WO2008050543A1 - Dispositif à vis de corps de roulement - Google Patents
Dispositif à vis de corps de roulement Download PDFInfo
- Publication number
- WO2008050543A1 WO2008050543A1 PCT/JP2007/067274 JP2007067274W WO2008050543A1 WO 2008050543 A1 WO2008050543 A1 WO 2008050543A1 JP 2007067274 W JP2007067274 W JP 2007067274W WO 2008050543 A1 WO2008050543 A1 WO 2008050543A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- screw
- spiral groove
- nut
- side spiral
- teeth
- 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
- 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
- F16H25/2204—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members with balls
- F16H25/2233—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members with balls with cages or means to hold the balls in position
-
- 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
- Y10T74/18—Mechanical movements
- Y10T74/18568—Reciprocating or oscillating to or from alternating rotary
- Y10T74/18576—Reciprocating or oscillating to or from alternating rotary including screw and nut
- Y10T74/18728—Backlash
-
- 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
- Y10T74/19642—Directly cooperating gears
- Y10T74/19698—Spiral
- Y10T74/19702—Screw and nut
- Y10T74/19744—Rolling element engaging thread
- Y10T74/19781—Non-recirculating rolling elements
-
- 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
- Y10T74/19642—Directly cooperating gears
- Y10T74/19698—Spiral
- Y10T74/19702—Screw and nut
- Y10T74/19744—Rolling element engaging thread
- Y10T74/19781—Non-recirculating rolling elements
- Y10T74/19786—Captured sphere
Definitions
- the present invention relates to a rolling element screw device, and more particularly, to an improvement of a rolling element screw device of a type using a cage ring and having a mechanism for preventing deviation of the cage ring. Is.
- a plurality of rolling elements have been installed in a freely rollable state between a screw-side spiral groove provided on the outer peripheral surface of the screw member and a nut-side spiral groove provided on the inner peripheral surface of the nut member.
- rolling element screw devices configured to convert torque into thrust between the screw member and the nut member, or to convert thrust into torque.
- a cage ring for holding the rolling element is installed between the screw member and the nut member, and this cage ring is stabilized by aligning the rolling elements. There is something that realizes conversion of torque-thrust force.
- the cage ring rotates at the same speed as the theoretical revolution speed of the rolling element. It will move in the axial direction according to the rotational speed and the spiral groove lead.
- the cage ring has a property of being delayed by a predetermined amount with respect to the rotational phase of the nut member, and this is a well-known matter based on the theory of rotational operation of the cage ring in a general rolling bearing. is there.
- the rolling element does not roll purely and irregular slipping may occur, and accordingly, the rotational phase of the cage ring advances relative to the ideal, delay Will be.
- this advance / delay amount varies depending on the axial movement direction and movement amount of the nut member.
- stopper members such as a pin and a retaining ring are provided one by one at both ends of the nut member movement stroke range in order to restrict the axial movement range of the cage ring. Installation was done.
- Patent Document 1 As a means for solving the above problem, a technique described in Patent Document 1 below has been proposed. That is, in Patent Document 1 below, in the rolling element screw device of the type using a cage ring, the phenomenon that the cage ring is displaced in one axial direction is eliminated, and the above-mentioned problems existing in the prior art are solved. Techniques for doing so have been proposed. Specifically, the technique described in Patent Document 1 below is a ball screw device using a cage ring 104 as shown in FIG. 6, and is adjacent to the spiral groove 101a of the nut member 101.
- the planetary gear 109 moves in mesh with the internal teeth 107 or the external teeth 108 by installing the power transmission means having the above-described configuration in the ball screw device.
- the cage ring 104 maintains a constant relationship with the rotational phase of the rotation side member (i.e., the nut member 101 or the screw member 102), and the movement amount of the cage ring 104 in both the axial directions is always constant. It is said that you can keep on.
