CN114212144A

CN114212144A - Vehicle steering system

Info

Publication number: CN114212144A
Application number: CN202111404415.1A
Authority: CN
Inventors: 李丰军; 周剑光; 高先哲
Original assignee: China Automotive Innovation Co Ltd
Current assignee: China Automotive Innovation Co Ltd
Priority date: 2021-11-24
Filing date: 2021-11-24
Publication date: 2022-03-22

Abstract

The present application relates to the field of vehicle control, and more particularly to a vehicle steering system; the device comprises a steering wheel component, a vehicle body fixing part, a torque transmission mechanism, a rotation information acquisition device and a road feel simulation driving device; the rotation information acquisition device is connected with the torque transmission mechanism, the road feel simulation driving device is in driving connection with the torque transmission mechanism, and the rotation information acquisition device and the road feel simulation driving device are respectively in communication connection with the controller; the torque transmission mechanism is respectively connected with the vehicle body fixing piece and the steering wheel assembly, and the road feel simulation driving device is arranged to respond to a driving control instruction, operate based on driving operation parameters and drive the torque transmission mechanism to rotate so as to output road feel simulation torque to the steering wheel assembly through the torque transmission mechanism; the vehicle steering system in this application can make controller and vehicle steering system realize the road feel analog function through setting up moment of torsion transmission mechanism, rotation information acquisition device and road feel analog drive device, promotes the driver and uses and feels.

Description

Vehicle steering system

Technical Field

The present application relates to the field of vehicle control, and more particularly to a vehicle steering system.

Background

With the continuous development of the electronic control technology of automobiles, the intelligent automatic driving technology gradually receives the market attention, and the steer-by-wire technology is one of the important technologies for realizing the intelligent driving of vehicles. The steer-by-wire system is different from the existing electronic power-assisted steering system in that the connection relationship between a steering device in a cab and a steering gear in an engine compartment is changed from mechanical connection into electronic connection, and the accurate steering control of a vehicle is realized through a current state signal sent by a processor.

However, the parts of the steer-by-wire device in the prior art are numerous, and the layout is disordered, and the sliding of the steering wheel relative to the vehicle body is often realized by adopting a rack-and-pinion or lead screw nut mechanism, so that the size of the steering device is large, the mechanism is complicated, the whole structure is not compact enough, and the intelligent driving requirement cannot be met.

The road feel function means that a driver can feel road resistance through a steering wheel in the steering process of the vehicle. Because the steer-by-wire system is no longer mechanically connected with the wheels, the driver cannot feel the road resistance through the steering wheel, and the driving hand feeling of the driver is further influenced.

Disclosure of Invention

To the above-mentioned problem of prior art, this application provides a vehicle steering system, through setting up moment of torsion transmission mechanism, rotation information acquisition device and road feel simulation drive arrangement, and then can make controller and vehicle steering system realize the road feel simulation function, and the simulation vehicle turns to the road surface driving resistance of in-process to promote the driver and use and feel.

In one aspect, the present application provides a vehicle steering system comprising a steering wheel assembly and a body mount for fixed connection with a body of a vehicle; it is characterized by also comprising: the system comprises a torque transmission mechanism, a rotation information acquisition device and a road feel simulation driving device;

the rotation information acquisition device is connected with the torque transmission mechanism, the road feel simulation driving device is in driving connection with the torque transmission mechanism, and the rotation information acquisition device and the road feel simulation driving device are respectively in communication connection with the controller;

the torque transmission mechanism is respectively connected with the vehicle body fixing piece and the steering wheel assembly; the torque transmission mechanism is arranged to rotate with the rotation of the steering wheel assembly, so as to generate rotation information;

the rotation information acquisition device is arranged to detect the rotation information generated by the torque transmission mechanism and send the rotation information to the controller, so that the controller generates a corresponding drive control instruction based on the rotation information and the current road surface information and sends the drive control instruction to the road feel simulation drive device; the drive control instruction carries drive operation parameters;

the road feel simulation driving device is configured to respond to the driving control instruction, operate based on the driving operation parameters and drive the torque transmission mechanism to rotate so as to output road feel simulation torque to the steering wheel component through the torque transmission mechanism.

Specifically, the vehicle steering system further comprises a telescopic adjusting assembly, the telescopic adjusting assembly is respectively connected with the steering wheel assembly and the vehicle body fixing piece, and the telescopic adjusting assembly is arranged to drive the steering wheel assembly to move in a reciprocating mode relative to the vehicle body fixing piece along the axial direction of the steering wheel assembly.

Specifically, the torque transmission mechanism includes a torque input shaft, a torque output shaft, and a torque transmission torsion bar;

the torque input shaft is in transmission connection with the steering wheel assembly and is arranged to rotate along with the rotation of the steering wheel assembly; the torque transmission torsion bar is in transmission connection with the torque input shaft and the torque output shaft respectively.

Specifically, the rotation information acquisition device comprises a first signal acquisition mechanism and a second signal acquisition mechanism, wherein the first signal acquisition mechanism and the second signal acquisition mechanism are coaxially arranged;

the first signal acquisition mechanism is sleeved on the torque input shaft and rotates synchronously with the torque input shaft;

the second signal acquisition mechanism is sleeved on the torque output shaft and synchronously rotates with the torque output shaft; the second signal acquisition mechanism is configured to detect the rotational information generated by the torque transfer mechanism and send the rotational information to the controller.

