Dual-motor redundant steer-by-wire device
By introducing a dual motor redundant control structure and alarm system into the redundant wire-controlled steering device, the performance reduction problem caused by the failure of a single main controller is solved, the safety and reliability of the system are improved, and the fault location is discovered in a timely manner.
Patent Information
- Application Number
- CN202421192316.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-29
- Publication Date
- 2025-01-07
- Estimated Expiration
- 2034-05-29
AI Technical Summary
The existing redundant wire-controlled steering device uses a single main controller to control a single motor, resulting in reduced performance when the main controller fails, and failure diagnosis and fault tolerance cannot be carried out, affecting system safety and reliability.
Design a dual-motor redundant wire-controlled steering device, including the main steering motor, the secondary steering motor, the main controller and the secondary controller. The secondary controller takes over the operation when the main controller fails, and the alarm is carried out by the secondary controller. The device and buzzer prompt for the fault location.
It realizes quick switching to the secondary controller when the main controller fails, which improves the safety and reliability of the vehicle, and prompts the fault location for repair.
Smart Images
Figure CN222310718U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field related to electric power steering systems, and in particular to a dual-motor redundant wire-controlled steering device. Background Art
[0002] The electric power steering system is a power steering system that relies on the motor to provide auxiliary torque. It is mainly composed of a torque sensor, a vehicle speed sensor, a motor, a reduction mechanism, and an electronic control unit. When the driver manipulates the steering wheel to steer, the torque sensor detects the direction of rotation of the steering wheel and the magnitude of the torque, and transmits an electrical signal to the electronic control unit. The electronic control unit issues a command based on the torque electrical signal, rotation direction, and vehicle speed signal detected by the torque sensor, so that the motor outputs a steering torque of corresponding magnitude and direction, thereby generating auxiliary power. Therefore, a dual-motor redundant wire-controlled steering device is particularly needed.
[0003] However, existing redundant wire-controlled steering devices all have a single main controller and motor, and use a single main controller to control a single motor for execution. If the main controller fails, the performance of the wire-controlled steering system will be reduced, and fault diagnosis and fault-tolerance strategies will be unable to be implemented. The steering power performance will be reduced, affecting the safety and reliability of the system. Utility Model Content
[0004] The purpose of the utility model is to provide a dual-motor redundant wire-controlled steering device to solve the problem that the existing redundant wire-controlled steering devices proposed in the above background technology all have a single main controller and a motor, and a single main controller is used to control a single motor for execution. If the main controller fails, the performance of the wire-controlled steering system will be reduced, and fault diagnosis and fault-tolerant strategies cannot be implemented, the steering assist performance will be reduced, and the safety and reliability of the system will be affected.
[0005] To achieve the above object, the utility model provides the following technical solution: a dual-motor redundant wire-controlled steering device, comprising a steering shaft, a surface side of the steering shaft is connected to a connecting shell, a surface side of the connecting shell is installed with a main steering motor, a steering mechanism is arranged inside the connecting shell, and a redundant alarm mechanism is arranged inside the connecting shell;
[0006] The redundant alarm mechanism includes a first embedding groove, an alarm, a sub-controller, a main controller, an auxiliary steering motor, a second embedding groove and a buzzer. The first embedding groove is opened on one side of the surface of the main steering motor, the alarm is embedded on one side of the surface of the main steering motor, the sub-controller is installed on one side of the surface of the connecting shell, the main controller is installed on one side of the surface of the connecting shell, the auxiliary steering motor is installed on one side of the surface of the connecting shell, the second embedding groove is opened on one side of the surface of the auxiliary steering motor, and the buzzer is embedded on one side of the surface of the auxiliary steering motor.
[0007] Preferably, the buzzer is embedded in the second embedding groove, and the main controller is electrically connected to the main steering motor.
[0008] Preferably, the alarm is embedded in the first embedding groove, and the auxiliary controller is electrically connected to the auxiliary steering motor.
[0009] Preferably, the steering mechanism includes a tooth groove, a rotating rod, a worm, a worm wheel and a gear, a tooth groove is opened on one side of the surface of the steering shaft, a rotating rod is connected to the inside of the connecting shell, one end of the main steering motor is connected to the worm, one end of the rotating rod is connected to the worm wheel, and the other end of the rotating rod is connected to the gear.
[0010] Preferably, one side of the surface of the gear is meshed with the tooth groove, and one side of the surface of the worm is meshed with the worm wheel.
