Corner module self-locking device, steering system and vehicle

Abstract

The utility model relates to a kind of angle module self-locking device, steering system and vehicle, the coupling includes shell, first transmission disc and second transmission disc, and shell is equipped with through-hole;First transmission disc and second transmission disc are both located in shell, and first transmission disc is equipped with shift fork, and second transmission disc is equipped with the meshing groove for shift fork insertion, the bottom wall of meshing groove includes wedge surface, and roller is equipped on wedge surface, when second transmission disc rotates to assembly position, through-hole can communicate the space in meshing groove, the coupling can reduce the idle stroke of the coupling structure of bidirectional overrunning clutch inside, reduce assembly difficulty, improve the performance of bidirectional overrunning clutch.

Description

Technical Field

[0001] This utility model relates to the field of vehicle technology, specifically to a corner module self-locking device, a steering system, and a vehicle. Background Technology

[0002] In related technologies, the wheel-side kingpin steering system of a vehicle typically employs a reverse self-locking function to reduce wheel deviation when turning or subjected to external impacts. The principle of self-locking is achieved by using the angle module self-locking device structure of the two-way overrunning clutch to provide different torques to the wheels on both sides. However, during the assembly of the angle module self-locking device structure of the two-way overrunning clutch, there are often problems such as a large gap between the internal shift fork and the cylindrical roller, resulting in a large idle stroke in torque transmission. Furthermore, the relative position of the internal shift fork and the cylindrical roller cannot be directly observed from the external assembly, which in turn affects the performance of the two-way overrunning clutch. Utility Model Content

[0003] Based on the above-mentioned technical problems, this utility model provides an angle module self-locking device, a steering system, and a vehicle to reduce the internal free travel of the angle module self-locking device structure of the bidirectional overrunning clutch, reduce assembly difficulty, and improve the performance of the bidirectional overrunning clutch, so as to at least partially solve the above-mentioned technical problems.

[0004] In a first aspect, this utility model provides a corner module self-locking device, comprising: a housing, wherein the housing is provided with at least one set of through holes; a first transmission disk and a second transmission disk, both coaxially disposed within the housing, the first transmission disk being provided with an axially protruding fork, the second transmission disk being provided with an engagement groove for the fork to be inserted, the bottom wall of the engagement groove including a wedge surface, each wedge surface being provided with a roller; when the second transmission disk rotates to the assembly position, the through holes can connect to the space within the engagement groove.

[0005] Optionally, the meshing groove is provided with two rollers spaced apart, and there are two wedge surfaces. The two rollers are located on opposite sides of the shift fork and correspond one-to-one with the two wedge surfaces. There are two through holes in a set, and the circumferential distance between the two through holes is greater than the circumferential length of the shift fork.

[0006] Optionally, the housing includes an end face and an annular side face, and the through hole is provided on the end face and / or the annular side face.

[0007] Optionally, the through hole is provided on the end face, in the radial direction of the corner module self-locking device, and the through hole is located within the range of the side wall height of the engagement groove.

[0008] Optionally, the through hole is located on the annular side surface, and in the circumferential direction of the corner module self-locking device, the through hole is located within the height range of the roller.

[0009] Optionally, the bottom wall of the meshing groove further includes a connecting surface disposed between the two wedge surfaces; the inner sidewall of the housing forms an annular inner wall, the roller is located between the wedge surface and the annular inner wall, and the roller and the sidewall of the meshing groove are provided with an elastic reset member.

[0010] Optionally, the corner module self-locking device further includes an input shaft connected to the first transmission disk and an output shaft connected to the second transmission disk, wherein the input shaft is located on the side of the first transmission disk opposite to the second transmission disk; and the output shaft is located on the side of the second transmission disk opposite to the first transmission disk.

[0011] Optionally, the corner module self-locking device further includes a first bearing sleeved on the input shaft and a second bearing sleeved on the output shaft.

[0012] A second aspect of this utility model provides a steering system, including a motor, a reducer, and an angle module self-locking device as described in any of the above optional solutions, wherein the input end of the angle module self-locking device is connected to the motor, and the output end of the angle module self-locking device is connected to the reducer.

[0013] A third aspect of this utility model provides a vehicle that includes the steering system of the above-mentioned optional solution.

[0014] Through the above technical solution, namely the corner module self-locking device provided by this utility model, when assembling the corner module self-locking device as a whole, the second transmission disc can be installed into the housing first, and the second transmission disc can be rotated to the assembly position so that the through hole can connect the space in the meshing groove. Then, the limiting member (such as a positioning pin) is passed through the through hole. The limiting member passing through the through hole will limit the roller located in the meshing groove, so that the roller can be stably located between the wedge surface and the inner side wall of the housing, without changing the relative position with the second transmission disc. At this time, the first transmission disc and the second transmission disc can be assembled, that is, the first transmission disc can be turned... When the fork is inserted into the engagement groove of the second transmission plate, the limiting member can be pushed out from the through hole of the housing during the process of the first transmission plate being installed into the housing. At this time, the rollers are respectively attached to the wedge surface and the inner side wall of the housing, thus completing the overall assembly of the corner module self-locking device. By opening the through hole in the housing, the rollers can be limited relative to the second transmission plate in advance, and the first transmission plate and the second transmission plate can be smoothly assembled. This can reduce the gap between the fork and the roller, thereby reducing the internal free travel of the corner module self-locking device structure of the two-way overrunning clutch, reducing the assembly difficulty, and improving the performance of the two-way overrunning clutch. Attached Figure Description

[0015] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of the corner module self-locking device provided in an embodiment of the present utility model;

[0017] Figure 2 This is a sectional view of the side of the corner module self-locking device provided in an embodiment of the present utility model;

[0018] Figure 3 This is an exploded structural diagram of the corner module self-locking device provided in an embodiment of the present utility model;

[0019] Figure 4 A plan view of the mating structure between the second transmission disc and the housing provided in an embodiment of this utility model;

[0020] Figure 5 This is a cross-sectional view of the first and second transmission discs and the housing mating structure provided in an embodiment of the present utility model, wherein the through hole is shown, indicating an incomplete assembly state;

[0021] Figure 6 This is a cross-sectional view of the first and second transmission discs and their mating structure with the housing provided in an embodiment of the present utility model. The figure shows the assembled state.

[0022] Figure 7 A three-dimensional structural diagram of the second transmission disc and housing mating structure provided in an embodiment of this utility model;

[0023] Figure 8 This is a schematic diagram of the assembly process of the housing provided in this embodiment of the utility model;

[0024] Figure 9 This is a schematic diagram from another perspective of the assembly process of the housing provided in this embodiment of the utility model;

[0025] Figure 10 A schematic diagram of the structure of the first transmission disc and roller provided in an embodiment of this utility model;

[0026] Figure 11 This is a schematic diagram of the housing after assembly, as provided in the embodiment of this utility model.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1. First transmission disc; 110. Shift fork; 120. Input shaft; 130. First bearing;

[0029] 2. Second transmission disc; 210. Engaging groove; 211. Wedge surface; 212. Connecting surface; 220. Output shaft; 230. Second bearing;

[0030] 3. Shell; 301. Through hole; 302. Annular inner wall; 310. End face; 320. Annular side;

[0031] 4. Roller;

[0032] 5. Elastic reset component;

[0033] 6. Limiting components;

[0034] H1, sidewall height; H2, height range;

[0035] 7. End caps. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0037] In related technologies, the wheel-side kingpin steering system of a vehicle typically employs a reverse self-locking function to reduce wheel deviation when turning or subjected to external impacts. The principle of self-locking is achieved by using the angle module self-locking device structure of the two-way overrunning clutch to provide different torques to the wheels on both sides. However, during the assembly of the angle module self-locking device structure of the two-way overrunning clutch, there is often a large gap between the internal shift fork and the cylindrical roller, resulting in a large idle stroke in torque transmission. Furthermore, during external assembly, the relative position of the internal shift fork and the cylindrical roller cannot be directly observed, thus affecting the performance of the two-way overrunning clutch after assembly.

[0038] Based on the aforementioned technical problems, this utility model improves the structure of the self-locking device for the angle module of a bidirectional overrunning clutch, referring to... Figures 1 to 11As shown, in a first aspect, this utility model provides a corner module self-locking device, which includes a housing 3, a first transmission disk 1, and a second transmission disk 2. The housing 3 is provided with at least one set of through holes 301, and the set of through holes consists of two holes. The first transmission disk 1 and the second transmission disk 2 are coaxially disposed within the housing 3. The first transmission disk 1 is provided with an axially protruding fork 110, and the second transmission disk 2 is provided with an engagement groove 210 for the fork 110 to be inserted. The bottom wall of the engagement groove 210 includes a wedge surface 211, and each wedge surface 211 is provided with a roller 4. When the second transmission disk 2 is rotated to the assembly position, the through holes 301 can connect to the space within the engagement groove 210.

[0039] With the above solution, namely the corner module self-locking device provided by this utility model, when assembling the corner module self-locking device as a whole, the second transmission disk 2 can be installed into the housing 3 first, and the second transmission disk 2 can be rotated to the assembly position so that the through hole 301 can connect to the space in the meshing groove 210. Then, the limiting member 6 (such as a positioning pin or other structure) is passed through the through hole 301. The limiting member 6 passing through the through hole 301 will limit the roller 4 located in the meshing groove 210, so that the roller 4 can be stably located between the wedge surface 211 and the inner wall of the housing 3, and will not change its relative position with the second transmission disk 2. At this time, the first transmission disk 1 and the second transmission disk 2 can be assembled, that is, the shift fork 1 of the first transmission disk 1 is assembled. 10 is inserted into the engagement groove 210 of the second transmission disc 2. During the process of the first transmission disc 1 being installed into the housing 3, the limiting member 6 can be pushed out from the through hole 301 of the housing 3. At this time, the roller 4 is respectively attached to the wedge surface 211 and the inner side wall of the housing 3, and the overall assembly of the corner module self-locking device can be completed. By opening the through hole 301 on the housing 3, the roller 4 can be limited relative to the second transmission disc 2 in advance, and the first transmission disc 1 and the second transmission disc 2 can be smoothly assembled. This can reduce the gap between the shift fork 110 and the roller 4, thereby reducing the internal free travel of the corner module self-locking device structure of the bidirectional overrunning clutch, reducing the assembly difficulty, and improving the performance of the bidirectional overrunning clutch.

[0040] It should be noted that, in the above embodiments, the roller 4 is usually attached to the wedge surface 211 and the inner wall of the housing 3 by the elastic action of the elastic reset member 5 (which will be described in detail below) in the meshing groove 210. When assembling the self-locking device of the corner module, it is usually necessary to assemble the inner ring of the first bearing 130 (which will be described in detail below) with the first transmission disk 1, and assemble the outer ring of the first bearing 130 with the end cover 7. Then, assemble the second transmission disk 2 with the inner ring of the second bearing 230 (which will be described in detail below), and assemble the outer ring of the second bearing 230 with the housing 3. Then, one end of the elastic reset member 5 abuts in the meshing groove 210 of the second transmission disk 2, and the other end of the elastic reset member 5 is attached to the roller. Finally, the end cover 7 and the housing 3 are fastened together to complete the assembly, that is, as shown below. Figure 3 and Figure 5 As shown, during this process, under the elastic force of the elastic reset member 5, the relative position of the roller 4 and the second transmission disk 2 is not easy to determine. Furthermore, due to the elastic effect of the elastic reset member 5, the meshing groove 210 cannot provide enough space for the shift fork 110 to be inserted. In addition, since the gap between the shift fork 110 and the roller 4 is extremely small, the assembly precision requirements are also higher. Therefore, by opening a through hole in the housing 3, the limiting member 6 is inserted through the through hole to stop the roller 4, so that after the elastic reset member 5 is compressed, enough space can be provided for the shift fork 110 to be inserted in the meshing groove 210, thereby simplifying the assembly difficulty of the first transmission disk 1 and the second transmission disk 2.

[0041] Furthermore, the number and position of the through holes 301 can be any suitable method. The method of opening through holes 301 can also be applied to any suitable type of overrunning clutch. For example, both one-way overrunning clutches and two-way overrunning clutches can be assembled by opening through holes 301 as described above. The position of the through holes 301 only needs to satisfy the requirement that the roller 4 can be limited when the limiting member 6 passes through the through hole 301.

[0042] For example, in an embodiment of this utility model, reference can be made to Figures 3 to 11 As shown, two rollers 4 are spaced apart in the meshing groove 210, and there are two wedge surfaces 211. The two rollers 4 are located on opposite sides of the shift fork 110 and correspond one-to-one with the two wedge surfaces 211. There are also two through holes 301, and the circumferential distance between the two through holes 301 is greater than the circumferential length of the shift fork 110.

[0043] Through the above scheme, the two rollers 4 can realize the bidirectional rotation function of the bidirectional overrunning clutch (which will be described in detail below). The distance between the two through holes 301 is greater than the circumferential length of the shift fork 110. When the two limiting members 6 are inserted into the two through holes 301 respectively, they will not interfere with the shift fork 110. That is, the distance between the two through holes 301 can meet the requirement of stable insertion of the shift fork 110. Furthermore, when the limiting members 6 are inserted into the two through holes 301, they can also stably limit the two rollers 4, further improving the convenience of assembly.

[0044] Among them, the limiting component 6 can be as follows: Figures 7 to 11 The locating pin in the middle can be inserted into the through hole 301 to stop the roller 4 through the outer wall of the locating pin, thereby limiting the roller 4.

[0045] In some implementations, reference Figure 1 , Figure 3 , Figure 4 , Figure 7 , Figure 8 , Figure 9 , Figure 11 As shown, the housing 3 includes an end face 310 and an annular side face 320, and a through hole 301 is provided on the end face 310 and / or the annular side face 320.

[0046] With the above solution, the position of the through hole 301 can be any suitable position, that is, whether it is set on the end face 310 or the annular side 320, as long as it can satisfy the requirement that the limiting member 6 can pass through the through hole 301 and be inserted into the meshing groove 210 to form a limiting stop for the roller 4, thereby further improving the convenience of assembly.

[0047] It should be noted that when the through hole 301 is provided on the end face 310 of the housing 3, it is necessary to ensure that, in the radial direction of the corner module self-locking device, the through hole 301 is within the range of the side wall height H1 of the engagement groove 210, i.e. Figures 4 to 6 As shown, within this range, after the limiting member 6 passes through the through hole 301, the part located in the meshing groove 210 can fit against the side wall of the roller 4. At this time, the limiting member 6 and the roller 4 can be relatively parallel to each other, so as to stably limit the roller 4, further improve the convenience of assembly, and increase the compact assembly effect of the whole device, saving space.

[0048] When the through hole 301 is located on the annular side 320 of the housing 3, it is necessary to ensure that, in the circumferential direction of the corner module self-locking device, the through hole 301 is located within the height range H2 of the roller 4, i.e. Figure 10As shown, within this range, after the limiting member 6 passes through the through hole 301 located on the annular side 320 of the housing 3, the part located in the meshing groove 210 can fit against the side wall of the roller 4. At this time, the limiting member 6 and the roller 4 can be relatively perpendicular to each other to stably limit the roller 4, further improving the convenience of assembly and increasing the compact assembly effect of the entire device, saving space.

