CN104176113A - Worm gear gap eliminating mechanism, electric power-assisted steering system and automobile - Google Patents
Worm gear gap eliminating mechanism, electric power-assisted steering system and automobile Download PDFInfo
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- CN104176113A CN104176113A CN201310203240.7A CN201310203240A CN104176113A CN 104176113 A CN104176113 A CN 104176113A CN 201310203240 A CN201310203240 A CN 201310203240A CN 104176113 A CN104176113 A CN 104176113A
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Abstract
The invention relates to a worm gear gap eliminating mechanism which comprises a shell, a worm wheel, a worm rod, a locking nut, a first check ring, a second check ring, an end cover, a first bearing and a second bearing, wherein the first bearing is fixed by the first check ring and the locking nut; a first elastic element generating a compressing force along the axial direction of the worm rod is arranged at the first bearing; the second bearing is fixed by the end cover and the second check ring; a second elastic element generating a compressing force along the axial and radial directions of the worm rod is arranged at the second bearing. The invention also relates to an electric power-assisted steering system with the worm gear gap eliminating mechanism and an automobile with the electric power steering system. The worm gear gap eliminating mechanism has the advantages that the radial meshing gap and meshing lateral gap of the worm wheel and the worm rod are simultaneously eliminated, the automobile steering noise is effectively reduced, and the control stability of the automobile is increased.
Description
Technical field
The invention belongs to automobile technical field, relate to a kind of gap of worm eliminating machine, be provided with the electric boosting steering system of this gap of worm eliminating machine, and the automobile that disposes this electric boosting steering system.
Background technology
At automotive field, electric boosting steering system is one of common servo steering system, and it is combined together to form by mechanical system and electro-motor, and existing mechanical system adopts worm-and-wheel gear mostly.Due to the impact of the factors such as Mismachining tolerance, assembly error and working environment, the back lash between worm and gear exists always, and this gap mainly comprises radially back lash (i.e. " diameter clearance ") and meshing backlass (i.e. " endplay ").Radially the existence of back lash can make the transmission performance variation of worm and gear, thereby reduces vehicle handling stability; The existence of meshing backlass can cause the problems such as time delay, abnormal sound that commutate.
Existing gap of worm eliminating machine is revealed in some patent documentations.For example number of patent application is 201120211558.6 to disclose a kind of like this device: device comprises motor and housing, comprises worm gear, worm screw and worm screw axial pressing device in housing; Worm screw axial pressing device is comprised of jam nut, left end and right-hand member backup bearing, damper element, bearing lining and spring; Jam nut acts on left end backup bearing and is threaded with housing, right-hand member backup bearing is fixedly mounted on housing by bearing holding element and spring, while adjusting jam nut to initial compression amount of spring, can eliminate worm and gear primary clearance, after the flank of tooth weares and teares, under spring-force driven dual, can automatically eliminate backlass.The patent documentations such as other existing gap of worm eliminating machine also can be consulted US Patent No. US20040182188, No. CN200710127192.2nd, Chinese invention patent application and Chinese utility model patent CN201220170474.7, No. CN200620051107.X.
Yet the disclosed gap of worm eliminating machine of the prior art of above-mentioned document can only be eliminated the endplay that meshes between worm gear and worm screw or diameter clearance and can not realize and eliminate this two kinds of gaps simultaneously.Therefore as physical construction the simplest, most economical, that the most easily install how obtains the effect that can eliminate endplay and diameter clearance simultaneously, be, the problem that this gap of worm eliminating machine need to solve.
Summary of the invention
In view of this, one of object of the present invention is to provide a kind of and can eliminates axially and the gap of worm eliminating machine of diameter clearance simultaneously, to overcome the defect of above-mentioned and other side of the prior art.
In addition, the present invention also aims to provide be provided with the electronic resistance steering swivel system of above-mentioned gap of worm eliminating machine and the automobile that disposes described electronic resistance steering swivel system, to meet better people's actual demand.
For achieving the above object, the present invention has adopted following technical scheme:
A kind of gap of worm eliminating machine, described gap of worm eliminating machine comprises housing, worm gear and worm screw, described worm screw and described worm gear are positioned at described housing and the two engagement, described worm screw has first end and the second end, the first end of described worm screw is connected with motor by coupling assembly, described gap of worm eliminating machine also comprises jam nut, the first back-up ring, the second back-up ring, end cap, clutch shaft bearing and the second bearing, wherein said the first back-up ring and described jam nut are fixed described clutch shaft bearing, at described clutch shaft bearing place, be provided with along the first elastic element of the axial generation thrust of described worm screw, described end cap and described the second back-up ring are fixed described the second bearing simultaneously, at described the second bearing place, be provided with the second elastic element that axially and radially produces thrust along described worm screw.
