CN204726501U - Electric boosting steering system - Google Patents
Electric boosting steering system Download PDFInfo
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- CN204726501U CN204726501U CN201520139963.XU CN201520139963U CN204726501U CN 204726501 U CN204726501 U CN 204726501U CN 201520139963 U CN201520139963 U CN 201520139963U CN 204726501 U CN204726501 U CN 204726501U
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- steering system
- housing
- electric boosting
- boosting steering
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Abstract
The utility model provides a kind of electric boosting steering system, it comprises speed reduction gearing, and speed reduction gearing is made up of worm and gear, and wherein worm screw two ends are supported by special elastic construction, make turbine and worm mechanism biased in advance, to compensate the back lash making middle wearing and tearing cause for a long time.Steering boost system structure of the present utility model is simple, is convenient to assembling, functional.
Description
Technical field
The utility model belongs to Automotive Steering Technology field, and specifically, the utility model relates to a kind of electric boosting steering system with innovation supporting construction.
Background technology
At present, electric boosting steering system (EPS-Electric Power Steering) substitutes traditional machinery or hydraulic steering power-assisted system gradually, becomes the direction of automobile steering system development.Pipe column type electric servo steering system (namely assist motor is integrated on steering column) is a kind of principal mode of electric booster system, and its cost is lower, is convenient to install, and has now been widely used on middle-size and small-size car.The steering power of pipe column type steering swivel system is provided by motor, and because the general rotating speed of motor is higher, moment of torsion is lower, therefore needs speed reduction gearing to increase output torque.At present, conventional speed reduction gearing is worm and gear speed-reduction apparatus.But, owing to manufacturing and inevitable error in assembling, gap is there is in worm and gear when engaging, and automobile is when jolting road traveling or turning to, can cause the sudden change of back lash owing to being subject to road excitation effect, various abnormal sound can be produced thus, and the change of the back lash of worm and gear also can affect the engagement of worm and gear, thus produce the sensation of hair fastener when causing driving, the traveling comfort that impact is driven.
Chinese invention patent notification number CN102765418A discloses a kind of automatic adjustment mechanism for gap of worm, wherein one end of worm screw adopts self-aligning ball bearing, the other end adopts the spring installation be located in the counterbore of housing to support, thus compensate the back lash of worm and gear, but this supporting construction is comparatively complicated and need offer multiple perforate on housing.
Chinese invention patent notification number CN103818471A discloses the anti-abnormal sound supporting construction of a kind of worm screw, wherein worm screw two ends are combined with bearing by O type ring, thus the collision noise avoiding gap to bring, but, due to its constructional feature, the action radius of worm screw is limited, cannot compensate the back lash increase because long term wear causes.
Utility model content
The purpose of this utility model is to provide a kind of electric boosting steering system, and its speed reduction gearing has the worm screw supporting way of original creation, and its structure is simple, and can the durable back lash produced of wearing and tearing of auto-compensation.
According to the one side of utility model, provide a kind of electric boosting steering system, it comprises speed reduction gearing, described speed reduction gearing comprises housing, to be contained in described housing and the worm and worm wheel be engaged with each other, described worm screw comprises first end and the second end, the first end of described worm screw is engaged in auxiliary bearing, described auxiliary bearing is plugged in bearing lining then, described bearing lining is fixed in the hole in described housing, described bearing lining comprises the inner ring engaged with described auxiliary bearing, the outer ring engaged with the hole in described housing and elasticity dowel, described elasticity dowel connects described inner ring and outer ring, make described inner ring can do radial motion in relatively described outer ring, second end of described worm screw is engaged in main bearing, described main bearing is plugged in bearing support then, described bearing support comprises the main body that engages with described main bearing and the strut member for being fixed to housing, described main body is connected by upper and lower elasticity dowel with described strut member, described strut member is fixed on housing.
Alternatively, the first end of described worm screw and described auxiliary bearing interference fit, and second end of described worm screw and described main bearing interference fit.
Alternatively, described auxiliary bearing and described main bearing are deep groove ball bearing.
Alternatively, described worm screw, described auxiliary bearing, described main bearing and described bearing support are fixed as one.
Alternatively, there is gap in the joint of the inner ring of described auxiliary bearing and described bearing lining.
Alternatively, there is gap between described rack body and described housing.
Alternatively, described strut member has the locating piece corresponding with the knock hole in described housing.
Alternatively, described bearing lining also has locating piece.
