DE4400718C2 - Bearings for a longitudinal and rotary movement - Google Patents

Bearings for a longitudinal and rotary movement

Info

Publication number
DE4400718C2
DE4400718C2 DE4400718A DE4400718A DE4400718C2 DE 4400718 C2 DE4400718 C2 DE 4400718C2 DE 4400718 A DE4400718 A DE 4400718A DE 4400718 A DE4400718 A DE 4400718A DE 4400718 C2 DE4400718 C2 DE 4400718C2
Authority
DE
Germany
Prior art keywords
cage
bearing
guided
longitudinal
rotary movement
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.)
Expired - Fee Related
Application number
DE4400718A
Other languages
German (de)
Other versions
DE4400718A1 (en
Inventor
Herbert Zettner
Leo Muentnich
Roland Sarrach
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 DE4400718A priority Critical patent/DE4400718C2/en
Publication of DE4400718A1 publication Critical patent/DE4400718A1/en
Application granted granted Critical
Publication of DE4400718C2 publication Critical patent/DE4400718C2/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • F16C31/00Bearings for parts which both rotate and move linearly
    • F16C31/04Ball 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
    • F16C25/00Bearings for exclusively rotary movement adjustable for wear or play
    • F16C25/06Ball or roller bearings
    • F16C25/08Ball or roller bearings self-adjusting
    • 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
    • F16C33/00Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30Parts of ball or roller bearings
    • F16C33/38Ball cages
    • F16C33/3837Massive or moulded cages having cage pockets surrounding the balls, e.g. machined window cages
    • F16C33/3843Massive or moulded cages having cage pockets surrounding the balls, e.g. machined window cages formed as one-piece cages, i.e. monoblock cages
    • 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
    • F16C33/00Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30Parts of ball or roller bearings
    • F16C33/38Ball cages
    • F16C33/40Ball cages for multiple rows of balls
    • 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
    • F16C19/00Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/04Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly
    • F16C19/08Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with two or more rows of balls

Description

The invention relates to a bearing for a longitudinal and rotary movement, in which a Inner part via rolling elements guided in a cylindrical cage in a Boh tion of an outer part is guided.

Such bearings are already known and are used for the longitudinal guides of rods with a circular cross section, for example in vehicle transmissions used for the storage of switching shafts. In particular, it can vertical installation of the control shaft that the bearing cage through Shocks or vibrations from a desired central position to one undesired end position moves, which ultimately leads to the fact that when changing the selector position the selector shaft cannot roll on the rolling elements, but must slide over it, which is an increased friction with it brings.

DE 18 88 455 U1 describes a ball bearing for longitudinal movements which consists of a number of balls which are guided in a cage and are accommodated between a shaft and a smooth cylindrical bore in a running sleeve. In order to prevent the cage from moving into an undesired end position, it is preloaded against the ball raceway. Referring to FIGS. 5 and 6, this is achieved in that the cage is provided at one point on its circumference with a continuous axially extending slot so that it presses itself under resilient tension at the bearing balls and presses against the outer race. The disadvantage of this technical variant is that the preload of the cage may not be sufficient.

Now preloaded roller bearing cages are already in a variety of ways known tours. For example, in DE 19 32 924 U1 there is a cage described, in which parts resiliently rest against a raceway, d. H. of the Cage is elastic. A cage is previously known from US 51 65 805, which elastically presses the rolling elements against a raceway in the radial direction.

This is done by a spring element arranged in the slot area. A The older application DE 42 22 185 A1 shows a similar solution. The opening takes place there Expansion of the cage by a leaf spring. From US 44 62 643 an arrangement known in which partially separated segments in the area a bag with an elastic, resilient position towards an outside are partially shown. Finally, from DE 25 25 104 C2 are different Profile depths of web parts of a cage are known. All of the above However, clearances relate to rolling bearings, which only use rotary movements To run.

It is therefore an object of the invention the cage for a bearing for a longitudinal and Develop rotary motion so that its bias is sufficient.

According to the invention the object is achieved in that the cage at least in a circumferential section resiliently from the circular shape has cage curvature.

This ensures that at least one of the rolling elements between the Raceway of the outer part and the raceway of the inner part radially elastic is preloaded and thus prevents axial rolling of the roller bearing cage.

A particularly favorable variant of this cage according to the invention is in the An Proposition 2 suggested. In this case the cage is said to be an ellipse or as be a polygon. A cage in the shape of an ellipse can be made with simple Manufacture molds and clamps at two opposite points of the Cages the rolling elements in a radially elastic manner. In the formation of the roller bearing figs as a polygon is achieved that the rolling elements radial in several places are elastically biased.