In above-mentioned gap of worm eliminating machine, preferably, described housing is provided with for the opening of described end cap, described the second back-up ring and described the second elastic element is installed at the second end place of described worm screw.
In above-mentioned gap of worm eliminating machine, preferably, at described the second bearing place, be provided with the bearing sheath of anti-wear use.
In above-mentioned gap of worm eliminating machine, preferably, on described end cap, be provided with for waterproof and dustproof sealing member.
In above-mentioned gap of worm eliminating machine, preferably, described the first elastic element is corrugated gasket.
In above-mentioned gap of worm eliminating machine, preferably, described the second elastic element is L-type spring leaf.
In above-mentioned gap of worm eliminating machine, preferably, described clutch shaft bearing and described the second bearing are deep groove ball bearing or tilting bearing.
An electric boosting steering system, described electric boosting steering system is provided with above-mentioned gap of worm eliminating machine.
An automobile, described configuration of automobiles has above-mentioned electric boosting steering system.
Beneficial effect of the present invention is: compared with prior art, gap of worm eliminating machine of the present invention, can eliminate radially back lash and meshing backlass between worm gear and worm screw simultaneously, it has the features such as simple in structure, flexible arrangement, assembly technology requirement be low, not only can effectively reduce motor turning noise and can further promote the stability of automobile operation.
Accompanying drawing explanation
Below with reference to drawings and Examples, technical scheme of the present invention is described in further detail.Wherein:
Fig. 1 is the structural representation of an embodiment of gap of worm eliminating machine of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing, specific embodiments of the invention are elaborated.Should be understood that, the detailed description of specific embodiment is used for to description and interpretation the present invention, but is not limited to the present invention.
As shown in Figure 1, it schematically illustrates the structure of an embodiment of gap of worm eliminating machine of the present invention on the whole.This gap of worm eliminating machine comprises housing 1, worm gear 2, worm screw 3, the first elastic element 7, clutch shaft bearing 8, the first back-up ring 9, jam nut 10, the second bearing 11, the second elastic element 12, end cap 13 and the second back-up ring 14.
From Fig. 1, can clearly see, worm gear 2 and worm screw 3 are positioned at housing 1, and the two keeps engagement.Worm screw 3 has first end and the second end, and the first end of worm screw 3 is connected with motor 6 by coupling assembly (coupling assembly comprises worm screw coupler 4 and motor output shaft coupler 5).
In this embodiment, clutch shaft bearing 8 is set in the first end place of worm screw 3, and the first back-up ring 9 and jam nut 10 are arranged in a side of clutch shaft bearing 8, and a side of clutch shaft bearing 8 is fixed, and the first elastic element 7 can be arranged on the opposite side place of clutch shaft bearing 8.Under the effect of clutch shaft bearing 8, there is elastic deformation in this first elastic element 7, therefore make the first elastic element 7 along the axial generation thrust of worm screw 3, by the first elastic element, lock the endplay that nut and the first back-up ring can be eliminated worm screw first end effectively.For the space of creating crimp to the first elastic element, those skilled in the art can consider near the first elastic element place, step or groove to be set on housing, or the first elastic element is set on worm screw can be against the projection of its distortion etc.
It is to be noted, the first elastic element can preferably adopt the versions such as corrugated gasket, because corrugated gasket is simple in structure, be easy to manufacture, not only elastic reset power can fit tightly automatically with the parts that coordinate well, and shock resistance is good, thereby make the difficult end float misalignment that produces of clutch shaft bearing being mated avoid physical construction easily to produce the problems such as abnormal sound, if therefore the first elastic element employing corrugated gasket is economical and practical scheme.Certainly, according to different actual conditions, those skilled in the art can also adopt the part of other form except corrugated gasket.
Simultaneously, the second bearing 11 is set in the second end place of worm screw 3, the second back-up ring 14 and end cap 13 are arranged in a side of the second bearing 11, and a side of the second bearing 11 is fixed, and the second elastic element 12 is arranged in the opposite side of the second bearing 11, the second elastic element can have base portion and outshot, base portion and end cap 13 are fixed together, outshot is fitted with the periphery of the second bearing 11, under the mating reaction of the parts such as housing 1 and end cap 13, there is elastic deformation, thereby make the second elastic element 12 along worm screw 3, axially and radially produce thrust respectively.As preferably, the second elastic element 12 can adopt the structures such as L-type spring leaf, easily understands, and L-type spring leaf is because its special structure can produce at least elastic force of both direction.By with the coordinating of above-mentioned the first elastic element, the axial pressing force that the second elastic element 12 produces not only can be eliminated worm and gear meshing backlass completely, and the radial compaction power producing can be eliminated radially back lash of worm and gear.
