Steering gear, electric steering system and vehicle

Abstract

The utility model discloses a steering gear, an electric steering system and a vehicle. The steering gear comprises a transmission assembly and a clearance compensation assembly. The transmission assembly comprises a worm gear and a worm, and the worm gear is in transmission fit with the worm. The clearance compensation assembly comprises a guide part, an eccentric part and an elastic part, the eccentric part is connected with the worm and the elastic part and used for providing driving force under driving of the elastic part, the guide part is connected with the eccentric part, arranged on the worm in a sleeving mode and used for guiding the direction of the driving force so as to drive the worm to move in the first direction, and the first direction is the direction close to the worm wheel. Thus, abrasion between the worm gear and the worm can be compensated automatically, it is ensured that driving force can be accurately applied to the worm, compensation is stable, and stable operation of an electric steering system can be ensured.

Description

Technical Field

[0001] The present application relates to the technical field of electric steering, and in particular to a steering gear, an electric steering system and a vehicle. Background Art

[0002] The electric power steering system is a steering system that provides auxiliary torque through the motor. Since the motor of the electric power steering system has a high speed and a small torque, a mechanism is needed to reduce the speed and increase the torque. Currently, a worm gear reducer is used. However, due to structural limitations, the worm gear reducer will wear out after working for a period of time, generating gaps, generating abnormal noises during switching, and affecting the steering accuracy. Utility Model Content

[0003] The embodiments of the present application provide a steering gear, an electric steering system and a vehicle to solve at least one of the above-mentioned technical problems.

[0004] The steering device of the embodiment of the present application includes:

[0005] A transmission assembly, the transmission assembly comprising a worm wheel and a worm, the worm wheel and the worm are in transmission cooperation;

[0006] A clearance compensation component, the clearance compensation component includes a guide member, an eccentric member and an elastic member, the eccentric member is respectively connected to the worm and the elastic member, the eccentric member is used to provide a driving force under the drive of the elastic member, the guide member is connected to the eccentric member and is sleeved on the worm, and is used to guide the direction of the driving force to drive the worm to move in a first direction, and the first direction is a direction close to the worm wheel.

[0007] In some embodiments, the eccentric member includes a first eccentric member and a second eccentric member, the first eccentric member is sleeved on one end of the worm, the second eccentric member is sleeved on the first eccentric member, and the elastic member is arranged between the first eccentric member and the second eccentric member. Under the drive of the elastic member, the first eccentric member and the second eccentric member rotate relative to each other to provide the driving force.

[0008] In certain embodiments, the clearance compensation assembly further includes a bearing, wherein the bearing is sleeved on the worm, the eccentric member is sleeved on the bearing, and one end of the bearing abuts against the guide member.

[0009] In some embodiments, the first eccentric member is provided with a first connecting structure; and

[0010] The second eccentric member is provided with a second connecting structure, and two ends of the elastic member are suitable for respectively abutting against the first connecting structure and the second connecting structure.

[0011] In some embodiments, a retaining ring is provided at an end portion of an outer ring of the first eccentric member, and the second eccentric member abuts against the retaining ring.

[0012] In some embodiments, the first eccentric member is provided with a first circumferential boss, the diameter of the first circumferential boss is smaller than the inner diameter of the second eccentric member, and the inner wall of the second eccentric member is suitable for cooperating with the outer periphery of the first circumferential boss.

[0013] In some embodiments, the first eccentric member is provided with a second circumferential boss, the second circumferential boss is arranged at the center of the first circumferential boss, the diameter of the second circumferential boss is smaller than the diameter of the first circumferential boss to form a first plane, and the first plane is suitable for placing part of the elastic member.

[0014] In some embodiments, the first connecting structure is disposed on the first plane, and one side of the first connecting structure is suitable for abutting against an end portion of the elastic member.

