Piston rods, shock absorber assemblies, suspension systems, and vehicles

Abstract

This utility model discloses a piston rod, a shock absorber assembly, a suspension device, and a vehicle, relating to the field of vehicle technology, and aims to solve the problem of poor welding quality between the piston rod and the workpiece to be welded. The piston rod includes a first end face and a second end face; the first end face is used for welding with the workpiece to be welded; the piston rod has a positioning hole extending from the first end face toward the second end face; the positioning hole is used to accommodate and position the workpiece to be welded; the piston rod also has an exhaust groove recessed from the inner circumferential surface of the positioning hole toward the outer circumferential surface of the piston rod, and extending through to the first end face.

Description

Technical Field

[0001] This utility model relates to the field of vehicle technology, and in particular to piston rods, shock absorber assemblies, suspension devices, and vehicles. Background Technology

[0002] When connecting a piston rod to a piston, it is usually necessary to weld the piston rod to the workpiece attached to the piston. To ensure the welding quality and efficiency of the piston rod and the workpiece, laser welding is typically used.

[0003] In related technologies, when welding a piston rod to a workpiece using laser welding, the presence of gas in the gap at the welding point and the high temperature at the welding point can affect the welding quality of the piston rod and the workpiece. Utility Model Content

[0004] The purpose of this invention is to provide a piston rod, a shock absorber assembly, a suspension device, and a vehicle, aiming to solve the problem of poor welding quality between the piston rod and the workpiece to be welded.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] According to a first aspect of this application, the present invention provides a piston rod, which includes a first end face and a second end face; the first end face is used for welding with a workpiece to be welded; the piston rod is provided with a positioning hole extending from the first end face toward the second end face; the positioning hole is used for positioning in conjunction with accommodating the workpiece to be welded; the piston rod is also provided with an exhaust groove recessed from the inner circumferential surface of the positioning hole toward the outer circumferential surface of the piston rod and extending through to the first end face.

[0007] The piston rod provided in this embodiment is positioned by engaging with the workpiece through a positioning hole, facilitating the alignment of the first end face of the piston rod with the welding position of the workpiece, thus simplifying the welding process. Furthermore, by providing an venting groove, which is recessed from the inner circumferential surface of the positioning hole towards the outer circumferential surface of the piston rod and extends to the first end face, the high temperature generated during welding causes the gas in the gap between the piston rod and the workpiece to expand and then be vented into the positioning hole through the venting groove. This reduces the impact of the gas on the molten pool at the welding position, preventing pits and porosity and ensuring the welding quality of the piston rod and the workpiece.

[0008] In some embodiments, there are multiple exhaust channels, which are spaced apart circumferentially along the positioning holes.

[0009] In some embodiments, the cross-section of the exhaust groove is one of a triangle, a square, or a semicircle, and the cross-section is parallel to the first end face.

[0010] In some embodiments, the length of the exhaust groove is less than the length of the positioning hole along the extending direction of the piston rod.

[0011] In some embodiments, the piston rod is further provided with an exhaust port, which extends from the bottom surface of the positioning hole toward the second end face, and the bottom surface of the positioning hole is the inner wall surface of the positioning hole facing away from the first end face.

[0012] In some embodiments, the diameter of the vent hole is smaller than the diameter of the positioning hole.

[0013] In some embodiments, the inner peripheral surface of the positioning hole includes a first inclined surface. Along the extending direction of the positioning hole, the first inclined surface includes a first edge and a second edge. The first edge is located on the first end face, and the second edge is located on the side of the first edge opposite to the first end face and on the side of the first edge opposite to the outer peripheral surface of the piston rod.

[0014] According to a second aspect of this application, a shock absorber assembly is provided, including a piston rod and a component to be welded. The component to be welded includes a body portion, a welding portion, and a positioning portion. The welding portion is disposed on the body portion and welded to a first end face. The positioning portion is connected to the side of the welding portion opposite to the body portion and is accommodated in a positioning hole.