In conjunction with above-described embodiment in other embodiments, housing 1 is provided with opening at the second end place of worm screw 3, makes whole housing 1 be configured to cavity design, to further reduce the assembly difficulty of integrated model.In fitting process, the parts such as end cap 13, the second back-up ring 14 and the second elastic element 12 can be after 3 assemblings of worm gear 2 and worm screw finish, from the opening part of housing 1, be press-fit into desired locations, so not only reduced the status requirement of worm and gear assembling, and can unify to adjust to the back lash of causing because of processing, assembling.
What those skilled in the art will find apparent that is; consider that the second bearing is installed in and in housing, bear radial compaction power and axial pressing force and easily wearing and tearing simultaneously; so bearing sheath 15 is set alternatively at the second bearing 11 places, to protect better the second bearing 11.
As an example, can also be in end caps setting such as sealing members 16 such as O shape circles, thus prevent the foreign material such as dust, steam from invading the inside of gap of worm eliminating machines and have influence on the result of use of product.
Because gap of worm eliminating machine of the present invention has compact conformation, be easy to the many advantages such as installation, not only can eliminate worm and gear radially back lash and meshing backlass simultaneously, can also be to because of environment, the gap that the reasons such as wearing and tearing cause compensates, and can effectively reduce the gearing noise between worm and gear on the one hand, greatly extended the service life of the electric boosting steering system that is equiped with this gap of worm eliminating machine on the other hand, and then improve the stability of automobile operation, make navigating mate when motor turning, feel more steadily comfortable, therefore be very suitable for being applied.
The specific embodiment of more than enumerating has been illustrated in detail gap of worm eliminating machine of the present invention, has been provided with the electric boosting steering system of this gap of worm eliminating machine, and the automobile that disposes this electric boosting steering system, this example is only for explanation principle of the present invention and embodiment thereof, but not limitation of the present invention, without departing from the spirit and scope of the present invention, those of ordinary skill in the art can also make various distortion and improvement.For example, clutch shaft bearing and the second bearing can use deep groove ball bearing or tilting bearing etc.Therefore, all technical schemes that are equal to all should belong to category of the present invention and be limited by every claim of the present invention.
Claims (9)
1. a gap of worm eliminating machine, described gap of worm eliminating machine comprises housing, worm gear and worm screw, described worm screw and described worm gear are positioned at described housing and the two engagement, described worm screw has first end and the second end, the first end of described worm screw is connected with motor by coupling assembly, it is characterized in that, described gap of worm eliminating machine also comprises jam nut, the first back-up ring, the second back-up ring, end cap, clutch shaft bearing and the second bearing, wherein said the first back-up ring and described jam nut are fixed described clutch shaft bearing, at described clutch shaft bearing place, be provided with along the first elastic element of the axial generation thrust of described worm screw, described end cap and described the second back-up ring are fixed described the second bearing simultaneously, at described the second bearing place, be provided with the second elastic element that axially and radially produces thrust along described worm screw.
2. gap of worm eliminating machine according to claim 1, is characterized in that, described housing is provided with for the opening of described end cap, described the second back-up ring and described the second elastic element is installed at the second end place of described worm screw.
3. gap of worm eliminating machine according to claim 2, is characterized in that, is provided with the bearing sheath of anti-wear use at described the second bearing place.
4. according to the gap of worm eliminating machine described in any one in claim 1-3, it is characterized in that, on described end cap, be provided with for waterproof and dustproof sealing member.
5. according to the gap of worm eliminating machine described in any one in claim 1-3, it is characterized in that, described the first elastic element is corrugated gasket.
6. according to the gap of worm eliminating machine described in any one in claim 1-3, it is characterized in that, described the second elastic element is L-type spring leaf.
7. according to the gap of worm eliminating machine described in any one in claim 1-3, it is characterized in that, described clutch shaft bearing and described the second bearing are deep groove ball bearing or tilting bearing.
8. an electric boosting steering system, is characterized in that, described electric boosting steering system is provided with according to the gap of worm eliminating machine described in any one in claim 1-7.
9. an automobile, is characterized in that, the with good grounds electric boosting steering system claimed in claim 8 of described configuration of automobiles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310203240.7A CN104176113B (en) | 2013-05-28 | 2013-05-28 | Gap of worm eliminating machine, electric boosting steering system and automobile |
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| CN201310203240.7A CN104176113B (en) | 2013-05-28 | 2013-05-28 | Gap of worm eliminating machine, electric boosting steering system and automobile |
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| CN104176113A true CN104176113A (en) | 2014-12-03 |
| CN104176113B CN104176113B (en) | 2018-01-23 |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105422827A (en) * | 2015-12-24 | 2016-03-23 | 上海延锋江森座椅机械部件有限公司 | Axial gap adjusting structure for shaft type transmission part |
| CN106838129A (en) * | 2017-04-18 | 2017-06-13 | 上海同驭汽车科技有限公司 | With worm and gear, brake and steering that centre-to-centre spacing regulation and gap eliminate |
| CN107947444A (en) * | 2017-12-08 | 2018-04-20 | 芜湖世特瑞转向***有限公司 | The attachment device of EPS motor and reducing gear |
| DE102018114267A1 (en) * | 2018-06-14 | 2019-12-19 | Thyssenkrupp Ag | Electromechanical power steering with a helical gear and a gear housing |
| CN110985646A (en) * | 2019-12-31 | 2020-04-10 | 北京科旭威尔科技股份有限公司 | Worm wheel and worm clearance eliminating mechanism |
| CN111017004A (en) * | 2018-10-10 | 2020-04-17 | 现代自动车株式会社 | Noise reduction structure of electronic power steering device |
| CN112407024A (en) * | 2020-10-27 | 2021-02-26 | 宁波拓普集团股份有限公司 | Steering column worm axial clearance compensation method |
| CN113847416A (en) * | 2021-09-15 | 2021-12-28 | 浙江航驱汽车科技有限公司 | Automatic worm and gear clearance adjusting mechanism for automobile steering system |
| CN114310866A (en) * | 2022-03-10 | 2022-04-12 | 珞石（北京）科技有限公司 | Robot joint and method for adjusting gear backlash between joints |
| US12031624B2 (en) | 2018-06-14 | 2024-07-09 | Thyssenkrupp Presta Ag | Electromechanical power steering having a helical-gear transmission and a transmission housing |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106838129B (en) * | 2017-04-18 | 2023-09-08 | 上海同驭汽车科技有限公司 | Worm and gear with center distance adjustment and clearance elimination, brake and steering system |
| CN106838129A (en) * | 2017-04-18 | 2017-06-13 | 上海同驭汽车科技有限公司 | With worm and gear, brake and steering that centre-to-centre spacing regulation and gap eliminate |
| CN107947444A (en) * | 2017-12-08 | 2018-04-20 | 芜湖世特瑞转向***有限公司 | The attachment device of EPS motor and reducing gear |
| DE102018114267A1 (en) * | 2018-06-14 | 2019-12-19 | Thyssenkrupp Ag | Electromechanical power steering with a helical gear and a gear housing |
| US12031624B2 (en) | 2018-06-14 | 2024-07-09 | Thyssenkrupp Presta Ag | Electromechanical power steering having a helical-gear transmission and a transmission housing |
| CN112313434A (en) * | 2018-06-14 | 2021-02-02 | 蒂森克虏伯普利斯坦股份公司 | Electromechanical power steering device with helical gear transmission and transmission housing |
| CN111017004A (en) * | 2018-10-10 | 2020-04-17 | 现代自动车株式会社 | Noise reduction structure of electronic power steering device |
| CN111017004B (en) * | 2018-10-10 | 2022-12-02 | 现代自动车株式会社 | Noise reduction structure of electronic power steering device |
| CN110985646A (en) * | 2019-12-31 | 2020-04-10 | 北京科旭威尔科技股份有限公司 | Worm wheel and worm clearance eliminating mechanism |
| CN112407024A (en) * | 2020-10-27 | 2021-02-26 | 宁波拓普集团股份有限公司 | Steering column worm axial clearance compensation method |
| CN113847416A (en) * | 2021-09-15 | 2021-12-28 | 浙江航驱汽车科技有限公司 | Automatic worm and gear clearance adjusting mechanism for automobile steering system |
| CN114310866A (en) * | 2022-03-10 | 2022-04-12 | 珞石（北京）科技有限公司 | Robot joint and method for adjusting gear backlash between joints |
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