CN203876812U - Baffle ring type steer-by-wire steering wheel device for vehicle - Google Patents

Abstract

The utility model discloses a baffle ring type steer-by-wire steering wheel device for a vehicle. The baffle ring type steer-by-wire steering wheel device aims to accurately detect the rotational angle of a steering wheel, provide an adjustable and comfortable road sense for a driver, change working modes on different working conditions and adjust the steering wheel to complete the number of turns of rotation in the whole steering process. A center shaft is mounted in a box body and a bearing block of a lower end cover through a bearing. A baffle ring is fixedly arranged on the center shaft. An angle spacing ring is mounted on the center shaft in a movable fit mode. A hollow input shaft of an angular displacement sensor is fixedly connected with the center shaft. A shell of the angular displacement sensor is fixedly arranged on the lower end cover of the box body. A chuck is fixedly arranged at the lower end of the center shaft. A motor is fixedly arranged on a motor bracket. The motor bracket is fixedly connected with the box body. A transmission lead screw is mounted on a support through a bearing. A transmission nut and the transmission lead screw are mounted in a transmission fit mode. The transmission lead screw is fixedly connected with an output shaft of the motor through a coupler. The baffle ring type steer-by-wire steering wheel device is suitable for being used as the steer-by-wire steering wheel of the vehicle.

Description

Ring-type vehicle steer-by-wire steering wheel device

technical field

The utility model relates to a vehicle steering device, in particular to a retaining ring type vehicle wire-controlled steering wheel device.

Background technique

The function of the steering system is to control the driving direction of the vehicle. The system should be able to keep the vehicle running in a straight line stably and flexibly change the driving direction according to the requirements. The basic requirements for the steering system are light and flexible operation, stable and reliable operation, and economical and durable use. The steering performance is an important factor to ensure the safe driving of the vehicle, reduce the labor intensity of the driver, and improve the work productivity. The steering system is a key assembly that determines vehicle safety and operating efficiency.

The vehicle steer-by-wire steering wheel device with the patent application number 201310025567.X can change the working mode under different working conditions, adjust the number of turns of the steering wheel to complete the full steering in the corresponding mode, and can accurately detect the rotation angle of the steering wheel. Provide adjustable and suitable road feeling for the driver. In the steer-by-wire steering wheel device of the vehicle, when the steering wheel rotates, the two-way hydraulic pump will be driven to rotate. The hydraulic oil output by the two-way hydraulic pump enters the proportional throttle valve, and the hydraulic oil from the proportional throttle valve enters the inlet of the two-way hydraulic pump. The oil port and the proportional throttle valve open different throttle areas according to the road surface information instructions transmitted by the micro-control unit, so that a corresponding pressure difference is generated between the oil inlet and the oil outlet of the two-way hydraulic pump, and the resulting pressure difference The force will act on the steering wheel to generate a corresponding damping force, which can provide the driver with corresponding road feeling feedback. The pressure difference sensor continuously detects the pressure difference between the two-way hydraulic pump and the proportional throttle valve inlet and outlet and outputs The electric signal is used to control and adjust the throttle area of the proportional throttle valve, so as to achieve a suitable road feeling state. This vehicle steer-by-wire steering wheel device uses a proportional throttle valve and a two-way hydraulic pump to provide the driver with a suitable sense of the road. The weight of the device is increased, and the pipeline structure is complex and bulky, which increases the difficulty of installation, causes a substantial increase in manufacturing cost, and wastes materials.

Therefore, it is very necessary to design a new type of vehicle steering-by-wire steering wheel device, which is conducive to promoting the development, development and application of the steering-by-wire system.

Contents of the invention

The retaining ring type vehicle steering wheel steering wheel device provided by the utility model can overcome the deficiencies in the prior art, simplify the structure of the mechanical device, reduce the difficulty and cost of installation, and can accurately detect the rotation angle of the steering wheel at the same time, and can provide the driver with Adjustable, suitable road feel, and can change the working mode under different working conditions, adjust the number of turns of the steering wheel to complete the full steering.

In order to solve the above-mentioned technical problems, the utility model adopts the following technical solutions: the steering wheel device consists of a central shaft, a box body, a retaining ring, an angle limit ring, a lower end cover, an angular displacement sensor, a motor, a motor bracket, a shaft coupling, a bracket , drive nut, drive screw, proximity switch, chuck upper cover, chuck base, chuck, electromagnetic coil and electromagnetic coil support; the upper end of the central shaft is installed in the bearing seat on the box through a bearing, and the The lower side of the central shaft is installed in the bearing seat on the lower end cover through bearings. The left side of the retaining ring is provided with a radial boss, and the left lower surface of the retaining ring is provided with an axial fan-shaped boss. The central angle of the fan-shaped boss is α degree, the retaining ring is fixedly installed on the central shaft, and the upper and lower surfaces of the angle limiting ring are respectively provided with a fan-shaped boss at an angle of α, and the fan-shaped boss is located on the same side of the angle limiting ring. Symmetrical, there are N number of angle limiting rings, and the angle limiting rings are installed on the central shaft with a moving fit. The lower surface of that one is installed in sliding fit with the upper surface of the lower end cover, the upper surface of the uppermost one of the angle limiting rings is installed in sliding fit with the lower surface of the retaining ring, and the upper surface on the left side of the lower end cover is provided with a α-degree fan-shaped boss, the lower end cover is fixedly connected with the lower part of the box body, the axial fan-shaped boss on the left lower surface of the stop ring and the fan-shaped boss on the angle limit ring and the fan-shaped fan-shaped boss on the left upper surface of the lower end cover The radial dimensions of the bosses correspond to each other. When the stop ring rotates to the corresponding position, the angle limiting ring can be driven by the fan-shaped boss to rotate. The fan-shaped boss of the angle limiting ring contacts the fan-shaped boss on the lower end cover. Restricted behind the boss, the central shaft cannot continue to rotate forward. The housing of the angular displacement sensor is fixedly installed on the lower surface of the lower end cover, and the input hollow shaft of the angular displacement sensor is fixedly connected with the central shaft. The motor is fixedly installed on the motor bracket, the motor bracket is fixedly connected with the box body, the transmission screw is installed on the bracket through the bearing, the transmission nut is installed in cooperation with the transmission screw, and the left side of the transmission nut is set There is a stopper, the left surface of the transmission nut is installed in sliding fit with the outer surface of the right side plate of the box body, the right surface of the transmission nut is installed in sliding fit with the inner surface of the right side plate of the bracket, and the drive nut is installed in a sliding fit The stopper of the drive nut is installed in a sliding fit with the long groove on the right side of the box body. When the drive nut is at the upper limit position, the upper stopper of the drive nut can contact the radial boss on the left side of the stop ring to limit its continuous forward rotation. , the bracket is fixedly connected with the box body, the transmission lead screw is fixedly connected with the output shaft of the motor through a coupling, the proximity switch is divided into an upper limit switch and a lower limit switch, and the upper limit switch and the lower limit switch On the bracket fixedly installed, the chuck is fixedly installed on the lower end of the central shaft, the upper cover of the chuck and the chuck base are fixedly installed on the chuck, and the electromagnetic coil is divided into a front electromagnetic coil and a rear electromagnetic coil. The electromagnetic coil bracket is divided into a front electromagnetic coil bracket and a rear electromagnetic coil bracket, the front electromagnetic coil is fixedly installed on the front electromagnetic coil bracket, and the rear electromagnetic coil is fixedly installed on the rear electromagnetic coil bracket. On the magnetic coil support, the front and rear electromagnetic coil supports are fixedly connected with the box body.

The box body is fixedly connected by an upper end cover and four side walls. The central angle of the fan-shaped boss on the retaining ring can be 30 degrees, and the central angle of the fan-shaped boss on the angle limit ring is also 30 degrees. The angle limit There are 5 bit rings in total. The central angle of the fan-shaped boss on the retaining ring can be other angles, and the central angle of the fan-shaped boss on the angle limiting ring also changes accordingly, and the number of the angle limiting rings can also change. The angular displacement sensor is a hollow shaft angular encoder. The output shaft of the motor is installed on the same axis as the transmission shaft. The upper limit switch and the lower limit switch are fixedly installed on the rear side of the bracket, wherein the installation height of the upper limit switch is consistent with the height when the drive nut is at the upper limit position, and the installation height of the lower limit switch is the same as the height when the drive nut is at the lower limit position unanimous. The chuck can be a rubber and plastic part.

The beneficial effect of adopting the utility model is that it can accurately detect the rotation angle of the steering wheel, can provide the driver with an adjustable and suitable road feeling, and can change the working mode and adjust the steering wheel to complete the full steering rotation under different working conditions. The number of laps has a very good promotion and application value.

Description of drawings

Fig. 1 is the front view of the retaining ring type vehicle steering-by-wire steering wheel device described in the utility model;

Fig. 2 is a left view of the retaining ring type vehicle steering wheel steering device of the utility model.

In the figure: central axis 1 box body 2 retaining ring 3 angle limit ring 4 lower end cover 5 angular displacement sensor 6 motor 7 motor bracket 8 coupling 9 bracket 10 drive nut 11 drive screw 12 proximity switch 13 upper cover of chuck 14 Chuck base 15 Chuck 16 Electromagnetic coil 17 Electromagnetic coil bracket 18

Detailed ways

The utility model is described in further detail below in conjunction with accompanying drawing and specific embodiment.

In Fig. 1 and Fig. 2, the stop ring type vehicle steering wheel steering device is mainly composed of a central shaft 1, a box body 2, a stop ring 3, an angle limit ring 4, a lower end cover 5, an angular displacement sensor 6, a motor 7, and a motor Support 8, shaft coupling 9, support 10, drive nut 11, drive screw 12, proximity switch 13, chuck upper cover 14, chuck base 15, chuck 16, electromagnetic coil 17 and electromagnetic coil support 18 are formed; The upper end of the central shaft 1 is installed in the bearing seat on the box body 2 through a bearing, the lower side of the central shaft 1 is installed in the bearing seat on the lower end cover 5 through a bearing, and the left side of the retaining ring 3 is provided with a radial protrusion platform, the lower left surface of the stop ring 3 is provided with an axial fan-shaped boss, the central angle of the fan-shaped boss is α degree, the stop ring 3 is fixed and installed on the central shaft 1 through a key, and the angle limit ring 4 The upper and lower surfaces of the upper and lower surfaces are respectively provided with a fan-shaped boss with an α angle, and the fan-shaped boss is located on the same side of the angle limiting ring 4 and is symmetrical up and down. There are N number of the angle limiting rings 4, and the angle limiting ring 4 The moving fit is installed on the central shaft 1, and the angle limiting rings 4 are installed by sliding fit with each other, and the lower surface of the lowermost one of the angle limiting rings 4 is installed in a sliding fit with the upper surface of the lower end cover 5 , the upper surface of the uppermost one of the angle limiting rings 4 is slidably fitted with the lower surface of the stop ring 3, and the upper surface of the left side of the lower end cover 5 is provided with a fan-shaped boss of α degree, and the lower end cover 5 and the lower part of the box body 2 are fixedly connected by screws, the diameter of the axial fan-shaped boss on the left lower surface of the stop ring 3 and the fan-shaped boss on the angle limit ring 4 and the fan-shaped boss on the left upper surface of the lower end cover 5 The dimensions correspond to each other. When the stop ring 3 rotates to the corresponding position, the angle limiting ring 4 can be driven to rotate through the fan-shaped boss, and the fan-shaped boss of the angle limiting ring 4 contacts the fan-shaped Restricted behind the boss, the central shaft 1 cannot continue to rotate forward. The housing of the angular displacement sensor 6 is fixed on the lower surface of the lower end cover 5 by screws, and the input hollow shaft of the angular displacement sensor 6 is connected to the The central shaft 1 is fixedly connected, the motor 7 is fixedly mounted on the motor bracket 8 through screws, the motor bracket 8 is fixedly connected with the box body 2 through screws, and the transmission screw 12 is mounted on the bracket 10 through a bearing. The transmission nut 11 and the transmission screw rod 12 are installed in transmission and cooperation. The left side of the transmission nut 11 is provided with a stopper. The right side of the nut 11 is installed in a sliding fit with the inner side of the right side plate of the bracket 10, the upper block of the transmission nut 11 is installed in a sliding fit with the long groove on the right side of the box body 2, and the transmission nut 11 is located at the upper limit position , the upper block of the transmission nut 11 can contact with the radial boss on the left side of the stop ring 3 to limit its continuous forward rotation, the bracket 10 is fixedly connected with the box body 2, and the transmission screw 12 is connected through the shaft coupling The device 9 is fixedly connected with the output shaft of the motor 7, the proximity switch 13 is divided into an upper limit switch and a lower limit switch, and the upper limit switch and the lower limit switch are fixedly installed on the bracket 10, and the chuck 16 passes It is fixedly installed on the lower end of the central shaft 1 through nuts and gaskets, the chuck upper cover 14 and the chuck base 15 are fixed on the chuck 16 by screws, and the electromagnetic coil 17 is divided into a front electromagnetic coil and a rear electromagnetic coil , the electromagnetic coil support 18 is divided into a front electromagnetic coil support and a rear electromagnetic coil support, the front electromagnetic coil is fixedly installed on the front electromagnetic coil support, the rear electromagnetic coil is fixedly installed on the rear electromagnetic coil support, and the front electromagnetic coil , The rear electromagnetic coil bracket is fixedly connected with the box body 2 by screws.

The box body 2 is formed by welding the upper end cover and four side walls, the central angle of the fan-shaped boss on the retaining ring 3 can be 30 degrees, and the central angle of the fan-shaped boss on the angle limit ring 4 is also 30 degrees , there are 5 angle limit rings 4 in total. The central angle of the fan-shaped boss on the stop ring 3 can be other angles, and the central angle of the fan-shaped boss on the angle limiting ring 4 also changes accordingly, and the number of the angle limiting ring 4 can also change. The angular displacement sensor 6 is a hollow shaft angular encoder. The output shaft of the motor 7 is installed on the same axis as the transmission shaft 12 . The upper limit switch and the lower limit switch are fixedly installed on the rear side of the bracket 10, wherein the installation height of the upper limit switch is consistent with the height when the drive nut 11 is at the upper limit position, and the installation height of the lower limit switch is the same as that of the drive nut 11 at the lower limit position. same height. The chuck 16 is a rubber and plastic part.

The steering wheel is connected with the central shaft 1 through a coupling, and the rotation of the steering wheel will drive the central shaft 1 and the retaining ring 3 fixed on the central shaft 1, the input hollow shaft of the angular displacement sensor 6 and the chuck 16 to rotate. The angular displacement sensor 6 is used to detect the angle that the steering wheel turns, and feeds back to the controller. The chuck 16 is used to realize the road sense feedback. The controller controls the current passing through the electromagnetic coil 17 to generate different electromagnetic attraction forces. The electromagnetic attraction force acts on the chuck base 15 and the chuck upper cover 14 on the edge of the chuck 16, thereby generating resistance to rotation. torque to achieve road feel feedback.

When the vehicle is about to enter the low-speed operation mode, the command of the controller causes the motor 7 to rotate forward, and the drive screw 12 is driven to rotate through the coupling 9, thereby controlling the drive nut 11 to move to the uppermost position. At this time, the upper limit switch detects signal, the motor 7 stops rotating, and the controller can automatically record the state at this time. When the operator rotates the steering wheel to the left or right for half a circle, the angular displacement sensor 6 feeds back the rotation angle information in real time, and the controller drives the steering mechanism to realize the vehicle turning to the left or to the right. When the steering wheel rotates half a circle to the left or right, the boss on the left side of the stop ring 3 will be stuck on the stopper of the drive nut 11, and the steering wheel can no longer continue to rotate at this time, and the controller drives the steering mechanism at this time Full steering of the vehicle to the left or right is realized. When the vehicle is about to enter the high-speed driving mode, the command of the controller causes the motor 7 to rotate in the opposite direction, and the drive screw 12 is driven to rotate through the coupling 9, thereby controlling the drive nut 11 to move to the lowest position. At this time, the lower limit switch detects When the signal is received, the motor 7 stops rotating, and the controller can automatically record the state at this time. When the operator rotates the steering wheel two and a half times to the left or right, the angular displacement sensor 6 feeds back the rotation angle information in real time, and the controller drives the steering mechanism to realize the steering of the vehicle to the left or right. At the same time, the stop ring 3 will drive the angle limiting ring 4 to rotate one by one from top to bottom. When the steering wheel rotates to the left or right for two and a half times, the fan-shaped boss of the lowermost angle limit ring 4 will be stuck on the fan-shaped boss on the lower end cover 5, and the steering wheel can no longer continue to rotate at this time. At this time, the controller drives the steering mechanism to realize the full steering of the vehicle to the left or to the right.

Claims (7)

1. A retaining ring type vehicle steering wheel steering wheel device, characterized in that: mainly by the central shaft (1), casing (2), retaining ring (3), angle limit ring (4), lower end cover (5 ), angular displacement sensor (6), motor (7), motor bracket (8), coupling (9), bracket (10), drive nut (11), drive screw (12), proximity switch (13) , a chuck upper cover (14), a chuck base (15), a chuck (16), an electromagnetic coil (17) and an electromagnetic coil support (18); the upper end of the central shaft (1) is mounted on the box through a bearing In the bearing seat on (2), the lower side of the central shaft (1) is installed in the bearing seat on the lower end cover (5) through bearings, and the left side of the retaining ring (3) is provided with a radial boss, so The lower left surface of the retaining ring (3) is provided with an axial fan-shaped boss, the central angle of the fan-shaped boss is α degrees, the retaining ring (3) is fixedly installed on the central shaft (1), and the angle limiting ring The upper and lower surfaces of (4) are respectively provided with a fan-shaped boss with an α angle, and the fan-shaped boss is located on the same side of the angle limiting ring (4) and is symmetrical up and down. There are N total of the angle limiting rings (4), The angle limiting rings (4) are mounted on the central shaft (1) in a moving fit, and the angle limiting rings (4) are installed with a sliding fit with each other, and the lowermost part of the angle limiting rings (4) The lower surface of that one is installed in sliding fit with the upper surface of the lower end cover (5), and the upper surface of the uppermost one of the angle limiting rings (4) is installed in sliding fit with the lower surface of the retaining ring (3). The upper surface on the left side of the lower end cover (5) is provided with a fan-shaped boss at an angle of α, the lower end cover (5) is fixedly connected with the lower part of the box body (2), and the axial fan-shaped boss on the left lower surface of the retaining ring (3) The radial dimensions of the boss and the fan-shaped boss on the angle limiting ring (4) and the fan-shaped boss on the left upper surface of the lower end cover (5) correspond to each other, and the stop ring (3) is rotated to the corresponding position During this time, the angle limiting ring (4) can be driven by the fan-shaped boss to rotate, and the fan-shaped boss of the angle-limiting ring (4) is restricted after touching the fan-shaped boss on the lower end cover (5), and the central axis ( 1) it cannot continue to rotate forward, the housing of the angular displacement sensor (6) is fixedly installed on the lower surface of the lower end cover (5), and the input hollow shaft of the angular displacement sensor (6) is connected to the central shaft (1) Fixedly connected, the motor (7) is fixedly installed on the motor bracket (8), the motor bracket (8) is fixedly connected with the box body (2), and the transmission screw (12) is installed on the bracket (10) through a bearing ), the drive nut (11) and the drive screw rod (12) are installed in transmission, the left side of the drive nut (11) is provided with a stopper, and the left side of the drive nut (11) is in contact with the box body ( 2) The outer side of the right side plate is slidably fitted and installed, the right side of the drive nut (11) is slidably fitted with the inner side of the right side plate of the bracket (10), and the upper block of the drive nut (11) is fitted with the The long groove on the right side of the box body (2) is installed in sliding fit. When the transmission nut (11) is at the upper limit position, the upper stop of the transmission nut (11) The block can contact with the radial boss on the left side of the stop ring (3) to limit its continuous forward rotation, the bracket (10) is fixedly connected with the box body (2), and the transmission screw (12) passes through the coupling ( 9) fixedly connected with the output shaft of the motor (7), the proximity switch (13) is divided into an upper limit switch and a lower limit switch, the upper limit switch and the lower limit switch are fixedly installed on the bracket (10), the The chuck (16) is fixedly mounted on the lower end of the central shaft (1), the chuck upper cover (14) and the chuck base (15) are fixedly mounted on the chuck (16), and the electromagnetic coil (17) is divided into It is a front electromagnetic coil and a rear electromagnetic coil, and the electromagnetic coil support (18) is divided into a front electromagnetic coil support and a rear electromagnetic coil support. The rear electromagnetic coil is fixedly installed on the rear electromagnetic coil support, and the front and rear electromagnetic coil supports are fixedly connected with the box body (2). the 2. The retaining ring type vehicle steering wheel device according to claim 1, characterized in that: the box body (2) is composed of an upper end cover and four side walls fixedly connected. the 3. According to the said retaining ring type vehicle steering wheel steering wheel device according to claim 1, it is characterized in that: the central angle of the fan-shaped boss on the retaining ring (3) can be 30 degrees, and the angle limit ring (4) The central angle of the fan-shaped boss is also 30 degrees, and there are 5 angle limit rings (4); the central angle of the fan-shaped boss on the stop ring (3) can be other angles, and the fan-shaped boss on the angle limit ring (4) The central angle also changes accordingly, and the number of angle limiting rings (4) can also change. the 4. The retaining ring type steering wheel device for vehicles with steer-by-wire according to claim 1, characterized in that: the angular displacement sensor (6) is a hollow shaft angular encoder. the 5. The retaining ring type vehicle steering wheel steering device according to claim 1, characterized in that: the output shaft of the motor (7) and the transmission shaft (12) are installed on the same axis. the 6. According to claim 1, said retaining ring type vehicle steering wheel steering device, characterized in that: said upper limit switch and lower limit switch are fixedly installed on the rear side of the bracket (10), wherein the installation height of the upper limit switch is the same as that of the transmission The nut (11) has the same height when it is located at the upper limit position, and the installation height of the lower limit switch is consistent with the height when the drive nut (11) is located at the lower limit position. the 7. The retaining ring type vehicle steering wheel steering device according to claim 1, characterized in that: the chuck (16) is a rubber and plastic part. the