Compression mechanism and steering mechanism

Abstract

The application discloses a compression mechanism and a steering machine, and belongs to the technical field of vehicles. The compression mechanism comprises a locking piece, a first pressing block and a magnetic assembly, the magnetic assembly comprises a first magnetic piece and a second magnetic piece, the first magnetic piece is arranged on the locking piece, and the second magnetic piece is arranged on the first pressing block; wherein the opposite ends of the first magnetic piece and the second magnetic piece repel each other, so that the first pressing block moves in a direction away from the locking piece. The compression mechanism can provide stable pre-tightening force to prevent the gear and the rack from being loose, thereby avoiding or reducing the generation of steering false position and abnormal sound, and can also prolong the service life of the steering machine. At the same time, the friction and abnormal sound generated between the spring and other components due to vibration or uneven stress are avoided.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and more particularly to a clamping mechanism and a steering gear. Background Technology

[0002] In vehicle steering systems, rack and pinion steering gears are widely used due to their simple structure and high transmission efficiency. Their core function is to convert the driver's steering force into linear motion of the rack through the meshing of gears and racks, thereby achieving wheel steering. To ensure the precision, stability, and driving safety of steering operations, a precise meshing state between the gears and racks must be maintained. This typically requires a clamping mechanism to apply lateral pressure to the rack, preventing problems such as steering play and abnormal noise caused by excessive meshing clearance. The clamping mechanism is the key component for achieving this function.

[0003] In related technologies, clamping mechanisms often use springs to provide preload. This clamping mechanism provides axial force by compressing the spring, pushing the pressure block against the back of the rack to achieve backlash compensation. However, the compensation mechanism of this mechanism relies on the elastic force of the spring. If the spring fails (e.g., due to fatigue fracture, plastic deformation, or corrosion), the preload is lost, causing loose meshing between the gear and the rack, resulting in noise and steering play. Utility Model Content

[0004] This application provides a clamping mechanism and a steering gear. The clamping mechanism can provide a stable preload to prevent the gear and rack from loosening, thereby avoiding or reducing steering play and abnormal noise.

[0005] To achieve the above objectives, according to a first aspect of this application, a clamping mechanism is provided, comprising: a locking member, a first pressing block, and a magnetic assembly, wherein the magnetic assembly includes a first magnetic element and a second magnetic element, the first magnetic element being disposed on the locking member, and the second magnetic element being disposed on the first pressing block;

[0006] Wherein, the opposite ends of the first magnetic element and the second magnetic element repel each other, causing the first pressing block to move away from the locking element.

[0007] Optionally, the locking member has a first groove on the side facing the first pressure block, and the first magnetic member is disposed in the first groove;

[0008] The first pressure block has a second groove on the side facing the locking member, and the second magnetic member is disposed in the second groove.

[0009] Optionally, a first protrusion is provided in the second groove, and the second magnetic element is a ring structure, with the second magnetic element sleeved on the first protrusion.

[0010] Optionally, the clamping mechanism further includes a second pressing block disposed between the locking member and the first pressing block, and the magnetic component further includes a third magnetic member disposed on the second pressing block;

[0011] Wherein, the ends of the third magnetic element opposite to the first magnetic element attract each other, and the ends of the third magnetic element opposite to the second magnetic element repel each other; or...

[0012] The end of the third magnetic element opposite to the first magnetic element repels each other, while the end of the third magnetic element opposite to the second magnetic element attracts each other.

[0013] Optionally, the second pressing block is provided with a third groove, and the third magnetic element is disposed in the third groove;

[0014] The third groove is located on the side of the second pressing block facing the first pressing block; or, the third groove is located on the side of the second pressing block facing the locking member.

[0015] Optionally, the locking member has a fourth groove on the side facing the second pressure block, and the fourth groove is provided with a first sealing ring; and / or,

[0016] The outer circumferential surface of the first pressure block is provided with a fifth groove, and the fifth groove is provided with a second sealing ring; and / or,

[0017] The outer circumferential surface of the second pressure block is provided with a sixth groove, and the sixth groove is provided with a third sealing ring.

[0018] Optionally, the clamping mechanism further includes a liner disposed on the side of the first pressure block facing away from the locking member.

[0019] Optionally, the first pressing block has a seventh groove on the side facing the liner, and the liner has a second protrusion corresponding to the seventh groove on the side facing the first pressing block; and / or,

[0020] The liner has an eighth groove on the side facing away from the first pressure block, and the eighth groove is used to store lubricant.

[0021] Optionally, the clamping mechanism further includes a dust plug disposed at the end of the locking member away from the first pressure block.

[0022] According to a second aspect of this application, a steering gear is provided, comprising: a housing, a rack, a gear, and a clamping mechanism as described in any one of the above, wherein the rack and the gear are disposed within the housing and mesh with each other, the housing is provided with a mounting cavity, at least a portion of the clamping mechanism is disposed in the mounting cavity, a locking member is connected to the housing, and a first pressure block is movable axially along the mounting cavity, the first pressure block abutting against the side of the rack opposite to the gear.

[0023] In the clamping mechanism and steering gear of this application embodiment, compared with providing preload through a compression spring, this application uses the mutual repulsion between the opposite ends of the first and second magnetic components to cause the first pressure block to move away from the locking component. This ensures that the clamping mechanism can provide a stable preload, preventing loosening of the gear and rack meshing, thereby avoiding or reducing steering play and abnormal noise, and extending the service life of the steering gear. Simultaneously, it avoids friction and abnormal noise between the spring and other components caused by vibration or uneven force.

[0024] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying 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.

[0026] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0027] Figure 1 This is a cross-sectional schematic diagram of the steering gear provided in an exemplary embodiment of this disclosure;

[0028] Figure 2 This is a three-dimensional structural schematic diagram of the clamping mechanism provided in an exemplary embodiment of this disclosure;

[0029] Figure 3 yes Figure 2 A schematic diagram of the exploded structure of the clamping mechanism shown;

[0030] Figure 4 This is a schematic diagram of the planar structure of the clamping mechanism provided in an exemplary embodiment of this disclosure;

[0031] Figure 5 It is along Figure 4 Schematic diagram of the cross section of line AA in the middle;

[0032] Figure 6 This is a three-dimensional structural diagram of the locking member provided in an exemplary embodiment of this disclosure;

[0033] Figure 7 This is a three-dimensional structural diagram of the first pressing block provided in an exemplary embodiment of this disclosure from one perspective;

[0034] Figure 8 This is a three-dimensional structural schematic diagram of the first pressing block provided in an exemplary embodiment of this disclosure from another perspective;

[0035] Figure 9 This is a three-dimensional structural diagram of the second pressing block provided in an exemplary embodiment of this disclosure;

[0036] Figure 10 This is a three-dimensional structural schematic diagram of the liner provided in an exemplary embodiment of this disclosure from one perspective;

[0037] Figure 11 This is a three-dimensional structural schematic diagram of the liner provided in an exemplary embodiment of this disclosure from another perspective.

[0038] Explanation of reference numerals in the attached figures:

[0039] 100. Pressing mechanism; 1. Locking element; 11. First groove; 12. Fourth groove; 13. First through hole; 2. First pressing block; 21. Second groove; 22. First protrusion; 23. Fifth groove; 24. Seventh groove; 3. Magnetic component; 31. First magnetic element; 32. Second magnetic element; 33. Third magnetic element; 4. Second pressing block; 41. Third groove; 42. Sixth groove; 43. Second through hole; 5. First sealing ring; 6. Second sealing ring; 7. Third sealing ring; 8. Liner; 81. Second protrusion; 82. Eighth groove; 9. Dust plug; 200. Housing; 210. Mounting cavity; 300. Rack; 400. Gear. Detailed Implementation

[0040] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of this application and are not intended to limit this application. In this application, unless otherwise stated, directional terms such as "up," "down," "left," and "right" generally refer to up, down, left, and right in the actual use or working state of the device, specifically the drawing directions in the accompanying drawings.

[0041] In this application, unless otherwise expressly specified and limited, the terms "connected," "linked," "stacked," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two elements or the interaction between two elements. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0042] This application provides a clamping mechanism and a steering mechanism, which are described in detail below. It should be noted that the order of description of the following embodiments is not intended to limit the preferred order of the embodiments of this application. Furthermore, the descriptions of each embodiment have their own emphasis; parts not described in detail in a certain embodiment can be referred to in the relevant descriptions of other embodiments.

[0043] Reference Figures 1 to 3 One embodiment of this application provides a clamping mechanism 100, which can be applied to a steering gear. (See also...) Figure 1 The steering gear may include a housing 200, a rack 300, a gear 400, and a clamping mechanism 100. The steering gear can be used in the steering system of a vehicle to convert the driver's steering force into wheel steering action. The rack 300 and gear 400 are disposed within the housing 200 and mesh with each other. The housing 200 has a mounting cavity 210, and at least a portion of the clamping mechanism 100 is disposed within the mounting cavity 210. The shape of the mounting cavity 210 matches the external contour of the clamping mechanism 100. As an example, the mounting cavity 210 may be cylindrical to accommodate a locking member 1, a second clamping block 4, and a first clamping block 2, which are also cylindrically assembled.

[0044] Reference Figures 3 to 5 The clamping mechanism 100 may include a locking member 1, a first pressing block 2, and a magnetic assembly 3. The locking member 1 is connected to the housing 200, and the first pressing block 2 is axially movable along the mounting cavity 210. The first pressing block 2 abuts against the side of the rack 300 facing away from the gear 400.

[0045] Specifically, refer to Figure 1 The locking element 1 is used to connect with the housing 200 of the steering gear. It can not only fix the entire clamping mechanism 100, but also adjust the position of the locking element 1 and the housing 200 to adjust the axial movement of the clamping mechanism 100 along the mounting cavity 210, thereby adjusting the magnitude of the preload between the clamping mechanism 100 and the rack 300.

[0046] As an example, the locking element 1 can be a locking nut. The outer peripheral surface of the locking element 1 is provided with an external thread (not shown), which can be connected to the internal thread (not shown) on the inner wall of the mounting cavity 210 of the housing 200 through a threaded connection to achieve a detachable connection, facilitating subsequent installation, adjustment and maintenance. In some embodiments, the inner peripheral surface of the locking element 1 is provided with an internal thread (not shown), which can be connected to the external thread (not shown) on the outer peripheral surface of the housing 200 through a threaded connection to achieve detachable fixation.

[0047] Reference Figure 1 and Figure 5 One end of the first pressure block 2 faces the locking member 1, and the other end faces the rack 300. The first pressure block 2 abuts against the side of the rack 300 facing away from the gear 400. The first pressure block 2 can move axially along the mounting cavity 210 of the housing 200 to achieve dynamic compensation for the meshing clearance between the rack 300 and the gear 400. The first pressure block 2 can be cylindrical in shape. The outer diameter of the first pressure block 2 and the inner diameter of the mounting cavity 210 are fitted with a clearance. While ensuring that the first pressure block 2 can move freely along the axial direction, the radial displacement of the first pressure block 2 is restricted, ensuring that the preload is applied precisely in the direction of the rack 300.

[0048] Reference Figure 3 and Figure 5 The magnetic component 3 is the core component of the clamping mechanism 100, providing preload and achieving gap compensation. The magnetic component 3 replaces the traditional spring with magnetic repulsion and attraction between magnetic elements, avoiding problems such as spring fatigue failure and susceptibility to vibration. The magnetic component 3 may include a first magnetic element 31 and a second magnetic element 32. The first magnetic element 31 is disposed on the locking element 1, and the second magnetic element 32 is disposed on the first pressing block 2.

[0049] In this configuration, the opposite ends of the first magnetic element 31 and the second magnetic element 32 repel each other, causing the first pressing block 2 to move away from the locking element 1. This allows the first pressing block 2 to abut against the side of the rack 300 facing away from the gear 400, applying a preload to the rack 300 and thus dynamically compensating for the meshing gap between the rack 300 and the gear 400. As an example, the S-pole (South-seeking Pole) of the first magnetic element 31 and the S-pole of the second magnetic element 32 are positioned opposite each other, causing them to repel each other.

[0050] In this application, compared to providing preload through a compression spring, the first magnetic element 31 and the second magnetic element 32 repel each other at their opposite ends, causing the first pressure block 2 to move away from the locking element 1. This ensures that the clamping mechanism 100 can provide a stable preload, preventing the gear 400 and rack 300 from loosening during meshing. This avoids or reduces steering play and abnormal noise, allowing the driver's steering input to be accurately transmitted to the wheels, improving steering precision, driving comfort, and handling feel, and extending the service life of the steering gear. Simultaneously, it avoids friction and abnormal noise between the spring and other components caused by vibration or uneven force. Furthermore, the clamping mechanism 100 of this application has fewer parts, a more compact structure, and lower manufacturing and maintenance costs.

[0051] In some embodiments, refer to Figure 5 and Figure 6 A first groove 11 may be provided on the side of the locking member 1 facing the first pressure block 2, and a first magnetic member 31 is disposed in the first groove 11. The shape of the first groove 11 matches the shape of the first magnetic member 31. As an example, the first groove 11 is a circular groove, and the shape of the first magnetic member 31 is circular or annular. The size of the first groove 11 matches the size of the first magnetic member 31 to accommodate and fix the first magnetic member 31, ensuring that the first magnetic member 31 does not undergo radial displacement during operation. In some embodiments, the first groove 11 and the first magnetic member 31 are interference-fitted to further ensure the stability of the position of the first magnetic member 31. In some embodiments, the first magnetic member 31 can also be fixed to the first groove 11 by adhesive.

[0052] Reference Figure 5 and Figure 7 The first pressure block 2 has a second groove 21 on the side facing the locking member 1, and the second magnetic member 32 is disposed in the second groove 21. The shape of the second groove 21 matches the shape of the second magnetic member 32. As an example, the second groove 21 is a circular groove, and the shape of the second magnetic member 32 is circular or annular. The size of the second groove 21 matches the size of the second magnetic member 32 to accommodate and fix the second magnetic member 32, ensuring that the second magnetic member 32 does not undergo radial displacement during operation. In some embodiments, the second groove 21 and the second magnetic member 32 are interference-fitted to further ensure the stability of the position of the second magnetic member 32. In some embodiments, the second magnetic member 32 can also be fixed to the second groove 21 by adhesive.

[0053] In some embodiments, refer to Figure 5 and Figure 7A first protrusion 22 can be provided within the second groove 21. In this case, the second magnetic element 32 has an annular structure and can be fitted onto the first protrusion 22. The first protrusion 22 can be a cylindrical protrusion, and it can be integrally formed with the first pressure block 2. The inner diameter of the second magnetic element 32 matches the outer diameter of the first protrusion 22, and it is fixed by fitting onto the first protrusion 22 and embedding it into the second groove 21. This not only radially positions the second magnetic element 32, preventing it from rotating or shifting during operation, but also increases the contact area between the second magnetic element 32 and the first pressure block 2, improving the stability of the fixation and preventing the second magnetic element 32 from loosening due to vibration. In some embodiments, the first protrusion 22 and the second magnetic element 32 are interference-fitted to further ensure the stability of the position of the second magnetic element 32. In some embodiments, the second magnetic element 32 and the first protrusion 22 can also be fixedly connected by an adhesive.

[0054] In some embodiments, refer to Figure 3 and Figure 5 The clamping mechanism 100 may further include a second clamping block 4, which is disposed between the locking member 1 and the first clamping block 2. The magnetic component 3 may further include a third magnetic member 33, which is disposed on the second clamping block 4. The second clamping block 4 may be cylindrical in shape, and its outer diameter is clearance-fitted with the inner diameter of the mounting cavity 210. This ensures that the second clamping block 4 can move freely along the axial direction while restricting its radial displacement. This, combined with the force of the magnetic component 3, adjusts its position and ensures the stable transmission of the magnetic force.

[0055] In this embodiment, the ends of the third magnetic element 33 and the first magnetic element 31 opposite each other attract each other, while the ends of the third magnetic element 33 and the second magnetic element 32 opposite each other repel each other; or, the ends of the third magnetic element 33 and the first magnetic element 31 opposite each other repel each other, while the ends of the third magnetic element 33 and the second magnetic element 32 opposite each other attract each other. As an example, the S pole of the first magnetic element 31 and the N pole (North-seeking Pole) of the third magnetic element 33 are arranged opposite each other, so that the first magnetic element 31 and the third magnetic element 33 attract each other, and the S pole of the third magnetic element 33 and the S pole of the second magnetic element 32 are arranged opposite each other, so that the third magnetic element 33 and the second magnetic element 32 repel each other. A magnetic attraction force is generated between the first magnetic element 31 and the third magnetic element 33 along the axial direction. This magnetic attraction force can drive the second pressing block 4 to move towards the locking element 1, keeping the second pressing block 4 and the locking element 1 in a tight relative position, thus achieving axial positioning of the second pressing block 4 and preventing unnecessary axial movement of the second pressing block 4 under vibration. At the same time, it ensures the stability of the relative position between the third magnetic element 33 and the second magnetic element 32, providing a guarantee for the stable transmission of magnetic repulsion force. The magnetic repulsion force between the third magnetic element 33 and the second magnetic element 32, together with the magnetic attraction force between the first magnetic element 31 and the third magnetic element 33, jointly determine the total magnetic thrust applied to the first pressing block 2, thereby increasing the magnetic repulsion force on the second magnetic element 32.

[0056] The first magnetic component 31, the second magnetic component 32, and the third magnetic component 33 can all be permanent magnets; alternatively, they can all be electromagnets; or, some of them can be permanent magnets, while the rest can be electromagnets. Permanent magnets, such as neodymium iron boron permanent magnets, have advantages such as high energy product, high coercivity, and strong remanence, maintaining stable magnetic properties during long-term use and ensuring a constant preload. The magnetic strength of the electromagnet can be adjusted by regulating the current flowing through it, thereby adjusting the magnetic force of the first magnetic component 31, the second magnetic component 32, and the third magnetic component 33, and consequently, the preload. The types of the first magnetic component 31, the second magnetic component 32, and the third magnetic component 33 can be selected according to actual needs.

[0057] In some embodiments, refer to Figure 5 and Figure 9The second pressing block 4 may be provided with a third groove 41, and the third magnetic element 33 may be disposed in the third groove 41. The shape of the third groove 41 matches the shape of the third magnetic element 33. As an example, the third groove 41 is a circular groove, and the shape of the third magnetic element 33 is circular or annular. The size of the third groove 41 matches the size of the third magnetic element 33 to accommodate and fix the third magnetic element 33, ensuring that the third magnetic element 33 does not undergo radial displacement during operation. In some embodiments, the third groove 41 and the third magnetic element 33 are interference-fitted to further ensure the positional stability of the third magnetic element 33. In some embodiments, the third magnetic element 33 can also be fixed to the third groove 41 by adhesive.

[0058] The third groove 41 can be disposed on the side of the second pressing block 4 facing the first pressing block 2; or, the third groove 41 can be disposed on the side of the second pressing block 4 facing the locking member 1. In this embodiment, the third groove 41 is disposed on the side of the second pressing block 4 facing the first pressing block 2, so that the distance between the third magnetic member 33 and the second magnetic member 32 is closer, thereby enhancing the magnetic repulsion between the third magnetic member 33 and the second magnetic member 32.

[0059] Reference Figure 6 The locking element 1 also has a first through hole 13 extending axially along the mounting cavity 210, penetrating the locking element 1. In this case, the first magnetic element 31 is annular in shape. The first groove 11, the first magnetic element 31, and the first through hole 13 can be coaxially arranged. (Refer to...) Figure 9 The second pressure block 4 is also provided with a second through hole 43 extending axially along the mounting cavity 210, and the second through hole 43 penetrates the second pressure block 4. At this time, the third magnetic component 33 is annular in shape. The third groove 41, the third magnetic component 33 and the second through hole 43 can be coaxially arranged. The first through hole 13 and the second through hole 43 are coaxially arranged to form an inspection channel penetrating the clamping mechanism 100, which is convenient for observing the condition of internal parts or for adjusting with tools.

[0060] In some embodiments, refer to Figure 5 and Figure 6 A fourth groove 12 may be provided on the side of the locking member 1 facing the second pressure block 4, and a first sealing ring 5 may be provided in the fourth groove 12. The fourth groove 12 may be an annular groove, surrounding the outside of the first groove 11, and is used to install the first sealing ring 5. When the locking member 1 and the second pressure block 4 are assembled, the first sealing ring 5 is compressed between them, filling the mating gap, and achieving end face sealing between the locking member 1 and the second pressure block 4. This prevents dust and impurities from entering the mechanism or lubricating oil from the mating gap between the locking member 1 and the second pressure block 4, thus affecting the performance of the magnetic component 3 and the normal movement of each component.

[0061] Reference Figure 5 and Figure 8 The outer circumferential surface of the first pressure block 2 can be provided with a fifth groove 23, and the fifth groove 23 can be provided with a second sealing ring 6. The fifth groove 23 can be an annular groove, surrounding the outer circumferential surface of the first pressure block 2, and is used to install the second sealing ring 6. The outer diameter of the second sealing ring 6 is designed to form an interference fit with the inner wall of the mounting cavity 210 after installation. When the first pressure block 2 is assembled in the mounting cavity 210, the second sealing ring 6 is in close contact with the inner wall of the mounting cavity 210, forming a radial seal to prevent the leakage of lubricating oil inside the pressing mechanism 100, and further blocking the entry of external impurities, ensuring smooth axial movement of the first pressure block 2. At the same time, the friction between the second sealing ring 6 and the inner wall of the mounting cavity 210 can also play a certain damping role, reducing the axial sway of the first pressure block 2 in a vibration environment and improving the vibration resistance of the mechanism.

[0062] Reference Figure 5 and Figure 9 The outer circumferential surface of the second pressure block 4 can be provided with a sixth groove 42, and the sixth groove 42 can be provided with a third sealing ring 7. The sixth groove 42 can be an annular groove, surrounding the outer circumferential surface of the second pressure block 4, and is used to install the third sealing ring 7. The outer diameter of the third sealing ring 7 is designed to form an interference fit with the inner wall of the mounting cavity 210 after installation. After assembly, it is in close contact with the inner wall of the mounting cavity 210 to form a radial seal. Together with the second sealing ring 6, it further enhances the overall sealing performance of the pressing mechanism 100, preventing lubricating oil leakage and impurities from entering. At the same time, the friction between the third sealing ring 7 and the inner wall of the mounting cavity 210 can also play a certain damping role, reducing the axial sway of the second pressure block 4 under vibration environment and improving the vibration resistance of the mechanism.

[0063] The first sealing ring 5, the second sealing ring 6, and the third sealing ring 7 can be made of the same material. For example, the first sealing ring 5, the second sealing ring 6, and the third sealing ring 7 can be made of nitrile rubber, which has good oil resistance, wear resistance, and sealing performance.

[0064] In some embodiments, refer to Figure 5 and Figure 10The clamping mechanism 100 may further include a liner 8, which is disposed on the side of the first pressure block 2 facing away from the locking member 1. The liner 8 directly contacts the side of the rack 300 facing away from the gear 400, and is used to transmit the preload applied by the first pressure block 2 and reduce frictional wear between the first pressure block 2 and the rack 300. The side of the liner 8 that contacts the rack 300 is a concave arc-shaped surface, and its curvature matches the curvature of the back of the rack 300 to ensure large-area uniform contact and to ensure that the liner 8 and the rack 300 can fit tightly together, thereby ensuring that the preload is stably and evenly transmitted to the rack 300, preventing the gear 400 and the rack 300 from meshing loosely, and thus avoiding or reducing steering play and abnormal noise.

[0065] The liner 8 can be made of high-strength engineering plastic, such as polytetrafluoroethylene (PTFE). This material has excellent wear resistance, self-lubrication and corrosion resistance, and can maintain a low coefficient of friction without additional lubrication, reducing wear on the surface of the rack 300, while avoiding or reducing abnormal noise caused by direct metal-to-metal contact.

[0066] In some embodiments, refer to Figure 5 and Figure 10 A seventh groove 24 can be provided on the side of the first pressure block 2 facing the liner 8, and a second protrusion 81 corresponding to the seventh groove 24 can be provided on the side of the liner 8 facing the first pressure block 2. Through an interference fit, the second protrusion 81 is embedded in the seventh groove 24, achieving a fixed connection between the liner 8 and the first pressure block 2. This ensures that the liner 8 and the first pressure block 2 move synchronously, preventing relative sliding of the liner 8 during the axial movement of the rack 300, and ensuring the stability and uniformity of the preload transmission.

[0067] Reference Figure 5 and Figure 11 An eighth groove 82 may be provided on the side of the liner 8 facing away from the first pressure block 2. The eighth groove 82 may be an arc-shaped groove, used to store lubricant, such as lubricating oil. When the liner 8 contacts and slides relative to the rack 300, the lubricating oil stored in the eighth groove 82 is slowly released, forming an oil film on the contact surface of the liner 8 and the rack 300, further reducing the coefficient of friction between them, reducing wear, thereby reducing noise and improving driving comfort. At the same time, it also plays a cooling role, removing the heat generated by friction and extending the service life of the liner 8 and the rack 300. The number of eighth grooves 82 may be one or more. As an example, there may be multiple eighth grooves 82, which are evenly distributed on the side of the liner 8 facing the rack 300, ensuring that the lubricating oil can evenly cover the contact surface of the liner 8 and the rack 300, ensuring consistent lubrication effect.

[0068] In some embodiments, refer to Figure 2 and Figure 3 The clamping mechanism 100 may further include a dust plug 9, which is located at the end of the locking member 1 furthest from the first pressure block 2. The dust plug 9 is used to seal the first through hole 13 of the locking member 1. The dust plug 9 prevents external dust, moisture, impurities, etc., from entering the clamping mechanism 100, protecting core components such as the first magnetic component 31, the second magnetic component 32, and the third magnetic component 33 from contamination and corrosion. The dust plug 9 may be made of silicone rubber, which has good elasticity, sealing properties, and resistance to high and low temperatures. It can adapt to temperature changes in the working environment of the vehicle steering system (-40℃~120℃) and is not prone to aging. The dust plug 9 has a cylindrical structure, with its outer diameter slightly larger than the inner diameter of the first through hole 13 of the locking member 1. It is fixed to the locking member 1 by an interference fit, and after assembly, it can tightly fit the inner wall of the first through hole 13, ensuring a sealing effect. In addition, the upper end of the dust plug 9 is provided with a protruding structure (not shown) that is easy to disassemble. When it is necessary to inspect or maintain the inside of the clamping mechanism 100, the dust plug 9 can be pulled out by hooking the protruding structure with a tool, which is convenient to operate.

[0069] During vehicle operation, the rack 300 and gear 400 will wear due to long-term meshing, resulting in an increased meshing gap between them. Additionally, the liner 8 will wear over time. The clamping mechanism 100 can achieve dynamic compensation through the action of the magnetic component 3. For example, when the rack 300 or liner 8 wears, the gap between the rack 300 and gear 400 increases. At this time, the magnetic repulsion between the third magnetic component 33 and the second magnetic component 32 will push the first pressure block 2 to continue moving downwards, causing the liner 8 to move downwards synchronously until the liner 8 makes close contact with the rack 300 again, filling the increased gap, maintaining stable preload, and ensuring that the rack 300 and gear 400 always remain meshed, thereby avoiding steering play.

[0070] In the description of this application, 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. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0071] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0072] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0073] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A clamping mechanism, characterized in that, include: The lock includes a locking element, a first pressing block, and a magnetic assembly, wherein the magnetic assembly includes a first magnetic element and a second magnetic element, the first magnetic element being disposed on the locking element and the second magnetic element being disposed on the first pressing block; Wherein, the opposite ends of the first magnetic component and the second magnetic component repel each other, causing the first pressing block to move away from the locking component.

2. The clamping mechanism according to claim 1, characterized in that, The locking member has a first groove on the side facing the first pressure block, and the first magnetic member is disposed in the first groove; The first pressure block has a second groove on the side facing the locking member, and the second magnetic member is disposed in the second groove.

3. The clamping mechanism according to claim 2, characterized in that, The second groove is provided with a first protrusion, and the second magnetic component is a ring structure, which is sleeved on the first protrusion.

4. The clamping mechanism according to claim 1, characterized in that, The clamping mechanism further includes a second pressing block, which is disposed between the locking member and the first pressing block; the magnetic component further includes a third magnetic member, which is disposed between the second pressing block. Wherein, the ends of the third magnetic element opposite to the first magnetic element attract each other, and the ends of the third magnetic element opposite to the second magnetic element repel each other; or... The end of the third magnetic element opposite to the first magnetic element repels each other, while the end of the third magnetic element opposite to the second magnetic element attracts each other.

5. The clamping mechanism according to claim 4, characterized in that, The second pressing block is provided with a third groove, and the third magnetic element is disposed in the third groove; The third groove is located on the side of the second pressing block facing the first pressing block; or, the third groove is located on the side of the second pressing block facing the locking member.

6. The clamping mechanism according to claim 4, characterized in that, The locking member has a fourth groove on the side facing the second pressure block, and the fourth groove is provided with a first sealing ring; and / or, The outer circumferential surface of the first pressure block is provided with a fifth groove, and the fifth groove is provided with a second sealing ring; and / or, The outer circumferential surface of the second pressure block is provided with a sixth groove, and the sixth groove is provided with a third sealing ring.

7. The clamping mechanism according to claim 1, characterized in that, The clamping mechanism further includes a liner, which is disposed on the side of the first pressure block facing away from the locking member.

8. The clamping mechanism according to claim 7, characterized in that, The first pressing block has a seventh groove on the side facing the liner, and the liner has a second protrusion corresponding to the seventh groove on the side facing the first pressing block; and / or, The liner has an eighth groove on the side facing away from the first pressure block, and the eighth groove is used to store lubricant.

9. The clamping mechanism according to claim 1, characterized in that, The clamping mechanism also includes a dust plug, which is disposed at the end of the locking member away from the first pressure block.

10. A steering gear, characterized in that, include: The device comprises a housing, a rack, a gear, and a clamping mechanism as described in any one of claims 1 to 9, wherein the rack and the gear are disposed within the housing and mesh with each other, the housing has a mounting cavity, at least a portion of the clamping mechanism is disposed in the mounting cavity, the locking member is connected to the housing, the first pressure block is movable axially along the mounting cavity, and the first pressure block abuts against the side of the rack facing away from the gear.

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