CN102874302B - Column assist device - Google Patents
Column assist device Download PDFInfo
- Publication number
- CN102874302B CN102874302B CN201210232447.2A CN201210232447A CN102874302B CN 102874302 B CN102874302 B CN 102874302B CN 201210232447 A CN201210232447 A CN 201210232447A CN 102874302 B CN102874302 B CN 102874302B
- Authority
- CN
- China
- Prior art keywords
- worm
- worm shaft
- shaft part
- assist device
- movable plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D3/00—Steering gears
- B62D3/02—Steering gears mechanical
- B62D3/04—Steering gears mechanical of worm type
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D5/00—Power-assisted or power-driven steering
- B62D5/06—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
- B62D5/20—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle specially adapted for particular type of steering gear or particular application
- B62D5/24—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle specially adapted for particular type of steering gear or particular application for worm type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H1/00—Toothed gearings for conveying rotary motion
- F16H1/02—Toothed gearings for conveying rotary motion without gears having orbital motion
- F16H1/04—Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members
- F16H1/12—Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members with non-parallel axes
- F16H1/16—Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members with non-parallel axes comprising worm and worm-wheel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
- F16H55/02—Toothed members; Worms
- F16H55/22—Toothed members; Worms for transmissions with crossing shafts, especially worms, worm-gears
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H57/021—Shaft support structures, e.g. partition walls, bearing eyes, casing walls or covers with bearings
- F16H2057/0213—Support of worm gear shafts
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Gear Transmission (AREA)
- Power Steering Mechanism (AREA)
Abstract
The present invention relates to column assist device, including: worm shaft part, possess gear on worm；Worm gear part, outer peripheral face is engaged in gear on worm and rotates；Housing department, wraps worm shaft part；And supporting part, it is installed on housing department, worm shaft part is supported.
Description
Technical field
The present invention relates to a kind of column assist device, particularly relate to absorb and worm gear is transmitted the impact in dynamic process and reduces the column assist device of noise.
Background technology
Generally speaking, column assist device, according to vehicle speed sensor and the service condition of the vehicle turning to the perception such as torque sensor, makes electronic-controlled installation drive motor, the steering force of auxiliary driver, thus provide and enable a driver to keep the steering behaviour of optimal steering feeling, when low cruise, it is provided that slim and graceful, comfortable steering state, when high-speed cruising, sedate steering state is provided, sudden in emergency circumstances, it is possible to this is tackled, it is achieved be rapidly converting to.
In column assist device, possess motor and be connected with motor and the worm shaft that rotates engages the worm gear rotated with worm shaft.Now, worm gear is installed on the steering spindle that the steering wheel revolving force to operator transmits.
Therefore, drive the revolving force of the worm shaft produced by means of motor, be additional to the steering wheel revolving force of operator, pass to steering spindle such that it is able to make the driving environment that turns to of driver keep soft, stable.
The background technology of the present invention is disclosed in Korean published Patent publication 2010-0009380 (2010.01.27 is open, denomination of invention: the gear engagement states holding means of electric power steering device for vehicles).
Summary of the invention
(solving the technical problem that)
For conventional column assist device, engaging the worm shaft rotated with worm gear and keep the state of engagement by means of spring, but there is problems of, if the load of spring is weak, then noise is serious, if the load of spring is strong, then the steering feeling of steering wheel declines.
Accordingly, it would be desirable to this is improved.
The present invention for improve as above problem and research and develop, its object is to provide a kind of column assist device, while using relatively little spring load, transmittance process absorb impact, reduce noise.
(solving the means of problem)
For reaching object indicated above, the present invention provides a kind of column assist device, it is characterised in that including: worm shaft part, possesses gear on worm；Worm gear part, outer peripheral face is engaged in described gear on worm and rotates；Housing department, wraps described worm shaft part；And supporting part, it is installed on described housing department, described worm shaft part is supported.
Inventive feature also resides in, and described supporting part includes: fixed plate, is installed on described housing department, is formed with inclined plane；Movable plate, the inclined plane contacting described fixed plate moves, and is supported described worm shaft part；Pressure plate, presses to described movable plate；Elastomer, flexibly supports described pressure plate；And supporter, support described elastomer.
Present invention is also characterized in that in the inclined plane of described fixed plate, be formed with fixing coating；On described movable plate, it is formed and the mobile coating of described fixing coating layer touch.
Present invention is also characterized in that on described movable plate, be formed with guiding groove；In described pressure plate, protrude and be formed with the guide hump inserting described guiding groove.