Alternatively, packing ring is provided with in described rack body.
Alternatively, described strut member is fixed on housing by jam nut.
Simple according to electric boosting steering system structure of the present utility model, easy to assembly, and in this steering swivel system, worm screw is fixedly connected with between main bearing and auxiliary bearing, avoid them and mutually collide produced noise, and three is integrally resiliently biased in advance, with durable wearing and tearing, fexible bias pressure will compensate due to the back lash that produces of wearing and tearing, thus avoid the sensation turning to noise and hair fastener that caused by back lash.
Accompanying drawing explanation
With reference to accompanying drawing, disclosure of the present utility model will be easier to understand.Those skilled in the art it is easily understood that: these accompanying drawings only for illustration of object, and and be not intended to be construed as limiting protection domain of the present utility model.In addition, numeral similar in figure in order to parts like representation class, wherein:
Fig. 1 is the section drawing of the speed reduction gearing according to electric boosting steering system of the present utility model;
Fig. 2 a and Fig. 2 b is respectively section drawing according to bearing lining of the present utility model and front elevation;
Fig. 3 a and Fig. 3 b is respectively section drawing according to bearing support of the present utility model and front elevation.
detailed description of the invention:
Easy understand, according to the technical solution of the utility model, is not changing under the utility model connotation, and one of ordinary skill in the art can propose the various structures mode that can mutually replace and implementation.Therefore, following detailed description of the invention and accompanying drawing are only the exemplary illustrations to the technical solution of the utility model, and should not be considered as of the present utility model all or the restriction be considered as technical solutions of the utility model or restriction.
The orientation terms such as the up, down, left, right, before and after mentioned in this manual or may mention, front, the back side, top, bottom carry out defining relative to the structure shown in each accompanying drawing, they are relative concepts, therefore likely can residing for it diverse location, different using state and correspondingly changing.So, also these or other orientation term should be interpreted as restricted term.
With reference to figure 1, it illustrates the speed reduction gearing according to electric boosting steering system of the present utility model, described speed reduction gearing comprises housing 1, to be contained in described housing 1 and the worm screw 3 be engaged with each other and worm gear 2, in the drawings, described worm screw 3 basic horizontal, it comprises the first end in left side and second end on right side in figure, the first end of described worm screw 3 is engaged in auxiliary bearing 4, described auxiliary bearing 4 is plugged in bearing lining 5 then, described bearing lining 5 is fixed in the hole in described housing 1 (being such as fixed with pressure), described bearing lining 5 comprises the inner ring 5a (see Fig. 2 b) engaged with described auxiliary bearing 4, the outer ring 5b engaged with the hole in described housing 1 and elasticity dowel 5c, described elasticity dowel 5c connects described inner ring 5a and outer ring 5b, make described inner ring 5a can do radial motion by relatively described outer ring 5b, second end of described worm screw 3 is engaged in main bearing 6, described main bearing 6 is plugged in bearing support 7 then, described bearing support 7 comprises the main body 7a engaged with described bearing 6, for the strut member 7b that is fixed to the housing 1 and packing ring 7c be arranged in main body 7a, described main body 7a is connected (see Fig. 3 b) by upper and lower elasticity dowel with described strut member 7b, described strut member 7b is fixed on housing 1 by jam nut 8.
According to an embodiment of the present utility model, the first end of described worm screw 3 and described auxiliary bearing 4 interference fit, and second end of described worm screw 3 and described main bearing 6 interference fit, three is integrally fixed relatively, can avoids like this between them, mutually colliding the noise produced.
According to an embodiment of the present utility model, described auxiliary bearing 4 is deep groove ball bearing with described main bearing 6.
According to an embodiment of the present utility model, described bearing lining 5 is press-fitted within the case 1, and described worm screw 3, described auxiliary bearing 4, described main bearing 6 and described bearing support 7 are fixed as one, and plug in bearing lining 5 together, and assembling is convenient in such design.
As shown in fig. 1, worm screw 3 after assembling is (with described auxiliary bearing 4, described main bearing 6 and described bearing support 7 are together) axis A' and horizontal axis A angled slightly, this is that the support provided due to bearing lining 5 and bearing support 7 caused, the rack body 7a of connection bearing support and two elasticity dowel deform somewhat up and down of strut member 7b, and the inner ring 5a of bearing lining 5 moves radially relative to lining outer ring 5b and allow for such elastic biasing.This is spring biased in the gap after worm and gear long term wear between auto-compensation worm and gear, thus prevents and turn to noise and hair fastener.