It is also possible according to claim 3 that the pitch circle diameter or Inner bracket diameter of the cage slightly larger than its nominal diameter are knives. When inserting the cage with rolling elements into the The outer part is drilled due to its slight oversize pressed together and thus elastically biased in the circumferential direction. Thereby the inner brackets of the cage also put on the rolling elements and press them onto the raceway in the outer part, d. H. an unintended wan the cage is avoided.

In a development of the invention according to independent claim 4 is before seen that at least one web of the cage over at least part of it axial length in the radial direction an elastically curved outward Area.  

Due to the elastically curved area of the web of the Cage is achieved that the inner or the outer envelope circle through knife of the rolling elements located there is enlarged so that this are radially elastically biased. Conveniently one is in In this case, however, proceed in such a way that two webs lying next to each other have an elastically curved area.

The same radial elastic preload is used after the independent Claim 5 also achieved when little of a board of the cage least a segment in the area of a pocket is separated, so that this is only connected on one side to another board of the cage and elastic at a certain angle towards the outside part is employed.

The rolling element or elements located in this pocket become resilient pressed against the raceway of the outer part and thus radially elastic biased, with the one lying on the punched-out end of the pocket Rolling element or rolling element part has the greatest prestress.

In a development of the invention according to independent claim 6 this radial elastic preload is achieved even when little Mostly, the bars of a bag only on one side of a board of the cage are connected so that they are at a certain angle are resiliently employed in the direction of the outer part. Also in In this case, the rolling element in question or will affect the rolling element resiliently against the through these punched-out webs Pressed outer raceway.

According to a further feature of the invention according to the independent Claim 7 are the opposite end faces of the Cage by a connected or non-connected spring element be kept under tension.

The two end faces of the rolling bearing cage are through the in the slot area integrated spring pushed away from each other in the circumferential direction, so that the roller bearing cage within wide limits of the spring applied is elastically biased in the circumferential direction. In this way  the rolling bearing cage with the help of the spring element according to the invention braced and with a relatively large spring force radially outwards pressed so that it bears against the rolling elements and this against the Outer race of the outer part presses. In this way it becomes unreal desired migration of the roller bearing cage prevented in the axial direction.

Finally, according to another feature of the invention Claim 8 through the opposite end faces of the cage Predetermined breaking points are connected to each other.

In connection with the shape accuracy in the production of rolling storage such cages with predetermined breaking points regain importance tion, because in particular their stability and their lack of offset in radial and axial direction make work easier. By the target the roller bearing cage according to the invention can be broken as a handle closed cage, which is overall dimensionally stable for handling, Transport and assembly is.

Finally, according to an additional feature of the inven tion according to independent claim 9 at least the webs of a bag of the cage is radial over at least part of its axial length Have profile depth that is smaller than the profile depth of the rest Webs is. Due to this reduced profile depth of the webs one or The enveloping circle of the rolling elements located therein becomes several pockets enlarged, so that the bearing he prestresses at these points holds.

The invention is explained in more detail using the following exemplary embodiments tert. Show it:

Fig. 1 shows a section of a switching mechanism in a gearbox,

Fig. 2 is a side view of a bearing according to the invention, partly in section,

Fig. 3 shows a cross section through a bearing according to the line III-III in Fig. 2,

Fig. 4 shows a detail of a plan view of a cage,

Fig. 5 shows a cross section through an inventive bearing, the cage has a shape deviating from a circular shape buckle,

Fig. 6 shows a longitudinal section through an inventive bearing, the cage has at least two adjacent ridges having a portion of its axial length in the radial direction of a curved region,

Fig. 7 is a longitudinal section through an inventive bearing, the cage has a pocket, which is linked on one side only,

Fig. 8 is a cross section along the line VIII-VIII in Fig. 7,

Fig. 9 is a longitudinal section through an inventive bearing, the cage has at least two webs, which are only on one side connected to a board,

Fig. 10 shows a cross section through a bearing along the line XX in Fig. 9 and

Figure a section of a cross section of a bearing OF INVENTION to the invention, the cage has. 11 a pocket, the webs of which have a radial tread depth that is less than the profile depth of the remaining webs.

To illustrate the overall context, reference is first made to FIG. 1.

In a gearbox housing 24 of a manual transmission, a selector shaft 1 is arranged in bearings in the axial direction, that is to say displaceable along the axis 25 and pivotable in the circumferential direction about the axis 25 . The selector shaft 1 has one or more shift elements 26 which engage in a shift fork 27 for moving the same. In order to secure the individual positions of the selector shaft 1 , this or the switching element 26 is provided with a latching recess 28 into which a latching ball 29 of a ball latch 30 engages.

