CN212354133U - Steering system of vehicle and vehicle - Google Patents

Abstract

The utility model provides a steering system and vehicle of vehicle relates to the vehicle chassis field. The electric power-assisted system comprises a torque sensor arranged adjacent to a steering wheel of a vehicle, a motor indirectly connected with wheels of the vehicle and a controller arranged on an axle of the vehicle and connected with the torque sensor and the motor, wherein the torque sensor is used for detecting steering torque of the steering wheel, the motor is used for driving the wheels to turn, and the controller controls the motor to rotate according to the steering torque so as to drive the wheels to turn. The utility model discloses well torque sensor can detect the moment of torsion of steering wheel fast, and install controller and the motor on the axle can reduce transmission route with power transmission to wheel as early as possible to improve power transmission's efficiency, can control the wheel fast and turn to.

Description

Steering system of vehicle and vehicle

Technical Field

The utility model relates to a vehicle chassis field especially relates to a steering system and vehicle of vehicle.

Background

In the prior art, each part in the electric power steering system is far away from each other, the transmission time of signals and transmission power is long, the power-assisted point is far away from the wheels, and the torque of the power-assisted point can act on the left wheel and the right wheel through a complex transmission mechanism, so that the torque transmission efficiency of the electric power steering system is low, and the left wheel and the right wheel of a vehicle cannot be quickly subjected to steering control.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an object of first aspect is to provide a steering system of vehicle solves the technical problem that can not control the wheel fast and turn to among the prior art.

The utility model discloses the further purpose of first aspect reduces the frictional force of second reduction gears when power transmission.

The utility model discloses the purpose of second aspect provides a vehicle.

According to the utility model discloses an aim of first aspect, the utility model provides a steering system of vehicle, including electronic helping hand system, it includes:

a torque sensor disposed adjacent to a steering wheel of a vehicle, for detecting a steering torque of the steering wheel;

the motor is indirectly connected with the wheels of the vehicle and is used for driving the wheels to steer; and

and the controller is arranged on an axle of the vehicle, is connected with the torque sensor and the motor, and controls the motor to rotate according to the steering torque so as to drive the wheels to steer.

Optionally, the motor is indirectly connected with the wheel through a first speed reducing mechanism and a pull rod; wherein

The first speed reducing mechanism comprises a gear connected with the motor so as to drive the gear to rotate through the motor; the pull rod is provided with a rack meshed with the gear, and the pull rod is connected with the wheels so as to drive the pull rod to move through the rotation of the gear, thereby driving the wheels to turn.

Optionally, the method further comprises:

and the displacement sensor is arranged in the shell of the first speed reducing mechanism and used for detecting the displacement of the pull rod.

Optionally, the vehicle further comprises a mechanical steering system which is formed by sequentially connecting a steering column, an intermediate shaft, a second speed reducing mechanism and the pull rod of the vehicle.

Optionally, the second speed reducing mechanism includes a ball screw.

Optionally, the intermediate shafts comprise a first intermediate shaft and a second intermediate shaft connected to each other, wherein,

the second intermediate shaft is telescopic.

Optionally, the second countershaft comprises:

the spline on the outer surface of the inner shaft is an internal spline;

the shaft sleeve is sleeved on the inner shaft, and a spline on the inner surface of the shaft sleeve is an external spline; the internal spline and the external spline cooperate to enable the inner shaft and the bushing to move relative to each other.

Optionally, the method further comprises:

a first angle steering gear disposed between the steering column and the first intermediate shaft;

a second angle diverter disposed between the first intermediate shaft and the second intermediate shaft.

According to the utility model discloses the purpose of second aspect, the utility model also provides a vehicle, it installs foretell a steering system.

The utility model discloses including the torque sensor that the steering wheel of neighbouring vehicle set up, the motor that links to each other indirectly with the wheel of vehicle and set up on the axle of vehicle and the controller that links to each other with torque sensor and motor, wherein, torque sensor is used for detecting the steering torque of steering wheel, and the motor is used for driving wheel to turn to, and the controller rotates according to steering torque control motor to drive the wheel and turn to. The utility model discloses well torque sensor can detect the moment of torsion of steering wheel fast, and install controller and the motor on the axle can reduce transmission route with power transmission to wheel as early as possible to improve power transmission's efficiency, can control the wheel fast and turn to.

Further, the utility model provides a contain ball among mechanical steering system's the second reduction gears, can play transmission, direction and reduce the effect of frictional force to the frictional force of second reduction gears when power transmission has been reduced.

The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.

Drawings

Some specific embodiments of the present invention will be described in detail hereinafter, by way of illustration and not by way of limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:

fig. 1 is a schematic structural view of a steering system of a vehicle according to an embodiment of the present invention;

FIG. 2 is a schematic connection diagram of a tie rod and a first reduction mechanism in the steering system of the vehicle shown in FIG. 1;

FIG. 3 is a schematic structural view of a second speed reducing mechanism in the steering system of the vehicle shown in FIG. 1;

FIG. 4 is a schematic block diagram of a portion of a second intermediate shaft in the steering system of the vehicle shown in FIG. 1;

fig. 5 is another partial schematic structural view of a second intermediate shaft in a steering system of the vehicle shown in fig. 1.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

Fig. 1 is a schematic structural view of a steering system 100 of a vehicle according to an embodiment of the present invention, and fig. 2 is a schematic connection diagram of a tie rod and a first reduction gear in the steering system of the vehicle shown in fig. 1. As shown in fig. 1-2, in one particular embodiment, a steering system 100 of a vehicle may generally include a torque sensor 11, a motor 13, and a controller 12, wherein the torque sensor 11 is disposed adjacent a steering wheel of the vehicle for detecting a steering torque of the steering wheel. The motor 13 is indirectly connected to the wheels of the vehicle for driving the wheels to turn. The controller 12 is disposed on an axle of the vehicle and connected to the torque sensor 11 and the motor 13 to control the motor 13 to rotate according to the steering torque, thereby steering the wheels.

The utility model discloses well torque sensor 11 can detect the moment of torsion of steering wheel fast, and install controller 12 and motor 13 on the axle can reduce transmission route with power transmission to wheel as early as possible to improve power transmission's efficiency, can control the wheel fast and turn to.

Further, the motor 13 is indirectly connected to the wheels through the first reduction mechanism 14 and the tie rod 15. The first speed reducing mechanism 24 includes a gear 141 connected to the motor 13 to drive the gear 141 to rotate via the motor 13, a rack 151 engaged with the gear 141 is disposed on the pull rod 15, and the pull rod 15 is connected to the wheel to drive the pull rod 15 to move via the rotation of the gear 141, so as to drive the wheel to steer. Specifically, the pull rod 15 penetrates through the housing of the first reduction mechanism 14, and the gear 141 is sleeved on the output shaft of the motor 13.

Specifically, the utility model provides a torque sensor 11 arranges between vehicle steering wheel and steering column 21, CAN improve the precision of the moment of torsion of measuring the steering wheel, reduces signal transmission time, and torque sensor 11 and controller 12 adopt the CAN communication. The controller 12 is configured to convert torque information detected by the torque sensor 11 into a displacement amount of the tie rod 15, and control the motor 13 to perform the control.

In one embodiment, the steering system 100 of the vehicle further includes a displacement sensor (not shown in the drawings) provided in the housing of the first reduction gear mechanism 14 for detecting the amount of displacement of the tie rod 15. The utility model discloses a displacement sensor can monitor the displacement volume of pull rod 15 in real time to can improve the precision that wheel 4 turned to when quick control wheel 4 turned to.

Further, the controller 12 is connected with the gateway through a CAN network and connected with the motor 13 and the displacement sensor through signal lines, the controller 12 collects torque and corner signals output by the torque sensor 11 through the gateway, collects the state and speed information of the whole vehicle at the same time, and drives the motor 13 through a set power-assisted program. The motor 13 is an important component of the electric power assisting system 10, and is connected with a low-voltage power supply of the whole vehicle through an electric wire.

The utility model discloses well torque sensor 11 can detect the moment of torsion of steering wheel fast, and install controller 12, motor 13, first reduction gears 14 on the axle can be as early as possible with power transmission to pull rod 15, has reduced transmission path, has improved power transmission's efficiency.

Further, the displacement sensor transmits the detected displacement amount of the tie rod to the controller 12, the controller 12 compares the detected displacement amount with a target displacement amount generated based on a torque signal of the torque sensor 11, and the controller 12 controls the displacement amount of the tie rod 15 to be corrected when there is a difference between the actual displacement amount and the target displacement amount.

In another embodiment, the steering system 100 of the vehicle further includes a mechanical steering system 20 connected in series by a steering column 21, an intermediate shaft 22, a second reduction mechanism 23, and a tie rod 15 of the vehicle.

The utility model discloses when detecting that electronic helping hand system 10 breaks down or can not use because of some reason, can utilize mechanical steering system 20 so that wheel 4 turns to, the moment of torsion of steering wheel is transmitted in proper order by steering column 21, jackshaft 22, second reduction gears 23 and pull rod 15. The utility model discloses combine electronic helping hand system 10 and mechanical steering system 20, can utilize another system to turn to when one of them system breaks down, security when can improving the vehicle and go.

Fig. 3 is a schematic configuration diagram of the second speed reducing mechanism 23 in the steering system 100 of the vehicle shown in fig. 1. As shown in fig. 3 and referring to fig. 1, in one embodiment, the second speed reducing mechanism 23 includes a ball screw 142, and the ball screw 142 can perform functions of transmission, guidance and friction reduction, so as to reduce the friction of the second speed reducing mechanism 23 during power transmission.

Fig. 4 is a schematic configuration diagram of a part of the second intermediate shaft 222 in the steering system 100 of the vehicle shown in fig. 1, and fig. 5 is a schematic configuration diagram of another part of the second intermediate shaft 222 in the steering system 100 of the vehicle shown in fig. 1. As shown in fig. 3-4, and referring to fig. 1, in one embodiment, countershaft 22 includes interconnected first and second countershafts 221 and 222, wherein second countershaft 222 is telescoping. Specifically, the second intermediate shaft 222 is splined. Further, the second intermediate shaft 222 includes an inner shaft 2222 and a sleeve 2221, and the splines on the outer surface of the inner shaft 2222 are internal splines 2223. The shaft sleeve 2221 is sleeved on the inner shaft 2222, the spline on the inner surface of the shaft sleeve 2221 is an external spline 2224, and the internal spline 2223 and the external spline 2224 are matched so that the inner shaft 2222 and the shaft sleeve 2221 can move relative to each other.

Specifically, the inner shaft 2222 and the shaft sleeve 2221 are telescopically connected by the engagement of the internal spline 2223 and the external spline 2224, and can relatively slide through the inner shaft 2222 and the shaft sleeve 2221 when a vehicle collision occurs, so that the impact force to an occupant during the vehicle collision can be reduced, and the safety of the occupant is further improved.

In one embodiment, the steering system 100 of the vehicle further comprises a first angle steering gear 24 and a second angle steering gear 25, wherein the first angle steering gear 24 is disposed between the steering column 21 and the first intermediate shaft 221, and the second angle steering gear 25 is disposed between the first intermediate shaft 221 and the second intermediate shaft 222. The utility model discloses a first angle steering gear 24 and second angle steering gear 25 can carry out appropriate transform to the steering torque and the steering angle of steering wheel, export steering torque for jackshaft 22 again.

In one embodiment, the first speed reducing mechanism 14 includes a ball screw, so that the friction force of the first speed reducing mechanism 14 during power transmission can be reduced.

The utility model also provides a vehicle, its steering system 100 of installing in any one of above-mentioned embodiments. The steering system 100 need not be described in detail herein.

The utility model is suitable for a dependent suspension mechanism of non can use on light-duty commercial car. In addition, the electric power assist system 10 has a small number of torque transmission mechanisms, and the electric power assist system 10 directly acts on the wheels 4, thereby improving the power transmission efficiency of the steering system.

Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been shown and described in detail herein, many other variations and modifications can be made, consistent with the principles of the invention, which are directly determined or derived from the disclosure herein, without departing from the spirit and scope of the invention. Accordingly, the scope of the present invention should be understood and interpreted to cover all such other variations or modifications.

Claims (9)

1. A steering system for a vehicle including an electric assist system, comprising:

a torque sensor disposed adjacent to a steering wheel of a vehicle, for detecting a steering torque of the steering wheel;

the motor is indirectly connected with the wheels of the vehicle and is used for driving the wheels to steer; and

and the controller is arranged on an axle of the vehicle, is connected with the torque sensor and the motor, and controls the motor to rotate according to the steering torque so as to drive the wheels to steer.

2. The steering system according to claim 1, wherein the motor is indirectly connected to the wheel through a first speed reduction mechanism and a tie rod; wherein

The first speed reducing mechanism comprises a gear connected with the motor so as to drive the gear to rotate through the motor; the pull rod is provided with a rack meshed with the gear, and the pull rod is connected with the wheels so as to drive the pull rod to move through the rotation of the gear, thereby driving the wheels to turn.

3. The steering system of claim 2, further comprising:

and the displacement sensor is arranged in the shell of the first speed reducing mechanism and used for detecting the displacement of the pull rod.

4. The steering system of claim 2, further comprising a mechanical steering system connected in series by a steering column, an intermediate shaft, a second reduction mechanism, and the tie rod of the vehicle.

5. The steering system of claim 4,

the second speed reducing mechanism comprises a ball screw.

6. The steering system of claim 4, wherein the intermediate shaft comprises a first intermediate shaft and a second intermediate shaft connected to each other, wherein,

the second intermediate shaft is telescopic.

7. The steering system of claim 6, wherein the second intermediate shaft comprises:

the spline on the outer surface of the inner shaft is an internal spline;

the shaft sleeve is sleeved on the inner shaft, and a spline on the inner surface of the shaft sleeve is an external spline; the internal spline and the external spline cooperate to enable the inner shaft and the bushing to move relative to each other.

8. The steering system of claim 6, further comprising:

a first angle steering gear disposed between the steering column and the first intermediate shaft;

a second angle diverter disposed between the first intermediate shaft and the second intermediate shaft.

9. A vehicle, characterized in that the vehicle is equipped with a steering system according to any one of claims 1-8.

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