In one embodiment, there is gap with the joint of the inner ring 5a of described bearing lining 5 in described auxiliary bearing 4, makes more easily to assemble.
In one embodiment, between described rack body 7a and described housing 1, there is gap, allow above-described worm screw integral biased thus.
In one embodiment, described strut member 7b has the locating piece corresponding with the knock hole in described housing 1, and/or described bearing lining 5 also has locating piece 5d.Bearing lining 5 and bearing support 7 can circumference be located exactly.
In one embodiment, described bearing lining 5 is made up of elastomeric material, such as non-metallic material, plastics etc.
With reference now to Fig. 2 a and Fig. 2 b, it clearly show that the structure of bearing lining 5.Bearing lining 5 is generally elastic parts, be made up of non-metallic material, such as manufacture one by injection moulding, bearing lining 5 comprises the inner ring 5a for engaging with described auxiliary bearing 4, for the outer ring 5b that engages with the hole in described housing 1 and elasticity dowel 5c, described elasticity dowel 5c connects described inner ring 5a and outer ring 5b, makes described inner ring 5a can do radial motion within the specific limits by relatively described outer ring 5b.Bearing lining 5 also comprises locating piece 5d so that circumference is located exactly.
With reference now to Fig. 3 a and Fig. 3 b, it clearly show that the structure of bearing support 7, described bearing support 7 comprises the main body 7a that engages with described bearing 6 (as shown in the figure, preferably wrap bearing 6), bearing 6 and packing ring 7c are rolled into one for the strut member 7b that is fixed to housing 1 and the packing ring 7c be arranged in main body 7a, described main body 7a.Described main body 7a is connected by upper and lower two elasticity dowels with described strut member 7b, and described strut member 7b is fixed on housing 1 by jam nut 8 then.The strut member 7b of shown bearing support 7 also comprises locating piece 7d, and it mates with the corresponding aperture on housing 1, so that circumference is located exactly.
Speed reduction gearing according to electric turning booster system of the present utility model can assemble as follows, by worm screw 3, auxiliary bearing 4, main bearing 5 and bearing support 7 are pre-installed integral, four equal gapless couplings, prevent them from mutually colliding the noise of generation, then overall insertion is press-fitted in the inner ring 5a of the bearing lining 5 of housing 1 in advance, and auxiliary bearing 4 and inner ring 5a have certain interval to install.Due to the effect of elasticity dowel 5c, certain radial motion can be done relative to lining outer ring 5b, thus absorbing vibration, thus avoid the sound clashing into housing 1 when auxiliary bearing 4 and worm screw 3 mass motion.Subsequently, strut member 7b is fixed on housing 1 by nut 8.After worm and gear pretension, above-described entirety tilts relative to the long-living certain angle of the line of centers of the worm screw installation cavity of housing 1, make the generation of the dowel up and down elastic deformation of elastic supporting member for supporting optical member 7b, under the counteraction of this elastic deformation, worm and gear remains laminating, the back lash that auto-compensation may produce due to wearing and tearing.This structure can arrange the initial angle of inclination of worm screw according to actual needs, the sensation turning to noise and hair fastener avoiding back lash to cause, and improves driver comfort.
All parts, only in order to more clearly describe principle of the present utility model, wherein being specialized and principle of the present utility model is easier to understand by specific embodiment described above.When not departing from scope of the present utility model, those skilled in the art easily can carry out various amendment to the utility model.Therefore should be understood that, scope of the present utility model should not limited by above specific embodiment.
Claims (10)
1. an electric boosting steering system, it comprises speed reduction gearing, it is characterized in that, described speed reduction gearing comprises housing (1), to be contained in described housing (1) and the worm screw be engaged with each other (3) and worm gear (2), described worm screw (3) comprises first end and the second end, the first end of described worm screw (3) is engaged in auxiliary bearing (4), described auxiliary bearing (4) is plugged in bearing lining (5) then, described bearing lining (5) is fixed in the hole in described housing (1), described bearing lining (5) comprises the inner ring (5a) engaged with described auxiliary bearing (4), the outer ring (5b) engaged with the hole in described housing (1) and elasticity dowel (5c), described elasticity dowel (5c) connects described inner ring (5a) and outer ring (5b), make described inner ring (5a) relatively described outer ring (5b) radial motion can be done, second end of described worm screw (3) is engaged in main bearing (6), described main bearing (6) is plugged in bearing support (7) then, described bearing support (7) comprises the main body (7a) that engages with described main bearing (6) and the strut member (7b) for being fixed to housing (1), described main body (7a) is connected by upper and lower elasticity dowel with described strut member (7b), described strut member (7b) is fixed on described housing (1).
2. electric boosting steering system according to claim 1, it is characterized in that, the first end of described worm screw (3) and described auxiliary bearing (4) interference fit, and second end of described worm screw (3) and described main bearing (6) interference fit.
3. electric boosting steering system according to claim 1, is characterized in that, described auxiliary bearing (4) and described main bearing (6) are deep groove ball bearing.
4. electric boosting steering system according to claim 1, is characterized in that, described worm screw (3), described auxiliary bearing (4), and described main bearing (6) and described bearing support (7) are fixed as one.
5. electric boosting steering system according to claim 4, is characterized in that, described auxiliary bearing (4) exists gap with the joint of the inner ring (5a) of described bearing lining (5).
6. electric boosting steering system according to claim 5, is characterized in that, there is gap between described rack body (7a) and described housing (1).
7. electric boosting steering system according to claim 1, is characterized in that, described strut member (7b) has the locating piece corresponding with the knock hole in described housing (1).
8. electric boosting steering system according to claim 1, is characterized in that, described bearing lining (5) also has locating piece (5d).
9. electric boosting steering system according to claim 1, is characterized in that, is provided with packing ring (7c) in described rack body (7a).
10. electric boosting steering system according to claim 1, is characterized in that, described strut member (7b) is fixed on housing (1) by jam nut (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520139963.XU CN204726501U (en) | 2015-03-12 | 2015-03-12 | Electric boosting steering system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520139963.XU CN204726501U (en) | 2015-03-12 | 2015-03-12 | Electric boosting steering system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204726501U true CN204726501U (en) | 2015-10-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520139963.XU Active CN204726501U (en) | 2015-03-12 | 2015-03-12 | Electric boosting steering system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107985394A (en) * | 2017-12-08 | 2018-05-04 | 芜湖世特瑞转向系统有限公司 | Suitable for the rocker compensating gear of the reducing gear of electric boosting steering system |
| CN108000175A (en) * | 2017-12-24 | 2018-05-08 | 芜湖洪金机床有限公司 | A kind of adjustable numerical control rotating platform of gap of worm |
| CN111263720A (en) * | 2017-10-23 | 2020-06-09 | 蒂森克虏伯普利斯坦股份公司 | Steering column for a motor vehicle |
| CN112373556A (en) * | 2020-11-29 | 2021-02-19 | 上海龙创汽车设计股份有限公司 | Steering system of unmanned four-wheel independent steering chassis platform of low-speed vehicle |
| CN113586667A (en) * | 2021-07-30 | 2021-11-02 | 中汽创智科技有限公司 | Worm gear mechanism and electric power steering system |
-
2015
- 2015-03-12 CN CN201520139963.XU patent/CN204726501U/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111263720A (en) * | 2017-10-23 | 2020-06-09 | 蒂森克虏伯普利斯坦股份公司 | Steering column for a motor vehicle |
| CN111263720B (en) * | 2017-10-23 | 2022-07-12 | 蒂森克虏伯普利斯坦股份公司 | Steering column for a motor vehicle |
| US11655889B2 (en) | 2017-10-23 | 2023-05-23 | Thyssenkrupp Presta Ag | Steering column for a motor vehicle |
| CN107985394A (en) * | 2017-12-08 | 2018-05-04 | 芜湖世特瑞转向系统有限公司 | Suitable for the rocker compensating gear of the reducing gear of electric boosting steering system |
| CN108000175A (en) * | 2017-12-24 | 2018-05-08 | 芜湖洪金机床有限公司 | A kind of adjustable numerical control rotating platform of gap of worm |
| CN112373556A (en) * | 2020-11-29 | 2021-02-19 | 上海龙创汽车设计股份有限公司 | Steering system of unmanned four-wheel independent steering chassis platform of low-speed vehicle |
| CN113586667A (en) * | 2021-07-30 | 2021-11-02 | 中汽创智科技有限公司 | Worm gear mechanism and electric power steering system |
| CN113586667B (en) * | 2021-07-30 | 2023-05-26 | 中汽创智科技有限公司 | Worm gear mechanism and electric power steering system |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |