Steer-by-wire mechanical angle limiting device
By designing a wire-controlled steering mechanical angle limit device and utilizing the coordination of the adding and subtracting ring and the buffer ring, the problem of poor driving experience for the driver is solved, achieving higher driving safety and stability.
Patent Information
- Application Number
- CN202422966411.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-02
- Publication Date
- 2025-09-19
- Estimated Expiration
- 2034-12-02
AI Technical Summary
The existing mechanical angle limit device of wire-controlled steering results in a poor driving experience for the driver, and driving safety and stability need to be improved.
A mechanical angle limiter for wire-controlled steering is designed, including a lower steering spindle, a housing, a limit slot, and a limit assembly. The plus-minus ring structure and the buffer ring of the limit assembly cooperate to achieve angle locking and buffering effects, thereby improving the flexibility and accuracy of the limit tactile feel.
It improves the driver's driving experience, enhances driving safety and stability, and allows the driver to have the same limit touch as in traditional cars in cars equipped with the SBW system.
Smart Images
Figure CN223355684U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of automobile steering, in particular to a mechanical angle limiting device for wire-controlled steering. Background Art
[0002] The steering system of a car has gone through the development process of mechanical steering system, hydraulic power steering system, electronically controlled hydraulic power steering system, and electric power steering system. With the development of wire control technology, wire control steering technology has gradually appeared in the steering system of the car.
[0003] The steer-by-wire system is an innovative electronic steering system that can simulate real road feel and provide the driver with precise steering feedback. However, the existing mechanical angle steering limiter device does not provide a good driving experience for the driver, and driving safety and stability need to be improved. Utility Model Content
[0004] The purpose of the utility model is to provide a mechanical angle limit device for wire-controlled steering, which can improve the driving experience and has the effect of improving driving safety and stability.
[0005] The above-mentioned technical purpose of the present utility model is achieved through the following technical solutions: A mechanical angle limit device for wire-controlled steering, comprising a lower steering core shaft and a shell sleeved on the lower steering core shaft, the lower steering core shaft is coaxially connected to the steering wheel, the end of the lower steering core shaft away from the shell is fixedly connected to a first adding and subtracting ring along the circumferential direction, a limiting groove is provided on the shell, a limiting assembly is provided on the lower steering core shaft, a buffer ring is provided on the end of the limiting assembly away from the first adding and subtracting ring, the buffer ring is located in the limiting groove, and the lower steering core shaft rotates to control the buffer ring to contact the edge of the limiting groove for limiting.
[0006] By adopting the above technical solution, when the steering wheel is turned, the lower steering core shaft rotates. Under the drive of the lower steering core shaft, the first plus and minus ring rotates to control the movement of the limit assembly, so that the buffer ring first contacts the edge of the limit groove to play a buffering role. At this time, the lower steering core shaft stops rotating, which plays an angle locking role.
[0007] The utility model is further configured as follows: the limit assembly includes a second adding and subtracting ring, a third adding and subtracting ring and a fourth adding and subtracting ring, the first adding and subtracting ring, the second adding and subtracting ring, the third adding and subtracting ring and the fourth adding and subtracting ring are arranged successively in sequence along the axial direction of the lower steering core shaft, the first adding and subtracting ring, the second adding and subtracting ring, the third adding and subtracting ring and the fourth adding and subtracting ring are all fixedly connected with a limit rod, the limit rod is arranged parallel to the lower steering core shaft, the second adding and subtracting ring, the third adding and subtracting ring and the fourth adding and subtracting ring are all provided with a fixing piece at one end away from the limit rod, the limit rod of the first adding and subtracting ring is embedded in the fixing piece of the second adding and subtracting ring, the limit rod of the second adding and subtracting ring is embedded in the fixing piece of the third adding and subtracting ring, the limit rod of the third adding and subtracting ring is embedded in the fixing piece of the fourth adding and subtracting ring, a buffer ring is fixedly connected to the limit rod of the fourth adding and subtracting ring, and the limit rod of the fourth adding and subtracting ring is located in the limit groove.
