1), and the body portion (610) being suitable for cooperating with a flow regulating valve (300) of the shock absorber (1); A flow guide portion (620), the flow guide portion (620) extending along the circumferential direction of the main body portion (610), and the flow guide portion (620) extending from the outer peripheral edge of the main body portion (610) towards a side close to the flow regulating valve (300).

2. The pilot valve (600) for a shock absorber according to claim 1, characterized in that: The main body (610) is provided with a sealing protrusion (612), the sealing protrusion (612) protruding from a side of the main body (610) facing the flow regulating valve (300), and the sealing protrusion (612) cooperates with the flow regulating valve (300).

3. The pilot valve (600) for a shock absorber according to claim 2, characterized in that: The main body (610) is further provided with a main body balancing hole (611), which penetrates the main body (610) along the axial direction of the pilot valve (600), and is located between the guide portion (620) and the sealing protrusion (612) along the radial direction of the main body (610).

4. The pilot valve (600) for a shock absorber according to claim 3, characterized in that: There are a plurality of the body balancing holes (611), and the plurality of the body balancing holes (611) are arranged at intervals along the circumference of the body portion (610).

5. The pilot valve (600) for a shock absorber according to claim 2, characterized in that: Along the axial direction of the pilot valve (600), the sealing protrusion (612) protrudes from the flow guide portion (620).

6. The pilot valve (600) for a shock absorber according to claim 2, characterized in that: Along the axial direction of the pilot valve (600) extending in a direction away from the main body (610), the sealing protrusion (612) is constructed in a truncated cone shape with a decreasing cross-sectional area.

7. The pilot valve (600) for a shock absorber according to claim 2, characterized in that: A body flow guide surface (613) is formed between the sealing protrusion (612) and the flow guide portion (620) on a side surface of the body portion (610) facing the flow regulating valve (300).

8. The pilot valve (600) for a shock absorber according to claim 7, characterized in that: Along the axial direction of the pilot valve (600) extending in a direction away from the main body (610), the main body guide surface (613) is constructed as a truncated conical surface with a decreasing cross-sectional area.

9. The pilot valve (600) for a shock absorber according to claim 1, characterized in that: The guide portion (620) is constructed in the shape of a circular ring extending circumferentially along the outer periphery of the main body portion (610).

10. The pilot valve (600) for a shock absorber according to claim 1, characterized in that: The main body (610) is further provided with a guide rod connecting groove (639), wherein the guide rod connecting groove (639) is provided on a side of the main body (610) facing the valve core assembly (500), and the valve core assembly (500) is connected to the guide rod connecting groove (639).

11. A shock absorber (1), characterized in that: include: Cylinder (100); A piston (200), the piston (200) being movably disposed on the cylinder (100), and the piston (200) separating a compression chamber (111) and a recovery chamber (112) in the cylinder (100); a flow regulating valve (300), the flow regulating valve (300) being arranged in the piston (200) and being respectively connected to the compression chamber (111) and the recovery chamber (112); A control valve (400), the control valve (400) comprising a valve core assembly (500) and a pilot valve (600) according to any one of claims 1 to 10, the valve core assembly (500) being arranged on the piston (200), the pilot valve (600) being connected to the valve core assembly (500), and the valve core assembly (500) controlling the flow regulating valve (300) through the pilot valve (600) to adjust the fluid flow between the compression chamber (111) and the recovery chamber (112).

12. The vibration absorber (1) according to claim 11, characterized in that The flow regulating valve (300) comprises a relief valve body (310), the relief valve body (310) being provided with a first valve body flow channel (314) and a second valve body flow channel (315), the first valve body flow channel (314) being in communication with the recovery chamber (112), and the second valve body flow channel (315) being in communication with the compression chamber (111); The sealing protrusion (612) of the pilot valve (600) cooperates with the first flow channel (314) of the valve body to control the opening and closing of the first flow channel (314) of the valve body and the second flow channel (315) of the valve body.

13. The shock absorber according to claim 12, characterized in that The inner diameter of the end of the first flow channel (314) of the valve body facing the pilot valve (600) is d1, and the inner diameter of the flow guide portion (620) is d2; The included angle between the radial outer side of the sealing protrusion (612) and the axial direction of the pilot valve (600) is ; Along the axial direction of the pilot valve (600), the length of the flow guide portion (620) extending beyond the main body portion (610) in a direction approaching the overflow valve body (310) is h; Among them, h, d1, d2 and Satisfy: h .

14. The vibration absorber (1) according to claim 12, characterized in that The projection of the main body (610) on the overflow valve body (310) along the axial direction of the cylinder (100) covers at least part of the second flow channel (315) of the valve body.

15. The vibration absorber (1) according to claim 12, characterized in that The piston (200) comprises: Piston rod (210); A piston valve assembly (220), wherein the piston valve assembly (220) separates the compression chamber (111) and the recovery chamber (112) in the cylinder (100); The valve body (230) is connected to the piston valve assembly (220) and the piston rod (210) through the valve body (230), the flow regulating valve (300) is installed in the valve body (230), and the pilot valve (600) extends into the valve body (230) and cooperates with the flow regulating valve (300).

16. The vibration absorber (1) according to claim 15, characterized in that The overflow valve body (310) is movably disposed in the valve body (230), and the overflow valve body (310) and the valve body (230) define a first chamber (241) and a second chamber (242); wherein one end of the first flow channel (314) of the valve body is connected to the recovery chamber (112) via the first chamber (241), the other end of the first flow channel (314) of the valve body is connected to the second chamber (242), and the pilot valve (600) is matched with the other end of the first flow channel (314) of the valve body; and One end of the second flow channel (315) of the valve body is in communication with the second chamber (242), and the other end of the second flow channel (315) of the valve body is in communication with the compression chamber (111), and the fluid flow of the first flow channel (314) of the valve body and the fluid flow of the second flow channel (315) of the valve body are controlled by opening and closing the pilot valve (600).

17. A vehicle, characterized in that: Comprising a vibration absorber (1) according to any one of claims 11-16.

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