CN202657093U - Novel gapless meshing mechanism for worm gear and worm of automotive electric power steering gear - Google Patents
Novel gapless meshing mechanism for worm gear and worm of automotive electric power steering gear Download PDFInfo
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- CN202657093U CN202657093U CN 201220170474 CN201220170474U CN202657093U CN 202657093 U CN202657093 U CN 202657093U CN 201220170474 CN201220170474 CN 201220170474 CN 201220170474 U CN201220170474 U CN 201220170474U CN 202657093 U CN202657093 U CN 202657093U
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Abstract
The utility model discloses a novel gapless meshing mechanism for a worm gear and a worm of an automotive electric power steering gear. The novel gapless meshing mechanism comprises a shell, the worm gear, the worm and a motor shaft. Two cavity structures are formed in the shell, and the worm gear and the worm are arranged in the cavity structures. A large bearing and a small bearing are arranged at the two ends of the worm respectively, so that one end of the worm can be fixed, and the other end of the worm can slightly swing in a plane perpendicular to the axis of the worm gear through the axle center of the worm. In addition, a worm convex claw and a motor convex claw are also arranged, and a bumper is arranged between the worm convex claw and the motor convex claw. The novel gapless meshing mechanism is novel in structure and easy to assemble; a meshing gap between the worm gear and the worm can be eliminated, and the machining accuracy and abrasion resistance of the worm gear and the worm also can be properly reduced; and in addition, when an automobile is driven on an unsmooth road surface, the controllability of a driver and the comfort of the driver and passengers can be effectively improved.
Description
Technical field
The utility model relates to the automobile booster steering gear field, is specifically related to a kind of new automobile electric booster steering device worm and gear tight mesh mechanism of vehicle electric power-assisted steering device.
Background technology
At present, the worm and gear in traditional vehicle electric power-assisted steering device is to adopt gapped engaging structure, and worm gear and worm screw all are to be fixedly mounted in the housing by bearing, and the width between centers of worm and gear is constant.The gap that worm and gear meshes is too small, has various deviations simultaneously in Gear Processing, causes the driving torque of deflector excessive, the traveling comfort when affecting like this chaufeur driving occurs easily rotating the irregularity phenomenon; If the excessive clearance of worm and gear engagement or automobile are after using certain hour, worm and gear is because of the wearing and tearing excessive clearance that becomes, automobile is when irregular road traveling, worm gear and worm screw are conducted the impulsive force of coming and mutually clash into through tire, steering box, lower drive shaft owing to being subject to the road surface, produce abnormal sound, thereby affect driver and conductor's traveling comfort.How can effectively address the above problem becomes the technical barrier that present domestic EPS industry must be captured.
The utility model content
The technical matters that the utility model solves is to provide a kind of new automobile electric booster steering device worm and gear tight mesh mechanism, to solve the shortcoming in the above-mentioned background technology.
The technical matters that the utility model solves realizes by the following technical solutions:
New automobile electric booster steering device worm and gear tight mesh mechanism, comprise housing, worm gear, worm screw and motor shaft, wherein, comprise two cavity configurations of epicoele and cavity of resorption in the housing, be interconnected between two chambeies, worm gear is installed in the cavity of resorption of housing, worm screw is installed in the epicoele of housing, all the time be in the tight mesh state between the worm and gear, described worm screw two ends are respectively arranged with a large bearing and a little bearing, two coaxial bearing are installed, so that worm screw can be fixed by an end, the other end can slightly swing in perpendicular to the plane of worm gear axis by the worm screw axle center.Simultaneously, be provided with a worm screw dog and a motor dog, the worm screw dog is pressed on the worm screw by interference fit, and the motor dog is pressed on the motor shaft by interference fit, between worm screw dog and motor dog cushion rubber is housed.
In addition, described little bearing end arranged outside has a rubber gasket, rubber gasket is by a gland compacting, one side can drive little bearing by the elastic force of himself and worm screw is close to worm gear, also can make on the other hand the rubber gasket of pressing produce diametral load, so that the resilient bushing of installing between rubber gasket and the little bearing packs tightly little bearing.
