Steering angle limiting mechanism, steering system, and vehicle

Abstract

A steering angle limiting mechanism, comprising: a housing (11), an output shaft (12), and a limiting assembly (13). A mounting cavity (111) is provided in the housing; a fixing portion (112) is provided in the mounting cavity (111); the output shaft (12) passes through the mounting cavity (111); the output shaft has a left limit position and a right limit position; the limiting assembly (13) is provided in the mounting cavity (111); the limiting assembly (13) comprises a driven member (131) and a rotating component (132); the driven member (131) is fixedly connected to the output shaft (12); a linkage portion (1311) is provided on the driven member (131); the rotating component (132) is rotatably mounted on the output shaft (12); when located between the left limit position and the right limit position, the linkage portion (1311) can drive the rotating component (132) to rotate relative to the mounting cavity (111), and when located in any one of the left limit position and the right limit position, the linkage portion (1311) abuts against the rotating component (132) along the circumferential direction of the output shaft (12), and the rotating component (132) abuts against the fixing portion (112) along the circumferential direction of the output shaft (12) so as to limit the rotation of the output shaft (12) relative to the mounting cavity (111). Also provided are a steering system and a vehicle.

Description

Corner limit mechanism, steering system and vehicle

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application is based on the Chinese patent application with application number 202420425360.5 and application date of March 5, 2024, and claims the priority of the above-mentioned Chinese patent application. The entire content of the above-mentioned Chinese patent application is hereby introduced into this application as a reference. Technical Field

[0003] The present application relates to the field of vehicle technology, and in particular, to a corner limiting mechanism, a steering system and a vehicle. Background Art

[0004] In a vehicle's steering system, manufacturers usually add an angle limiter to restrict the steering wheel's rotation angle range. The limiter prevents the driver from turning the steering wheel clockwise or counterclockwise to a certain angle, thereby protecting the vehicle's steering system and ensuring driving safety.

[0005] In the related art, the angle limiting mechanism adopts a nut-screw form and a planetary gear assembly form, etc. However, the above-mentioned design schemes have a complex structure and occupy a large space of the steering system. Summary of the Invention

[0006] The present application aims to solve one of the technical problems in the related art at least to a certain extent.

[0007] To this end, an embodiment of the present application provides a corner limiting mechanism, which has a simple and compact structure and occupies a small space.

[0008] An embodiment of the present application also provides a steering system.

[0009] An embodiment of the present application also provides a vehicle.

[0010] The rotation angle limit mechanism of the embodiment of the present application includes: a shell, a mounting cavity is provided in the shell, and a fixing portion is provided in the mounting cavity; an output shaft, the output shaft is passed through the mounting cavity, and the output shaft has a left limit position and a right limit position; a limiting assembly, the limiting assembly is provided in the mounting cavity, and the limiting assembly includes a follower and a rotating component, the follower is fixedly connected to the output shaft, the follower is provided with a linkage portion, and the rotating component is rotatably mounted on the output shaft, when between the left limit position and the right limit position, the linkage portion can drive the rotating component to rotate relative to the mounting cavity, and when in either the left limit position or the right limit position, the linkage portion stops the rotating component along the circumference of the output shaft, and the rotating component stops the fixing portion along the circumference of the output shaft to limit the output shaft from rotating relative to the mounting cavity.

[0011] According to the angle limiting mechanism of the embodiment of the present application, when the output shaft moves between the left limit position and the right limit position, the linkage portion can drive the rotating component to rotate relative to the installation cavity. At this time, the output shaft and the driven member can rotate relative to the rotating component, and the rotating component can also rotate relative to the fixed member. When the output shaft is at either the left limit position or the right limit position, the linkage portion abuts the rotating component along the circumference of the output shaft, and the rotating component abuts the fixed portion along the circumference of the output shaft to limit the rotation of the output shaft relative to the installation cavity, so as to limit the rotation angle of the steering wheel, thereby realizing the step-by-step transmission of the angle limiting mechanism. Therefore, the transmission structure of the angle limiting mechanism of the embodiment of the present application is simple, and the rotating component adopts the form of circumferential abutment for limitation, which can reduce the axial size of the angle limiting mechanism, so that the structure of the angle limiting mechanism is compact and occupies less space.

[0012] In some embodiments, the rotating component includes a first rotating sleeve, a first inner limit portion is provided on the inner side of the first rotating sleeve, a first outer limit portion is provided on the outer side of the first rotating sleeve, and the first rotating sleeve is sleeved on the driven member. Between the left limit position and the right limit position, the linkage portion is rotatable relative to the first inner limit portion along the circumference of the output shaft, and the first outer limit portion is rotatable relative to the fixed portion along the circumference of the output shaft. At either the left limit position or the right limit position, the linkage portion stops against the first inner limit portion along the circumference of the output shaft, and the first outer limit portion stops against the fixed portion along the circumference of the output shaft.

[0013] In some embodiments, the follower includes a shifting portion, a mounting portion and the linkage portion, one end of the mounting portion is fixedly connected to the shifting portion, the other end of the mounting portion is fixedly connected to the output shaft, the first rotating sleeve is arranged on the mounting portion and is located between the output shaft and the shifting portion, and the linkage portion is arranged on a side of the shifting portion adjacent to the mounting portion.

[0014] In some embodiments, the rotating component also includes a second rotating sleeve, which is installed on the side of the first rotating sleeve away from the driven member and is rotatably connected to the output shaft. The outer side of the second rotating sleeve has a second limiting portion. When between the left limit position and the right limit position, the second limiting portion is rotatable along the circumference of the output shaft relative to at least one of the first outer limiting portion and the fixed portion. At either the left limit position or the right limit position, the first outer limiting portion stops against the second limiting portion along the circumference of the output shaft, and the second limiting portion stops against the fixed portion along the circumference of the output shaft.

[0015] In some embodiments, the rotating component also includes a third rotating sleeve, which is installed on the side of the second rotating sleeve away from the first rotating sleeve and is rotatably connected to the output shaft. The outer side of the third rotating sleeve has a third limiting portion. When between the left limit position and the right limit position, the third limiting portion is rotatable along the circumference of the output shaft relative to the second limiting portion and at least one of the fixed portion. At either the left limit position or the right limit position, the second limiting portion stops against the third limiting portion along the circumference of the output shaft, and the third limiting portion stops against the fixed portion along the circumference of the output shaft.

[0016] In some embodiments, the second limiting portion includes a first stop portion and a second stop portion, the first stop portion extends outward along the radial direction of the second rotating sleeve, and the second stop portion is arranged on a side of the second stop portion adjacent to the first rotating sleeve, the first stop portion can be offset against the third limiting portion along the circumference of the output shaft, and the second stop portion can be offset against the first outer limiting portion along the circumference of the output shaft.

[0017] In some embodiments, the third limiting portion includes a third stop portion and a fourth stop portion, and the third stop portion and the fourth stop portion are arranged on the third rotating sleeve along the axial direction of the output shaft. The third stop portion is provided on a side of the third rotating sleeve adjacent to the second rotating sleeve, and the fourth stop portion is provided on a side of the third rotating sleeve away from the second rotating sleeve. The third stop portion can be against the second limiting portion along the circumference of the output shaft, and the fourth stop portion can be against the fixed portion along the circumference of the output shaft.

[0018] In some embodiments, the interference between the first rotating sleeve and the driven member, and the interference between the inner holes of the second rotating sleeve and the inner holes of the third rotating sleeve and the output shaft are H, 0.05mm≤H≤0.34mm.

[0019] The steering system of another embodiment of the present application includes: an angle limiting mechanism, which is the angle limiting mechanism described in any one of the embodiments of the present application; a reduction mechanism, wherein the output shaft is fixedly connected to the reduction mechanism, and the reduction mechanism has an input shaft; a steering mechanism, wherein the steering mechanism includes a steering wheel and a steering shaft, one end of the steering shaft is fixedly connected to the steering wheel, and the other end of the steering shaft is fixedly connected to the input shaft.

[0020] According to the steering system of the embodiment of the present application, since the linkage portion can drive the rotating component to rotate relative to the mounting cavity when the output shaft moves between the left limit position and the right limit position, the output shaft and the driven member can rotate relative to the rotating component, and the rotating component can also rotate relative to the fixed member. When the output shaft is at either the left limit position or the right limit position, the linkage portion abuts the rotating component along the circumference of the output shaft, and the rotating component abuts the fixed portion along the circumference of the output shaft to limit the rotation of the output shaft relative to the mounting cavity, so as to limit the rotation angle of the steering wheel, thereby realizing the step-by-step transmission of the angle limiting mechanism. Therefore, the transmission structure of the angle limiting mechanism of the steering system of the embodiment of the present application is simple, and the rotating component adopts the form of circumferential abutment for limitation, which can reduce the axial size of the angle limiting mechanism, so that the structure of the angle limiting mechanism is compact and occupies less space.

[0021] A vehicle according to another embodiment of the present application includes the steering system described in the embodiment of the present application.

[0022] According to the vehicle of the embodiment of the present application, since the linkage portion can drive the rotating component to rotate relative to the mounting cavity when the output shaft moves between the left limit position and the right limit position, the output shaft and the driven member can rotate relative to the rotating component, and the rotating component can also rotate relative to the fixed member. When the output shaft is at either the left limit position or the right limit position, the linkage portion abuts the rotating component along the circumference of the output shaft, and the rotating component abuts the fixed portion along the circumference of the output shaft to limit the rotation of the output shaft relative to the mounting cavity, so as to limit the rotation angle of the steering wheel, thereby realizing the step-by-step transmission of the angle limiting mechanism. Therefore, the transmission structure of the angle limiting mechanism of the vehicle of the embodiment of the present application is simple, and the rotating component adopts the form of circumferential abutment for limitation, which can reduce the axial size of the angle limiting mechanism, so that the structure of the angle limiting mechanism is compact and occupies less space. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] FIG1 is a schematic diagram of a steering system according to an embodiment of the present application.

[0024] FIG2 is an exploded view of the corner limiting mechanism according to an embodiment of the present application.

[0025] FIG3 is a cross-sectional view of the corner limiting mechanism according to an embodiment of the present application along the AA section line in FIG1 .

[0026] FIG4 is a schematic diagram of the output shaft of the rotation angle limiting mechanism according to an embodiment of the present application.

[0027] FIG5 is a front view of the follower of the rotation angle limiting mechanism according to the embodiment of the present application.

[0028] FIG6 is a cross-sectional view taken along line BB in FIG5.

[0029] FIG7 is a front view of the installation of the driven member and the first rotating sleeve of the angle limiting mechanism according to the embodiment of the present application.

[0030] FIG8 is a cross-sectional view taken along line CC in FIG7 .

[0031] FIG9 is a front view of the installation of the first rotating sleeve and the second rotating sleeve of the angle limiting mechanism of the embodiment of the present application.

[0032] FIG10 is a cross-sectional view taken along line DD in FIG9 .

[0033] FIG11 is a front view of the installation of the first rotating sleeve, the second rotating sleeve and the third rotating sleeve of the angle limiting mechanism of the embodiment of the present application.

[0034] FIG12 is a cross-sectional view taken along line EE in FIG11 .

[0035] FIG13 is a front view of the installation of the angle limiting mechanism (after removing the output shaft and the driven member) according to an embodiment of the present application.

[0036] FIG14 is a cross-sectional view taken along line FF in FIG13 .

[0037] Reference numerals: 1. Angle limiting mechanism; 11. Housing; 111. Mounting cavity; 112. Fixing portion; 113. Mounting hole; 12. Output shaft; 121. Mounting groove; 13. Limiting assembly; 131. Follower; 1311. Linking portion; 1312. Shifting portion; 1313. Mounting portion; 132. Rotating parts; 1321, first rotating sleeve; 13211, first inner limiting part; 13212, first outer limiting part; 13213, first rotating body; 1322, second rotating sleeve; 13221, second limiting part; 13222, first stop part; 13223, second stop part; 13224, second rotating body; 1323, third rotating sleeve; 13231, third limiting part; 13232, third stop part; 13233, fourth stop part; 13234, third rotating body; 2, speed reduction mechanism; 21, speed reduction housing; 3, steering mechanism; 31, steering shaft. DETAILED DESCRIPTION

[0038] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present application, but should not be understood as limiting the present application.

[0039] The following describes the corner limiting mechanism 1 , the steering system, and the vehicle according to an embodiment of the present application with reference to FIG1 to FIG14 .

[0040] The rotation angle limiting mechanism 1 of the present embodiment includes: a housing 11, an output shaft 12, and a limiting assembly 13. The housing 11 has a mounting cavity 111, a fixing portion 112 disposed therein, and the output shaft 12 extends through the mounting cavity 111. The output shaft 12 has a left limit position and a right limit position. The limiting assembly 13 is disposed within the mounting cavity 111 and includes a driven member 131 and a rotating member 132. The driven member 131 is fixedly connected to the output shaft 12, a linkage portion 1311 disposed thereon, and the rotating member 132 is rotatably mounted on the output shaft 12.

[0041] When between the left limit position and the right limit position, the linkage part 1311 can drive the rotating component 132 to rotate relative to the mounting cavity 111. When at either the left limit position or the right limit position, the linkage part 1311 stops the rotating component 132 along the circumference of the output shaft 12, and the rotating component 132 stops the fixed part 112 along the circumference of the output shaft 12 to limit the rotation of the output shaft 12 relative to the mounting cavity 111.

[0042] It can be understood that the left limit position may correspond to the limit position of the steering wheel (not shown) rotating counterclockwise, and the right limit position may correspond to the limit position of the steering wheel rotating clockwise, thereby limiting the rotation angle of the steering wheel.

[0043] According to the angle limiting mechanism 1 of the embodiment of the present application, when the output shaft 12 moves between the left and right limit positions, the linkage portion 1311 can drive the rotating component 132 to rotate relative to the mounting cavity 111. At this time, the output shaft 12 and the driven member 131 can rotate relative to the rotating component 132, and the rotating component 132 can also rotate relative to the fixed member. When the output shaft 12 is in either the left or right limit position, the linkage portion 1311 circumferentially abuts the rotating component 132, and the rotating component 132 circumferentially abuts the fixed portion 112, thereby limiting the rotation of the output shaft 12 relative to the mounting cavity 111 and limiting the rotation angle of the steering wheel, thereby achieving step-by-step transmission of the angle limiting mechanism 1. Therefore, the transmission structure of the angle limiting mechanism 1 of the embodiment of the present application is simple, and the rotation component 132 uses a circumferential abutment method to limit the position, which can reduce the axial size of the angle limiting mechanism 1, making the angle limiting mechanism 1 compact and space-saving.

[0044] It will be appreciated that, as shown in Figures 2, 3, and 14, the housing 11 is provided with a mounting hole 113, which communicates with the mounting cavity 111. One end of the output shaft 12 is inserted into the mounting cavity 111 through the mounting hole 113. The other end of the output shaft 12 is fixedly connected to the reduction mechanism 2. Specifically, the reduction mechanism 2 includes a reduction housing 21, and the housing 11 is fixedly connected to the reduction housing 21. For example, the housing 11 and the reduction housing 21 can be connected by bolts. As a result, when the output shaft 12 drives the rotating component 132 to rotate, the housing 11 can remain stationary.

[0045] In some embodiments, the rotating component 132 may include one or more rotating sleeves.

[0046] Specifically, as shown in Figures 7 to 9, the rotating component 132 includes a first rotating sleeve 1321, the inner side of the first rotating sleeve 1321 is provided with a first inner limit portion 13211, and the outer side of the first rotating sleeve 1321 is provided with a first outer limit portion 13212. The first rotating sleeve 1321 is sleeved on the follower 131. Between the left limit position and the right limit position, the linkage portion 1311 is rotatable relative to the first inner limit portion 13211 along the circumference of the output shaft 12, and the first outer limit portion 13212 is rotatable relative to the fixed portion 112 along the circumference of the output shaft 12. In either the left limit position or the right limit position, the linkage portion 1311 stops against the first inner limit portion 13211 along the circumference of the output shaft 12, and the first outer limit portion 13212 stops against the fixed portion 112 along the circumference of the output shaft 12.

[0047] It can be understood that when between the left limit position and the right limit position, the linkage part 1311 is spaced apart from the first inner limit part 13211 along the circumference of the output shaft 12, so that the linkage part 1311 can rotate within a certain angle range, and the first inner limit part 13211 will not interfere with the rotation of the linkage part 1311; similarly, the first outer limit part 13212 is spaced apart from the fixed part 112 along the circumference of the output shaft 12, so that the first outer limit part 13212 can rotate within a certain angle range.

[0048] When the linkage portion 1311 moves to either the left limit position or the right limit position, the linkage portion 1311 abuts against one surface of the first inner limit portion 13211 along the circumference of the output shaft 12, and the first outer limit portion 13212 abuts against the fixed portion 112 along the circumference of the output shaft 12. At this time, any one of the output shaft 12, the follower 131, and the rotating component 132 is relatively fixed to the housing 11, thereby limiting the rotation angle of the output shaft 12. The angle limiting mechanism 1 of the embodiment of the present application, by configuring the first rotating sleeve 1321 to have the above-mentioned structure, is conducive to further reducing the axial dimension of the angle limiting mechanism 1 and reducing the space occupied by the angle limiting mechanism 1. In addition, the structural design is simple and the cost is low.

[0049] It should be noted that the first outer limiting portion 13212 indirectly or directly abuts the fixed portion 112 along the circumference of the output shaft 12. For example, when the rotating component 132 has only one rotating sleeve (the first rotating sleeve 1321), the first outer limiting portion 13212 directly abuts the fixed portion 112 along the circumference of the output shaft 12, thereby limiting the angular position of the rotating component 132 and the output shaft 12. When the rotating component 132 includes multiple rotating sleeves, the first rotating sleeve 1321 may indirectly abut the fixed portion 112 via another rotating sleeve (the second rotating sleeve 1322 or the third rotating sleeve 1323).

[0050] Furthermore, as shown in Figures 5 to 8, the driven member 131 includes a shifting portion 1312, a mounting portion 1313, and a linkage portion 1311. One end of the mounting portion 1313 is fixedly connected to the shifting portion 1312, and the other end of the mounting portion 1313 is fixedly connected to the output shaft 12. A first rotating sleeve 1321 is sleeved on the mounting portion 1313 and located between the output shaft 12 and the shifting portion 1312. The linkage portion 1311 is located on a side of the shifting portion 1312 adjacent to the mounting portion 1313. The mounting portion 1313 and the output shaft 12 can be rotationally fixedly connected by an interference fit, that is, the mounting portion 1313 and the output shaft 12 cannot rotate relative to each other after installation. For example, the end of the output shaft 12 is provided with a mounting groove 121, and the mounting portion 1313 is interference-fitted into the mounting groove 121. This facilitates assembly of the position-limiting assembly 13, and has a simple structural design and is easy to manufacture.

[0051] The first rotating sleeve 1321 is sleeved on the mounting portion 1313 and is located between the output shaft 12 and the shifting portion 1312. The linkage portion 1311 is located on a side of the shifting portion 1312 adjacent to the mounting portion 1313. It is understood that the outer diameter of the shifting portion 1312 is larger than the inner diameter of the first rotating sleeve 1321, thereby preventing the first rotating sleeve 1321 from slipping out of the shifting portion 1312 in a direction away from the output shaft 12.

[0052] For example, the first rotating sleeve 1321 includes a first rotating body 13213, a first inner limiting portion 13211 and a first outer limiting portion 13212. The first inner limiting portion 13211 and the first outer limiting portion 13212 are respectively arranged on the inner and outer sides of the first rotating body 13213 along the radial direction of the first rotating body 13213.

[0053] The inner diameter R1 of the circle surrounding the first inner limiting portion 13211 can be larger than the outer diameter r1 of the mounting portion 1313 to ensure that the first rotating body 13213 does not interfere with the follower 131 during rotation. At the same time, the outer diameter r2 of the blocking portion 1312 is smaller than the inner diameter R2 of the first rotating body 13213 and larger than the inner diameter R1 of the circle surrounding the first inner limiting portion 13211 to ensure that the linkage portion 1311 can contact the first inner limiting portion 13211 of the first rotating sleeve 1321 after the follower 131 rotates a certain angle.

[0054] It can be understood that, as shown in Figure 7, the linkage part 1311 has a limit surface g1 and a limit surface g2 arranged relatively along the circumference of the output shaft 12, and the first inner limit part 13211 has a limit surface G1 and a limit surface G2 arranged relatively along the circumference of the output shaft 12. When the follower 131 rotates clockwise, the limit surface g1 contacts the limit surface G1 (when rotating counterclockwise, the limit surface g2 contacts the limit surface G2), thereby driving the first rotating sleeve 1321 to move clockwise (counterclockwise).