(effect of invention)
The supporting part of the column assist device of the present invention utilizes inclined plane principle, is supported worm shaft part, thus has the effect that with relatively Smaller load, can reduce knock between worm shaft part and worm gear part.
Accompanying drawing explanation
Fig. 1 is the accompanying drawing of the column assist device briefly showing one embodiment of the invention.
Fig. 2 is the exploded perspective view of the supporting part in the column assist device briefly showing one embodiment of the invention.
Fig. 3 is the accompanying drawing of the elastomeric intumescent state of the supporting part in the column assist device briefly showing one embodiment of the invention.
Fig. 4 is the accompanying drawing of the elastomer contracts state of the supporting part in the column assist device briefly showing one embodiment of the invention.
Fig. 5 is the accompanying drawing of state that worm shaft part is supported by the supporting part of the column assist device briefly showing one embodiment of the invention when danger road travels.
(label declaration)
10: worm shaft part 20: worm gear part
30: housing department 40: supporting part
41: fixed plate 42: movable plate
43: pressure plate 44: elastomer
45: supporter
Detailed description of the invention
With reference to the accompanying drawings, the embodiment of the column assist device of the present invention is described.In the process, the thickness of the lines shown in accompanying drawing or the size etc. of structural element, may show turgidly for the definition on illustrating and facility.It addition, term described later is as the term defined in view of function in the present invention, may be different because of user, the intention of operator or convention.Therefore, the definition for this term should content based on this specification be determined.
Fig. 1 is the accompanying drawing of the column assist device briefly showing one embodiment of the invention, Fig. 2 is the exploded perspective view of the supporting part in the column assist device briefly showing one embodiment of the invention, Fig. 3 is the accompanying drawing of the elastomeric intumescent state of the supporting part in the column assist device briefly showing one embodiment of the invention, Fig. 4 is the accompanying drawing of the elastomer contracts state of the supporting part in the column assist device briefly showing one embodiment of the invention, Fig. 5 is the accompanying drawing of state that worm shaft part is supported by the supporting part of the column assist device briefly showing one embodiment of the invention when danger road travels.
As shown in Figures 1 to 5, in the column assist device 1 of one embodiment of the invention, possess worm shaft part 10, worm gear part 20, housing department 30 and supporting part 40.
The outer peripheral face of worm shaft part 10 is formed gear on worm 11.The outer peripheral face of worm gear part 20 engages rotation with gear on worm 11.Liner part 30 engages rotation with the inner peripheral surface of worm gear part 20.
Worm shaft part 10 and worm gear part 20 are built in housing department 30, and motor part 50 is incorporated into housing department 30.The motor drive shaft possessed in this motor part 50 is connected with worm shaft part 10, makes worm shaft part 10 rotate.
Supporting part 40 is installed on housing department 30.This supporting part 40 is built in housing department 30, is supported worm shaft part 10, thus limits leaving between worm shaft part 10 and worm gear part 20.
In the supporting part 40 of one embodiment of the invention, possess fixed plate 41, movable plate 42, pressure plate 43, elastomer 44 and supporter 45.
Fixed plate 41 is installed on housing department 30.This fixed plate 41 is fixedly installed in the medial surface of housing department 30, leaves worm shaft part 10 and configures.Fixed plate 41 is formed with inclined plane to worm shaft part 10 direction.
Movable plate 42 contacts the inclined plane of fixed plate 41 and moves.This movable plate 42 has the shape corresponding with the inclined plane of fixed plate 41, contacts with worm shaft part 10, is supported worm shaft part 10.
Pressure plate 43 is connected with movable plate 42, presses movable plate 42, and supporter 45 is fixedly installed in housing department 30.
The one end of elastomer 44 supports pressure plate 43, and supporter 45 is supported by the other end.
Therefore, if because of the interference with worm gear part 20, worm shaft part 10 presses to movable plate 42, then movable plate 42 is along inclined plane, slides mobile in fixed plate 41, and elastomer 44 shrinks.
Now, fixed plate 41 and movable plate 42 utilize the principle on inclined-plane, constitute the structure that the load (F) making worm shaft part 10 press worm gear part 20 realizes minimizing such that it is able to find the load (W) movable plate 42 being supported for preventing knock (rattle) and make the friction between worm shaft part 10 and worm gear part 20 realize minimizing the optimum (with reference to Fig. 3) of desirable load (F).
That is, due to F/W=tan θ, so, F=W*tan θ.
For example it is assumed that the inclination angle of movable plate 42 is 30 degree, then, F=0.57W.
On the other hand, in the inclined plane of fixed plate 41, it is coated with fixing coating 41a, in the inclined plane of movable plate 42, is coated with mobile coating 42a.
In order to slide smoothly under fixed plate 41 contact condition at movable plate 42, as fixing coating 41a and mobile coating 42a, use the material that coefficient of friction is relatively low.
Movable plate 42 is formed guiding groove 46, protrudes above the guide hump 47 being formed with insertion guiding groove 46 in pressure plate 43.
Owing to guide hump 47 inserts the guiding groove 46 of movable plate 42, therefore, pressure plate 43 keeps the connection status with movable plate 42.It addition, the guide hump 47 of pressure plate 43 inserts along guiding groove 46, prevent rocking of pressure plate 43.
Pressure plate 43 is formed insertion groove 48.In this insertion groove 48, it is inserted with the one end of elastomer 44.And, on supporter 45, protrude and be formed with support protrusion 49.This support protrusion 49 inserts elastomer 44 the other end of coiled type, prevents rocking of elastomer 44.
Explanation below has the effect of the column assist device of one embodiment of the invention as constructed as above.
When worm gear part 20 is engaged in worm shaft part 10, movable plate 42 is carrying out while face contacts with fixed plate 41, being supported worm shaft part 10, the load of elastomer 44 passes to movable plate 42 by pressure plate 43, supports movable plate 42 (with reference to Fig. 3).
In the above-described state, if vibrated in worm shaft part 10 because of the interference with worm gear part 20, then movable plate 42 is pressed by worm shaft part 10.
Movable plate 42 as pressed by worm shaft part 10, then movable plate 42 by means of with contacting of inclined plane of fixed plate 41 and movement of sliding, elastomer 44 shrinks (with reference to Fig. 4).
While this contraction of elastomer 44 and expansion are repeated, the impact of worm shaft part 10 is absorbed, and keeps contact condition between worm shaft part 10 and worm gear part 20.
On the other hand, if it is excessive to cause inversely inputting power load because travelling on the road of danger, worm gear part 20 is vibrated, then 10 impact loads drastically of worm shaft part pass to movable plate 42 (with reference to Fig. 5).
Now, the load putting on movable plate 42 can not disperse to inclined plane, only transmits to the direction of vibration of worm shaft part 10, and the slip of movable plate 42 is moved and is restricted, it is thus possible to suppression worm shaft part 10 is travelling, prevent from occurring between worm shaft part 10 and worm gear part 20 knock abnormal sound.
The present invention is illustrated referring to the drawings the most shown embodiment, but this is example, and person of ordinary skill in the field it is to be understood that other embodiments that can be derived there various deformation and equalization.
Claims (3)
1. a column assist device, it is characterised in that including:
Worm shaft part, possesses gear on worm；
Worm gear part, outer peripheral face is engaged in described gear on worm and rotates；
Housing department, wraps described worm shaft part；And
Supporting part, is installed on described housing department, is supported described worm shaft part；
Described supporting part includes:
Fixed plate, is installed on described housing department, is formed with inclined plane；
Movable plate, the inclined plane contacting described fixed plate moves, and is supported described worm shaft part；
Pressure plate, presses to described movable plate；
Elastomer, flexibly supports described pressure plate；And
Supporter, supports described elastomer.
Column assist device the most according to claim 1, it is characterised in that:
In the inclined plane of described fixed plate, it is formed with fixing coating；
On described movable plate, it is formed and the mobile coating of described fixing coating layer touch.
Column assist device the most according to claim 2, it is characterised in that:
On described movable plate, it is formed with guiding groove；
In described pressure plate, protrude and be formed with the guide hump inserting described guiding groove.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2011-0069060 | 2011-07-12 | ||
| KR1020110069060A KR20130008357A (en) | 2011-07-12 | 2011-07-12 | Electric power steering device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102874302A CN102874302A (en) | 2013-01-16 |
| CN102874302B true CN102874302B (en) | 2016-08-03 |
Family
ID=47475887
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210232447.2A Active CN102874302B (en) | 2011-07-12 | 2012-07-05 | Column assist device |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR20130008357A (en) |
| CN (1) | CN102874302B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI803796B (en) * | 2020-03-27 | 2023-06-01 | 吳震洋 | vehicle steering |
-
2011
- 2011-07-12 KR KR1020110069060A patent/KR20130008357A/en not_active Application Discontinuation
-
2012
- 2012-07-05 CN CN201210232447.2A patent/CN102874302B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| KR20130008357A (en) | 2013-01-22 |
| CN102874302A (en) | 2013-01-16 |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |