CN220974316U - Automobile steering device, steering system and vehicle - Google Patents

Abstract

The application relates to the technical field of automobiles, in particular to an automobile steering gear, a steering system and a vehicle, wherein the automobile steering gear comprises the following components: the first steering motor is connected with one side of the wheel through a first transmission mechanism; the second steering motor is connected with the wheel on the other side through a second transmission mechanism; and a mode switching part arranged between the first steering motor and the second steering motor for switching the steering rack separation or coupling between the first steering motor and the second steering motor so as to switch the wheels at two sides to enter an independent steering mode and a coupling steering mode. Therefore, the problems that in the related art, the volume of the switching control part of independent steering and coupling steering of the left wheel and the right wheel is large, the waterproof and dustproof requirements are high, the system components are difficult to fix, fatigue damage is easy to occur, and the like are solved.

Description

Automobile steering device, steering system and vehicle

Technical Field

The application relates to the technical field of automobiles, in particular to an automobile steering gear, a steering system and a vehicle.

Background

Steering systems are mainly used for controlling the lateral movement of a vehicle and are one of key systems on automobiles. With the development of intelligent control technology, the configuration and control method of an automobile steering system are continuously improved, and new technologies such as rear wheel steering, four-wheel independent steering and the like are developed. The independent steering can flexibly adjust the turning radius of the vehicle, can be reduced to zero theoretically, and improves the steering stability and the passing capacity of the vehicle. The independent steering technology can also adjust the wheel track to be an ideal ackerman steering trapezoid, so that the tire abrasion is reduced. At present, two main methods for realizing independent steering are available, namely, an independent steering motor and a transmission system are used for each wheel, and a clutch structure is added in the middle of a traditional steering machine, so that the switching between independent steering and coupling steering of left and right wheels is realized.

In the related art, a method that each wheel uses an independent steering system is adopted, and different types of wheel edge steering and driving structures are designed. In addition, when a single independent steering system fails, steering of the entire vehicle may be out of control.

In the related art, a set of planetary gears is added in the middle of a traditional steering engine, so that the steering engine can be switched between two control modes, and not only can the left wheel and the right wheel be independently controlled by using two steering motors, but also the whole steering engine can be jointly controlled by torque coupling. Steering device assembly, steering system, vehicle that can switch steering mode disconnect the steering column of left and right wheels from the middle part and set up a clutch, realize the switching of left and right wheels independent steering and coupling steering mode.

However, there are two problems associated with the application of such methods to vehicles: firstly, the volume of the switching control part is larger, and the occupied space is obviously larger than that of the traditional steering system. The steering gear has higher waterproof and dustproof requirements at a lower position of the automobile chassis, and if a waterproof protective cover is additionally arranged outside the component, the system volume and the cost can be further increased. Secondly, the left steering rod and the right steering rod are not on the same straight line, and under the coupling steering mode, the aligning moment of the left wheel and the right wheel can generate shearing stress and rotating moment at the joint part, so that the system components are difficult to fix and are easier to fatigue damage.

Disclosure of utility model

The application provides an automobile steering gear, a steering system and a vehicle, which are used for solving the problems that in the related art, the volume of a control part for switching left and right independent steering and coupling steering of wheels is large, the waterproof and dustproof requirements are high, the system components are difficult to fix, fatigue and damage are easy to occur, and the like.

A first aspect of the present application provides an automotive steering gear comprising: the first steering motor is connected with one side of the wheel through a first transmission mechanism; the second steering motor is connected with the wheel on the other side through a second transmission mechanism; and the mode switching component is arranged between the first steering motor and the second steering motor and is used for switching the steering racks between the first steering motor and the second steering motor to be separated or coupled so as to switch the wheels at two sides to enter an independent steering mode and a coupling steering mode.

Optionally, the mode switching part includes: an electromagnetic switch pin disposed on a second steering rack end of the second steering motor; the power supply circuit is electrically connected with the electromagnetic switch pin and supplies power to the electromagnetic switch pin; the electromagnetic switch pin is in a spring-open state when not electrified and is clamped in a slotted hole at the tail end of a first steering rack of the first steering motor, so that the steering racks at two sides are restrained from moving to enter the coupling steering mode; the electromagnetic switch pin is in a contracted state when being electrified and is contracted to the inner side of the tail end of the second steering rack, so that the steering racks on two sides can independently move to enter the independent steering mode.