[0011] Compared with the prior art, the beneficial effects of the utility model are as follows: in the dual-motor redundant wire-controlled steering device, when the vehicle is turning normally, the main controller controls the main steering motor to drive the steering shaft to complete the steering; when the main controller fails, the sub-controller quickly takes over the steering work and controls the sub-steering motor to drive the steering shaft to complete the steering, thereby effectively improving the safety and reliability of the vehicle; and when the main controller or the sub-controller fails, an alarm or buzzer will be triggered, thereby enabling the driver to quickly find the fault so as to repair it in time. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 This is a schematic diagram of the cross-sectional appearance structure of the utility model;
[0013] Figure 2 This is a schematic diagram of the decomposition structure of the redundant alarm mechanism of the utility model;
[0014] Figure 3 This is a schematic cross-sectional view of the steering mechanism of the utility model;
[0015] Figure 4 For this utility model Figure 3 Enlarged structural diagram at A in the middle.
[0016] In the figure: 1. steering shaft; 2. connecting shell; 3. main steering motor; 4. steering mechanism; 401. tooth groove; 402. rotating rod; 403. worm; 404. worm wheel; 405. gear; 5. redundant alarm mechanism; 501. first embedded groove; 502. alarm; 503. auxiliary controller; 504. main controller; 505. auxiliary steering motor; 506. second embedded groove; 507. buzzer. DETAILED DESCRIPTION
[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0018] See also Figure 1-4 The utility model provides a technical solution: a dual-motor redundant wire-controlled steering device, comprising a steering shaft 1, a surface side of the steering shaft 1 is connected to a connecting shell 2, a surface side of the connecting shell 2 is installed with a main steering motor 3, a steering mechanism 4 is arranged inside the connecting shell 2, and a redundant alarm mechanism 5 is arranged inside the connecting shell 2;
[0019] The redundant alarm mechanism 5 includes a first embedding groove 501, an alarm 502, a sub-controller 503, a main controller 504, a sub-steering motor 505, a second embedding groove 506 and a buzzer 507. The first embedding groove 501 is provided on one side of the surface of the main steering motor 3, and the alarm 502 is embedded on one side of the surface of the main steering motor 3. The sub-controller 503 is installed on one side of the surface of the connecting shell 2, and the main controller 504 is installed on one side of the surface of the connecting shell 2. The sub-steering motor 505 is installed on one side of the surface of the connecting shell 2, and the second embedding groove 506 is provided on one side of the surface of the sub-steering motor 505. The buzzer 507 is embedded on one side of the surface of the sub-steering motor 505. When the driver turns, the main controller 504 operates the steering control The control algorithm and the road sense feedback algorithm are used, and then the main steering motor 3 is controlled to drive the steering shaft 1 to control the steering of the vehicle, while the auxiliary steering motor 505 is in a standby state or an auxiliary state. When the main controller 504 fails, the alarm 502 inside the first slot 501 sounds an alarm, and then the auxiliary controller 503 continues to work. Subsequently, the auxiliary controller 503 controls the auxiliary steering motor 505 to rotate and drive the steering shaft 1, so that the vehicle can maintain normal steering operation after the main controller 504 fails, thereby improving the safety and reliability of the vehicle. When the auxiliary steering motor 505 fails, the buzzer 507 inside the second slot 506 sounds an alarm, which effectively enables the driver to quickly find the fault so as to repair it in time.
[0020] Furthermore, the buzzer 507 is embedded in the second embedding groove 506, and the main controller 504 is electrically connected to the main steering motor 3. Through the setting of the main controller 504 and the buzzer 507, when in use, the main controller 504 is used to control the rotation of the main steering motor 3, so as to facilitate the subsequent main steering motor 3 to drive the steering shaft 1 to complete the steering. When the buzzer 507 sounds, it can effectively remind the driver of the location of the vehicle fault, thereby quickly resolving it.
[0021] Furthermore, the alarm 502 is embedded in the first embedding groove 501, and the sub-controller 503 is electrically connected to the sub-steering motor 505. Through the setting of the sub-controller 503, when in use, the sub-controller 503 is used for backup. When the main controller 504 fails, the sub-controller 503 can take over the steering work in time, thereby improving the safety and reliability of the vehicle.
[0022] Furthermore, the steering mechanism 4 includes a tooth groove 401, a rotating rod 402, a worm 403, a worm wheel 404 and a gear 405. A tooth groove 401 is opened on one side of the surface of the steering shaft 1, and the rotating rod 402 is connected to the inside of the connecting shell 2. One end of the main steering motor 3 is connected to the worm 403, one end of the rotating rod 402 is penetrated and connected to the worm wheel 404, and the other end of the rotating rod 402 is penetrated and connected to the gear 405. Through the arrangement of the tooth groove 401, the rotating rod 402, the worm 403, the worm wheel 404 and the gear 405, when in use, when steering is required, the main steering motor 3 is started first, and the main steering motor 3 drives the worm 403 to mesh with the worm wheel 404, and then the worm wheel 404 rotates and drives the rotating rod 402 to rotate, and then the rotating rod 402 drives the gear 405 to mesh with the tooth groove 401, thereby driving the steering shaft 1 to complete the steering of the vehicle.
[0023] Furthermore, one side of the surface of the gear 405 is meshed with the tooth groove 401, and one side of the surface of the worm 403 is meshed with the worm wheel 404. Through the setting of the gear 405, when in use, the gear 405 and the tooth groove 401 are meshed, and the gear 405 can drive the steering shaft 1 to move, thereby completing the steering of the vehicle.
[0024] Working principle: First, when the driver turns, the main controller 504 runs the steering control algorithm and the road sense feedback algorithm, and then starts the main steering motor 3. The main steering motor 3 drives the worm 403 to mesh with the worm wheel 404, and then the worm wheel 404 rotates and drives the rotating rod 402 to rotate, and then the rotating rod 402 drives the gear 405 to mesh with the tooth groove 401, thereby driving the steering shaft 1 to complete the steering of the vehicle and realize the steering control of the vehicle, and the auxiliary steering motor 505 is in a standby state or an auxiliary state. When the main controller 504 fails, the alarm 502 inside the first slot 501 alarms, and then the auxiliary controller 503 continues to work. Subsequently, the auxiliary controller 503 controls the auxiliary steering motor 505 to rotate and drive the steering shaft 1, so that the vehicle can maintain normal steering operation after the main controller 504 fails, thereby improving the safety and reliability of the vehicle. When the auxiliary steering motor 505 fails, the buzzer 507 inside the second slot 506 alarms, which effectively enables the driver to quickly find the fault so as to repair it in time.
[0025] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A dual-motor redundant wire-controlled steering device, comprising a steering shaft (1), characterized in that: A connecting shell (2) is connected to one side of the surface of the steering shaft (1), a main steering motor (3) is installed on one side of the surface of the connecting shell (2), a steering mechanism (4) is arranged inside the connecting shell (2), and a redundant alarm mechanism (5) is arranged inside the connecting shell (2); The redundant alarm mechanism (5) comprises a first embedding groove (501), an alarm (502), a sub-controller (503), a main controller (504), a sub-steering motor (505), a second embedding groove (506) and a buzzer (507); a first embedding groove (501) is provided on one side of the surface of the main steering motor (3); an alarm (502) is embedded on one side of the surface of the main steering motor (3); a sub-controller (503) is installed on one side of the surface of the connecting shell (2); a main controller (504) is installed on one side of the surface of the connecting shell (2); a sub-steering motor (505) is installed on one side of the surface of the connecting shell (2); a second embedding groove (506) is provided on one side of the surface of the sub-steering motor (505); and a buzzer (507) is embedded on one side of the surface of the sub-steering motor (505).
2. A dual-motor redundant steer-by-wire device according to claim 1, characterized in that: The buzzer (507) is embedded in the second embedding groove (506), and the main controller (504) is electrically connected to the main steering motor (3).
3. The dual-motor redundant steer-by-wire device according to claim 1, characterized in that: The alarm (502) is embedded in the first embedding groove (501), and the auxiliary controller (503) is electrically connected to the auxiliary steering motor (505).
4. The dual-motor redundant steer-by-wire device according to claim 1, characterized in that: The steering mechanism (4) comprises a tooth groove (401), a rotating rod (402), a worm (403), a worm wheel (404) and a gear (405); a tooth groove (401) is provided on one side of the surface of the steering shaft (1); the interior of the connecting shell (2) is connected to the rotating rod (402); one end of the main steering motor (3) is connected to the worm wheel (404); one end of the rotating rod (402) is connected to the worm wheel (404); and the other end of the rotating rod (402) is connected to the gear (405).
5. A dual-motor redundant steer-by-wire device according to claim 4, characterized in that: One side of the surface of the gear (405) is meshed with the tooth groove (401), and one side of the surface of the worm (403) is meshed with the worm wheel (404).