Angle limiting mechanism of steer-by-wire hand feeling simulator
By designing a coordinated structure of large, pinion, limit block and stop in the online control steering system, the problem of steering wheel rotation angle exceeding the soft limit is solved, and effective limiting of steering wheel angle and improving safety is achieved.
Patent Information
- Application Number
- CN202421931697.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-09
- Publication Date
- 2025-05-02
- Estimated Expiration
- 2034-08-09
AI Technical Summary
When the software limit fails or the steering wheel torque is too large, the steering wheel rotation angle can easily cause the steering wheel to exceed the soft limit angle, causing excessive steering and increasing safety hazards.
A linear steering feel simulator angle limiting mechanism is designed to limit the rotation angle of the steering wheel through the synergy between large and pinion gears and limit blocks and stops, avoid infinite rotation, and reduce the impact sound at the limit position through the buffer sleeve.
It realizes effective limits on the steering wheel rotation angle, prevents excessive steering, improves system safety, and saves space through compact structural arrangement.
Smart Images
Figure CN222820125U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of wire-controlled steering systems, in particular to an angle limiting mechanism of a wire-controlled steering feel simulator. Background Art
[0002] The steering system is a major component of a car and is used to change the direction of the vehicle. Its performance directly affects the stability of vehicle handling. In traditional steering systems, there is a mechanical connection between the steering wheel and the actuator. The angle limit structure is set on the actuator to prevent the steering wheel from rotating without limit. This mechanical connection method takes up a lot of space. The wire control steering system mainly consists of three parts: the steering wheel assembly, the steering actuator assembly and the main controller (ECU). There is no mechanical connection between the steering wheel and the steering actuator assembly, which completely gets rid of the inherent limitations of the traditional steering system, brings convenience to the driver, and improves the safety of the car. It is a new generation of steering system developed after the electric power steering system, which has better handling stability than the electric power steering system.
[0003] The steering wheel and actuator of the steer-by-wire system are connected only by cables. When the driver turns the steering wheel, the steering wheel angle is converted into an electrical signal through the sensor to drive the wheels to rotate. To prevent the steering wheel from turning infinitely, the limit position of the angle can be set by software. When the limit position is reached, the hand feel simulator can feedback a reverse torque to limit the position. Usually, this torque is small (30Nm). Once the software fails or the torque applied to the steering wheel end is too large, the steering wheel rotation angle will exceed the soft limit angle, causing the actuator to oversteer, which is easy to cause safety accidents. Therefore, it is necessary to add a hard limit structure on the basis of the soft limit to prevent oversteer.
[0004] like Figure 6As shown, the patented steering vehicle and steering column thereof with prior art publication number CN 220315093 U include a housing 1, a rotating shaft 2, a sleeve 3 and a sliding sleeve 4, wherein the sleeve 3 is fixedly sleeved on the outer peripheral wall of the rotating shaft 2, and the sliding sleeve 4 is rotatably sleeved on the outer peripheral wall of the sleeve 3, the inner wall of the housing 1 is provided with a guide groove, the outer peripheral wall of the sliding sleeve 4 is provided with a guide block 41 that moves along the limit groove, and both end surfaces of the sliding sleeve 4 are provided with a first limit block, and both ends of the sleeve 3 are provided with a second limit block 51 that movably abuts against the first limit block. The sleeve 3 rotates synchronously with the rotating shaft 2. Since the guide block 41 on the outer wall of the sleeve 4 is restricted to slide in the guide groove, which is a linear groove, the sleeve 4 generates a linear feed in the axial direction as the rotating shaft 2 rotates. When the feed reaches the second limit block 51 at one end of the sleeve 3, the first limit block on the end face of the sleeve 4 and the second limit block 51 abut against each other, the position of the sleeve 4 and the sleeve 3 is restricted, and the rotating shaft 2 can no longer rotate, so that one direction of rotation of the steering column is mechanically limited, and the other direction is similar, thereby ensuring that the rotation of the steering column will not exceed the stroke. However, this limit structure converts the rotational motion of the steering shaft into the axial motion of the slider, which occupies a large space and is prone to abnormal noise. Utility Model Content
[0005] The utility model aims to provide an angle limiting mechanism of a wire-controlled steering feel simulator to prevent a steering actuator from oversteering and limit the rotation angle of a steering wheel.
[0006] The technical solution of this utility model:
[0007] A wire-controlled steering feel simulator angle limit mechanism comprises a shell, a transmission shaft, a pinion, a gear and a dust cover, wherein the transmission shaft is rotatably mounted in the shell, a boss is fixed below the transmission shaft in the shell, a pinion is fixed at the end of the transmission shaft, a gear is arranged on the boss, the gear can rotate freely relative to the shell, a limit block is fixed on the gear, a stopper matching the position of the limit block is arranged on the shell inside the gear, dust covers are arranged on the sides of the gear and the pinion, and the dust covers are snap-connected with the shell.
[0008] Beneficial effects of the utility model:
[0009] 1. The present application limits the rotation angle of the steering wheel by the cooperation between the large and small gears, the limit block and the stop block, so that the structure is compact and simple, which greatly saves space.
[0010] 2. In the present application, a buffer sleeve is installed on the limit block and / or the stopper. The buffer sleeve is a plastic or rubber part that can avoid the impact sound when it is rotated to the extreme position. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.
[0012] Figure 1 This is a schematic diagram of the angle limit mechanism structure of the wire-controlled steering feel simulator in this application.
[0013] Figure 2 This is a schematic diagram of the angle limit mechanism structure of the wire-controlled steering feel simulator in this application.
[0014] Figure 3 This is a cross-sectional view of the angle limiting mechanism of the wire-controlled steering feel simulator for this application.
[0015] Figure 4 This is a schematic diagram of the large gear structure of the angle limiting mechanism of the wire-controlled steering feel simulator in this application.
[0016] Figure 5 This is a schematic diagram of the dust cover structure of the angle limiting mechanism of the wire-controlled steering feel simulator of this application.
[0017] Figure 6 It is a structural schematic diagram of the angle limiting mechanism of the hand feel simulator in the prior art.
[0018] Reference numerals:
[0019] Housing 1; transmission shaft 2; pinion 3; gear 4; dust cover 5; boss 6; limit block 7; stopper 8; buffer sleeve 9; convex ridge 10; motor 11; bushing 12; slot 13; buckle 14. DETAILED DESCRIPTION
[0020] In order to solve the problems in the background technology, the angle limiting mechanism of the wire-controlled steering feel simulator of the present application is specially invented to limit the steering angle of the steering wheel to prevent over-steering of the steering wheel.
[0021] It should be noted that, in the description of the present application, terms such as "inside", "outside", "above", and "below" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is only for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be understood as a limitation on the present application.
[0022] A wire-controlled steering feel simulator angle limit mechanism comprises a housing 1, a transmission shaft 2, a pinion 3, a large gear 4, and a dust cover 5. The transmission shaft 2 is rotatably mounted in the housing 1. A boss 6 is fixed to the side of the transmission shaft 2 in the housing 1 (the boss is below the transmission shaft in the figure, and can actually be above, below, left, or right). A pinion 3 is fixed to the end of the transmission shaft 2. A large gear 4 is provided on the boss 6. The large gear 4 can rotate freely relative to the boss and the housing. At least one limit block 7 is fixed to the large gear 4. At least one stop block 8 matching the position of the limit block 7 is provided on the housing inside the large gear 4. The stop block is used to block the limit block, thereby blocking the rotation of the large gear. Dust covers 5 are provided on the sides of the large gear 4 and the pinion 3, and the dust covers 5 are snap-fitted with the housing 1. A buffer sleeve 9 is provided on the outer side of the limit block 7 and / or the stop block 8 to reduce noise. The large gear 4 is connected to the housing 1 through a bearing. The large gear 4 is connected to the housing 1 via a bushing 12, and a ridge 10 is provided at a position corresponding to the large gear 4 on the inner side of the dust cover 5, and the ridge 10 contacts the large gear 4. The ridge 10 is annular.
[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not 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.
