CN114802429A - Vehicle steering system and new energy automobile - Google Patents

Abstract

The invention discloses a vehicle steering system and a new energy automobile, wherein the vehicle steering system comprises two parts, namely a direction control end and a steering structure end, the steering structure end comprises two driving front wheels which are symmetrically distributed, and a front driving cross rod is arranged at the middle position of the two driving front wheels, one side of the front driving cross rod is provided with an assembly hydraulic cylinder, the two assembly hydraulic cylinders are symmetrically distributed and fixed on an automobile chassis along the central plane of the two driving front wheels in a mirror image manner, the output ends of the two assembly hydraulic cylinders are fixedly provided with assembly transverse pull rods, the tail ends of the two assembly transverse pull rods are hinged with the two driving front wheels, the direction control end comprises a direction transmission rod and a torque sensor, and the direction transmission rod is fixedly connected with an output shaft on the torque sensor. In the using process, the invention reduces the influence of mechanical abrasion on steering and can regularly correct the steering system.

Description

A vehicle steering system and a new energy vehicle

technical field

The invention relates to the technical field of new energy vehicles, in particular to a vehicle steering system and a new energy vehicle.

Background technique

A series of devices used to change or maintain the driving or reverse direction of a car is called a steering system. The function of the steering system is to control the driving direction of the car according to the driver's wishes. The steering system of the car is very important to the driving safety of the car, so the parts of the car steering system are called security parts. Car steering system and braking system are two systems that must be paid attention to in car safety.

In new energy vehicles or fuel vehicles, the power source of the vehicle steering system is mainly determined by manpower. It consists of three major parts: the direction operating mechanism (steering wheel), the steering gear, and the steering transmission system, supplemented by electric or hydraulic assistance. , During the steering process, the rotational force of the steering wheel is converted into a lateral linear movement.

Whether in the process of electric power assist or hydraulic power assist, during the operation of the internal transmission gears, there is mechanical wear between the transmission gears, and between the universal joint between the steering column and the transmission shaft and the steering gear. There is mechanical wear, and the slight deviation of the lateral tie rod in the steering system during the displacement process will lead to a large error in the driving direction of the car. Therefore, in order to solve such problems, we propose a vehicle steering system and a new energy source. car.

SUMMARY OF THE INVENTION

The purpose of the present invention is to propose a vehicle steering system and a new energy vehicle in order to solve the shortcomings existing in the prior art.

In order to achieve the above object, the present invention adopts the following technical solutions:

A vehicle steering system, the vehicle steering system includes two parts: a direction control end and a steering structure end, the steering structure end includes two symmetrically distributed driving front wheels to be arranged in the middle of the two driving front wheels In some front drive crossbars, an assembly hydraulic cylinder is arranged on one side of the front drive crossbar, and two of the assembly hydraulic cylinders are distributed and fixed on the vehicle chassis in a mirror-symmetrical distribution along the center plane of the two driving front wheels, and An assembly transverse pull rod is fixedly installed on the output end positions of the two assembly hydraulic cylinders, and the ends of the two assembly transverse pull rods are hinged with the two driving front wheels;

The direction control end is composed of a direction transmission rod and a torque sensor, the direction transmission rod is fixedly connected with the output shaft on the torque sensor, and there is no mechanical mechanism between the two major parts of the direction control end and the steering structure end. Structural connection.

Through the above settings, the overall steering system consists of two parts: the direction control end and the steering structure end, and there is no mechanical connection between the direction control end and the steering structure end, and the driver can make a small force act on the torque sensor. There is no need for mechanical wear caused by many components such as movable rods and universal joints during the movement process;

In addition, during the steering process of the car, it is composed of two symmetrically arranged assembly hydraulic cylinders, which abandons the current driving method of motor-driven gears, thereby reducing the impact of mechanical wear on the overall device.

It is further arranged that a driving gear plate is fixedly installed on the end position of the directional transmission rod, a stepper motor is arranged at one side of the torque sensor, and a co-action gear plate is fixedly installed on the output shaft of the stepper motor, The cooperating gear plate is meshed with the driving gear plate.