- Patent Document 1 Japanese Patent Application Laid-Open No. 2002-323108
- Patent Document 1 has various problems in design, and thus cannot be easily applied to all types of rolling element screw devices. And! Specifically, in the technique described in Patent Document 1, the inner teeth 107 and the outer teeth 108 that mesh with the planetary gear 109 are formed in the land portions adjacent to the spiral grooves 101a and 102a. Cutting teeth in the land portion in this way adversely affects the spiral grooves 101a and 102a that repeatedly receive rolling force and sliding load from the ball, and the rolling element screw device itself This will also lead to a decrease in the rigidity. This fact shows that the design restriction becomes large to provide power transmission means while maintaining rigidity, and the scope of application of the technique described in Patent Document 1 is very narrow! / , Rep
- the present invention has been made in view of the existence of the above-described problems, and its object is to drive torque when a cage ring as in the prior art comes into contact with a strobe member.
- the device rises, it is possible to avoid the phenomenon when it is applied, and there is less design constraint when applying it, and the configuration in which the amount of movement of the cage ring in both the axial directions can always be kept constant.
- the purpose is to provide a technology that can be realized at low cost and without impairing reliability.
- a rolling element screw device includes a screw member having a screw-side spiral groove formed on an outer peripheral surface, a nut member having a nut-side spiral groove formed on an inner peripheral surface, and the screw-side spiral groove.
- a plurality of rolling elements installed between the nut-side spiral groove so as to be freely rollable, and installed in an opposing annular space between the screw member and the nut member, and rolling the plurality of rolling elements at a predetermined position.
- a rolling element screw device comprising: a power transmission means that moves in an axial direction in accordance with a lead angle of the screw-side spiral groove and the nut-side spiral groove while rotating in a state maintaining a certain relationship.
- the power transmission means is the screw member.
- outer teeth are formed in another axial region of the screw-side spiral groove so as not to overlap with the screw-side spiral groove formed in the screw member
- the internal teeth are formed in another region in the axial direction of the nut-side spiral groove so as not to overlap with the nut-side spiral groove formed in the nut member.
- the screw member includes: a screw member main body portion in which the screw-side spiral groove is formed; and an external tooth forming portion in which the external teeth are formed.
- the nut member may be composed of a nut member main body portion in which the nut-side spiral groove is formed and an internal tooth forming portion in which the internal teeth are formed.
- the rolling element screw device includes the outer teeth, the inner teeth, and the planetary gears. It is preferable that the gear angle is formed so as to correspond to the lead angle of the screw side spiral groove and the nut side spiral groove.
- a central axis of the planetary gear may be arranged on a pitch circle of the plurality of rolling elements.
- the present invention it is possible to avoid the phenomenon that occurs when the driving torque increases when the retainer ring comes into contact with the stagger member, as in the prior art. It is possible to provide a rolling element screw device capable of always keeping constant the amount of restraining force and the amount of movement of the cage ring in both the axial directions. Further, according to the present invention, the rolling element screw device can be easily manufactured at low cost without impairing the reliability of the device.
- FIG. 1 is a perspective external perspective view for explaining an overall configuration of a rolling element screw device according to the present embodiment.
- FIG. 2 is an exploded perspective view for explaining the configuration of the rolling element screw device according to the present embodiment.
- FIG. 3 is an external perspective view for explaining a configuration of a cage ring according to the present embodiment.
- FIG. 4 is a view illustrating a preferred improved form of the screw member according to the present embodiment.
- FIG. 5 is a view illustrating a preferred improved form of the nut member according to the present embodiment.
- FIG. 6 is an expanded explanatory view showing a configuration of a conventional ball screw device described in Patent Document 1 cited.
- FIG. 1 is a perspective external perspective view for explaining the overall configuration of the rolling element screw device according to the present embodiment.
- FIG. 2 is an exploded perspective view for explaining the configuration of the rolling element screw device according to the present embodiment.
- the rolling element screw device includes a screw member 11 having a screw side spiral groove 1la formed on the outer peripheral surface, and a nut side spiral groove 12a on the inner peripheral surface.
- a ball 13 as a plurality of rolling elements that are rotatably disposed between the screw side spiral groove 1 la and the nut side spiral groove 12a, the screw member 11, and the nut member
- a cage ring 14 that is installed in a ring-shaped space opposite to 12 and holds the plurality of balls 13 at a predetermined position so that the balls 13 can roll freely. It is configured as a rolling element screw device having a finite stroke structure called a non-circulation type that is held by a ring 14 so that it can roll and is not circulated.
- the screw member 11 has a portion on one end side (lower left side in FIG. 1 and FIG. 2) as a simple shaft, to which a motor or the like as a drive source is connected, The member to become will be attached.
