CN116767339A - Electric power-assisted wheel steering device - Google Patents
Electric power-assisted wheel steering device Download PDFInfo
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- CN116767339A CN116767339A CN202310764179.7A CN202310764179A CN116767339A CN 116767339 A CN116767339 A CN 116767339A CN 202310764179 A CN202310764179 A CN 202310764179A CN 116767339 A CN116767339 A CN 116767339A
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- knuckle
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- 230000005540 biological transmission Effects 0.000 claims abstract description 40
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 16
- 230000009467 reduction Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
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- 230000006855 networking Effects 0.000 description 1
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Abstract
The invention relates to the technical field of automobile steering, and discloses an electric power-assisted wheel steering device which comprises a vehicle body, wheels, an electric unit fixedly connected with the vehicle body, a transmission shaft in transmission connection with the output end of the electric control unit, a speed reducer in transmission connection with the transmission shaft, and a steering knuckle in transmission connection with the speed reducer, wherein the steering knuckle is fixedly connected with the wheels, and a swing arm is arranged between the speed reducer and the vehicle body. The invention adopts a mode of directly driving wheels to turn by gears, and the turning is more accurate.
Description
Technical Field
The invention relates to the technical field of automobile steering, in particular to an electric power-assisted wheel steering device.
Background
The China automobile industry is rapidly developing towards electric, intelligent and networking (called 'three-way') and new energy automobiles are rapidly developing, the size of the automobile body is larger and larger, various middle and large-sized cars and SUVs are more than 5m in succession, but conversely, the requirements of various large OEM manufacturers on the operability and safety of the new energy automobiles are higher and higher, and the technology is one of active chassis control technologies which are most effective in improving the automobile operability and improving the active safety. Four-wheel steering (4 WS) technology is an important component of active chassis control systems, and is a development trend of modern vehicles to improve steering stability and active safety.
The four-wheel steering system has the following remarkable advantages:
firstly, the vehicle mass center side deflection angle can be basically kept to be zero during steering, the dynamic response characteristic of the automobile to the input of the steering wheel can be improved, the transient response performance indexes of yaw rate and lateral acceleration are improved to a certain extent, and the stability of high-speed running of the vehicle is obviously improved. When steering in high-speed running, the four-wheel steering system can effectively reduce/eliminate the occurrence probability of side slip accidents of the vehicle through in-phase steering of the rear wheels and the front wheels, obviously improve the stability and safety of the high-speed running of the vehicle, and further relieve the fatigue degree of a driver in high-speed driving under various road conditions (especially in weather).
Next, the turning radius at the time of low-speed steering of the vehicle is reduced. In low-speed steering, the turning radius of the vehicle can be reduced by 20% due to the reverse steering of the front and rear wheels. Four-wheel steering technology gives large vehicles steering and parking agility as small vehicles.
Again, the trailer capacity of the vehicle is improved. The four-wheel steering system greatly improves the follow-up property and the correctness of steering operation and improves the steering property, the stability and the safety of the running of the vehicle trailer through the steering traction of the steering rear axle to the trailer. Therefore, the development of the four-wheel electric power steering system with high load and low cost has certain feasibility and necessity.
Disclosure of Invention
The invention aims to provide an electric power-assisted wheel steering device which has the effects of lower manufacturing cost and more accurate steering.
The technical aim of the invention is realized by the following technical scheme: the utility model provides an electric power assisted wheel limit steering device, includes automobile body, wheel, with automobile body fixed connection's electric unit, with the transmission shaft of electric control unit output transmission connection, with the reduction gear of transmission shaft transmission connection, with the knuckle of reduction gear transmission connection, knuckle and wheel fixed connection, be provided with the swing arm between reduction gear and the automobile body.
Through adopting above-mentioned technical scheme, when need turn to, the electronic unit drive transmission shaft rotates, and the transmission shaft drives the motion of reduction gear, and the reduction gear drives the knuckle and rotates to drive the wheel deflection, thereby accomplish the turning to of wheel.
As a further arrangement of the invention, the speed reducer comprises a shell, a driving shaft is rotatably connected to the shell, one end of the driving shaft is coaxially provided with an inclined cone pinion, the inclined cone pinion is meshed with an inclined cone gear disc, the inclined cone gear disc is coaxially and fixedly connected with an output shaft, the output shaft is rotatably connected with the shell, the inclined cone gear disc is connected with a steering knuckle, one end of a swing arm is rotatably connected with the shell, and the other end of the swing arm is rotatably connected with a vehicle body.
Through adopting above-mentioned technical scheme, when electric unit drove the transmission shaft and rotates, power input arrives bevel pinion, and bevel pinion drives bevel gear dish rotation, drives the knuckle and rotates when bevel gear dish rotates, and the knuckle drives the wheel and rotates to accomplish the wheel and turn to.
As a further arrangement of the invention, the outer side of the bevel gear disk is fixedly provided with a spline, the inner side of the steering knuckle is provided with a spline groove matched with the spline of the bevel gear disk, and the spline is slidably arranged in the spline groove.
As a further arrangement of the invention, an opening is formed in one side of the shell, facing the wheels, and is used for installing the steering knuckle, the side wall of the opening is in a circular arc shape matched with the steering knuckle, and the circular arc-shaped side wall of the opening is attached to the steering knuckle.
As a further arrangement of the invention, the transmission shaft comprises a shaft sleeve and a shaft rod, wherein a spline groove is formed in the shaft sleeve along the length direction of the shaft sleeve, a spline is arranged on the shaft rod along the length direction, the spline is slidably arranged in the spline groove, the shaft sleeve is connected with the driving shaft, and the shaft rod is connected with the output end of the electric control unit.
As a further arrangement of the invention, a universal joint is arranged between the shaft sleeve and the drive shaft and between the shaft lever and the output end of the electronic control unit.
The beneficial effects of the invention are as follows:
the invention drives the transmission shaft to rotate through the independent electric unit, and drives the steering knuckle to rotate through the bevel gear transmission mode, thereby completing the steering of the wheels, having simple structure and lower manufacturing cost, and the transmission is more direct, the transmission efficiency is higher, the rotation is more accurate through the bevel gear transmission mode,
drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of the overall structure of the present embodiment;
FIG. 2 is a schematic diagram of the structure of the decelerator of the present embodiment;
FIG. 3 is a schematic diagram of the structure of the decelerator of the present embodiment;
fig. 4 is a schematic diagram of the internal structure of the decelerator of the present embodiment;
FIG. 5 is a schematic view of the structure of the transmission shaft of the present embodiment;
in the figure, 1, a vehicle body, 2, wheels, 3, an electric unit, 4, a transmission shaft, 41, a shaft sleeve, 42, a shaft lever, 5, a speed reducer, 51, a shell, 52, a driving shaft, 53, a bevel pinion, 54, a bevel gear disc, 55, an output shaft, 6, a steering knuckle, 7, a swing arm, 8 and a universal joint.
Detailed Description
The technical scheme of the present invention will be clearly and completely described in connection with specific embodiments. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to fall within the scope of the invention.
Examples
An electric power-assisted wheel steering device, referring to fig. 1 to 5, comprises a vehicle body 1, wheels 2, an electric unit 3 fixedly connected with the vehicle body 1, a transmission shaft 4 in transmission connection with the output end of the electric unit, a speed reducer 5 in transmission connection with the transmission shaft 4, a steering knuckle 6 in transmission connection with the speed reducer 5, wherein the steering knuckle 6 is fixedly connected with the wheels 2, and a swing arm 7 is arranged between the speed reducer 5 and the vehicle body 1.
When steering is needed, the electric unit 3 drives the transmission shaft 4 to rotate, the transmission shaft 4 drives the speed reducer 5 to move, and the speed reducer 5 drives the steering knuckle 6 to rotate, so that the wheels 2 are driven to deflect, and steering of the wheels 2 is completed.
Further, the speed reducer 5 includes a housing 51, a driving shaft 52 is rotatably connected to the housing 51, an oblique bevel pinion 53 is coaxially disposed at one end of the driving shaft 52, an oblique bevel gear disc 54 is meshed with the oblique bevel pinion 53, an output shaft 55 is coaxially and fixedly connected to the oblique bevel gear disc 54, the output shaft 55 is rotatably connected to the housing 51, the oblique bevel gear disc 54 is connected to the knuckle 6, one end of the swing arm 7 is rotatably connected to the housing 51, and one end of the swing arm 7 is rotatably connected to the vehicle body 1.
When the electric unit 3 drives the transmission shaft 4 to rotate, power is input to the bevel pinion 53, the bevel pinion 53 drives the bevel gear disc 54 to rotate, the bevel gear disc 54 drives the knuckle 6 to rotate when rotating, and the knuckle 6 drives the wheel 2 to rotate, so that the steering of the wheel 2 is completed.
Further, the spline is fixedly arranged on the outer side of the bevel gear disc 54, the spline groove matched with the spline of the bevel gear disc 54 is formed in the inner side of the steering knuckle 6, the spline is slidably arranged in the spline groove, and axial displacement between the steering knuckle 6 and the bevel gear disc 54 can be ensured to be achieved, so that vibration inside an automobile can be handled, and the structure is more stable.
Further, the opening is offered towards wheel 2 one side to casing 51, and the opening is used for installing knuckle 6, and the open-ended lateral wall is with knuckle 6 assorted convex, and the convex lateral wall of opening is laminated with knuckle 6, and this structure can support knuckle 6 for overall structure is more stable.
Further, the transmission shaft 4 includes axle sleeve 41 and axostylus axostyle 42, the axle sleeve 41 is inside to be provided with the spline along axle sleeve 41 length direction, be provided with the spline along length direction on the axostylus axostyle 42, the spline slides and sets up in the spline groove, axle sleeve 41 links to each other with drive shaft 52, axostylus axostyle 42 links to each other with the output of automatically controlled unit, in the car operation in-process, can take place relative motion between wheel 2 and the automobile body 1, thereby can lead to the interval between electric unit 3 and the reduction gear 5 to change, transmission shaft 4 sets up to telescopic structure, when can guarantee the better transmission power of transmission shaft 4, self stability is better.
Further, a universal joint 8 is provided between the sleeve 41 and the drive shaft 52, and between the shaft 42 and the output of the electronic control unit.
The working principle of this embodiment is as follows:
when the automobile works, the power unit transmits power into the gear reducer 5 through the transmission shaft 4, the bevel pinion 53 drives the bevel gear wheel to rotate, the bevel gear wheel drives the output shaft 55 to rotate to transmit power into the wheel rim, the wheel 2 is enabled to rotate, and the steering direction and the turning angle of the wheel 2 are controlled through the rotation direction of the gear and the rotation quantity of the gear.
Claims (6)
1. An electric power assisted wheel rim steering device is characterized in that: the electric vehicle comprises a vehicle body (1), wheels (2), an electric unit (3) fixedly connected with the vehicle body (1), a transmission shaft (4) in transmission connection with the output end of the electric control unit, a speed reducer (5) in transmission connection with the transmission shaft (4), and a steering knuckle (6) in transmission connection with the speed reducer (5), wherein the steering knuckle (6) is fixedly connected with the wheels (2), and a swing arm (7) is arranged between the speed reducer (5) and the vehicle body (1).
2. An electric power assisted wheel side steering apparatus according to claim 1, wherein: the speed reducer (5) comprises a shell (51), a driving shaft (52) is rotationally connected to the shell (51), an inclined bevel pinion (53) is coaxially arranged at one end of the driving shaft (52), an inclined bevel gear disc (54) is meshed with the inclined bevel pinion (53), an output shaft (55) is coaxially fixedly connected to the inclined bevel gear disc (54), the output shaft (55) is rotationally connected with the shell (51), the inclined bevel gear disc (54) is connected with a steering knuckle (6), one end of a swing arm (7) is rotationally connected with the shell (51), and the other end of the swing arm is rotationally connected with a vehicle body (1).
3. An electric power assisted wheel side steering apparatus according to claim 2, wherein: the outer side of the bevel gear disc (54) is fixedly provided with a spline, the inner side of the knuckle (6) is provided with a spline groove matched with the spline of the bevel gear disc (54), and the spline is slidably arranged in the spline groove.
4. An electric power assisted wheel side steering apparatus according to claim 2, wherein: an opening is formed in one side, facing the wheels (2), of the shell (51), the opening is used for installing the steering knuckle (6), the side wall of the opening is in a circular arc shape matched with the steering knuckle (6), and the circular arc-shaped side wall of the opening is attached to the steering knuckle (6).
5. An electric power assisted wheel side steering apparatus according to claim 2, wherein: the transmission shaft (4) comprises a shaft sleeve (41) and a shaft lever (42), spline grooves are formed in the shaft sleeve (41) in the length direction of the shaft sleeve (41), splines are arranged on the shaft lever (42) in the length direction, the splines are slidably arranged in the spline grooves, the shaft sleeve (41) is connected with a driving shaft (52), and the shaft lever (42) is connected with the output end of an electric control unit.
6. An electric power assisted wheel side steering apparatus according to claim 5, wherein: a universal joint (8) is arranged between the shaft sleeve (41) and the driving shaft (52) and between the shaft rod (42) and the output end of the electric control unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310764179.7A CN116767339A (en) | 2023-06-26 | 2023-06-26 | Electric power-assisted wheel steering device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310764179.7A CN116767339A (en) | 2023-06-26 | 2023-06-26 | Electric power-assisted wheel steering device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116767339A true CN116767339A (en) | 2023-09-19 |
Family
ID=87990988
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310764179.7A Pending CN116767339A (en) | 2023-06-26 | 2023-06-26 | Electric power-assisted wheel steering device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116767339A (en) |
-
2023
- 2023-06-26 CN CN202310764179.7A patent/CN116767339A/en active Pending
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