EP3362704A1 - Gewindetrieb mit zumindest einem lager als planeten - Google Patents
Gewindetrieb mit zumindest einem lager als planetenInfo
- Publication number
- EP3362704A1 EP3362704A1 EP16757635.4A EP16757635A EP3362704A1 EP 3362704 A1 EP3362704 A1 EP 3362704A1 EP 16757635 A EP16757635 A EP 16757635A EP 3362704 A1 EP3362704 A1 EP 3362704A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- thread
- holder
- screw drive
- threaded spindle
- bearing
- 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.)
- Withdrawn
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
- 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
- F16H25/22—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members
- F16H25/2247—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members with rollers
- F16H25/2252—Planetary rollers between nut and screw
-
- 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
- F16H25/22—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members
- F16H25/2247—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members with rollers
-
- 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
- F16H25/22—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members
- F16H25/2285—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members with rings engaging the screw shaft with the inner perimeter, e.g. using inner rings of a ball bearing
- F16H25/2295—Rings which are inclined or can pivot around an axis perpendicular to the screw shaft axis
-
- 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
- F16H25/24—Elements essential to such mechanisms, e.g. screws, nuts
-
- 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
- F16H25/22—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members
- F16H25/2247—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members with rollers
- F16H2025/228—Screw mechanisms having rollers being supported by the screw shaft and engaging the nut
Definitions
- roller screw drives in which rollers located around a threaded spindle in a cage roll on the thread of a threaded spindle.
- the rollers have a thread adapted to the thread of the threaded spindle and are axially mounted in the cage, which forms a holder.
- the rollers thus form planets that revolve around the threaded spindle, whereby the holder linearly along the
- Threaded spindle is transported.
- the person skilled in ball screws are further known in which balls are held by a holder around the threaded spindle in the recesses of the thread of a threaded spindle.
- the holder further has a ball return, with which, depending on the linear transport direction of the holder, the balls in the direction of the transport direction are returned from the back again forward into the recesses of the thread.
- the balls thus form planets that revolve around the threaded spindle, whereby the holder is transported linearly along the threaded spindle.
- the invention has for its object to provide a screw which can be made structurally simple and inexpensive and still has a long life.
- this task is solved in that the at least one planet is formed by a bearing, with its outer ring or with its inner ring engages over an angular section in the thread of the element.
- the inner rings engage in the thread of a
- Threaded spindle wherein the curvature of the inner rings conforms to the curvature of the threaded spindle. This causes the diameter of the bearings
- Transport direction can record.
- the outer rings engage in the thread of a hollow cylinder provided with an internal thread, wherein the curvature of the outer rings conforms to the curvature of the hollow cylinder. Due to the arrangement of the bearings in the hollow cylinder, the outer diameter of the hollow cylinder forms the widest point of the screw drive. Furthermore, results in this embodiment, as in the second Variant in that the grooves or webs of the outer rings of the bearing engage over a relatively large angle section in the thread of the hollow cylinder and thus relatively large carrying forces in the transport direction or against the
- Transport direction can record.
- FIG. 2 shows a plan view of the screw drive according to FIG. 1.
- FIG. 3 shows a sectional drawing of a side view of a screw drive with two
- FIG. 4 shows a sectional drawing of a side view of a screw drive with two
- Ball bearings that engage with their inner rings in the thread of the threaded spindle.
- FIG. 5 shows a plan view of the screw drive according to FIG. 4.
- FIG. 6 shows a sectional drawing of a side view of a screw drive with two
- Ball bearings which engage with their outer rings in the internal thread of a hollow cylinder.
- FIG. 7 shows a plan view of the screw drive according to FIG. 6.
- Figure 1 shows a side view of a screw 1 with three ball bearings 2, each having an outer ring 3, an inner ring 4 and arranged between the outer ring 3 and the inner ring 4 balls 5.
- the ball bearings 2 engage with their outer rings 3 in the thread 6 of a threaded spindle 7 a.
- the three ball bearings 2 each form a planet and are held together by a holder 8 shown symbolically in FIG.
- the outer rings 3 of the ball bearing 2 have webs 10 which are connected to the thread 6 of
- Thread 6 of the threaded spindle 7 and the web 10 of the outer ring 3 are oriented differently engages the outer ring 3 only over a relatively short angle section 11 in the thread 6 a.
- Figure 2 shows the screw drive 1 from above, wherein two of the three ball bearings 2 at an angle of about 100 degrees to each other and each at an angle of 130 degrees to the third ball bearings 2 are held fixed in the holder 8.
- an asymmetrical arrangement of the three ball bearings 2 in order to allow in a preferred direction more carrying capacity (transverse to the longitudinal axis 15 of the threaded rod 7), or a symmetrical arrangement of the ball bearings 2 offset by 120 degrees may be advantageous.
- FIG. 3 shows a sectional drawing of a side view of a screw drive 12 according to a further exemplary embodiment of the invention.
- the screw 12 has two groups 13 of two ball bearings 2 per group 13, wherein the four ball bearings 2 engage with their outer rings 3 in the thread 6 of a threaded spindle 7.
- each group 13 of two ball bearings 2 forms a planet, wherein the two ball bearings 2 of a group 13 are connected by a bearing holder 14 with its inner rings 4.
- the ball bearings 2 of the two groups 13 engage with their outer rings 3 offset by about 180 degrees in the thread 6 of the threaded spindle 7 a.
- the bearing holder 14 form parts of the holder, not shown, and are connected via this.
- the two axes 23 of the ball bearings 2 of a group 13 are tilted relative to one another in the bearing holder 14, whereby a better guidance of the webs 10 in the thread 6 of the threaded spindle 7 is given. In addition, there is a better initiation of the carrying capacity of the holder in the threaded spindle. 7
- the one bearing holder 14 now has a web 16 and the other bearing holder 14 has a groove 22, with which they engage in the thread 6 of the threaded spindle 7.
- a better guidance of the holder in the linear movement of the holder or the threaded spindle 7 along a transport direction 9 is given.
- the ball bearings 2 holding together holders 8 can be built very short, which is why the threaded spindle 7 must be only slightly longer than the parallel to the longitudinal axis 15 of the threaded spindle 7 lying transport path.
- the advantage is obtained that with a limited length of the threaded spindle 7, a particularly long transport path or adjustment of the holder or the threaded spindle 7 is possible.
- FIG. 4 shows a sectional drawing of a side view of a screw drive 17 according to FIG a further embodiment of the invention with two ball bearings 18 which engage with their webs 19 of the inner rings 20 in the thread 6 of the threaded spindle 7.
- the ball bearings 18 each form planets, which are offset by their inner rings 20 each offset by about 180 degrees in a holder, not shown, engage in the thread 6 of the threaded spindle 7.
- Inner ring 20 are the same orientation engages the inner ring 20 via a relatively large angular portion 21 shown in Figure 5 in the thread 6 a. As a result, a very good power transmission and leadership of the holder is given. Furthermore, the advantage is obtained that the two ball bearings 18, and thus also the entire bracket to the
- the axes of the ball bearings 18 are tilted to the longitudinal axis 15 of the threaded spindle 7, which can be seen in Figure 4, that from one ball bearing 18, the top and from the other ball bearing 18 is the bottom.
- the ball bearings 18 are tilted about the pitch of the thread 6 of the threaded spindle 7 in the holder. As a result, a particularly uniform running of the webs 19 in the thread 6 is achieved.
- Embodiments of the screw 12 and 17 is not shown, is fixed against rotation and the threaded spindle 7 is rotatable or that the threaded spindle 7 is fixed against rotation and the holder is rotatable. In both ways, whether the threaded spindle 7 is fixed against rotation or the holder is fixed against rotation, either the
- Figure 6 shows a sectional view of a side view of a screw 24 according to another embodiment of the invention with two ball bearings 25, with their Webs 26 of the outer rings 27 engage in the internal thread 28 of a hollow cylinder 29.
- the ball bearings 25 form planets, which are offset with their inner rings 33 by about 180 degrees offset on the holder 30 into the internal thread 28 of the hollow cylinder 29 engage.
- the ball bearings 27 are tilted to the slope 30 of the internal thread 28 of the hollow cylinder 29 fixed to the holder 30. As a result, a particularly uniform running of the webs 26 is achieved in the internal thread 28.
- Outer rings 27 can be seen from Figures 6 to 7, the ball bearings 25th
- bracket 30 are built very short, which is why the hollow cylinder 29 only has to be slightly longer than the parallel to the longitudinal axis 32 of the hollow cylinder 29 lying transport path. This has the advantage that with a limited length of the hollow cylinder 29, a particularly long transport path or adjustment of the holder 30 and the hollow cylinder 29 is possible.
- the holder 30 is held by a cylinder 35 which protrudes from one end of the hollow cylinder 35.
- the cylinder 35 is designed as kink-resistant as possible.
- Threaded spindle is better protected against contamination and with closed ends of the hollow cylinder 29 of the screw 24 can also be used in environments that pollute quickly and heavily, such as in drives in milling machines that lay with chips.
- this embodiment of the screw drive 24 there is the possibility that either the holder 30 is fixed against rotation and the hollow cylinder 29 is rotatable or that the hollow cylinder 29 is fixed against rotation and the holder 30 is rotatable. In both ways, whether the hollow cylinder 29 is fixed against rotation or the holder 30 is fixed against rotation, either the hollow cylinder 29 may be fixed axially and the holder 30 along a
- Transport direction 34 be movable or the holder 30 may be axially fixed and the hollow cylinder 29 along the transport direction 34 to be moved.
- bearings can be used in the screw drives according to the invention, such as different types and shapes of rolling and / or plain bearings.
- Rolling bearings of the following type are particularly advantageous: ball bearings; Cone bearing; Roller bearings.
- screw drives according to the invention can have two, three, four or even more bearings in a common holder.
- a larger number of bearings allows a greater load capacity of the screw drive.
- grooves can be provided in both the outer rings and in the inner rings of the bearings, which engage in the web of the thread of the threaded spindle.
- any member having a bore with an internal thread and consequently not limited to tubes can also be seen.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transmission Devices (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ATA50876/2015A AT517943B1 (de) | 2015-10-15 | 2015-10-15 | Gewindetrieb mit zumindest einem Lager als Planeten |
PCT/EP2016/070000 WO2017063780A1 (de) | 2015-10-15 | 2016-08-24 | Gewindetrieb mit zumindest einem lager als planeten |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3362704A1 true EP3362704A1 (de) | 2018-08-22 |
Family
ID=56802487
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16757635.4A Withdrawn EP3362704A1 (de) | 2015-10-15 | 2016-08-24 | Gewindetrieb mit zumindest einem lager als planeten |
Country Status (4)
Country | Link |
---|---|
US (1) | US20180313437A1 (de) |
EP (1) | EP3362704A1 (de) |
AT (1) | AT517943B1 (de) |
WO (1) | WO2017063780A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR102037482B1 (ko) * | 2018-03-08 | 2019-10-28 | 주식회사 위너 | 베어링 스크류 이송 장치 |
Family Cites Families (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2780740A (en) * | 1955-03-25 | 1957-02-05 | Westinghouse Electric Corp | Linear motion device |
CH423395A (de) * | 1965-06-16 | 1966-10-31 | Contraves Ag | Schraubgetriebe |
DE1750637C3 (de) * | 1968-05-21 | 1973-12-13 | Hamuel Werkzeugfabrik Th. Kirschbaum Kg, 8590 Marktredwitz | Rollspindel |
DE1949049C3 (de) * | 1969-09-29 | 1980-09-04 | Robert Dr.-Ing. 6308 Butzbach Gaertner | Spindeltrieb |
US3614900A (en) * | 1970-05-08 | 1971-10-26 | Wahlmark Systems | Anti-friction drive |
DE2026550C3 (de) * | 1970-05-30 | 1981-04-16 | Gärtner, Robert, Dr.-Ing., 6308 Butzbach | Schraubengetriebe |
US3730016A (en) * | 1971-06-14 | 1973-05-01 | Continental Can Co | Friction drive differential screw |
DE2262062C2 (de) * | 1972-12-19 | 1974-12-05 | Robert Dr.-Ing. 6308 Butzbach Gaertner | Schraubenantrieb |
DE3417056A1 (de) * | 1984-05-09 | 1985-11-14 | Robert Dr.-Ing. 6308 Butzbach Gärtner | Spindelantrieb |
JPS61286663A (ja) * | 1985-06-13 | 1986-12-17 | Nippon Denso Co Ltd | 送りねじ装置 |
EP0410032B1 (de) * | 1989-07-26 | 1992-10-14 | FAG (Schweiz) | Mutter für Gewindespindel |
JP2594535Y2 (ja) * | 1991-05-21 | 1999-04-26 | 株式会社協豊製作所 | 送りねじ装置 |
JPH11241755A (ja) * | 1998-02-26 | 1999-09-07 | Nippon Seiko Kk | ボールねじ装置 |
US6244125B1 (en) * | 1998-06-10 | 2001-06-12 | Koyo Seiko Co., Ltd. | Movement transforming device and power steering apparatus |
US6516680B1 (en) * | 1998-10-15 | 2003-02-11 | Koyo Seiko Co., Ltd. | Power steering apparatus |
DE102007009122B4 (de) * | 2007-02-24 | 2008-12-04 | Wilhelm Narr Gmbh & Co. Kg | Vorrichtung zur Umwandlung einer Drehbewegung in eine Axialbewegung |
DE102007009626A1 (de) * | 2007-03-03 | 2008-09-04 | Tirron-Elektronik Gmbh | Linearantrieb mit einer Gewindespindel und einer Wälzlagermutter |
KR100919909B1 (ko) * | 2007-11-26 | 2009-10-14 | 송천복 | 가공오차 보정이 가능한 베어링 스크류 이송장치 |
WO2011040690A1 (ko) * | 2009-09-29 | 2011-04-07 | Song Cheon Bok | 컨택 노출형 베어링 스크류 이송장치 |
JP5091958B2 (ja) * | 2010-01-26 | 2012-12-05 | 株式会社日立製作所 | 送りネジ装置、リニアアクチュエータ及びリフト装置 |
JP4967036B2 (ja) * | 2010-02-05 | 2012-07-04 | 株式会社日立製作所 | 回転直動変換機構及びリフト装置 |
JP2011179539A (ja) * | 2010-02-26 | 2011-09-15 | Ntn Corp | 電動式直動アクチュエータおよび電動式ブレーキ装置 |
US9845850B2 (en) * | 2015-01-30 | 2017-12-19 | Irobot Corporation | Robotic arm and wrist mechanisms |
-
2015
- 2015-10-15 AT ATA50876/2015A patent/AT517943B1/de not_active IP Right Cessation
-
2016
- 2016-08-24 EP EP16757635.4A patent/EP3362704A1/de not_active Withdrawn
- 2016-08-24 WO PCT/EP2016/070000 patent/WO2017063780A1/de active Application Filing
- 2016-08-24 US US15/768,529 patent/US20180313437A1/en not_active Abandoned
Also Published As
Publication number | Publication date |
---|---|
WO2017063780A1 (de) | 2017-04-20 |
AT517943B1 (de) | 2017-06-15 |
AT517943A4 (de) | 2017-06-15 |
US20180313437A1 (en) | 2018-11-01 |
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