[0008] By adopting the above technical solution, when the steering wheel is turned, the lower steering core shaft rotates. Under the drive of the lower steering core shaft, the first adding and subtracting ring rotates to drive the second adding and subtracting ring to rotate, the second adding and subtracting ring rotates to drive the third adding and subtracting ring to rotate, and the third adding and subtracting ring rotates to drive the fourth adding and subtracting ring to rotate, until the limit rod on the fourth adding and subtracting ring is about to contact the edge of the limit groove, and the buffer ring first contacts the edge of the limit groove to play a buffering role. At this time, the lower steering core shaft stops rotating, which plays an angle locking role. Similarly, the lower steering core shaft rotates in the opposite direction.
[0009] The present invention is further configured as follows: the second adding and subtracting ring, the third adding and subtracting ring and the fourth adding and subtracting ring are all rotatably connected to the lower steering core shaft through bearings.
[0010] The present invention is further configured as follows: a fixing key is fixedly connected to the lower steering core shaft along the axial direction, and the first adding and subtracting ring is fixedly connected to the lower steering core shaft via the fixing key.
[0011] By adopting the above technical solution, when the lower steering core shaft rotates, the first adding and subtracting ring can rotate synchronously.
[0012] The utility model is further configured as follows: a retaining ring is provided between two adjacent bearings, and the retaining ring is fixedly connected to the lower steering core shaft.
[0013] By adopting the above technical solution, the mutual influence between two adjacent bearings during movement is prevented.
[0014] The utility model is further configured as follows: a locking nut is threadedly connected to one end of the lower steering core shaft close to the first adding and subtracting ring, and the locking nut is in contact with an end of the first adding and subtracting ring away from the second adding and subtracting ring.
[0015] By adopting the above technical solution, the locking nut limits the first adding and subtracting ring, the second adding and subtracting ring, the third adding and subtracting ring and the fourth adding and subtracting ring.
[0016] The beneficial effects of the utility model are:
[0017] 1. The utility model limits the first adding and subtracting ring, the second adding and subtracting ring, the third adding and subtracting ring and the fourth adding and subtracting ring on the lower steering core shaft through a locking nut. The structural design is compact. Under the drive of the lower steering core shaft, the first adding and subtracting ring rotates to drive the second adding and subtracting ring to rotate, the second adding and subtracting ring rotates to drive the third adding and subtracting ring to rotate, and the third adding and subtracting ring rotates to drive the fourth adding and subtracting ring to rotate until the limit rod on the fourth adding and subtracting ring is about to contact the edge of the limit groove, and the buffer ring first contacts the edge of the limit groove to play a buffering role. At this time, the lower steering core shaft stops rotating, playing an angle locking role.
[0018] 2. The utility model is provided with a retaining ring between the two bearings and a buffer ring on the limiting rod of the fourth adding and subtracting ring. The design has a flexible structure, which can reduce noise during the limiting process.
[0019] 3. The utility model can enhance the driver's driving experience, allowing the driver to have the same limit touch feeling as a traditional car in a car equipped with the SBW system, thereby improving driving safety and stability. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0021] Figure 1 This is a structural diagram of the utility model assembled on a steer-by-wire road feel simulator.
[0022] Figure 2 It is a schematic structural diagram of the utility model.
[0023] Figure 3 yes Figure 2 A magnified schematic diagram of the structure in the middle.
[0024] Figure 4 It is a schematic diagram of the cross-sectional structure of the utility model.
[0025] Figure 5 yes Figure 4 A magnified schematic diagram of the structure at point B in the middle.
[0026] In the figure, 1. lower steering shaft; 2. housing; 21. limiting groove; 3. first adding and subtracting ring; 4. second adding and subtracting ring; 5. third adding and subtracting ring; 6. fourth adding and subtracting ring; 7. limiting rod; 8. fixing part; 9. buffer ring; 10. bearing; 11. retaining ring; 12. fixing key; 13. locking nut. DETAILED DESCRIPTION
[0027] The following will clearly and completely describe the technical solutions of the present invention in conjunction with specific embodiments. Obviously, the embodiments described are only some of the embodiments of the present invention, and not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are also within the scope of protection of the present invention.
