CN219257474U

CN219257474U - Novel automobile steer-by-wire actuating mechanism

Info

Publication number: CN219257474U
Application number: CN202320638812.3U
Authority: CN
Inventors: 朱东博; 郭占杰; 张艳芝; 李森; 冯琦; 张奇博
Original assignee: North Henan Steering System Xinxiang Co ltd
Current assignee: North Henan Steering System Xinxiang Co ltd
Priority date: 2023-03-28
Filing date: 2023-03-28
Publication date: 2023-06-27
Anticipated expiration: 2033-03-28

Abstract

The utility model discloses a novel automobile steering-by-wire actuating mechanism, which comprises a shell, wherein a controller module is arranged outside the shell, the controller module comprises a signal receiver, a displacement measuring device and a motor, a belt is arranged on an output shaft of the motor, and a rack is arranged inside the shell; one end of the rack is provided with a screw rod, the screw rod is sleeved with a ball nut, the internal thread of the ball nut is matched with the screw rod, the external thread of the ball nut is arranged outside the ball nut, and the ball nut is connected with the belt through the external thread; the displacement measuring device comprises a sensor stator, a sensor rotor and a limiting moving block; the scheme has simple structure, can adapt to various steering structures, is convenient to assemble and has high measurement accuracy.

Description

Novel automobile steer-by-wire actuating mechanism

Technical Field

The utility model relates to the field of steering systems, in particular to a novel automobile steer-by-wire actuating mechanism.

Background

An automobile steer-by-wire System (SBW) is a novel power steering system which is improved based on the existing electric steering system, and uses an electric signal to replace a mechanical structure to transmit steering information. With the development of motorization, informatization, intellectualization and sharing of automobiles, automatic driving is becoming an important configuration of automobiles, and steer-by-wire systems are getting more attention and developing as steering solutions for automatic driving.

The steering actuating mechanism is a key component of the steer-by-wire system, is a basis for correctly executing and ensuring the realization of steering, and needs to realize the movement of the racks through the assistance of a motor so as to change the traveling angle of wheels, and in order to ensure the control accuracy, the position of the racks is fed back when the actuating mechanism needs to be used for the closed-loop control of the system. The existing drive-by-wire steering mechanism directly adopts a traditional rack type electric power steering (R-EPS) or a double pinion type electric power steering (DP-EPS), and has higher cost and poorer arrangement convenience due to related mechanisms such as mechanically connected input shafts and the like. Therefore, it would be necessary to design a novel steer-by-wire mechanism that is simple in structure, low in cost, and easy to assemble.

Disclosure of Invention

In order to solve the problems in the background art, the utility model provides a novel automobile steer-by-wire actuating mechanism.

The novel automobile steering-by-wire actuating mechanism comprises a shell, wherein a controller module is arranged outside the shell, the controller module comprises a signal receiver, a displacement measuring device and a motor, a belt is arranged on an output shaft of the motor, and a rack is arranged inside the shell; one end of the rack is provided with a screw rod, the screw rod is sleeved with a ball nut, the internal thread of the ball nut is matched with the screw rod, the external thread of the ball nut is arranged outside the ball nut, and the ball nut is connected with the belt through the external thread; the displacement measuring device comprises a sensor stator, a sensor rotor and a limiting moving block; the surface of the other end part of the rack is provided with a fixing bolt, and the limiting moving block is fixedly connected with the rack by the fixing bolt; a horizontal limiting groove is formed in the position, corresponding to the fixing bolt, of the shell, the limiting moving block is movably assembled in the limiting groove, and a sensor rotor is mounted on the surface of the limiting moving block; the surface of the limiting groove is provided with a connecting cover plate, and the surface of the connecting cover plate is provided with a sensor stator.

Further, the width of the limiting groove is matched with the size of the limiting moving block, and the limiting groove is in small clearance fit with the limiting moving block.

Further, the limit movable block is of a rectangular structure, and a groove for storing lubricating oil is formed in the side surface of the limit movable block.

Further, the limiting moving block is made of PA+GF materials.

The beneficial effects of the utility model are as follows:

1. the sensor stator is arranged on the shell and the sensor rotor is used for collecting the drive-by-wire of the executing mechanism, so that data collection is more accurate, errors are smaller, and abrasion affects the measured result less. 2. The displacement measuring device has the advantages of simple structure, small volume, little change to the existing steering mechanism and easier assembly. Can easily adapt to various steering structures and adjust the steering structures of different models. 3. The structure matches the shapes of the limiting movable block and the limiting groove, limits that the limiting movable block can only move in the limiting groove, and avoids that the rack rotates to drive the sensor to move up and down to influence the measurement accuracy.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic view of a portion of the structure of the displacement measuring device of the present utility model.

The device comprises a shell 1, a controller module 2, a signal receiver 3, a displacement measuring device 4, a motor 5, a belt 6, a rack 7, a lead screw 8, a ball nut 9, a sensor stator 11, a sensor rotor 12, a limiting moving block 13, a fixing bolt 14, a limiting groove 15 and a connecting cover plate 16.

Detailed Description

Referring to fig. 1, a novel steering-by-wire actuator of an automobile comprises a shell 1, wherein a controller module 2 is arranged outside the shell 1, the controller module 2 comprises a signal receiver 3, a displacement measuring device 4 and a motor 5, a belt 6 is arranged on an output shaft of the motor 5, and a rack 7 is arranged inside the shell 1; one end of the rack 7 is provided with a screw rod 8, the screw rod 8 is sleeved with a ball nut 9, the internal thread of the ball nut 9 is matched with the screw rod 8, the external thread of the ball nut 9 is arranged, and the ball nut is connected with the belt 6 through the external thread; the displacement measuring device 4 comprises a sensor stator 11, a sensor rotor 12 and a limiting moving block 13; the other end surface of the rack 7 is provided with a fixed bolt 14, and the fixed bolt 14 fixedly connects the limiting moving block 13 with the rack 7; a horizontal limit groove 15 is arranged at a position of the shell 1 corresponding to the fixed bolt 14, a limit moving block 13 is movably assembled in the limit groove 15, and a sensor rotor 12 is arranged on the surface of the limit moving block 13; the surface of the limit groove 15 is provided with a connecting cover plate 16, and the surface of the connecting cover plate 16 is provided with a sensor stator 11.

The width of the limit groove 15 is matched with the size of the limit moving block 13, and the limit groove 15 is in small clearance fit with the limit moving block 13. The limit moving block 13 is of a rectangular structure, and a groove for storing lubricating oil is formed in the side surface of the limit moving block 13. The limiting moving block 13 is made of PA+GF material.

The working principle of the utility model is as follows:

the drive-by-wire steering actuating mechanism is fixed on the automobile chassis through the shell 1, after the signal receiver 3 receives the drive-by-wire steering instruction of the whole automobile, the signal receiver 3 drives the belt 6 to rotate through the motor 5, the belt 6 further drives the ball nut 9 to rotate, the ball nut 9 drives the screw rod 8 on the rack to rotate, and at the moment, the rack 7 starts to axially displace.

The sensor rotor 12 is arranged on a limit moving block 13 on the rack and can move in a limit groove 15 on the shell 1. Since the rack 7 is provided with a rotatable screw 8 at one end, a slight radial displacement of the rack 7 occurs during the axial displacement. Because the limit groove 15 is horizontally arranged, and the limit groove 15 is in small clearance fit with the limit moving block 13, the sensor rotor 12 is ensured to be always displaced in the horizontal direction of the limit groove 15.

The steering of the car is not infinite, so that the displacement distance of the rack 7 and the length of the limit groove 15 are maximized. The limiting groove 15 is provided with a connecting cover plate 16, the connecting cover plate 16 is provided with a sensor stator 11, when the sensor rotor 12 is displaced in the limiting groove 15, the sensor stator 11 can detect the displacement of the rack 7 through the relative displacement between the sensor stator and the sensor rotor 12, signals are transmitted to the signal receiver 3, and finally, the displacement is controlled in a closed loop mode.

In order to reduce friction noise and prolong the service life between the limiting moving block 13 and the shell 1, the limiting moving block 13 is made of PA+GF material, and the side surface of the limiting moving block 13 is provided with a groove for storing oil. Besides the sensor stator 11, the connecting cover plate 16 also seals the lubricating oil in the limit groove 15, so that overflow is avoided.

Although the present utility model has been described with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements and changes may be made without departing from the spirit and principles of the present utility model.

Claims

1. The novel automobile steering-by-wire actuating mechanism comprises a shell, wherein a controller module is arranged outside the shell, the controller module comprises a signal receiver, a displacement measuring device and a motor, a belt is arranged on an output shaft of the motor, and a rack is arranged inside the shell; the device is characterized in that a screw is arranged at one end of the rack, a ball nut is sleeved on the screw, the internal thread of the ball nut is matched with the screw, the external thread of the ball nut is arranged outside the ball nut, and the ball nut is connected with the belt through the external thread; the displacement measuring device comprises a sensor stator, a sensor rotor and a limiting moving block; the surface of the other end part of the rack is provided with a fixing bolt, and the limiting moving block is fixedly connected with the rack by the fixing bolt; a horizontal limiting groove is formed in the position, corresponding to the fixing bolt, of the shell, the limiting moving block is movably assembled in the limiting groove, and a sensor rotor is mounted on the surface of the limiting moving block; the surface of the limiting groove is provided with a connecting cover plate, and the surface of the connecting cover plate is provided with a sensor stator.

2. The novel steering-by-wire actuator of claim 1 wherein the width of the limit groove matches the size of the limit block and the limit groove is in small clearance fit with the limit block.

3. The novel steering-by-wire actuator of claim 1, wherein the limit moving block has a rectangular structure, and grooves for storing lubricating oil are distributed on the side surfaces of the limit moving block.

4. The novel steering-by-wire actuator of claim 1, wherein the limit moving block is made of pa+gf.