In the utility model, two bearings of described worm screw fixed end can be deep groove ball bearings, also can be self-aligning ball bearings.
In the utility model, the elastic force of described resilient bushing is adjustable, by the elastic force of adjustable elastic lining, can ensure that the driving torque of deflector just can not surpass specified value, and because worm screw can swing, therefore, can not occur stuck or rotation irregularity phenomenon.
In the utility model, the hole that little bearing is installed in the described housing is waist shaped hole.
In the utility model, the swing of described worm screw is to be driven by resilient bushing self elastic force that packs tightly on little bearing.
Beneficial effect: the utility model always is in the tight mesh state owing to worm and gear, eliminated the back lash between the worm and gear, can suitably reduce again working accuracy and the resistance to abrasion of worm and gear, even after the worm and gear wearing and tearing, worm screw still can be close to worm gear, thereby vehicle can not occur mutually clashing into and generation abnormal sound phenomenon when irregular road traveling.And the circular gap of the cushion rubber between worm screw dog and the motor dog when both having eliminated worm screw dog and motor dog and transmitting torsional moment, the endplay that is installed in worm screw two place's bearings and the end float misalignment of motor shaft have also been eliminated, thereby solved when automobile during at irregular road traveling, can not occur between the worm and gear because mutually clashing into the abnormal sound that produces, and the abnormal sound that produces of the abnormal sound that produces because of commutation of motor and motor shaft, worm screw end float misalignment, greatly improved the handling and driver and crew's of navigating mate comfort level.
Description of drawings
Fig. 1 is the structural representation of preferred embodiment of the present utility model.
The specific embodiment
For technological means, creation characteristic that the utility model is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.
Preferred embodiment referring to the new automobile electric booster steering device worm and gear tight mesh mechanism of Fig. 1, in the present embodiment, comprise worm gear 1, worm screw 2, little bearing 3, gland 4, rubber gasket 5, resilient bushing 6, housing 7, large bearing 8, jam nut 9, worm screw dog 10, cushion rubber 11, motor dog 12, motor shaft 13.
Worm gear 1 is installed in the cavity of resorption of housing 7, and worm screw 2 is installed in the epicoele of housing 7 by the little bearing 3 at its two ends, large bearing 8; The first resilient bushing 6 of in the waist shaped hole of housing 7, packing into, little bearing 3 and the rubber gasket 5 of in the hole on the waist shaped hole left side, packing into; Large bearing 8, worm screw dog 10 are pressed on the worm screw 2 by interference fit, worm screw 2 is packed in the housing 7 together with large bearing 8, worm screw dog 10 afterwards again; Tighten jam nut 9, again gland 4 is pressed in the housing 7 by interference fit; Pack at last cushion rubber 11 and motor.
When gland 4 is pressed into housing 7 rubber gasket 5 is flattened, the rubber gasket 5 that flattens produces diametral load, make resilient bushing 6 pack tightly little bearing 3, simultaneously, drive little bearing 3 and worm screw 2 is close to worm gear 1 by himself elastic force, worm gear 1, worm screw 2 always are in the tight mesh state, even after 2 wearing and tearing of worm gear 1 worm screw, worm screw 2 still can be close to worm gear 1, thereby guarantees vehicle when irregular road traveling, can not occur mutually clashing into and generation abnormal sound phenomenon.
Be designed in the suitable scope by the elastic force with resilient bushing 6, the driving torque of deflector can not surpass specified value, and because worm screw 2 can swing, can not occur stuck or rotation irregularity phenomenon, and can suitably reduce working accuracy and the resistance to abrasion of worm gear 1 worm screw 2.Simultaneously, owing between worm screw dog 10 and the motor dog 12 cushion rubber 11 is housed, circular gap when both having eliminated worm screw dog 10 and 12 assembling of motor dog by cushion rubber 11, eliminate again the endplay that is installed in worm screw 2 bearings at both ends and the end float misalignment of motor shaft 13, thereby solved the abnormal sound that abnormal sound that motor produces because of commutation and motor shaft 13, worm screw 2 end float misalignments produce.
