WO1993006387A1 - Vis a billes - Google Patents

Vis a billes Download PDF

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Publication number
WO1993006387A1
WO1993006387A1 PCT/EP1992/001977 EP9201977W WO9306387A1 WO 1993006387 A1 WO1993006387 A1 WO 1993006387A1 EP 9201977 W EP9201977 W EP 9201977W WO 9306387 A1 WO9306387 A1 WO 9306387A1
Authority
WO
WIPO (PCT)
Prior art keywords
ball screw
screw drive
spindle
nut
drive according
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.)
Ceased
Application number
PCT/EP1992/001977
Other languages
German (de)
English (en)
Inventor
Joachim Schneider
Hans-Reinhard Lambertz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
INA Waelzlager Schaeffler OHG
Original Assignee
INA Waelzlager Schaeffler OHG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by INA Waelzlager Schaeffler OHG filed Critical INA Waelzlager Schaeffler OHG
Publication of WO1993006387A1 publication Critical patent/WO1993006387A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • F16H25/2214—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members with balls with elements for guiding the circulating balls
    • F16H25/2223—Cross over deflectors between adjacent thread turns, e.g. S-form deflectors connecting neighbouring threads

Definitions

  • the invention relates to a ball screw drive with a spindle which has a thread-like gear in its outer surface, a nut which has a gear matching the gear of the spindle, which extends over less than an incline of the gear, and the ends of which are interconnected by a transfer channel are connected, which extends across the profile between two windings of the gear of the spindle, and with balls which are received in the gear of the nut and engage in the gear of the spindle.
  • Such a ball screw is known from DE-PS 21 49 392.
  • the thread-like passage of the mother is worked directly into the nut body.
  • the transfer duct is part of a separate insert piece which is inserted into an opening in the nut body.
  • Such training is expensive because it is designed for use in precision machine tools, in measuring and testing technology and the like.
  • the invention has for its object to provide a ball screw drive which is particularly inexpensive to manufacture and is suitable for applications which do not require particularly large load capacities or special precision, but in which ease of movement is desired.
  • the gear ar mother part of a thin-walled, non-cutting manufactured is molded part, the ends of which open into the transfer channel firmly connected thereto, and that the molded part is received with the transfer channel in a nut body.
  • the advantage of this design is that no machining is required for the production of the shaped part representing the thread-like track for the balls and the transfer channel.
  • the non-cutting production results in significant cost advantages.
  • Only the molded part and the connecting duct connected to it need to be made of a material, for example sheet steel, which has the required strength properties for the transmission of the adjusting forces.
  • the reshaping and the connection between the ends of the thread and the transfer duct achieve a strength that meets the requirements for the force absorption, without deformations occurring which impair the smooth operation.
  • the nut body can be made from inexpensive material, for example plastic.
  • Areas of application for ball screw drives according to the invention can, because of the inexpensive design, be those areas which were previously reserved for simple screw drives with a threaded spindle and threaded nut. In this case, however, smooth operation is achieved, which leads to a substantial reduction in the drive power compared to the aforementioned spindle drives.
  • Actuators which have to be inexpensive and in which the ease of movement has a particularly favorable effect due to the reduced power requirement, are in particular in demand for the valve actuation and in the motor vehicle sector, for example for seat adjustment or the like.
  • the transfer duct is formed in one piece with the molded part representing the aisle.
  • the starting point for the deformation can be, for example, a piece of pipe.
  • the transfer duct it is also possible for the transfer duct to be connected in a form-fitting or material-locking manner to the molded part having the aisle.
  • This makes it possible to manufacture the transfer channel separately or to start from a band, which is then wound into the appropriate shape and bent over, so that both the shape of the transfer channel and that of the aisle are formed, the ends being shaped - Or cohesively connected.
  • a dovetail connection can be considered as a positive connection, and a welding process can be provided, for example, as a material connection.
  • the transfer channel tunnel-shaped can either be designed as a sheet metal part itself and then connected to the molded part having the aisle, or it can be part of a raw part which comprises both the aisle and the transfer duct.
  • a particularly favorable and simple shape is achieved in that the molded part, which contains the passage, is designed as a sheet metal sleeve and two tabs forming the transfer channel are punched out of the wall of the molded part and radially inward toward the spindle are bent and these overlap a profile of the aisle of the spindle in a saddle shape, and that the aisles are round thread-like with round transitions, seen in longitudinal section, on the outside or inside and on the core diameter.
  • the nut body is preferably designed as a plastic part, in particular as a plastic injection molded part.
  • the molded part with the transfer channel is inserted into the injection mold and overmolded.
  • the molded part with the transfer duct is thus molded into the nut bodies.
  • the advantage of this design is that the nut body made of plastic is particularly suitable for damping noises.
  • a particularly smooth running and uncomplicated transfer of the balls into the transfer channel and vice versa results when the profile of the thread-like threads of the nut and spindle, as seen in longitudinal section, is rounded.
  • a design similar to a round thread can be used.
  • a sleeve for better force absorption and assembly, it is proposed in a further embodiment to receive the nut body in a sleeve, in particular a sheet metal sleeve.
  • FIG. 1 shows a section along section line A-A through the ball screw drive according to FIG. 2,
  • FIG. 2 shows a side view of FIG. 1,
  • FIG. 3 shows a section B-B as a detail of the design of the transfer channel
  • FIG. 4 shows an illustration of an alternative molded part with a transfer channel to the sleeve construction according to FIG. 1, as a single part,
  • FIG. 5 shows a longitudinal section through a ball screw drive with a molded part according to FIG. 4,
  • FIG. 6 shows a blank from which the molded part shown in FIG. 4 is produced
  • Figure 7 shows an arrangement with two nut bodies.
  • a spindle 1 is provided which is provided in its outer surface with a thread-like gear 2. It is a single thread. It can be seen that the gear 2 is rounded on the outside diameter and on the core diameter like a round thread.
  • the spindle 1 includes a nut 3 which coaxially surrounds the threaded spindle 1.
  • the nut 3 comprises a molded part 5, which contains a gear 4, which has a winding, which is designed to correspond to the gear 2 of the spindle 1.
  • the molded part 5 is designed as a sheet metal sleeve, in which the passage 4 is molded without cutting. The thin-walled molded part 5 is cut to form the transfer channel 6.
  • the incision results in two tabs 8 which form the side surfaces for the transfer duct 6.
  • the two tabs 8 overlap the profile 11 of the gear 2 of the spindle 1 between two turns.
  • the saddle-shaped overlap is achieved by the inner contour 21 of the tab 8, which is adapted to the profile 11.
  • the nut 3 comprises the nut body 7, in which the molded part 5 is received with the transfer channel 6.
  • the nut body 7 is produced in particular as an injection molded part, the molded part 5 with the transfer channel 6 being inserted into the injection mold during the manufacturing process. So there is an overmolding.
  • the nut body 7 can be surrounded by a sleeve 12.
  • the ends of the transfer channel 6 can be designed such that there is a smooth transition to the flanks of two adjacent turns of the passage 2 of the spindle 1. For this purpose, it is provided that the transfer duct 6 widens towards the ends. This can be done so that the side surfaces or tabs 8 tangentially approach the course of the flanks.
  • FIGS. FIG. 4 shows the molded part 5 with the transfer channel 6. It can be seen that, with regard to the molded part 5, it is a shell-shaped band, the inner contour of which corresponds to the contour of the balls 13 rolling therein.
  • the running contour can be designed corresponding to that of a deep groove ball bearing.
  • two-point contact through the curvature 20 comes into question.
  • the two ends 15, 16 of the molded part 5 forming the aisle 4 can be used to connect a tunnel-like transfer duct 6, which is also produced, for example, as a separate molded part. Its ends are connected to the two ends 15, 16, for example by welding.
  • the tunnel wall 17 of the transfer duct 6 is not fully closed, but has a slot 18.
  • the wall 17 for forming the transfer channel is bent into the shape designed as a tunnel shape of the transfer channel, while in the remaining band area the curvature 20 for the passage 4, which is spherical in shape, is considerably adapted, pressed in or rolled up. This is then rolled up into a helix and the other end of the band is connected to the free area of the transfer channel 6.
  • the broken line of the end 15 is used to show that the section forming the wall 17 of the transfer duct 6 can also be separated from the raw part area which has the pure passage and is later connected to it.
  • the assembly comprising the transfer duct 6 and the molded part 5 comprising the aisle 4 is received with the outer surface 19 in an injection molding tool and molded into the nut body 7.
  • FIG. 7 shows an arrangement in which two nut bodies 7 are accommodated in a joint sleeve 12.
  • the sleeve 12 has resilient tongues 22 in abutment on opposite end faces of the nut body 7.
  • the other two end faces of the mutually braced nut bodies 7 are supported on rims 14 of the sleeve.
  • the sleeve 12 is designed as a sheet metal sleeve.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transmission Devices (AREA)

Abstract

La présente invention se rapporte à une vis à billes, dans laquelle sont disposées des billes (13) entre le filet (2) de la broche (1) et le filet (4) de l'écrou (3). Le filet (4) de l'écrou (3) s'étend approximativement sur un pas et donc une spire. Les deux extrémités du filet (4) sont reliées entre elles par un canal de transfert (6). Le filet (4) est constitué d'une pièce (5) en forme de douille en fer-blanc dans laquelle sont découpées à la matrice des languettes (8), lesquelles sont repliées vers l'intérieur et constituent les faces latérales pour le canal de transfert (6). La pièce en fer-blanc (5) est moulée dans le corps d'écrou (7) réalisé en plastique et moulé par injection. Cela permet d'obtenir une vis à billes particulièrement bon marché et à vissage facile. En cas d'arrondissage des filets (2) et (4) de l'écrou (3) et de la broche (1) sur le diamètre de l'âme et sur le diamètre intérieur ou extérieur, il en résulte des transitions favorables pour le transfert des billes vers les extrémités du filet (4) ou vers le canal de transfert (6).
PCT/EP1992/001977 1991-09-21 1992-08-27 Vis a billes Ceased WO1993006387A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19914131486 DE4131486C2 (de) 1991-09-21 1991-09-21 Kugelgewindetrieb
DEP4131486.7 1991-09-21

Publications (1)

Publication Number Publication Date
WO1993006387A1 true WO1993006387A1 (fr) 1993-04-01

Family

ID=6441170

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1992/001977 Ceased WO1993006387A1 (fr) 1991-09-21 1992-08-27 Vis a billes

Country Status (2)

Country Link
DE (1) DE4131486C2 (fr)
WO (1) WO1993006387A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2307020A (en) * 1995-11-10 1997-05-14 Thomson Ibl Ltd Re-circulating ballscrew and nut device
WO2003006848A1 (fr) * 2001-07-13 2003-01-23 Societe Industrielle De Sonceboz S.A. Dispositif vis-ecrou a billes