[0055] In some embodiments, as shown in Figures 2, 9 and 10, the rotating component 132 also includes a second rotating sleeve 1322, which is installed on the side of the first rotating sleeve 1321 away from the follower 131 and is rotatably connected to the output shaft 12. The outer side of the second rotating sleeve 1322 has a second limiting portion 13221. When between the left limit position and the right limit position, the second limiting portion 13221 is rotatable along the circumference of the output shaft 12 relative to at least one of the first outer limiting portion 13212 and the fixed portion 112. When in either the left limit position or the right limit position, the first outer limiting portion 13212 stops against the second limiting portion 13221 along the circumference of the output shaft 12, and the second limiting portion 13221 stops against the fixed portion 112 along the circumference of the output shaft 12. It can be understood that the second limiting portion 13221 can stop the first outer limiting portion 13212 and the fixing portion 112, thereby further reducing the structural size of the rotating component 132 without affecting the transmission effect of the rotating component 132.

[0056] It should be noted that the second position-limiting portion 13221 directly or indirectly abuts the fixed portion 112 along the circumferential direction of the output shaft 12. For example, when the rotating component 132 comprises only two rotating sleeves (a first rotating sleeve 1321 and a second rotating sleeve 1322), the second position-limiting portion 13221 directly abuts the fixed portion 112 along the circumferential direction of the output shaft 12, thereby limiting the angular position of the rotating component 132 and the output shaft 12. When the rotating component 132 comprises multiple rotating sleeves, the second rotating sleeve 1322 may indirectly abut the fixed portion 112 via another rotating sleeve (a third rotating sleeve 1323).

[0057] In another example, as shown in Figures 2, 11 and 12, the rotating component 132 also includes a third rotating sleeve 1323, which is installed on the side of the second rotating sleeve 1322 away from the first rotating sleeve 1321 and is rotatably connected to the output shaft 12. The outer side of the third rotating sleeve 1323 has a third limiting portion 13231. When between the left limit position and the right limit position, the third limiting portion 13231 is rotatable along the circumference of the output shaft 12 relative to at least one of the second limiting portion 13221 and the fixed portion 112. When in either the left limit position or the right limit position, the second limiting portion 13221 stops against the third limiting portion 13231 along the circumference of the output shaft 12, and the third limiting portion 13231 stops against the fixed portion 112 along the circumference of the output shaft 12.

[0058] When the output shaft 12 is between the left limit position and the right limit position, the linkage part 1311 of the follower 131 and the first inner limit part 13211 of the first rotating sleeve 1321 can be spaced apart along the circumference of the output shaft 12, and at least one of the first outer limit part 13212 and the third limit part 13231 is spaced apart from the second limit part 13221 of the second rotating sleeve 1322 along the circumference of the output shaft 12, and the third limit part 13231 is spaced apart from the fixed part 112 along the circumference of the output shaft 12. At this time, the output shaft 12 can rotate relative to the housing 11.

[0059] When the output shaft 12 is in either the left limit position or the right limit position, the linkage part 1311 of the follower 131 and the first inner limit part 13211 of the first rotating sleeve 1321 are offset against each other along the output shaft 12, and either the first outer limit part 13212 or the third limit part 13231 is offset against the second limit part 13221 of the second rotating sleeve 1322 along the circumference of the output shaft 12, and the third limit part 13231 is offset against the fixed part 112 along the circumference of the output shaft 12, thereby limiting the angle of the output shaft 12 to prevent the output shaft 12 from continuing to rotate clockwise or counterclockwise.

[0060] Of course, the rotating component 132 may also have more than three rotating sleeves for step-by-step transmission, and its transmission method is the same as the transmission principle of the first rotating sleeve 1321, the second rotating sleeve 1322 and the third rotating sleeve 1323 mentioned above, which will not be repeated in this application.

[0061] Specifically, as shown in Figures 10 and 12, the second rotating sleeve 1322 includes a second rotating body 13224 and a second limiting portion 13221. The second limiting portion 13221 includes a first stop portion 13222 and a second stop portion 13223. The first stop portion 13222 extends radially outward from the second rotating body 13224, and the second stop portion 13223 is disposed on a side of the second stop portion 13223 adjacent to the first rotating sleeve 1321. The first stop portion 13222 can abut against the third limiting portion 13231 along the circumference of the output shaft 12, while the second stop portion 13223 can abut against the first outer limiting portion 13212 along the circumference of the output shaft 12. This simplifies the structural design of the second limiting portion 13221 and facilitates assembly. The second limiting portion 13221 may be a hook-shaped structure, and the second stopping portion 13223 may be folded toward the first rotating sleeve 1321 , thereby further facilitating the processing and manufacturing of the second rotating sleeve 1322 and reducing production costs.

