WO1992022753A1 - Unite de recirculation de billes pour guides lineaires - Google Patents

Unite de recirculation de billes pour guides lineaires Download PDF

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Publication number
WO1992022753A1
WO1992022753A1 PCT/EP1992/001059 EP9201059W WO9222753A1 WO 1992022753 A1 WO1992022753 A1 WO 1992022753A1 EP 9201059 W EP9201059 W EP 9201059W WO 9222753 A1 WO9222753 A1 WO 9222753A1
Authority
WO
WIPO (PCT)
Prior art keywords
ball unit
segments
unit according
cage
recirculating ball
Prior art date
Application number
PCT/EP1992/001059
Other languages
German (de)
English (en)
Inventor
Jürgen RABE
Original Assignee
Ina Wälzlager Schaeffler Kg
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
Priority claimed from DE19914119135 external-priority patent/DE4119135A1/de
Priority claimed from DE19924202746 external-priority patent/DE4202746A1/de
Application filed by Ina Wälzlager Schaeffler Kg filed Critical Ina Wälzlager Schaeffler Kg
Publication of WO1992022753A1 publication Critical patent/WO1992022753A1/fr

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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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C29/00—Bearings for parts moving only linearly
    • F16C29/04—Ball or roller bearings
    • F16C29/06—Ball or roller bearings in which the rolling bodies circulate partly without carrying load
    • F16C29/068—Ball or roller bearings in which the rolling bodies circulate partly without carrying load with the bearing body fully encircling the guide rail or track
    • F16C29/0683—Ball or roller bearings in which the rolling bodies circulate partly without carrying load with the bearing body fully encircling the guide rail or track the bearing body encircles a rail or rod of circular cross-section, i.e. the linear bearing is not suited to transmit torque
    • F16C29/0685—Ball or roller bearings in which the rolling bodies circulate partly without carrying load with the bearing body fully encircling the guide rail or track the bearing body encircles a rail or rod of circular cross-section, i.e. the linear bearing is not suited to transmit torque with balls
    • F16C29/0688—Ball or roller bearings in which the rolling bodies circulate partly without carrying load with the bearing body fully encircling the guide rail or track the bearing body encircles a rail or rod of circular cross-section, i.e. the linear bearing is not suited to transmit torque with balls whereby a sleeve surrounds the circulating balls and thicker part of the sleeve form the load bearing tracks

Definitions

  • the invention relates to a recirculating ball unit for linear guides, with a roller bearing cage, which consists of a plurality of segments arranged one behind the other in the circumferential direction, each having at least one supporting zone and a return zone for the rolling elements designed as balls, and with head pieces adjoining the two end faces of the segments , which contain deflection zones for the balls, each connecting a support zone with a return zone.
  • a roller bearing cage which consists of a plurality of segments arranged one behind the other in the circumferential direction, each having at least one supporting zone and a return zone for the rolling elements designed as balls, and with head pieces adjoining the two end faces of the segments , which contain deflection zones for the balls, each connecting a support zone with a return zone.
  • a recirculating ball unit with such a roller bearing cage is known from DE-OS 3937781, in which the individual cage segments made of a polymeric material can be demolded axially after their production in the injection molding process. Due to the extremely high undercuts in the return zone, a radial removal of a one-piece cage consisting of such components would not be possible in terms of production technology.
  • the head pieces containing the deflection zones also have a complicated geometry.
  • this cage thus contains, for example, four further individual components which are extremely difficult to assemble and which have to be connected to one another, for example, by ultrasonic welding.
  • a tight fit of this cage in the surrounding metal sleeve of the recirculating ball unit can only be achieved by additional components, such as cover disks.
  • the parts forming the cage must have bores running parallel to the longitudinal axis, into which continuous centering rods are inserted, which axially align the cage parts with respect to one another and with respect to the metal sleeve fix.
  • a one-piece roller bearing cage is known from DE-AS 1262691, but its manufacture is complicated and, when implemented as a component made of polymeric material, cannot be produced in one device without radial slide tools.
  • the invention has for its object to provide a simply constructed roller bearing cage of the type mentioned, which is easy to manufacture, a device without radial slide tools should be applicable for its execution as a castable or sprayable component.
  • a connecting board is arranged between two adjacent segments of the roller bearing cage, all segments and connecting boards being connected to one another to form an integral component.
  • a one-piece segment part of the cage no longer needs to be specially assembled, and complex connection methods, such as ultrasonic welding, are also not required.
  • the connecting rims can be designed and arranged in such a way that the one-piece segment part has sufficient elasticity to enable assembly in the metallic bearing sleeve of the recirculating ball unit.
  • the connecting rims can adjoin these in the regions of the end faces of the segments.
  • Successive connecting shelves can alternately be adjacent to one end face and the other end face.
  • Such mutually arranged connecting shelves guarantee a firm and effective locking in the metal sleeve of the recirculating ball unit due to their end faces and facilitate the reduction of the outer diameter for the assembly process.
  • the inner diameter of the connecting ribs preferably corresponds to the outer diameter of the segments. If the connecting shelves are sufficiently elastic, the entire one-piece segment part of the cage becomes very elastic and enables good assembly. When the segment part is pushed into the metal sleeve, the outer diameter is then Knife of the cage reduced until the end faces of the connecting rims can snap into the side of the metal sleeve facing away from the insertion side.
  • the connecting rims therefore preferably have abutment surfaces for axial contact with the bearing sleeve.
  • the length of the connecting shelves in the circumferential direction is preferably greater than the distance between the adjacent segments that bridges a support zone and a return zone. This length is variable and depends on the required strength of the connection between the connecting board and the segments. However, it must not be less than the sum of the widths of the supporting zone and the return zone.
  • the end cap and the head piece can be designed as individual components, which have to be manufactured separately and assembled individually on the bearing bush and the cage inserted therein.
  • the component formed by the end cap and the head piece can have a radial groove which is open to the inside and into which a sealing ring made of a polymeric material is inserted.
  • a sealing ring in one piece on such a component, which results in a further reduction in manufacturing costs and in assembly and storage costs if the bearing is to be provided with a seal.
  • the end cap, the head piece and the sealing ring can optionally also be formed from different polymeric materials, for example from a maximum of three material components, to form a one-piece component.
  • the advantages which can be achieved with the invention consist in the following: geometrically small individual parts of the cage segment part only result in low tool costs, the number of injection molding tools required being reduced.
  • the one-piece construction of the segment part simplifies the assembly of the entire cage, since the segments no longer need to be attached to one another. There are therefore no additional operations required for ultrasonic welding. Therefore, plastics that cannot be ultrasonically welded can also be processed.
  • the cage is non-detachably fixed in a simple manner in the bearing sleeve of the recirculating ball unit.
  • FIG. 1 shows a partial axial section through a recirculating ball unit arranged on a guide rail
  • FIG. 2 shows a development of the segment part of the cage of FIG. 1.
  • FIG. 3 shows a partial axial section through a recirculating ball unit arranged on a guide rail
  • FIG. 4 shows an axial partial section through a further recirculating ball unit arranged on a guide rail.
  • a recirculating ball unit On a guide rail 1 with a circular cross section, a recirculating ball unit is arranged to be displaceable in the longitudinal direction, which contains a cage 2 and a bearing sleeve 3, in which the cage 2 is inserted axially and fixed therein.
  • the bearing sleeve 3 made of metallic material is closed on its end faces with end caps 4 to such an extent that only those for attaching the ball bushing to the Guide rail 1 required hole remains free.
  • the cage 2 consists of a segment part 5 and of two head pieces 6 lying against the end of the segment part. These cage parts are made of a polymeric material.
  • a plurality of segments 7 arranged one behind the other in the circumferential direction with support zones 8 and return zones 9 for the rolling elements of the ball recirculating unit designed as balls are already formed into a one-piece component during their manufacture in that a connecting board 10 is arranged between each two adjacent segments 7, which also consists of the Material of the segments and is in one piece with them.
  • the length L of the connecting board 10 must be greater than the distance A between two adjacent segments 7 in the circumferential direction. This distance also contains the sum of the widths of the support zone 8 and the return zone 9, so it is at least as large as the sum of these widths.
  • the axial dimension of the connecting rims 10 is also variable.
  • the connecting rims 10 adjoin the segments 7 on the outer peripheral surface.
  • the outer diameter D of the segment part 5 thus corresponds to the diameter _ on which the connecting rims 10 are arranged with their inner sides.
  • connecting rims 10 which are arranged one behind the other in the initial direction are arranged alternately on one end face 11 of the segment part and on the other end face 12. This results in a good fastening of the segment part 5 in the bearing sleeve 3, because the connecting rims each abut with their inner end faces 13 against the end faces of the bearing sleeve 3, on which they are snapped there when the segment part 5 is inserted into the bearing sleeve 3.
  • the head pieces adjoin so that their deflection zones each connect a support zone 8 and a return zone 9 for the balls.
  • the bearing sleeve 3 made of metallic material at its end faces with end caps 14, 15 closed so far that only the hole required for attaching the ball bushing to the guide rail 1 remains free.
  • the cage 2 consists of a plurality of segments 16 arranged one behind the other in the circumferential direction, each of which contains a support zone and a return zone for the rolling bodies of the ball recirculating unit or ball bushing designed as balls. Annular head pieces 17, 18 rest on the end faces of the cage.
  • the end cap 14, 15 and the associated head piece 17, 18 are now produced on one end of the cage as a one-piece component made of a poly material.
  • an annular groove 19 which is open to the inside, that is to say to the guide rail 1, and into which a sealing ring 20 made of a polymeric material is inserted is incorporated into the component formed from the end cap 14 and the head piece 17.
  • the exemplary embodiment according to FIG. 4 has no such groove, here a sealing ring 21 is provided, which together with the end cap 15 and the head piece 18 forms a one-piece component made of a polymeric material. If a ball bushing is to be sealed with the aid of a sealing ring, then the embodiment according to FIG. 4 has the advantage of further reducing the manufacturing and assembly costs.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bearings For Parts Moving Linearly (AREA)

Abstract

Une unité de recirculation de billes pour guides linéaires comprend une cage de palier à roulement formée de plusieurs segments successifs (7) qui comprennent chacun une zone de support (8) et une zone de retour (9) des corps de roulement en forme de bille, ainsi que des pièces de tête adjacentes aux deux faces frontales (11, 12) des segments (7), qui contiennent des zones de déviation des billes qui relient chacune une zone de support (8) à une zone de retour (9). Une plaque de liaison (10) est située entre les deux segments adjacents (7) de chaque paire de segments. Tous les segments (7) et toutes les plaques de liaison (10) forment ensemble un seul composant en une seule pièce.
PCT/EP1992/001059 1991-06-11 1992-05-14 Unite de recirculation de billes pour guides lineaires WO1992022753A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19914119135 DE4119135A1 (de) 1991-06-11 1991-06-11 Waelzlagerkaefig fuer eine kugelumlaufeinheit
DEP4119135.8 1991-06-11
DE19924202746 DE4202746A1 (de) 1992-01-31 1992-01-31 Kugelumlaufeinheit fuer linearfuehrungen
DEP4202746.2 1992-01-31

Publications (1)

Publication Number Publication Date
WO1992022753A1 true WO1992022753A1 (fr) 1992-12-23

Family

ID=25904410

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1992/001059 WO1992022753A1 (fr) 1991-06-11 1992-05-14 Unite de recirculation de billes pour guides lineaires

Country Status (1)

Country Link
WO (1) WO1992022753A1 (fr)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1575608A1 (de) * 1966-05-14 1970-01-15 Skf Kugellagerfabriken Gmbh Waelzlager fuer Laengsbewegungen
FR2273190A1 (fr) * 1974-06-01 1975-12-26 Skf Ind Trading & Dev
FR2381204A1 (fr) * 1977-02-19 1978-09-15 Skf Kugellagerfabriken Gmbh Douille a billes
FR2390626A1 (fr) * 1977-05-11 1978-12-08 Skf Kugellagerfabriken Gmbh Palier a roulements pour mouvements relatifs lineaires sur un arbre de machine
FR2393187A1 (fr) * 1977-06-04 1978-12-29 Skf Kugellagerfabriken Gmbh Douille a billes
EP0001609A1 (fr) * 1977-10-20 1979-05-02 Skf Kugellagerfabriken Gmbh Procédé pour la réalisation d'un palier à billes muni d'une cage disposée dans une bague extérieure ainsi que cage pour la mise en oeuvre du procédé
FR2502712A1 (fr) * 1981-03-26 1982-10-01 Schmid Sro Kugellager Fourreau coulissant a billes
FR2581140A1 (fr) * 1985-04-30 1986-10-31 Teramachi Hiroshi Palier pour mouvement lineaire axial

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1575608A1 (de) * 1966-05-14 1970-01-15 Skf Kugellagerfabriken Gmbh Waelzlager fuer Laengsbewegungen
FR2273190A1 (fr) * 1974-06-01 1975-12-26 Skf Ind Trading & Dev
FR2381204A1 (fr) * 1977-02-19 1978-09-15 Skf Kugellagerfabriken Gmbh Douille a billes
FR2390626A1 (fr) * 1977-05-11 1978-12-08 Skf Kugellagerfabriken Gmbh Palier a roulements pour mouvements relatifs lineaires sur un arbre de machine
FR2393187A1 (fr) * 1977-06-04 1978-12-29 Skf Kugellagerfabriken Gmbh Douille a billes
EP0001609A1 (fr) * 1977-10-20 1979-05-02 Skf Kugellagerfabriken Gmbh Procédé pour la réalisation d'un palier à billes muni d'une cage disposée dans une bague extérieure ainsi que cage pour la mise en oeuvre du procédé
FR2502712A1 (fr) * 1981-03-26 1982-10-01 Schmid Sro Kugellager Fourreau coulissant a billes
FR2581140A1 (fr) * 1985-04-30 1986-10-31 Teramachi Hiroshi Palier pour mouvement lineaire axial

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