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5388475A (en) * 1993-09-15 1995-02-14 Beaver Precision Products Ball nut and method of manufacturing same
JP3325679B2 (ja) * 1993-12-10 2002-09-17 日本精工株式会社 ボールねじのボール溝形状
DE19646339A1 (de) 1996-11-09 1998-05-14 Schaeffler Waelzlager Ohg Vorrichtung zur Umwandlung einer Drehbewegung in eine Axialbewegung
DE19652181A1 (de) * 1996-12-14 1998-06-18 Schaeffler Waelzlager Ohg Vorrichtung zur Umwandlung einer Drehbewegung in eine geradlinige Bewegung
DE19944875A1 (de) * 1999-09-18 2001-03-22 Schaeffler Waelzlager Ohg Kugelgewindetrieb
DE19953378A1 (de) * 1999-11-06 2001-05-10 Schaeffler Waelzlager Ohg Gewindetrieb mit einer Spindel und einer Mutter
DE19960938A1 (de) * 1999-12-17 2001-06-21 Schaeffler Waelzlager Ohg Kugelgewindetrieb
WO2001044689A1 (fr) 1999-12-17 2001-06-21 Ina-Schaeffler Kg Vis d'entrainement a billes
TW435626U (en) * 2000-09-01 2001-05-16 Hiwin Tech Corp A ball nut of ball screw
DE10214481A1 (de) * 2002-03-30 2003-10-16 Ina Schaeffler Kg Kugelgewindetrieb mit Umlenkstück
TWI221512B (en) 2002-04-15 2004-10-01 Smc Corp Ball screw mechanism
DE10236281A1 (de) 2002-08-08 2004-02-19 Ina-Schaeffler Kg Verfahren zum Herstellen einer Spindelmutter eines Kugelgewindetriebes
DE10243020A1 (de) 2002-09-17 2004-03-25 Ina-Schaeffler Kg Kugelgewindetrieb und Verfahren zum Herstellen einer Spindelmutter, insbesondere eines Kugelgewindetriebes
DE10320948B4 (de) * 2003-05-09 2016-11-10 Schaeffler Technologies AG & Co. KG Kugelgewindetrieb
DE102014218405B3 (de) * 2014-09-15 2015-11-05 Schaeffler Technologies AG & Co. KG Verfahren zur Herstellung einer Spindel für einen Kugelgewindetrieb, sowie eine danach hergestellte Spindel
DE102014221135B3 (de) * 2014-10-17 2016-01-07 Schaeffler Technologies AG & Co. KG Kugelgewindemutter
DE102020132816B4 (de) 2020-12-09 2024-02-01 Schaeffler Technologies AG & Co. KG Gewindemutter eines Kugelgewindetriebes
DE102020132817A1 (de) 2020-12-09 2022-06-09 Schaeffler Technologies AG & Co. KG Gewindemutter eines Kugelgewindetriebes

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB873508A (en) * 1956-08-14 1961-07-26 Ass Elect Ind Improvements in and relating to screw and nut mechanisms of the recirculating ball type
US3009367A (en) * 1960-09-15 1961-11-21 Lewis G Striggow Ball nut cartridge
GB891025A (en) * 1957-07-17 1962-03-07 Cam Gears Ltd Improvements in screw and nut mechanism
EP0132492A1 (fr) * 1983-06-29 1985-02-13 Neff Gewindespindeln GmbH Transmission à vis et écrou à billes
GB2144515A (en) * 1983-08-02 1985-03-06 Roltra Spa Screw and nut mechanism of the recirculating ball type

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3393577A (en) * 1966-06-29 1968-07-23 Scully Jones Company Pre-loaded ball screw assembly
FR2149859A5 (fr) * 1971-08-16 1973-03-30 Skf Ind Trading & Dev
DE2149392B1 (de) * 1971-10-04 1973-03-29 Wilke Richard Kugelgewindespindelmutter mit wenigstens einem einzelueberlauf-einsatzstueck
IT1116777B (it) * 1977-07-07 1986-02-10 Roltra Spa Accoppiamento di trasmissione a vite madrevite

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB873508A (en) * 1956-08-14 1961-07-26 Ass Elect Ind Improvements in and relating to screw and nut mechanisms of the recirculating ball type
GB891025A (en) * 1957-07-17 1962-03-07 Cam Gears Ltd Improvements in screw and nut mechanism
US3009367A (en) * 1960-09-15 1961-11-21 Lewis G Striggow Ball nut cartridge
EP0132492A1 (fr) * 1983-06-29 1985-02-13 Neff Gewindespindeln GmbH Transmission à vis et écrou à billes
GB2144515A (en) * 1983-08-02 1985-03-06 Roltra Spa Screw and nut mechanism of the recirculating ball type

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2307020A (en) * 1995-11-10 1997-05-14 Thomson Ibl Ltd Re-circulating ballscrew and nut device
GB2307020B (en) * 1995-11-10 1999-12-08 Thomson Ibl Ltd Re-circulating ballscrew and nut device
WO2003006848A1 (fr) * 2001-07-13 2003-01-23 Societe Industrielle De Sonceboz S.A. Dispositif vis-ecrou a billes

Also Published As

Publication number Publication date
DE4131486A1 (de) 1993-03-25
DE4131486C2 (de) 1999-10-21

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