Specifically, the steering wheel assembly comprises a steering wheel and a steering shaft, the steering shaft is in transmission connection with the steering wheel and the torque input shaft respectively, and the steering shaft is arranged to rotate along with the rotation of the steering wheel and drive the torque input shaft to rotate.

Specifically, flexible adjusting part still includes steering column and flexible guide structure, steering column cover is located outside the steering spindle, steering column respectively with automobile body mounting with flexible guide structure sliding connection.

Specifically, flexible adjusting part still includes flexible adjusting drive arrangement, flexible adjusting drive arrangement with automobile body mounting fixed connection, flexible adjusting drive arrangement is set up to the drive flexible guide structure rotates, in order to drive to go up the tube column for automobile body mounting reciprocating motion, and then drive the steering spindle is followed the axial reciprocating motion of steering spindle.

Specifically, the steering upper pipe column and the vehicle body fixing part are provided with a guide limiting block, one guide limiting block is provided with a guide limiting groove matched with the guide limiting block, and the guide limiting block is connected with the guide limiting groove in a sliding mode.

Specifically, turn to the upper limb with in the flexible guide structure alternative be equipped with flexible regulating block, another be equipped with flexible regulating block assorted flexible adjustment tank, flexible regulating block with flexible adjustment tank sliding connection.

Specifically, vehicle steering system still includes signal integrator, signal integrator's one end respectively with flexible regulation drive arrangement, rotate information acquisition device with road feel simulation drive arrangement communication connection, the other end of signal integrator with controller communication connection.

Based on above-mentioned technical scheme, the vehicle steering system that this application provided has following beneficial effect:

1. the application provides a pair of vehicle steering system, through setting up torque transfer mechanism, rotation information acquisition device and road feel simulation drive arrangement, and then can make controller and vehicle steering system realize road feel simulation function, the resistance is driven on the road surface of simulation vehicle steering in-process to promote the driver and use and feel.

2. The application provides a vehicle steering system, through the flexible adjusting part that sets up, can be in drive-by-wire's the condition at the vehicle under, according to driver's demand adjustment steering wheel subassembly's position, promote user's driving comfort.

3. The application provides a vehicle steering system, through the flexible adjusting part that sets up, can be in the condition of autopilot state at the vehicle, with the shrink of steering wheel subassembly, and then provide more activity spaces for the driver.

4. The application provides a pair of vehicle steering system, through the signal integrator that sets up, collects vehicle steering system's electrical interface to a department and concentrates the signal exchange, avoids many places to connect and the wiring that causes is in disorder, makes things convenient for the inside structural layout of vehicle steering system, reduces exposed plug-in components, and then can make vehicle steering system structure regular succinct.

Drawings

In order to more clearly illustrate the technical solution of the present application, the drawings used in the description of the embodiment or the prior art will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the application, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

FIG. 1 is a schematic structural diagram of a vehicle steering system provided in an embodiment of the present application;

FIG. 2 is a schematic view of a portion of a telescopic adjustment assembly in a vehicle steering system according to an embodiment of the present disclosure;

FIG. 3 is a schematic diagram of a partial structure of a vehicle steering system provided in an embodiment of the present application;

FIG. 4 is a schematic diagram of a second partial structure of a telescopic adjustment assembly in a vehicle steering system according to an embodiment of the present disclosure;

FIG. 5 is a schematic diagram of a third partial structure of a telescopic adjustment assembly in a vehicle steering system according to an embodiment of the present disclosure;

FIG. 6 is a schematic structural diagram of a road feel simulation module of a vehicle steering system according to an embodiment of the present disclosure;

FIG. 7 is a schematic cross-sectional view of FIG. 6;

fig. 8 is a schematic structural diagram of a signal integrator of a vehicle steering system according to an embodiment of the present application.

Wherein, 1-a steering wheel component, 11-a steering wheel, 12-a steering shaft, 2-a vehicle body fixing component, 3-a torque transmission mechanism, 31-a torque input shaft, 32-a torque output shaft, 33-a torque transmission torsion bar, 34-a lubricating bush, 4-a rotation information acquisition device, 41-a first signal acquisition mechanism, 42-a second signal acquisition mechanism, 5-a road feeling simulation driving device, 51-a mounting hole, 6-a telescopic adjustment component, 61-a steering upper pipe column, 62-a telescopic guide structure, 63-a telescopic adjustment driving device, 64-a telescopic adjustment block, 65-a telescopic adjustment groove, 66-a soft limiting block, 67-a bearing mounting interface, 68-a motor mounting interface and 7-a guide limiting block, 8-a first bearing, 9-a signal integrator, 91-an electrical interface of a telescopic adjusting driving device, 92-an electrical interface of a rotating information acquisition device, 93-an electrical interface of a road sensing analog driving device, 94-an electrical interface of a controller and 10-a second bearing.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic may be included in at least one implementation of the present application. In the description of the present application, it is to be understood that the terms "upper", "lower", "left", "right", "top", "bottom", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the system or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be taken as limiting the present application. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. Moreover, the terms "first," "second," and the like are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.

Before further detailed description of the embodiments of the present application, terms and expressions referred to in the embodiments of the present application will be described, and the terms and expressions referred to in the embodiments of the present application will be used for the following explanation.

The steer-by-wire technology is based on the traditional steering technology, the connection relationship between a steering column and a steering gear in an engine compartment is changed from mechanical connection into electronic connection, the steering intention of a driver is transmitted to a controller through an electric signal, and then the steering of a vehicle is controlled, and the steer-by-wire technology is one of important technologies for realizing intelligent driving of the vehicle. In the steer-by-wire technology, the vehicle can be in a drive-by-wire mode, i.e., a mode in which the user actually controls the steering of the vehicle by controlling the steering wheel, or an automatic driving mode, i.e., a mode in which the vehicle controls the steering of the vehicle by the controller.

The following describes a vehicle steering system provided by an embodiment of the present application, which may be applied to a vehicle with an automatic driving function, and specifically, may include a steering wheel assembly 1 and a body mount 2, where the body mount 2 is configured to be fixedly connected to a body of the vehicle; the device also comprises a torque transmission mechanism 3, a rotation information acquisition device 4 and a road feel simulation driving device 5;

the rotation information acquisition device 4 is connected with the torque transmission mechanism 3, the road feel simulation driving device 5 is in driving connection with the torque transmission mechanism 3, and the rotation information acquisition device 4 and the road feel simulation driving device 5 are respectively in communication connection with the controller;

the torque transmission mechanism 3 is respectively connected with the vehicle body fixing piece 2 and the steering wheel component 1; the torque transfer mechanism 3 is arranged to rotate with rotation of the steering wheel assembly 1, thereby generating rotation information;

in the embodiment of the present application, the steering wheel assembly 1 includes a steering wheel 11 and a steering shaft 12, the steering shaft 12 is in transmission connection with the steering wheel 11 and the torque transmission mechanism 3, respectively, and the torque transmission mechanism 3 may rotate based on a steering torque generated by the rotation of the steering wheel 11;

specifically, the operation of the user to turn the steering wheel 11 rotates the steering wheel 11, and the steering torque generated by the steering wheel 11 is transmitted to the torque transmitting mechanism 3 via the steering shaft 12.

The rotation information acquisition device 4 is arranged to detect rotation information generated by the torque transmission mechanism 3 and send the rotation information to the controller, so that the controller generates a corresponding drive control instruction based on the rotation information and current road surface information and sends the drive control instruction to the road feel simulation driving device 5; the drive control command carries a drive operation parameter; the road feel simulation driving device 5 is configured to operate based on the driving operation parameters in response to the driving control instruction, and drive the torque transmission mechanism 3 to rotate so as to output road feel simulation torque to the steering wheel assembly 1 through the torque transmission mechanism 3, thereby being capable of realizing a road feel simulation function; wherein the drive operating parameters may include, but are not limited to, drive rotational rate and drive rotational direction; the road feel simulation torque may be a torque corresponding to the current road resistance calculated by the controller. According to the road feel simulation system, the controller is used for calculating the driving control instruction corresponding to the road feel simulation torque, the road feel simulation driving device 5 is used for generating the road feel simulation torque based on the driving control instruction and reversely transmitting the road feel simulation torque to a user through the torque transmission mechanism 3 and the steering wheel assembly 1, so that the user feels the road feel simulation torque and further feels the current road resistance.

In the present embodiment, the torque transmission mechanism 3 includes a torque input shaft 31, a torque output shaft 32, and a torque transmission torsion bar 33; the torque input shaft 31 is in transmission connection with the steering wheel assembly 1 and is arranged to rotate along with the rotation of the steering wheel assembly 1; the torque transmission torsion bar 33 is in driving connection with the torque input shaft 31 and the torque output shaft 32, respectively.

In the embodiment of the present application, the steering shaft 12 is in transmission connection with the steering wheel 11 and the torque input shaft 31, specifically, the steering shaft 12 is sleeved at one end of the torque input shaft 31 and can drive the torque input shaft 31 to rotate coaxially;

further, the steering shaft 12 and the torque input shaft 31 are connected by a spline, and the steering shaft 12 is configured to rotate with the rotation of the steering wheel 11 and rotate the torque input shaft 31.

In the embodiment of the present application, as shown in fig. 7, one end of the torque transmission torsion bar 33 extends into the inner cavity of the torque input shaft 31, and the other end of the torque transmission torsion bar 33 extends into the inner cavity of the torque output shaft 32; the torque input shaft 31, the torque transmission torsion bar 33 and the torque output shaft 32 are coaxially connected; the torque transmission torsion bar 33 is respectively connected with the torque input shaft 31 and the torque output shaft 32 in an interference fit manner; according to the torque transmission device, two ends of a torque transmission torsion bar 33 are respectively embedded into an inner cavity of a torque input shaft 31 and an inner cavity of a torque output shaft 32, the torque transmission torsion bar 33 is an elastic torsion bar, and after steering torque generated by a steering wheel 11 is sequentially transmitted to a steering shaft 12 and the torque input shaft 31, the torque transmission torsion bar 33 can rotate based on the rotation torque transmitted by the torque input shaft 31, so that the torque transmission torsion bar 33 generates slight elastic deformation and drives the torque output shaft 32 to rotate.

Further, a difference is generated in the rotational torque of the torque input shaft 31 and the torque output shaft 32 based on the elastic deformation of the torque transmission torsion bar 33, thereby causing a difference in the rotational angle of the torque input shaft 31 and the torque output shaft 32. The controller calculates road feel simulation torque based on the difference generated by the rotation angle and the current road surface resistance and other parameters, and generates a driving control instruction carrying driving operation parameters.

Specifically, the length of the torque transmission torsion bar 33 extending into the torque input shaft 31 coincides with the length of the torque output shaft 32; the torque output shaft 32 is provided with an installation notch, and the other end of the torque input shaft 31 is inserted into the installation notch and connected with the torque output shaft 32 through a lubrication bush 34. When the steering wheel assembly 1 rotates, the torque input shaft 31 and the torque output shaft 32 rotate relatively, and the lubrication bush 34 can reduce the friction force generated by the torque input shaft 31 and the torque output shaft 32 due to the relative rotation.

In the embodiment of the present application, after the rotation information acquisition device 4 detects the rotation information generated by the torque transmission mechanism 3, the rotation information is sent to the controller, so that the controller generates a corresponding driving control instruction based on the rotation information and the current road surface information, and sends the driving control instruction to the road feel simulation driving device 5.

In the embodiment of the present application, the rotation information acquiring apparatus 4 includes a first signal acquiring mechanism 41 and a second signal acquiring mechanism 42, and the first signal acquiring mechanism 41 and the second signal acquiring mechanism 42 are coaxially arranged;

the first signal acquisition mechanism 41 is sleeved on the torque input shaft 31 and rotates synchronously with the torque input shaft 31;

the second signal collecting mechanism 42 is sleeved on the torque output shaft 32 and rotates synchronously with the torque output shaft 32; the second signal acquisition mechanism 42 is configured to detect rotational information generated by the torque-transmitting mechanism 3 and send the rotational information to the controller.

Specifically, one end of the second signal collecting mechanism 42 is sleeved on the torque output shaft 32, and the other end of the second signal collecting mechanism 42 is sleeved outside the first signal collecting mechanism 41 and spaced from the first signal collecting mechanism 41; the second signal acquisition mechanism 42 is communicatively coupled to the controller.

In the embodiment of the present application, the rotation information may include a first torque of the torque input shaft 31, a second torque of the torque output shaft 32, and a relative rotation angle of the torque input shaft 31 and the torque output shaft 32.

Specifically, the relative rotation angle of the first signal acquisition mechanism 41 and the second signal acquisition mechanism 42 can be obtained based on a processing module arranged on the second signal acquisition mechanism 42; so that the second signal acquisition mechanism 42 calculates the rotation information according to the relative rotation angle of the first signal acquisition mechanism 41 and the second signal acquisition mechanism 42.

The processing modules are at least two, and the application acquires a plurality of groups of rotation information by arranging the processing modules so as to realize a data backup function and enable the vehicle steering system to be safer and more stable.

In particular, the rotational information acquisition device 4 may be a redundant sensor.

In another embodiment of the present application, the relative rotation angle of the first signal collecting mechanism 41 and the second signal collecting mechanism 42 collected by the processing module may be directly sent to the controller, so that the controller performs calculation based on the relative rotation angle to obtain the rotation information.

In the embodiment of the application, after the controller receives the rotation information sent by the rotation information acquisition device 4, the controller controls the steering of the vehicle based on the acquired rotation information and the current vehicle state, and meanwhile, the controller calculates and generates a corresponding driving control instruction based on the rotation information and the current road surface information, and sends the driving control instruction to the road feel simulation driving device 5; so that the road-feel analogue drive means 5 drives the torque output shaft 32 to rotate.

Specifically, the current vehicle state and current road surface information are parameters that are detected by other sensors on the automobile and transmitted to the controller; wherein the current vehicle state includes, but is not limited to, a current vehicle speed and a current vehicle tire state, and the current road surface information includes, but is not limited to, a current road surface friction. And the controller sends the calculated drive control finger carrying the drive operation parameters to the road sense simulation driving device 5.

In the embodiment of the present application, the road-feel simulation driving device 5 operates based on the driving operation parameters in the received driving control command, and drives the torque output shaft 32 to rotate, wherein the rotation direction of the torque output shaft 32 is opposite to the rotation direction of the rotation torque of the steering wheel assembly 1. Based on this, the road feel simulation torque generated by the rotation of the torque output shaft 32 is in the opposite direction to the steering torque generated by the rotation of the steering wheel assembly 1. The road feel simulation torque is transmitted to the torque output shaft 31 through a torque transmission torsion bar 33 arranged in the torque output shaft 32, and then is transmitted to the steering shaft 12 and the steering wheel 11 in sequence; so that the driver feels the simulated road surface resistance through the road feel simulation torque on the steering wheel 11 to improve the use feel of the driver.

In the embodiment of the present application, as shown in fig. 6, the road-sensing analog driving device 5 may be a hollow motor, and the torque output shaft 32 is inserted into the hollow motor and then coaxially connected to the hollow motor. The hollow motor is provided with a plurality of mounting holes 51, and the hollow motor can be fixedly connected with the vehicle body fixing part 2 after penetrating through the mounting holes 51 through screws or bolts. In the case of rotation of the hollow motor, the torque output shaft 32 rotates with the rotation of the hollow motor. The hollow motor is provided with at least two groups of stator windings, and the working backup function of the motor can be realized by arranging a plurality of groups of stator windings. When the working stator winding is damaged, any other stator winding can work instead of the damaged stator winding so as to ensure the normal operation of the vehicle steering system. For example, the hollow motor is provided with a first stator winding and a second stator winding, and when the first stator winding is damaged so that the hollow motor cannot normally operate, the second stator winding replaces the first stator winding to enable the hollow motor to normally operate.

In this application embodiment, integrated with position sensor on the hollow motor, position sensor is used for detecting the rotational speed of motor and the corner signal of motor, and the controller can be based on motor speed and motor corner signal to judge the running state of motor, and adjust the operation of motor according to actual conditions, and then improve the regulation and control precision of controller to the hollow motor.

In the embodiment of the present application, the vehicle steering system further includes a telescopic adjusting assembly 6, the telescopic adjusting assembly 6 is respectively connected to the steering wheel assembly 1 and the vehicle body fixing member 2, and the telescopic adjusting assembly 6 is configured to drive the steering wheel assembly 1 to move back and forth relative to the vehicle body fixing member 2 along the axial direction of the steering wheel assembly 1.

In the embodiment of the present application, the telescopic adjusting assembly 6 further includes a steering upper column 61 and a telescopic guiding structure 62, the steering upper column 61 is sleeved outside the steering shaft 12, and the steering upper column 61 is slidably connected to the body mount 2 and the telescopic guiding structure 62 respectively.

In the embodiment of the present application, the telescopic adjusting assembly 6 further includes a telescopic adjusting driving device 63, the telescopic adjusting driving device 63 is fixedly connected to the vehicle body fixing member 2, and the telescopic adjusting driving device 63 is configured to drive the telescopic guiding structure 62 to rotate so as to drive the steering upper pipe column 61 to reciprocate relative to the vehicle body fixing member 2, and further drive the steering shaft 12 to reciprocate along the axial direction of the steering shaft 12.

In this application embodiment, turn to upper tube post 61 and flexible guide structure 62 parallel arrangement, flexible guide structure 62 and flexible adjusting drive arrangement 63 coaxial coupling, specifically, flexible guide structure 62 can be through bearing and shaft coupling and flexible adjusting drive arrangement 63 coaxial coupling, and then can guarantee that vehicle steering system inner structure is regular, and then practice thrift vehicle steering system's the space of arranging, reduces vehicle steering system installation and arranges the degree of difficulty.

In this application embodiment, turn to in upper tube post 61 and automobile body mounting 2 the alternative be equipped with direction stopper 7, another be equipped with 7 assorted direction spacing grooves of direction stopper, direction stopper 7 with direction spacing groove sliding connection. Specifically, when the steering upper tube 61 reciprocates relative to the vehicle body mount 2, the guide stopper 7 reciprocates in the guide stopper groove.

In the embodiment of the present application, one of the upper tubular column 61 and the telescopic guide structure 62 is provided with a telescopic adjusting block 64, and the other is provided with a telescopic adjusting groove 65 matched with the telescopic adjusting block 64, and the telescopic adjusting block 64 is slidably connected with the telescopic adjusting groove 65. Specifically, when the telescopic guide 62 is rotated, the telescopic adjustment block 64 slides in the telescopic adjustment groove 65 to reciprocate the steering upper column 61 relative to the torque transmission mechanism 3.

In the embodiment of the application, one side of the upper steering pipe column 61 is welded with the telescopic adjusting block 64, and the other side is welded with the guide limiting block 7. The telescopic adjusting driving device 63 can be a rotating motor, the telescopic guiding structure 62 can be a cylindrical cam, one end of the cylindrical cam is provided with a bearing installation interface 67 for being fixedly installed on the vehicle body fixing part 2 after being connected with a bearing, and the other end of the cylindrical cam is provided with a motor installation interface 68 for being coaxially connected with the rotating motor through the bearing and a coupler. The cylindrical cam is provided with a spiral telescopic adjusting groove 65, and when the cylindrical cam rotates, the telescopic adjusting block 64 moves along with the spiral telescopic adjusting groove 65 and drives the steering shaft protection tube 61 and the steering shaft 12 to move relative to the vehicle body fixing piece 2. Meanwhile, the guide limiting block 7 slides on a linear guide limiting groove arranged on the vehicle body fixing part 2, and is used for guiding the steering shaft protection pipe 61 to move axially relative to the vehicle body fixing part 2, when the steering wheel assembly 1 rotates, the guide limiting groove limits the telescopic guide structure 62, and further limits the steering shaft protection pipe 61, the steering shaft protection pipe 61 is prevented from rotating along with the rotation of the steering shaft 12, and the stable motion between the steering shaft protection pipe 61 and the vehicle body fixing part 2 is ensured during telescopic adjustment. The telescopic adjusting assembly 6 adopts a cylindrical cam mechanism to realize the relative movement of the steering wheel assembly 1 relative to the vehicle body fixing part 2, and can ensure the regularity and tidiness of the internal space of the vehicle steering column system under the condition of compact structure.

In this application embodiment, flexible adjustment tank 65 and direction spacing groove can be the bar groove of other shapes, can realize different flexible regulation strokes through the curve that changes flexible adjustment tank 65. The soft limiting block 66 is arranged at the tail end of the telescopic adjusting groove 65, so that vibration and noise generated when the telescopic adjusting block 64 slides to the tail end of the telescopic adjusting groove 65 can be reduced, and the use comfort of a user is improved.

In the embodiment of the present application, the vehicle steering control system further includes a signal integrator 9, one end of the signal integrator 9 is in communication connection with the telescopic adjustment driving device 63, the rotation information collecting device 4 and the road feel simulation driving device 5, respectively, and the other end of the signal integrator 9 is in communication connection with the controller.

In the embodiment of the present application, the signal integrator 9 is configured to transmit the operation data generated by the telescopic adjustment driving device 63, the rotation information collecting device 4, and the road sensing simulation driving device 5 to the controller; the controller can control the vehicle to steer and generate a driving control instruction for controlling the rotation of the road sense simulation driving device 5 based on the operation data of the rotation information acquisition device 4; the controller can also monitor the running states of the telescopic adjusting driving device 63 and the road feel simulation driving device 5 based on the running data of the telescopic adjusting driving device 63 and the road feel simulation driving device 5, so as to avoid equipment faults; and can produce the control command of the running state of regulating the flexible regulating drive unit 63 and road feel analog drive unit 5 according to the actual conditions; the controller sends control instructions corresponding to the telescopic adjustment driving device 63, the rotation information acquisition device 4 and the road feel simulation driving device 5 to the signal integrator 9;

in the embodiment of the present application, the signal integrator 9 is further configured to transmit the control command to the telescopic adjustment driving device 63 and the road sensing simulation driving device 5 respectively; to control or adjust the operation of the telescopic adjusting driving device 63 and the road sense simulation driving device 5; the vehicle steering system in this application can collect vehicle steering system's electric interface to a department and concentrate signal exchange based on above-mentioned information transfer and control relation, avoids many places to connect and the wiring that causes is in disorder, makes things convenient for the inside structural layout of vehicle steering system, reduces exposed plug-in components, and then can make vehicle steering system structure regular succinct.

In the embodiment of the present application, the signal integrator 9 is provided with an electrical interface 91 of the telescopic adjustment driving device for communicating with the telescopic adjustment driving device 63, the signal integrator 9 is further provided with an electrical interface 92 of the rotation information acquisition device for communicating with the rotation information acquisition device 4, the signal integrator 9 is further provided with an electrical interface 93 of the road sensing simulation driving device for communicating with the road sensing simulation driving device 5, and the signal integrator 9 is further provided with an electrical interface 94 of the controller for communicating with the controller;

specifically, the telescopic adjustment driving device 63 is in communication connection with the controller through a telescopic adjustment driving device electrical interface 91 and a controller electrical interface 94; the rotation information acquisition device 4 is in communication connection with the controller through a rotation information acquisition device electrical interface 92 and a controller electrical interface 94; the road-sensing analog driving device 5 is in communication connection with the controller through a road-sensing analog driving device electrical interface 93 and a controller electrical interface 94.

In the present embodiment, the steering upper column 61 is connected to the steering shaft 12 via the first bearing 8, and the torque output shaft 32 is connected to the body mount 2 via the second bearing 10.

Specifically, the first bearing 8 is sleeved on the steering shaft 12 so that the steering shaft 12 can rotate relative to the steering shaft protection pipe; the second bearing 10 is sleeved on the torque output shaft 32 so that the torque output shaft 32 can rotate relative to the vehicle body fixing member 2.

In the embodiment of the present application, as shown in fig. 1, the vehicle body fixing member 2 may be a pipe column device, and specifically, when being set, the torque transmission mechanism 3, the rotation information acquisition device 4, the road feel simulation driving device 5, the telescopic guide structure 62, and the telescopic adjustment driving device 63 may be disposed inside the pipe column device; above-mentioned mode of setting up can avoid moment of torsion transmission mechanism 3, rotate information acquisition device 4, way feel simulation drive arrangement 5, flexible guide structure 62 and flexible adjusting drive arrangement 63 receive outside collision and the damage that causes, can make vehicle steering system inside install respectively or adjust according to the installation function module simultaneously, above-mentioned design can make steering system's size obviously reduce, structural layout is simple, and then be favorable to the platformization to practice thrift development and manufacturing cost.

As shown in fig. 1 to 8, in the embodiment of the present application, the operation principle of the vehicle steering control system is as follows:

the driver can select the driving mode of vehicle through button, modes such as acoustic control, when selecting vehicle automatic driving mode, the controller sends out the control command of control flexible regulation drive arrangement 63, this control command transmits to flexible regulation drive arrangement 63 behind signal integrator 9, flexible regulation drive arrangement 63 operates based on this control command, and drive the cylinder cam rotation, and then make steering wheel subassembly 1 move towards the direction that increases the area of contact between steering spindle 12 and the moment of torsion input shaft 31, it is terminal to move the flexible adjustment tank 65 of cylinder cam to reach flexible adjusting block 64 on steering spindle protection tube 61, realize the complete shrink of steering wheel subassembly 1, and then provide more activity spaces for the driver. After that, the vehicle steering control system is in a silent standby state. The silent standby state refers to that the vehicle steering control system does not do any operation under the condition of no operation instruction of the driver.

When the drive-by-wire mode of the vehicle is selected, the driver can control the telescopic state of the steering wheel assembly 1 through the adjusting buttons on the vehicle until the steering wheel assembly 1 is telescopic to the position which accords with the habit of the driver, and then the driving comfort of the driver can be improved. Specifically, the controller calculates and generates an adjusting instruction for controlling the telescopic adjusting driving device 63 based on an adjusting control instruction of a driver, the adjusting instruction is transmitted to the telescopic adjusting driving device 63 through the signal integrator 9, the telescopic adjusting driving device 63 rotates and drives the cylindrical cam to rotate based on the adjusting instruction, so that the steering wheel assembly 1 slides relative to the vehicle body fixing member 2, when the driver stops the adjusting button, the controller sends an adjusting stop instruction, the adjusting stop instruction is transmitted to the telescopic adjusting driving device 63 through the signal integrator 9, so as to control the telescopic adjusting driving device 63 to stop running, and further stop the relative movement of the steering wheel assembly 1 relative to the vehicle body fixing member 2.

When the vehicle is in a drive-by-wire mode and the vehicle is in a steering process, a driver can feel road feel simulation torque simulated by a vehicle steering control system through the rotating disc 11, and then the driving hand feel of the vehicle is improved. Specifically, the driver turns the steering wheel 11 to generate a steering torque, which is transmitted to the steering shaft 12 and the torque transmitting mechanism 3 by way of mechanical transmission; the torque transmission torsion bar 33 is slightly elastically deformed based on the rotational torque transmitted by the torque input shaft 31, and rotates the torque output shaft 32. Based on the elastic deformation of the torque transmission torsion bar 33, the transmission torques of the torque input shaft 31 and the torque output shaft 32 are different, so that the rotation angles of the torque input shaft 31 and the torque output shaft 32 are different, and the controller calculates and generates a driving control instruction based on the generated difference; specifically, the second signal acquisition mechanism 42 acquires the relative rotation angle between the first signal acquisition mechanism 41 and the second signal acquisition mechanism 42, and calculates to obtain rotation information; the second signal acquisition mechanism 42 transmits the obtained rotation information to the controller; the rotation information includes a first torque of the torque input shaft 31, a second torque of the torque output shaft 32, and a relative rotation angle of the torque input shaft 31 and the torque output shaft 32.

After the controller receives the rotation information sent by the rotation information acquisition device 4, the controller controls the steering of the vehicle based on the acquired rotation information and the current vehicle state, and meanwhile, a corresponding driving control instruction is calculated and generated based on the rotation information and the current road surface information, wherein the current vehicle state and the current road surface information are values detected by other sensors on the automobile and transmitted to the controller. The current vehicle state includes, but is not limited to, the current vehicle speed and the current vehicle tire state, and the current road surface information includes, but is not limited to, the current road surface friction. The controller calculates and outputs drive control carrying drive operation parameters, the drive control instruction is transmitted to the road feel simulation driving device 5 through the signal integrator 9, the road feel simulation driving device 5 operates based on the drive operation parameters in the drive control instruction after receiving the drive control instruction sent by the controller, and drives the torque output shaft 32 to rotate, and the rotation direction of the torque output shaft 32 is opposite to the rotation torque direction of the steering wheel assembly 1.

Therefore, the road feel simulation torque generated by the rotation of the torque output shaft 32 is in the opposite direction to the steering torque generated by the rotation of the steering wheel assembly 1. The road feel simulation torque is transmitted to the torque input shaft 31 via a torque transmission torsion bar 33 provided in the torque output shaft 32, and is further transmitted to the steering shaft 12 and the steering wheel 11 in this order. And then the driver can feel the simulated road resistance through the road feel simulation torque on the steering wheel 11, so that the use hand feel of the driver is improved.

After the vehicle is turned, the controller calculates a return control instruction again based on the rotation information, the return control instruction is transmitted to the road feel simulation driving device 5 through the signal integrator 9, and the road feel simulation driving device 5 operates based on the return control instruction, so that the steering wheel 11 can be automatically returned.

According to the vehicle steering system, the torque transmission mechanism, the rotation information acquisition device and the road feel simulation driving device are arranged, so that the controller and the vehicle steering system can realize a road feel simulation function, and the road driving resistance in the vehicle steering process is simulated, so that the use hand feeling of a driver is improved; the telescopic adjusting assembly can adjust the position of the steering wheel assembly according to the requirements of a driver under the condition that the vehicle is in drive-by-wire, so that the driving comfort of the user is improved, and the steering wheel assembly can be contracted under the condition that the vehicle is in an automatic driving state through the telescopic adjusting assembly, so that more activity space is provided for the driver; and through the signal integrator, the electric interface of the vehicle steering system is collected to one position for concentrated signal exchange, so that messy wiring caused by connection of multiple positions is avoided, the structural layout inside the vehicle steering system is facilitated, exposed plug-in components are reduced, and the structure of the vehicle steering system is neat and simple.

The foregoing description has disclosed fully embodiments of the present application. It should be noted that those skilled in the art can make modifications to the embodiments of the present application without departing from the scope of the claims of the present application. Accordingly, the scope of the claims of the present application is not to be limited to the particular embodiments described above.

Claims

1. A vehicle steering system comprises a steering wheel component (1) and a vehicle body fixing component (2), wherein the vehicle body fixing component (2) is used for being fixedly connected with a vehicle body of a vehicle; it is characterized by also comprising: the device comprises a torque transmission mechanism (3), a rotation information acquisition device (4) and a road feel simulation driving device (5);

the rotation information acquisition device (4) is connected with the torque transmission mechanism (3), the road feel simulation driving device (5) is in driving connection with the torque transmission mechanism (3), and the rotation information acquisition device (4) and the road feel simulation driving device (5) are in communication connection with a controller respectively;

the torque transmission mechanism (3) is respectively connected with the vehicle body fixing piece (2) and the steering wheel component (1); the torque transmission mechanism (3) is arranged to rotate with the rotation of the steering wheel assembly (1) to generate rotation information;

the rotation information acquisition device (4) is arranged to detect the rotation information generated by the torque transmission mechanism (3) and send the rotation information to a controller, so that the controller generates a corresponding driving control instruction based on the rotation information and current road surface information and sends the driving control instruction to the road feel simulation driving device (5); the drive control instruction carries drive operation parameters;

the road feel simulation driving device (5) is set to respond to the driving control instruction, operate based on the driving operation parameters and drive the torque transmission mechanism (3) to rotate so as to output road feel simulation torque to the steering wheel component (1) through the torque transmission mechanism (3).

2. The vehicle steering system according to claim 1, further comprising a telescopic adjustment assembly (6), wherein the telescopic adjustment assembly (6) is respectively connected with the steering wheel assembly (1) and the vehicle body fixing member (2), and the telescopic adjustment assembly (6) is configured to drive the steering wheel assembly (1) to reciprocate relative to the vehicle body fixing member (2) along the axial direction of the steering wheel assembly (1).

3. The vehicle steering system according to claim 2, characterized in that the torque-transmitting mechanism (3) includes a torque input shaft (31), a torque output shaft (32), and a torque-transmitting torsion bar (33);

the torque input shaft (31) is in transmission connection with the steering wheel component (1) and is arranged to rotate along with the rotation of the steering wheel component (1); the torque transmission torsion bar (33) is in transmission connection with the torque input shaft (31) and the torque output shaft (32) respectively.

4. The vehicle steering system according to claim 3, wherein the turning information acquisition device (4) includes a first signal acquisition mechanism (41) and a second signal acquisition mechanism (42), the first signal acquisition mechanism (41) and the second signal acquisition mechanism (42) being coaxially disposed;

the first signal acquisition mechanism (41) is sleeved on the torque input shaft (31) and rotates synchronously with the torque input shaft (31);

the second signal acquisition mechanism (42) is sleeved on the torque output shaft (32) and rotates synchronously with the torque output shaft (32); the second signal acquisition mechanism (42) is configured to detect the rotation information generated by the torque transmission mechanism (3) and send the rotation information to the controller.

5. A vehicle steering system according to claim 4, wherein the steering wheel unit (1) comprises a steering wheel (11) and a steering shaft (12), the steering shaft (12) being in driving connection with the steering wheel (11) and the torque input shaft (31), respectively, the steering shaft being arranged to mechanically transmit torque generated by rotation of the steering wheel to the torque input shaft (31).

6. A vehicle steering system according to claim 5, characterized in that the telescopic adjusting assembly (6) further comprises a steering column (61) and a telescopic guiding structure (62), the steering column (61) is sleeved outside the steering shaft (12), and the steering column (61) is slidably connected with the vehicle body fixing member (2) and the telescopic guiding structure (62) respectively.

7. A vehicle steering system according to claim 6, wherein the telescopic adjustment assembly (6) further comprises a telescopic adjustment drive means (63), the telescopic adjustment drive means (63) being fixedly connected to the body mount (2), the telescopic adjustment drive means (63) being arranged to drive the telescopic guide structure (62) in rotation.

8. The vehicle steering system according to claim 6, wherein one of the steering column (61) and the vehicle body fixing member (2) is provided with a guide limiting block (7), and the other is provided with a guide limiting groove matched with the guide limiting block (7), and the guide limiting block (7) is slidably connected with the guide limiting groove.

9. The vehicle steering system according to claim 6, wherein one of the steering column (61) and the telescopic guide structure (62) is provided with a telescopic adjusting block (64), and the other is provided with a telescopic adjusting groove (65) matched with the telescopic adjusting block (64), and the telescopic adjusting block (64) is in sliding connection with the telescopic adjusting groove (65).

10. The vehicle steering system according to claim 7, further comprising a signal integrator (9), wherein the signal integrator (9) is in communication connection with the telescopic adjustment driving device (63), the rotational information collecting device (4), the road feel simulation driving device (5), and the controller, respectively.