WO2015007709A1 - Spindeltrieb - Google Patents
Spindeltrieb Download PDFInfo
- Publication number
- WO2015007709A1 WO2015007709A1 PCT/EP2014/065090 EP2014065090W WO2015007709A1 WO 2015007709 A1 WO2015007709 A1 WO 2015007709A1 EP 2014065090 W EP2014065090 W EP 2014065090W WO 2015007709 A1 WO2015007709 A1 WO 2015007709A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- spindle
- reservoir
- displacement body
- drive
- spindle drive
- 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
- F16H57/048—Type of gearings to be lubricated, cooled or heated
- F16H57/0497—Screw mechanisms
-
- 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
- F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
- F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
- F16H25/20—Screw mechanisms
-
- 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
- F16H57/0463—Grease lubrication; Drop-feed lubrication
- F16H57/0464—Grease lubrication
Definitions
- the invention relates to a spindle drive.
- the invention relates to a
- a spindle drive comprises a spindle and a spindle nut which are mounted coaxially to a common axis of rotation.
- the spindle nut carries an internal thread and the spindle has an external thread, the two threads meshing with each other. If nut and spindle are rotated relative to one another about the axis of rotation, a translatory movement occurs along the axis of rotation between spindle and spindle nut.
- the spindle nut is configured to be rotated about the axis of rotation to translate the spindle along the axis of rotation.
- the spindle drive can be used for example in an electro-hydraulic actuator for use on board a motor vehicle.
- the spindle can act axially on a hydraulic piston which is accommodated in a hydraulic cylinder.
- An electric motor may be provided for rotation of the spindle nut. The rotation of the electric motor is converted by the spindle drive into a translatory movement and by the piston into a volumetric flow or a pressure change of a hydraulic fluid in the cylinder.
- a brake or clutch device can be actuated by means of the electric motor.
- DE 10 201 1 108 962 A1 shows an electrically driven spindle drive.
- DE 10 2009 005 886 A1 shows a further spindle drive with a lubrication channel in order to wet the threads on the spindle and the spindle nut with a lubricant when the spindle is in a predetermined parking position with respect to the spindle nut.
- the spindle drive can be sensitive to a lack of lubricant in the intermeshing thread. If a lubricating film breaks off in the area of the threads so that sections of the threads rub against each other in a dry manner, one or both threads may be exposed to heavy wear. Abrasion of the thread flanks can exert the effect of an abrasive on further thread flanks, so that they also wear out more quickly. In extreme cases, the spindle can break, slip axially on the spindle nut or spindle and spindle nut can seize each other, so that no further relative movement is possible. Such damage occurs in particular at high mechanical loads, high numbers of cycles or high ambient temperatures, as they may be in the range of actuators in motor vehicles.
- An inventive spindle drive for conversion between a rotary and a translational movement comprises a spindle for translational movement and a spindle nut for rotational movement, wherein the spindle and the spindle nut are coupled together by means of threads.
- Spindle nut includes in the axial extension of its thread a reservoir into which extends a portion of the spindle.
- a lubricant is accommodated in the reservoir and a displacement body is mounted on the spindle in the area of the reservoir, extending radially outward than the thread of the spindle.
- the displacement body moves together with the spindle in the axial direction when the spindle nut is rotated relative to the spindle. As a result, the lubricant in the reservoir is circulated from one axial side of the displacement body to the other.
- wetting of the thread of the spindle can be achieved in an improved manner, so that the lubricant is distributed along the space between the threads of the spindle nut and the spindle during repeated axial movements of the spindle. Dry running of the spindle drive can be prevented. Circulation also prevents the lubricant from clumping so that an increased amount of lubricant can be used to lubricate the two threads. Further, by the circulation, separation of various components of the lubricant such as a base oil and a thickener can be prevented. The improved lubrication can provide an increased load capacity or improved reliable spindle drive.
- the reservoir extends axially at least as far as the spindle is axially movable. It is particularly preferred that the two axial dimensions correspond approximately. So can an optimal circulation or
- Mixing of the lubricant can be achieved in the reservoir.
- a spindle drive with a known working or maximum stroke for example for actuating a clutch
- the axial mobility of the spindle and the axial extent of the reservoir can be exactly matched to each other.
- the spindle dives only on one side into the reservoir. In a preferred embodiment, however, the spindle completely passes through the reservoir.
- the change in the volume of the spindle received in the reservoir via the stroke of the spindle is less variable or not at all variable. Due to the reduced displacement work, a mechanical resistance can be reduced.
- the reservoir is rotationally symmetric. This can avoid that lubricant accumulates in a radial pocket, where it is not circulated. It is particularly preferred that the reservoir has a cylindrical shape. An annular gap between the radial boundary of the reservoir and the rotational body of the displacement body can ensure a uniform circulation of the lubricant in the reservoir.
- the displacement body may be rotatably connected to the spindle. As a result, the lubricant can also be imparted with a rotational movement, which can contribute to improved circulation.
- the displacement body can be rotationally symmetrical.
- the displacement body may comprise a plastic disc which is injection-molded around the spindle or is pressed onto the spindle.
- the radial gap between the displacement body and the boundary of the reservoir can be kept particularly accurate. A lump of the lubricant larger than the gap distance can thereby be reliably prevented from axially passing the displacer. Instead, the lump can be shattered in the gap.
- the displacement body comprises a disk which is open on one side, the spindle having a radial groove for mounting the disk.
- a disk is known as a backup or Bz disk. Due to the radial assembly, the joining of the parts of the spindle drive can be facilitated.
- the lubricant preferably comprises a low viscosity grease.
- the lubricant may comprise a hot bearing grease.
- the lubricant may be mixed with a dry lubricant such as graphite or molybdenum disulfide.
- a vent is provided for communicating the reservoir with an environment. The change in the remaining volume in the reservoir when the spindle is moved axially with respect to the spindle nut, can be compensated improved.
- Figure 1 shows a spindle drive in a first view
- Figure 2 shows the spindle drive of Figure 1 in a second view
- FIG. 3 shows a displacement body for the spindle drive from one of FIGS. 1 or 2.
- FIG. 1 shows a spindle drive 100, in particular for use on board a motor vehicle.
- the spindle drive 100 can be provided for example for the axial actuation of a hydraulic piston in a hydraulic cylinder.
- the spindle drive 100 comprises a spindle 105 with an external thread 1 10 and a spindle nut 1 15 with an internal thread 120, wherein the threads 1 10 and 120 mesh with each other and are arranged coaxially to a rotation axis 125.
- the illustrated spindle nut 1 15 is supported in the radial direction by means of a radial bearing 130. It can also be used another camp, which is adapted to receive axial or tilting forces.
- the spindle nut 1 15 by means of a worm gear 135 with an electric motor (not shown) is connected.
- the worm gear 135 comprises a worm wheel 140, which is embodied here in one piece with the spindle nut 15 and coaxial with the axis of rotation 125, and a worm 145, which meshes with the worm wheel 140 and is adapted for attachment to a shaft of the electric motor.
- a worm gear 135 instead of the worm gear 135 and another means for power transmission to the spindle nut 1 15 may be provided.
- a reservoir 150 is formed, which is adapted to receive a lubricant 155.
- the reservoir 150 is in axial extension of the internal thread 120 of the spindle nut 1 15.
- the reservoir 150 with respect to the axis of rotation 125 is preferably rotationally symmetrical, in particular circular cylindrical executed.
- the spindle 105 is adapted to undergo a maximum axial travel along the axis of rotation 125. Regardless of the position of the spindle 105 on its working path is always a portion of the spindle 105 in the reservoir 150. In this case, the spindle 105 with an axial end more or less deeply immersed in the reservoir 150 or as in the illustrated embodiment. form completely pass through the reservoir 150.
- a sealing element 160 is preferably provided to seal the reservoir 150 at a first axial end with respect to the spindle 105. At the other axial end of the reservoir 150 are the intermeshing portions of the external thread 1 10 of the spindle and the internal thread 120 of the spindle nut 1 15th
- a displacement body 165 is attached to the spindle 105.
- the displacement body 165 extends in the radial direction further than the outer teeth 110 of the spindle 105 and may have different shapes, as will be explained in more detail below with reference to FIG. Of the
- Displacer 165 is axially fixed to the spindle 105 so that the displacer 165 moves axially through the reservoir 150 when the spindle 105 is moved axially with respect to the spindle nut 15.
- the displacement body 165 circulates the lubricant 155 in the reservoir 150 so that the external thread 110 of the spindle 105 is wetted with lubricant 155 in an improved manner.
- Rotary movement of the internal thread 120 of the spindle nut 1 15 can then continue to carry the lubricant 155 in the axial direction and thus ensure a lubricating film between the internal thread 120 and the external thread 110 along the entire engagement region.
- the displacement body 165 may be fixed in the circumferential direction fixed or loose on the spindle 105.
- a groove 170 may be introduced for the axial fixation of the displacement body 165.
- it is a radial annular groove.
- a vent 175 is provided to equalize the pressure of the reservoir with an environment when, for example, a portion of the lubricant 155 leaves the reservoir.
- FIG. 2 shows the spindle drive 100 from FIG. 1 in a second view in a further embodiment.
- the area of the reservoir 150 is shown enlarged.
- the displacement body 165 forms an annular gap 205 with a radial boundary of the reservoir 150.
- the displacement body 165 and the annular gap 205 divide the reservoir 150 into a first axial section 210, shown in FIG. 2 above, and a second axial section 215, in FIG shown.
- the changing volumes of the sections 210 and 215 force the lubricant 155 to pass through the annular gap 205.
- the lubricant 155 is circulated in the reservoir 150 and mixed.
- the lubricant 155 can thereby in an improved manner wet the external thread 110 of the spindle 105 and penetrate into the area between the external thread 110 and the internal thread 120 of the spindle nut 15.
- the threads 1 10 and 1 15 can be improved so provided with lubricant 155, whereby a life, a load capacity or reliability of the spindle drive 100 can be increased.
- the displacement body 165 may be realized in different ways on the spindle 105.
- FIG. 3 shows exemplary displacement bodies 165 for the spindle drive 100 from FIGS. 1 and 2. From top to bottom are a first displacement body 305, a second displacement body 310 and a third one
- the first displacement body 305 is adapted for axial mounting on the spindle 105.
- the illustrated first displacement body 305 is designed in the form of a shaft securing ring, which is also known as a Bz disk. It can also be a different design of Au h-locking ring can be used.
- the first displacement body 305 may be rotatable in the groove 170 of the spindle 105.
- the second displacement body 310 is provided for axial mounting on the spindle 105. Radially inwardly directed spring tongues allow for mounting and hold the second mounting body 310 in the axial direction in the groove 170.
- the third displacement body 315 has the shape of a run-flat or washer.
- the spindle 105 can for example be cohesively, for example by soldering or welding, attached to the spindle 105. It is also possible to execute the spindle 105 so that the third displacement body 315 is axially pressed in the groove 170 for attachment.
- the third displacement body 315 is made of plastic, for example, on the spindle 105. injected.
- the spindle 105 may also be made of plastic or steel, for example.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transmission Devices (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14/905,939 US20160160996A1 (en) | 2013-07-18 | 2014-07-15 | Spindle drive |
EP14741837.0A EP3022466A1 (de) | 2013-07-18 | 2014-07-15 | Spindeltrieb |
JP2016526574A JP6192829B2 (ja) | 2013-07-18 | 2014-07-15 | スピンドル駆動装置 |
CN201480040442.7A CN105358877B (zh) | 2013-07-18 | 2014-07-15 | 主轴传动机构 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102013214093.2 | 2013-07-18 | ||
DE102013214093.2A DE102013214093B4 (de) | 2013-07-18 | 2013-07-18 | Spindeltrieb |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2015007709A1 true WO2015007709A1 (de) | 2015-01-22 |
Family
ID=51212820
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2014/065090 WO2015007709A1 (de) | 2013-07-18 | 2014-07-15 | Spindeltrieb |
Country Status (6)
Country | Link |
---|---|
US (1) | US20160160996A1 (de) |
EP (1) | EP3022466A1 (de) |
JP (1) | JP6192829B2 (de) |
CN (1) | CN105358877B (de) |
DE (1) | DE102013214093B4 (de) |
WO (1) | WO2015007709A1 (de) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6416931B2 (ja) * | 2014-04-07 | 2018-10-31 | イグス ゲゼルシャフト ミット ベシュレンクター ハフトゥング | 非対称な内外ねじを備えたリード・スクリュー駆動装置及び対応するスピンドル・ナット |
DE102016207615A1 (de) | 2016-05-03 | 2017-11-09 | Schaeffler Technologies AG & Co. KG | Spindeltrieb |
KR101976504B1 (ko) * | 2017-07-27 | 2019-05-10 | 주식회사 만도 | 스크류 어셈블리의 윤활유 누유 방지 구조 및 이를 포함하는 차량 후륜 조향 장치 |
DE102017214812A1 (de) * | 2017-08-24 | 2019-02-28 | Robert Bosch Gmbh | Gewindetrieb |
FR3080164B1 (fr) * | 2018-04-11 | 2020-03-27 | Zodiac Data Systems | Actionneur incluant un systeme de lubrification integre |
WO2022113780A1 (ja) * | 2020-11-26 | 2022-06-02 | 日立Astemo株式会社 | 電動アクチュエータ |
DE102021205069A1 (de) * | 2021-05-19 | 2022-11-24 | BSH Hausgeräte GmbH | Spülbecken mit Spindelantrieb aus Kunststoff für höhenverstellbare Einsatzplatte |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1258643A1 (de) * | 2001-05-15 | 2002-11-20 | Nsk Ltd | Kugelumlaufspindel |
US20050252324A1 (en) * | 2004-04-21 | 2005-11-17 | Nsk Ltd. | Ball screw device |
US20060088430A1 (en) * | 2004-10-21 | 2006-04-27 | Kuroda Precision Industries, Ltd. | Ball screw lubricative sealing device |
TW200925460A (en) * | 2007-12-14 | 2009-06-16 | Hiwin Tech Corp | Self-lubricator powered ball (roller) screw |
US20090308690A1 (en) * | 2008-06-17 | 2009-12-17 | Hiwin Technologies Corp. | Ball screw device having lubricating device |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5230462Y2 (de) * | 1971-11-15 | 1977-07-12 | ||
CH627533A5 (de) * | 1978-01-27 | 1982-01-15 | Greiner Electronic Ag | Schraubengetriebe. |
JPS54156071U (de) * | 1978-04-21 | 1979-10-30 | ||
JP3367911B2 (ja) * | 1999-02-26 | 2003-01-20 | Thk株式会社 | 潤滑油供給装置及びこれを用いた転動体ねじ装置 |
DE102009005886A1 (de) | 2009-01-23 | 2010-07-29 | Robert Bosch Gmbh | Spindelantrieb und Verfahren zum Schmieren eines Spindelantriebs |
DE102009007952B4 (de) * | 2009-02-06 | 2012-04-12 | Sew-Eurodrive Gmbh & Co. Kg | Spindelmotor |
DE102011108962B4 (de) | 2010-12-29 | 2020-07-09 | Robert Bosch Gmbh | Elektrischer Spindelantrieb |
CN201982636U (zh) * | 2011-03-28 | 2011-09-21 | 漳州翊峰机械工业有限公司 | 一种滚珠丝杆螺母转动润滑结构 |
CN102635672A (zh) * | 2012-04-28 | 2012-08-15 | 南京康尼股份有限公司 | 一种适用于螺母丝杆传动机构的自动润滑装置 |
-
2013
- 2013-07-18 DE DE102013214093.2A patent/DE102013214093B4/de not_active Expired - Fee Related
-
2014
- 2014-07-15 CN CN201480040442.7A patent/CN105358877B/zh not_active Expired - Fee Related
- 2014-07-15 EP EP14741837.0A patent/EP3022466A1/de not_active Withdrawn
- 2014-07-15 JP JP2016526574A patent/JP6192829B2/ja not_active Expired - Fee Related
- 2014-07-15 US US14/905,939 patent/US20160160996A1/en not_active Abandoned
- 2014-07-15 WO PCT/EP2014/065090 patent/WO2015007709A1/de active Application Filing
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1258643A1 (de) * | 2001-05-15 | 2002-11-20 | Nsk Ltd | Kugelumlaufspindel |
US20050252324A1 (en) * | 2004-04-21 | 2005-11-17 | Nsk Ltd. | Ball screw device |
US20060088430A1 (en) * | 2004-10-21 | 2006-04-27 | Kuroda Precision Industries, Ltd. | Ball screw lubricative sealing device |
TW200925460A (en) * | 2007-12-14 | 2009-06-16 | Hiwin Tech Corp | Self-lubricator powered ball (roller) screw |
US20090308690A1 (en) * | 2008-06-17 | 2009-12-17 | Hiwin Technologies Corp. | Ball screw device having lubricating device |
Also Published As
Publication number | Publication date |
---|---|
JP6192829B2 (ja) | 2017-09-06 |
DE102013214093A1 (de) | 2015-01-22 |
DE102013214093B4 (de) | 2017-12-21 |
JP2016524112A (ja) | 2016-08-12 |
CN105358877A (zh) | 2016-02-24 |
US20160160996A1 (en) | 2016-06-09 |
EP3022466A1 (de) | 2016-05-25 |
CN105358877B (zh) | 2018-04-24 |
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