CN116968803A - Electric power steering gear for wheel side steering - Google Patents
Electric power steering gear for wheel side steering Download PDFInfo
- Publication number
- CN116968803A CN116968803A CN202310764189.0A CN202310764189A CN116968803A CN 116968803 A CN116968803 A CN 116968803A CN 202310764189 A CN202310764189 A CN 202310764189A CN 116968803 A CN116968803 A CN 116968803A
- Authority
- CN
- China
- Prior art keywords
- pull rod
- steering
- electric power
- shaft sleeve
- screw
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000428 dust Substances 0.000 claims description 7
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 description 4
- 230000004044 response Effects 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000006855 networking Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D5/00—Power-assisted or power-driven steering
- B62D5/04—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear
- B62D5/0421—Electric motor acting on or near steering gear
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D3/00—Steering gears
- B62D3/02—Steering gears mechanical
- B62D3/04—Steering gears mechanical of worm type
- B62D3/06—Steering gears mechanical of worm type with screw and nut
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D7/00—Steering linkage; Stub axles or their mountings
- B62D7/02—Steering linkage; Stub axles or their mountings for pivoted bogies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D7/00—Steering linkage; Stub axles or their mountings
- B62D7/18—Steering knuckles; King pins
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D7/00—Steering linkage; Stub axles or their mountings
- B62D7/20—Links, e.g. track rods
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Power Steering Mechanism (AREA)
Abstract
The invention relates to the technical field of automobile steering, and discloses an electric power steering gear for wheel side steering, which is characterized in that: the automobile steering device comprises a shell connected with an automobile body, a screw is arranged in the shell in a rotating mode, a shaft sleeve is fixedly connected to a screw nut of the screw, an inner pull rod is connected to one end of the shaft sleeve, an outer pull rod is connected to the inner pull rod, the outer pull rod is connected with a steering knuckle connected with an automobile wheel, and an electric control unit is connected to the screw. The invention adopts the screw rod and the screw rod nut transmission pair, and has high transmission efficiency and good rigidity.
Description
Technical Field
The invention relates to the technical field of automobile steering, in particular to an electric power steering gear for wheel side steering.
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 steering gear for wheel side steering, which has the effects of high transmission efficiency and good rigidity.
The technical aim of the invention is realized by the following technical scheme: the utility model provides a wheel limit turns to electric power steering ware, includes the casing of being connected with the automobile body, the inside rotation of casing is provided with the lead screw, fixedly connected with axle sleeve on the lead screw nut of lead screw, the one end of axle sleeve is connected with interior pull rod, interior pull rod is connected with outer pull rod, outer pull rod links to each other with the knuckle of being connected with the automobile wheel, the lead screw is connected with electronic control unit.
Through adopting above-mentioned technical scheme, when the car needs to turn to, the electronic control unit drives the lead screw and rotates, and the direction that turns to according to needs drives lead screw forward rotation or reverse rotation, and the lead screw drives lead screw nut reciprocating motion, and lead screw nut drives the axle sleeve and removes, and the axle sleeve then drives interior pull rod and removes, and interior pull rod then drives outer pull rod, and outer pull rod then pulls the knuckle and deflects, and the knuckle then drives the wheel and deflect to accomplish the wheel and turn to.
As a further arrangement of the invention, a coupling is arranged between the output end of the electric unit and the end of the screw.
As a further arrangement of the invention, the sleeve is slidingly connected to the housing.
As a further arrangement of the invention, the shaft sleeve is of a cylindrical structure with one end open, the shaft sleeve is coaxially sleeved on the outer side of the screw rod, one end of the opening of the shaft sleeve is fixedly connected with the screw nut of the screw rod, and one end of the closed end of the shaft sleeve is connected with the inner pull rod.
As a further arrangement of the invention, a universal ball joint is arranged between the shaft sleeve and the inner pull rod.
As a further arrangement of the invention, a dust cover is fixedly arranged on one side of the shell, which is close to the outer pull rod, and one end of the dust cover is fixedly connected with the inner pull rod.
The beneficial effects of the invention are as follows:
the structure adopts the screw rod and the screw rod nut transmission pair, so that the transmission efficiency is high, the rigidity is good, and the structure is more stable; the structure is small in size and space arrangement is more advantageous. The structure is easier to process and assemble during production.
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 view of the steering gear of the present embodiment;
FIG. 3 is a schematic view showing the sectional structure of the present embodiment;
in the figure, 1, a shell, 2, a lead screw, 3, a shaft sleeve, 4, an inner pull rod, 5, an outer pull rod, 6, a steering knuckle, 7, an electric control unit, 8, a coupling, 9, a universal ball joint, 10 and a dust cover.
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
Referring to fig. 1 to 3, the electric power steering gear for wheel side steering comprises a shell 1 connected with a vehicle body, a screw rod 2 is rotatably arranged in the shell 1, a shaft sleeve 3 is fixedly connected to a screw rod 2 nut of the screw rod 2, one end of the shaft sleeve 3 is connected with an inner pull rod 4, the inner pull rod 4 is connected with an outer pull rod 5, the outer pull rod 5 is connected with a steering knuckle 6 connected with a vehicle wheel, and the screw rod 2 is connected with an electric control unit 7.
