WO2005022004A1 - 減速機 - Google Patents
減速機 Download PDFInfo
- Publication number
- WO2005022004A1 WO2005022004A1 PCT/JP2004/012348 JP2004012348W WO2005022004A1 WO 2005022004 A1 WO2005022004 A1 WO 2005022004A1 JP 2004012348 W JP2004012348 W JP 2004012348W WO 2005022004 A1 WO2005022004 A1 WO 2005022004A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- gear
- shaft
- housing
- gear shaft
- lubricant
- Prior art date
Links
Classifications
-
- 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
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0457—Splash lubrication
-
- 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
- B62D5/0409—Electric motor acting on the steering column
- B62D5/0412—Electric motor acting on the steering column the axes of motor and steering column being parallel
-
- 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
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/048—Type of gearings to be lubricated, cooled or heated
- F16H57/0493—Gearings with spur or bevel gears
-
- 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
- F16H1/06—Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members with parallel axes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T74/00—Machine element or mechanism
- Y10T74/19—Gearing
- Y10T74/19991—Lubrication
Definitions
- the present invention relates to a reduction gear that decelerates an auxiliary torque for assisting steering and transmits it to a steering shaft.
- a spur gear or a helical gear has a relatively high torque transmission efficiency of about 95%, so the output torque of the electric motor can be reduced accordingly. Therefore, it is possible to suppress the growth of the outer shape of the electric motor, and it is possible to make the entire electric power steering apparatus compact.
- a reduction gear composed of a pair of spur gears set at a high reduction ratio or a helical gear is housed in a housing, and
- a steering device is disclosed that can be made compact as a whole steering column in which an electric motor and a reduction gear are disposed by providing the motor in proximity to a housing.
- Patent Document 2 discloses a reduction gear in which a fat and oil lubricant is filled in a housing that accommodates a gear, in order to reduce vibrations and the like due to tooth hitting noise when a worm gear is used.
- Patent Document 1 Japanese Patent Application Laid-Open No. 11-124045
- Patent Document 2 Japanese Patent Application Laid-Open No. 2002-147575
- Patent Document 2 when it is intended to alleviate the vibration due to the rattling noise by filling a fat and oil lubricant having a high viscosity into the housing that accommodates the gear, the input rotation There is also a problem that the sense of viscosity becomes stronger with respect to torque, resulting in a decrease in steering feeling and a decrease in steering responsiveness.
- the present invention has been made in view of such circumstances, and it is an object of the present invention to provide a reduction gear that reduces vibrations due to rattling noise while allowing a certain degree of backlash of a pair of gears.
- the small gear shaft and the large gear shaft are flat.
- a reduction gear in which a small gear provided on the small gear shaft and a large gear provided on the large gear shaft are arranged in a row so as to mutually coincide, and the rotation of the small gear shaft is transmitted to the large gear shaft.
- the width of the small gear shaft and the large gear shaft in the direction perpendicular to the axial center direction between the small gear shaft and the large gear shaft between the end of the arc portion housing the gear is monotonously from the small gear side toward the large gear side. It is characterized by having an inner surface of increasing shape.
- the reduction gear according to the first aspect of the present invention includes a housing that accommodates a pair of small gears and a large gear, and the inner surface of the housing has a smooth shape such that the oil lubricant flows smoothly. Therefore, when the grease lubricant is injected into the housing, the grease lubricant can move smoothly even if the posture of the car changes, and the vibration due to the rattling noise accompanying the change of the posture of the car increases or decreases. It also becomes possible to reduce the unevenness of the steering feeling resulting.
- the reduction gear according to the second aspect of the invention is characterized in that the housing has a fat and oil lubricant in an amount for immersing a part of a joint portion between the small gear and the large gear.
- a reduction gear according to a second aspect of the present invention includes a housing including a pair of small gears and a large gear, and in the housing, a part of the joint portion between the small gear and the large gear is filled with a grease lubricant. Therefore, it is possible to reduce the vibration due to rattling noise caused by the road surface reaction force without stuffing the backlash, and it is possible to reduce the decrease in the steering feeling and the decrease in the steering response due to excessive filling of the grease lubricant. It becomes.
- the oil-based lubricant has a dynamic viscosity of 100,000 mm 2 / s or less when the ambient temperature is 130 ° C.
- the kinematic viscosity is 300 mm 2 / s or more.
- the temperature around the interior of the vehicle is 130 ° C.
- the dynamic viscosity is 100,000 mm 2 / s or less
- the ambient temperature is 60 ° C.
- the dynamic viscosity is By setting the diameter to 300 mm 2 Zs or more, it is possible to reduce the vibration caused by the rattling noise while preventing a decrease in steering feeling and a decrease in steering responsiveness.
- the bearing supporting the small gear shaft, the bearing supporting the large gear shaft, or the small gear shaft is characterized by including a lubricant seal that prevents the oil lubricant from leaking.
- the bearing supporting the small gear shaft, or the bearing supporting the large gear shaft, or the bearing supporting the small gear shaft and the large gear shaft is provided with a lubricant seal.
- the leakage of the grease lubricant injected into the housing can be prevented.
- the present invention it is possible to reduce the vibration due to tooth hitting noise caused by the road surface reaction force without clogging the backlash, and the steering feeling is reduced due to excessive filling of the grease lubricant. It is possible to reduce the deterioration of the steering response.
- the inner surface of the housing has a smooth shape in which the grease lubricant flows smoothly, it is also possible to reduce the unevenness of the steering feeling caused by the change in the posture of the car. It becomes.
- FIG. 1 is a cross-sectional view in a plane including the central axis of a steering shaft and the central axis of rotation of an electric motor, of an electric power steering apparatus using a reduction gear according to an embodiment of the present invention.
- FIG. 2 is a cross-sectional view of a large gear and a small gear of a housing that accommodates a pair of gears in the reduction gear, in a direction perpendicular to the rotation axis of the small gear.
- FIG. 3 is a cross-sectional view of a large gear and a small gear of another housing accommodating a pair of gears in the reduction gear, in a direction perpendicular to the rotation axis.
- Fig. 4 is a partially enlarged cross-sectional view of the housing, as seen from the side of the car, showing a state in which a grease lubricant has been injected into the housing.
- FIG. 5 is an arrangement explanatory view of a lubricant seal material of the reduction gear according to the embodiment of the present invention.
- FIG. 6 is a layout explanatory view of a lubricant seal material of the reduction gear according to the embodiment of the present invention. Explanation of sign
- FIG. 1 is a cross-sectional view in a plane including a central axis of a steering shaft and a central axis of rotation of an electric motor, showing a schematic configuration of an electric power steering apparatus using a reduction gear according to an embodiment of the present invention.
- the steering torque acting on the steering wheel 5 is transmitted to the steering wheel side via the steering shaft 6, the torque bar 7, and the gear shaft 8, and the auxiliary torque of the electric motor 4 is reduced in speed. It is transmitted to the steering wheel side via the gear shaft 8.
- the steering shaft 6 is connected to the steering wheel 5 and is a component of a Tonolek transmission means for transmitting the steering torque acting on the steering wheel 5 to the steering wheel side.
- Torsion bar 7 connects steering shaft 6 and gear shaft 8 and causes torsional deformation by the steering torque, and a relative rotational angle displacement between steering shaft 6 and gear shaft 8 Give rise to
- the torque bar 7 is not only a component of the torque transmission means but also a component of the torque detection mechanism.
- the gear shaft 8 transmits the steering torque from the torque bar 7 to the steering wheel side, and transmits the auxiliary torque of the electric motor 4 from the reduction gear 3 to the steering wheel side.
- the gear shaft 8 is also a component of the torque transmission means.
- the reduction gear 3 includes a large gear 2 provided on the gear shaft 8 and a small gear 1 provided on the rotation shaft 10 of the electric motor 4.
- the large gear 2 and the small gear 1 are spur gears or helical gears.
- the torque detection mechanism 9 detects steering torque by detecting the displacement of the relative rotation angle between the gear shaft 8 and the steering shaft 6 caused by the torque bar 7 being twisted by the steering torque. To detect.
- FIG. 2 is a cross-sectional view of the large gear 2 and the small gear 1 of the housing 11 for housing a pair of gears in the reduction gear 3 according to the embodiment of the present invention in a direction perpendicular to the rotation axis.
- the end opposite to the joint portion of both gears has an arc shape. The ends are connected by circumscribed lines of both arcs.
- the radius of the arc on the small gear 1 side may be increased, or as shown in FIG. 3 (b), it may be a smooth curve instead of an arc.
- the oil lubricant is injected into the inside of the housing 11, it is necessary to make sure that there are no corners or protrusions that would block the moving flow of the oil lubricant. It is necessary to prevent the part where the agent stagnates.
- the housing 11 has a cross section perpendicular to the axial direction of the small gear shaft and the large gear shaft, and the end of the circular arc portion storing the large gear 2 and the end of the circular arc portion storing the small gear 1 It is necessary to have an inner surface having a shape that monotonously increases from the small gear side to the large gear side in a direction perpendicular to the axial center direction of the small gear shaft and the large gear shaft between the two. With such a shape, the oil-based lubricant injected into the housing 11 smoothly moves in the housing 11 in accordance with the posture change of the vehicle without stagnation or stagnation on the inner surface of the housing 11. You can
- the dynamic viscosity is 100, OOOmm 2 Zs or less in the case of temperature force S_30 ° C in a motor, and the dynamic temperature is 60 ° C or less.
- the viscosity is preferably 3 OO mm 2 / s or more. Generally, as the temperature in the car increases, the viscosity of the grease lubricant decreases rapidly.
- the dynamic viscosity is 300 mm 2 / s or more, thereby alleviating the vibration due to the rattling noise while preventing the deterioration of the steering feeling and the steering responsiveness. it can.
- FIG. 4 is a partial enlarged cross-sectional view of the housing 11 as seen from the side of the vehicle, showing a state where the grease lubricant 14 is injected into the housing 11.
- the grease lubricant 14 is injected into the housing 11.
- FIG. 4 if a part of the portion where the small gear 1 and the large gear 2 meet if the fat and oil lubricant 14 is not completely filled in the housing 11, it is in a state where it is immersed in the fat and oil lubricant 14 It is enough.
- the oil-based lubricant 14 makes it possible to reduce the vibration caused by the rattle noise, and to maintain the balance between the two.
- the amount of the fat lubricant 14 is small in FIG. 4, the diffusion range of the fat lubricant 14 due to the behavior of the car is limited. Therefore, it is possible to prevent the grease lubricant 14 from leaking to the outside of the housing 11 by providing the lubricant sealing material 15 on the inner side of the housing for the bearing 12 that supports the rotating shaft 10. Become.
- the grease lubricant 14 is provided outside the housing 11 by providing the lubricant sealing material 15 on the inner side of the housing 11 also for the bearing 13 that supports the gear shaft 8. Can be reliably prevented.
- Lubricant sealing material 15 is not limited to being provided on the inner side of housing 11.
- lubricant sealing material 15 may be provided on the outer side of housing 11, as shown in FIG. .
- the bearing provided with the lubricant seal material 15 is also provided only for the bearing 12 supporting the rotating shaft 10 if the injection amount of the oil lubricant 14 is small, and the shaft for the gear shaft is increased as the injection amount of the oil lubricant 14 increases. If it is also provided for the bearing 13 that supports 8, please let us know.
- the posture of the car changes.
- the grease lubricant 14 can be prevented from leaking to the outside through the bearing, and a part of the portion where the small gear 1 and the large gear 2 are in contact can be reliably maintained in the grease lubricant 14.
- the presence of the fat and oil lubricant 14 makes it possible to reduce the vibration caused by the rattling noise, and it becomes possible to balance the two in a well-balanced manner.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Power Steering Mechanism (AREA)
- General Details Of Gearings (AREA)
- Gear Transmission (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/570,297 US7536930B2 (en) | 2003-08-28 | 2004-08-27 | Reduction gear unit |
JP2005513466A JP4742869B2 (ja) | 2003-08-28 | 2004-08-27 | 減速機 |
EP04772304.4A EP1662177B1 (en) | 2003-08-28 | 2004-08-27 | Speed reducer |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003-305381 | 2003-08-28 | ||
JP2003305381 | 2003-08-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005022004A1 true WO2005022004A1 (ja) | 2005-03-10 |
Family
ID=34269299
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/012348 WO2005022004A1 (ja) | 2003-08-28 | 2004-08-27 | 減速機 |
Country Status (4)
Country | Link |
---|---|
US (1) | US7536930B2 (ja) |
EP (1) | EP1662177B1 (ja) |
JP (1) | JP4742869B2 (ja) |
WO (1) | WO2005022004A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105276088A (zh) * | 2015-11-17 | 2016-01-27 | 江苏瑞星减速机有限公司 | 一种水处理环保专用减速机 |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4273908B2 (ja) * | 2003-10-01 | 2009-06-03 | 株式会社ジェイテクト | 電動パワーステアリング装置 |
CN103442969B (zh) * | 2011-03-29 | 2016-02-17 | 株式会社捷太格特 | 电子助力转向设备 |
RU2600279C1 (ru) * | 2015-07-22 | 2016-10-20 | Николай Викторович Мендрух | Вал-шестерня |
RU2598131C1 (ru) * | 2015-07-22 | 2016-09-20 | Николай Викторович Мендрух | Вал - шестерня |
US10793183B2 (en) * | 2017-12-22 | 2020-10-06 | Trw Automotive U.S. Llc | Torque overlay steering apparatus |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4726775Y1 (ja) | 1968-09-08 | 1972-08-17 | ||
JPS6375644U (ja) * | 1986-11-06 | 1988-05-20 | ||
JPH01145668U (ja) * | 1988-03-17 | 1989-10-06 | ||
JPH06504B2 (ja) * | 1985-12-09 | 1994-01-05 | 株式会社ユニシアジェックス | 電動式パワ−ステアリング装置 |
JPH09152020A (ja) * | 1995-11-29 | 1997-06-10 | Toyo Electric Mfg Co Ltd | 歯車装置 |
JPH11124045A (ja) | 1996-03-28 | 1999-05-11 | Fuji Kiko Co Ltd | 電動パワーステアリング装置 |
JP2002147575A (ja) | 2000-08-30 | 2002-05-22 | Koyo Seiko Co Ltd | 歯車、減速歯車機構及び電動式舵取装置 |
JP2003002219A (ja) * | 2001-06-27 | 2003-01-08 | Nsk Ltd | 電動パワーステアリング装置 |
JP2003034254A (ja) * | 2001-07-24 | 2003-02-04 | Koyo Seiko Co Ltd | 電動式動力舵取装置 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4726775U (ja) | 1971-04-10 | 1972-11-27 | ||
JPS5865492A (ja) * | 1981-10-15 | 1983-04-19 | ヤマハ株式会社 | 電子楽器 |
JPS5865492U (ja) * | 1981-10-28 | 1983-05-04 | いすゞ自動車株式会社 | 変速機の油面調整装置 |
JP2991860B2 (ja) | 1992-06-19 | 1999-12-20 | 新日本製鐵株式会社 | 鋼帯の冷間圧延方法 |
JP2003034257A (ja) * | 2001-07-25 | 2003-02-04 | Koyo Seiko Co Ltd | 電動式動力舵取装置 |
-
2004
- 2004-08-27 WO PCT/JP2004/012348 patent/WO2005022004A1/ja active Application Filing
- 2004-08-27 EP EP04772304.4A patent/EP1662177B1/en not_active Expired - Fee Related
- 2004-08-27 US US10/570,297 patent/US7536930B2/en not_active Expired - Fee Related
- 2004-08-27 JP JP2005513466A patent/JP4742869B2/ja not_active Expired - Fee Related
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4726775Y1 (ja) | 1968-09-08 | 1972-08-17 | ||
JPH06504B2 (ja) * | 1985-12-09 | 1994-01-05 | 株式会社ユニシアジェックス | 電動式パワ−ステアリング装置 |
JPS6375644U (ja) * | 1986-11-06 | 1988-05-20 | ||
JPH01145668U (ja) * | 1988-03-17 | 1989-10-06 | ||
JPH09152020A (ja) * | 1995-11-29 | 1997-06-10 | Toyo Electric Mfg Co Ltd | 歯車装置 |
JPH11124045A (ja) | 1996-03-28 | 1999-05-11 | Fuji Kiko Co Ltd | 電動パワーステアリング装置 |
JP2002147575A (ja) | 2000-08-30 | 2002-05-22 | Koyo Seiko Co Ltd | 歯車、減速歯車機構及び電動式舵取装置 |
JP2003002219A (ja) * | 2001-06-27 | 2003-01-08 | Nsk Ltd | 電動パワーステアリング装置 |
JP2003034254A (ja) * | 2001-07-24 | 2003-02-04 | Koyo Seiko Co Ltd | 電動式動力舵取装置 |
Non-Patent Citations (1)
Title |
---|
See also references of EP1662177A4 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105276088A (zh) * | 2015-11-17 | 2016-01-27 | 江苏瑞星减速机有限公司 | 一种水处理环保专用减速机 |
Also Published As
Publication number | Publication date |
---|---|
EP1662177A4 (en) | 2009-07-29 |
US20070006674A1 (en) | 2007-01-11 |
EP1662177B1 (en) | 2014-03-12 |
US7536930B2 (en) | 2009-05-26 |
EP1662177A1 (en) | 2006-05-31 |
JP4742869B2 (ja) | 2011-08-10 |
JPWO2005022004A1 (ja) | 2007-11-01 |
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