CN216508574U

CN216508574U - Steering mechanism for wheel

Info

Publication number: CN216508574U
Application number: CN202123331096.4U
Authority: CN
Inventors: 洪志超
Original assignee: Robert Bosch GmbH
Current assignee: Robert Bosch GmbH
Priority date: 2021-12-28
Filing date: 2021-12-28
Publication date: 2022-05-13
Anticipated expiration: 2031-12-28

Abstract

The utility model provides a steering mechanism (1) for wheels, which comprises a rack shaft (10), a connecting part (11) and a knuckle arm (12), wherein the steering mechanism (1) for the wheels further comprises a steering sensing device (2), the rack shaft (10) is arranged to move in the width direction of a vehicle, the connecting part (11) is connected with the rack shaft (10) and the knuckle arm (12) and used for converting the movement of the rack shaft (10) in the width direction of the vehicle into the pivoting of the knuckle arm (12), the knuckle arm (12) is a vertical rotating shaft and is arranged to rotate around the axis of the knuckle arm under the driving of the movement of the rack shaft (10), and the rotating motion of the knuckle arm (12) drives a steering wheel of the vehicle to rotate.

Description

Steering mechanism for wheel

Technical Field

The present invention relates to a steering mechanism for a wheel of a vehicle, and more particularly to a steering mechanism for a wheel of an unmanned vehicle.

Background

The conventional vehicle controls a steering angle of the vehicle by detecting a rotation angle of a steering wheel. The steering wheel angle sensor is typically mounted on the steering column of the steering wheel. With the maturity and development of automobile technology, more and more automatic driving vehicles cancel steering input devices such as a steering wheel and a steering column, and do not need the steering operation of a driver. For example, more and more e-commerce companies and logistics companies are beginning to favor the last kilometer of delivery services with unmanned small freight vehicles (hereinafter, simply referred to as small freight vehicles). The small freight vehicle has low running speed and high randomness and activity, and is suitable for entering various districts, office buildings and other places for delivery. In order to facilitate background control of the vehicle, steering information of the vehicle is still required even though the steering wheel is not provided.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a steering mechanism for wheels, which can provide steering information in a low-cost mode.

For this reason, according to an aspect of the present application, provide a steering mechanism for wheel, including rack shaft, connecting portion, knuckle arm, steering mechanism for wheel still includes and turns to sensing device, the rack shaft is set up to remove in the width direction of vehicle, rack shaft and knuckle arm are connected to connecting portion, convert the rack shaft to the pivoting of knuckle arm in the removal of the width direction of vehicle, the knuckle arm is vertical pivot, is set up to be under the drive of the removal of rack shaft and be rotary motion around self axle center, and the rotary motion of knuckle arm drives the directive wheel of vehicle and rotates. The steering sensing device comprises a rotary encoder, and the rotary encoder is fixed on the knuckle arm and rotates together with the knuckle arm.

The steering mechanism for the wheels is provided with a steering sensing device, namely: the rotary encoder is arranged on the steering knuckle arm which drives the steering wheel of the vehicle to rotate, the sensor is used for sensing the rotation of the rotary encoder, the steering information of the vehicle wheel can be accurately sensed, and the steering sensing device is low in cost and convenient to install, so that the steering information of the vehicle can be provided in a low-cost mode.

Drawings

The above and other features and advantages of the present invention will be better understood in the following description of embodiments of the utility model with reference to the accompanying drawings. Wherein:

fig. 1 shows a schematic configuration diagram of a steering mechanism for a wheel according to an embodiment of the present invention.

Fig. 2 shows a schematic configuration diagram of a steering mechanism for a wheel according to another embodiment of the present invention.

Detailed Description

A composite wire harness according to a preferred embodiment of the present invention will be described below with reference to the accompanying drawings.

Referring to fig. 1, a steering mechanism 1 for vehicle wheels according to an embodiment of the present invention is provided between steered wheels (not shown) of a vehicle, the steering mechanism 1 for vehicle wheels includes a rack shaft 10, a connecting portion 11, a knuckle arm 12, and a steering sensing device 2, the rack shaft 10 is provided to move in a width direction of the vehicle, the connecting portion 11 connects the rack shaft 10 and the knuckle arm 12, the connecting portion 11 converts the movement of the rack shaft 10 in the width direction of the vehicle into a pivoting movement of the knuckle arm 12, the knuckle arm 12 is a vertical rotating shaft provided to rotate around its own axis under the driving of the movement of the rack shaft 10, and the rotating movement of the knuckle arm 12 rotates the steered wheels of the vehicle. The rotation angle of the knuckle arm 12 may be the steering angle of the steered wheel, or the rotation angle of the knuckle arm 12 may be set to have a proportional relationship with the steering angle of the steered wheel, according to actual requirements. Fig. 1 only schematically illustrates the general connection relationship between the rack shaft 10 and the connecting portion 11 and the knuckle arm 12, and the specific structures, connection relationships and operation principles of the rack shaft 10, the connecting portion 11 and the knuckle arm 12 may be different in different vehicle types, which is well known to those skilled in the art and will not be described herein.