[0028] Example: See Figure 1-5 , a mechanical angle limit device for wire-controlled steering includes a lower steering core shaft 1 and a shell 2 sleeved on the lower steering core shaft 1, the lower steering core shaft 1 is coaxially connected to the steering wheel, the end of the lower steering core shaft 1 away from the shell 2 is fixedly connected with a first adding and subtracting ring 3 in the circumferential direction, a limiting groove 21 is provided on the shell 2, and a limiting assembly is provided on the lower steering core shaft 1, and a buffer ring 9 is provided at the end of the limiting assembly away from the first adding and subtracting ring 3, the buffer ring 9 is located in the limiting groove 21, and the lower steering core shaft 1 rotates to control the buffer ring 9 to contact the edge of the limiting groove 21 to limit the position; the limiting assembly includes a second adding and subtracting ring 4, a third adding and subtracting ring 5 and a fourth adding and subtracting ring 6, the first adding and subtracting ring 3, the second adding and subtracting ring 4, the third adding and subtracting ring 5 and the fourth adding and subtracting ring The reducing rings 6 are arranged in sequence along the axial direction of the lower steering core shaft 1. The first adding and subtracting ring 3, the second adding and subtracting ring 4, the third adding and subtracting ring 5 and the fourth adding and subtracting ring 6 are all fixedly connected to the limiting rod 7, and the limiting rod 7 is arranged parallel to the lower steering core shaft 1. The second adding and subtracting ring 4, the third adding and subtracting ring 5 and the fourth adding and subtracting ring 6 are all provided with a fixing part 8 at one end away from the limiting rod 7. The limiting rod 7 of the first adding and subtracting ring 3 is embedded in the fixing part 8 of the second adding and subtracting ring 4, the limiting rod 7 of the second adding and subtracting ring 4 is embedded in the fixing part 8 of the third adding and subtracting ring 5, the limiting rod 7 of the third adding and subtracting ring 5 is embedded in the fixing part 8 of the fourth adding and subtracting ring 6, and a buffer ring 9 is fixedly connected to the limiting rod 7 of the fourth adding and subtracting ring 6. The limiting rod 7 of the fourth adding and subtracting ring 6 is located in the limiting groove 21.
[0029] Specifically, when the steering wheel is turned, the lower steering core shaft 1 rotates. Driven by the lower steering core shaft 1, the first adding and subtracting ring 3 rotates to drive the second adding and subtracting ring 4 to rotate. The second adding and subtracting ring 4 rotates to drive the third adding and subtracting ring 5 to rotate. The third adding and subtracting ring 5 rotates to drive the fourth adding and subtracting ring 6 to rotate until the limiting rod 7 on the fourth adding and subtracting ring 6 is about to contact the edge of the limiting groove 21. The buffer ring 9 first contacts the edge of the limiting groove 21 to act as a buffer. At this time, the lower steering core shaft 1 stops rotating and acts as an angle locking function. Similarly, the lower steering core shaft 1 rotates in the opposite direction. Among them, the adding and subtracting rings can be increased or decreased as needed to control the size of the limiting angle. It is necessary to ensure that the limiting rod 7 on the adding and subtracting ring close to the shell 2 is located in the limiting groove 21.
[0030] Furthermore, the second adding and subtracting ring 4 , the third adding and subtracting ring 5 and the fourth adding and subtracting ring 6 are all rotatably connected to the lower steering core shaft 1 through bearings 10 .
[0031] A fixed key 12 is fixedly connected to the lower steering core shaft 1 along the axial direction, and the first adding and subtracting ring 3 is fixedly connected to the lower steering core shaft 1 through the fixed key 12, so that when the lower steering core shaft 1 rotates, the first adding and subtracting ring 3 can rotate synchronously.
