KR20110133668A - Reducer of electronic power steering apparatus and electronic power steering apparatus having the same - Google Patents
Reducer of electronic power steering apparatus and electronic power steering apparatus having the same Download PDFInfo
- Publication number
- KR20110133668A KR20110133668A KR1020100053169A KR20100053169A KR20110133668A KR 20110133668 A KR20110133668 A KR 20110133668A KR 1020100053169 A KR1020100053169 A KR 1020100053169A KR 20100053169 A KR20100053169 A KR 20100053169A KR 20110133668 A KR20110133668 A KR 20110133668A
- Authority
- KR
- South Korea
- Prior art keywords
- shaft
- pivot
- worm
- worm shaft
- bearing case
- Prior art date
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Classifications
-
- 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
-
- 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
- B62D5/04—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear
- B62D5/0403—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear characterised by constructional features, e.g. common housing for motor and gear box
-
- 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
- F16H55/24—Special devices for taking up backlash
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2306/00—Other features of vehicle sub-units
- B60Y2306/09—Reducing noise
-
- 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
Abstract
Description
The present invention relates to a speed reducer of an electric power assisted steering device. More specifically, in the reducer of the electric power assisted steering device, it prevents the play caused by the wear of the worm and the worm wheel, prevents the occurrence of the rattle noise by the backlash, and minimizes the amount of play change caused by the change of the rotation torque. The present invention relates to a speed reducer of an electric power assist steering device capable of accurately assisting wheel operation force, and an electric power assist steering device including the same.
1 is a configuration diagram of a conventional electric power assisted steering device, as shown in FIG. 1, the electric power assisted
The
Accordingly, in the electric power assist steering device, torque generated by the rotation of the
That is, the torque generated by the rotation of the
2 is a cross-sectional view showing a reducer of a conventional electric power assisted steering device. As shown in FIG. 2, the
The
And the
The
The worm shaft bearing 257 has a ball 258 coupled between the
The reducer of the conventional electric power assisted steering device having such a structure has a problem in that premature wear of the gear and the operating force of the motor are increased by expansion due to moisture absorption of the worm wheel, and the worm and the worm wheel rotated by the driving of the motor are durable. While there was a problem that the rattle noise is generated due to the play and backlash caused by wear.
In addition, this has a problem in that it is not possible to accurately provide a steering assistance force to assist the steering wheel operation force of the driver.
The present invention has been made in the background, in the reduction gear of the electric power assist steering device, to prevent the play by the wear of the worm and the worm wheel and to prevent the generation of rattle noise by the backlash, the play by the change of the rotation torque The objective is to accurately assist the steering wheel maneuverability of the driver by minimizing the amount of change.
In order to achieve the above object, an embodiment of the present invention includes a clearance compensation device that supports the worm shaft in a worm wheel direction and is coupled to a gear housing so as to compensate for the clearance between the worm shaft and the worm wheel, wherein the clearance compensation device includes: A bearing case having a worm shaft bearing combined with a worm shaft and having a protruding support portion at the other side thereof, and having a pivot shaft at a position spaced apart from the central shaft of the worm shaft; and a pivot movement of the bearing case in combination with the pivot shaft. And a pivot support member having an accommodation groove for receiving the support portion, and an elastic member coupled between the accommodation groove and the support portion to support the bearing case. Provide the reducer of the device.
In addition, another embodiment of the present invention, in the electric steering apparatus including a steering shaft connected to the steering wheel, and a reducer connected to the steering shaft to assist the steering force, the reducer to compensate for the play between the worm shaft and the worm wheel And a clearance compensation device supporting the worm shaft in a worm wheel direction and coupled to a gear housing, wherein the clearance compensation device includes a worm shaft bearing in which the worm shaft is coupled to one side thereof, and a support part protruding from the other side of the worm shaft. A pivot support member having a bearing case provided with a pivot shaft at a position spaced apart from a central axis, and a receiving groove accommodating the pivot shaft to support the pivot movement of the bearing case; And an elastic member coupled between the receiving groove and the support part to support the bearing case. It provides an electric power assisted steering device.
According to the present invention, it is possible to prevent the play caused by the wear of the worm and the worm wheel, to prevent the generation of rattle noise due to the backlash, and to accurately assist the steering wheel operating force of the driver by minimizing the amount of play caused by the change of the rotation torque. It is effective to be.
In addition, according to the present invention there is an effect to prevent the early wear of the gear due to the increase and decrease of the clearance of the worm shaft and the worm wheel, and the impact noise generated in the worm shaft when driving the motor in the forward and reverse directions.
1 is a block diagram of a conventional electric power assisted steering device;
2 is a cross-sectional view showing a reducer of a conventional electric power assisted steering device;
3 and 4 are an exploded perspective view showing a play compensation device of the reducer of the electric power assisted steering apparatus according to an embodiment of the present invention,
5 to 9 is a schematic diagram showing an operating state of the play compensation device according to an embodiment of the present invention.
Hereinafter, some embodiments of the present invention will be described in detail through exemplary drawings. In adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are assigned to the same components as much as possible even though they are shown in different drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.
In addition, in describing the component of this invention, terms, such as 1st, 2nd, A, B, (a), (b), can be used. These terms are only for distinguishing the components from other components, and the nature, order or order of the components are not limited by the terms. If a component is described as being "connected", "coupled" or "connected" to another component, that component may be directly connected to or connected to that other component, but there may be another configuration between each component. It is to be understood that the elements may be "connected", "coupled" or "connected".
3 and 4 are exploded perspective views showing the clearance compensation device of the reducer of the electric power assisted steering apparatus according to an embodiment of the present invention, Figures 5 to 9 are views showing the operating state of the clearance compensation device according to an embodiment of the present invention. Schematic shown.
As shown in these drawings, the reducer of the electric power assisted steering apparatus according to the embodiment of the present invention, the
The
The reduction gear assists the driver's steering force by rotating the
On the other hand, in the opposite direction of the
The worm shaft bearing 257 is mounted between the
When the
The
In addition, the bearing
The
The
The receiving
In addition, one side of the circumferential direction of the receiving
The adjusting
In addition, a portion of the outer circumferential surface of the
The
When the
That is, FIGS. 5 and 7 show a state in which the
When the
On the contrary, when the moisture absorption amount of the
In addition, the
On the other hand, when the
Here, the angle "g" represents the angle of movement between the
Therefore, the
According to the present invention having such a shape and structure, in the reduction gear of the electric power assist steering device, it prevents the play caused by the wear of the worm and the worm wheel, and prevents the generation of rattle noise by the backlash, the amount of play change according to the change of the rotation torque By minimizing this, it is possible to accurately assist the driver's steering wheel operating force.
In addition, there is an effect of preventing the premature wear of the gear due to the increase and decrease of the clearance of the worm shaft and the worm wheel, and the impact noise generated in the worm shaft when driving the motor in the forward and reverse directions.
In the above description, all elements constituting the embodiments of the present invention are described as being combined or operating in combination, but the present invention is not necessarily limited to the embodiments. In other words, within the scope of the present invention, all of the components may be selectively operated in combination with one or more.
In addition, the terms "comprise", "comprise" or "having" described above mean that the corresponding component may be included, unless otherwise stated, and thus excludes other components. It should be construed that it may further include other components instead. All terms, including technical and scientific terms, have the same meanings as commonly understood by one of ordinary skill in the art unless otherwise defined. Terms commonly used, such as terms defined in a dictionary, should be interpreted to coincide with the contextual meaning of the related art, and shall not be construed in an ideal or excessively formal sense unless explicitly defined in the present invention.
The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.
254: worm shaft 257: worm shaft bearing
300: play compensation device 310: bearing case
313: support portion 315: pivot axis
320: elastic member 330: pivot support member
333: receiving groove 335: shaft coupling hole
420: adjusting hole 430: adjusting member
Claims (16)
The gap compensation device,
A bearing case having a worm shaft bearing in which the worm shaft is coupled to one side thereof and having a supporting part protruding from the other side thereof, the pivot case being provided at a position spaced apart from the central axis of the worm shaft;
A pivot support member coupled with the pivot shaft and having an accommodation groove for receiving the support to support pivot movement of the bearing case; And
An elastic member coupled between the accommodation groove and the support to support the bearing case;
Reducer of the electric power assisted steering device, characterized in that it comprises a.
Reduction groove of the electric power assist steering device characterized in that the receiving groove of the pivot support member is formed in an arc shape around the pivot axis.
The pivot support member is provided with an adjustment hole penetrating the outer circumferential surface on one side of the circumferential direction of the receiving groove, and the adjustment hole for adjusting the compression amount of the elastic member is coupled to the electric power assist steering. Reducer of the device.
The control member is a reducer of the electric power assist steering device, characterized in that screwed to the adjustment hole.
And the pivot support member communicates with the adjustment hole and has a flat portion corresponding to the fastening direction of the adjustment member.
The adjusting member is a reducer of the electric power assist steering device characterized in that the small diameter portion is inserted into the adjustment hole and the large diameter portion is supported and fixed to the flat portion.
The pivot shaft is a reducer of the electric power assisted steering apparatus, characterized in that formed integrally with the bearing case.
The bearing case has a shaft hole is formed in a position spaced apart from the central axis of the worm shaft, the reduction shaft of the electric power assisted steering apparatus, characterized in that the pivot shaft is press-fitted to the shaft hole.
The reducer is provided with a clearance compensation device for supporting the worm shaft in the worm wheel direction and coupled to the gear housing to compensate for the gap between the worm shaft and the worm wheel,
The gap compensation device,
A bearing case having a worm shaft bearing in which the worm shaft is coupled to one side thereof and having a supporting part protruding from the other side thereof, the pivot case being provided at a position spaced apart from the central axis of the worm shaft;
A pivot support member coupled with the pivot shaft and having an accommodation groove for receiving the support to support pivot movement of the bearing case; And
An elastic member coupled between the accommodation groove and the support to support the bearing case;
Electric power assisted steering, characterized in that it comprises a.
Receiving groove of the pivot support member is an electric power assisted steering device, characterized in that formed in an arc shape around the pivot axis.
The pivot support member is provided with an adjustment hole penetrating the outer circumferential surface on one circumferential side of the receiving groove, and the adjustment hole for adjusting the compression amount of the elastic member is coupled to the electric power assist steering. Device.
And the adjustment member is screwed to the adjustment hole.
And the pivot support member communicates with the adjustment hole and has a flat portion corresponding to the fastening direction of the adjustment member.
And the adjustment member includes a small diameter portion inserted into the adjustment hole and a large diameter portion supported and fixed to the flat portion.
And the pivot shaft is integrally formed with the bearing case.
The bearing case has a shaft hole is formed in a position spaced apart from the central axis of the worm shaft, the pivotal power assisted steering device, characterized in that the pivot shaft is press-fitted to the shaft hole.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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KR1020100053169A KR101124840B1 (en) | 2010-06-07 | 2010-06-07 | Reducer of Electronic Power Steering Apparatus and Electronic Power Steering Apparatus having The Same |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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KR1020100053169A KR101124840B1 (en) | 2010-06-07 | 2010-06-07 | Reducer of Electronic Power Steering Apparatus and Electronic Power Steering Apparatus having The Same |
Publications (2)
Publication Number | Publication Date |
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KR20110133668A true KR20110133668A (en) | 2011-12-14 |
KR101124840B1 KR101124840B1 (en) | 2012-03-26 |
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KR1020100053169A KR101124840B1 (en) | 2010-06-07 | 2010-06-07 | Reducer of Electronic Power Steering Apparatus and Electronic Power Steering Apparatus having The Same |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20150047300A (en) * | 2013-10-24 | 2015-05-04 | 현대모비스 주식회사 | Anti Rattle Device of Moter Driving Power Steering |
US20200189125A1 (en) * | 2017-06-29 | 2020-06-18 | Sony Interactive Entertainment Inc. | Robot joint structure |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101561952B1 (en) | 2014-05-23 | 2015-11-20 | 한국델파이주식회사 | Tilting mechanism for electric power steering apparatus and electric power steering apparatus including the same |
KR101561953B1 (en) | 2014-05-23 | 2015-11-20 | 한국델파이주식회사 | Tilting mechanism for electric power steering apparatus and electric power steering apparatus including the same |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005219708A (en) * | 2004-02-09 | 2005-08-18 | Nsk Ltd | Electric power steering device |
JP5309670B2 (en) * | 2008-04-16 | 2013-10-09 | 日本精工株式会社 | Electric power steering device |
KR20100032607A (en) * | 2008-09-18 | 2010-03-26 | 주식회사 만도 | Reducer of electronic power steering apparatus |
-
2010
- 2010-06-07 KR KR1020100053169A patent/KR101124840B1/en active IP Right Grant
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20150047300A (en) * | 2013-10-24 | 2015-05-04 | 현대모비스 주식회사 | Anti Rattle Device of Moter Driving Power Steering |
US20200189125A1 (en) * | 2017-06-29 | 2020-06-18 | Sony Interactive Entertainment Inc. | Robot joint structure |
US11787068B2 (en) * | 2017-06-29 | 2023-10-17 | Sony Interactive Entertainment Inc. | Robot joint structure |
Also Published As
Publication number | Publication date |
---|---|
KR101124840B1 (en) | 2012-03-26 |
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