- the central portion following the shaft portion is a ball receiving portion in which the screw side spiral groove 11a is formed, and the outer end 17 is formed in the portion on the other end side that follows. have.
- the nut member 12 has a nut-side spiral groove 12a formed in a portion on one end side (the lower left side in FIG. 1 and FIG. 2) of the inner peripheral surface, and a portion on the other end side following that. It has a structure in which internal teeth 18 are formed. A member to be acted on is attached to the nut member 12 or a motor or the like serving as a drive source for rotating the nut member 12 is connected.
- the external teeth 17 are formed in different axial regions of the screw side spiral groove 11a so as not to overlap the screw side spiral groove 11a formed in the screw member 11. Also, it is formed in a separate region in the axial direction of the nut side spiral groove 12a so as not to overlap with the nut side spiral groove 12a formed in the nut member 12.
- the screw-side spiral groove 11a formed on the outer peripheral surface of the screw member 11 and the nut-side spiral groove 12a formed on the inner peripheral surface of the nut member 12 have the same lead angle. It is configured.
- the cage ring 1 4 and the nut member 12 are configured to have the number of teeth corresponding to the movement difference.
- the cage ring 14 is formed of resin in a cylindrical shape, and can hold the ball 13 in a freely rollable state at a plurality of locations on the cylindrical surface.
- FIG. 3 is an external perspective view for explaining the configuration of the cage ring according to the present embodiment.
- ball pockets 14 a each capable of holding one ball 13 are provided at a plurality of locations on the cylindrical surface of the cage ring 14. .
- the ball pocket 14a is formed so as to have a diameter slightly larger than the outer dimension of the ball 13, and a smooth rolling motion of the ball 13 in the ball pocket 14a is realized.
- the cage ring 14 is provided with a plurality (three in the present embodiment) of gear pockets 14b on the other end side (upper right side in FIG. 3).
- the gear pocket 14b is formed so as to penetrate inside and outside in the radial direction of the cage ring 14 so that it can accommodate the planetary gear 19 that is rotatably coupled between the outer teeth 17 and the inner teeth 18. ing.
- the planetary gear 19 is provided with small-diameter shaft portions 19a and 19a at both ends thereof (see FIG. 2), and has a structure that rotates around the small-diameter shaft portions 19a and 19a. .
- the planetary gear 19 has a central axis arranged in parallel with the center lines of the screw member 11 and the nut member 12, and is positioned on or near the pitch circle of the plurality of balls 13. Has been placed. With this configuration, the planetary gear 19 and the cage ring 14 spirally move at substantially the same speed as the ball 13, so that the ball 13 hardly interferes with the ball pocket 14 a of the cage ring 14.
- the gear pocket 14b is formed in a shape that substantially matches the shape of the planetary gear 19 as viewed from above, and the axial width of the wide portion at the circumferential intermediate position in the gear pocket 14b is It is set slightly larger than the length of the small-diameter shaft portions 19a, 19a of the planetary gear 19, and the axial width of the narrow portion at both ends in the circumferential direction of the gear pocket 14b is the thickness of the planetary gear 19. It is set sufficiently larger than the dimensions.
- the planetary gear 19 contacts the inner wall of the narrow portion of the gear pocket 14b. It is supposed not to.
- the diameter of the planetary gear 19 is set to be larger than the thickness of the cage ring 14, so that the planetary gear 19 protrudes radially inward and outward from the gear pocket 14b.
- the rolling element screw device includes the external teeth 17 formed on the screw member 11, the internal teeth 18 formed on the nut member 12, the external teeth 17 and the internal teeth.
- a plurality of (three in this embodiment) planetary gears 19 rotatably held at predetermined circumferential positions of the retainer ring 14 in a state of meshing with the teeth 18.
- the outer teeth 17, the inner teeth 18 and the planetary gear 19 constitute a power transmission means. Due to the action of the power transmission means, in the rolling element screw device according to the present embodiment, the cage ring 14 can always keep the amount of movement in both axial directions constant.
- the motor is connected to the shaft portion on one end side of the screw member 11 and the nut member 12 is connected to the object to be actuated in a state where the operation in the rotational direction is restricted.
- An explanation will be given by way of example.
- the cage ring 14 moves around the screw member 11 with a certain phase angle delayed with respect to the rotational phase of the screw member 11. While being rotated, it is moved in the axial direction according to the lead angle of the screw side spiral groove 11a and the nut side spiral groove 12a.
- the planetary gear 19 is engaged with the screw member 11 and the nut member 12, and the cage ring 14 is supported by the planetary gear 19, so that Even if the nut member 12 is repeatedly reciprocated in the axial direction, the rotational phase of the nut member 12 and the rotational phase of the cage ring 14 are always kept in a constant relationship, and the axial direction of the cage ring 14 The amount of movement to both is always constant. Therefore, in the process in which the nut member 12 reciprocates within a predetermined movement stroke range, the ball pocket 14a of the cage ring 14 is prevented from jumping out from the opposed annular space between the screw member 11 and the nut member 12.
- the bore between the screw side spiral groove 11a of the screw member 11 and the nut side spiral groove 12a of the nut member 12 is It will be possible to reliably prevent the phenomenon of popping out of Le 13.
- the external teeth 17 of the rolling element screw device do not overlap with the screw side spiral groove 1 la formed in the screw member 11! /
- the screw-side spiral groove 1 la is formed in another axial region, while the inner teeth 18 are arranged so as not to overlap with the nut-side spiral groove 12a formed in the nut member 12. It is possible to mention that it is formed in another area of direction.
- This configuration eliminates the disadvantages of the prior art and Patent Document 1 cited, and is formed at a place where the external teeth 17 and the internal teeth 18 do not affect the spiral groove that receives the load from the ball 13 at all. Therefore, the present invention with fewer design restrictions when the outer teeth 17 and the inner teeth 18 are provided can be applied to various types of rolling element screw devices.
- the external teeth 17 and the internal teeth 18 according to the present embodiment are the same as those of the technology described in the cited Patent Document 1. As described above, since it is not necessary to provide the land portion adjacent to the spiral groove, the processing is very easy. Thus, the manufacturing cost can be significantly reduced as compared with the technique described in Patent Document 1.
- the screw member 11 includes a screw member main body l ib in which a screw side spiral groove 11a is formed, and an external tooth. It is preferable that the outer member is formed by a combination of different members, i.e., an external tooth forming portion 11c on which the nut 17 is formed.
- the nut member 12 has a nut-side spiral groove 12a as illustrated in FIG.
- the nut member main body portion 12b to be formed and the internal tooth forming portion 12c in which the internal teeth 18 are formed are combined in another member.
- the nut-side spiral groove 12a needs to be formed on the inner peripheral surface of the nut member 12 where it is very difficult to perform processing. Cost reduction effect is demonstrated.
- the stroke amount can be set to a desired value by increasing or decreasing the range in which the outer teeth 17 and the inner teeth 18 are formed. ing. This is possible because the outer teeth 17 and the inner teeth 18 are formed so as not to overlap the screw side spiral groove 11a and the nut side spiral groove 12a. Since the stroke amount can be defined within an arbitrary range that does not affect the configuration of the place where the ball 13 is to be loaded, it is extremely suitable.
- the above-described advantage is that, in order to provide the planetary gear 109, the number of balls must be reduced.
- the rolling element screw device according to this embodiment makes it possible to install power transmission means while maintaining the rigidity of the device.
- the rolling element screw device can employ another rolling element such as a force roller that employs the ball 13 as a plurality of rolling elements.
- the number of installed planetary gears 19 is three. If the number of installed planetary gears 19 is plural, it is sufficient to install two or more rolling elements of the present invention. A screw device is realized.
- the cage ring 14 is made of resin has been described as an example, but it may be made of a metal material.
- the cage ring 14 in this case can be formed by making a metal plate into a cylindrical shape.
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- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
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Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN200780035712.5A CN101517270B (zh) | 2006-09-29 | 2007-09-05 | 转动体螺杆装置 |
US12/440,850 US7771307B2 (en) | 2006-09-29 | 2007-09-05 | Rolling element screw device |
DE112007002103T DE112007002103B4 (de) | 2006-09-29 | 2007-09-05 | Rollelement-Schraubspindelvorrichtung |
JP2008540910A JP4475679B2 (ja) | 2006-09-29 | 2007-09-05 | 転動体ねじ装置 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006-266291 | 2006-09-29 | ||
JP2006266291 | 2006-09-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2008050543A1 true WO2008050543A1 (fr) | 2008-05-02 |
Family
ID=39324353
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2007/067274 WO2008050543A1 (fr) | 2006-09-29 | 2007-09-05 | Dispositif à vis de corps de roulement |
Country Status (5)
Country | Link |
---|---|
US (1) | US7771307B2 (ja) |
JP (1) | JP4475679B2 (ja) |
CN (1) | CN101517270B (ja) |
DE (1) | DE112007002103B4 (ja) |
WO (1) | WO2008050543A1 (ja) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20090193915A1 (en) * | 2008-02-01 | 2009-08-06 | Feng-Ho Wang | Separable ball screw |
DE102009051123A1 (de) * | 2009-10-28 | 2011-05-12 | Schaeffler Technologies Gmbh & Co. Kg | Kugelgewindetrieb, insbesondere für eine Feststellbremse eines Kraftfahrzeuges |
DE102013208218B4 (de) * | 2013-05-06 | 2017-02-09 | Schaeffler Technologies AG & Co. KG | Kugelgewindetrieb |
CN103697131B (zh) * | 2014-01-03 | 2016-03-02 | 李国锋 | 一种滚珠丝杆 |
FR3026455B1 (fr) * | 2014-09-29 | 2016-10-14 | Skf Ab | Mecanisme de vis a rouleaux a couronnes integrees et procede de fabrication associe |
FR3026454B1 (fr) * | 2014-09-29 | 2016-11-25 | Skf Ab | Mecanisme de vis a rouleaux et procede de fabrication associe |
DE102015201257B3 (de) | 2015-01-26 | 2016-07-07 | Schaeffler Technologies AG & Co. KG | Kugelgewindetrieb und zugehöriger elektromechanischer Aktuator |
AU2015202820B1 (en) * | 2015-03-09 | 2015-09-24 | Nord-Lock Australia Pty Ltd | A high torque transmission |
US10527142B2 (en) | 2016-05-23 | 2020-01-07 | Parker-Hannifin Corporation | Hydraulic rotary ball screw actuator |
JP6772556B2 (ja) * | 2016-05-30 | 2020-10-21 | 株式会社ジェイテクト | ボールねじ装置およびステアリング装置 |
CN114019097B (zh) * | 2021-10-08 | 2023-08-04 | 利晟(杭州)科技有限公司 | 一种工业园区空气质量自动监测装置及系统 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002257165A (ja) * | 2001-02-28 | 2002-09-11 | Tokico Ltd | 電動ディスクブレーキ |
JP2002323108A (ja) * | 2001-04-24 | 2002-11-08 | Koyo Seiko Co Ltd | ボールねじ装置 |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2663994B1 (fr) * | 1990-06-29 | 1994-06-10 | Ratier Figeac Soc | Verin rotatif a billes. |
JP2005121184A (ja) * | 2003-10-20 | 2005-05-12 | Omron Healthcare Co Ltd | アクチュエータ |
-
2007
- 2007-09-05 JP JP2008540910A patent/JP4475679B2/ja active Active
- 2007-09-05 CN CN200780035712.5A patent/CN101517270B/zh active Active
- 2007-09-05 US US12/440,850 patent/US7771307B2/en active Active
- 2007-09-05 WO PCT/JP2007/067274 patent/WO2008050543A1/ja active Application Filing
- 2007-09-05 DE DE112007002103T patent/DE112007002103B4/de active Active
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002257165A (ja) * | 2001-02-28 | 2002-09-11 | Tokico Ltd | 電動ディスクブレーキ |
JP2002323108A (ja) * | 2001-04-24 | 2002-11-08 | Koyo Seiko Co Ltd | ボールねじ装置 |
Also Published As
Publication number | Publication date |
---|---|
US7771307B2 (en) | 2010-08-10 |
DE112007002103T5 (de) | 2009-08-06 |
JPWO2008050543A1 (ja) | 2010-02-25 |
CN101517270B (zh) | 2011-05-25 |
JP4475679B2 (ja) | 2010-06-09 |
US20090282940A1 (en) | 2009-11-19 |
DE112007002103B4 (de) | 2012-02-02 |
CN101517270A (zh) | 2009-08-26 |
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