Corner limiting mechanism, steering system and vehicle

Abstract

The utility model relates to a kind of corner limiting mechanism, steering system and vehicle, corner limiting mechanism includes: shell, output shaft and limiting component.The shell is equipped with mounting cavity, fixed part is equipped in mounting cavity, output shaft is worn in mounting cavity, output shaft has left limit position and right limit position, limiting component is equipped in mounting cavity, limiting component includes driven part and rotating component, driven part is fixedly connected with output shaft, driven part is equipped with linkage portion, rotating component is rotatably installed on output shaft, when between left limit position and right limit position, linkage portion can drive rotating component relative mounting cavity rotation, when in any one of left limit position and right limit position, linkage portion is along the circumferential abutment rotating component of output shaft, rotating component is along the circumferential abutment fixed part of output shaft, to limit output shaft relative mounting cavity rotation.The structure of the corner limiting mechanism of the utility model is simple and compact, and occupies smaller space.

Description

Technical Field

[0001] This utility model relates to the field of vehicle technology, specifically to a cornering limit mechanism, a steering system, and a vehicle. Background Technology

[0002] In a vehicle's steering system, manufacturers typically add a steering angle limiting mechanism to restrict the range of steering wheel rotation angles. This limiting mechanism prevents the steering wheel from continuing to rotate in that direction when the driver turns it clockwise or counterclockwise by a certain angle, thereby protecting the vehicle's steering system and ensuring driving safety.

[0003] In related technologies, the angle limiting mechanism adopts the form of nut and screw and planetary gear assembly, etc., but the above design schemes are complex in structure and occupy a large space in the steering system. Utility Model Content

[0004] This utility model aims to at least partially solve one of the technical problems in the related art.

[0005] Therefore, embodiments of this utility model propose a corner limiting mechanism, which has a simple and compact structure and occupies less space.

[0006] An embodiment of this utility model also proposes a steering system.

[0007] An embodiment of this utility model also proposes a vehicle.

[0008] The corner limiting mechanism of this utility model includes: a housing, wherein a mounting cavity is provided inside the housing, and a fixing part is provided inside the mounting cavity; an output shaft, wherein the output shaft passes through the mounting cavity, and the output shaft has a left limit position and a right limit position; and a limiting component, wherein the limiting component is disposed inside the mounting cavity, the limiting component includes a driven member and a rotating member, the driven member is fixedly connected to the output shaft, the driven member is provided with a linkage part, and the rotating member is rotatably mounted on the output shaft. When the output shaft is between the left limit position and the right limit position, the linkage part can drive the rotating member to rotate relative to the mounting cavity. When the output shaft is between the left limit position and the right limit position, the linkage part abuts against the rotating member in the circumferential direction of the output shaft, and the rotating member abuts against the fixing part in the circumferential direction of the output shaft, thereby limiting the rotation of the output shaft relative to the mounting cavity.

[0009] According to the corner limiting mechanism of this utility model, when the output shaft moves between the left and right extreme positions, the linkage can drive the rotating component to rotate relative to the mounting cavity. At this time, the output shaft and the driven component can rotate relative to the rotating component, and the rotating component can also rotate relative to the fixed component. When the output shaft is at either the left or right extreme position, the linkage stops the rotating component circumferentially along the output shaft, and the rotating component stops the fixed component circumferentially along the output shaft, thereby limiting the rotation of the output shaft relative to the mounting cavity and limiting the rotation angle of the steering wheel, thus realizing the step-by-step transmission of the corner limiting mechanism. Therefore, the transmission structure of the corner limiting mechanism of this utility model is simple, and the rotating component uses a circumferential stop for limiting, which can reduce the axial dimension of the corner limiting mechanism, making the corner limiting mechanism compact and occupying less space.

[0010] In some embodiments, the rotating component includes a first rotating sleeve, the inner side of which is provided with a first inner limiting portion, and the outer side of which is provided with a first outer limiting portion. The first rotating sleeve is sleeved on the driven member. When the first rotating sleeve is between the left limit position and the right limit position, the linkage portion is rotatable relative to the first inner limiting portion along the circumference of the output shaft, and the first outer limiting portion is rotatable relative to the fixed portion along the circumference of the output shaft. When the first rotating sleeve is between the left limit position and the right limit position, the linkage portion abuts against the first inner limiting portion along the circumference of the output shaft, and the first outer limiting portion abuts against the fixed portion along the circumference of the output shaft.

