Rotation limiting device, steering system and rotation limiting method

Abstract

The invention discloses a rotation limiting device, a steering system and a rotation limiting method.The rotation limiting device comprises a steering component, a transmission component, a stop component and a mounting base, the steering component and the transmission component are rotatably mounted on the mounting base, the transmission component comprises a transmission block and a three-blade shifting piece, and the stop component limits the rotation range of the transmission block; the three-blade plectrum is provided with three plectrum branches, the steering component is provided with a steering plectrum, when the steering plectrum rotates to make contact with the middle plectrum branch, the steering component drives the transmission component to rotate, when the steering plectrum is separated from the middle plectrum branch, the transmission block abuts against the stop component, and when the steering plectrum rotates in the same direction to make contact with the end plectrum branches, the transmission block abuts against the stop component. The transmission part limits rotation of the steering part, and when the steering shifting piece reversely rotates to make contact with the end shifting piece branch, the transmission part rotates back. The steer-by-wire hard stop point can restrain the rotation stroke of a steering component, fills the blank in the field of steer-by-wire hard stop points when applied to a steering system, and meanwhile reduces rotation friction force.

Description

Technical Field

[0001] The invention relates to the technical field of rotation limiting, and in particular to a rotation limiting device, a steering system and a rotation limiting method. Background Art

[0002] At present, the interior design of automobile products pursues more and more sense of technology and innovation. As an emerging technology in the field of steering, the wire control system does not maintain a certain restraint force on the steering wheel during dynamic operation, unlike the traditional mechanical power steering system. Because the steering wheel and the wheel are completely controlled by electronic control, if the rotation stroke is not defined or constrained during the turnover of the steering wheel, the steering wheel is completely in a free idling state. Therefore, it is necessary to introduce the concept of hard stop point of the steering system to prevent the steering wheel from losing the restraint force similar to the traditional steering system, causing misoperation or idling.

[0003] The prior art discloses a rotation limiting device, in which the column converts the part exceeding 360° to within 360° through a reduction ratio or loop nesting. However, the reduction ratio solution causes defects such as increased friction in all travels of the steering wheel, complex structure, increased energy consumption, and poor NVH. The loop nesting method uses two layers of rings to limit the position exceeding 360°. This method also increases friction in all travels. After long-term operation, the slide rail is highly worn, and it is easy to get stuck or feel abnormal. At the same time, the movable slider is very likely to cause impact problems.

[0004] Therefore, how to provide a rotation limiting device that, when applied to a steering system, can effectively control the hard stop position of the steering wheel rotation, reduce the friction contact area and friction stroke, reduce the rotational friction, and make up for the current technical defects in this field is a technical problem that technical personnel in this field urgently need to solve. Summary of the invention

[0005] The purpose of the present invention is to provide a rotation limiting device, a steering system and a rotation limiting method. When applied to a steering system, the hard stop position of the steering wheel rotation can be effectively controlled, and the friction contact area and friction stroke can be reduced, the rotational friction force can be reduced, and the current technical defects in this field can be compensated.

[0006] In order to solve the above technical problems, the present invention provides a rotation limiting device, comprising a steering component, a transmission component, a stop component and a mounting seat, wherein both the steering component and the transmission component can be relatively rotatably mounted on the mounting seat, the transmission component comprises a transmission block and a three-leaf paddle connected in one body, the stop component is fixed to the mounting seat, the stop component is used to limit the rotation range of the transmission block, the three-leaf paddle has three paddle branches, the steering component has a steering paddle, and the outlines of the steering paddle and the three-leaf paddle are designed as follows:

[0007] The steering paddle can be rotated to contact or disengage with any of the paddle branches, and when the steering paddle is rotated to contact with the middle paddle branch, the steering component can drive the transmission component to rotate synchronously, when the steering paddle is rotated to disengage from the middle paddle branch, the transmission block abuts against the stop component, and when the steering paddle continues to rotate in the same direction until it contacts the paddle branch at the corresponding end, the transmission component limits the rotation of the steering component, and when the steering paddle is rotated in the opposite direction until it contacts the paddle branch at the corresponding end, the steering paddle can push the transmission component to rotate, and when the steering paddle is rotated in the opposite direction until it disengages from the paddle branch at the corresponding end, the transmission component returns to its initial position.

[0008] The rotation limiting device of the present invention is provided with a steering component, a transmission component, a stop component and a mounting seat, wherein the mounting seat is used as the mounting base of the entire structure for mounting the steering component, the transmission component and the stop component, and the steering component is used for connecting with a power input component. Taking the application of the rotation limiting device of the present invention to a steering system as an example, the power input component is a steering wheel. In the initial state, the steering paddle is located on the side facing away from the three-leaf paddle, and the transmission block is located at the zero position. When the steering wheel rotates counterclockwise, the steering wheel drives the transmission component to rotate counterclockwise synchronously, and the steering paddle rotates 180 degrees. °, it first engages with the paddle branch in the middle of the three-leaf paddle; then, the steering paddle drives the transmission component to rotate counterclockwise as a whole. When the steering paddle rotates to disengage from the paddle branch in the middle, the transmission block abuts against the stop block and can no longer rotate. However, the steering wheel can continue to rotate counterclockwise, thereby driving the transmission component to continue to rotate counterclockwise as a whole. When the steering paddle continues to rotate about 360° until it abuts against the paddle branch at the left end of the three-leaf paddle, the steering wheel can no longer rotate counterclockwise. This position is the hard stop point for the steering wheel to rotate counterclockwise.

[0009] Afterwards, the steering wheel can be rotated clockwise, that is, it rotates in the opposite direction from the hard stop position of counterclockwise rotation to start the rotation process. The steering wheel drives the transmission component to rotate clockwise synchronously. When the transmission component rotates approximately 360°, the steering paddle contacts the paddle branch at the left end of the three-leaf paddle. The paddle branch can rotate clockwise under the push of the steering paddle, thereby driving the transmission component to rotate clockwise as a whole. When the steering paddle rotates to disengage from the paddle branch at the left end, the three-leaf paddle rotates back to the initial position. The clockwise rotation process of the steering wheel is similar to the counterclockwise rotation process, which will not be repeated here.

[0010] It can be seen that the present invention utilizes transmission components and stop components to control the end position of the steering component's rotation stroke, thereby effectively constraining the steering component's rotation stroke. When the rotation limiting device of the present invention is applied to a steering system, the steering component is connected to the steering wheel, thereby realizing the control of the end position of the steering wheel's rotation stroke, effectively constraining the steering wheel's rotation stroke, and filling the gap in the field of hard stop points for wire-controlled steering. It can effectively ensure the precise control of the steering wheel's rotation stroke under normal working conditions, and effectively prevent the steering wheel from idling due to accidental operation when the vehicle is powered off. At the same time, compared with the rotation limiting device of the prior art, the present invention can effectively reduce the friction contact area and friction stroke during the stopping process, thereby reducing the rotational friction.

[0011] Optionally, the steering component also includes a steering sleeve, a steering shaft and a fixed structure, the fixed structure fixedly connecting the end wall of the steering sleeve and the corresponding side wall of the mounting seat, the rotating shaft portion is rotatably arranged inside the steering sleeve, the steering paddle is arranged on the peripheral wall of the rotating shaft close to one end of the mounting seat, and the steering paddle is at least partially exposed from the steering sleeve.

[0012] Optionally, the transmission component also includes a transmission shaft, which rotatably passes through the mounting seat, and the transmission block and the three-leaf paddle are both connected to the transmission shaft, and the transmission block and the three-leaf paddle are respectively arranged on both sides of the mounting seat.

[0013] Optionally, the steering paddle and / or the paddle branches are processed with buffer material at least on the surfaces of the positions where they contact each other.

[0014] Optionally, the stopping component comprises two stopping blocks, the two stopping blocks are symmetrically arranged and have a spacing, the transmission block is located between the two stopping blocks, and the rotation center of the transmission block is located on the symmetry axis of the stopping component.

[0015] Optionally, a resisting component is also included, which includes an elastic member and a ball, the elastic member extends along the symmetry axis of the stop member, one end of the elastic member is fixed to the mounting seat, and the ball is connected to the other end of the elastic member, and the elastic member is in an energy storage state to press the ball against the peripheral wall of the transmission block.

[0016] Optionally, a groove is provided at the free end of the transmission block, and when the transmission block is located at an initial position, the ball is pressed into the groove, and the ball can also be forced to break away from the groove.

[0017] Optionally, the abutting component further comprises a limiting slide rail fixed to the mounting seat, a guide groove extending along the symmetry axis direction of the stopping component is formed inside the limiting slide rail, and the elastic member and the ball are installed in the guide groove.

[0018] The present invention also provides a steering system, comprising a steering wheel and the aforementioned rotation limiting device, wherein the steering wheel is connected to a steering component in the rotation limiting device.

[0019] The steering system of the present invention includes the aforementioned rotation limiting device, and therefore has the same technical effect as the aforementioned rotation limiting device, which will not be described in detail herein.

[0020] The present invention also provides a rotation limiting method, which is applicable to the above-mentioned rotation limiting device and comprises the following steps:

[0021] The steering component rotates along the rotation direction, and when the steering paddle rotates to contact the paddle branch in the middle, the steering component drives the transmission component to rotate synchronously, and when the steering paddle rotates to disengage from the paddle branch in the middle, the transmission block abuts against the stop component, and when the steering paddle continues to rotate in the same direction to contact the paddle branch at the corresponding end, the transmission component limits the rotation of the steering component, and when the steering paddle rotates in the opposite direction to contact the paddle branch at the corresponding end, the steering paddle pushes the transmission component to rotate, and when the steering paddle rotates in the opposite direction to disengage from the paddle branch at the corresponding end, the transmission component returns to the initial position.

[0022] The rotation limiting method of the present invention is applicable to the aforementioned rotation limiting device, and therefore has the same technical effect as the aforementioned rotation limiting device, which will not be described in detail herein. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic structural diagram of a specific embodiment of the rotation limiting device provided in this application;

[0024] Figure 2 for Figure 1 A partial cross-sectional view of a second angle of the rotation limiting device;

[0025] Figure 3 for Figure 1 A schematic diagram of the partial structure of the third angle in the rotation limiting device;

[0026] Figure 4 for Figure 1 A schematic diagram of the structure of the steering component and the transmission component in the rotation limiting device;

[0027] Figure 5 for Figure 1 A schematic diagram of the partial structure of the fourth angle in the rotation limiting device;

[0028] Figure 6 for Figure 1 A cross-sectional view of an abutment member in a rotation limiting device;

[0029] Figure 7A schematic structural diagram of a specific embodiment of the steering system provided in this application;

[0030] Figure 8 for Figure 7 A schematic diagram of the structure of the connection between the steering wheel and the steering component;

[0031] Fig. 9 for Figure 7 A schematic diagram of the structure of the steering system in the initial position;

[0032] Fig.10 for Fig. 9 A partial enlarged view of

[0033] Fig.11 for Figure 7 Schematic diagram of the structure when the steering system is rotated until the steering paddle contacts the middle paddle branch;

[0034] Fig.12 for Fig.11 A partial enlarged view of

[0035] Fig.13 for Fig.11 Schematic diagram of the structure when the steering system is rotated until the steering paddle is disengaged from the middle paddle branch;

[0036] Fig.14 for Fig.13 A partial enlarged view of

[0037] Fig.15 for Fig.13 A schematic diagram of the structure when the steering system is rotated until the steering paddle contacts the end paddle branch;

[0038] Fig.16 for Fig.15 A partial enlarged view of

[0039] Fig.17 for Fig.15 A first state diagram of the steering system rotating in the reverse direction;

[0040] Fig.18 for Fig.17 A partial enlarged view of

[0041] Fig.19 for Fig.15 A second state diagram of the steering system rotating in the reverse direction;

[0042] Fig. 20 for Fig.19 A partial enlarged view of

[0043] Fig.21 for Fig.19 A schematic diagram of the structure when the steering system is rotated until the steering paddle contacts the end paddle branch;

[0044] Fig. 22 for Fig.21 A partial enlarged view of

[0045] Fig.23 for Fig.21 A schematic diagram of the structure of the steering system when the steering paddle is rotated to disengage from the end paddle branch;

[0046] Fig.24 for Fig.23 A partial enlarged view of

[0047] in, Figure 1-Figure 24 The reference numerals in the figures are described as follows:

[0048] 1-steering component; 11-steering paddle; 12-steering sleeve; 13-steering shaft; 14-fixing structure;

[0049] 2-transmission component; 21-transmission block; 21a-groove; 22-three-leaf paddle; 221-paddle branch; 23-transmission shaft;

[0050] 3-stop component; 31-stop block;

[0051] 4-Mounting seat;

[0052] 5-abutting member; 51-elastic member; 52-ball; 53-limiting slide rail; 531-first limiting portion; 532-second limiting portion; 53a-arc groove; 54-base;

[0053] 01-steering wheel; 011-steering wheel rim; 012-steering wheel hub; 013-steering wheel rotation input shaft. DETAILED DESCRIPTION

[0054] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0055] The “plurality” mentioned herein generally means more than two; and when “plurality” is used to indicate the number of certain components, it does not indicate the relationship between the quantities of these components.

[0056] Please refer to Figure 1-Figure 7 , Figure 1 A schematic structural diagram of a specific embodiment of the rotation limiting device provided in this application; Figure 2 for Figure 1 A partial cross-sectional view of a second angle of the rotation limiting device; Figure 3 for Figure 1 A schematic diagram of the partial structure of the third angle in the rotation limiting device; Figure 4 for Figure 1A schematic diagram of the structure of the steering component and the transmission component in the rotation limiting device; Figure 5 for Figure 1 A schematic diagram of the partial structure of the fourth angle in the rotation limiting device; Figure 6 for Figure 1 A cross-sectional view of an abutment member in a rotation limiting device; Figure 7 This is a schematic structural diagram of a specific embodiment of the steering system provided in this application.

[0057] The present invention provides a rotation limiting device, comprising a steering component 1, a transmission component 2, a stop component 3 and a mounting seat 4. The steering component 1 and the transmission component 2 can be relatively rotatably mounted on the mounting seat 4. The transmission component 2 comprises a transmission block 21 and a three-leaf paddle 22 connected in one body. The stop component 3 is fixed to the mounting seat 4. The stop component 3 is used to limit the rotation range of the transmission block 21. The three-leaf paddle 22 has three paddle branches 221. The steering component 1 has a steering paddle 11. The outlines of the steering paddle 11 and the three-leaf paddle 22 are designed as follows:

[0058] The steering paddle 11 can be rotated to contact or disengage with any paddle branch 221, and when the steering paddle 11 is rotated to contact with the middle paddle branch 221, the steering component 1 drives the transmission component 2 to rotate synchronously, when the steering paddle 11 is rotated to disengage from the middle paddle branch 221, the transmission block 21 abuts against the stop component 3, and when the steering paddle 11 continues to rotate in the same direction until it contacts the paddle branch 221 at the corresponding end, the transmission component 2 can limit the rotation of the steering component 1, and when the steering paddle 11 is rotated in the opposite direction until it contacts the paddle branch 221 at the corresponding end, the steering paddle 11 can push the transmission component 2 to rotate, and when the steering paddle 11 is rotated in the opposite direction until it disengages from the paddle branch 221 at the corresponding end, the transmission component 2 returns to the initial position.

[0059] It should be noted that the initial position mentioned here is also the zero position, which means that with this position as the starting point, the clockwise rotation stroke and the counterclockwise rotation stroke of the transmission component 2 are consistent.

[0060] The rotation limiting device of the present invention is provided with a steering component 1, a transmission component 2, a stop component 3 and a mounting seat 4, wherein the mounting seat 4 is used as the mounting base of the entire structure for mounting the steering component 1, the transmission component 2 and the stop component 3. The steering component 1 is used to connect with a power input component. Taking the application of the rotation limiting device of the present invention to a steering system as an example, the power input component is a steering wheel 01. In the initial state, Fig. 9 and Fig.10As shown, the steering paddle 11 is located on the side facing away from the three-leaf paddle 22, and the transmission block 21 is located at the zero position. When the steering wheel 01 rotates counterclockwise, the steering wheel 01 drives the transmission component 2 to rotate counterclockwise synchronously. After the steering paddle 11 rotates 180°, it first engages with the paddle branch 221 located in the middle of the three-leaf paddle 22, as shown in FIG. Fig.11 and Fig.12 Then, the steering paddle 11 drives the transmission component 2 to rotate counterclockwise as a whole. When the steering paddle 11 rotates to disengage from the middle paddle branch 221, the transmission block 21 abuts against the stop block 31 and can no longer rotate. Fig.12 and Fig.14 However, the steering wheel 01 can continue to rotate counterclockwise, thereby driving the transmission component 2 to continue to rotate counterclockwise as a whole. When the steering paddle 11 continues to rotate about 360° until it abuts against the paddle branch 221 at the left end of the three-leaf paddle 22, the steering wheel 01 can no longer rotate counterclockwise. Fig.15 and Fig.16 As shown, this position is the hard stop position of the steering wheel 01 rotating counterclockwise.

[0061] Then, the steering wheel 01 can be rotated clockwise, that is, it can be rotated in the reverse direction from the hard stop position of counterclockwise rotation to start the rotation process, such as Fig.17 and Fig.18 As shown, the steering wheel 01 drives the transmission component 2 to rotate synchronously clockwise. When the transmission component 2 rotates approximately 360°, the steering paddle 11 abuts against the paddle branch 221 at the left end of the three-leaf paddle 22, as shown in FIG. Fig.21 and Fig. 22 As shown, the paddle branch 221 can rotate clockwise under the push of the steering paddle 11, thereby driving the transmission component 2 to rotate clockwise as a whole. When the steering paddle 11 rotates to disengage from the paddle branch 221 at the left end, the three-leaf paddle 22 returns to the initial position, as shown in FIG. Fig.23 and Fig.24 shown.

[0062] When the steering wheel 01 continues to rotate clockwise, the steering wheel 01 drives the transmission component 2 to rotate clockwise synchronously. After the steering paddle 11 idles for a period of time, it also first abuts against the paddle branch 221 located in the middle of the three-leaf paddle 22; then, the steering paddle 11 drives the transmission component 2 to rotate clockwise as a whole. When the steering paddle 11 rotates to disengage from the paddle branch 221 in the middle, the transmission block 21 abuts against the stop block 31 and can no longer rotate; but the steering wheel 01 can continue to rotate clockwise, thereby driving the transmission component 2 to continue to rotate clockwise as a whole. When the steering paddle 11 continues to rotate nearly 360° until it abuts against the paddle branch 221 at the right end of the three-leaf paddle 22, the steering wheel 01 can no longer rotate clockwise. This position is the hard stop point for the clockwise rotation of the steering wheel 01.

[0063] Subsequently, the steering wheel 01 can be rotated counterclockwise, that is, it rotates in the opposite direction from the hard stop position of clockwise rotation to start the rotation process. The steering wheel 01 drives the transmission component 2 to rotate counterclockwise synchronously. When the transmission component 2 rotates approximately 360°, the steering paddle 11 abuts against the paddle branch 221 at the right end of the three-leaf paddle 22. The paddle branch 221 can be rotated counterclockwise under the push of the steering paddle 11, thereby driving the transmission component 2 to rotate counterclockwise as a whole. When the steering paddle 11 rotates to disengage from the paddle branch 221 at the right end, the three-leaf paddle 22 rotates to the initial position again.

[0064] It can be seen that the present invention utilizes the transmission component 2 and the stop component 3 to control the end position of the rotation stroke of the steering component 1, and effectively constrains the rotation stroke of the steering component 1. When the rotation limiting device of the present invention is applied to the steering system, the steering component 1 is connected to the steering wheel 01, thereby realizing the control of the end position of the rotation stroke of the steering wheel 01, effectively constraining the rotation stroke of the steering wheel 01, and filling the gap in the field of hard stop points of wire-controlled steering. It can effectively ensure the precise control of the rotation stroke of the steering wheel 01 under normal working conditions, and effectively prevent the steering wheel 01 from idling due to misoperation when the vehicle is powered off. At the same time, compared with the rotation limiting device of the prior art, the present invention can effectively reduce the friction contact area and friction stroke during the stopping process, and reduce the rotational friction.

[0065] It can be seen from the above that in this embodiment, starting from the initial position, the counterclockwise rotation stroke and the clockwise rotation stroke of the steering component 1 are both about 540°, which is close to one and a half circles. In actual applications, the position of the steering paddle 11 at the initial position can also be adjusted as needed to adjust the travel range.

[0066] Please continue to refer to Figure 7 In this embodiment, the steering component 1 specifically includes a steering sleeve 12, a steering shaft 13 and a fixed structure 14. The fixed structure 14 is fixedly connected to the end wall of the steering sleeve 12 and the corresponding side wall of the mounting seat 4. In this way, there is a certain distance between the end wall of the steering sleeve 12 and the corresponding side wall of the mounting seat 4. The rotating shaft 13 is rotatably arranged inside the steering sleeve 12. The steering paddle 11 is arranged at one end of the peripheral wall of the rotating shaft 13 close to the mounting seat 4, and the steering paddle 11 is at least partially exposed from the steering sleeve 12, so that the steering paddle 11 is convenient for the cooperation with the three-leaf paddle 22.

[0067] In this way, the steering sleeve 12 plays a role in bearing the rotating shaft 13 , thereby ensuring the installation stability of the rotating shaft 13 and further improving the rotation accuracy of the steering paddle 11 .

[0068] There is no limit to the number of the fixing structures 14, as long as the connection stability between the steering sleeve 12 and the mounting seat 4 can be ensured. For example, the number of the fixing structures 14 can be one or more. When the number of the fixing structures 14 is multiple, the multiple fixing structures 14 can be distributed at intervals along the circumferential direction. Preferably, the number of the fixing structures 14 is three, and the three fixing structures 14 are evenly distributed along the circumferential direction, that is, the angle between two adjacent fixing structures 14 is 120°. The shape of the fixing structure 14 includes but is not limited to a cylindrical shape.

[0069] Among them, there is no restriction on the connection method between the fixing structure 14 and the steering sleeve 12 and the mounting seat 4. For example, the fixing structure 14 can be provided with external threads at both ends, or the fixing structure 14 directly adopts a screw structure, and the steering sleeve 12 and the mounting seat 4 are correspondingly provided with matching threaded holes, and the fixing structure 14 and the steering sleeve 12 and the mounting seat 4 are all threadedly connected; or the fixing structure 14 and the steering sleeve 12 and the mounting seat 4 are all welded and fixed; or the steering sleeve 12 and the mounting seat 4 are correspondingly provided with matching connecting holes, and the fixing structure 14 is inserted into the connecting hole and has an interference fit to achieve relative fixation of the steering sleeve 12 and the mounting seat 4; or the fixing structure 14 is integrally formed with one of the steering sleeve 12 and the mounting seat 4, and the other is provided with a matching connecting hole, and the fixing structure 14 is inserted into the connecting hole and has an interference fit.

[0070] Among them, the rotating shaft 13 can be rotatably inserted into the steering sleeve 12, and the rotating shaft 13 and the inner hole of the steering sleeve 12 can be clearance-fitted, or, it also includes a connecting bearing, the outer ring of the connecting bearing and the inner hole of the steering sleeve 12 are interference-fitted to be relatively fixed, and the inner ring of the connecting bearing and the outer peripheral wall of the rotating shaft 13 are interference-fitted to be relatively fixed. In this way, the rotating shaft 13 and the steering sleeve 12 are connected through the connecting bearing, which improves the rotation smoothness of the rotating shaft 13.

[0071] It can be understood that in actual applications, it is also feasible not to set the steering sleeve 12. In this case, one end of the rotating shaft 13 is directly connected to the mounting seat 4 and can rotate relatively, the other end of the rotating shaft 13 is connected to the power input component, and the steering paddle 11 is arranged on the peripheral wall of the rotating shaft 13 to cooperate with the three-leaf paddle 22. Of course, this embodiment plays a bearing role on the rotating shaft 13 by setting the steering sleeve 12, which can improve the structural stability of the steering component 1, and is a more preferred technical solution.

[0072] Please continue to refer to Figure 2 In this embodiment, the transmission component 2 also includes a transmission shaft 23, which can rotatably pass through the mounting seat 4, and the transmission block 21 and the three-leaf paddle 22 are both connected to the transmission shaft 23, and the transmission block 21 and the three-leaf paddle 22 are respectively arranged on both sides of the mounting seat 4. In this way, the overall structure can be made more compact in the longitudinal direction and the installation stability of the transmission component 2 can be improved.

[0073] The three-leaf paddle 22 and the transmission shaft 23 can be formed as one piece or separately and fixed by interference fit. The transmission block 21 and the transmission shaft 23 are fixed by interference fit so that the transmission block 21 and the three-leaf paddle 22 rotate synchronously.

[0074] Among them, the transmission shaft 23 can rotatably pass through the mounting seat 4, and the transmission shaft 23 and the mounting hole of the mounting seat 4 can be clearance-fitted; in order to improve the rotation stability of the transmission shaft 23, it can also include a connecting bearing, the outer ring of the connecting bearing is interference-fitted with the inner wall of the mounting hole for relative fixation, and the inner ring of the connecting bearing is interference-fitted with the outer peripheral wall of the transmission shaft 23 for relative fixation.

[0075] In practical applications, the transmission shaft 23 is mounted on the mounting seat 4, and the transmission block 21 and the three-leaf paddle 22 are both arranged on one side of the mounting seat 4. For example, one end of the transmission shaft 23 is rotatably connected to the mounting seat 4, the transmission block 21 is close to the mounting seat 4 to cooperate with the stopper 3, and the three-leaf paddle 22 is located on the side of the transmission block 21 away from the mounting seat 4 to cooperate with the three-leaf paddle 22. Of course, the technical solution of the transmission block 21 and the three-leaf paddle 22 being arranged on both sides of the mounting seat 4 in the present application makes the overall structure more compact in the longitudinal direction and improves the installation stability of the transmission component 2, which is a more preferred technical solution.

[0076] Furthermore, in the present embodiment, the paddle branch 221 is processed with a buffer material (not shown in the figure) at least on the surface of the contact position with the steering paddle 11, so as to avoid direct rigid contact between the steering paddle 11 and the paddle branch 221 and reduce the contact noise between the steering paddle 11 and the paddle branch 221.

[0077] There is no limitation on the specific material of the buffer material, and it may be rubber, for example.

[0078] Among them, the setting range of the buffer material is not limited. For example, the buffer material can be only set on the contact position surface between the paddle branches 221 and the paddle branches 221; or, it is also feasible to process the buffer material on the surface of the paddle branch 221, that is, the surface of the paddle branch 221 is coated with a layer of buffer material.

[0079] In addition, in the present embodiment, the buffer material is only provided on the paddle branch 221; in practical applications, the buffer material can also be provided on the steering paddle 11, and at least located on the surface of the contact position with the paddle branch 221; or, it is also feasible to provide the buffer material on the surface of the position where the steering paddle 11 and the paddle branch 221 are in contact with each other.

[0080] Please continue to refer to Figure 5In this embodiment, the stop component 3 includes two stop blocks 31, the two stop blocks 31 are symmetrically arranged and have a spacing, the transmission block 21 is located between the two stop blocks 31, and the rotation center of the transmission block 21 is located on the symmetry axis of the stop component 3.

[0081] It can be understood that when the transmission component 2 is in the initial position, the axis of the transmission block 21 coincides with the symmetry axis of the stop component 3. When the transmission block 21 rotates clockwise until it abuts against the corresponding stop block 31, the transmission block 21 cannot continue to rotate. At this time, the transmission component 2 is at the maximum displacement of the clockwise rotation; when the transmission block 21 rotates counterclockwise until it abuts against the corresponding stop block 31, the transmission block 21 cannot continue to rotate. At this time, the transmission component 2 is at the maximum displacement of the counterclockwise rotation. In this way, the two stop blocks 31 play a role in limiting the rotation range of the transmission component 2. The rotation center of the transmission block 21 is located on the symmetry axis of the stop component 3, which can ensure that the counterclockwise rotation stroke of the transmission block 21 is consistent with the clockwise rotation stroke.

[0082] Of course, in practical applications, the stop component 3 is not limited to the above-mentioned structural form. For example, the stop component 3 can be an integrated arc-shaped structure, and abutment walls are formed at both ends of the inner wall of the arc-shaped structure. The two abutment walls serve to limit the rotation range of the transmission component 2.

[0083] It can be understood that in the aforementioned rotation limiting device, when the three-leaf paddle 22 is not engaged with the steering paddle 11, the transmission component 2 is in a relatively rotatable state. When encountering an unknown force, the transmission component 2 may shake and generate noise. Based on this, Figure 5 As shown, the rotation limiting device of the present invention also includes a resisting component 5, which includes an elastic member 51 and a ball 52. The elastic member 51 extends along the symmetry axis of the stop member 3, one end of the elastic member 51 is fixed to the mounting seat 4, and the ball 52 is connected to the other end of the elastic member 51. The elastic member 51 is in an energy storage state to press the ball 52 against the peripheral wall of the transmission block 21.

[0084] As described above, the transmission component 2 is always subjected to the force from the abutting component 5 to maintain a static balance state. For example, when the transmission component 2 is in the initial position, the ball 52 abuts against the end peripheral wall of the transmission block 21. At this time, the elastic member 51 is in the maximum compression state, and the elastic force is also the largest. Fig.10As shown; when the steering paddle 11 rotates to contact the paddle branch 221 in the middle, the steering component 1 can drive the transmission component 2 to rotate synchronously. At this time, the transmission block 21 also rotates clockwise or counterclockwise, and the elastic member 51 gradually recovers along the axial direction. The ball 52 moves along the peripheral wall of the transmission block 21 under the action of the restoring force of the elastic member 51. When the steering paddle 11 rotates to disengage from the paddle branch 221 in the middle, the transmission block 21 abuts against the stop member 3, and the abutting member 5 presses the transmission block 21 against the stop member 3, so that the transmission component 2 can be maintained at the current position, as shown in FIG. Fig.14 As shown; when the steering paddle 11 rotates in the opposite direction to contact the paddle branch 221 at the corresponding end, the steering paddle 11 pushes the transmission component 2 to rotate, and the elastic member 51 is gradually compressed by the thrust of the transmission block 21. The ball 52 moves in the opposite direction along the peripheral wall of the transmission block 21 under the elastic force of the elastic member 51, until the steering paddle 11 rotates in the opposite direction to disengage from the paddle branch 221 at the corresponding end, the transmission component 2 returns to the initial position, the elastic member 51 also returns to the maximum compression state, and the ball 52 abuts against the peripheral wall of the end of the transmission block 21 again, as shown in FIG. Fig.24 shown.

[0085] It can be seen that the present invention adds the abutting component 5 so that the transmission component 2 is always subjected to the force from the abutting component 5 to maintain a static balance state no matter where it is rotated to, thereby preventing the transmission component 2 from shaking and avoiding the generation of noise.

[0086] Furthermore, in the present application, the transmission block 21 is a teardrop-shaped structure, and its free end is a sharp end. If the free end of the transmission block 21 is not processed, the contact area between the transmission block 21 and the ball 52 is very small, and the contact state cannot be guaranteed. Figure 4 As shown, a groove 21a is provided at the free end of the transmission block 21. When the transmission block 21 is located at the initial position, the ball 52 is pressed into the groove 21a, thereby increasing the contact area between the ball 52 and the transmission block 21 and improving the contact stability between the ball 52 and the transmission block 21. At the same time, the ball 52 can also be forced to break away from the groove 21a to prevent resistance to the rotation of the transmission block 21.

[0087] In addition, if Figure 1-Figure 2 As shown, the abutting component 5 further includes a limiting slide rail 53 fixed to the mounting seat 4. A guide groove extending along the symmetry axis of the stopping component 3 is formed inside the limiting slide rail 53. The elastic member 51 and the ball bearing 52 are installed in the guide groove.

[0088] In this way, the limiting slide rail 53 can play a guiding role, so that the elastic member 51 can only be stretched or compressed along the extending direction of the guide groove, thereby preventing the movement of the elastic member 51 and the ball 52 from deviating from the axis.

[0089] Among them, Figure 6As shown, the limiting slide rail 53 specifically includes a first limiting portion 531 and a second limiting portion 532 which are arranged opposite to each other and connected as a whole. The first limiting portion 531 is fixed to the mounting seat 4. There is a distance between the first limiting portion 531 and the second limiting portion 532. The first limiting portion 531 and the second limiting portion 532 are arranged opposite to each other with arc-shaped grooves 53a. An installation space is formed between the arc-shaped grooves 53a, and the elastic member 51 is installed in the installation space.

[0090] It can be understood that in actual applications, it is also feasible not to provide the first limiting portion 531 . In this case, the arc-shaped groove 53 a can be directly processed on the mounting seat 4 .

[0091] At the same time, the distance between the first limit portion 531 and the second limit portion 532 should ensure that the transmission block 21 can rotate between the first limit portion 531 and the second limit portion 532, that is, the distance between the first limit portion 531 and the second limit portion 532 is not less than the thickness of the transmission block 21.

[0092] like Figure 2 As shown, the resisting component 5 also includes a base 54, which is fixed to the mounting seat 4. The first limiting portion 531 and the second limiting portion 532 are both fixedly connected to the base 54 to achieve relative fixation of the two. The base 54 is located at the end away from the transmission block 21 to prevent the base 54 from interfering with the rotation of the transmission block 21. The end of the elastic member 51 away from the ball 52 is also fixed to the base 54 to achieve relative fixation of the elastic member 51 and the mounting seat 4.

[0093] The base 54 and the mounting seat 4 may be fixed by welding, and at least one of the first limiting portion 531 and the second limiting portion 532 may be integrally formed with the base 54 .

[0094] The present invention further provides a steering system, comprising a steering wheel 01 and the aforementioned rotation limiting device, wherein the steering wheel 01 is connected to the steering component 1 .

[0095] The steering system of the present invention includes the aforementioned rotation limiting device, and thus has the same technical effects as the aforementioned rotation limiting device, which will not be described in detail herein.

[0096] The steering wheel 01 specifically includes a steering wheel rim 011, a steering wheel hub 012 and a steering wheel rotation input shaft 013 which are connected together. The steering wheel rotation input shaft 013 is fixedly connected to the steering shaft 13. There is no restriction on the connection method, such as welding or threaded connection.

[0097] The present invention also provides a rotation limiting method, which is applicable to the above-mentioned rotation limiting device and comprises the following steps:

[0098] The steering component 1 rotates along the rotation direction, and when the steering paddle 11 rotates to contact the middle paddle branch 221, the steering component 1 drives the transmission component 2 to rotate synchronously. When the steering paddle 11 rotates to disengage from the middle paddle branch 221, the transmission block 21 abuts against the stop component 3, and the steering paddle 11 continues to rotate in the same direction until it contacts the paddle branch 221 at the corresponding end. The transmission component 2 limits the rotation of the steering component 1. When the steering paddle 11 rotates in the opposite direction to contact the paddle branch 221 at the corresponding end, the steering paddle 11 pushes the transmission component 2 to rotate. When the steering paddle 11 rotates in the opposite direction to disengage from the paddle branch 221 at the corresponding end, the transmission component 2 returns to the initial position.

[0099] The rotation limiting method of the present invention is applicable to the aforementioned rotation limiting device, and therefore has the same technical effect as the aforementioned rotation limiting device, which will not be described in detail herein.

[0100] The above is a detailed introduction to a rotation limiting device, a steering system and a rotation limiting method provided by the present invention. The principle and implementation method of the present invention are described in detail using specific examples. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. It should be pointed out that for ordinary technicians in this technical field, the present invention can also be improved and modified without departing from the principle of the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A rotation limiting device, characterized in that: The invention comprises a steering component (1), a transmission component (2), a stop component (3) and a mounting seat (4); the steering component (1) and the transmission component (2) are both relatively rotatably mounted on the mounting seat (4); the transmission component (2) comprises a transmission block (21) and a three-leaf paddle (22) connected in one body; the stop component (3) is fixed to the mounting seat (4); the stop component (3) is used to limit the rotation range of the transmission block (21); the three-leaf paddle (22) has three paddle branches (221); the steering component (1) has a steering paddle (11); and the outlines of the steering paddle (11) and the three-leaf paddle (22) are designed as follows: The steering paddle (11) can be rotated to contact or disengage with any of the paddle branches (221), and when the steering paddle (11) is rotated to contact with the paddle branch (221) in the middle, the steering component (1) can drive the transmission component (2) to rotate synchronously; when the steering paddle (11) is rotated to disengage with the paddle branch (221) in the middle, the transmission block (21) abuts against the stop component (3); when the steering paddle (11) continues to rotate in the same direction to contact with the paddle branch (221) at the corresponding end, the transmission component (2) limits the rotation of the steering component (1); when the steering paddle (11) is rotated in the opposite direction to contact with the paddle branch (221) at the corresponding end, the steering paddle (11) can push the transmission component (2) to rotate; when the steering paddle (11) is rotated in the opposite direction to disengage with the paddle branch (221) at the corresponding end, the transmission component (2) returns to the initial position.

2. The rotation limiting device according to claim 1, characterized in that: The steering component (1) further comprises a steering sleeve (12), a steering shaft (13) and a fixing structure (14); the fixing structure (14) is fixedly connected to an end wall of the steering sleeve (12) and a corresponding side wall of the mounting seat (4); the rotating shaft (13) is partially rotatably arranged inside the steering sleeve (12); the steering paddle (11) is arranged on an end of a peripheral wall of the rotating shaft (13) close to the mounting seat (4); and the steering paddle (11) is at least partially exposed outside the steering sleeve (12).

3. The rotation limiting device according to claim 1, characterized in that: The transmission component (2) further comprises a transmission shaft (23), the transmission shaft (23) rotatably passing through the mounting seat (4), the transmission block (21) and the three-leaf paddle (22) are both connected to the transmission shaft (23), and the transmission block (21) and the three-leaf paddle (22) are respectively arranged on two sides of the mounting seat (4).

4. The rotation limiting device according to claim 1, characterized in that: The steering paddle (11) and / or the paddle branch (221) are processed with buffer material on the surface at least at the position where they contact each other.

5. The rotation limiting device according to claim 1, characterized in that: The stop component (3) comprises two stop blocks (31), the two stop blocks (31) are symmetrically arranged and have a spacing, the transmission block (21) is located between the two stop blocks (31), and the rotation center of the transmission block (21) is located on the symmetry axis of the stop component (3).

6. The rotation limiting device according to claim 5, characterized in that: The invention also comprises a resisting component (5), wherein the resisting component (5) comprises an elastic component (51) and a ball (52), wherein the elastic component (51) extends along the symmetry axis of the stop component (3), one end of the elastic component (51) is fixed to the mounting seat (4), and the ball (52) is connected to the other end of the elastic component (51), and the elastic component (51) is in an energy storage state so as to press the ball (52) against the peripheral wall of the transmission block (21).

7. The rotation limiting device according to claim 6, characterized in that: The free end of the transmission block (21) is provided with a groove (21a); ​​when the transmission block (21) is located at an initial position, the ball (6) is pressed into the groove (21a); ​​and the ball (52) can also be forced to separate from the groove (21a).

8. The rotation limiting device according to claim 6, characterized in that: The abutting component (5) further comprises a limiting slide rail (53) fixed to the mounting seat (4), wherein a guide groove extending along the symmetry axis direction of the stop component (3) is formed inside the limiting slide rail (53), and the elastic component (51) and the ball (52) are mounted in the guide groove.

9. A steering system, comprising a steering wheel (01), characterized in that: It also comprises the rotation limiting device according to any one of claims 1 to 8, wherein the steering wheel (01) is connected to the steering component (1) in the rotation limiting device.

10. A rotation limiting method, applicable to the rotation limiting device according to any one of claims 1 to 8, characterized in that: The steps include: The steering component (1) rotates in the rotation direction, and when the steering paddle (11) rotates to contact with the paddle branch (221) in the middle, the steering component (1) drives the transmission component (2) to rotate synchronously; when the steering paddle (11) rotates to disengage from the paddle branch (221) in the middle, the transmission block (21) abuts against the stop component (3); when the steering paddle (11) continues to rotate in the same direction to contact with the paddle branch (221) at the corresponding end, the transmission component (2) limits the rotation of the steering component (1); when the steering paddle (11) rotates in the opposite direction to contact with the paddle branch (221) at the corresponding end, the steering paddle (11) pushes the transmission component (2) to rotate; when the steering paddle (11) rotates in the opposite direction to disengage from the paddle branch (221) at the corresponding end, the transmission component (2) returns to the initial position.

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