[0015] In some embodiments, the piston rod assembly further includes a hydraulic cylinder, a piston, and a solenoid valve. The hydraulic cylinder has a hydraulic chamber containing hydraulic oil. The piston is located within the hydraulic chamber and is capable of reciprocating within the cylinder. The piston has a throttling orifice that extends through the piston along its direction of motion. The solenoid valve is located at the throttling orifice and is used to open or close the orifice. The solenoid valve is connected between the piston and the piston rod. The part to be welded is the valve seat of the solenoid valve.

[0016] In some embodiments, the positioning portion is formed with a second inclined surface that extends circumferentially along the positioning hole and along the extension direction of the positioning hole. The second inclined surface includes a third edge and a fourth edge, the fourth edge being located on the side of the third edge facing the valve seat and on the side of the third edge facing the inner circumferential surface of the positioning hole.

[0017] In some embodiments, a gas guide gap is provided between the second inclined surface and the inner peripheral surface of the positioning hole, and the gas guide gap connects the exhaust groove and the exhaust hole.

[0018] In some embodiments, along the radial direction of the piston rod, the projection of the third edge is located outside the projection of the exhaust groove, and the projection of the fourth edge is located inside the projection of the exhaust groove.

[0019] In some embodiments, the inner peripheral surface of the positioning hole includes a first inclined surface. Along the extending direction of the positioning hole, the first inclined surface includes a first edge and a second edge. The first edge is located on the first end face, and the second edge is located on the side of the first edge opposite to the first end face and on the side of the first edge opposite to the outer peripheral surface of the piston rod. The valve seat is provided with a transition arc surface that extends circumferentially along the positioning hole. One end of the transition arc surface is connected to the surface of the positioning part facing the inner peripheral surface of the positioning hole, and the other end of the transition arc surface is connected to the surface of the positioning part opposite to the valve seat. An air chamber is formed between the transition arc surface and the first inclined surface.

[0020] According to a third aspect of this application, a suspension device is provided, which includes a shock absorber assembly.

[0021] According to a fourth aspect of this application, a vehicle is provided, the vehicle including a suspension system, a body, and wheels, the suspension system being connected to the body and the wheels. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the vehicle structure provided in an embodiment of this application;

[0024] Figure 2 A cross-sectional schematic diagram of the workpiece to be welded provided in an embodiment of this application;

[0025] Figure 3 This is a cross-sectional schematic diagram showing the connection between the workpiece to be welded and the piston rod, provided in an embodiment of this application.

[0026] Figure 4 for Figure 3 A magnified structural diagram of A in the middle;

[0027] Figure 5 A cross-sectional view of the piston rod after the exhaust groove is machined and connected to the workpiece to be welded, according to an embodiment of this application.

[0028] Figure 6 for Figure 5 Enlarged diagram of B in the diagram.

[0029] Figure label:

[0030] 1000, vehicles;

[0031] 100. Body; 200. Wheels; 300. Suspension system;

[0032] 1. Piston rod; 11. Positioning hole; 111. First inclined surface; 111a. First edge; 111b. Second edge; 12. First end face; 13. Second end face; 14. Exhaust groove; 15. Exhaust hole;

[0033] 2. Part to be welded; 21. Body part; 22. Welding part; 23. Positioning part; 231. Second inclined surface; 231a. Third edge; 231b. Fourth edge;

[0034] 3. Valve seat; 31. Transition arc surface;

[0035] 4. Air chamber;

[0036] 5. Air guide gap. Detailed Implementation

[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0038] In the description of this utility model, it should be understood that the terms "upper," "lower," "left," "right," "front," "rear," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or relative positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Unless otherwise specified, the above-mentioned orientational descriptions can be flexibly set in actual application, provided that the relative positional relationship shown in the accompanying drawings is satisfied.

[0039] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0040] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "communication" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. They can refer to a direct connection or an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0041] In embodiments of this invention, the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, article, or apparatus that includes that element.

[0042] In this embodiment of the invention, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design described as "exemplary" or "for example" in this embodiment of the invention should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0043] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0044] This application provides a vehicle 1000. The vehicle 1000 can be a pure electric vehicle, a hybrid electric vehicle, a methanol vehicle, a gasoline vehicle, etc.

[0045] Please see Figures 1-3 As shown, Figure 1 This is a schematic diagram of the vehicle 1000 provided in an embodiment of this application. Figure 2 This is a cross-sectional view of the workpiece 2 to be welded provided in an embodiment of this application. Figure 3 This is a cross-sectional view showing the connection between the weldable part 2 and the piston rod 1, as provided in an embodiment of this application. The vehicle 1000 includes a body 100 and wheels 200. The body 100 is used for passenger seating and carrying goods, and the wheels 200 are mounted under the body 100 to support the body 100 and are able to roll relative to the road surface so that the vehicle 1000 can move.

[0046] The vehicle 1000 also includes a suspension system 300. The suspension system 300 is located between the body 100 and the wheels 200 and is used to absorb the impact and vibration of the body 100 during the driving process to ensure the stability and comfort of the vehicle 1000.

[0047] The suspension system 300 includes a shock absorber assembly connected between the vehicle body 100 and the wheel 200.

[0048] The shock absorber assembly includes a hydraulic cylinder, a piston, a piston rod 1, and a spring. The hydraulic cylinder is connected to the wheel 200 and has a hydraulic chamber containing hydraulic oil. The piston is located within the hydraulic chamber, is sealed to the inner wall of the hydraulic chamber, and is capable of reciprocating within the hydraulic chamber.

[0049] The hydraulic cylinder also has an installation hole for communicating with the hydraulic chamber. The piston rod 1 passes through the installation hole and is sealed to the inner wall of the installation hole. One end of the piston rod 1 is connected to the piston, and the other end of the piston rod 1 is connected to the vehicle body 100.

[0050] The spring connects the hydraulic cylinder and the piston rod 1.

[0051] When the vehicle travels on a bumpy road, the wheel 200 vibrates, causing the piston rod to push the piston to slide within the hydraulic chamber, compressing the hydraulic fluid and thus cushioning the vehicle body 100. As the piston slides within the hydraulic cylinder, it causes the spring to stretch or compress, facilitating piston reset and ensuring the proper distance between the vehicle body 100 and the wheel 200.

[0052] The shock absorber assembly also includes a solenoid valve. A throttling orifice is provided on the piston, extending through the piston along its direction of movement. The solenoid valve is connected between the piston rod 1 and the piston, and is located at the throttling orifice, used to open or close the orifice.

[0053] During the process of the piston sliding in the hydraulic chamber, the throttle orifice can be opened by the solenoid valve to allow hydraulic oil to flow on both sides of the piston, thereby adjusting the damping force of the shock absorber assembly.

[0054] The solenoid valve includes a weldable component 2, which is welded to a piston rod 1 to connect the piston rod 1 to the solenoid valve. For example, the solenoid valve includes a valve seat 3 and a valve body, with the valve body connected to the valve seat 3 for opening or closing a throttling orifice on the piston. The weldable component 2 can be the valve seat 3 of the solenoid valve.

[0055] In other examples, the component 2 to be welded can also be other parts connected to the piston rod 1, such as a piston, a connecting rod connecting the piston rod 1 and the piston, etc. This application does not specifically limit this.

[0056] Here, this application uses the component to be welded 2 as the valve seat 3 of a solenoid valve as an example for illustration.

[0057] For easier welding of the workpiece 2 to the piston rod 1, please refer to [link / reference]. Figure 2 and combined Figure 3 The component to be welded 2 includes a body portion 21, a welding portion 22, and a positioning portion 23. The welding portion 22 is disposed on the body portion 21 and is welded to the first end face 12. Specifically, the first end face 12 is the welding surface of the piston rod 1, and the end face of the welding portion 22 facing the piston rod 1 is the welding surface of the welding portion 22. During welding, the welding surface of the piston rod 1 is welded to the welding surface of the welding portion 22.

[0058] When the part to be welded is the valve seat of a solenoid valve, the valve body of the solenoid valve is connected to the main body 21.

[0059] The positioning part 23 is connected to the side of the welding part 22 opposite to the main body part 21 and is housed in the positioning hole 11.