[0049] In some implementations, reference Figure 4 , Figure 5 and Figure 6 As shown, the bottom wall of the meshing groove 210 also includes a connecting surface 212 disposed between the two wedge surfaces 211; the inner sidewall of the housing 3 forms an annular inner wall 302, the roller 4 is located between the wedge surface 211 and the annular inner wall 302, and the roller 4 and the sidewall of the meshing groove 210 are provided with an elastic reset member 5.

[0050] In the above manner, the fork 110 can be inserted between the connecting surface 212 and the annular inner wall 302, and the elastic reset member 5 can provide elastic restoring force for the roller 4 to realize the bidirectional rotation of the bidirectional overrunning clutch. In this utility model, the elastic reset member 5 can be a spring with its two ends connected to the second transmission disc 2 and the roller 4 respectively, which further improves the convenience of assembly and increases the compact assembly effect of the whole device, saving space.

[0051] In some implementations, reference Figure 2 As shown, the corner module self-locking device also includes an input shaft 120 connected to the first transmission disk 1 and an output shaft 220 connected to the second transmission disk 2. The input shaft 120 is located on the side of the first transmission disk 1 away from the second transmission disk 2; the output shaft 220 is located on the side of the second transmission disk 2 away from the first transmission disk 1.

[0052] In the above manner, the input shaft 120 can be used to connect the motor, and the output shaft 220 can be used to connect the reducer. By setting the input shaft 120 and the output shaft 220, the self-locking device of the corner module can be used to connect the upper and lower parts, and the vehicle can be steered through the self-locking device of the corner module. That is to say, the power output by the motor can be transmitted to the input shaft 120, the input shaft 120 drives the first transmission disk 1 to rotate, and drives the second transmission disk 2 and the output shaft 220 to rotate, thereby transmitting the power to the reducer connected to the output shaft 220. The reducer can reduce the power and increase the torque before transmitting it to the steering knuckle of the vehicle, and finally drive the wheels to achieve the steering function.

[0053] In some implementations, reference Figure 2 and Figure 3 As shown, the corner module self-locking device also includes a first bearing 130 sleeved on the input shaft 120 and a second bearing 230 sleeved on the output shaft 220.

[0054] In the above manner, the first bearing 130 and the second bearing 230 can realize the function of enabling the first transmission disk 1 and the second transmission disk 2 to rotate relative to the housing 3, that is, from... Figure 2 It is clearly seen that the inner ring of the first bearing 130 is attached to the input shaft 120, and the outer ring is attached to the housing 3; the inner ring of the second bearing 230 is attached to the output shaft 220, and the outer ring is attached to the housing 3. In this connection configuration, the first transmission disc 1 and the second transmission disc 2 can rotate relative to the housing 3 via the first bearing 130 and the second bearing 230, respectively, to transmit the power output from the motor to the reducer, and then to the steering knuckle and wheels, thus achieving the steering function of the wheels.

[0055] This utility model exemplarily describes the specific assembly process of the corner module self-locking device, which may include, for example, the following steps.

[0056] The housing 3 is fixed in its initial position. The outer ring of the second bearing 230 is connected to the housing 3, and the inner ring of the second bearing 230 is connected to the second transmission disk 2, so that the second transmission disk 2 is placed inside the housing 3.

[0057] The outer ring of the first bearing 130 is connected to the end cover 7, and the inner ring of the first bearing 130 is connected to the first transmission disk 1. The first transmission disk 1 and the end cover 7 are then assembled.

[0058] One end of the elastic reset member 5 is abutted against the meshing groove 210 of the second transmission disc 2, and the other end is attached to the roller 4.

[0059] Rotate the second transmission disc 2 to the assembly position and move the roller 4 to compress the elastic reset member 5 until the through hole 301 can connect to the internal space of the housing 3. Then, the limiting member 6 passes through the through hole 301 of the housing 3 and is partially located in the engagement groove 210. At this time, the limiting member 6 will stop the roller 4 and insert the fork 110 of the first transmission disc 1 into the engagement groove 210.

[0060] The end cap 7 and the housing 3 are fastened together to drive the first transmission disc 1 and the second transmission disc 2 to fasten together.

[0061] During the engagement of the first transmission disc 1 and the second transmission disc 2, the first transmission disc 1 will adhere to one end of the limiting member 6 and gradually push the limiting member 6 out of the through hole 301, that is, from... Figures 10 to 11 The installation is completed after the first transmission disc 1 and the second transmission disc 2 are fully engaged. At this time, the limiting member 6 can be removed from the through hole 301 of the housing 3. The roller 4 is no longer limited by the limiting member 6. Under the elastic force of the elastic reset member 5, the roller 4 is pushed and locked between the wedge surface 211 and the annular inner wall 302 of the housing 3, thus completing the assembly.

[0062] In a second aspect, this utility model provides a steering system comprising a motor, a reducer, a steering knuckle, wheels, and the corner module self-locking device described in the above embodiments, and possessing all the beneficial effects of the above embodiments. In this steering system, the output end of the motor can be connected to the input end of the corner module self-locking device, i.e., connected to the first transmission disc 1; the input end of the reducer can be connected to the output end of the corner module self-locking device, i.e., the second transmission disc 2; the output end of the reducer can be connected to the steering knuckle; and the steering knuckle can be connected to the wheels. Through this connection method, power can be sequentially transmitted from the motor, the corner module self-locking device, the reducer, the steering knuckle, and the wheels to achieve wheel steering.

[0063] A third aspect of this utility model provides a vehicle that includes the steering system described in the above specific embodiments and has all the beneficial effects described in the above embodiments. The vehicle may be a pure electric vehicle, a plug-in hybrid electric vehicle, or a range-extended vehicle in the field of new energy vehicles, or it may be a fuel vehicle. This utility model does not specifically limit the types of vehicles.

[0064] Furthermore, the aforementioned corner module self-locking device can also realize the function of power transmission via a bidirectional overrunning clutch. The present invention exemplarily describes the working process of the corner module self-locking device, which may include the following steps.

[0065] After assembling the corner module self-locking device, the input shaft 120 of the corner module self-locking device can be connected to the output end of the motor, and the output shaft 220 of the corner module self-locking device can be connected to the input end of the reducer. The motor drives the input shaft 120 to rotate clockwise, and the input shaft 120 drives the first transmission disc 1 to rotate clockwise. At this time, Figure 6 In China, with Figure 6 Taking the two rollers 4 and two elastic reset members 5 at the top of the diagram as an example, when the first transmission disk 1 rotates clockwise, it will drive the shift fork 110 to rotate clockwise as well. At this time, the shift fork contacts the roller 4 on the right side, and pushes the roller 4 on the right side as the shift fork 110 rotates. The elastic reset member 5 on the right side is compressed, and the roller 4 on the right side is no longer held by the wedge surface 211 and the annular inner wall 302. The first transmission disk 1 also rotates clockwise.

[0066] As the first transmission disc 1 rotates clockwise, the left roller 4 changes its relative position to the first transmission disc 1. The left roller 4 also tends to rotate counterclockwise relative to the first transmission disc 1. When the left roller 4 has the tendency to rotate counterclockwise, it is no longer held by the wedge surface 211 and the annular inner wall 302. That is, the left roller 4 is released from the locked position and moves toward the unlocked position, and follows the first transmission disc 1 to rotate clockwise as a whole. In addition, during the process of the left roller 4 following the first transmission disc 1 to rotate clockwise, it will also have a slight compression on the left elastic reset member 5.

[0067] When the shift fork 110 pushes the right roller 4, the first transmission disc 1 can drive the second transmission disc 2 to rotate clockwise, and transmit the power to the reducer through the output shaft 220. The reducer reduces the rotational power and increases the torque before transmitting it to the vehicle's steering knuckle, and finally transmits the power to the vehicle's wheels to achieve wheel steering.

