Steer-by-wire mechanical angle limiting device
By designing a line-controlled steering mechanical angle limit device including a lower steering mandrel, a housing, annular and subtraction ring and a buffer ring, the problems of poor driving experience, insufficient safety and stability in the prior art are solved, and the problem of poor driving experience, insufficient safety and stability is achieved. Better driving experience and safety.
Patent Information
- Application Number
- CN202411747075.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-02
- Publication Date
- 2025-02-14
AI Technical Summary
The existing wire-controlled steering mechanical angle limiting device leads to poor driving experience, and safety and stability need to be improved.
A mechanical angle limiting device including a lower steering mandrel, a housing, a first addition and subtraction ring, a limiting groove and a buffer ring are designed. The buffering ring and the edge of the limiting groove are contacted by driving the lower steering mandrel to achieve an angle Lock.
Improves the driving experience, enhances the safety and stability of driving, and allows drivers to feel the same limit touch of traditional cars.
Smart Images
Figure CN119428827A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of automobile steering, and 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 the real road feel and provide the driver with accurate steering feedback. However, the existing mechanical angle steering limiter provides a poor driving experience for the driver, and the driving safety and stability need to be improved. Summary of the invention
[0004] The purpose of the present invention 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 invention is achieved through the following technical scheme: A mechanical angle limit device for wire-controlled steering, comprising a lower steering spindle and a shell sleeved on the lower steering spindle, the lower steering spindle is coaxially connected to the steering wheel, the end of the lower steering spindle away from the shell is fixedly connected with 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 spindle, a buffer ring is provided at 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 spindle 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 present invention 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 spindle, 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 spindle, 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 limiting groove.
[0008] By adopting the above technical solution, when the steering wheel is turned, the lower steering core shaft rotates, and 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 to play 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 via 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 present invention 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 spindle.
[0013] By adopting the above technical solution, mutual influence between two adjacent bearings during movement can be prevented.
[0014] The present invention is further configured as follows: a locking nut is threadedly connected to one end of the lower steering spindle close to the first adding and subtracting ring, and the locking nut is in contact with one 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 plus / minus ring, the second plus / minus ring, the third plus / minus ring and the fourth plus / minus ring.
[0016] The beneficial effects of the present invention are:
[0017] 1. The present invention limits the first plus and minus ring, the second plus and minus ring, the third plus and minus ring and the fourth plus and minus ring on the lower steering core shaft through a locking nut, and the structural design is compact. Under the drive of the lower steering core shaft, the first plus and minus ring rotates to drive the second plus and minus ring to rotate, the second plus and minus ring rotates to drive the third plus and minus ring to rotate, and the third plus and minus ring rotates to drive the fourth plus and minus ring to rotate, until the limit rod on the fourth plus and minus 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 to play an angle locking role.
[0018] 2. The present invention is provided with a retaining ring between the two bearings, and a buffer ring is provided on the limiting rod of the fourth adding and subtracting ring, and is designed with a flexible structure, which can play a role in noise reduction during the limiting process.
[0019] 3. The present invention 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 creative work.
[0021] Figure 1 It is a structural schematic diagram of the present invention assembled on a steering-by-wire road feel simulator.
[0022] Figure 2 It is a schematic diagram of the structure of the present invention.
[0023] Figure 3 yes Figure 2 A schematic diagram of the enlarged structure in the middle.
[0024] Figure 4 It is a schematic diagram of the cross-sectional structure of the present invention.
[0025] Figure 5 yes Figure 4 Enlarged schematic diagram of the structure at point B in the middle.
[0026] In the figure, 1, lower steering spindle; 2, housing; 21, limit groove; 3, first plus and minus ring; 4, second plus and minus ring; 5, third plus and minus ring; 6, fourth plus and minus ring; 7, limit rod; 8, fixing piece; 9, buffer ring; 10, bearing; 11, retaining ring; 12, fixing key; 13, locking nut. DETAILED DESCRIPTION
[0027] The technical solution of the present invention will be clearly and completely described below in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are 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 spindle 1 and a shell 2 sleeved on the lower steering spindle 1, the lower steering spindle 1 is coaxially connected to the steering wheel, the end of the lower steering spindle 1 away from the shell 2 is fixedly connected with a first plus-minus ring 3 along the circumferential direction, a limiting groove 21 is provided on the shell 2, and a limiting assembly is provided on the lower steering spindle 1, and a buffer ring 9 is provided at the end of the limiting assembly away from the first plus-minus ring 3, and the buffer ring 9 is located in the limiting groove 21, and the lower steering spindle 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 plus-minus ring 4, a third plus-minus ring 5 and a fourth plus-minus ring 6, the first plus-minus ring 3, the second plus-minus ring 4, the third plus-minus ring 5 and the fourth plus-minus ring The reducing rings 6 are arranged in sequence along the axial direction of the lower steering spindle 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 with the limiting rod 7, and the limiting rod 7 is arranged in parallel with the lower steering spindle 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, and 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 spindle 1 rotates, and under the drive of the lower steering spindle 1, the first plus and minus ring 3 rotates to drive the second plus and minus ring 4 to rotate, and the second plus and minus ring 4 rotates to drive the third plus and minus ring 5 to rotate, and the third plus and minus ring 5 rotates to drive the fourth plus and minus ring 6 to rotate, until the limit rod 7 on the fourth plus and minus ring 6 is about to contact the edge of the limit groove 21, and the buffer ring 9 first contacts the edge of the limit groove 21 to play a buffering role. At this time, the lower steering spindle 1 stops rotating and plays an angle locking role. Similarly, the lower steering spindle 1 rotates in the opposite direction. Among them, the plus and minus rings can be increased or decreased as needed to control the size of the limit angle, and it is necessary to ensure that the limit rod 7 on the plus and minus ring close to the shell 2 is located in the limit 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 the bearing 10 .
[0031] A fixing key 12 is fixedly connected to the lower steering shaft 1 along the axial direction, and the first adding and subtracting ring 3 is fixedly connected to the lower steering shaft 1 through the fixing key 12, so that when the lower steering 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 spindle 1 to prevent the two adjacent bearings 10 from influencing each other during movement.
[0033] A locking nut 13 is threadedly connected to one 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 limit device for wire-controlled steering, characterized in that: The invention comprises a lower steering spindle (1) and a shell (2) sleeved on the lower steering spindle (1); the lower steering spindle (1) is coaxially connected to a steering wheel; one end of the lower steering spindle (1) away from the shell (2) is fixedly connected to a first plus / minus 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 spindle (1); one end of the limiting assembly away from the first plus / minus ring (3) is provided with a buffer ring (9); the buffer ring (9) is located in the limiting groove (21); the lower steering spindle (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 wire-controlled steering 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 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 A fixing part (8) is provided on one end of the first adding and subtracting ring (3) 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 limit device for wire-controlled steering 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 a bearing (10).
4. The mechanical angle limit device for wire-controlled steering according to claim 3, characterized in that: A fixing 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 fixing key (12).
5. The mechanical angle limit device for wire-controlled steering 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 spindle (1).
6. The mechanical angle limit device for wire-controlled steering according to claim 1, characterized in that: One end of the lower steering spindle (1) close to the first plus / minus ring (3) is threadedly connected with a locking nut (13), and the locking nut (13) is in contact with one end of the first plus / minus ring (3) away from the second plus / minus ring (4).