Clearance compensation device, steering system and vehicle

Abstract

The utility model discloses a clearance compensation device, a steering system and a vehicle. A clearance compensation device belongs to the technical field of vehicles and comprises a plug body, an ejector rod, a plug and an elastic part, the plug body is provided with a mounting through hole, the mounting through hole comprises a first hole section and a second hole section which are connected, the ejector rod comprises a rod head and a rod body, the rod head is arranged in the first hole section, the rod body penetrates through the second hole section, and the elastic part is arranged on the plug body in the axial direction of the mounting through hole. One end of the rod body is connected with the rod head, the other end of the rod body is located outside the installation through hole, the plug is installed in the first hole section, in the axial direction of the installation through hole, one end of the elastic piece abuts against the plug, the other end of the elastic piece abuts against the rod head, and the clearance compensation device can be used for compensating a clearance between a worm gear and a worm shaft in a steering transmission mechanism of a vehicle. When the backlash compensation device is installed on the steering transmission mechanism, the backlash compensation device can be installed as an integrated structure, and the installation difficulty of the backlash compensation device can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, and more specifically, to a clearance compensation device, a steering system and a vehicle. Background Art

[0002] At present, vehicles usually have an electric power steering system. The electric power steering system can generate an auxiliary torque when the vehicle steers, so as to reduce the steering torque applied by the driver to the steering wheel. The electric power steering system usually adopts a worm and worm gear transmission mechanism to achieve speed change. For the worm and worm gear transmission mechanism, the meshing clearance between the worm gear and the worm has always been an issue that cannot be ignored.

[0003] In the related art, a clearance adjustment mechanism is usually used to adjust the meshing clearance between the worm gear and the worm. When the clearance adjustment mechanism is installed on the electric power steering system, it is necessary to install each component of the clearance adjustment mechanism in sequence, and the installation difficulty is relatively large. Summary of the Utility Model

[0004] The utility model aims to at least solve one of the above technical problems in the prior art to a certain extent. For this purpose, the utility model provides a clearance compensation device, which is beneficial to reducing the installation difficulty of the clearance compensation device.

[0005] The utility model also provides a steering system with the above clearance compensation device.

[0006] The utility model also provides a vehicle with the above steering system.

[0007] The clearance compensation device according to an embodiment of the utility model includes: a plug body, a push rod, a plug and an elastic member. The plug body has an installation through hole, and the installation through hole includes: a first hole section and a second hole section connected to each other. The push rod includes: a rod head and a rod body. The rod head is movably disposed in the first hole section, and the rod body is movably inserted through the second hole section. In the axial direction of the installation through hole, one end of the rod body is connected to the rod head, and the other end of the rod body is located outside the installation through hole. The plug is installed in the first hole section. In the axial direction of the installation through hole, one end of the elastic member abuts against the plug, and the other end of the elastic member abuts against the rod head. Wherein, in the axial direction of the installation through hole, the connecting end surface of the first hole section and the second hole section stops the rod head on the side where the rod head faces away from the plug.

[0008] The clearance compensation device according to the embodiment of the present utility model can be used to compensate the clearance between the worm wheel and the worm shaft in the steering transmission mechanism of a vehicle, which is beneficial to reducing the wear between the worm wheel and the worm shaft and improving the service life of the steering transmission mechanism. When the clearance compensation device is installed on the steering transmission mechanism, the clearance compensation device can be installed as an integral structure, which is beneficial to reducing the installation difficulty of the clearance compensation device.

[0009] According to some embodiments of the present utility model, the aperture of the first hole section is D1, the aperture of the second hole section is D2, the outer diameter of the rod head is D3, and the outer diameter of the rod body is D4, satisfying the relationship: D1≥D3>D2≥D4.

[0010] According to some embodiments of the present utility model, the plug body includes: a screw rod portion and a plug head portion. The screw rod portion has an external thread; the plug head portion is connected to the screw rod portion, and the plug head portion and the screw rod portion jointly define the installation through hole. The second hole section is located on the side of the screw rod portion away from the plug head portion. In a plane perpendicular to the axis of the installation through hole, the projected area of the plug head portion is larger than the projected area of the screw rod portion.

[0011] According to some embodiments of the present utility model, the axis of the installation through hole, the axis of the screw rod portion, and the axis of the plug head portion coincide.

[0012] According to some embodiments of the present utility model, the plug head portion has a riveting limit strip, and in the axial direction of the installation through hole, the riveting limit strip is adapted to abut against one end of the plug that is away from the elastic member.

[0013] According to some embodiments of the present utility model, one end of the plug head portion away from the screw rod portion has an assembly groove, and the assembly groove communicates with the first hole section. In the radial direction of the installation through hole, the assembly groove at least partially corresponds to the plug.

[0014] According to some embodiments of the present utility model, the plug is in interference fit with the inner wall of the first hole section.

[0015] According to another embodiment of the present utility model, a steering system includes: a steering transmission mechanism and a clearance compensation device. The steering transmission mechanism includes: a housing, a worm shaft, a worm wheel, and a first bearing. The worm shaft is rotatably connected to the housing through the first bearing, and the worm wheel meshes with the worm shaft; the clearance compensation device is the above-mentioned clearance compensation device, and the plug body is fixedly inserted through the housing. In the radial direction of the first bearing, the rod body abuts against one side of the first bearing away from the worm wheel.

[0016] According to the steering system of the embodiment of the utility model, the clearance compensation device thereof can be used to compensate for the clearance between the worm wheel and the worm shaft in the steering transmission mechanism, which is beneficial to reduce the wear between the worm wheel and the worm shaft and improve the service life of the steering transmission mechanism. When the clearance compensation device is installed to the steering transmission mechanism, the clearance compensation device can be installed as an integrated structure, which is beneficial to reduce the difficulty of installing the clearance compensation device.

[0017] According to some embodiments of the present utility model, the steering transmission mechanism further includes: a second bearing, and an end of the worm shaft away from the first bearing is rotatably and swingably connected to the housing through the second bearing.

[0018] A vehicle according to another aspect of the present invention includes the above-mentioned steering system.

[0019] According to the vehicle of the embodiment of the utility model, the clearance compensation device can be used to compensate for the clearance between the worm wheel and the worm shaft in the steering transmission mechanism, which is beneficial to reduce the wear between the worm wheel and the worm shaft and improve the service life of the steering transmission mechanism. When the clearance compensation device is installed to the steering transmission mechanism, the clearance compensation device can be installed as an integrated structure, which is beneficial to reduce the difficulty of installing the clearance compensation device.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is an exploded view of a gap compensation device according to an embodiment of the utility model;

[0022] Figure 2 is a cross-sectional view of a gap compensation device according to an embodiment of the utility model;

[0023] Figure 3 is a cross-sectional view of a steering system according to an embodiment of the utility model;

[0024] Figure 4 It is a stereoscopic diagram of a worm shaft, a first bearing, a sealing cover and an adjusting bushing according to an embodiment of the utility model.

[0025] Reference numerals:

[0026] Plug body 1; mounting through hole 11; first hole section 111; second hole section 112; connecting end surface 113; screw rod portion 12; plug head portion 13; riveting limit strip 131; assembly groove 132; mounting end surface 133;

[0027] Top rod 2; rod head 21; rod shaft 22;

[0028] Plug 3; elastic member 4;

[0029] Clearance compensation device 10;

[0030] Steering transmission mechanism 20; housing 201; worm shaft 202; worm gear 203; first bearing 204; second bearing 205; sealing cover 206; adjusting bushing 207; communication hole 2071;

[0031] Steering system 100. Specific embodiments

[0032] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0033] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "length", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

[0034] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0035] In the present invention, unless otherwise clearly defined and limited, the terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or can communicate with each other; it may be directly connected, or indirectly connected through an intermediate medium, and may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] The following will be combined with Figures 1 - 4 Describe in detail the clearance compensation device 10, the steering system 100 and the vehicle according to the embodiments of the present invention.

[0037] Refer to Figure 1 And Figure 2As shown, the gap compensation device 10 according to the embodiment of the utility model includes: a plug body 1, a push rod 2, a plug 3 and an elastic member 4, the plug body 1 has a mounting through hole 11, the mounting through hole 11 includes: a first hole section 111 and a second hole section 112 connected, the push rod 2 includes: a rod head 21 and a rod body 22, the rod head 21 is movably arranged in the first hole section 111, and the rod body 22 is movably penetrated into the second hole section 112, in the axial direction of the mounting through hole 11, one end of the rod body 22 is connected to the rod head 21, and the other end of the rod body 22 is located outside the mounting through hole 11, the plug 3 is installed in the first hole section 111, in the axial direction of the mounting through hole 11, one end of the elastic member 4 abuts against the plug 3, and the other end of the elastic member 4 abuts against the rod head 21.

[0038] Among them, in the axial direction of the mounting through hole 11, the connecting end surface 113 of the first hole segment 111 and the second hole segment 112 stops the rod head 21 on the side of the rod head 21 away from the plug 3 to achieve axial limitation of the rod head 21 and prevent the rod head 21 from slipping out through the second hole segment 112.

[0039] It should be noted that, refer to Figure 3 As shown, the clearance compensation device 10 can be used to compensate for the clearance between the worm wheel 203 and the worm shaft 202 in the steering transmission mechanism 20 of the vehicle, so as to reduce the wear between the worm wheel 203 and the worm shaft 202 and improve the service life of the steering transmission mechanism 20, wherein the worm wheel 203 can be connected to the drive motor, and the worm shaft 202 can be indirectly connected to the wheel through the steering knuckle of the vehicle. When the driver steers by means of the steering wheel, the drive motor can drive the worm wheel 203 to rotate, and the worm wheel 203 can drive the worm shaft 202 to rotate, and the worm shaft 202 can drive the steering knuckle to rotate, thereby realizing the electronic power steering of the vehicle and reducing the steering torque applied by the driver to the steering wheel.

[0040] Reference Figure 3 As shown, the push rod 2 of the clearance compensation device 10 can apply a thrust to the worm shaft 202 in the direction close to the worm wheel 203. Specifically, the elastic member 4 is in a compressed state, and the elastic member 4 is suitable for applying an elastic force to the push rod 2 toward the worm shaft 202, so that the push rod 2 can apply a thrust to the worm shaft 202 toward the worm wheel 203 to eliminate the gap between the worm shaft 202 and the worm wheel 203, which is beneficial to reduce the wear between the worm wheel 203 and the worm shaft 202 and improve the service life of the steering transmission mechanism 20.

[0041] It can be understood that when assembling the clearance compensation device 10, the ejector rod 2 can be first installed into the installation through hole 11 of the plug body 1, then the elastic member 4 can be installed into the first hole section 111 of the plug body 1, and then the plug 3 can be pressed into the first hole section 111 in the direction close to the ejector rod 2, so as to complete the assembly of the clearance compensation device 10. The clearance compensation device 10 can be installed to the steering transmission mechanism 20 as an integral structure, which is beneficial to reducing the installation difficulty of the clearance compensation device 10.

[0042] Specifically, when assembling the clearance compensation device 10, a force measuring mechanism is provided at one end of the rod body 22 away from the rod head 21. The rod body 22 is adapted to abut against the force measuring mechanism, and the force measuring mechanism can limit the ejector rod 2 so that the ejector rod 2 is located at the elastic force detection position. The elastic force detection position can be a position where the rod head 21 of the ejector rod 2 is in the first hole section 111, and there is a 1 mm spacing between the connecting end face 113 of the second hole section 112 and the first hole section 111 and the rod head 21 in the axial direction of the installation through hole 11. When the plug 3 is pressed into the plug body 1 in the direction close to the ejector rod 2, the ejecting force value of the ejector rod 2 can be detected through the force measuring mechanism, that is, the elastic force of the elastic member 4 can be detected. When the elastic force of the elastic member 4 reaches the preset value, pressing the plug 3 is stopped so that the elastic force of the elastic member 4 is maintained at the preset value. By adopting the method of measuring the ejecting force of the ejector rod 2 while pressing the elastic member 4, when assembling multiple clearance compensation devices 10, it is beneficial to ensure the consistency of the ejecting force of the ejector rod 2 of each clearance compensation device 10.

[0043] The clearance compensation device 10 according to the embodiment of the present invention can be used to compensate for the clearance between the worm wheel 203 and the worm shaft 202 in the steering transmission mechanism 20 of the vehicle, which is beneficial to reducing the wear between the worm wheel 203 and the worm shaft 202 and improving the service life of the steering transmission mechanism 20. When the clearance compensation device 10 is installed to the steering transmission mechanism 20, the clearance compensation device 10 can be installed as an integral structure, which is beneficial to reducing the installation difficulty of the clearance compensation device 10.

[0044] In some embodiments of the present invention, the aperture of the first hole section 111 is D1, the aperture of the second hole section 112 is D2, the outer diameter of the rod head 21 is D3, and the outer diameter of the rod body 22 is D4, satisfying the relationship: D1≥D3>D2≥D4. That is to say, the aperture of the first hole section 111 is greater than or equal to the outer diameter of the rod head 21 to facilitate the movement of the rod head 21 along the axial direction of the first hole section 111. The outer diameter of the rod head 21 is greater than the aperture of the second hole section 112 to prevent the rod head 21 from coming out of the second hole section 112. That is to say, the connecting end face 113 of the second hole section 112 and the first hole section 111 can abut against the rod head 21 in the axial direction of the installation through hole 11 to realize the axial limit of the rod head 21 and prevent the rod head 21 from coming out through the second hole section 112. The aperture of the second hole section 112 is greater than or equal to the outer diameter of the rod body 22 to facilitate the movement of the rod body 22 along the axis direction of the second hole section 112.

[0045] In some embodiments of the present invention, referring to Figure 1 and Figure 2 As shown, the plug body 1 includes: a screw portion 12 and a plug head portion 13, the screw portion 12 has an external thread, the plug head portion 13 is connected to the screw portion 12, the plug head portion 13 and the screw portion 12 jointly define a mounting through hole 11, the second hole section 112 is located on the side of the screw portion 12 away from the plug head portion 13, and on a plane perpendicular to the axis of the mounting through hole 11, the projected area of ​​the plug head portion 13 is larger than the projected area of ​​the screw portion 12.

[0046] It can be understood that the external thread of the screw portion 12 is suitable for threaded connection with the housing 201 of the steering transmission mechanism 20. After the gap compensation device 10 is assembled, the gap compensation device 10 can be installed and disassembled by screwing the screw portion 12 into and out of the housing 201. The disassembly operation of the gap compensation device 10 is simple and convenient. The projected area of ​​the plug head 13 of the plug body 1 is larger than the projected area of ​​the screw portion 12. That is to say, referring to Figure 2 As shown, the outer diameter of the plug head 13 is larger than the outer diameter of the screw portion 12, and the end face of the plug head 13 close to the screw portion 12 can be used as a mounting end face 133. When the plug body 1 is installed to the shell 201, the mounting end face 133 is suitable for abutting against the plane limit position of the shell 201 to facilitate the installation and positioning of the plug body 1.

[0047] In some embodiments of the present invention, the axis of the mounting through hole 11, the axis of the screw portion 12 and the axis of the plug head portion 13 coincide with each other, and the mounting through hole 11, the screw portion 12 and the plug head portion 13 can be coaxially processed. Through coaxial processing, the mounting through hole 11, the screw portion 12 and the plug head portion 13 can be processed in the same workstation, which is beneficial to reduce the time required for workstation conversion, thereby facilitating improving the production efficiency of the plug body 1.

[0048] In some embodiments of the present invention, referring to Figure 1 As shown, the plug head 13 has a riveted limit strip 131. In the axial direction of the mounting through hole 11, the riveted limit strip 131 is suitable for abutting against the end of the plug 3 away from the elastic member 4 to limit the plug 3 and prevent the plug 3 from falling out of the mounting through hole 11. It can also prevent the plug 3 from moving away from the elastic member 4 to maintain the position of the plug 3 after assembly and maintain the compression amount of the elastic member 4, which is beneficial to ensure the consistency of the ejection force of the ejector rods 2 of multiple gap compensation devices 10.

[0049] Reference Figure 1As shown, when the plug 3 is not installed in the mounting through hole 11, on the plane perpendicular to the axis of the mounting through hole 11, the projection of the riveting limit strip 131 is located on the outside of the mounting through hole 11, so that the plug 3 can be installed in the mounting through hole 11. After the plug 3 is installed to the preset position, the riveting limit strip 131 can be riveted to deform the riveting limit strip 131 toward the axial direction close to the mounting through hole 11, and the riveting limit strip 131 is abutted against the end of the plug 3 away from the elastic member 4 to prevent the plug 3 from falling out of the mounting through hole 11 and to prevent the plug 3 from moving away from the elastic member 4, so as to maintain the position of the plug 3 after assembly and maintain the compression amount of the elastic member 4, which is beneficial to ensure the consistency of the ejection force of the ejector rods 2 of multiple gap compensation devices 10.

[0050] In some embodiments of the present invention, referring to Figure 1 As shown, the end of the plug head portion 13 facing away from the screw portion 12 has an assembly groove 132, and the assembly groove 132 is connected to the first hole section 111. In the radial direction of the mounting through hole 11, the assembly groove 132 at least partially corresponds to the plug 3. The assembly groove 132 can provide a space for adjusting the plug 3 so as to adjust the elastic force of the elastic member 4 to a preset value, which is beneficial to improving the convenience of assembly of the gap compensation device 10.

[0051] It is understandable that when pressing the plug 3 into the first hole section 111, it is necessary to detect the elastic force of the elastic member 4. When the elastic force of the elastic member 4 is greater than the preset value, the elastic member 4 is over-pressurized, and a tool such as a crowbar can be used to extend into the assembly groove 132 to pry the plug 3 so that the plug 3 moves away from the elastic member 4, thereby reducing the compression of the elastic member 4 and reducing the elastic force of the elastic member 4 to the preset value.

[0052] In some embodiments of the utility model, the plug 3 is interference fit with the inner wall of the first hole section 111. In the process of adjusting the elastic force of the elastic member 4 to a preset value, the plug 3 is interference fit with the inner wall of the first hole section 111 to limit the plug 3, so that the plug 3 is stuck in the first hole section 111, and the axial movement of the plug 3 along the first hole section 111 is avoided, so as to maintain the compression amount of the elastic member 4 and ensure the stability of the ejection force of the ejector rod 2. There is no need to use other components to limit the plug 3, which is beneficial to improving the convenience of assembly of the gap compensation device 10.

[0053] In some embodiments of the utility model, the elastic member 4 is a spring, which can be a compression spring, a gas spring, a butterfly spring, etc. After the gap compensation device 10 is assembled and installed in the steering transmission mechanism 20, the push rod 2 can apply a thrust toward the worm wheel 203 to the worm shaft 202 under the elastic force of the elastic member 4, so as to avoid a gap between the worm shaft 202 and the worm wheel 203, maintain precise transmission between the worm shaft 202 and the worm wheel 203, and help reduce the wear between the worm wheel 203 and the worm shaft 202, thereby improving the service life of the steering transmission mechanism 20.

[0054] Reference Figures 1 - 4 As shown, according to another embodiment of the utility model, the steering system 100 includes: a steering transmission mechanism 20 and a clearance compensation device 10, the steering transmission mechanism 20 includes: a housing 201, a worm shaft 202, a worm wheel 203 and a first bearing 204, the worm shaft 202 is rotatably connected to the housing 201 through the first bearing 204, the worm wheel 203 is engaged with the worm shaft 202, the clearance compensation device 10 is the clearance compensation device 10 of the above-mentioned embodiment, the plug body 1 is penetrated and fixed in the housing 201, in the radial direction of the first bearing 204, the rod body 22 is abutted against the side of the first bearing 204 away from the worm wheel 203, and the rod body 22 can indirectly apply a thrust toward the worm wheel 203 to the worm shaft 202 through the first bearing 204.

[0055] Reference Figure 4 As shown, the steering transmission mechanism 20 also includes a sealing cover 206 and an adjusting bushing 207. The sealing cover 206 is suitable for being fixedly connected to the housing 201, and is suitable for preventing leakage of the lubricating medium in the steering transmission mechanism 20. The adjusting bushing 207 is suitable for being fixedly connected to the housing 201. The adjusting bushing 207 can be used to support the first bearing 204. In the axial direction of the push rod 2, the adjusting bushing 207 is provided with a connecting hole 2071. The rod body 22 of the push rod 2 is suitable for penetrating the connecting hole 2071 and abutting against the outer ring of the first bearing 204. The rod body 22 can indirectly apply a thrust toward the worm wheel 203 to the worm shaft 202 through the first bearing 204, wherein the first bearing 204 can be a deep groove ball bearing.

[0056] According to the steering system 100 of the embodiment of the utility model, its clearance compensation device 10 can be used to compensate for the clearance between the worm wheel 203 and the worm shaft 202 in the steering transmission mechanism 20, which is beneficial to reduce the wear between the worm wheel 203 and the worm shaft 202 and improve the service life of the steering transmission mechanism 20. When the clearance compensation device 10 is installed to the steering transmission mechanism 20, the clearance compensation device 10 can be installed as an integrated structure, which is beneficial to reduce the difficulty of installing the clearance compensation device 10.

[0057] In some embodiments of the present invention, referring to Figure 3 As shown, the steering transmission mechanism 20 also includes: a second bearing 205, and the end of the worm shaft 202 away from the first bearing 204 is rotatably and swingably connected to the housing 201 through the second bearing 205. The worm shaft 202 has a tendency to swing toward the worm wheel 203 under the thrust of the top rod 2, and can automatically compensate for the gap between the worm shaft 202 and the worm wheel 203, wherein the second bearing 205 can be a swing bearing, a self-aligning bearing, etc.

[0058] In some embodiments of the present invention, referring to Figure 2As shown, the distance between the axis of the worm shaft 202 and the mounting end face 133 of the clearance compensation device 10 can be used to calculate the axial working dimensions of the clearance compensation device 10 that need to be ensured, that is, Figure 2 The sum of a and b, a is the length of the rod 22, b is the length of the screw part 12, and the axial dimensions such as the length of the plug 3, the length of the push rod 2, and the compression amount of the elastic member 4 can be set according to the working size, which can ensure the press-in position of the push rod 2, and the dimensional errors of other parts can be absorbed when the plug 3 is pressed into the plug body 1, reducing the accuracy requirements and reducing the cost. Among them, the length of the plug 3 can be 4mm, the length of the push rod 2 can be 10.5mm, and the compression amount of the elastic member 4 can be 4mm~4.5mm.

[0059] In some embodiments of the present invention, the installation steps of the gap compensation device 10 include:

[0060] Step S1: Install the ejector rod into the plug body.

[0061] The rod head 21 of the push rod 2 is matched with the first hole section 111 of the plug body 1 with a small gap, and the push rod 2 can slide axially in the mounting through hole 11 of the plug body 1 along the axis of the mounting through hole 11.

[0062] Step S2: Install the elastic member and the plug into the plug body in sequence.

[0063] Among them, in the direction toward the push rod 2, the plug 3 is pressed into the first hole section 111 of the plug body 1 with interference fit, and the push rod 2 is adjusted to the elastic force detection position, and the plug 3 continues to be pressed in. While pressing the plug 3, the ejection force value of the push rod 2 is detected. When the ejection force of the push rod 2 reaches a preset value, the operation of pressing in the plug 3 is stopped.

[0064] Step S3: Riveting the riveting limit strip to complete the assembly of the gap compensation device.

[0065] The riveting limit strip 131 abuts against one end of the plug 3 which faces away from the elastic member 4 , so as to prevent the plug 3 from falling out of the first hole section 111 of the plug body 1 .

[0066] Step S4: Install the clearance compensation device to the steering transmission mechanism.

[0067] The clearance compensation device 10 can be installed by screwing the screw portion 12 into the housing 201 of the steering transmission mechanism 20 and making the plug head 13 close to the end surface of the screw portion 12 abut against the plane limit position of the housing 201.

[0068] The clearance compensation device 10 according to an embodiment of the present utility model can be used in a column-assisted electric power steering system. The clearance compensation device 10 adopts an integrated structure, which ensures the working dimensions of the design and reduces the dimensional accuracy requirements of each component. The clearance compensation device 10 is installed on the steering transmission mechanism 20 after being assembled externally, which can reduce the assembly difficulty of the clearance compensation device 10 and solve problems such as the non-intuitive display of the adjustment result and the difficulty in measuring the elastic force after adjustment caused by adjusting the elastic force of the elastic member 4 after being installed in the steering transmission mechanism 20. Before the clearance compensation device 10 of the present embodiment is installed on the steering transmission mechanism 20, by pressing the elastic member 4 while measuring the ejection force of the ejector rod 2, when assembling multiple clearance compensation devices 10, it is beneficial to ensure the consistency of the ejection forces of the ejector rods 2 of the multiple clearance compensation devices 10. And because each clearance compensation device 10 measures the ejection force of the ejector rod 2 before being installed in the steering transmission mechanism 20, the press-in force parameter traceability of the plug 3 of each clearance compensation device 10 can be ensured through the measured data. The clearance compensation device 10 can solve the problem that the clearance between the worm shaft 202 and the worm wheel 203 cannot reach the ideal meshing position due to part tolerances, thermal expansion and contraction of parts, wear or creep of the plastic gear material, and can effectively reduce the risk of abnormal vibration and abnormal noise generated when the worm shaft 202 and the worm wheel 203 alternately collide on the tooth surface. In addition, when the clearance compensation device 10 is assembled during after-sales maintenance, there is no need to use special equipment to detect the input state on the steering wheel side, and only the plug body 1 needs to be tightened.

[0069] A vehicle according to another embodiment of the present utility model includes the above-mentioned steering system 100.

[0070] For a vehicle according to an embodiment of the present utility model, the clearance compensation device 10 can be used to compensate for the clearance between the worm wheel 203 and the worm shaft 202 in the steering transmission mechanism 20, which is beneficial to reducing the wear between the worm wheel 203 and the worm shaft 202 and improving the service life of the steering transmission mechanism 20. When the clearance compensation device 10 is installed on the steering transmission mechanism 20, the clearance compensation device 10 can be installed as an integrated structure, which is beneficial to reducing the installation difficulty of the clearance compensation device 10.

[0071] In the description of this specification, the descriptions with reference to terms such as "one embodiment", "some embodiments", "example", "specific example" or "some examples" mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine the different embodiments or examples described in this specification.

[0072] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A gap compensation device, characterized in that: include: A plug body (1), the plug body (1) having a mounting through hole (11), the mounting through hole (11) comprising: a first hole section (111) and a second hole section (112) connected to each other; A push rod (2), the push rod (2) comprising: a rod head (21) and a rod body (22), the rod head (21) being movably arranged in the first hole section (111), the rod body (22) being movably arranged in the second hole section (112), one end of the rod body (22) being connected to the rod head (21) in the axial direction of the mounting through hole (11), and the other end of the rod body (22) being located outside the mounting through hole (11); A plug (3), the plug (3) being installed in the first hole section (111); An elastic member (4), wherein in the axial direction of the mounting through hole (11), one end of the elastic member (4) abuts against the plug (3), and the other end of the elastic member (4) abuts against the rod head (21); Wherein, in the axial direction of the mounting through hole (11), the connecting end surface (113) of the first hole section (111) and the second hole section (112) stops the rod head (21) on the side of the rod head (21) facing away from the plug (3).

2. The gap compensation device according to claim 1, characterized in that: The aperture of the first hole section (111) is D1, the aperture of the second hole section (112) is D2, the outer diameter of the rod head (21) is D3, and the outer diameter of the rod shaft (22) is D4, satisfying the relationship: D1≥D3>D2≥D4.

3. The gap compensation device according to claim 1 or 2, characterized in that: The plug body (1) comprises: A screw portion (12), wherein the screw portion (12) has an external thread; A plug head portion (13), the plug head portion (13) is connected to the screw rod portion (12), the plug head portion (13) and the screw rod portion (12) jointly define the mounting through hole (11), the second hole section (112) is located on a side of the screw rod portion (12) away from the plug head portion (13), and on a plane perpendicular to the axis of the mounting through hole (11), the projected area of ​​the plug head portion (13) is larger than the projected area of ​​the screw rod portion (12).

4. The gap compensation device according to claim 3, characterized in that: The axis of the mounting through hole (11), the axis of the screw portion (12) and the axis of the plug portion (13) coincide with each other.

5. The gap compensation device according to claim 3, characterized in that: The plug head (13) has a riveting limit strip (131), and in the axial direction of the mounting through hole (11), the riveting limit strip (131) is suitable for abutting against an end of the plug (3) away from the elastic member (4).

6. The gap compensation device according to claim 3, characterized in that: The end of the plug portion (13) facing away from the screw portion (12) has an assembly groove (132), the assembly groove (132) is connected to the first hole section (111), and in the radial direction of the mounting through hole (11), the assembly groove (132) corresponds at least partially to the plug (3).

7. The gap compensation device according to claim 1, characterized in that: The plug (3) is interference fit with the inner wall of the first hole section (111).

8. A steering system, characterized in that: include: A steering transmission mechanism, the steering transmission mechanism comprising: a housing (201), a worm shaft (202), a worm wheel (203) and a first bearing (204), the worm shaft (202) being rotatably connected to the housing (201) via the first bearing (204), and the worm wheel (203) being meshed with the worm shaft (202); A clearance compensation device, wherein the clearance compensation device is a clearance compensation device according to any one of claims 1 to 7, wherein the plug body (1) is penetrated and fixed in the housing (201), and in the radial direction of the first bearing (204), the rod body (22) abuts against a side of the first bearing (204) facing away from the worm gear (203).

9. The steering system according to claim 8, characterized in that: The steering transmission mechanism further comprises a second bearing (205), and one end of the worm shaft (202) away from the first bearing (204) is rotatably and swingably connected to the housing (201) via the second bearing (205).

10. A vehicle, characterized in that: Comprising a steering system according to claim 8 or 9.

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