CN2774886Y - Electric booster steering gear driver - Google Patents
Electric booster steering gear driver Download PDFInfo
- Publication number
- CN2774886Y CN2774886Y CN 200420022795 CN200420022795U CN2774886Y CN 2774886 Y CN2774886 Y CN 2774886Y CN 200420022795 CN200420022795 CN 200420022795 CN 200420022795 U CN200420022795 U CN 200420022795U CN 2774886 Y CN2774886 Y CN 2774886Y
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- CN
- China
- Prior art keywords
- worm
- gear
- worm screw
- tooth thickness
- output shaft
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- Expired - Lifetime
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Abstract
The utility model relates to an electric booster steering drive device which is mainly provided with an input component and an output component, wherein a worm of the input component is connected with a servo motor; an output shaft of the output component is connected with a steering device. Compared with the gear-rack type drive device, the utility model has the advantages of compact structure, low noise and large drive ratio range.
Description
Technical field the utility model relates to a kind of driving device of vehicle electric power-assisted steering device.
The technical background hydraulic power steering gear leaks factors such as hidden danger because of complex structure, manufacturing cost height, existence, can not satisfy energy-efficient, the environmental protection requirement of modern automobile technology pursue, and will progressively have been substituted by electric booster steering device.The driving device that has been used at present vehicle electric power-assisted steering device is mainly the pinion and-rack driving device.Its principle of work is: the input of driven by servomotor gear, and wheel and rack engagement output, tooth bar is connected with deflector.When automobile need turn to, servomotor work, by the rack-and-gear engagement, the work of tooth bar assisted diversion device makes the quantitative change of deflector steering effort light, reaches the power-assisted purpose.In case servomotor or gear break down and can't normal operation in addition, because not self-locking of rack-and-gear, so tooth bar also can be with gear, at this moment, deflector still can be worked except that not by the power-assisted, therefore can not constitute danger to motor turning.But its weak point is: component part is many, complex structure and huger, and difficulty is adjusted in assembling, the noise height, vibration is big, the manufacturing cost height, gear range is little, and applicable situation is restricted.
The deficiency that the summary of the invention the purpose of this utility model is to avoid the pinion and-rack driving device to exist provides that a kind of to have manufacturing cost relatively low, compact conformation, noise is low, vibrate for a short time, gear range is big, assembles a kind of Electrical power-assisted steering gear easy to adjust.
The utility model can take following scheme to realize purpose:
The utility model comprises input block and output block, and input block has servomotor, worm screw and resilient sleeve; Output block has worm gear, output shaft and nut.Servomotor is connected with worm screw by coupler, the worm and wheel engagement, worm gear adopts interference fit or key to be connected with output shaft, and output shaft is connected with deflector, when automobile need turn to, the driven by servomotor worm screw, worm screw drives worm gear, worm gear drives output shaft, output shaft assisted diversion device, make the quantitative change of deflector steering effort light, reach the power-assisted effect.Worm gear is made up of core wheel and wheel rim, and worm gear, worm screw transverse tooth thickness do not wait, and tooth thickness of wormwheel is greater than the worm screw transverse tooth thickness.Worm screw is adopted bull, and large helix angle makes not self-locking of worm couple, and when servomotor broke down, output shaft was by the worm gear drives worm screw, and at this moment, deflector still can be worked except that not by the power-assisted, can not constitute dangerous to motor turning.
The utility model has following advantage with respect to existing pinion and-rack driving device:
1. worm gear is formed by engineering plastics and metallic combination, and wherein the worm rim with worm mesh adopts engineering plastics, noise and vibration when having reduced the worm and wormwheel engagement; Worm gear wheel core segment adopts metal, guarantees the intensity that it connects with output shaft.
2. worm screw is made of a steel, and worm rim is made with engineering plastics.Because the intensity of steel is higher than engineering plastics, in order to guarantee the life-span basically identical of worm and worm wheel, with worm screw transverse tooth thickness attenuate, gear tooth thickness is thickeied.
3. the worm screw profile of tooth can adopt Archimedes, involute, the straight exterior feature of normal direction, type cone envelope, circular arc etc., specifically can be according to using needs to determine.
4. adjust difficulty in order to overcome assembling, between worm screw and bearing, utilize resilient sleeve to eliminate the gap, make resilient sleeve distortion pretension during assembling, utilize the recovery of elasticity of resilient sleeve to eliminate the axial assembly clearance of worm screw, same in order to eliminate the axial assembly clearance of output shaft, adopt nut to adjust endplay at mouth, make assembling adjustment become very convenient.
Drawing instruction diagram 1 is the transmission structures view;
Fig. 2 is that the A-A of Fig. 1 is to topology view;
Fig. 3 is the worm couple mesh schematic representation;
1. servomotor; 2. coupler; 3. worm screw; 4. worm gear; 5. resilient sleeve; 6. bearing; 7. housing; 8. bearing; 9. end cap; 10. setting nut; 11. output shaft; 12. wheel rim; 13. core wheel.
The specific embodiment is described in further detail the content of the technical program in conjunction with the accompanying drawings.
Embodiment 1. is illustrated in figures 1 and 2, and servomotor 1 drives worm screw 3 by coupler 2, and worm screw 3 and worm gear 4 engagements drive output shaft 11 rotations; Servomotor 1, worm screw 3, resilient sleeve 5 is formed input block, by the distortion elimination worm screw 3 of resilient sleeve 5 and the gap between housing 7 and the bearing 6; Worm gear 4, output shaft 11, nut 10 is formed output block, by the gap between setting nut 10 elimination worm gears 4 and housing 7, end cap 9 and the bearing 8.Input block and output block are assemblied on housing 7 and the end cap 9 forms driving device.Worm gear 4 is made up of wheel rim 12 and core wheel 13, wheel rim 12 adopts engineering plastics, wheel rim 12 and worm screw 3 ingear noises are reduced, vibration reduces, core wheel 13 adopts metallic material, worm gear 4 adopts interference or key connecting with output shaft 11, guarantees linking intensity, and wheel rim 12 connects casting or the injection moulding mode of adopting with core wheel 13.
Embodiment 2. is shown in Figure 3, and worm screw 3 is made of a steel, and worm rim 12 usefulness engineering plastics are made.The intensity of steel is higher than the intensity of engineering plastics, in order to realize the basically identical in service life of worm and worm wheel, with the transverse tooth thickness attenuate of worm screw 3, makes its transverse tooth thickness be processed into 0.3M π～0.5M π.Transverse tooth thickness thickening with worm gear 4 makes its transverse tooth thickness be processed into 0.5M π～0.7M π.
Claims (3)
1, a kind of Electrical power-assisted steering gear includes input block and output block, and input block has servomotor, worm screw and resilient sleeve; Output block has worm gear, output shaft and nut, and servomotor connects worm screw by coupler, the worm and wheel engagement, worm gear connects with output shaft interference fit or key, it is characterized in that worm gear (4) is made up of core wheel (13) and wheel rim (12), and worm gear (4) transverse tooth thickness is greater than the transverse tooth thickness of worm screw (3).
2, Electrical power-assisted steering gear according to claim 1 is characterized in that worm gear (4) transverse tooth thickness at 0.5M π～0.7M π, and worm screw (3) transverse tooth thickness is at 0.3M π～0.5M π.
3, Electrical power-assisted steering gear according to claim 1 is characterized in that worm screw (3) is a bull, large helix angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420022795 CN2774886Y (en) | 2004-05-12 | 2004-05-12 | Electric booster steering gear driver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420022795 CN2774886Y (en) | 2004-05-12 | 2004-05-12 | Electric booster steering gear driver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2774886Y true CN2774886Y (en) | 2006-04-26 |
Family
ID=36749194
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420022795 Expired - Lifetime CN2774886Y (en) | 2004-05-12 | 2004-05-12 | Electric booster steering gear driver |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2774886Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104384620A (en) * | 2014-09-22 | 2015-03-04 | 东风汽车零部件(集团)有限公司 | Designing method of worm and worm gear for C-EPS (column-electric power steering) |
| CN108386490A (en) * | 2018-05-30 | 2018-08-10 | 浙江开拓汽车电器有限公司 | Helical teeth worm and gear self-locking device |
| CN109538698A (en) * | 2018-12-25 | 2019-03-29 | 德恩科电机（太仓）有限公司 | A kind of low noise worm reduction box |
| CN113954954A (en) * | 2021-11-19 | 2022-01-21 | 中汽创智科技有限公司 | Steering system |
-
2004
- 2004-05-12 CN CN 200420022795 patent/CN2774886Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104384620A (en) * | 2014-09-22 | 2015-03-04 | 东风汽车零部件(集团)有限公司 | Designing method of worm and worm gear for C-EPS (column-electric power steering) |
| CN108386490A (en) * | 2018-05-30 | 2018-08-10 | 浙江开拓汽车电器有限公司 | Helical teeth worm and gear self-locking device |
| CN109538698A (en) * | 2018-12-25 | 2019-03-29 | 德恩科电机（太仓）有限公司 | A kind of low noise worm reduction box |
| CN113954954A (en) * | 2021-11-19 | 2022-01-21 | 中汽创智科技有限公司 | Steering system |
| CN113954954B (en) * | 2021-11-19 | 2023-10-20 | 中汽创智科技有限公司 | Steering system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Hangzhou Zhongde Transmission Equipment Co., Ltd. Assignor: Hangzhou Speed Reducer Plant Contract fulfillment period: 2007.10.7 to 2012.10.6 Contract record no.: 2008330001150 Denomination of utility model: Electric booster steering gear driver Granted publication date: 20060426 License type: Exclusive license Record date: 20081017 |
|
| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2007.10.7 TO 2012.10.6; CHANGE OF CONTRACT Name of requester: HANGZHOU SINO-GERMAN TRANSMISSION EQUIPMENT CO., L Effective date: 20081017 |
|
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20140512 Granted publication date: 20060426 |