[0062] As can be understood, as shown in Figure 9, the outer diameter of the first rotating body 13213 is R3, and the outer diameter of the circle surrounding the first outer stopper 13212 is R4. The inner diameter of the circle surrounding the second stopper 13223 is K1, and the outer diameter of the circles surrounding the first and second stopper 13222 and 13223 is K2. K1>R3, R4>K2>R3. This ensures that after the first rotating sleeve 1321 rotates a certain angle, the second stopper 13223 and the first outer stopper 13212 can contact each other, driving the second rotating sleeve 1322 to rotate synchronously. The first outer stopper 13212 has two opposing stopper surfaces G3 and G4 arranged circumferentially around the output shaft 12. The first and second stopper 13222 and 13223 each have two opposing stopper surfaces G5 and G6 arranged circumferentially around the output shaft 12. When the first rotating sleeve 1321 rotates clockwise, the limiting surface G4 contacts the limiting surface G6 (when rotating counterclockwise, the limiting surface G3 contacts the limiting surface G5), thereby driving the second rotating sleeve 1322 to move clockwise (counterclockwise).

[0063] Further, as shown in Figures 11 and 12, the third rotating sleeve 1323 includes a third rotating body 13234 and a third limiting portion 13231. The third rotating body 13234 is sleeved on the output shaft 12. The third limiting portion 13231 includes a third stop portion 13232 and a fourth stop portion 13233. The third stop portion 13232 and the fourth stop portion 13233 are arranged on the outside of the third rotating body 13234 along the axial direction of the output shaft 12. The third stop portion 13232 is provided on a side of the third rotating sleeve 1323 adjacent to the second rotating sleeve 1322, and the fourth stop portion 13233 is provided on a side of the third rotating sleeve 1323 away from the second rotating sleeve 1322. The third stop portion 13232 can be abutted against the second limiting portion 13221 along the circumferential direction of the output shaft 12, and the fourth stop portion 13233 can be abutted against the fixing portion 112 along the circumferential direction of the output shaft 12. The corner limiting mechanism 1 of the embodiment of the present application sets the third limiting portion 13231 as the above-mentioned structure, so that the limiting structure design of the second rotating sleeve 1322 is simple and easy to disassemble and assemble, which is conducive to reducing production costs.

[0064] It can be understood that when the output shaft 12 is between the left limit position and the right limit position, the third stop portion 13232 and the first stop portion 13222 can be spaced apart along the circumferential direction of the output shaft 12, and the fourth stop portion 13233 and the fixing portion 112 can be spaced apart along the circumferential direction of the output shaft 12. When the output shaft 12 is at either the left limit position or the right limit position, the third stop portion 13232 and the first stop portion 13222 abut against each other along the circumferential direction of the output shaft 12, and the fourth stop portion 13233 abuts against the fixing portion 112 along the circumferential direction of the output shaft 12.

[0065] In other words, when the output shaft 12 is between the left limit position and the right limit position, the output shaft 12 drives the follower 131 to rotate, and after the linkage portion 1311 of the follower 131 contacts the first inner limit portion 13211 of the first rotating sleeve 1321, the first rotating sleeve 1321 can be driven to rotate synchronously, and when the first outer limit portion 13212 of the first rotating sleeve 1321 contacts the second stop portion 13223, the first rotating sleeve 1321 can drive the second rotating sleeve 1322 to rotate synchronously. After the first stop portion 13222 of the second rotating sleeve 1322 contacts the third stop portion 13232 of the third rotating sleeve 1323, the second rotating sleeve 1322 can drive the third rotating sleeve 1323 to rotate synchronously. When the fourth stop portion 13233 of the third rotating sleeve 1323 contacts the fixed portion 112, since the shell 11 is fixed relative to the reduction housing 21, the fixed portion 112 can limit the third rotating sleeve 1323 from continuing to rotate, thereby limiting the rotation angle of the output shaft 12.

[0066] As can be understood, as shown in Figures 9 and 12, the outer diameter of the circle encompassing the first stop 13222 and the second stop 13223 is K2, the outer diameter of the second rotating body 13224 is K3, and the inner diameter of the third stop 13232 is M1, where K3 < M1 < K2. This ensures that after the second rotating sleeve 1322 rotates a certain angle, the first stop 13222 and the third stop 13232 can contact each other, driving the second rotating sleeve 1322 to rotate synchronously. The third stop 13232 has two opposing stop surfaces G7 and G8 arranged along the circumference of the output shaft 12. When the second rotating sleeve 1322 rotates clockwise, the stop surface G5 contacts the stop surface G7 (when it rotates counterclockwise, the stop surface G6 contacts the stop surface G8), thereby driving the third rotating sleeve 1323 to move clockwise (or counterclockwise).

[0067] As shown in Figure 13, the fourth stopper 13233 has limiting surfaces G9 and G10 arranged opposite each other along the circumference of the output shaft 12, and the fixing portion 112 has limiting surfaces G11 and G12 arranged opposite each other along the circumference of the output shaft 12. When the third rotating sleeve 1323 rotates clockwise, limiting surface G10 contacts limiting surface G12 (when rotating counterclockwise, limiting surface G9 contacts limiting surface G11), indicating the output shaft 12 reaches its angular rotation limit.

[0068] It should be noted that the maximum rotation angle of the output shaft 12 can be controlled according to the number of stages of the rotating sleeve, the position and shape of the limiting structure of each stage of the rotating sleeve, that is, the maximum rotation angle of the output shaft 12 can be designed according to actual needs, and this application does not limit this.

[0069] In some embodiments, the interference fit between the first rotating sleeve 1321 and the driven member 131, and the interference fit between the inner holes of the second rotating sleeve 1322 and the inner holes of the third rotating sleeve 1323 and the output shaft 12 is H, 0.05mm≤H≤0.34mm. That is, the first rotating sleeve 1321 and the driven member 131 have an interference fit, and the inner holes of the second rotating sleeve 1322 and the inner holes of the third rotating sleeve 1323 have an interference fit with the output shaft 12. The inventors of this application have discovered through experimental research that when the interference fit H is less than 0.05mm, the damping force when the first rotating sleeve 1321, the second rotating sleeve 1322, and the third rotating sleeve 1323 rotate relative to the output shaft 12 is small, and the noise generated is significantly increased. When the interference fit H is greater than 0.05 mm, the damping force when the first rotating sleeve 1321, the second rotating sleeve 1322 and the third rotating sleeve 1323 rotate relative to the output shaft 12 is relatively large, which may easily cause the first rotating sleeve 1321, the second rotating sleeve 1322 and the third rotating sleeve 1323 to have difficulty in rotating, resulting in a poor user experience.

[0070] For example, H can be 0.05 mm, 0.1 mm, 0.15 mm, 0.2 mm, 0.25 mm, 0.3 mm, or 0.34 mm. This provides a certain damping force when the first rotating sleeve 1321, the second rotating sleeve 1322, and the third rotating sleeve 1323 rotate relative to the output shaft 12. This cushions the rotation of the first rotating sleeve 1321, the second rotating sleeve 1322, and the third rotating sleeve 1323, reducing the impact noise during operation of the angle limiting mechanism 1. This also does not affect the normal rotation of the first rotating sleeve 1321, the second rotating sleeve 1322, and the third rotating sleeve 1323, resulting in a better performance.

[0071] In addition, the interference fit of each level of rotating sleeve can be set in a gradient to meet actual usage requirements, and it is beneficial to reduce noise during use and increase the service life of parts. The matching material of the matching surface between the rotating sleeve and the output shaft 12 can also be selected according to actual usage requirements, for example, it can be wear-resistant, noise-reducing and other materials.

[0072] As shown in Figure 1, a steering system according to another embodiment of the present application includes a rotation angle limiting mechanism 1, a reduction mechanism 2, and a steering mechanism 3. The rotation angle limiting mechanism 1 is the rotation angle limiting mechanism 1 of the present application, wherein the output shaft 12 is fixedly connected to the reduction mechanism 2, which has an input shaft. The steering mechanism 3 includes a steering wheel and a steering shaft 31, wherein one end of the steering shaft 31 is fixedly connected to the steering wheel, and the other end of the steering shaft 31 is fixedly connected to the input shaft.

[0073] According to the steering system of the embodiment of the present application, when the output shaft 12 moves between the left and right extreme positions, the linkage portion 1311 can drive the rotating component 132 to rotate relative to the mounting cavity 111. At this time, the output shaft 12 and the driven member 131 can rotate relative to the rotating component 132, and the rotating component 132 can also rotate relative to the fixed member. When the output shaft 12 is at either the left or right extreme position, the linkage portion 1311 circumferentially abuts the rotating component 132, and the rotating component 132 circumferentially abuts the fixed portion 112, thereby limiting the rotation of the output shaft 12 relative to the mounting cavity 111 and limiting the rotation angle of the steering wheel, thereby achieving step-by-step transmission of the angle limiting mechanism 1. Therefore, the transmission structure of the angle limiting mechanism 1 of the steering system of the embodiment of the present application is simple, and the rotation component 132 uses a circumferential abutment method to limit the position, which can reduce the axial size of the angle limiting mechanism 1, making the angle limiting mechanism 1 compact and space-saving.

[0074] Another embodiment of the vehicle of the present application includes the steering system of the present application. The technical advantages of the vehicle of the embodiment of the present application are the same as the technical advantages of the steering system of the above embodiment, which will not be repeated here.

[0075] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0076] Furthermore, 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 the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0077] In this application, unless otherwise specified or limited, the terms "mounted," "fixedly connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections, electrical connections, or communication between them; direct fixed connections or indirect fixed connections through an intermediate medium; and internal communication between two components or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0078] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0079] In this application, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0080] Although the above embodiments have been shown and described, it is understood that the above embodiments are illustrative and cannot be understood as limitations on the present application. Changes, modifications, substitutions and variations of the above embodiments made by ordinary technicians in this field are all within the scope of protection of the present application.

Claims

1. A corner limiting mechanism, comprising: A housing (11), wherein a mounting cavity (111) is provided in the housing (11), and a fixing portion (112) is provided in the mounting cavity (111); An output shaft (12), the output shaft (12) passing through the mounting cavity (111), the output shaft (12) having a left limit position and a right limit position; A limit assembly (13), the limit assembly (13) is arranged in the installation cavity (111), the limit assembly (13) includes a driven member (131) and a rotating member (132), the driven member (131) is fixedly connected to the output shaft (12), a linkage portion (1311) is provided on the driven member (131), and the rotating member (132) is rotatably mounted on the output shaft (12). When between the left limit position and the right limit position, the linkage portion (1311) can drive the rotating component (132) to rotate relative to the installation cavity (111); when in either the left limit position or the right limit position, the linkage portion (1311) abuts against the rotating component (132) along the circumference of the output shaft (12), and the rotating component (132) abuts against the fixed portion (112) along the circumference of the output shaft (12), so as to limit the rotation of the output shaft (12) relative to the installation cavity (111).

2. The corner limiting mechanism according to claim 1, wherein: The rotating component (132) includes a first rotating sleeve (1321), an inner side of the first rotating sleeve (1321) is provided with a first inner limiting portion (13211), an outer side of the first rotating sleeve (1321) is provided with a first outer limiting portion (13212), the first rotating sleeve (1321) is sleeved on the driven member (131), and when between the left limit position and the right limit position, the linkage portion (1311) is circumferentially relative to the first limit portion (13212) along the output shaft (12). An inner limit portion (13211) is rotatable, and the first outer limit portion (13212) is rotatable relative to the fixed portion (112) along the circumference of the output shaft (12). When in either the left limit position or the right limit position, the linkage portion (1311) stops along the circumference of the output shaft (12) along the first inner limit portion (13211), and the first outer limit portion (13212) stops along the circumference of the output shaft (12) against the fixed portion (112).

3. The corner limiting mechanism according to claim 2, wherein: The driven member (131) comprises a shifting portion (1312), a mounting portion (1313) and a linkage portion (1311); one end of the mounting portion (1313) is fixedly connected to the shifting portion (1312); the other end of the mounting portion (1313) is fixedly connected to the output shaft (12); the first rotating sleeve (1321) is sleeved on the mounting portion (1313) and located between the output shaft (12) and the shifting portion (1312); and the linkage portion (1311) is provided on a side of the shifting portion (1312) adjacent to the mounting portion (1313).

4. The corner limiting mechanism according to claim 2 or 3, wherein: The rotating component (132) further includes a second rotating sleeve (1322), which is mounted on a side of the first rotating sleeve (1321) away from the driven member (131) and is rotatably connected to the output shaft (12). The outer side of the second rotating sleeve (1322) has a second limiting portion (13221). When the second limiting portion (13221) is between the left limit position and the right limit position, the second limiting portion (13221) is rotatable along the circumference of the output shaft (12) relative to at least one of the first outer limiting portion (13212) and the fixed portion (112). When the second limiting portion (13212) is at either the left limit position or the right limit position, the first outer limiting portion (13212) abuts against the second limiting portion (13221) along the circumference of the output shaft (12), and the second limiting portion (13221) abuts against the fixed portion (112) along the circumference of the output shaft (12).

5. The corner limiting mechanism according to claim 4, wherein: The rotating component (132) further includes a third rotating sleeve (1323), which is mounted on a side of the second rotating sleeve (1322) away from the first rotating sleeve (1321) and is rotatably connected to the output shaft (12). The outer side of the third rotating sleeve (1323) is provided with a third limiting portion (13231). When the third limiting portion (13231) is between the left limit position and the right limit position, the third limiting portion (13231) is rotatable along the circumference of the output shaft (12) relative to at least one of the second limiting portion (13221) and the fixed portion (112). When the third limiting portion (13221) is at either the left limit position or the right limit position, the second limiting portion (13221) abuts against the third limiting portion (13231) along the circumference of the output shaft (12), and the third limiting portion (13231) abuts against the fixed portion (112) along the circumference of the output shaft (12).

6. The corner limiting mechanism according to claim 5, wherein: The second limiting portion (13221) includes a first stop portion (13222) and a second stop portion (13223), wherein the first stop portion (13222) extends outwardly along the radial direction of the second rotating sleeve (1322), and the second stop portion (13223) is provided on a side of the second stop portion (13223) adjacent to the first rotating sleeve (1321), and the first stop portion (13222) can abut against the third limiting portion (13231) along the circumference of the output shaft (12), and the second stop portion (13223) can abut against the first outer limiting portion (13212) along the circumference of the output shaft (12).

7. The corner limiting mechanism according to claim 5 or 6, wherein: The third limiting portion (13231) includes a third stop portion (13232) and a fourth stop portion (13233). The third stop portion (13232) and the fourth stop portion (13233) are arranged on the third rotating sleeve (1323) along the axial direction of the output shaft (12). The third stop portion (13232) is provided on a side of the third rotating sleeve (1323) adjacent to the second rotating sleeve (1322). The fourth stop portion (13233) is provided on a side of the third rotating sleeve (1323) away from the second rotating sleeve (1322). The third stop portion (13232) can abut against the second limiting portion (13221) along the circumferential direction of the output shaft (12), and the fourth stop portion (13233) can abut against the fixing portion (112) along the circumferential direction of the output shaft (12).

8. The angle limiting mechanism according to any one of claims 5 to 7, wherein: The interference between the first rotating sleeve (1321) and the driven member (131), and the interference between the inner hole of the second rotating sleeve (1322) and the inner hole of the third rotating sleeve (1323) and the output shaft (12) are H, 0.05mm≤H≤0.34mm.

9. A steering system comprising: A corner limiting mechanism, wherein the corner limiting mechanism is the corner limiting mechanism according to any one of claims 1 to 8; A speed reduction mechanism (2), wherein the output shaft (12) is fixedly connected to the speed reduction mechanism (2), and the speed reduction mechanism (2) has an input shaft; A steering mechanism (3) comprises a steering wheel and a steering shaft (31), one end of the steering shaft (31) is fixedly connected to the steering wheel, and the other end of the steering shaft (31) is fixedly connected to the input shaft.

10. A vehicle comprising the steering system according to claim 9.

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