[0060] The positioning part 23, which engages with the positioning hole 11 of the piston rod 1, facilitates the positioning of the welding surface of the piston rod 1 and the welding surface of the welding part 22, thereby facilitating the welding of the piston rod 1 and the workpiece 2 to be welded. Furthermore, it prevents welding defects caused by misalignment of the workpiece 2 or the piston rod 1.

[0061] The welding part 22 and the body part 21 are integrally formed. For example, the welding part 22 can be an annular cylindrical structure, a columnar structure, etc.

[0062] The positioning part 23 and the welding part 22 are integrally formed. For example, the positioning part 23 can be an annular cylindrical structure, a columnar structure, etc.

[0063] The diameter of the positioning hole 11 is 11mm, and the diameter of the positioning part 23 is also 11mm.

[0064] In some embodiments, please continue reading Figure 3 When the positioning part 23 is housed in the positioning hole 11, the welding part 22 abuts against the first end face 12 of the piston rod 1.

[0065] When the positioning part 23 is positioned in conjunction with the positioning hole 11, the side of the welding part 22 facing the positioning part 23 abuts against the first side of the piston rod 1. That is, the welding surface of the piston rod 1 abuts against the welding surface of the welding part 22.

[0066] In this way, the gap between the welding surface of the piston rod 1 and the welding surface of the welding part 22 can be reduced, so as to avoid poor welding quality due to the distance between the welding part 22 of the workpiece to be welded and the first end face 12 of the piston rod 1, thereby improving the welding quality.

[0067] In this configuration, the length of the positioning hole 11 is greater than the length of the positioning part 23 along the axial direction. For example, the length of the positioning hole 11 is 6 mm, and the length of the positioning part 23 is 5 mm. This prevents the positioning part 23 from contacting the inner wall surface of the body part 21 of the workpiece 2 opposite to the positioning hole 11, which would result in an excessively large gap between the welding surface of the piston rod 1 and the welding surface of the welding part 22, thus avoiding affecting the welding quality.

[0068] In some embodiments, please refer to Figure 4 and combined Figure 3 , Figure 4 for Figure 3 An enlarged structural diagram of A is shown. The inner circumferential surface of the positioning hole 11 includes a first inclined surface 111. Along the extending direction of the positioning hole 11, the first inclined surface 111 includes a first edge 111a and a second edge 111b. The first edge 111a is located on the first end face 12, and the second edge 111b is located on the side of the first edge 111a opposite to the first end face 12 and on the side of the first edge 111a opposite to the outer circumferential surface of the piston rod 1. The valve seat 3 is provided with a transition arc surface 31, which extends circumferentially along the positioning hole 11. One end of the transition arc surface 31 is connected to the surface of the positioning part 23 facing the inner circumferential surface of the positioning hole 11, and the other end of the transition arc surface 31 is connected to the surface of the positioning part 23 opposite to the valve seat 3. An air chamber 4 is formed between the transition arc surface 31 and the first inclined surface 111.

[0069] By setting the first inclined surface 111, when the positioning part 23 of the valve seat 3 is positioned in conjunction with the positioning hole 11, the first inclined surface 111 can guide the positioning part 23, so that the positioning part 23 of the valve seat 3 can be positioned in conjunction with the positioning hole 11 of the piston rod 1.

[0070] A transition arc surface 31 is provided at the connection between the positioning part 23 and the welding part 22 of the valve seat 3 to avoid the stress concentration caused by setting the connection between the positioning part 23 and the welding part 22 as a right angle, which would make the connection between the positioning part 23 and the welding part 22 unstable, thereby affecting the positioning effect between the positioning part 23 and the positioning hole 11, and thus affecting the welding quality of the piston rod 1 and the valve seat 3.

[0071] However, when the positioning hole 11 and the positioning part 23 are positioned together, the welding surface of the welding part 22 contacts the welding surface of the piston rod 1, which will result in a certain gap between the first inclined surface 111 and the transition arc surface 31, and this gap forms the air chamber 4.

[0072] When welding piston rod 1 and valve seat 3, the gas in gas chamber 4 becomes high-temperature and high-pressure gas due to the high temperature at the welding position, and enters the molten pool at the welding position, causing pits and bubbles to form at the welding position, thereby reducing the welding quality.

[0073] To improve welding quality, please refer to Figure 5 and Figure 6 , Figure 5 This is a cross-sectional view of the piston rod 1 after the exhaust groove is machined and connected to the workpiece 2 to be welded, according to an embodiment of this application. Figure 6 for Figure 5 Enlarged schematic diagram of B. Piston rod 1 includes a first end face 12 and a second end face 13; the first end face 12 is used for welding with the workpiece 2 to be welded; piston rod 1 is provided with a positioning hole 11, which extends from the first end face 12 toward the second end face 13; the positioning hole 11 is used to cooperate with and position the workpiece 2 to be welded; piston rod 1 is also provided with an exhaust groove 14, which is recessed from the inner circumferential surface of the positioning hole 11 toward the outer circumferential surface of the piston rod 1 and extends through to the first end face 12.

[0074] Positioning the piston rod 1 with the workpiece 2 via the positioning hole 11 facilitates alignment of the first end face 12 of the piston rod 1 with the welding position of the workpiece 2, thus enabling convenient welding of the piston rod 1 and the workpiece 2. Furthermore, by providing an exhaust groove 14, which is recessed from the inner circumferential surface of the positioning hole 11 towards the outer circumferential surface of the piston rod 1 and extends to the first end face 12, the high temperature generated during welding causes the gas in the gap between the piston rod 1 and the workpiece 2 to expand and then be discharged through the exhaust groove 14 into the positioning hole 11. This reduces the impact of the gas on the molten pool at the welding position of the piston rod 1 and the workpiece 2, preventing pits and porosity at the welding position and ensuring the welding quality of the piston rod 1 and the workpiece 2.

[0075] The exhaust groove 14 is recessed to a depth of 0-0.5mm from the inner circumference of the positioning hole 11 to the outer circumference of the piston rod 1.

[0076] In some embodiments, the cross-section of the exhaust groove 14 is one of a triangle, a square, or a semicircle, and the cross-section is parallel to the first end face 12.

[0077] The cross-section of the exhaust groove 14 is set to be parallel to the first end face 12. When the first end face 12 is welded to the valve seat 3, the gas in the gas chamber 4 can be discharged outward along the smoothest path, thereby improving the efficiency of gas discharge.

[0078] For example, the exhaust groove 14 has a triangular cross-section. The inner circumferential surface of the positioning hole 11 is circular, and the triangular cross-section of the exhaust groove 14 makes it easier to machine on the inner circumferential surface of the positioning hole 11. Furthermore, the triangular cross-section of the exhaust groove 14 does not reduce the structural stability of the piston rod 1, making it less prone to loosening when the valve seat 3 is engaged with the positioning hole 11.

[0079] In some embodiments, please continue reading Figure 2The positioning part 23 has a second inclined surface 231. The second inclined surface 231 extends circumferentially along the positioning hole 11 and along the extension direction of the positioning hole 11. The second inclined surface 231 includes a third edge 231a and a fourth edge 231b. The fourth edge 231b is located on the side of the third edge 231a facing the valve seat 3 and on the side of the third edge 231a facing the inner circumferential surface of the positioning hole 11.

[0080] A second inclined surface 231 is provided in the positioning part 23. During the positioning process of the positioning part 23 of the valve seat 3 and the positioning hole 11 of the piston rod 1, the second inclined surface 231 can cooperate with the first inclined surface 111 on the positioning hole 11 to guide the valve seat 3 together, making it easier for the positioning part 23 and the positioning hole 11 to cooperate and be positioned.

[0081] The length of the second inclined plane 231 is greater than the length of the first inclined plane 111.

[0082] In some embodiments, please refer to Figure 6 There is an air guide gap 5 between the second inclined surface 231 and the inner circumferential surface of the positioning hole 11, and the air guide gap 5 connects the exhaust groove 14 and the exhaust hole 15.

[0083] By setting the gas guide gap 5, the gas in the gas chamber 4 is discharged from the exhaust groove 14, discharged along the guide gap to the exhaust port 15, and then discharged from the exhaust port 15 to the outside of the piston rod 1.

[0084] In some embodiments, along the radial direction of the piston rod 1, the projection of the third edge 231a is located outside the projection of the exhaust groove 14, and the projection of the fourth edge 231b is located inside the projection of the exhaust groove 14.

[0085] In this way, the projection of the air guide gap 5 formed between the second inclined surface 231 and the inner circumferential surface of the positioning hole 11 on the radial direction of the piston rod 1 partially coincides with the exhaust groove, so that the air guide gap can be directly connected to the exhaust groove without the need to open a separate channel connecting the air guide gap and the exhaust groove in the piston rod or positioning part, which facilitates the processing of the piston rod and the workpiece to be welded.

[0086] In some other embodiments, along the axial direction of the positioning hole, the exhaust groove 14 may also be located on the side of the air guide gap 5 facing the body portion 21 of the workpiece 2 to be welded, and then a channel connecting the air guide gap 5 and the exhaust groove 14 is opened in the piston rod 1 or the positioning portion 23 so that the exhaust groove 14 and the air guide gap 5 are connected.

[0087] In some embodiments, please continue reading Figure 5 and Figure 6 There are multiple exhaust grooves 14, which are spaced apart circumferentially along the positioning hole 11.

[0088] Multiple venting grooves 14 are arranged circumferentially around the positioning hole 11 to accelerate the outward discharge of gas from the gas chamber 4. This prevents gas from remaining in the weld and forming bulges at the weld, thus affecting the weld quality. The multiple venting grooves 14 improve the efficiency of gas discharge and reduce the occurrence of welding defects.

[0089] For example, the number of exhaust slots 14 can be one. The number of exhaust slots 14 can also be multiple, such as 2, 3, 4, 5, 6, 7, 8, 9, etc.

[0090] In some embodiments, the length of the vent groove 14 is less than the length of the positioning hole 11 along the extending direction of the positioning hole 11.

[0091] Setting the length of the exhaust groove 14 to be less than the length of the positioning hole 11 ensures that the exhaust groove 14 can discharge gas outwards, while preventing the machining of a longer exhaust groove 14 along the extension direction of the positioning hole 11, thus reducing the machining difficulty of the exhaust groove 14. Furthermore, it does not reduce the structural strength of the piston rod 1 between the inner circumferential surface of the positioning hole 11 and the outer circumferential surface of the piston rod 1.

[0092] Based on this, after the positioning hole 11 and the positioning part 23 are positioned together, the air guide gap 5 between the second inclined surface 231 of the positioning part 23 and the inner circumferential surface of the positioning hole 11 can also connect the exhaust groove 14 and the exhaust hole 15, so that the gas in the air chamber 4 is discharged into the exhaust hole 15 through the air guide gap 5 in the exhaust groove 14.

[0093] In some other examples, the length of the vent groove 14 may be less than the length of the positioning hole 11. The length of the vent groove 14 may also be equal to the length of the positioning hole 11.

[0094] The positioning hole 11 has a length of 6 mm. The exhaust groove 14 has a length of 3.5 mm to 6 mm. The positioning part 23 is provided with a second inclined surface 231, so that when the length of the exhaust groove 14 is 3.5 mm, the exhaust groove 14 can connect with the exhaust hole 15.

[0095] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A piston rod, characterized in that The piston rod (1) includes a first end face (12) and a second end face (13); the first end face (12) is used for welding with the workpiece (2) to be welded. The piston rod (1) is provided with a positioning hole (11), which extends from the first end face toward the second end face (13); the positioning hole (11) is used to cooperate with and position the workpiece (2) to be welded. The piston rod (1) is also provided with an exhaust groove (14), which is recessed from the inner circumferential surface of the positioning hole (11) toward the outer circumferential surface of the piston rod (1) and extends through to the first end face.

2. The piston rod according to claim 1, characterized in that, The number of exhaust grooves (14) is multiple, and the multiple exhaust grooves (14) are arranged at circumferential intervals along the positioning hole (11).

3. The piston rod according to claim 1, characterized in that, The cross-section of the exhaust groove (14) is one of triangle, square, or semicircle, and the cross-section is parallel to the first end face (12).

4. The piston rod according to any one of claims 1-3, characterized in that, Along the extending direction of the positioning hole (11), the length of the exhaust groove (14) is less than the length of the positioning hole (11).

5. The piston rod according to any one of claims 1-3, characterized in that, The piston rod (1) is also provided with an exhaust hole (15), which extends from the bottom surface of the positioning hole (11) toward the second end face (13). The bottom surface of the positioning hole (11) is the inner wall surface of the positioning hole (11) facing away from the first end face (12).

6. The piston rod according to claim 5, characterized in that, The diameter of the vent hole (15) is smaller than the diameter of the positioning hole (11).

7. The piston rod according to any one of claims 1-3, characterized in that, The inner peripheral surface of the positioning hole (11) includes a first inclined surface (111). Along the extending direction of the positioning hole (11), the first inclined surface (111) includes a first edge (111a) and a second edge (111b). The first edge (111a) is located on the first end face (12), and the second edge (111b) is located on the side of the first edge (111a) opposite to the first end face (12) and on the side of the first edge (111a) opposite to the outer peripheral surface of the piston rod (1).

8. A shock absorber assembly, characterized in that, include: Piston rod (1) according to any one of claims 1-7; The part to be welded (2) includes a body part (21), a welding part (22) and a positioning part (23). The welding part (22) is disposed on the body part (21) and welded to the first end face (12). The positioning part (23) is connected to the side of the welding part (22) facing away from the body part (21) and is accommodated in the positioning hole (11).

9. The shock absorber assembly according to claim 8, characterized in that, Also includes: A hydraulic cylinder, wherein the hydraulic cylinder is provided with a hydraulic chamber and the hydraulic chamber is provided with hydraulic oil; A piston is disposed within the hydraulic chamber and is capable of reciprocating within the hydraulic cylinder; the piston is provided with a throttling orifice that penetrates the piston along the direction of its movement. A solenoid valve is provided at the throttling orifice for opening or closing the throttling orifice, and the solenoid valve is connected between the piston and the piston rod (1); The component to be welded is the valve seat of the solenoid valve.

10. The shock absorber assembly according to claim 9, characterized in that, The positioning part (23) has a second inclined surface (231) that extends circumferentially along the positioning hole (11) and along the extension direction of the positioning hole (11). The second inclined surface (231) includes a third edge (231a) and a fourth edge (231b). The fourth edge (231b) is located on the side of the third edge (231a) facing the valve seat and on the side of the third edge (231a) facing the inner circumferential surface of the positioning hole (11).

11. The shock absorber assembly according to claim 10, characterized in that, There is an air guide gap (5) between the second inclined surface (231) and the inner circumferential surface of the positioning hole (11), and the air guide gap (5) connects the exhaust groove (14) and the exhaust hole (15).

12. The shock absorber assembly according to claim 11, characterized in that, Along the radial direction of the piston rod (1), the projection of the third edge (231a) is located outside the projection of the exhaust groove (14), and the projection of the fourth edge (231b) is located inside the projection of the exhaust groove (14).

13. The shock absorber assembly according to claim 12, characterized in that, The inner peripheral surface of the positioning hole (11) includes a first inclined surface (111). Along the extending direction of the positioning hole (11), the first inclined surface (111) includes a first edge (111a) and a second edge (111b). The first edge (111a) is located on the first end face (12), and the second edge (111b) is located on the side of the first edge (111a) opposite to the first end face (12) and on the side of the first edge (111a) opposite to the outer peripheral surface of the piston rod (1). The valve seat (3) is provided with a transition arc surface (31), which extends circumferentially along the positioning hole (11). One end of the transition arc surface (31) is connected to the inner circumferential surface of the positioning part (23) facing the positioning hole (11), and the other end of the transition arc surface (31) is connected to the side surface of the positioning part (23) facing away from the valve seat (3). An air chamber (4) is formed between the transition arc surface (31) and the first inclined surface (111).

14. A suspension device, characterized in that, Includes the shock absorber assembly according to any one of claims 8-13.

15. A vehicle, characterized in that, include The suspension device (300) as claimed in claim 14; Wheel (200); the suspension device (300) is connected to the wheel (200); The vehicle body (100) is connected to the suspension device (300).

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