[0032] A retaining ring 11 is provided between two adjacent bearings 10 , and the retaining ring 11 is fixedly connected to the lower steering core shaft 1 to prevent the two adjacent bearings 10 from affecting each other during movement.
[0033] A locking nut 13 is threadedly connected to the end of the lower steering shaft 1 close to the first adding and subtracting ring 3, and the locking nut 13 contacts the end of the first adding and subtracting ring 3 away from the second adding and subtracting ring 4. The locking nut 13 limits the first adding and subtracting ring 3, the second adding and subtracting ring 4, the third adding and subtracting ring 5 and the fourth adding and subtracting ring 6.
Claims
1. A mechanical angle limiter for a wire-controlled steering system, characterized in that: The invention comprises a lower steering core shaft (1) and a shell (2) sleeved on the lower steering core shaft (1); the lower steering core shaft (1) is coaxially connected to the steering wheel; one end of the lower steering core shaft (1) away from the shell (2) is fixedly connected to a first adding and subtracting ring (3) along the circumferential direction; a limiting groove (21) is provided on the shell (2); a limiting assembly is provided on the lower steering core shaft (1); one end of the limiting assembly away from the first adding and subtracting ring (3) is provided with a buffer ring (9); the buffer ring (9) is located in the limiting groove (21); the lower steering core shaft (1) rotates to control the buffer ring (9) to contact the edge of the limiting groove (21) for limiting.
2. The mechanical angle limit device for steer-by-wire according to claim 1, characterized in that: The limiting assembly comprises a second adding and subtracting ring (4), a third adding and subtracting ring (5) and a fourth adding and subtracting ring (6); the first adding and subtracting ring (3), the second adding and subtracting ring (4), the third adding and subtracting ring (5) and the fourth adding and subtracting ring (6) are arranged in sequence along the axial direction of the lower steering core shaft (1); the first adding and subtracting ring (3), the second adding and subtracting ring (4), the third adding and subtracting ring (5) and the fourth adding and subtracting ring (6) are all fixedly connected to a limiting rod (7); the limiting rod (7) is arranged in parallel with the lower steering core shaft (1); the second adding and subtracting ring (4), the third adding and subtracting ring (5) and the fourth adding and subtracting ring (6) is provided with a fixing part (8) at one end away from the limiting rod (7), the limiting rod (7) of the first adding and subtracting ring (3) is embedded in the fixing part (8) of the second adding and subtracting ring (4), the limiting rod (7) of the second adding and subtracting ring (4) is embedded in the fixing part (8) of the third adding and subtracting ring (5), the limiting rod (7) of the third adding and subtracting ring (5) is embedded in the fixing part (8) of the fourth adding and subtracting ring (6), a buffer ring (9) is fixedly connected to the limiting rod (7) of the fourth adding and subtracting ring (6), and the limiting rod (7) of the fourth adding and subtracting ring (6) is located in the limiting groove (21).
3. The mechanical angle limiter for steer-by-wire according to claim 2, characterized in that: The second adding and subtracting ring (4), the third adding and subtracting ring (5) and the fourth adding and subtracting ring (6) are all rotatably connected to the lower steering core shaft (1) via bearings (10).
4. The mechanical angle limit device for steer-by-wire according to claim 3, characterized in that: A fixed key (12) is fixedly connected to the lower steering core shaft (1) along the axial direction, and the first adding and subtracting ring (3) is fixedly connected to the lower steering core shaft (1) via the fixed key (12).
5. The mechanical angle limit device for steer-by-wire according to claim 3, characterized in that: A retaining ring (11) is provided between two adjacent bearings (10), and the retaining ring (11) is fixedly connected to the lower steering core shaft (1).
6. The mechanical angle limiter for steer-by-wire according to claim 1, characterized in that: One end of the lower steering core shaft (1) close to the first adding and subtracting ring (3) is threadedly connected to a locking nut (13), and the locking nut (13) is in contact with one end of the first adding and subtracting ring (3) away from the second adding and subtracting ring (4).