Through the above settings, during the driving process, the driver rotates the direction transmission lever, and the torque sensor senses the angle of the driver's rotation during the steering process, and converts it into an electrical signal and sends it to the user terminal;

In the process of turning off the car, by starting the stepper motor, the cooperating gear plate is driven to rotate at a uniform speed, then under the action of the engagement between the driving gear plate and the cooperating gear plate, the stepper motor drives the direction transmission rod to carry out a certain direction and A certain angle of rotation, thereby driving the steering wheel back to positive.

It is further arranged that a displacement sensor is fixedly installed on the upper end positions of the two assembly hydraulic cylinders, a displacement transmission rod is fixedly installed on the output shaft of the displacement sensor, and a positioning connecting rod is arranged at the end position of the displacement transmission rod, The two positioning connecting rods are mounted on the transverse tie rod of the assembly.

Through the above settings, during the start-up process of the two assembly hydraulic cylinders, the two lateral tie rods move the silicone in a linear direction, and the displacement transmission rod is installed on the assembly lateral tie rod through the positioning connecting rod, and is sensed in real time by the displacement sensor. The displacement formation and displacement direction of the transverse tie rod of the assembly.

It is further arranged that a dust cover is arranged on the transverse pull rod of the assembly, one end of the dust cover is installed on the hydraulic cylinder of the assembly, and the other end of the dust cover is installed on the transverse pull rod of the assembly.

Through the above settings, the hydraulic cylinder of the assembly may be affected by external dust during operation, so a dust cover is added to prevent the impact of dust on the hydraulic cylinder of the assembly.

It is further arranged that a mounting plate is fixedly installed on the end position of each of the displacement transmission rods, the lower end of the mounting plate is provided with a buffer force relief plate, and the middle position of the buffer force relief plate and the lower surface of the installation plate are rotationally connected. .

Through the above settings, during the high-speed driving of the car, the whole car will be bumped to varying degrees. During the bumping process, the ups and downs of the positioning connecting rod will affect the normal use process of the displacement transmission rod. The connection method between them buffers the impact force generated in the process of bumping in the way of ups and downs left and right.

It is further arranged that first buffer springs are fixedly installed on both ends of the upper surface of the buffer force relief plate, and the upper ends of the two first buffer springs are installed on the lower surface positions of the installation plate.

Through the above arrangement, during the up and down movement of the buffer relief plate, the first buffer spring at the corresponding position can offset and absorb the impact force during the reciprocating movement.

It is further arranged that a ball sleeve is fixedly installed at the center of the lower surface of the buffer force relief plate, a rolling ball is welded at the upper end of the positioning connecting rod, and the rolling ball and the ball sleeve are slidably connected.

Through the above arrangement, the lower part of the buffer force relief plate and the positioning connecting rod are connected by the ball sleeve and the rolling ball, which can satisfy the multi-angle buffer force.

It is further arranged that a support plate is fixedly installed on the upper ends of the two assembly hydraulic cylinders, an assembly sliding rod is fixedly installed between the upper ends of the two support plates, and an assembly is slidably installed on the assembly sliding rod. A sliding block, a connecting curved rod is fixedly installed between the sliding block of the assembly and the mounting plate.

Through the above settings, because the two assembly transverse tie rods move in the same direction during the steering process of the front drive wheel, the assembly sliding block only moves in one direction when the car is rotating in one direction, and moves in two directions. The connecting crank rod connects the sliding block and the mounting plate, and integrates the two displacement transmission rods into a relatively complete structure.

It is further arranged that a second buffer spring is provided on the circumferential outer wall of the assembly sliding rod at both ends of the assembly sliding block;

The cross-sections of the two connecting curved rods are in the shape of an upward arch.

Through the above settings, during the movement of the assembly sliding block, the second buffer spring at one of the directional positions is used to offset the impact force generated by the assembly sliding block during the rapid rotation process, which plays a protective role between the support plates;

In addition, the shapes of the two connecting curved rods are limited, so that the connecting curved rods present an upward curved arch shape, so that the connecting curved rods can bear more impact force.

The new energy vehicle includes the vehicle steering system described in claims 1-9.

A vehicle steering system and a new energy vehicle proposed by the present invention have the beneficial effects that: during the use of this solution, the overall steering system is composed of two parts: a direction control end and a steering structure end, and the space between the direction control end and the steering structure end is Without any mechanical structure connection, the driver can make a small force act on the torque sensor, without the mechanical wear caused by the movement of the movable rod, universal joint and many other components during the movement;

In addition, during the steering process of the car, it is composed of two symmetrically arranged assembly hydraulic cylinders, which abandons the current driving method of motor-driven gears, thereby reducing the impact of mechanical wear on the overall device.

Description of drawings

1 is a schematic structural diagram of a vehicle steering system and a new energy vehicle proposed by the present invention;

2 is a schematic structural diagram of a vehicle steering system and a direction control end component of a new energy vehicle proposed by the present invention;

3 is a schematic structural diagram of a vehicle steering system and a steering structural end component of a new energy vehicle proposed by the present invention;

4 is a schematic structural diagram of a vehicle steering system and an assembly hydraulic cylinder component of a new energy vehicle proposed by the present invention;

FIG. 5 is a schematic structural diagram of the driving mode in the hydraulic cylinder component in FIG. 4 of a vehicle steering system and a new energy vehicle proposed by the present invention;

6 is a schematic structural diagram of a vehicle steering system and a mounting plate component of a new energy vehicle proposed by the present invention.

In the figure: 1. Drive front wheel; 2. Front drive cross bar; 3. Assembly transverse pull rod; 4. Direction transmission rod; 5. Torque sensor; 6. Assembly hydraulic cylinder; 7. Dust cover; 8. Co-acting gear plate; 9. Stepping motor; 10. Drive gear plate; 11. Support plate; 12. Mounting plate; 13. Connecting curved rod; 14. Assembly sliding block; 15. First buffer spring; 16. Buffer Unloading plate; 17. Positioning connecting rod; 18. Displacement transmission rod; 19. Second buffer spring; 20. Rolling ball; 21. Displacement sensor; 22. Assembly sliding rod; 23. Ball sleeve.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments.

In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inside", " The orientation or positional relationship indicated by "outside" is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, so as to The specific orientation configuration and operation are therefore not to be construed as limitations of the present invention.

1-6, a vehicle steering system, the vehicle steering system includes two parts: a direction control end and a steering structure end, the steering structure end includes two symmetrically distributed driving front wheels 1 to A front drive cross bar 2 is arranged in the middle of the front drive wheel 1 , and an assembly hydraulic cylinder 6 is arranged on one side of the front drive cross bar 2 . The center plane is mirror-symmetrically distributed and fixed on the chassis of the vehicle, and the output end positions of the two assembly hydraulic cylinders 6 are fixedly installed with assembly transverse tie rods 3. The ends of the two assembly transverse tie rods 3 are connected to the two drive The front wheels 1 are hinged;

The direction control end is composed of a direction transmission rod 4 and a torque sensor 5. The direction transmission rod 4 is fixedly connected with the output shaft on the torque sensor 5. The direction control end and the steering structure end are two parts. There is no mechanical connection between them.

A driving gear plate 10 is fixedly installed on the end position of the direction transmission rod 4 , a stepper motor 9 is arranged on one side of the torque sensor 5 , and a cooperating gear plate is fixedly installed on the output shaft of the stepper motor 9 8. The cooperating gear plate 8 meshes with the driving gear plate 10.

A displacement sensor 21 is fixedly installed on the upper end positions of the two assembly hydraulic cylinders 6 , a displacement transmission rod 18 is fixedly installed on the output shaft of the displacement sensor 21 , and a positioning connecting rod is arranged at the end position of the displacement transmission rod 18 17. The two positioning connecting rods 17 are installed on the assembly transverse pull rod 3, and the assembly transverse pull rod 3 is provided with a dust cover 7, and one end of the dust cover 7 is installed on the assembly hydraulic cylinder 6, And the other end of the dust cover 7 is installed on the transverse pull rod 3 of the assembly, a mounting plate 12 is fixedly installed on the end position of each of the displacement transmission rods 18, and the lower end of the mounting plate 12 is provided with a buffer force relief plate 16, There is a rotational connection between the middle position of the buffer force relief plate 16 and the lower surface of the mounting plate 12 , and a first buffer spring 15 is fixedly installed at both ends of the upper surface of the buffer force relief plate 16 . The upper end of the spring 15 is installed on the lower surface of the mounting plate 12 , a ball sleeve 23 is fixedly installed at the center of the lower surface of the buffer force relief plate 16 , and a rolling ball 20 is welded to the upper end of the positioning connecting rod 17 . 20 and the ball sleeve 23 are slidably connected, the upper ends of the two assembly hydraulic cylinders 6 are fixedly installed with support plates 11, and the assembly sliding rods 22 are fixedly installed between the upper ends of the two support plates 11. An assembly sliding block 14 is slidably installed on the assembly sliding rod 22 , a connecting curved rod 13 is fixedly installed between the assembly sliding block 14 and the mounting plate 12 , and the assembly sliding rod 22 is located at the two sides of the assembly sliding block 14 . A second buffer spring 19 is arranged on the circumferential outer wall of the end position;

The cross-sections of the two connecting curved rods 13 are in the shape of an upward arch.

The new energy vehicle includes the vehicle steering system described in claims 1-9.

Usage principle and advantages: During the use of the present invention, all parts are installed on the new energy vehicle. The steering system in the new energy vehicle is composed of two parts: the direction control end and the steering structure end. It needs to be indicated that: the direction control end There is no mechanical structure connection with the steering structure end, for example, there is no need to install universal joints, transmission rods and other parts;

During the installation process, it is ensured that the strokes of the two assembly hydraulic cylinders 6 are equal, and the arrangement of the two assembly hydraulic cylinders 6 is just mirror-symmetrical distribution along the middle plane of the two front driving wheels 1;

During the driving of the new energy vehicle, the driver controls the steering wheel to rotate a certain angle in a certain direction, and the direction transmission lever 4 transmits the force on the steering wheel to the torque sensor 5, which is converted into an electrical signal, and the electrical signal is transmitted. Go to the center console of the new energy vehicle, and use this electrical signal as the operation basis of the two assembly hydraulic cylinders 6. For example, when the new energy vehicle turns to the left, the two assembly transverse tie rods 7 are in the assembly hydraulic cylinder. Under the action of 6, the two front driving wheels 1 are pulled to deflect to the left to realize the steering action;

During the displacement process of the assembly transverse pull rod 3, the displacement transmission rod 18 at the corresponding position moves with the assembly transverse pull rod 3, and the displacement change equivalent of the displacement transmission rod 18 is received by the displacement sensor 21, because the two displacement sensors 21 are mirror images. distribution, so that the displacement sensor 21 at the corresponding position can directly receive and feed back the movement stroke amount of the hydraulic cylinder 6 of the assembly;

In the above process, because the bumpy feeling generated by the car during the driving process will directly affect the influence of the positioning connecting rod 17 on the displacement transmission rod 18, a buffer relief plate 16 is added between the positioning connecting rod 17 and the mounting plate 12, And because the rolling ball 20 and the ball sleeve 23 are arranged between the buffer force relief plate 16 and the positioning connecting rod 17 , the buffer force relief plate 16 can meet the impact force in multiple directions, and reciprocate up and down with the center position of the mounting plate 12 . , to buffer the impact force to protect the displacement transmission rod 18;

During the lateral movement of the displacement transmission rod 18 , the two mounting plates 12 and the assembly sliding block 14 are formed as a whole by the connecting curved rod 13 , and the second buffer spring 19 is used again to buffer the impact generated during the sudden rotation. force;

During driving, the displacement sensor 21 at the two positions feeds back the stroke amount of the assembly hydraulic cylinder 6 at the two positions, and the difference between the two stroke amounts is fed back to the torque sensor 5, so that in the subsequent steering During the process, the difference between the stroke amounts will also be taken into account to ensure the steering temperature, and after the ignition is turned off, the two assembly hydraulic cylinders 6 will be re-engineered based on the electrical signal of the torque sensor 5 and the difference in the stroke amount. After calibration, the stepper motor 9 is started, and the driving gear plate 10 is driven to rotate through the cooperating gear plate 8 to recalibrate the steering wheel on the directional transmission rod 4 .

The above description is only a preferred embodiment of the present invention, but the protection scope of the present invention is not limited to this. The equivalent replacement or change of the inventive concept thereof shall be included within the protection scope of the present invention.

Claims (10)

1. A vehicle steering system, characterized in that the vehicle steering system includes two parts: a direction control end and a steering structure end, and the steering structure end comprises two symmetrically distributed driving front wheels (1) to A front drive crossbar (2) is arranged at the middle of the two driving front wheels (1), and an assembly hydraulic cylinder (6) is arranged on one side of the front drive crossbar (2). The cylinders (6) are distributed and fixed on the chassis of the vehicle in a mirror-symmetrical distribution along the center plane of the two driving front wheels (1), and an assembly transverse tie rod is fixedly installed on the output end positions of the two assembly hydraulic cylinders (6). (3), the two ends of the transverse tie rods (3) of the assembly are hinged with the two driving front wheels (1); The direction control end is composed of a direction transmission rod (4) and a torque sensor (5). The direction transmission rod (4) is fixedly connected with the output shaft on the torque sensor (5). There is no mechanical structural connection between the two major parts of the end and the end of the steering structure. 2 . The vehicle steering system according to claim 1 , wherein a drive gear plate ( 10 ) is fixedly installed on the end position of the direction transmission rod ( 4 ), and one side of the torque sensor ( 5 ) is fixed. 3 . A stepper motor (9) is arranged at the position, and a cooperating gear plate (8) is fixedly installed on the output shaft of the stepper motor (9). The cooperating gear plate (8) and the driving gear plate (10) are meshing. 3. A vehicle steering system according to claim 1, characterized in that a displacement sensor (21) is fixedly installed on the upper end positions of the two assembly hydraulic cylinders (6), and the displacement sensor (21) A displacement transmission rod (18) is fixedly installed on the output shaft of the motor, and a positioning connecting rod (17) is arranged at the end of the displacement transmission rod (18), and the two positioning connecting rods (17) are installed on the transverse pull rod ( 3) on. 4. A vehicle steering system according to claim 1, characterized in that, a dust cover (7) is provided on the transverse tie rod (3) of the assembly, and one end of the dust cover (7) is mounted on the assembly into the hydraulic cylinder (6), and the other end of the dust cover (7) is mounted on the transverse tie rod (3) of the assembly. 5. A vehicle steering system according to claim 3, characterized in that, a mounting plate (12) is fixedly mounted on the end position of each of the displacement transmission rods (18), and a lower end of the mounting plate (12) is provided There is a buffer force relief plate (16), and the middle position of the buffer force relief plate (16) and the lower surface of the mounting plate (12) are rotationally connected. 6. A vehicle steering system according to claim 5, characterized in that, first buffer springs (15) are fixedly installed at both ends of the upper surface of the buffer force relief plate (16), and two of the first buffer springs (15) are fixedly installed at both ends of the upper surface of the buffer force relief plate (16). The upper end of a buffer spring (15) is mounted on the lower surface of the mounting plate (12). 7 . The vehicle steering system according to claim 5 , wherein a ball sleeve ( 23 ) is fixedly installed at the center of the lower surface of the buffer force relief plate ( 16 ), and the upper end of the positioning connecting rod ( 17 ) is fixedly installed. 8 . A rolling ball (20) is welded at the position, and the rolling ball (20) and the ball sleeve (23) are slidably connected. 8 . The vehicle steering system according to claim 1 , wherein a support plate ( 11 ) is fixedly installed on the upper ends of the two assembly hydraulic cylinders ( 6 ), and the two support plates ( 11 ). 9 . An assembly sliding rod (22) is fixedly installed between the upper end positions, an assembly sliding block (14) is slidably installed on the assembly sliding rod (22), and the assembly sliding block (14) is connected to the mounting plate (12). ) is fixedly installed with a connecting curved rod (13). 9 . The vehicle steering system according to claim 8 , wherein a second buffer spring is provided on the circumferential outer wall of the assembly sliding rod ( 22 ) at both ends of the assembly sliding block ( 14 ). 10 . (19); The cross-sections of the two connecting curved rods (13) are in the shape of an upward arch. 10. A new energy vehicle according to claims 1-9, characterized in that, the new energy vehicle comprises the vehicle steering system described in claims 1-9.

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