Optionally, the electromagnetic switch pin includes: a first pin and a second pin; a first electromagnet connected to the first pin and a second electromagnet connected to the second pin; the elastic piece is arranged between the first electromagnet and the second electromagnet, and when the electromagnetic switch pin is electrified, the first electromagnet and the second electromagnet attract each other to pull the first pin and the second pin inwards; when the electromagnetic switch pin is not electrified, the elastic force provided by the elastic piece pushes the first pin and the second pin outwards, and the first pin and the second pin are respectively clamped in the slotted holes at the tail ends of the corresponding first steering racks.

Optionally, the end of the first steering rack is cylindrical, and the side wall is provided with a plurality of slots for being matched with pins of the electromagnetic switch pin.

Optionally, the second steering rack end is cylindrical, and is used for placing a power supply line, and is assembled concentrically with the first steering rack end.

Optionally, one or more electromagnetic switch pins are mounted on the second steering rack end.

Optionally, the mode switching component is disposed within a steering housing of an automobile steering gear.

Optionally, the method further comprises: and the rotation angle sensor is respectively connected with the first steering motor and the second steering motor.

A second aspect of the application provides a steering system comprising an automotive steering gear as described above.

A third aspect of the application provides a vehicle comprising a steering system as described above.

Therefore, the application has at least the following beneficial effects:

The steering system has the advantages that the mode switching part is arranged between the left steering motor and the right steering motor, the steering racks between the left steering motor and the right steering motor are separated or coupled through the mode switching part, the independent steering and the coupling steering of the left wheel and the right wheel are realized, the structure is simple, the large volume is not required to be occupied, the occupied space of the steering machine is small, the control switching part is contained in the steering machine shell, and the waterproof and dustproof performances are excellent. Therefore, the technical problems that in the related art, the volume of the switching control part of independent steering and coupling steering of the left and right wheels is large, the waterproof and dustproof requirements are high, the system components are difficult to fix, fatigue damage is easy to occur, and the like are solved.

Additional aspects and advantages of the application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the application.

Drawings

The foregoing and/or additional aspects and advantages of the application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:

FIG. 1 is a schematic illustration of an automotive steering gear provided in accordance with an embodiment of the present application;

FIG. 2 is a block diagram of an automotive steering gear provided in accordance with an embodiment of the present application;

FIG. 3 is a block diagram of a mode switching component provided in accordance with an embodiment of the present application;

Fig. 4 is an internal structural view of an electromagnetic switch pin provided according to an embodiment of the present application;

fig. 5 is a flowchart of a control method of an automobile steering gear according to an embodiment of the present application;

fig. 6 is a schematic flow chart of a control method and fault handling according to an embodiment of the present application.

Detailed Description

Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present application and should not be construed as limiting the application.

An automobile steering gear, a steering system and a vehicle according to an embodiment of the present application are described below with reference to the accompanying drawings. The application provides an automobile steering gear, which aims at the problems of independent steering and coupling steering modes of left and right wheels, wherein a mode switching part is arranged between left and right steering motors, steering racks between the left and right steering motors are separated or coupled through the mode switching part, the independent steering and coupling steering of the left and right wheels are realized, the structure is simple, a large volume is not required to be occupied, the occupied space of the steering gear is small, and the control switching part is contained in a steering shell and has excellent waterproof and dustproof performances. Therefore, the technical problems that in the related art, the volume of the switching control part of independent steering and coupling steering of the left and right wheels is large, the waterproof and dustproof requirements are high, the system components are difficult to fix, fatigue damage is easy to occur, and the like are solved.

Specifically, fig. 1 is a schematic structural diagram of an automobile steering gear according to an embodiment of the present application.

As shown in fig. 1, the automobile steering gear 10 includes: a first steering motor 100, a mode switching part 200, and a second steering motor 300.

Wherein the first steering motor 100 controls one-side wheel steering; the second steering motor 200 controls the steering of the other side wheel; the mode switching member 300 is provided to the first steering motor 100 and the second steering motor 200, and switches the steering rack separation or coupling between the first steering motor 100 and the second steering motor 200 to switch the both side wheels into the independent steering mode and the coupled steering mode.

It can be understood that, in the embodiment of the application, the mode switching component 300 is arranged between the left steering motor and the right steering motor, and the steering rack between the left steering motor and the right steering motor is separated or coupled by the mode switching component 300, so that the switching between the independent steering and the coupled steering of the left wheel and the right wheel is realized, the structure is simple, and the independent steering and the coupled steering of the left wheel and the right wheel can be realized without occupying a large volume.

As shown in fig. 2, the steering wheel and the steering column are identical to the conventional steering system. The steering device is provided with a set of steering motor and a steering angle sensor at the left and right sides, and the steering actions at the two sides can be controlled respectively in the independent steering mode of the left and right wheels. The first steering motor 100 is driven by a worm gear, the second steering motor 200 is driven by a parallel shaft reducer, and a set of steering motor power systems are arranged on two sides of the steering gear in the embodiment of the application, no special requirement is required for the driving type, and steering racks related to left and right wheels are not integrated, but are disconnected from the middle and comprise a set of switching components. The structure shown in fig. 2 is one possible arrangement, and is not particularly limited.

In an embodiment of the present application, the mode switching member 300 is disposed in a steering housing of an automobile steering gear.

It can be understood that the control switching component is arranged in the steering casing in the embodiment of the application, so that the waterproof and dustproof performances can be improved.

In the embodiment of the present application, the mode switching part 300 includes: an electromagnetic switch pin and a power supply circuit.

Wherein the electromagnetic switch pin is arranged at the tail end of a second steering rack of the second steering motor; the power supply circuit is electrically connected with the electromagnetic switch pin and supplies power to the electromagnetic switch pin; wherein, the electromagnetic switch pin is in a spring-open state when not electrified and is clamped in a slotted hole at the tail end of the first steering rack of the first steering motor 100, so that the steering racks at two sides are restrained from moving to enter a coupling steering mode; the electromagnetic switch pin is in a contracted state when being electrified and is contracted to the inner side of the tail end of the second steering rack, so that the steering racks on the two sides can independently move to enter an independent steering mode.

It can be understood that the embodiment of the application can be provided with the electromagnetic switch pin, and the electromagnetic switch pin is in a spring-open state when not electrified and is clamped in the slotted hole at the tail end of the first steering rack of the first steering motor, so that the steering racks at two sides are restrained from moving to enter a coupling steering mode; the electromagnetic switch pin is in a contracted state when being electrified and is contracted to the inner side of the tail end of the second steering rack, so that the steering racks on the two sides can move independently and enter an independent steering mode, and the proper steering mode is determined according to whether the electromagnetic switch pin is electrified or not.

In the embodiment of the application, the tail end of the first steering rack is cylindrical, and the side wall is provided with a plurality of slotted holes for being matched with pins of the electromagnetic switch pin.

In the embodiment of the application, the tail end of the second steering rack is cylindrical and is used for placing a power supply line and is concentrically assembled with the tail end of the first steering rack.

In an embodiment of the application, one or more electromagnetic switch pins are mounted on the second steering rack end.

Specifically, as shown in fig. 3, the end of the first steering rack is made into a cylinder shape, and the side wall is provided with a plurality of slots for matching pins. The second steering rack end is cylindrical with a small inner radius for placing the power supply line and is assembled concentrically with the first steering rack end. As shown in FIG. 4, a plurality of special electromagnetic switch pins are arranged on the tail end of the second steering rack, the electromagnetic switch pins are in a spring-open state when not electrified, and are clamped in slots on the tail end of the first steering rack, at the moment, the steering racks on the left side and the right side are restrained from moving, and the whole steering system is in a coupling steering mode. When the electromagnetic switch pin is electrified, the electromagnetic switch pin is in a contracted state, the pin body of the electromagnetic switch pin can contract to the inner side of the tail end of the second steering rack, at the moment, the steering racks on the left side and the right side can independently move, and the whole steering system is in a left-right wheel independent steering mode.

In an embodiment of the present application, an electromagnetic switch pin includes: the first pin, the second pin, the first electromagnet, the second electromagnet and the elastic element.

Wherein, the first electromagnet is connected with the first pin, the second electromagnet is connected with the second pin; the elastic piece is arranged between the first electromagnet and the second electromagnet, wherein when the electromagnetic switch pin is electrified, the first electromagnet and the second electromagnet attract each other to pull the first pin and the second pin inwards; when the electromagnetic switch pin is not electrified, the elastic force provided by the elastic piece pushes the first pin and the second pin outwards, and the first pin and the second pin are respectively clamped in the slotted holes at the tail ends of the corresponding first steering racks.

The elastic member may be a spring or the like.

It can be appreciated that in the embodiment of the application, an elastic element can be arranged between the first electromagnet and the second electromagnet, and when the electromagnetic switch pin is electrified, the first electromagnet and the second electromagnet attract each other to pull the first pin and the second pin inwards; when the electromagnetic switch pin is not electrified, the elastic force provided by the elastic piece pushes the first pin and the second pin outwards, the first pin and the second pin are respectively clamped in the corresponding slotted holes at the tail end of the first steering rack, and therefore when the steering motor or the mode switching part fails, the operation can be continued, and the steering of the vehicle is prevented from being out of control.

Specifically, as shown in fig. 4, the first pin and the second pin are each assembled with the electromagnet, and a spring is arranged between the two pins, when the electromagnet is not electrified, the electromagnet does not work, and the spring pushes the first pin and the second pin outwards, so that the whole body is in a spring-open state. When the power is on, the two electromagnets attract each other, the first pin and the second pin are pulled inwards against the elasticity of the spring, and the whole is in a contracted state. It should be noted that the electromagnet is not fixed, and the shape of the iron core and the winding mode can ensure that the electromagnet has enough attraction after being electrified.

In an embodiment of the present application, the method further includes: and the rotation angle sensor is respectively connected with the first steering motor and the second steering motor.

It can be understood that the corner sensor connected with the first steering motor and the second steering motor in the embodiment of the application can measure or monitor the rotation angle, improve the driving precision and stability, inhibit sudden steering or road condition emergency and improve the driving safety.

According to the automobile steering gear provided by the embodiment of the application, the mode switching part is arranged between the left steering motor and the right steering motor, the steering racks between the left steering motor and the right steering motor are separated or coupled through the mode switching part, so that the switching between independent steering and coupling steering of left wheels and right wheels is realized, the structure is simple, and a large volume is not required to be occupied, so that the occupied space of the steering gear is small, and the control switching part is contained in the steering gear shell, so that the waterproof and dustproof performances are excellent. Therefore, the technical problems that in the related art, the volume of the switching control part of independent steering and coupling steering of the left and right wheels is large, the waterproof and dustproof requirements are high, the system components are difficult to fix, fatigue damage is easy to occur, and the like are solved.

The embodiment of the application also provides a steering system which comprises the automobile steering gear.

The embodiment of the application also provides a vehicle comprising the steering system.

Next, a control method of an automobile steering gear according to an embodiment of the present application will be described with reference to the accompanying drawings.

Fig. 5 is a flowchart of a control method of an automobile steering gear according to an embodiment of the present application.

As shown in fig. 5, the control method of the automobile steering gear is used for the control of the automobile steering gear as above, and includes the steps of:

in step S101, a steering mode of the automobile steering gear is identified.

The steering mode may be an independent steering mode or a coupled steering mode.

In step S102, if the steering mode is the independent steering mode, the control mode switching means separates the steering rack between the first steering motor and the second steering motor.

It can be understood that when the steering mode is the independent steering mode, the steering rack between the motors can be separated by the control mode switching component, the turning radius of the vehicle and the ackerman steering trapezium can be adjusted in a larger range, and the steering angles of the left wheel and the right wheel are respectively controlled by the steering motors and the steering angle sensors at the left side and the right side, so that flexible steering is realized.

In some embodiments, when the automotive steering is in the independent steering mode, further comprising: detecting whether the electromagnetic switch pin of the mode switching part has a fault of losing magnetic force; and if the fault that the magnetic force is lost is detected to occur to the electromagnetic switch pin, switching the steering mode from the independent steering mode to the coupling steering mode.

It can be understood that the embodiment of the application can detect whether the electromagnetic switch pin has faults, and when the faults occur, the steering mode is switched from the independent steering mode to the coupling steering mode, so that the automatic execution of the transition mode can be ensured even if the faults occur.

Of course, in other embodiments, when the automotive steering is in the independent steering mode, further comprising: detecting whether any steering motor in the first steering motor and the second steering motor is faulty; and if any steering motor fault is detected, switching the steering mode from the independent steering mode to the coupling steering mode.

It can be appreciated that the embodiment of the application can detect whether the motor is faulty, and when any steering motor is faulty, the steering mode is switched from the independent steering mode to the coupled steering mode, so that the steering moment of a single motor or a driver can be used for controlling the steering motion of the vehicle.

In step S103, if the steering mode is the coupled steering mode, the control mode switching means couples the steering rack between the first steering motor and the second steering motor.

It can be understood that when the steering mode is the coupling steering mode, the embodiment of the application can control the mode switching component to couple the steering rack between the first steering motor and the second steering motor, so that the high-speed steering of the vehicle and the stability on a bumpy road surface can be ensured.

It should be noted that, in the embodiment of the present application, the steering racks between the first steering motor and the second steering motor are coaxial, and no additional torsion force is generated in the coupled steering mode, which helps to prolong the service life of the parts.

In an embodiment of the present application, when the automobile steering gear is in the coupled steering mode, the method further includes: detecting whether any steering motor in the first steering motor and the second steering motor is faulty; if any steering motor fault is detected, stopping the output of the steering motor with the fault.

It can be understood that the embodiment of the application can detect whether any steering motor fails, and when the failure occurs, the output of the failed steering motor is stopped, and the driver directly controls the steering of the vehicle to prevent the steering of the vehicle from being out of control.

The control method and fault handling provided by the embodiments of the present application will be described in detail by specific embodiments, as shown in fig. 6, specifically as follows:

1. Left and right wheels are in independent steering mode, and steering racks related to the wheels at two sides are separated. At the moment, the turning radius and the Ackerman steering trapezium of the vehicle can be adjusted in a larger range, and the steering motors and the steering angle sensors on the left side and the right side respectively control the steering angles of the left wheel and the right wheel, so that flexible steering is realized.

2. The embodiment of the application has fault tolerance capability. In the independent steering mode of the left and right wheels, if the electromagnetic switch pin fails, the pin body loses magnetism and is in a spring-open state, so that the pin body slides on the inner wall of the tail end of the steering rack until the pin body reaches the slot hole of the tail end of the steering rack, the mechanism can be automatically clamped, the coupling steering mode is changed, the process can be automatically executed even if the circuit of the switching component fails, and the control algorithm is switched into the coupling steering mode when the failure is detected. In the independent steering mode of the left and right wheels, if a failure of the steering motor occurs, a control command is applied to cause the system to shift to the coupled steering mode, so that the steering motion of the vehicle can be controlled with the steering torque of the single motor or the driver.

3. In the coupling steering mode, if no fault exists, a dual-motor synchronous control strategy is adopted to jointly output steering torque, and the redundant backup characteristic is achieved; if a single motor fails, adopting a degradation strategy to stop the output of the failed motor, and outputting torque by the normal steering motor, wherein the system has no redundancy backup capability; if both motors fail, the torque output of both motors needs to be stopped, at which point the vehicle steering needs to be controlled by the driver.

In summary, the embodiment of the application can switch between independent steering and coupling steering modes of the left and right wheels, and compared with the prior art, the application has smaller occupied space and better waterproof and dustproof capabilities, and designs fault-tolerant treatment measures of the system under the condition of faults.

It should be noted that the foregoing explanation of the embodiment of the steering device of the automobile is also applicable to the control method of the steering device of the automobile of this embodiment, and will not be repeated here.

According to the control method of the automobile steering gear, the mode switching part is arranged between the left steering motor and the right steering motor, the steering racks between the left steering motor and the right steering motor are separated or coupled through the mode switching part, the independent steering and the coupling steering of the left wheels and the right wheels are realized, the structure is simple, the occupied space of the steering gear is small, the control switching part is contained in the steering shell, the waterproof and dustproof performance is excellent, the fault tolerance capability is realized, when the steering motor or the mode switching part fails, the mode switching part can be safely converted into the coupling steering mode, no extra torsion force is generated, the steering of a vehicle is prevented from being out of control, and the service life of parts is prolonged. Therefore, the problems that in the related art, the volume of the switching control part of independent steering and coupling steering of the left wheel and the right wheel is large, the waterproof and dustproof requirements are high, the system components are difficult to fix, fatigue damage is easy to occur, and the like are solved.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or N embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, "N" means at least two, for example, two, three, etc., unless specifically defined otherwise.

Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and additional implementations are included within the scope of the preferred embodiment of the present application in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order from that shown or discussed, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present application.

It is to be understood that portions of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above-described embodiments, the N steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. As with the other embodiments, if implemented in hardware, may be implemented using any one or combination of the following techniques, as is well known in the art: discrete logic circuits having logic gates for implementing logic functions on data signals, application specific integrated circuits having suitable combinational logic gates, programmable gate arrays, field programmable gate arrays, and the like.

Those of ordinary skill in the art will appreciate that all or a portion of the steps carried out in the method of the above-described embodiments may be implemented by a program to instruct related hardware, where the program may be stored in a computer readable storage medium, and where the program, when executed, includes one or a combination of the steps of the method embodiments.

While embodiments of the present application have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the application, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the application.

Claims (10)

1. An automotive steering gear, comprising:

The first steering motor is connected with one side of the wheel through a first transmission mechanism;

the second steering motor is connected with the wheel on the other side through a second transmission mechanism;

And the mode switching component is arranged between the first steering motor and the second steering motor and is used for switching the steering racks between the first steering motor and the second steering motor to be separated or coupled so as to switch the wheels at two sides to enter an independent steering mode and a coupling steering mode.

2. The automobile steering gear according to claim 1, wherein the mode switching means includes:

An electromagnetic switch pin disposed on a second steering rack end of the second steering motor;

The power supply circuit is electrically connected with the electromagnetic switch pin and supplies power to the electromagnetic switch pin; wherein,

The electromagnetic switch pin is in a spring-open state when not electrified and is clamped in a slotted hole at the tail end of a first steering rack of the first steering motor, so that the steering racks at two sides are restrained from moving to enter the coupling steering mode; the electromagnetic switch pin is in a contracted state when being electrified and is contracted to the inner side of the tail end of the second steering rack, so that the steering racks on two sides can independently move to enter the independent steering mode.

3. The automobile steering gear according to claim 2, wherein the electromagnetic switch pin includes:

A first pin and a second pin;

A first electromagnet connected to the first pin and a second electromagnet connected to the second pin;

an elastic member disposed between the first electromagnet and the second electromagnet, wherein,

When the electromagnetic switch pin is electrified, the first electromagnet and the second electromagnet attract each other to pull the first pin and the second pin inwards; when the electromagnetic switch pin is not electrified, the elastic force provided by the elastic piece pushes the first pin and the second pin outwards, and the first pin and the second pin are respectively clamped in the slotted holes at the tail ends of the corresponding first steering racks.

4. The automobile steering gear according to claim 2, wherein the first steering rack is cylindrical at the end, and a plurality of slots are formed in the side wall for engaging pins of the electromagnetic switch pin.

5. The automotive steering gear according to claim 2, wherein the second steering rack end is cylindrical for placing a power supply line, assembled concentrically with the first steering rack end.

6. The automotive steering gear of claim 2, wherein the second steering rack end has one or more electromagnetic switch pins mounted thereon.

7. The automobile steering gear according to claim 1, wherein the mode switching member is provided in a steering housing of the automobile steering gear.

8. The automobile steering gear according to claim 1, further comprising:

and the rotation angle sensor is respectively connected with the first steering motor and the second steering motor.

9. A steering system comprising an automotive steering gear according to any one of claims 1-8.

10. A vehicle comprising a steering system according to claim 9.