CN203612044U - Car rack assisted electric power steering system - Google Patents
Car rack assisted electric power steering system Download PDFInfo
- Publication number
- CN203612044U CN203612044U CN201320778646.3U CN201320778646U CN203612044U CN 203612044 U CN203612044 U CN 203612044U CN 201320778646 U CN201320778646 U CN 201320778646U CN 203612044 U CN203612044 U CN 203612044U
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- housing
- screw rod
- motor
- rotor
- ball
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- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
The utility model provides a car rack assisted electric power steering system comprising a housing and a motor stator fixed in the middle part of the housing, wherein a motor rotor is arranged in the motor stator, the two ends of the motor rotor are connected with screws, respectively, one of the screws is matched with a cycle ball nut fixed in the housing through a rolling ball-lead screw structure, while the other one of the screws is matched with a rack arranged in the housing through the rolling ball-lead screw structure, the outer surface of the rack is engaged with an input shaft gear, the outer ends of the two screws are connected with a ball pin and a steering pull rod, respectively, and the input shaft gear drives the rack to move in the radial direction along the housing. The car rack assisted electric power steering system is compact in structure, firm, efficient and small in volume, and also high in output capacity and convenient to arrange in a cabin, and further can be widely applied to medium-sized and large-sized vehicles.
Description
Technical field
The utility model relates to automobile steering system technical field, refers to especially a kind of car rack booster type electric steering boost system.
Background technology
At present, electric boosting steering system has comparatively been widely applied on small and medium-sized car, tooth bar booster type (P-EPS) electric booster system can obtain larger rack drives power with respect to tubing string booster type (C-EPS) and miniature gears booster type (R-EPS), to be applied to relatively large vehicle.The motor of applying more tooth bar booster type electric force aid system is placed in deflector outside, by tooth-like belt or gear transmission, power is passed in deflector, then by the ball screw arrangement in deflector, rotation is converted to the crank motion of tooth bar.In addition, also have motor is integrated into the structure in deflector, rotor in this kind of structure adopts hollow structure, tooth bar is through quill shaft, on rotor with recirculating ball nut, tooth bar is provided with screw rod, and the ball screw framework coordinating by nut and screw rod changes into the rotation of hollow rotor the crank motion of tooth bar.
But, the structure of employing external motor, motor and speed reduction gearing volume are large, need to take larger machinery space space, are inconvenient to arrange.The electric machine structure complexity that adopts hollow rotor, cost is high; Because tooth bar need to pass quill shaft, radius should not be too large, and the maximum power output of tooth bar is restricted; This kind of structural electromotor can only adopt SMD permanent magnet DC motor, and because rotor adopts hollow structure, electrical efficiency is subject to great impact; When assist motor is when (power-off or motor break down) quits work for a certain reason, the reluctance torque that while turning to, motor produces can cause hard steering.
Utility model content
The technical problems to be solved in the utility model is to provide a kind of car rack booster type electric steering boost system, has solved steering boost system complex structure of the prior art, large, the problem such as high uses of cost is inconvenient takes up room.
For solving the problems of the technologies described above, embodiment of the present utility model provides a kind of car rack booster type electric steering boost system, comprise housing and be fixed on the motor stator at this housing middle part, in described motor stator, be provided with rotor, described rotor two ends connect respectively a screw rod, wherein described in one, screw rod matches with the recirculating ball nut being fixed in described housing by ball screw arrangement, described in another, screw rod matches with the tooth bar of being located in described housing by ball screw arrangement, described tooth bar outside face engages with input shaft gear, two described screw rod outer ends are connected with steering track rod by ball end respectively, described input shaft gear drives described tooth bar to move radially along described housing.
Wherein, the hinged place of described steering track rod and screw rod is provided with oversheath.
Wherein, described rotor and screw rod are one-body molded.
Wherein, in order to drive the motor that described rotor rotates to adopt switch magnetic group motor.
The beneficial effect of technique scheme of the present utility model is as follows:
In such scheme, assist motor is integrated into deflector inside, structure is more simple and reliable, is easy to arrange; Tooth bar is provided with ball-screw nut at two ends, stressed also more balanced; Owing to having cancelled hollow rotor, deflector inner structure is more simplified, identical shell, tooth bar diameter can be larger, thus the motor of equal torque can do more elongated, convenient layout on car load; Owing to adopting solid rotor, internal rotor magnetic circuit distributes better, and the efficiency of motor can significantly be promoted; Motor form is selected more flexible, can adopt SMD or interior permanent magnet machines, also can adopt the switched reluctance machines that rotor structure is more firm; Preferably adopt switched reluctance machines, this system will not need extra power-transfer clutch, system is more safe and reliable, because switch reluctance machine rotor does not have permanent magnet, when motor is when (power-off or motor break down) quits work for a certain reason, rotor rotates can not cause that reluctance torque causes hard steering.
