DE4119819A1 - Linear guide with zero angular plane - has balls retained in grooves in inner part which has offset from slots in outer part - Google Patents

Linear guide with zero angular plane - has balls retained in grooves in inner part which has offset from slots in outer part

Info

Publication number
DE4119819A1
DE4119819A1 DE4119819A DE4119819A DE4119819A1 DE 4119819 A1 DE4119819 A1 DE 4119819A1 DE 4119819 A DE4119819 A DE 4119819A DE 4119819 A DE4119819 A DE 4119819A DE 4119819 A1 DE4119819 A1 DE 4119819A1
Authority
DE
Germany
Prior art keywords
grooves
openings
balls
shaft
longitudinal guide
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Withdrawn
Application number
DE4119819A
Other languages
German (de)
Inventor
Wolfgang Dipl Ing Steinberger
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.)
Schaeffler Technologies AG and Co KG
Original Assignee
Schaeffler Technologies AG and Co 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
Application filed by Schaeffler Technologies AG and Co KG filed Critical Schaeffler Technologies AG and Co KG
Priority to DE4119819A priority Critical patent/DE4119819A1/en
Publication of DE4119819A1 publication Critical patent/DE4119819A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C29/00Bearings for parts moving only linearly
    • F16C29/04Ball or roller bearings
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C29/00Bearings for parts moving only linearly
    • F16C29/12Arrangements for adjusting play
    • F16C29/123Arrangements for adjusting play using elastic means
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C3/00Shafts; Axles; Cranks; Eccentrics
    • F16C3/02Shafts; Axles
    • F16C3/03Shafts; Axles telescopic
    • F16C3/035Shafts; Axles telescopic with built-in bearings

Abstract

The guide which permits relative longitudinal movement between two parts (1, 2) is designed to prevent relative rotation between the two parts. The inner part (1) has longitudinal grooves (4, 5) which receive the balls (7). The outer part has slots (12) which receive the balls (7) which are retained by an elastically deformable sleeve (8). In order to eliminate any angular play between the inner (1) and outer (2) parts the slots (12) in the outer part are slightly offset relative to the grooves (4) in the inner part or the grooves are offset relative to the slots. USE/ADVANTAGE - Linear guide with zero angular play.

Description

The invention relates to the longitudinal guidance of two components relative to each other, the axial relative to each other adjustable but rotatable with each other, with an inner part designed as a shaft, in the Outer surface circumferentially distributed, parallel to the longitudinal axis extending grooves are arranged with a die Shaft enclosing outer part, which the grooves of the Wave opposite, to the wave and outward itself has opening openings, wherein in the grooves of Wave and the opposite breakthroughs of the Outer part balls are supported and the balls from the Projections protrude radially outwards and from one shared, radially elastic ring are.

From DE 32 06 437 C2 a joint is known that in addition the angling of the inner part and outer part against a longitudinal displacement. However, this is with play in the circumferential direction between the two components afflicted because the balls are in contact depending on the direction of rotation changes and no defined position of the balls in the Grooves or the breakthroughs is given.

Longitudinal guides for selector shafts for gear change transmissions with several in a cage and in grooves from Ball and outer part guided balls are from DE 40 20 160 A1 known.

The invention has for its object a longitudinal guide  to create a relative adjustment between a Shaft and an outer part allowed, but in the both directions of rotation a play-free take between these two components.

This object is achieved in that at least one of the grooves or at least one of the Breakthroughs with a circumferential offset to the neighboring ones Grooves or breakthroughs is arranged by the The circumferential offset of the others differs from one another.

Due to the circumferential offset or the different Pitch spacing results in a play-free connection, so that use of the longitudinal guide, for example with shift shafts, such as those found in manual transmissions can be used. In the event that a Torque transmission between the shaft and the outer part is only required in one direction of rotation, it is off sufficient if one of the grooves or one of the through breaks to the others.

In an embodiment of the invention, however, it is possible The longitudinal guide should be designed so that the same torque is load ratios in both possible rotation or Swivel directions result in what is provided that two There are groups of grooves or openings, the grooves of which each have the same circumference offset, but the two different groups below have different pitches.

Perfect rolling conditions of the balls without sliding arise when the length of the breakthroughs, that of elastic ring and the grooves of the desired Displacement are adjusted. For use cases which the displacement or smoothness between the shaft and the outer part is not in the foreground,  it may also be enough if the breakthroughs that the bullets record, are shorter than the desired adjustment length of the two components to each other and the displacement path only in the length of the grooves of the shaft is taken into account.

The running grooves are preferably circular in cross section shaped. Due to the different dimensioning the distribution distances automatically arises clocks between the balls and the grooves a that the adjacent grooves associated balls opposite flanks of the grooves to the system com to achieve game suppression. The one with it associated further advantage relates to the possibility provide for coarser tolerances during production, which is due to the elastic behavior of the ring in the mon balanced state.

There are two alternative designs for the breakthroughs possible. According to a first embodiment is pre see that the breakthroughs, seen in cross section, Have side faces that are parallel to that of the center point of the balls containing between them Radial plane run.

However, it is also possible that the breakthroughs, in the cross seen cut a side surface that is parallel to the the center of the associated radial containing the sphere plane runs and a side surface that acts as a circular arc is designed to have.

The advantage of this training is that the pressure angle that results in a favorable introduction of force Torque transmission allowed.  

The elastic ring is preferably fixed to the outer part connected. He can, for example, by friction on the Be held outer surface of the outer part.

It is also possible to add several balls per groove see who are kept in a cage.

Preferred embodiments of the invention are in the Drawing shown schematically.

It shows

Fig. 1 shows a cross section through a first Execute ungsform,

Fig. 2 is a longitudinal section of FIG. 1,

Fig. 3 shows a cross section through a second Execute ungsform,

Fig. 4 shows a longitudinal section through an embodiment with several balls per groove and

Fig. 5 shows a cross section through the outer part of the embodiment of FIG. 4 with offset Druchbrüchen.

In the longitudinal guide according to FIGS. 1 to 3, the shaft 1 is received axially displaceably with play in the bore 3 of an outer member 2. The shaft 1 has in its outer surface parallel to the longitudinal axis or axis of rotation X extending grooves 4 , 5 . The grooves form groups. The path center planes B 1 of the grooves 4 forming the first group are offset from one another by 180 °. This also applies to the center plane B 2 of the two grooves 5 belonging to the second group.

However, the path center planes B 1 of the grooves 4 to each other (B 2 ) of the grooves 5 are arranged with one another at different pitch intervals. Thus, starting from the groove 4 located above in the drawing figure 1 to the groove 5 following the clockwise rotation, there is a pitch C which is smaller than the pitch to the groove 5 following the counterclockwise rotation. The same then applies in the further sequence, so that between two neighboring disclosed first and second grooves 4 , 5 times a larger pitch D and a smaller pitch C is given. In the grooves 4 , 5 balls 7 aufgenom men who are guided in openings 6 of the outer part 2 in the circumferential direction on side surfaces 11 , 12 openings 6 . The openings 6 are also open to the outside. They are acted upon radially inward by a resilient ring 9 seated firmly on the outer surface 8 of the outer part 2 . Since the breakthroughs 6 are arranged at the same pitch, due to the different pitches of the first and second grooves 4 , 5 , there is a contact ratio to one another, which guarantees freedom from play in the two directions of rotation A, B of the shaft 1 and the outer part 2 accomplishes. Thus, for example, with respect to the first grooves 4, there are contact conditions in which the balls 7 each lie against the contact points 13 on the flank of the grooves 4 lying at the front in the direction of rotation A 1. Further support is provided via the contact point 14 on the side face 11 the opening 6 of the outer part 2 and via the contact point 15 on the inner surface 10 of the elastic ring 9th In the case of the second grooves 5 , the ball 7 rests with respect to the groove on the flank opposite to the first groove 4 , namely the front in the direction of rotation A, with the contact point 13 . The breakthrough is supported at contact point 14 on the opposite side surface 12 . Due to the elastic prestressing via the elastic ring 9 , the balls are inevitably adjusted to the running groove 4 or 5 and to the corresponding side surface 11 , 12 of the associated opening 6 . Depending on the Spielver ratios and the individual tolerance ratios of a single groove, the ball 7 is more or less high to the edge of the web that results between the groove and the outer surface of the shaft.

The contact points 13 , 14 , 15 are selected so that perfect rolling conditions occur in the grooves 4 , 5 adapted to the displacement length and in the correspondingly long openings 6 . This ensures smooth operation. Depending on the switching or rotational direction A or A 1 of the shaft 1 opposite the outer part 2 , half of the balls 7 each take part in the torque transmission in the illustrated embodiment.

In the embodiment of Fig. 1, the sides extending surfaces 11, 12 of the apertures 6 to the radial plane parallel RE, which runs 12 guided balls 7 through the center points between the side surfaces 11. In the embodiment according Fig. 3, the side surfaces are formed under different. Thus, the side surface 12 is designed accordingly to the side surface 12 in the embodiment according to FIG. 1, namely as a parallel to the radial plane RE, while the other side surface 11 runs in a circular arc. This results in more favorable conditions with respect to the transmission of torque, so that higher moments can be transmitted in one direction than in the other direction of rotation.

In the embodiment of FIGS. 4 and 5 it can be seen that two balls 7 are arranged side by side in each breakthrough 6, which are held by a cage 16 . Furthermore, 5 of Fig. Seen that the openings 6 of the outer member 2 with different distances division C, D are arranged. The grooves 4 , 5 are evenly distributed (with the same spacing to each other) in the shaft 1 . The arrangement of the openings 6 with different pitch C, D follows the teaching as described in connection with FIGS. 1 to 3 for the grooves 4 , 5 . In all embodiments, the grooves 4 , 5 are designed in cross section as a circular arc.

Claims (8)

1.Longitudinal guidance of two components opposite one another, which are axially relatively adjustable relative to one another, but can be rotated relative to one another, with an inner part designed as a shaft, in the outer surface of which circumferentially distributed running grooves extending parallel to the longitudinal axis are arranged, with an outer part surrounding the shaft, the opposite the grooves of the shaft, to the shaft and outwardly opening openings, wherein balls are supported in the grooves of the shaft and the respective opposite openings of the outer part and the balls protrude radially outwards from the openings and from a common, radially elastic ring are acted on, characterized in that at least one of the grooves ( 4 , 5 ) or at least one of the openings ( 6 ) is arranged with a circumferential offset (C, D) to the adjacent grooves ( 5 , 4 ) or openings ( 6 ), that of the circumferential offset the other n deviates from each other.
2. Longitudinal guide according to claim 1, characterized in that two groups of grooves ( 4 , 5 ) or through openings ( 6 ) are present, the grooves of which each have the same circumferential offset but the two different groups have different spacings (C, D) from one another .
3. Longitudinal guide according to claim 1, characterized in that the length of the openings ( 6 ) and that of the elastic ring ( 9 ) is adapted to the displacement length.
4. Longitudinal guide according to claim 1, characterized in that the grooves ( 4 , 5 ) are circular in cross-section.
5. Longitudinal guide according to claim 1, characterized in that the openings ( 6 ), viewed in cross section, have side surfaces ( 11 , 12 ) which are parallel to the radial plane (RE) containing the center (M) of the balls ( 7 ) guided between them (RE) ) run.
6. Longitudinal guide according to claim 1, characterized in that the openings ( 6 ), seen in cross section, a side surface ( 12 ) which runs parallel to the radial plane (RE) containing the center point (M) of the associated ball ( 7 ) and a Side surface ( 11 ), which is designed as a circular arc.
7. Longitudinal guide according to claim 1, characterized in that the elastic ring ( 9 ) is fixedly connected to the outer part ( 2 ).
8. Longitudinal guide according to claim 1, characterized in that there are several balls ( 7 ) for each groove ( 4 , 5 ), which are held in a cage ( 16 ).
DE4119819A 1991-06-15 1991-06-15 Linear guide with zero angular plane - has balls retained in grooves in inner part which has offset from slots in outer part Withdrawn DE4119819A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE4119819A DE4119819A1 (en) 1991-06-15 1991-06-15 Linear guide with zero angular plane - has balls retained in grooves in inner part which has offset from slots in outer part

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE4119819A DE4119819A1 (en) 1991-06-15 1991-06-15 Linear guide with zero angular plane - has balls retained in grooves in inner part which has offset from slots in outer part

Publications (1)

Publication Number Publication Date
DE4119819A1 true DE4119819A1 (en) 1992-12-17

Family

ID=6434049

Family Applications (1)

Application Number Title Priority Date Filing Date
DE4119819A Withdrawn DE4119819A1 (en) 1991-06-15 1991-06-15 Linear guide with zero angular plane - has balls retained in grooves in inner part which has offset from slots in outer part

Country Status (1)

Country Link
DE (1) DE4119819A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19933875A1 (en) * 1999-07-22 2001-02-01 Schaeffler Waelzlager Ohg Linear roller bearings for transmitting torques
US6350203B1 (en) 1999-11-18 2002-02-26 Ina Walzlager Schaeffler Ohg Torque-transmitting linear rolling bearing
DE10053988A1 (en) * 2000-10-31 2002-05-08 Ina Schaeffler Kg Arrangement of bearings for shaft incorporates housing, linear ball-bearings, sleeve, with end rims, ball-tracks, gear shift shaft in gear housing.
DE10301082A1 (en) * 2003-01-14 2004-07-29 Timken Gmbh Rolling bearing for linear movements has guide rods fitted coaxially to each other and tracks for roll bodies between guide rods and a guide sleeve
DE10224875B4 (en) * 2001-06-07 2014-12-18 Magna Powertrain Bad Homburg GmbH Shaft-hub connection

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7005413U (en) * 1969-02-26 1971-10-28 Peugeot Universal joint coupling.
GB1274216A (en) * 1968-10-10 1972-05-17 Rotax Ltd Ball splines
GB1340644A (en) * 1971-12-10 1973-12-12 Glaenzer Spicer Sa Sliding joint
DE2904905A1 (en) * 1979-02-09 1980-08-21 Krauss Maffei Ag homo-kinetic or universal shaft end coupling - has spring loaded or hydraulic link giving circumferential force between coupling halves
DE3206437C2 (en) * 1982-02-23 1984-06-07 Uni-Cardan Ag, 5200 Siegburg, De
EP0189011A2 (en) * 1985-01-22 1986-07-30 Affärsverket FFV Telescopic guide, especially for transmittance of torque
DE4020160A1 (en) * 1989-06-29 1991-01-03 Zahnradfabrik Friedrichshafen Gear shift for vehicle gearbox - consists of shaft on gear housing, with guide grooves, and selector arm and balls
DE3940488A1 (en) * 1989-12-07 1991-06-13 Schaeffler Waelzlager Kg Guide for balls in telescopic drive shafts - has outer and inner shaft sections with opposite facing tracks and spacer springs

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1274216A (en) * 1968-10-10 1972-05-17 Rotax Ltd Ball splines
DE7005413U (en) * 1969-02-26 1971-10-28 Peugeot Universal joint coupling.
GB1340644A (en) * 1971-12-10 1973-12-12 Glaenzer Spicer Sa Sliding joint
DE2904905A1 (en) * 1979-02-09 1980-08-21 Krauss Maffei Ag homo-kinetic or universal shaft end coupling - has spring loaded or hydraulic link giving circumferential force between coupling halves
DE3206437C2 (en) * 1982-02-23 1984-06-07 Uni-Cardan Ag, 5200 Siegburg, De
EP0189011A2 (en) * 1985-01-22 1986-07-30 Affärsverket FFV Telescopic guide, especially for transmittance of torque
DE4020160A1 (en) * 1989-06-29 1991-01-03 Zahnradfabrik Friedrichshafen Gear shift for vehicle gearbox - consists of shaft on gear housing, with guide grooves, and selector arm and balls
DE3940488A1 (en) * 1989-12-07 1991-06-13 Schaeffler Waelzlager Kg Guide for balls in telescopic drive shafts - has outer and inner shaft sections with opposite facing tracks and spacer springs

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DE-Z: HIELSCHER, Gerhard: Präzision-Kugelführung -Anwendung im Bereich der Wälzlager. In: Werkstatt und Betrieb 104, 1971, 11, S.845-848 *

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19933875A1 (en) * 1999-07-22 2001-02-01 Schaeffler Waelzlager Ohg Linear roller bearings for transmitting torques
DE19933875B4 (en) * 1999-07-22 2014-10-16 Schaeffler Technologies Gmbh & Co. Kg Linear roller bearing for transmitting torques
EP1070865A3 (en) * 1999-07-22 2003-03-26 INA-Schaeffler KG Linear rolling bearing for the transmission of torques
US6350203B1 (en) 1999-11-18 2002-02-26 Ina Walzlager Schaeffler Ohg Torque-transmitting linear rolling bearing
DE10053988A1 (en) * 2000-10-31 2002-05-08 Ina Schaeffler Kg Arrangement of bearings for shaft incorporates housing, linear ball-bearings, sleeve, with end rims, ball-tracks, gear shift shaft in gear housing.
DE10224875B4 (en) * 2001-06-07 2014-12-18 Magna Powertrain Bad Homburg GmbH Shaft-hub connection
DE10301082A1 (en) * 2003-01-14 2004-07-29 Timken Gmbh Rolling bearing for linear movements has guide rods fitted coaxially to each other and tracks for roll bodies between guide rods and a guide sleeve
US6942386B2 (en) 2003-01-14 2005-09-13 Timken Gmbh Roller bearing for linear movements
DE10301082B4 (en) * 2003-01-14 2007-02-01 Timken Gmbh Rolling bearings for linear movements

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Legal Events

Date Code Title Description
OM8 Search report available as to paragraph 43 lit. 1 sentence 1 patent law
8139 Disposal/non-payment of the annual fee