The steering sensing device 2 includes a rotary encoder 21 and a sensor 22, wherein the rotary encoder 21 is fixed to the knuckle arm 12 to rotate together with the knuckle arm 12, and the sensor 22 is mounted at a non-rotatable portion of the wheel to face the rotary encoder 21 with an air gap, so that the sensor 22 can sense and collect the rotation of the rotary encoder 21, and the rotation angle and the rotation speed of the knuckle arm 12 can be calculated based on the rotation signal collected by the sensor 22.

Referring to fig. 2, in the steering mechanism 1 for vehicle wheels according to another embodiment of the present invention, the steering sensing device 2 includes two sensors 22, which are respectively mounted at non-rotatable positions of different positions of the vehicle wheels, respectively face the rotary encoder 21 from different positions and directions, so as to acquire and sense the rotation of the rotary encoder 21 from different positions, to improve the accuracy of the measured rotation angle and rotation speed of the knuckle arm 12. The two sensors 22 face the rotary encoder 21 with the same air gap. Depending on the actual mounting control, the two sensors 22 may face the rotary encoder 21 with different air gaps.

The steering mechanism 1 for vehicle wheels further includes a motor 30 and a gear 31 for driving the rack shaft 10 to move. The rotation of the output shaft of the motor 30 drives the gear 31 to rotate, and the rotating gear 31 causes the rack shaft 10 to move in the width direction of the vehicle. The motor 30 and the gear 31 are well known to those skilled in the art and will not be described in detail herein.

The steering mechanism for the wheels is provided with a steering sensing device, namely: the rotary encoder is arranged on the knuckle arm 12 which drives the steering wheel of the vehicle to rotate, the sensor is used for sensing the rotation of the rotary encoder, the steering information of the vehicle wheel can be accurately sensed, and the steering sensing device is low in cost and convenient to install, so that the steering information of the vehicle can be provided in a low-cost mode.

While particular embodiments of the present invention have been described, they have been presented by way of example only, and are not intended to limit the scope of the utility model. Rather, the structures described herein may be embodied in a variety of other forms; additionally, various substitutions and alterations may be made to the configurations described herein without departing from the spirit and scope of the present invention.

Claims

1. A steering mechanism (1) for a wheel, which is arranged between steering wheels of a vehicle, includes a rack shaft (10), a connecting portion (11) and a knuckle arm (12), and is characterized in that the steering mechanism (1) for a wheel further includes a steering sensing device (2), the rack shaft (10) is arranged to move in the width direction of the vehicle, the connecting portion (11) connects the rack shaft (10) and the knuckle arm (12), the connecting portion (11) converts the movement of the rack shaft (10) in the width direction of the vehicle into the pivoting of the knuckle arm (12), the knuckle arm (12) is a vertical rotating shaft arranged to rotate around its axis under the driving of the movement of the rack shaft (10), the rotating motion of the knuckle arm (12) drives the steering wheels of the vehicle to rotate, the steering sensing device (2) includes a rotary encoder (21), the rotary encoder (21) is fixed on the knuckle arm (12) and rotates together with the knuckle arm (12).

2. Steering mechanism (1) for vehicle wheels according to claim 1, characterized in that said steering sensing means (2) comprise a sensor (22), said sensor (22) being fitted at the non-rotatable part of the wheel.

3. The steering mechanism (1) for vehicle wheels according to claim 2, wherein the sensor (22) faces the rotary encoder (21) with an air gap.

4. Steering mechanism (1) for vehicle wheels according to claim 2, characterized in that said steering sensing means (2) comprise two sensors (22), respectively fitted at different positions of the wheel, non-rotatable, to acquire and sense the rotation of the rotary encoder (21) from different positions.

5. Steering mechanism (1) for vehicle wheels according to claim 4, characterized in that the two sensors (22) face the rotary encoder (21) with the same or different air gaps.

6. The steering mechanism (1) for vehicle wheels according to claim 1, characterized in that the rotation angle of the knuckle arm (12) may be a steering angle of a steered wheel, or the rotation angle of the knuckle arm (12) is set in a proportional relationship with the steering angle of the steered wheel.

7. The steering mechanism (1) for vehicle wheels according to claim 1, wherein the steering mechanism (1) for vehicle wheels comprises a motor (30) and a gear (31) that drive a rack shaft (10) to move, and the rotational movement of an output shaft of the motor (30) drives the gear (31) to rotate, and the rotating gear (31) drives the rack shaft (10) to move in the width direction of the vehicle.