Accompanying drawing explanation
Fig. 1 is the shaft side figure of the car rack booster type electric steering boost system of the utility model embodiment;
Fig. 2 is the section-drawing of the car rack booster type electric steering boost system of the utility model embodiment;
Fig. 3 is the ball screw arrangement figure of the car rack booster type electric steering boost system of the utility model embodiment.
［ main element nomenclature ］
1: housing;
2: tooth bar;
3: screw rod;
4: motor stator;
5: rotor;
6: recirculating ball nut;
7: steering track rod;
8: ball end;
9: input shaft gear;
10: steel ball;
11: oversheath.
The specific embodiment
For making the technical problems to be solved in the utility model, technical scheme and advantage clearer, be described in detail below in conjunction with the accompanying drawings and the specific embodiments.
The utility model, for steering boost system complex structure of the prior art, large, the problem such as high uses of cost is inconvenient that takes up room, provides a kind of car rack booster type electric steering boost system.
As shown in Figure 1 to Figure 3, the car rack booster type electric steering boost system that the utility model provides, comprise housing 1 and be fixed on the motor stator 4 at this housing 1 middle part, in described motor stator 4, be provided with rotor 5, described rotor 5 two ends connect respectively a screw rod 3, the one-body molded rack shaft of making of described rotor 5 and screw rod 3, wherein described in one, screw rod 3 matches with the recirculating ball nut 6 being fixed in described housing 1 by ball screw arrangement, described in another, screw rod 3 matches with the tooth bar 2 of being located in described housing 1 by ball screw arrangement, described tooth bar 2 outside faces engage with input shaft gear 9, two described screw rod 3 outer ends are connected with steering track rod 7 by ball end 8 respectively, described input shaft gear 9 drives described tooth bar 2 to move radially along described housing 1.The hinged place of described steering track rod 7 and screw rod 3 is provided with oversheath 11.
As shown in Figure 1, in order to drive the motor that described rotor 5 rotates to adopt switch magnetic group motor.Certainly, the selection of motor form can be more flexible, can also adopt SMD or interior permanent magnet machines.Adopt switched reluctance machines, this system will not need extra power-transfer clutch, system is more safe and reliable, because switch reluctance machine rotor does not have permanent magnet, when motor is when (power-off or motor break down) quits work for a certain reason, rotor rotates can not cause that reluctance torque causes hard steering.
This system work process is as follows:
In the time that chaufeur rotates steering handwheel, input shaft gear 9 is with carry-over bar 2 to move axially along housing 1, tooth bar 2 is connected by ball screw arrangement with the screw rod 3 on rack shaft, the movement of tooth bar 2 is transformed into the rotation of rack shaft 3, recirculating ball nut 6 is also connected by ball screw arrangement with screw rod 3, and because recirculating ball nut 6 is fixed in steering gear housing 1, thereby the rotation of rack shaft 3 change into move axially drive steering track rod 7 move change wheel steering angle.Meanwhile, the signal that sensor produces passes on electric machine controller, controller control assist motor stator 4 is switched on, drive rack shaft to rotate by rotor 5, the rotation of rack shaft is equally by being converted into reciprocal motion with the ball screw arrangement of recirculating ball nut 6, thus generation power steering reluctance torque.
As shown in Figure 3, in the time that rack shaft rotates, screw rod 3, along with rotation, passes to recirculating ball nut 6 by steel ball 10 by power, and because recirculating ball nut 6 is fixed on the housing 1 of deflector, antagonistic force moves rack shaft vertically.Meanwhile, under the frictional couple effect of 10 of screw rod 3, recirculating ball nut 6 and steel balls, all steel balls just roll in spiral duct shape passage, form the ball stream of circulation.
The utlity model has following advantage:
1, assist motor is integrated into deflector inside, structure is more simple and reliable, is easy to arrange; Tooth bar is provided with ball-screw nut at two ends, stressed also more balanced.
2, owing to having cancelled hollow rotor, deflector inner structure is more simplified, identical shell, tooth bar diameter can be larger, thus the motor of equal torque can do more elongated, convenient layout on car load.
3, owing to adopting solid rotor, internal rotor magnetic circuit distributes better, and the efficiency of motor can significantly be promoted.
4, motor form selection is more flexible, can adopt SMD or interior permanent magnet machines, also can adopt the switched reluctance machines that rotor structure is more firm.
5, preferably adopt switched reluctance machines, this system will not need extra power-transfer clutch, system is more safe and reliable, because switch reluctance machine rotor does not have permanent magnet, when motor is when (power-off or motor break down) quits work for a certain reason, rotor rotates can not cause that reluctance torque causes hard steering.
The above is preferred implementation of the present utility model; should be understood that; for those skilled in the art; do not departing under the prerequisite of principle described in the utility model; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (4)
1. a car rack booster type electric steering boost system, it is characterized in that, comprise housing and be fixed on the motor stator at this housing middle part, in described motor stator, be provided with rotor, described rotor two ends connect respectively a screw rod, wherein described in one, screw rod matches with the recirculating ball nut being fixed in described housing by ball screw arrangement, described in another, screw rod matches with the tooth bar of being located in described housing by ball screw arrangement, described tooth bar outside face engages with input shaft gear, two described screw rod outer ends are connected with steering track rod by ball end respectively, described input shaft gear drives described tooth bar to move radially along described housing.
2. car rack booster type electric steering boost system according to claim 1, is characterized in that, the hinged place of described steering track rod and screw rod is provided with oversheath.
3. car rack booster type electric steering boost system according to claim 1, is characterized in that, described rotor and screw rod are one-body molded.
4. car rack booster type electric steering boost system according to claim 1, is characterized in that, in order to drive the motor that described rotor rotates to adopt switch magnetic group motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320778646.3U CN203612044U (en) | 2013-12-02 | 2013-12-02 | Car rack assisted electric power steering system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320778646.3U CN203612044U (en) | 2013-12-02 | 2013-12-02 | Car rack assisted electric power steering system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203612044U true CN203612044U (en) | 2014-05-28 |
Family
ID=50764710
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320778646.3U Expired - Fee Related CN203612044U (en) | 2013-12-02 | 2013-12-02 | Car rack assisted electric power steering system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203612044U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104787110A (en) * | 2015-04-02 | 2015-07-22 | 常州机电职业技术学院 | Electric power steering gear |
| CN106672067A (en) * | 2016-09-18 | 2017-05-17 | 重庆乔麦科技有限公司 | Electronic steering device |
| CN106741131A (en) * | 2016-12-15 | 2017-05-31 | 常州机电职业技术学院 | Automobile steer-by-wire system |
| CN106864252A (en) * | 2017-04-17 | 2017-06-20 | 吉林大学 | One kind is turned to and drives integrated form wheel side power drive system and vehicle |
| CN107010105A (en) * | 2017-04-17 | 2017-08-04 | 吉林大学 | A kind of steering-by-wire and independent driving integrated form wheel side electric driver |
| CN108349523A (en) * | 2015-10-27 | 2018-07-31 | 克诺尔商用车制动***有限公司 | For the steering transmission linkage of vehicle, vehicle, the method for manipulating steering transmission linkage and the method for making Vehicular turn |
| CN109591881A (en) * | 2017-09-30 | 2019-04-09 | 比亚迪股份有限公司 | Rear-axle steering device, vehicle and its rear-wheel steering system |
| CN112061232A (en) * | 2020-09-29 | 2020-12-11 | 西安电子科技大学芜湖研究院 | Intelligent electric power-assisted steering system of commercial vehicle |
-
2013
- 2013-12-02 CN CN201320778646.3U patent/CN203612044U/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104787110A (en) * | 2015-04-02 | 2015-07-22 | 常州机电职业技术学院 | Electric power steering gear |
| CN108349523A (en) * | 2015-10-27 | 2018-07-31 | 克诺尔商用车制动***有限公司 | For the steering transmission linkage of vehicle, vehicle, the method for manipulating steering transmission linkage and the method for making Vehicular turn |
| US10647350B2 (en) | 2015-10-27 | 2020-05-12 | Knorr-Bremse Systeme Fuer Nutzfahrzeuge Gmbh | Steering gear for a vehicle, vehicle, method for controlling a steering gear and method for steering a vehicle |
| CN106672067A (en) * | 2016-09-18 | 2017-05-17 | 重庆乔麦科技有限公司 | Electronic steering device |
| CN106741131A (en) * | 2016-12-15 | 2017-05-31 | 常州机电职业技术学院 | Automobile steer-by-wire system |
| CN106864252A (en) * | 2017-04-17 | 2017-06-20 | 吉林大学 | One kind is turned to and drives integrated form wheel side power drive system and vehicle |
| CN107010105A (en) * | 2017-04-17 | 2017-08-04 | 吉林大学 | A kind of steering-by-wire and independent driving integrated form wheel side electric driver |
| CN106864252B (en) * | 2017-04-17 | 2023-10-31 | 吉林大学 | Steering and driving integrated wheel electric driving system and vehicle |
| CN107010105B (en) * | 2017-04-17 | 2023-12-15 | 吉林大学 | Wire-control steering and independent driving integrated wheel-side electric driving device |
| CN109591881A (en) * | 2017-09-30 | 2019-04-09 | 比亚迪股份有限公司 | Rear-axle steering device, vehicle and its rear-wheel steering system |
| CN109591881B (en) * | 2017-09-30 | 2021-03-26 | 比亚迪股份有限公司 | Rear wheel steering gear, vehicle and rear wheel steering system thereof |
| CN112061232A (en) * | 2020-09-29 | 2020-12-11 | 西安电子科技大学芜湖研究院 | Intelligent electric power-assisted steering system of commercial vehicle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140528 Termination date: 20211202 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |