CN220180914U - Wheel-side electric power steering gear - Google Patents
Wheel-side electric power steering gear Download PDFInfo
- Publication number
- CN220180914U CN220180914U CN202321638470.1U CN202321638470U CN220180914U CN 220180914 U CN220180914 U CN 220180914U CN 202321638470 U CN202321638470 U CN 202321638470U CN 220180914 U CN220180914 U CN 220180914U
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- wheel
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- rack
- shell
- pull rod
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- 230000005540 biological transmission Effects 0.000 claims abstract description 18
- 230000007246 mechanism Effects 0.000 claims abstract description 14
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 10
- 239000000428 dust Substances 0.000 claims description 9
- 230000009467 reduction Effects 0.000 claims description 8
- 238000005516 engineering process Methods 0.000 description 5
- 230000000694 effects Effects 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
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000006855 networking Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
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Abstract
The utility model relates to the technical field of automobile steering, and discloses a wheel-side electric power steering gear, which comprises a shell, wherein a rack is arranged in the shell in a sliding manner, one end of the rack is connected with a pull rod, one end of the pull rod is connected with a steering knuckle connected with an automobile wheel, the rack is connected with a driving mechanism for driving the rack to slide back and forth in the shell, the driving mechanism comprises an electric control unit, a speed reducer connected with the electric control unit, and a transmission worm connected with the output end of the speed reducer, and the transmission worm is meshed with the rack. The four-wheel independent driving automobile steering device disclosed by the utility model is used for steering.
Description
Technical Field
The utility model relates to the technical field of automobile steering, in particular to a wheel-side electric power steering gear.
Background
Along with the rapid development of the China automobile industry towards electric, intelligent and networking (called 'three for short') under the guidance of the national 'double-carbon' target, new energy automobiles are also developed at a high speed, the size of the automobile body is larger and larger, various middle-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 the four-wheel steering technologies serving as the most effective active chassis control technology for improving the automobile drivability and one of the methods for 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 utility model aims to provide a wheel-side electric power steering gear which has the effects of four-wheel independent steering and compact structure.
The technical aim of the utility model is realized by the following technical scheme: the utility model provides an electronic power assisted steering ware of wheel limit, includes the casing, the inside slip of casing is provided with the rack, the one end of rack is connected with the pull rod, the one end of pull rod links to each other with the knuckle that is connected with the auto wheel, the rack is connected with the drive mechanism that drives its inside reciprocal slip of casing, drive mechanism includes the automatically controlled unit, the reduction gear that is connected with the automatically controlled unit, the drive worm that is connected with the reduction gear output, drive worm and rack engagement.
Through adopting above-mentioned technical scheme, when the car needs the steering, the driver sends the instruction, and after the electronic control unit received the instruction, drive reduction gear motion, reduction gear drive transmission worm rotates to through control transmission worm forward or reverse rotation, thereby make transmission worm drive rack extension or shrink, thereby pulling or promote the pull rod, the pull rod drives the wheel deflection through pushing or pulling knuckle.
As a further arrangement of the utility model, the speed reducer comprises a shell, a worm wheel and a worm which are meshed with each other are rotatably arranged in the shell, the output end of the electric control unit is connected with one end of the worm, and the worm wheel is coaxially and fixedly connected with the transmission worm.
Through adopting above-mentioned technical scheme, adopt worm gear transmission, can increase steering force to guarantee that sufficient power drive wheel turns to, turn to more accurate and stable.
As a further arrangement of the utility model, the side surface of the shell, which is positioned on the rack, is provided with a supporting seat, the supporting seat is propped against the back of the rack, the shell is detachably provided with an adjusting screw plug, and a spring is arranged between the adjusting screw plug and the supporting seat.
Through adopting above-mentioned technical scheme, through setting up supporting seat and spring, can cushion the rack, guarantee simultaneously that drive worm and rack can fully engage, can not produce the clearance.
As a further arrangement of the utility model, one end of the worm is provided with a backlash-compensating mechanism.
As a further arrangement of the utility model, a dust cover is arranged on one side of the shell, which is positioned on one side of the pull rod, one end of the dust cover is fixedly connected with one end of the pull rod, and the other end of the dust cover is fixedly connected with the shell.
The beneficial effects of the utility model are as follows:
when the automobile needs to turn, a driver sends out an instruction, the electronic control unit receives the instruction and then drives the speed reducer to move, the speed reducer drives the transmission worm to rotate, and the transmission worm is controlled to rotate forwards or backwards, so that the transmission worm drives the rack to stretch or shrink, and the pull rod is pulled or pushed, and the pull rod drives the wheels to deflect by pushing or pulling the steering knuckle, so that four-wheel independent steering is realized; meanwhile, the independent steering structure is compact in arrangement, good in transmission effect and more stable in structure.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, 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 utility model, 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 a connection structure between the present embodiment and a wheel;
FIG. 2 is a schematic view of the whole sectional structure of the present embodiment;
FIG. 3 is a schematic view showing the sectional structure of the present embodiment;
fig. 4 is a schematic view of the worm gear structure of the present embodiment;
in the figure, 1, a shell, 2, a rack, 3, a pull rod, 4, a knuckle, 5, an electric control unit, 6, a speed reducer, 61, a shell, 62, a worm wheel, 63, a worm, 7, a transmission worm, 81, a supporting seat, 82, an adjusting screw plug, 83, a spring, 9 and a dust cover.
Detailed Description
The technical scheme of the present utility model 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 utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to fall within the scope of the utility model.
Examples
The utility model provides an electric power steering gear of wheel limit, refers to fig. 1 through 4, including casing 1, the inside slip of casing 1 is provided with rack 2, the one end of rack 2 is connected with pull rod 3, the one end of pull rod 3 links to each other with the knuckle 4 that is connected with the auto wheel, rack 2 is connected with the drive mechanism that drives its inside reciprocal slip of casing 1, drive mechanism includes electrical control unit 5, the reduction gear 6 that is connected with electrical control unit 5, the drive worm 7 that is connected with reduction gear 6 output, drive worm 7 meshes with rack 2.
When the automobile needs to turn, a driver sends out an instruction, after receiving the instruction, the electronic control unit 5 drives the speed reducer 6 to move, the speed reducer 6 drives the transmission worm 7 to rotate, and the transmission worm 7 is controlled to rotate forwards or backwards, so that the transmission worm 7 drives the rack 2 to stretch or shrink, the pull rod 3 is pulled or pushed, and the pull rod 3 drives wheels to deflect by pushing or pulling the steering knuckle 4.
Further, the speed reducer 6 includes a housing 61, a worm wheel 62 and a worm 63 meshed with each other are rotatably disposed in the housing 61, an output end of the electronic control unit 5 is connected to one end of the worm 63, and the worm wheel 62 is fixedly connected to the driving worm 7 coaxially. The worm wheel 62 and the worm 63 are adopted for transmission, so that the steering force can be increased, and the sufficient power for driving the wheels to steer is ensured, and the steering is more accurate and stable.
Further, a supporting seat 81 is arranged on the side surface of the housing 1, located on the rack 2, the supporting seat 81 abuts against the back of the rack 2, an adjusting screw plug 82 is detachably arranged on the housing 61, and a spring 83 is arranged between the adjusting screw plug 82 and the supporting seat 81. By providing the support base 81 and the spring 83, the rack 2 can be buffered, and simultaneously, the transmission worm 7 and the rack 2 can be fully meshed without generating a gap.
Further, a backlash-compensating mechanism is provided at one end of the worm 63. The backlash-compensating mechanism is a compensating mechanism developed in the industry or a compensating mechanism of the prior art, and has the function of ensuring tight engagement between the worm 63 and the worm wheel 62 without backlash.
Further, the shell 1 is provided with a dust cover 9 on one side of the pull rod 3, one end of the dust cover 9 is fixedly connected with one end of the pull rod 3, and the other end is fixedly connected with the shell 1.
The working principle of this embodiment is as follows:
when the automobile needs to turn, the driver gives out an instruction, after receiving the instruction, the electronic control unit 5 drives the worm 63 to rotate, the worm 63 drives the worm wheel 62 to rotate, the worm wheel 62 drives the driving worm 7 to rotate, and the driving worm 7 is controlled to rotate forward or backward, so that the driving worm 7 drives the rack 2 to stretch or shrink, the pull rod 3 is pulled or pushed, and the pull rod 3 drives the wheels to deflect by pushing or pulling the steering knuckle 4.
Claims (5)
1. An electric power steering gear of wheel limit, its characterized in that: including casing (1), inside slip of casing (1) is provided with rack (2), the one end of rack (2) is connected with pull rod (3), the one end of pull rod (3) links to each other with knuckle (4) that are connected with the auto wheel, rack (2) are connected with the drive its inside reciprocating sliding actuating mechanism in casing (1), actuating mechanism includes electronic control unit (5), reduction gear (6) that are connected with electronic control unit (5), drive worm (7) that are connected with reduction gear (6) output, drive worm (7) and rack (2) meshing.
2. A wheel-side electric power steering apparatus according to claim 1, wherein: the speed reducer (6) comprises a shell (61), a worm wheel (62) and a worm (63) which are meshed with each other are rotatably arranged in the shell (61), the output end of the electric control unit (5) is connected with one end of the worm (63), and the worm wheel (62) is fixedly connected with the transmission worm (7) in a coaxial mode.
3. A wheel-side electric power steering apparatus according to claim 2, wherein: the shell (1) is located the side of rack (2) and is provided with supporting seat (81), supporting seat (81) offsets with the back of the tooth of rack (2), can dismantle on shell (61) and be provided with adjustment plug screw (82), be provided with spring (83) between adjustment plug screw (82) and supporting seat (81).
4. A wheel-side electric power steering apparatus according to claim 2, wherein: one end of the worm (63) is provided with a clearance compensation mechanism.
5. A wheel-side electric power steering apparatus according to claim 1, wherein: the shell (1) is provided with a dust cover (9) on one side of the pull rod (3), one end of the dust cover (9) is fixedly connected with one end of the pull rod (3), and the other end of the dust cover is fixedly connected with the shell (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321638470.1U CN220180914U (en) | 2023-06-26 | 2023-06-26 | Wheel-side electric power steering gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321638470.1U CN220180914U (en) | 2023-06-26 | 2023-06-26 | Wheel-side electric power steering gear |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220180914U true CN220180914U (en) | 2023-12-15 |
Family
ID=89105521
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321638470.1U Active CN220180914U (en) | 2023-06-26 | 2023-06-26 | Wheel-side electric power steering gear |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220180914U (en) |
-
2023
- 2023-06-26 CN CN202321638470.1U patent/CN220180914U/en active Active
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