[0015] In some embodiments, the outer shell of the second eccentric member is recessed inwardly, and the recessed portion formed thereby constitutes a second connecting structure, and one side of the second connecting structure is suitable for abutting against the other end portion of the elastic member.

[0016] In certain embodiments, the elastic member comprises a cylindrical coil spring.

[0017] In certain embodiments, the steering gear further comprises: a housing, wherein the transmission assembly and the clearance compensation assembly are both disposed in the housing.

[0018] In some embodiments, the guide member is provided with a first matching portion, and the shell is provided with a second matching portion at a position corresponding to the first matching portion, and the first matching portion cooperates with the second matching portion to guide the direction of the driving force provided by the eccentric member.

[0019] In some embodiments, the first matching portion is a groove structure, and the second matching portion is a protrusion structure; or

[0020] The first matching portion is a guide rail structure, and the second matching portion is a slider structure.

[0021] In certain embodiments, the steering gear further comprises a fastener adapted to compress the clearance compensation assembly against the housing.

[0022] In some embodiments, at least one of the first eccentric member and the second eccentric member is an elastic element.

[0023] The electric power steering system according to the embodiment of the present application includes a motor and a steering gear according to any one of the above embodiments.

[0024] In certain embodiments, the electric steering system is a column-assisted electric steering gear, a pinion-assisted electric steering gear, or a rack-assisted electric steering gear.

[0025] The vehicle according to the embodiment of the present application includes the electric power steering system according to any one of the above embodiments.

[0026] In the steering gear, electric steering system and vehicle of the embodiments of the present application, the eccentric member, under the drive of the elastic member, provides a driving force to press the worm onto the worm wheel, and guides the direction of the driving force through the guide member. In this way, the wear between the worm wheel and the worm can be automatically compensated, ensuring that the driving force can be accurately applied to the worm and the compensation is stable, thereby ensuring the stable operation of the electric steering system.

[0027] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the following briefly introduces the drawings required for use in the embodiments or related technical descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without creative work. Among them:

[0029] Figure 1 is a schematic diagram of the assembly structure of a steering gear in certain embodiments of the present application;

[0030] Figure 2 is a schematic diagram of the exploded structure of a steering gear in certain embodiments of the present application;

[0031] Figure 3 is a schematic diagram of a module of a steering device in certain embodiments of the present application;

[0032] Figure 4 is a schematic structural diagram of a first eccentric member in certain embodiments of the present application;

[0033] Figure 5 is a schematic structural diagram of a second eccentric member in certain embodiments of the present application;

[0034] Figure 6 is a schematic diagram of a module of an electric power steering system according to certain embodiments of the present application;

[0035] Figure 7 It is a schematic diagram of the structure of a vehicle of certain embodiments of the present application.

[0036] Description of reference numerals:

[0037] Steering gear 100, housing 10, guide member 20, eccentric member 30, first eccentric member 31, first connecting structure 311, retaining ring 312, first circumferential boss 313, second circumferential boss 314, first plane 315, second eccentric member 32, second connecting structure 321, elastic member 40, bearing 50, fastener 60, transmission assembly 110, worm 112, worm wheel 111, clearance compensation assembly 120, electric steering system 300, motor 310, vehicle 1000. DETAILED DESCRIPTION

[0038] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions from beginning to end. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0039] See also Figures 1 to 3 , an embodiment of the present application provides a steering gear 100. The steering gear 100 includes a transmission assembly 110 and a clearance compensation assembly 120. The transmission assembly 110 includes a worm wheel 111 and a worm 112, and the worm wheel 111 and the worm 112 are in transmission cooperation. The clearance compensation assembly 120 includes a guide member 20, an eccentric member 30 and an elastic member 40. The eccentric member 30 is connected to the worm 112 and the elastic member 40, respectively, and the eccentric member 30 is used to provide a driving force under the drive of the elastic member 40. The guide member 20 is connected to the eccentric member 30 and is sleeved on the worm 112, and is used to guide the direction of the driving force to drive the worm 112 to move in a first direction, and the first direction is a direction close to the worm wheel 111.