More than show and described groundwork of the present utility model, principal character and advantage of the present utility model.The technical personnel of the industry should be understood; the utility model is not restricted to the described embodiments; that describes in above-described embodiment and the specification sheets just illustrates principle of the present utility model; under the prerequisite that does not break away from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (4)
1. new automobile electric booster steering device worm and gear tight mesh mechanism, comprise housing, worm gear, worm screw and motor shaft, it is characterized in that, comprise two cavity configurations of epicoele and cavity of resorption in the housing, be interconnected between two chambeies that worm gear is installed in the cavity of resorption of housing, worm screw is installed in the epicoele of housing, all the time be in the tight mesh state between the worm and gear, described worm screw two ends are respectively arranged with a large bearing and a little bearing, and two coaxial bearing are installed; In addition, also be provided with a worm screw dog and a motor dog, the worm screw dog is pressed on the worm screw by interference fit, and the motor dog is pressed on the motor shaft by interference fit, between worm screw dog and motor dog cushion rubber is housed.
2. new automobile electric booster steering device worm and gear tight mesh according to claim 1 mechanism, it is characterized in that described little bearing end arranged outside has a rubber gasket, rubber gasket is by a gland compacting, simultaneously, between rubber gasket and little bearing, resilient bushing is installed.
3. new automobile electric booster steering device worm and gear tight mesh according to claim 1 mechanism is characterized in that two bearings of described worm screw fixed end are deep groove ball bearing or self-aligning ball bearing.
4. new automobile electric booster steering device worm and gear tight mesh according to claim 1 mechanism is characterized in that, the hole that little bearing is installed in the described housing is waist shaped hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220170474 CN202657093U (en) | 2012-04-21 | 2012-04-21 | Novel gapless meshing mechanism for worm gear and worm of automotive electric power steering gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220170474 CN202657093U (en) | 2012-04-21 | 2012-04-21 | Novel gapless meshing mechanism for worm gear and worm of automotive electric power steering gear |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202657093U true CN202657093U (en) | 2013-01-09 |
Family
ID=47452017
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220170474 Expired - Lifetime CN202657093U (en) | 2012-04-21 | 2012-04-21 | Novel gapless meshing mechanism for worm gear and worm of automotive electric power steering gear |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202657093U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104176113A (en) * | 2013-05-28 | 2014-12-03 | 上海汽车集团股份有限公司 | Worm gear gap eliminating mechanism, electric power-assisted steering system and automobile |
| CN105324293A (en) * | 2013-06-21 | 2016-02-10 | 蒂森克虏伯普利斯坦股份公司 | Double-pinion steering mechanism having a hollow shaft motor |
| CN106468311A (en) * | 2015-08-21 | 2017-03-01 | 比亚迪股份有限公司 | Worm-and-wheel gear, power steering apparatus and automobile |
-
2012
- 2012-04-21 CN CN 201220170474 patent/CN202657093U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104176113A (en) * | 2013-05-28 | 2014-12-03 | 上海汽车集团股份有限公司 | Worm gear gap eliminating mechanism, electric power-assisted steering system and automobile |
| CN105324293A (en) * | 2013-06-21 | 2016-02-10 | 蒂森克虏伯普利斯坦股份公司 | Double-pinion steering mechanism having a hollow shaft motor |
| CN105324293B (en) * | 2013-06-21 | 2018-04-20 | 蒂森克虏伯普利斯坦股份公司 | Double pinion steering mechanism with hollow shaft motor |
| CN106468311A (en) * | 2015-08-21 | 2017-03-01 | 比亚迪股份有限公司 | Worm-and-wheel gear, power steering apparatus and automobile |
| CN106468311B (en) * | 2015-08-21 | 2019-06-04 | 比亚迪股份有限公司 | Worm gear mechanism, power steering apparatus and automobile |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130109 |
|
| CX01 | Expiry of patent term |