[0011] In some embodiments, the driven member includes a gear position, a mounting portion, and a linkage portion. One end of the mounting portion is fixedly connected to the gear position, and the other end of the mounting portion is fixedly connected to the output shaft. The first rotating sleeve is sleeved on the mounting portion and located between the output shaft and the gear position. The linkage portion is located on the side of the gear position adjacent to the mounting portion.

[0012] In some embodiments, the rotating component further includes a second rotating sleeve, which is mounted 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. Between the left limit position and the right limit position, the second limiting portion is rotatable relative to at least one of the first outer limiting portion and the fixed portion along the circumference of the output shaft. In either the left limit position or the right limit position, the first outer limiting portion abuts against the second limiting portion along the circumference of the output shaft, and the second limiting portion abuts against the fixed portion along the circumference of the output shaft.

[0013] In some embodiments, the rotating component further includes a third rotating sleeve, which is mounted on the side of the second rotating sleeve opposite to 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 the third rotating sleeve is between the left limit position and the right limit position, the third limiting portion is rotatable relative to at least one of the second limiting portion and the fixed portion along the circumferential direction of the output shaft. When the third limiting portion is between the left limit position and the right limit position, the second limiting portion abuts against the third limiting portion along the circumferential direction of the output shaft, and the third limiting portion abuts against the fixed portion along the circumferential direction of the output shaft.

[0014] In some embodiments, the second limiting portion includes a first stop portion and a second stop portion. The first stop portion extends radially outward along the second rotating sleeve, and the second stop portion is disposed on the side of the second stop portion adjacent to the first rotating sleeve. The first stop portion can abut against the third limiting portion along the circumference of the output shaft, and the second stop portion can abut against the first outer limiting portion along the circumference of the output shaft.

[0015] In some embodiments, the third limiting portion includes a third stop portion and a fourth stop portion, which are arranged on the third rotating sleeve along the axial direction of the output shaft. The third stop portion is located on the side of the third rotating sleeve adjacent to the second rotating sleeve, and the fourth stop portion is located on the side of the third rotating sleeve opposite to the second rotating sleeve. The third stop portion can abut against the second limiting portion along the circumferential direction of the output shaft, and the fourth stop portion can abut against the fixing portion along the circumferential direction of the output shaft.

[0016] In some embodiments, the interference fit between the first rotating sleeve and the driven member, and the interference fit between the inner hole of the second rotating sleeve and the inner hole of the third rotating sleeve and the output shaft are H, where 0.05mm≤H≤0.34mm.

[0017] Another embodiment of the steering system of this utility model includes: an angle limiting mechanism, wherein the angle limiting mechanism is the angle limiting mechanism described in any one of the embodiments of this utility model; a deceleration mechanism, wherein the output shaft is fixedly connected to the deceleration mechanism, and the deceleration mechanism has an input shaft; and a steering mechanism, wherein the steering mechanism includes a steering wheel and a steering shaft, wherein 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.

[0018] According to the steering system of this utility model embodiment, when the output shaft moves between the left and right extreme positions, the linkage can drive the rotating component to rotate relative to the mounting cavity. At this time, the output shaft and the driven component can rotate relative to the rotating component, and the rotating component can also rotate relative to the fixed component. When the output shaft is at either the left or right extreme position, the linkage stops the rotating component circumferentially along the output shaft, and the rotating component stops the fixed component circumferentially along the output shaft, thereby limiting the rotation of the output shaft relative to the mounting cavity and limiting the rotation angle of the steering wheel, thus 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 this utility model embodiment is simple, and the rotating component uses a circumferential stop for limiting, which can reduce the axial dimension of the angle limiting mechanism, making the structure of the angle limiting mechanism compact and occupying less space.

[0019] Another embodiment of the vehicle of the present invention includes the steering system described in the embodiments of the present invention.

[0020] In the vehicle according to an embodiment of the present invention, when the output shaft moves between its left and right extreme positions, the linkage can drive the rotating component to rotate relative to the mounting cavity. At this time, the output shaft and the driven component can rotate relative to the rotating component, and the rotating component can also rotate relative to the fixed component. When the output shaft is at either the left or right extreme position, the linkage stops the rotating component circumferentially along the output shaft, and the rotating component stops the fixed component circumferentially along the output shaft, thereby limiting the rotation of the output shaft relative to the mounting cavity and limiting the steering wheel rotation angle. This achieves a step-by-step transmission of the angle limiting mechanism. Therefore, the transmission structure of the angle limiting mechanism in the vehicle according to the embodiment of the present invention is simple, and the circumferential stopping of the rotating component reduces the axial dimension of the angle limiting mechanism, making the structure compact and space-saving. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the steering system according to an embodiment of the present invention.

[0022] Figure 2 This is an exploded view of the corner limiting mechanism according to an embodiment of the present invention.

[0023] Figure 3 The corner limiting mechanism of this utility model embodiment is along Figure 1 The cross-sectional view of section line AA in the diagram.

[0024] Figure 4 This is a schematic diagram of the output shaft of the corner limiting mechanism according to an embodiment of the present invention.

[0025] Figure 5 This is a front view of the driven component of the corner limiting mechanism according to an embodiment of the present utility model.

[0026] Figure 6 yes Figure 5 Cross-sectional view of BB.

[0027] Figure 7 This is a front view of the installation of the driven member and the first rotating sleeve of the corner limiting mechanism according to an embodiment of the present utility model.

[0028] Figure 8 yes Figure 7 Cross-sectional view of CC.

[0029] Figure 9 This is a front view of the installation of the first rotating sleeve and the second rotating sleeve of the corner limiting mechanism according to an embodiment of this utility model.

[0030] Figure 10 yes Figure 9 Cross-sectional view of DD.

[0031] Figure 11 This is a front view of the installation of the first rotating sleeve, the second rotating sleeve, and the third rotating sleeve of the corner limiting mechanism according to an embodiment of this utility model.

[0032] Figure 12 yes Figure 11 Cross-sectional view of EE.

[0033] Figure 13 This is the main installation view of the corner limiting mechanism (after removing the output shaft and the driven member) according to an embodiment of this utility model.

[0034] Figure 14 yes Figure 13 Cross-sectional view of FF.

[0035] Figure label:

[0036] 1. Cornering limit mechanism;

[0037] 11. Housing; 111. Mounting cavity; 112. Fixing part; 113. Mounting hole;

[0038] 12. Output shaft; 121. Mounting slot;

[0039] 13. Limiting assembly; 131. Follower; 1311. Linkage part; 1312. Stop part; 1313. Mounting part; 132. Rotating component; 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;

[0040] 2. Reduction mechanism; 21. Reduction housing;

[0041] 3. Steering mechanism; 31. Steering shaft. Detailed Implementation

[0042] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0043] The following is a reference appendix. Figures 1 to 14 This invention describes an embodiment of a corner limiting mechanism 1, a steering system, and a vehicle.

[0044] The corner limiting mechanism 1 of this utility model embodiment includes: a housing 11, an output shaft 12, and a limiting component 13. The housing 11 has a mounting cavity 111, and a fixing part 112 is provided within the mounting cavity 111. The output shaft 12 passes through the mounting cavity 111 and has a left limit position and a right limit position. The limiting component 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, and a linkage part 1311 is provided on the driven member 131. The rotating member 132 is rotatably mounted on the output shaft 12.

[0045] When the left and right extreme positions are between, the linkage 1311 can drive the rotating component 132 to rotate relative to the mounting cavity 111. When either the left or right extreme position is in either position, the linkage 1311 stops the rotating component 132 in the circumferential direction of the output shaft 12, and the rotating component 132 stops the fixed part 112 in the circumferential direction of the output shaft 12 to restrict the rotation of the output shaft 12 relative to the mounting cavity 111.

[0046] It is understandable that the left limit position corresponds to the limit position of the steering wheel (not shown) rotating counterclockwise, and the right limit position corresponds to the limit position of the steering wheel rotating clockwise, thereby limiting the rotation angle of the steering wheel.

[0047] According to the corner limiting mechanism 1 of this utility model, when the output shaft 12 moves between the left and right extreme positions, the linkage 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 component 131 can rotate relative to the rotating component 132, and the rotating component 132 can also rotate relative to the fixed component. When the output shaft 12 is at either the left or right extreme position, the linkage 1311 stops the rotating component 132 circumferentially along the output shaft 12, and the rotating component 132 stops the fixed component 112 circumferentially along the output shaft 12, thereby limiting the rotation of the output shaft 12 relative to the mounting cavity 111 and limiting the rotation angle of the steering wheel, thus realizing the step-by-step transmission of the corner limiting mechanism 1. Therefore, the transmission structure of the corner limiting mechanism 1 of this utility model is simple, and the rotating component 132 adopts the form of circumferential stopping for limiting, which can reduce the axial dimension of the corner limiting mechanism 1, so that the corner limiting mechanism 1 has a compact structure and occupies less space.

[0048] It is understandable that, such as Figure 2 , Figure 3 and Figure 14 As shown, the housing 11 has a mounting hole 113 that communicates with the mounting cavity 111. One end of the output shaft 12 passes through the mounting hole 113 and is inserted into the mounting cavity 111. 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, so that when the output shaft 12 drives the rotating component 132 to rotate, the housing 11 can remain fixed.

[0049] In some embodiments, the rotating component 132 may include one or more rotating sleeves.

[0050] Specifically, such as Figures 7 to 9 As shown, 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 limiting part 13211, and the outer side of the first rotating sleeve 1321 is provided with a first outer limiting part 13212. The first rotating sleeve 1321 is sleeved on the driven component 131. When the left limit position and the right limit position are between, the linkage part 1311 can rotate relative to the first inner limiting part 13211 along the circumference of the output shaft 12, and the first outer limiting part 13212 can rotate relative to the fixed part 112 along the circumference of the output shaft 12. When either the left limit position or the right limit position is in either position, the linkage part 1311 stops at the first inner limiting part 13211 along the circumference of the output shaft 12, and the first outer limiting part 13212 stops at the fixed part 112 along the circumference of the output shaft 12.

[0051] Understandably, when the left and right extreme positions are between, the linkage 1311 is spaced apart from the first inner limit 13211 along the circumference of the output shaft 12, so that the linkage 1311 can rotate within a certain angle range, and the first inner limit 13211 will not interfere with the rotation of the linkage 1311; similarly, the first outer limit 13212 is spaced apart from the fixing part 112 along the circumference of the output shaft 12, so that the first outer limit 13212 can rotate within a certain angle range.

[0052] When the linkage 1311 moves to either the left or right extreme position, the linkage 1311 abuts against one side of the first inner limiting part 13211 along the circumference of the output shaft 12, and the first outer limiting part 13212 abuts against the fixing part 112 along the circumference of the output shaft 12. At this time, any one of the output shaft 12, the driven member 131, and the rotating member 132 is fixed relative to the housing 11, thereby limiting the rotation angle of the output shaft 12. The corner limiting mechanism 1 of this embodiment of the present invention, by setting the first rotating sleeve 1321 to the above structure, is beneficial to further reduce the axial dimension of the corner limiting mechanism 1, reduce the space occupied by the corner limiting mechanism 1, and has a simple structural design and low cost.

[0053] It should be noted that the first outer limiting part 13212 abuts against the fixing part 112 indirectly or directly along the circumference of the output shaft 12. For example, when the rotating component 132 has only one rotating sleeve (first rotating sleeve 1321), the first outer limiting part 13212 abuts against the fixing part 112 directly along the circumference of the output shaft 12, thereby limiting the angle of the rotating component 132 and the output shaft 12. When the rotating component 132 includes multiple rotating sleeves, the first rotating sleeve 1321 can abut against the fixing part 112 indirectly through other rotating sleeves (second rotating sleeve 1322 or third rotating sleeve 1323).

[0054] Furthermore, such as Figures 5 to 8 As shown, the driven member 131 includes a stop portion 1312, a mounting portion 1313, and a linkage portion 1311. One end of the mounting portion 1313 is fixedly connected to the stop 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 stop portion 1312. The linkage portion 1311 is located on the side of the stop portion 1312 adjacent to the mounting portion 1313. The mounting portion 1313 and the output shaft 12 can be connected in an anti-rotation manner by an interference fit, that is, the mounting portion 1313 and the output shaft 12 will not rotate relative to each other after installation. For example, the port 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, which facilitates the assembly of the limiting component 13, and the structure design is simple and easy to manufacture.

[0055] The first rotating sleeve 1321 is fitted onto the mounting portion 1313 and located between the output shaft 12 and the gear position portion 1312. The linkage portion 1311 is located on the side of the gear position portion 1312 adjacent to the mounting portion 1313. It can be understood that the outer diameter of the gear position portion 1312 is larger than the inner diameter of the first rotating sleeve 1321, thereby preventing the first rotating sleeve 1321 from dislodging from the gear position portion 1312 in a direction away from the output shaft 12.

[0056] For example, the first rotating sleeve 1321 includes a first rotating body 13213, a first inner limiting part 13211 and a first outer limiting part 13212. The first inner limiting part 13211 and the first outer limiting part 13212 are respectively provided on the inner and outer sides of the first rotating body 13213 along the radial direction of the first rotating body 13213.

[0057] The inner diameter R1 of the circle containing the first inner limiting part 13211 can be larger than the outer diameter r1 of the mounting part 1313 to ensure that the first rotating body 13213 will not interfere with the driven member 131 when it rotates. At the same time, the outer diameter r2 of the stop part 1312 is smaller than the inner diameter R2 of the first rotating body 13213 but larger than the inner diameter R1 of the circle containing the first inner limiting part 13211 to ensure that after the driven member 131 rotates a certain angle, the linkage part 1311 can contact the first inner limiting part 13211 of the first rotating sleeve 1321.

[0058] It is understandable that, such as Figure 7 As shown, the linkage 1311 has a limiting surface g1 and a limiting surface g2 arranged opposite to each other in the circumference of the output shaft 12, and the first inner limiting part 13211 has a limiting surface G1 and a limiting surface G2 arranged opposite to each other in the circumference of the output shaft 12. When the driven member 131 rotates clockwise, the limiting surface g1 contacts the limiting surface G1 (when it rotates counterclockwise, the limiting surface g2 contacts the limiting surface G2), thereby driving the first rotating sleeve 1321 to move clockwise (counterclockwise).

[0059] In some embodiments, such as Figure 2 , Figure 9 and Figure 10As shown, the rotating component 132 also includes a second rotating sleeve 1322. The second rotating sleeve 1322 is installed on the 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 between the left limit position and the right limit position, the second limiting portion 13221 can rotate relative to at least one of the first outer limiting portion 13212 and the fixed portion 112 in the circumferential direction of the output shaft 12. When in either the left limit position or the right limit position, the first outer limiting portion 13212 abuts against the second limiting portion 13221 in the circumferential direction of the output shaft 12, and the second limiting portion 13221 abuts against the fixed portion 112 in the circumferential direction of the output shaft 12. It is understandable that the second limiting part 13221 can stop both the first outer limiting part 13212 and the fixed part 112, thereby further reducing the structural size of the rotating part 132 without affecting the transmission effect of the rotating part 132.

[0060] It should be noted that the second limiting part 13221 directly or indirectly abuts against the fixing part 112 along the circumference of the output shaft 12. For example, when the rotating component 132 has only two rotating sleeves (the first rotating sleeve 1321 and the second rotating sleeve 1322), the second limiting part 13221 directly abuts against the fixing part 112 along the circumference of the output shaft 12, thereby limiting the angle of the rotating component 132 and the output shaft 12. When the rotating component 132 includes multiple rotating sleeves, the second rotating sleeve 1322 can indirectly abut against the fixing part 112 through other rotating sleeves (the third rotating sleeve 1323).

[0061] In another example, such as Figure 2 , Figure 11 and Figure 12 As shown, the rotating component 132 also includes a third rotating sleeve 1323. The third rotating sleeve 1323 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 part 13231. When between the left limit position and the right limit position, the third limiting part 13231 can rotate relative to at least one of the second limiting part 13221 and the fixed part 112 in the circumferential direction of the output shaft 12. When in either the left limit position or the right limit position, the second limiting part 13221 abuts against the third limiting part 13231 in the circumferential direction of the output shaft 12, and the third limiting part 13231 abuts against the fixed part 112 in the circumferential direction of the output shaft 12.

[0062] When the output shaft 12 is between the left and right extreme positions, the linkage part 1311 of the follower 131 and the first inner limiting part 13211 of the first rotating sleeve 1321 can be spaced apart along the circumference of the output shaft 12. At least one of the first outer limiting part 13212 and the third limiting part 13231 is spaced apart from the second limiting part 13221 of the second rotating sleeve 1322 along the circumference of the output shaft 12. The third limiting part 13231 is spaced apart from the fixing part 112 along the circumference of the output shaft 12. At this time, the output shaft 12 can rotate relative to the housing 11.

[0063] When the output shaft 12 is in either the left or right extreme position, the linkage part 1311 of the follower 131 and the first inner limiting part 13211 of the first rotating sleeve 1321 abut against each other along the output shaft 12, either the first outer limiting part 13212 or the third limiting part 13231 abuts against the second limiting part 13221 of the second rotating sleeve 1322 along the circumference of the output shaft 12, and the third limiting part 13231 abuts against the fixing part 112 along the circumference of the output shaft 12. This limits the angle of the output shaft 12 to prevent the output shaft 12 from continuing to rotate in a clockwise or counterclockwise direction.

[0064] Of course, the rotating component 132 can also have three or more rotating sleeves for step-by-step transmission. The 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, and will not be described in detail here.

[0065] Specifically, such as Figure 10 and Figure 12 As shown, the second rotating sleeve 1322 includes a second rotating body 13224 and a second limiting part 13221. The second limiting part 13221 includes a first stop part 13222 and a second stop part 13223. The first stop part 13222 extends radially outward along the second rotating body 13224. The second stop part 13223 is located on the side of the second stop part 13223 adjacent to the first rotating sleeve 1321. The first stop part 13222 can abut against the third limiting part 13231 along the circumference of the output shaft 12, and the second stop part 13223 can abut against the first outer limiting part 13212 along the circumference of the output shaft 12. This makes the structural design of the second limiting part 13221 simpler and easier to assemble. The second limiting part 13221 can be a hook-shaped structure, and the second stop part 13223 is folded toward the first rotating sleeve 1321, which can further facilitate the processing and manufacturing of the second rotating sleeve 1322 and reduce production costs.

[0066] It is understandable that, such as Figure 9As shown, the outer diameter of the first rotating body 13213 is R3, and the outer diameter of the circle containing the first outer limiting part 13212 is R4. The inner diameter of the circle containing the second stop part 13223 is K1, and the outer diameter of the circles containing the first stop part 13222 and the second stop part 13223 is K2. K1 > R3, R4 > K2 > R3. This ensures that after the first rotating sleeve 1321 rotates by a certain angle, the second stop part 13223 can contact the first outer limiting part 13212 and drive the second rotating sleeve 1322 to rotate synchronously. The first outer limiting part 13212 has limiting surfaces G3 and G4 arranged opposite each other in the circumference of the output shaft 12, and the first stop part 13222 and the second stop part 13223 both have limiting surfaces G5 and G6 arranged opposite each other in the circumference of the output shaft 12. When the first rotating sleeve 1321 rotates clockwise, the limiting surface G4 contacts the limiting surface G6 (when it rotates counterclockwise, the limiting surface G3 contacts the limiting surface G5), thereby driving the second rotating sleeve 1322 to move clockwise (counterclockwise).

[0067] Furthermore, such as Figure 11 and Figure 12 As shown, the third rotating sleeve 1323 includes a third rotating body 13234 and a third limiting part 13231. The third rotating body 13234 is sleeved on the output shaft 12. The third limiting part 13231 includes a third stop part 13232 and a fourth stop part 13233. The third stop part 13232 and the fourth stop part 13233 are arranged on the outside of the third rotating body 13234 along the axial direction of the output shaft 12. The third stop part 13232 is located on the side of the third rotating sleeve 1323 adjacent to the second rotating sleeve 1322, and the fourth stop part 13233 is located on the side of the third rotating sleeve 1323 away from the second rotating sleeve 1322. The third stop part 13232 can abut against the second limiting part 13221 along the circumference of the output shaft 12, and the fourth stop part 13233 can abut against the fixing part 112 along the circumference of the output shaft 12. The corner limiting mechanism 1 of this utility model, by setting the third limiting part 13231 to the above structure, makes the limiting structure design of the second rotating sleeve 1322 simple, easy to disassemble and assemble, and helps to reduce production costs.

[0068] Understandably, when the output shaft 12 is between its left and right extreme positions, the third stop portion 13232 and the first stop portion 13222 can be spaced apart circumferentially from the output shaft 12, and the fourth stop portion 13233 and the fixing portion 112 can be spaced apart circumferentially from the output shaft 12. When the output shaft 12 is at either its left or right extreme position, the third stop portion 13232 and the first stop portion 13222 abut against each other circumferentially from the output shaft 12, and the fourth stop portion 13233 abuts against the fixing portion 112 circumferentially from the output shaft 12.

[0069] In other words, when the output shaft 12 is between its left and right extreme positions, the output shaft 12 drives the driven member 131 to rotate. After the linkage part 1311 of the driven member 131 contacts the first inner limit part 13211 of the first rotating sleeve 1321, it can drive the first rotating sleeve 1321 to rotate synchronously. When the first outer limit part 13212 of the first rotating sleeve 1321 contacts the second stop part 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 housing 11 is fixed relative to the deceleration housing 21, the fixed portion 112 can restrict the third rotating sleeve 1323 from continuing to rotate, thereby limiting the rotation angle of the output shaft 12.

[0070] It is understandable that, such as Figure 9 and Figure 12 As shown, the outer diameter of the circle containing the first stop portion 13222 and the second stop portion 13223 is K2, the outer diameter of the second rotating body 13224 is K3, and the inner diameter of the third stop portion 13232 is M1, where K3 < M1 < K2. This ensures that after the second rotating sleeve 1322 rotates a certain angle, the first stop portion 13222 and the third stop portion 13232 can contact each other, driving the second rotating sleeve 1322 to rotate synchronously. The third stop portion 13232 has limiting surfaces G7 and G8 arranged circumferentially opposite each other along the output shaft 12. When the second rotating sleeve 1322 rotates clockwise, limiting surface G5 contacts limiting surface G7 (and when it rotates counterclockwise, limiting surface G6 contacts limiting surface G8), thereby driving the third rotating sleeve 1323 to move clockwise (counterclockwise).

[0071] like Figure 13 As shown, the fourth stop portion 13233 has a limiting surface G9 and a limiting surface G10 arranged opposite each other along the circumference of the output shaft 12, and the fixing portion 112 has a limiting surface G11 and a limiting surface G12 arranged opposite each other along the circumference of the output shaft 12. When the third rotating sleeve 1323 rotates clockwise, the limiting surface G10 contacts the limiting surface G12 (when it rotates counterclockwise, the limiting surface G9 contacts the limiting surface G11), which is the limit position of the angular rotation of the output shaft 12.

[0072] 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 and 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 it.

[0073] 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 third rotating sleeve 1323 and the output shaft 12, is H, where 0.05mm ≤ H ≤ 0.34mm. That is, the first rotating sleeve 1321 is interference-fitted with the driven member 131, and the inner holes of the second rotating sleeve 1322 and the third rotating sleeve 1323 are interference-fitted 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, resulting in a significant increase in noise. When the interference fit H is greater than 0.05mm, the damping force of the first rotating sleeve 1321, the second rotating sleeve 1322 and the third rotating sleeve 1323 is large when they rotate relative to the output shaft 12, which can easily cause the first rotating sleeve 1321, the second rotating sleeve 1322 and the third rotating sleeve 1323 to have difficulty rotating, resulting in a poor user experience.

[0074] For example, H can be 0.05mm, 0.1mm, 0.15mm, 0.2mm, 0.25mm, 0.3mm, or 0.34mm. This allows the first rotating sleeve 1321, the second rotating sleeve 1322, and the third rotating sleeve 1323 to rotate relative to the output shaft 12 with a certain damping force. This buffers the rotation of the first rotating sleeve 1321, the second rotating sleeve 1322, and the third rotating sleeve 1323, reducing the impact noise during the operation of the angle limiting mechanism 1. Furthermore, it 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 good performance.

[0075] In addition, the interference fit of each rotating sleeve can be set in gradients to meet the actual use requirements, which is beneficial to reduce noise during use and increase the service life of parts. The mating material of the mating surface between the rotating sleeve and the output shaft 12 can also be selected according to the actual use requirements, such as wear-resistant and noise-reducing materials.

[0076] like Figure 1 As shown, another embodiment of the steering system of this utility model includes: an angle limiting mechanism 1, a deceleration mechanism 2, and a steering mechanism 3. The angle limiting mechanism 1 is the angle limiting mechanism 1 of this utility model. The output shaft 12 is fixedly connected to the deceleration mechanism 2. The deceleration mechanism 2 has an input shaft. The steering mechanism 3 includes 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.

[0077] According to the steering system of this embodiment, when the output shaft 12 moves between the left and right extreme positions, the linkage 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 component 131 can rotate relative to the rotating component 132, and the rotating component 132 can also rotate relative to the fixed component. When the output shaft 12 is at either the left or right extreme position, the linkage 1311 stops the rotating component 132 circumferentially along the output shaft 12, and the rotating component 132 stops the fixed component 112 circumferentially along the output shaft 12, thereby limiting the rotation of the output shaft 12 relative to the mounting cavity 111 and limiting the rotation angle of the steering wheel, thus realizing the 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 this embodiment is simple, and the circumferential stop of the rotating component 132 can reduce the axial dimension of the angle limiting mechanism 1, making the structure of the angle limiting mechanism 1 compact and occupying less space.

[0078] Another embodiment of the vehicle of this utility model includes the steering system of this utility model. The technical advantages of the vehicle of this utility model embodiment are the same as the technical advantages of the steering system of the above embodiments, and will not be repeated here.

[0079] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0080] 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 indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0081] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "fixed connection," "connection," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between the components; they can refer to a direct fixed connection or an indirect fixed connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0082] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0083] In this utility model, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0084] Although the above embodiments have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions and variations made to the above embodiments by those skilled in the art are within the protection scope of the present invention.

Claims

1. A corner limiting mechanism, characterized by, include: A housing (11) is provided with a mounting cavity (111) inside the housing (11), and a fixing part (112) is provided inside the mounting cavity (111); An output shaft (12) is provided in the mounting cavity (111) and has a left limit position and a right limit position. A limiting component (13) is disposed within the mounting cavity (111). The limiting component (13) includes a driven member (131) and a rotating member (132). The driven member (131) is fixedly connected to the output shaft (12). The driven member (131) is provided with a linkage part (1311). The rotating member (132) is rotatably mounted on the output shaft (12). Between the left and right extreme positions, the linkage (1311) can drive the rotating component (132) to rotate relative to the mounting cavity (111). In either the left or right extreme position, the linkage (1311) abuts against the rotating component (132) circumferentially along the output shaft (12), and the rotating component (132) abuts against the fixing part (112) circumferentially along the output shaft (12) to restrict the rotation of the output shaft (12) relative to the mounting cavity (111).

2. The corner limiting mechanism of claim 1, wherein 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 limiting portion (13211), and the 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). When the driven member is between the left limit position and the right limit position, the linkage portion (1311) moves relative to the driven member (131) along the circumferential direction of the output shaft (12). An inner limiting part (13211) is rotatable, and a first outer limiting part (13212) is rotatable relative to the fixed part (112) along the circumference of the output shaft (12). In either the left limit position or the right limit position, the linkage part (1311) abuts against the first inner limiting part (13211) along the circumference of the output shaft (12), and the first outer limiting part (13212) abuts against the fixed part (112) along the circumference of the output shaft (12).

3. The corner limiting mechanism of claim 2, wherein The driven member (131) includes a stop part (1312), a mounting part (1313) and a linkage part (1311). One end of the mounting part (1313) is fixedly connected to the stop part (1312), and the other end of the mounting part (1313) is fixedly connected to the output shaft (12). The first rotating sleeve (1321) is sleeved on the mounting part (1313) and located between the output shaft (12) and the stop part (1312). The linkage part (1311) is located on the side of the stop part (1312) adjacent to the mounting part (1313).

4. The corner limiting mechanism of claim 2, wherein The rotating component (132) further includes a second rotating sleeve (1322), which is mounted on the 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 rotating sleeve (1322) is between the left limit position and the right limit position, the second limiting portion (13221) is rotatable relative to at least one of the first outer limiting portion (13212) and the fixed portion (112) along the circumferential direction of the output shaft (12). When the second rotating sleeve (13221) is in 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 circumferential direction of the output shaft (12), and the second limiting portion (13221) abuts against the fixed portion (112) along the circumferential direction of the output shaft (12).

5. The corner limiting mechanism of claim 4, wherein The rotating component (132) further 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 part (13231). When the third rotating sleeve (1323) is between the left limit position and the right limit position, the third limiting part (13231) is rotatable relative to at least one of the second limiting part (13221) and the fixed part (112) along the circumferential direction of the output shaft (12). When the third limiting part (13221) is in either the left limit position or the right limit position, the second limiting part (13221) abuts against the third limiting part (13231) along the circumferential direction of the output shaft (12), and the third limiting part (13231) abuts against the fixed part (112) along the circumferential direction of the output shaft (12).

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

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

8. The corner limiting mechanism of claim 5, wherein, The interference fit between the first rotating sleeve (1321) and the driven member (131), and the interference fit 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 characterized by, include: A corner limiting mechanism, wherein the corner limiting mechanism is any one of the corner limiting mechanisms described in claims 1-8; A speed reduction mechanism (2) is provided, wherein the output shaft (12) is fixedly connected to the speed reduction mechanism (2), and the speed reduction mechanism (2) has an input shaft. Steering mechanism (3), the steering mechanism (3) includes 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 characterized by comprising: Includes the steering system as described in claim 9.

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