[0040] In the steering gear 100 of the embodiment of the present application, the eccentric member 30, under the drive of the elastic member 40, provides a driving force to press the worm 112 against the worm wheel 111, and guides the direction of the driving force through the guide member 20. In this way, the wear between the worm wheel 111 and the worm 112 can be automatically compensated, ensuring that the driving force can be accurately applied to the worm 112, and the compensation is stable, which can ensure the stable operation of the electric steering system 300.

[0041] Specifically, the steering gear 100 includes a transmission assembly 110 and a clearance compensation assembly 120. The transmission assembly 110 includes a worm wheel 111 and a worm 112. The worm 112 is a cylinder with a spiral protrusion. The worm wheel 111 is provided with a tooth groove that can mesh with the spiral protrusion. The tooth groove of the worm wheel 111 meshes with the spiral protrusion of the worm 112 to achieve transmission cooperation between the worm wheel 111 and the worm 112. When the worm 112 rotates, the rotation of the worm 112 causes the worm wheel 111 to move in the axial direction. Conversely, the axial movement of the worm wheel 111 causes the rotation of the worm 112.

[0042] The clearance compensation assembly 120 includes a guide member 20, an eccentric member 30 and an elastic member 40. The guide member 20 can be made of nylon or any other wear-resistant material. The eccentric member 30 is connected to the worm 112 and the elastic member 40 respectively. The eccentric member 30 can be sleeved on the worm 112. The eccentric member 30, driven by the elastic member 40, provides a driving force to press the worm 112 onto the worm wheel 111.

[0043] The guide member 20 is connected to the eccentric member 30, and the guide member 20 is sleeved on the worm 112, so that the guide member 20 can guide the direction of the driving force provided by the eccentric member 30, ensuring that the driving force can be accurately applied to the worm 112, so that the worm 112 moves in a first direction under the action of the driver, and the first direction is the direction close to the worm wheel 111.

[0044] During normal operation of the electric steering system 300, the steering gear 100 can maintain a constant pressing force to press the worm 112 against the worm wheel 111 to ensure that the electric steering system 300 is stable. When the electric steering system 300 is impacted, the steering gear 100 can absorb the impact energy and protect the weak parts of the electric steering system 300.

[0045] In the related technology, there is no guide mechanism, and the gap between the worm wheel and the worm can only be adjusted by workers' experience and force feeling. The clamping force is unstable and cannot be adjusted automatically. Alternatively, no manual adjustment is required, but the end of the worm will swing in two directions after being stressed, resulting in unstable centering and compensation, which affects the performance of the electric steering system.

[0046] In the embodiment of the present application, the eccentric member 30 is used to provide a driving force to press the worm 112 onto the worm wheel 111 under the drive of the elastic member 40, and the guide member 20 is connected to the eccentric member 30, and the guide member 20 can guide the direction of the driving force provided by the eccentric member 30. In this way, through the guidance of the guide member 20, the wear between the worm wheel 111 and the worm 112 can be automatically compensated, ensuring that the driving force can be accurately applied to the worm 112, and the compensation is stable, which can ensure the stable operation of the electric steering system 300.

[0047] See also Figure 1 , Figure 4 and Figure 5 In some embodiments, the eccentric member 30 includes a first eccentric member 31 and a second eccentric member 32. The first eccentric member 31 is sleeved on one end of the worm 112, and the second eccentric member 32 is sleeved on the first eccentric member 31. The elastic member 40 is arranged between the first eccentric member 31 and the second eccentric member 32. Under the drive of the elastic member 40, the first eccentric member 31 and the second eccentric member 32 rotate relative to each other to provide driving force.

[0048] Specifically, the eccentric member 30 includes a first eccentric member 31 and a second eccentric member 32, and the first eccentric member 31 and the second eccentric member 32 are eccentrically matched. The first eccentric member 31 and the second eccentric member 32 are both non-centrally symmetrical structures. The first eccentric member 31 is connected to the guide member 20, and the second eccentric member 32 can be sleeved on the first eccentric member 31 along a specific direction.

[0049] When the second eccentric member 32 is sleeved on the first eccentric member 31, the elastic member 40 is located between the first eccentric member 31 and the second eccentric member 32, and can store energy to provide energy for the first eccentric member 31 and the second eccentric member 32 to move in opposite directions, and provide a clamping force for the first eccentric member 31 and the second eccentric member 32. It should be noted that the elastic member 40 of the embodiment of the present application needs to meet the condition of small elastic change during the working stroke, so that a stable force can be provided to the first eccentric member 31 and the second eccentric member 32. The elastic member 40 may include a spring or any other elastic or energy storage device, which is not limited here. For example, the elastic member 40 may be a cylindrical helical spring.

[0050] The setting of the elastic member 40 enables the eccentric member 30 to have a stable self-locking function and will not move in the opposite direction due to external force. The eccentric member 30 cooperates with the swingable bearing 50 at the end of the motor 310 of the electric steering system 300, so that the wear between the worm wheel 111 and the worm 112 can be automatically compensated, ensuring that the worm 112 is always in contact with the worm wheel 111 and is in a meshing state without side clearance.

[0051] The first eccentric member 31 includes a first eccentric member 31 extending along the axial direction of the steering device 100 (eg Figure 2 The first eccentric member 31 and the second eccentric member 32 are arranged on the first eccentric member 31 and the second eccentric member 32 are arranged on the first eccentric member 31 and the second eccentric member 32 are arranged on the second eccentric member 32. The rotation center axes of the first eccentric member 31 and the second eccentric member 32 are not in a straight line, forming an eccentric distance; when the first eccentric member 31 and the second eccentric member 32 rotate in opposite directions under the drive of the elastic member 40, a torque difference is generated. Due to the existence of the torque difference, the first eccentric member 31 and the second eccentric member 32 can generate a driving force when they rotate in opposite directions.

[0052] See also Figure 1 , Figure 4 and Figure 5 In some embodiments, at least one of the first eccentric member 31 and the second eccentric member 32 is an elastic element.

[0053] Specifically, since the electric steering system 300 may be subjected to reverse force shock and temperature shock during operation, in order to absorb these shocks, at least one of the first eccentric member 31 and the second eccentric member 32 is designed as a non-metallic element to absorb these shocks. For example, at least one of the first eccentric member 31 and the second eccentric member 32 can be designed as an elastic element. When the electric steering system 300 is impacted, the elastic element can absorb the impact and recover quickly after the impact, so that the worm 112 and the worm wheel 111 can quickly return to a side clearance-free meshing state without rebounding. In this way, the electric steering system 300 can operate stably in both normal and fluctuating states. In addition, at least one of the first eccentric member 31 and the second eccentric member 32 is designed as an elastic element, which can also reduce friction to a certain extent, which is conducive to the first eccentric member 31 and the second eccentric member 32 rotating in opposite directions.

[0054] See also Figure 1 and Figure 2 In some embodiments, the steering gear 100 further includes a bearing 50 , and the bearing 50 is sleeved on the worm 112 . The eccentric member 30 is sleeved on the bearing 50 , and one end of the bearing 50 abuts against the guide member 20 .

[0055] Specifically, the bearing 50 may be a rolling bearing, which is sleeved on the worm 112 and may be disposed between the worm 112 and the eccentric member 30. The bearing 50 includes two opposite ends along the axial direction of the worm 112, wherein one end close to the worm wheel 111 abuts against the guide member 20. Since the worm 112 rotates rapidly during operation, while the eccentric member 30 rotates slowly, the provision of the bearing 50 may separate the worm 112 from the eccentric member 30 to prevent the eccentric member 30 from heating up.

[0056] See also Figure 1 and Figure 2 In some embodiments, the steering gear 100 further includes a fastener 60 , which is sleeved on the first eccentric member 31 and presses the second eccentric member 32 , the first eccentric member 31 and the guide member 20 to the housing 10 in sequence.

[0057] Specifically, the fastener 60 is sleeved on the second end of the first eccentric member 31, and can be sleeved on a part of the second end located outside the second eccentric member 32. The fastener 60 can press the second eccentric member 32, the first eccentric member 31 and the guide member 20 to the housing 10 in sequence, so that the guide member 20, the bearing 50, the first eccentric member 31, the elastic member 40, the second eccentric member 32 and the fastener 60 can be used as a whole. In this way, the integrated design facilitates assembly, reduces the assembly requirements for each component, and reduces the sensitivity of the gap adjustment during primary assembly.

[0058] See also Figure 1 , Figure 4 and Figure 5In some embodiments, the first eccentric member 31 is provided with a first connecting structure 311, and the second eccentric member 32 is provided with a second connecting structure 321, and both ends of the elastic member 40 are suitable for abutting against the first connecting structure 311 and the second connecting structure 321 respectively.

[0059] Specifically, the first connection structure 311 is used to connect with the first adjustment tool. The second connection structure 321 is used to connect with the second adjustment tool. The two ends of the elastic member 40 abut against the first connection structure 311 and the second connection structure 321 respectively. When the first adjustment tool cooperates with the second adjustment tool, the first eccentric member 31 and the second eccentric member 32 can be driven to rotate, the elastic member 40 is pressed, and the first eccentric member 31 and the second eccentric member 32 are aligned with the worm 112 and the housing 10 at the same time, so that during the operation of the electric steering system 300, the eccentric member 30 can provide driving force for the worm 112.

[0060] See also Figure 4 In some embodiments, a retaining ring 312 is provided at the outer ring end of the first eccentric member 31 , and the second eccentric member 32 abuts against the retaining ring 312 .

[0061] Specifically, a retaining ring 312 is provided at the outer ring end of the first eccentric member 31 away from the worm wheel 111. When the second eccentric member 32 is sleeved on the first eccentric member 31, the second eccentric member 32 abuts against the retaining ring 312. The retaining ring 312 is used to limit the relative position relationship between the first eccentric member 31 and the second eccentric member 32.

[0062] See also Figure 1 , Figure 4 and Figure 5 In some embodiments, the first eccentric member 31 is provided with a first circumferential boss 313 , the diameter of the first circumferential boss 313 is smaller than the inner diameter of the second eccentric member 32 , and the inner wall of the second eccentric member 32 is suitable for cooperating with the outer periphery of the first circumferential boss 313 .

[0063] Specifically, the first eccentric member 31 is provided with a first circumferential boss 313, and the diameter of the first circumferential boss 313 is smaller than the inner diameter of the second eccentric member 32, so that the second eccentric member 32 can be sleeved on the first eccentric member 31. When the second eccentric member 32 is sleeved on the first eccentric member 31, the inner wall of the second eccentric member 32 cooperates with the outer periphery of the first circumferential boss 313.

[0064] See also Figure 1 and Figure 4 In some embodiments, the first eccentric member 31 is provided with a second circumferential boss 314, and the second circumferential boss 314 is arranged at the center position of the first circumferential boss 313. The diameter of the second circumferential boss 314 is smaller than the diameter of the first circumferential boss 313 to form a first plane 315, and the first plane 315 is suitable for placing part of the elastic member 40.

[0065] Specifically, a second circumferential boss 314 is formed at the center of the first circumferential boss 313. The first circumferential boss 313 corresponds to the position of the first end of the first eccentric member 31, and the second circumferential boss 314 corresponds to the position of the second end of the first eccentric member 31. The diameter of the second circumferential boss 314 is smaller than the diameter of the first circumferential boss 313. The offset positions of the first circumferential boss 313 and the second circumferential boss 314 form a first plane 315, and the elastic member 40 is at least partially placed on the first plane 315. When the second eccentric member 32 is sleeved on the first eccentric member 31, the first plane 315 is located inside the second eccentric member 32, so that the elastic member 40 is located between the first eccentric member 31 and the second eccentric member 32.

[0066] See also Figure 1 and Figure 4 In some embodiments, the first connection structure 311 is disposed on the first plane 315 , and one side of the first connection structure 311 is suitable for abutting against the end of the elastic member 40 .

[0067] Specifically, the first connection structure 311 is disposed on the first plane 315, and the first connection structure 311 is in a convex shape, and the convexity is formed by the first circumferential boss 313 protruding outward along the axial direction, or is formed by the second circumferential boss 314 protruding outward along the radial direction. The first connection structure 311 includes two opposite sides perpendicular to the first plane 315, and when the elastic member 40 is placed on the first plane 315, the end of the elastic member 40 abuts against one side of the first connection structure 311.

[0068] See also Figure 1 and Figure 5 In some embodiments, the outer shell of the second eccentric member 32 is recessed inwardly, and the recessed portion formed constitutes a second connecting structure 321 , and one side of the second connecting structure 321 is suitable for abutting against the other end of the elastic member 40 .

[0069] Specifically, the top of any position of the housing of the second eccentric member 32 and the side wall at the corresponding position are recessed inward, and the recessed portion formed constitutes the second connection structure 321. The second connection structure 321 includes two opposite sides perpendicular to the first plane 315. When the second eccentric member 32 is sleeved on the first eccentric member 31, the elastic member 40 is located between the first eccentric member 31 and the second eccentric member 32, and the other end of the elastic member 40 (that is, the end not abutting against the first connection structure 311) abuts against one side of the second connection structure 321.

[0070] See also Figure 1 and Figure 2 In some embodiments, the steering gear 100 further includes: a housing 10 , a transmission assembly 110 and a clearance compensation assembly 120 are both disposed in the housing 30 .

[0071] Specifically, the housing 10 may be made of metal to protect the transmission assembly 110 and the clearance compensation assembly 120 disposed therein.

[0072] In other related technologies, compensation is performed by levers, which occupy a large space and are not suitable for working environments such as vehicles that have strict dimensional requirements. Alternatively, compensation is performed by spring sheets, but the elastic modulus is too large, resulting in a large attenuation in a small distance, and a hole needs to be opened in the shell, which will cause serious sealing problems.

[0073] In the embodiment of the present application, the gap compensation is performed based on the guide member 20 and the eccentric member 30, and the guide member 20 and the eccentric member 30 are both arranged in the housing 10. In this way, the guide member 20 and the eccentric member 30 are smaller in size, more suitable for application in the vehicle 1000, and there is no need to open a hole in the housing 10, so the sealing performance of the housing 10 can be maintained.

[0074] See also Figure 1 and Figure 2 In some embodiments, the guide member 20 is provided with a first matching portion, and the housing 10 is provided with a second matching portion at a position corresponding to the first matching portion, and the first matching portion cooperates with the second matching portion to guide the direction of the driving force provided by the eccentric member 30.

[0075] Specifically, the guide member 20 is provided with a first matching portion, and the housing 10 is provided with a second matching portion at a position corresponding to the first matching portion, and the first matching portion matches the second matching portion to achieve matching between the guide member 20 and the housing 10. The guide member 20 is fixed to the housing 10 through matching between the first matching portion and the second matching portion, and is sleeved on the worm 112. When the worm 112 rotates, the guide member 20 is fixed to guide the direction of the driving force provided by the eccentric member 30, ensuring that the driving force can be accurately applied to the worm 112.

[0076] In some embodiments, the first matching portion is a groove structure, and the second matching portion is a protrusion structure.

[0077] The first matching portion is a guide rail structure, and the second matching portion is a slider structure.

[0078] Specifically, the first matching portion of the guide member 20 may be a groove structure, and in this case, the second matching portion may be a protrusion structure. The positions of the groove structure and the protrusion structure correspond to each other, and the protrusion structure may move along the track of the groove structure to adjust the position of the guide member in the housing 10. When the guide member 20 is at the target position, the guide member 20 may be fixed to the housing 10 by a locking member provided on the groove structure or the protrusion structure, or the guide member 20 may be fixed to the housing 10 by any other locking method.

[0079] The first matching portion of the guide member 20 may be a guide rail structure, and in this case, the second matching portion may be a slider structure. The positions of the guide rail structure and the slider structure correspond to each other, and the slider structure may move along the track of the guide rail structure to adjust the position of the guide member in the housing 10. When the guide member 20 is at the target position, the guide member 20 may be fixed to the housing 10 by a locking member provided on the guide rail structure or the slider structure, or the guide member 20 may be fixed to the housing 10 by any other locking method.

[0080] See also Figure 6 The embodiment of the present application further provides an electric power steering system 300. The electric power steering system 300 includes a motor 310 and a steering gear 100 of any of the above embodiments.

[0081] Specifically, when the electric steering system 300 is working, it receives a steering signal input from the steering wheel, and the computer sends a command to the motor 310 according to the steering signal. The motor 310 rotates to provide additional steering torque, and the steering torque is transmitted through the steering gear 100 to assist steering.

[0082] See also Figure 6 In some embodiments, the electric steering system 300 is a column-assisted electric steering gear, a pinion-assisted electric steering gear, or a rack-assisted electric steering gear. Thus, the electric steering system 300 has a wide range of applications.

[0083] See also Figure 7 The embodiment of the present application further provides a vehicle 1000. The vehicle 1000 includes the electric power steering system 300 of any of the above embodiments.

[0084] Specifically, the power generated by the motor 310 in the electric power steering system 300 can help the driver to steer the vehicle 1000, so that the driver has a comfortable driving experience.

[0085] In summary, in the steering gear 100, the electric steering system 300 and the vehicle 1000 of the embodiment of the present application, the eccentric member 30, driven by the elastic member 40, provides a driving force to press the worm 112 against the worm wheel 111, and guides the direction of the driving force through the guide member 20. In this way, the wear between the worm wheel 111 and the worm 112 can be automatically compensated, ensuring that the driving force can be accurately applied to the worm 112, and the compensation is stable, which can ensure the stable operation of the electric steering system 300.

[0086] In the description of the present application, 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", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application 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 therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0087] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0088] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0089] The disclosure above provides many different embodiments or examples to realize the different structures of the present application. In order to simplify the disclosure of the present application, the parts and settings of specific examples are described above. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides various specific processes and examples of materials, but those of ordinary skill in the art can appreciate the application of other processes and / or the use of other materials.

[0090] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "example", "specific example", "some examples", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0091] Although the embodiments of the present application have been shown and described above, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A steering gear (100), characterized in that: include: A transmission assembly (110), the transmission assembly (110) comprising a worm wheel (111) and a worm (112), the worm wheel (111) and the worm (112) being in transmission cooperation with each other; A clearance compensation component (120), the clearance compensation component (120) comprising a guide member (20), an eccentric member (30) and an elastic member (40), the eccentric member (30) being connected to the worm (112) and the elastic member (40) respectively, the eccentric member (30) being used to provide a driving force under the drive of the elastic member (40), the guide member (20) being connected to the eccentric member (30) and being sleeved on the worm (112) for guiding the direction of the driving force to drive the worm (112) to move in a first direction, wherein the first direction is a direction close to the worm wheel (111).

2. The steering gear (100) according to claim 1, characterized in that: The eccentric member (30) comprises a first eccentric member (31) and a second eccentric member (32); the first eccentric member (31) is sleeved on one end of the worm (112); the second eccentric member (32) is sleeved on the first eccentric member (31); the elastic member (40) is arranged between the first eccentric member (31) and the second eccentric member (32); under the drive of the elastic member (40), the first eccentric member (31) and the second eccentric member (32) rotate relatively to provide the driving force.

3. The steering gear (100) according to claim 1, characterized in that: The clearance compensation assembly (120) further comprises a bearing (50), wherein the bearing (50) is sleeved on the worm (112), the eccentric member (30) is sleeved on the bearing (50), and one end of the bearing (50) abuts against the guide member (20).

4. The steering gear (100) according to claim 2, characterized in that: The first eccentric member (31) is provided with a first connecting structure (311); and The second eccentric member (32) is provided with a second connection structure (321), and two ends of the elastic member (40) are suitable for respectively abutting against the first connection structure (311) and the second connection structure (321).

5. The diverter (100) according to claim 4, characterized in that: A retaining ring (312) is provided at the outer ring end of the first eccentric piece (31), and the second eccentric piece (32) abuts against the retaining ring (312).

6. The diverter (100) according to claim 5, characterized in that: The first eccentric member (31) is provided with a first circumferential boss (313), the diameter of the first circumferential boss (313) is smaller than the inner diameter of the second eccentric member (32), and the inner wall of the second eccentric member (32) is suitable for matching with the outer periphery of the first circumferential boss (313).

7. The diverter (100) according to claim 6, characterized in that: The first eccentric member (31) is provided with a second circumferential boss (314), and the second circumferential boss (314) is arranged at the center of the first circumferential boss (313). The diameter of the second circumferential boss (314) is smaller than the diameter of the first circumferential boss (313) to form a first plane (315), and the first plane (315) is suitable for placing part of the elastic member (40).

8. The diverter (100) according to claim 7, characterized in that: The first connecting structure (311) is arranged on the first plane (315), and one side of the first connecting structure (311) is suitable for abutting against the end of the elastic member (40).

9. The diverter (100) according to claim 4, characterized in that: The outer shell of the second eccentric member (32) is recessed inwards, and the recessed portion formed thereby constitutes a second connecting structure (321), and one side of the second connecting structure (321) is suitable for abutting against the other end of the elastic member (40).

10. The steering gear (100) according to claim 1, characterized in that: The elastic member (40) comprises a cylindrical helical spring.

11. The steering gear (100) according to claim 1, characterized in that: The steering gear (100) further comprises: a housing (10), wherein the transmission assembly (110) and the clearance compensation assembly (120) are both arranged in the housing (10).

12. The steering gear (100) according to claim 11, characterized in that: The guide member (20) is provided with a first matching portion, and the housing (10) is provided with a second matching portion at a position corresponding to the first matching portion, and the first matching portion matches the second matching portion to guide the direction of the driving force provided by the eccentric member (30).

13. The diverter (100) according to claim 12, characterized in that: The first matching portion is a groove structure, and the second matching portion is a protrusion structure; or The first matching portion is a guide rail structure, and the second matching portion is a slider structure.

14. The diverter (100) according to claim 11, characterized in that: The steering gear (100) further comprises a fastener (60), wherein the fastener (60) is suitable for pressing the clearance compensation assembly (120) against the housing (10).

15. The diverter (100) according to claim 2, characterized in that: At least one of the first eccentric member (31) and the second eccentric member (32) is an elastic element.

16. An electric power steering system (300), characterized in that: It comprises a motor (310) and a steering gear (100) as claimed in any one of claims 1 to 15.

17. The electric power steering system (300) according to claim 16, characterized in that: The electric steering system (300) is a column-assisted electric steering gear, a pinion-assisted electric steering gear or a rack-assisted electric steering gear.

18. A vehicle (1000), characterized in that: Comprising the electric power steering system (300) as claimed in claim 16 or 17.

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