[0024] like Figure 1-2 As shown, the wire-controlled steering feel simulator includes a housing 1, a transmission shaft 2 and a motor 11, wherein the transmission shaft 2 is rotatably mounted in the housing 1, the transmission shaft 2 is connected to the steering wheel, and the motor 11 is mounted on the side of the housing 1. The pinion 3 of the angle limiting mechanism of the wire-controlled steering feel simulator of the present application is fixed on the transmission shaft 2, the gearwheel is connected to the housing, and the gearwheel 4 can rotate freely relative to the housing 1. The gearwheel 4 can be connected to the housing 1 through a bushing, a bearing, etc. At least one limit block 7 is provided on the gearwheel 4, and at least one stopper 8 of the limit block is provided on the housing 1, which is used to limit the rotation angle of the limit block. In order to increase the strength, the limit block 7 can be made integral with the gearwheel 4, and the stopper 8 can be made integral with the housing 1. A buffer sleeve 9 is provided on the limit block 7, and the buffer sleeve can also be provided on the stopper 8. The buffer sleeve 9 can also be made integral with the limit block or the stopper. The buffer sleeve is a plastic or rubber part to avoid the generation of an impact sound when rotating to the extreme position.
[0025] A plurality of buckles 14 are arranged around the dust cover 5 and are fixed in the slots 13 on the housing 1. When the large gear is connected to the boss through the bushing, a ridge is arranged inside the dust cover, which contacts the large gear and can be used to limit the position of the dust cover and the large gear, and prevent the dust cover from interfering with the small gear and the large gear. Since the gear rotates relative to the dust cover, in order to prevent abnormal noise, the dust cover can be made of plastic. If the large gear 4 is matched with the housing 1 through the bearing, the ridge 10 may not be arranged inside the dust cover 5. After the dust cover 5 is installed, it directly contacts the boss 6 on the housing 1 to limit the position of the dust cover 5. At this time, the dust cover and the housing boss do not move, and the material of the dust cover is not required.
[0026] The rotation angle from the limit block to the stopper can be converted into the hard limit angle of the steering wheel according to the gear transmission ratio. By adjusting the position of the stopper and the gear transmission ratio, the rotation angle of the limit block can be adjusted, thereby adjusting the limit angle of the steering wheel. The structure is compact and simple, which can greatly save space.
[0027] When in use, the rotation of the steering wheel drives the small gear on the transmission shaft to rotate, and the rotation of the small gear drives the large gear to rotate. The rotation angle of the steering wheel is reduced through gear transmission, and the rotation angle of the large gear is limited, thereby limiting the rotation angle of the steering wheel, thereby avoiding unlimited rotation of the steering wheel.
[0028] The above schematically describes the present invention and its implementation methods, which are not restrictive. The drawings show only one implementation method of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by the above and does not deviate from the technical solution of the present invention, and designs a structure and implementation similar to the technical solution based on the above implementation examples without creativity, they shall all fall within the protection scope of the present invention.
Claims
1. An angle limit mechanism for a wire-controlled steering feel simulator, characterized in that: It includes a shell, a transmission shaft, a pinion, a large gear, and a dust cover. The transmission shaft is rotatably installed in the shell. A boss is fixed on the side of the transmission shaft in the shell. A pinion is fixed on the end of the transmission shaft. A large gear is arranged on the boss. The large gear can rotate freely relative to the boss. A limit block is fixed on the large gear. A stop block matching the position of the limit block is arranged on the shell inside the large gear. Dust covers are arranged on the sides of the large gear and the pinion, and the dust covers are snap-connected with the shell.
2. The angle limiting mechanism of the wire-controlled steering feel simulator according to claim 1, characterized in that: A buffer sleeve is arranged outside the limit block and / or the stop block.
3. The angle limiting mechanism of the wire-controlled steering feel simulator according to claim 1, characterized in that: The large gear is connected to the housing via a bearing.
4. The angle limiting mechanism of the wire-controlled steering feel simulator according to claim 1, characterized in that: The large gear is connected to the housing via a bushing, and a convex ridge is provided at a position on the inner side of the dust cover corresponding to the large gear, and the convex ridge is in contact with the large gear.
5. The angle limiting mechanism of the wire-controlled steering feel simulator according to claim 4, characterized in that: The convex ridge is annular.
6. The angle limiting mechanism of the steering-by-wire feel simulator according to claim 1, characterized in that: The large gear is provided with at least one limiting block, and the housing is provided with at least one stopper matching the limiting block.
7. The angle limiting mechanism of the steering-by-wire feel simulator according to claim 1, characterized in that: The limit block is made into an integral structure with the large gear, and the stop block is made into an integral structure with the shell.