When the automobile is required to turn, the electronic control unit 7 drives the screw rod 2 to rotate, the screw rod 2 is driven to rotate forward or reversely according to the direction required to turn, the screw rod 2 drives the screw rod 2 nut to reciprocate, the screw rod 2 nut drives the shaft sleeve 3 to move, the shaft sleeve 3 drives the inner pull rod 4 to move, the inner pull rod 4 drives the outer pull rod 5, the outer pull rod 5 pulls the steering knuckle 6 to deflect, and the steering knuckle 6 drives the wheels to deflect, so that the steering of the wheels is completed.
Further, a coupling 8 is provided between the output of the electromotive unit and the end of the screw shaft 2.
Further, the sleeve 3 is slidably connected to the housing 1.
Further, the shaft sleeve 3 is of a cylindrical structure with one open end, the shaft sleeve 3 is connected with the outer side of the screw rod 2 in a coaxial manner, one open end of the shaft sleeve 3 is fixedly connected with a screw rod 2 nut of the screw rod 2, and one closed end of the shaft sleeve 3 is connected with the inner pull rod 4.
Further, a universal ball joint 9 is arranged between the shaft sleeve 3 and the inner pull rod 4.
Further, a dust cover 10 is fixedly arranged on one side of the outer shell, which is close to the outer pull rod 5, and one end of the dust cover 10 is fixedly connected with the inner pull rod 4.
Claims (6)
1. An electric power steering device for steering a wheel edge is characterized in that: including casing (1) of being connected with the automobile body, the inside rotation of casing (1) is provided with lead screw (2), fixedly connected with axle sleeve (3) on lead screw (2) nut of lead screw (2), the one end of axle sleeve (3) is connected with interior pull rod (4), interior pull rod (4) are connected with outer pull rod (5), outer pull rod (5) link to each other with knuckle (6) of being connected with the automobile wheel, lead screw (2) are connected with electrical control unit (7).
2. A rim-steering electric power steering gear as set forth in claim 1, wherein: a coupling (8) is arranged between the output end of the electric unit and the end part of the screw rod (2).
3. A rim-steering electric power steering gear as set forth in claim 1, wherein: the shaft sleeve (3) is in sliding connection with the shell (1).
4. A rim-steering electric power steering gear as set forth in claim 1, wherein: the shaft sleeve (3) is of a cylindrical structure with one open end, the shaft sleeve (3) is coaxially sleeved on the outer side of the screw rod (2), one open end of the shaft sleeve (3) is fixedly connected with a screw rod (2) nut of the screw rod (2), and one closed end of the shaft sleeve (3) is connected with the inner pull rod (4).
5. A wheel side steering electric power steering apparatus according to claim 4, wherein: a universal ball joint (9) is arranged between the shaft sleeve (3) and the inner pull rod (4).
6. A rim-steering electric power steering gear as set forth in claim 1, wherein: one side of the shell, which is close to the outer pull rod (5), is fixedly provided with a dust cover (10), and one end of the dust cover (10) is fixedly connected with the inner pull rod (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310764189.0A CN116968803A (en) | 2023-06-26 | 2023-06-26 | Electric power steering gear for wheel side steering |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310764189.0A CN116968803A (en) | 2023-06-26 | 2023-06-26 | Electric power steering gear for wheel side steering |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116968803A true CN116968803A (en) | 2023-10-31 |
Family
ID=88484026
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310764189.0A Pending CN116968803A (en) | 2023-06-26 | 2023-06-26 | Electric power steering gear for wheel side steering |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116968803A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20120062272A (en) * | 2010-12-06 | 2012-06-14 | 현대자동차주식회사 | Rear steering system of vehicle |
| CN203612044U (en) * | 2013-12-02 | 2014-05-28 | 北京汽车股份有限公司 | Car rack assisted electric power steering system |
| CN204548218U (en) * | 2015-03-23 | 2015-08-12 | 重庆科鑫三佳车辆技术有限公司 | Automobile electric booster steering system |
| CN107651005A (en) * | 2017-09-30 | 2018-02-02 | 江苏大学 | The electro-hydraulic mixing servo steering system and its control method of a kind of four-wheel walking machine |
| CN208897161U (en) * | 2018-09-29 | 2019-05-24 | 杭州镝创汽车零部件有限责任公司 | The scalable straight push-and-pull electric control multi-stage diverter of one kind and its vehicle |
| CN110871841A (en) * | 2019-12-16 | 2020-03-10 | 北京理工大学 | Push-down electric power steering device for commercial vehicle |
-
2023
- 2023-06-26 CN CN202310764189.0A patent/CN116968803A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20120062272A (en) * | 2010-12-06 | 2012-06-14 | 현대자동차주식회사 | Rear steering system of vehicle |
| CN203612044U (en) * | 2013-12-02 | 2014-05-28 | 北京汽车股份有限公司 | Car rack assisted electric power steering system |
| CN204548218U (en) * | 2015-03-23 | 2015-08-12 | 重庆科鑫三佳车辆技术有限公司 | Automobile electric booster steering system |
| CN107651005A (en) * | 2017-09-30 | 2018-02-02 | 江苏大学 | The electro-hydraulic mixing servo steering system and its control method of a kind of four-wheel walking machine |
| CN208897161U (en) * | 2018-09-29 | 2019-05-24 | 杭州镝创汽车零部件有限责任公司 | The scalable straight push-and-pull electric control multi-stage diverter of one kind and its vehicle |
| CN110871841A (en) * | 2019-12-16 | 2020-03-10 | 北京理工大学 | Push-down electric power steering device for commercial vehicle |
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