[0068] It should be noted that the above steps are only an exemplary description of the first transmission disk 1 rotating clockwise. When the first transmission disk 1 rotates counterclockwise, the above power transmission can also be achieved. The only difference is that the direction is opposite. Since those skilled in the art can clearly understand the above power transmission process, this utility model will not elaborate on the power transmission route when the first transmission disk 1 rotates counterclockwise.

[0069] When the wheel is impacted and tends to deflect, the wheel transmits reverse power back to the steering knuckle, which then transmits power to the reducer. The reducer then transmits power back to the output shaft 220 of the corner module self-locking device. When the output shaft 220 tends to drive the second transmission disc 2 to rotate counterclockwise, due to... Figure 6 The roller 4 on the left side is held in place by the wedge surface 211 and the annular inner wall 302, so the second transmission disc 2 can no longer rotate. At this time, the power can no longer be transmitted back to the first transmission disc 1 through the second transmission disc 2, thus maintaining the vehicle's steering angle.

[0070] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and all such modifications and variations fall within the scope of protection claimed by the present invention.

Claims

1. A corner module self-locking device, characterized in that, include: The housing (3) is provided with at least one set of through holes (301); The first transmission disc (1) and the second transmission disc (2) are coaxially disposed in the housing (3). The first transmission disc (1) is provided with a fork (110) protruding along the axial direction. The second transmission disc (2) is provided with a meshing groove (210) for the fork (110) to be inserted. The bottom wall of the meshing groove (210) includes a wedge surface (211), and each wedge surface (211) is provided with a roller (4). When the second transmission disc (2) is rotated to the assembly position, the through hole (301) can connect to the space inside the meshing groove (210).

2. The corner module self-locking device according to claim 1, characterized in that, The meshing groove (210) is provided with two rollers (4) spaced apart, and there are two wedge surfaces (211). The two rollers (4) are located on opposite sides of the shift fork (110) and correspond one-to-one with the two wedge surfaces (211). The number of the through holes (301) in a set is two, and the circumferential distance between the two through holes (301) is greater than the circumferential length of the fork (110).

3. The corner module self-locking device according to claim 2, characterized in that, The housing (3) includes an end face (310) and an annular side face (320), and the through hole (301) is provided on the end face (310) and / or the annular side face (320).

4. The corner module self-locking device according to claim 3, characterized in that, The through hole (301) is provided on the end face (310) and is located in the radial direction of the corner module self-locking device. The through hole is within the range of the side wall height (H1) of the engagement groove (210).

5. The corner module self-locking device according to claim 3, characterized in that, The through hole (301) is provided on the annular side (320). In the circumferential direction of the corner module self-locking device, the through hole (301) is located within the height range (H2) of the roller (4).

6. The corner module self-locking device according to claim 2, characterized in that, The bottom wall of the meshing groove (210) also includes a connecting surface (212) disposed between the two wedge surfaces (211); The inner wall of the housing (3) forms an annular inner wall (302), the roller (4) is located between the wedge surface (211) and the annular inner wall (302), and the roller (4) is provided with an elastic reset member (5) on the side wall of the meshing groove (210).

7. The corner module self-locking device according to claim 1, characterized in that, The corner module self-locking device further includes an input shaft (120) connected to the first transmission disk (1) and an output shaft (220) connected to the second transmission disk (2). The input shaft (120) is located on the side of the first transmission disk (1) away from the second transmission disk (2); the output shaft (220) is located on the side of the second transmission disk (2) away from the first transmission disk (1).

8. The corner module self-locking device according to claim 7, characterized in that, The corner module self-locking device also includes a first bearing (130) sleeved on the input shaft (120) and a second bearing (230) sleeved on the output shaft (220).

9. A steering system, characterized in that, It includes a motor, a reducer, and a corner module self-locking device as described in any one of claims 1-8, wherein the input end of the corner module self-locking device is connected to the motor, and the output end of the corner module self-locking device is connected to the reducer.

10. A vehicle, characterized in that, Includes the steering system as described in claim 9.

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