In FIGS. 2 and 3, a bearing is shown, in which a shaft 1 according to Fig. 1 and is guided longitudinally drehverschieblich. Bearing balls 10 are guided in a roller bearing cage 5 , which roll on the one hand on a raceway 13 of the shaft 1 and on the other hand on a raceway 12 of a bearing outer ring 2 . The bearing outer ring 2 is machined without cutting and provided at both ends with radially inwardly directed rims 3 and 4 . The bearing balls 10 are accommodated in pockets 9 , which are arranged evenly distributed around the circumference of the cylindrical cage 5 and each receive four bearing balls 10 .

The roller bearing cage 5 is made of an elastic material and has one axially extending incision 6 and 7 at one point on its circumference, starting from both end faces. The two axially extending incisions 6 and 7 delimit a connecting element 8 which connects the two ends of the roller bearing cage 5 to one another.

This connecting element 8 shows a resilient effect, so that the cage 5 is stretched in particular in the circumferential direction and the Lagerku gels 10 come to rest against the raceway 12 of the outer ring 2 , that is, the bearing preloaded. However, this requires a design of the Ta 9 such that the distance between the two guide surfaces 11 narrows in the radial direction inwards, so that the rolling elements 10 can not fall out when the shaft 1 is removed.

From Fig. 4 it can be seen that the cage 5 is provided at one end with a recess 16 into which two jumps 17 engage in the assembled state. During the assembly process, the two ends of the cage 5 are connected to one another by predetermined breaking points 15 .

On one side of the cage 5 , a Y-shaped spring 14 is net angeord, the unspecified legs rest on the end face of the other end of the cage 5 and thus ensure a corresponding preload of the bearing.

The bearing of the shaft 1 shown in cross section in FIG. 5 has a cage 5 which has a shape deviating from the circular shape on two peripheral sections, that is to say the cage 5 is designed as an ellipse. This deviating from the circular shape is resilient in the radial direction and ensures that, according to the large semiaxis length a of the ellipse, the bearing balls 10 abut on both main disks 18 of the cage 5 on the raceway 12 of the outer ring 2 and thus preload the bearing.

The longitudinal section shown in Fig. 6 in turn shows that the shaft 1 is guided longitudinally and rotatably via bearing balls 10 in the outer ring 2 . The cage 5 consists of annular rims 19 and 20 which are connected to one another evenly distributed around the circumference by webs 21 forming pockets 9 . At least two adjacent webs of a pocket 9 of the cage 5 are provided in the middle with an area 22 which is elastically curved outwards, so that the middle of the bearing balls 10 has a larger enveloping circle diameter than the one adjacent to it and thus for contact with the raceway 12 of the bearing outer ring 2 comes, that is, the middle bearing ball 10 biases the bearing. Appropriately, several pockets are evenly distributed around the circumference with webs which have an elastically curved area in the radial direction in order to achieve a uniform preload of the bearing.

The bearing of the shaft 1 shown in FIGS. 7 and 8 shows a cage 5 which has a pocket 9 which is only connected to the board 20 on one side. On the opposite side, a segment 23 of the board 19 is separated from this by two unspecified joints, so that the entire pocket 9 , which is bordered by two webs 21 , part of the board 20 and the separated segment 23 of the board 19 be , at a certain angle resiliently in Rich direction of the outer ring 2 is employed. As can be seen in particular from FIG. 7, the bearing is preloaded by contacting the right bearing ball 10 with the raceway 12 of the outer ring 2 .

In contrast to FIGS. 7 and 8 with a one-sided tied complete pocket 9 , FIGS. 9 and 10 show two webs 21 , which are tied only to the board 20 . As can be seen in particular from FIG. 9, both webs 21 are exempted behind the board 19 by a parting line, not designated, so that they are employed at a certain angle in the direction of the outer ring 2 . In this case, too, the bearing is preloaded by the right bearing ball 10 bearing against the raceway 12 of the bearing outer ring 2 .

In the bearing shown in FIG. 11, the preload is set by a different profile depth P R or P R1 of the webs 21 . The vast majority of the webs 21 of the cage 5 have a profile depth P R , to which the guide surfaces 11 are assigned. At least one pocket 9 of the cage 5 is designed with webs 21 , the profile depth P R1 of which is smaller than the profile depth P R of the other webs. This shortened profile depth P R1 in turn results in a guide surface 11.1 , which has an increased distance from the center of the bearing, so that the rolling elements 10 located in this pocket have a larger outer circumferential diameter than the other rolling elements 10 , that is to say in contact with the raceway 12 of the outer ring 2 stand and thus achieve the desired preload.

However, the invention is not based on the embodiment described above examples limited. So it also falls under the ideas of the invention, if, for example, one or more webs or pockets under one certain angle resilient not in the direction of the outer part, but towards the inner part or alternately towards the Outer part and inner part are employed.

Reference list

1 wave
2 outer ring
3 board
4 board
5 cages
6 incision
7 incision
8 connecting element
9 pocket
10 rolling elements
11 guide surface
11.1 Guide area
12 careers
13 careers
14 spring
15 predetermined breaking point
16 recess
17 head start
18 main parting
19 board
20 board
21 bridge
22 domed area
23 segment
24 gear housing
25 axis
26 switching element
27 shift fork
28 notch
29 locking ball
30 ball catch

Claims (9)

1. Bearing for a longitudinal and rotary movement, in which an inner part ( 1 ) is guided in a cylindrical cage ( 5 ) guided rolling elements ( 10 ) in a bore of an outer part ( 2 ), characterized in that the cage ( 5 ) at least in one circumferential section has an elastically resilient cage curvature that deviates from the circular shape ( FIG. 5).
2. Bearing for a longitudinal and rotary movement according to claim 1, characterized in that the cage ( 5 ) is designed as an ellipse or polygon ( Fig. 5).
3. Bearing for a longitudinal and rotary movement, in which an inner part ( 1 ) is guided in a cylindrical cage ( 5 ) guided rolling elements ( 10 ) in a bore of an outer part ( 2 ), characterized in that the pitch circle diameter or the inner bracket diameter of the cage ( 5 ) is slightly larger than its nominal diameter.
4. Bearing for a longitudinal and rotary movement, in which an inner part ( 1 ) is guided in a cylindrical cage ( 5 ) guided rolling elements ( 10 ) in a bore of an outer part ( 2 ), characterized in that at least one web ( 21st ) of the cage ( 5 ) over at least part of its axial length in the radial direction has an elastically curved area ( 22 ) ( Fig. 6).
5. Bearing for a longitudinal and rotary movement, in which an inner part ( 1 ) via 'in a cylindrical cage ( 5 ) guided rolling elements ( 10 ) in a bore of an outer part ( 2 ), characterized in that a board ( 19 ) of the cage ( 5 ) at least one segment ( 23 ) in the region of a pocket ( 9 ) is separated so that it is only connected on one side to another board ( 20 ) of the cage ( 5 ) and is elastic at a certain angle resilient in Rich direction of the outer part ( 2 ) is employed ( Fig. 7 and 8).
6. Bearing for a longitudinal and rotary movement, in which an inner part ( 1 ) is guided in a cylindrical cage ( 5 ) guided rolling elements ( 10 ) in a bore, an outer part ( 2 ), characterized in that at least the webs ( 21 ) a pocket ( 9 ) on one side only on a board ( 20 ) of the cage ( 5 ) are so that they are resiliently employed at a certain angle in the direction of the outer part ( 2 ) ( FIGS. 9 and 10).
7. Bearing for a longitudinal and rotary movement, in which an inner part ( 1 ) is guided in a cylindrical cage ( 5 ) guided rolling elements ( 10 ) in a bore of an outer part ( 2 ), the cage ( 5 ) at one point its circumference has an axially extending slot formed by opposing end faces, characterized in that the opposing end faces of the cage ( 5 ) are held under tension by a connected or non-attached spring element ( 8 , 14 ) ( Fig. 2 , 3 and 4).
8. Bearing for a rotary and longitudinal movement according to claim 7, characterized in that the opposite end faces of the cage ( 5 ) are connected to each other by predetermined breaking points ( 15 ) ( Fig. 4).
9. Bearing for a longitudinal and rotary movement, in which an inner part ( 1 ) is guided in a cylindrical cage ( 5 ) guided rolling elements ( 10 ) in a bore of an outer part ( 2 ), characterized in that at least the webs ( 21 ) a pocket ( 9 ) of the cage ( 5 ) over at least part of its axial length have a radial profile depth P R1 that is smaller than the profile depth P R of the other webs ( 21 ) ( FIG. 11).
DE4400718A 1994-01-13 1994-01-13 Bearings for a longitudinal and rotary movement Expired - Fee Related DE4400718C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE4400718A DE4400718C2 (en) 1994-01-13 1994-01-13 Bearings for a longitudinal and rotary movement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE4400718A DE4400718C2 (en) 1994-01-13 1994-01-13 Bearings for a longitudinal and rotary movement

Publications (2)

Publication Number Publication Date
DE4400718A1 DE4400718A1 (en) 1995-07-20
DE4400718C2 true DE4400718C2 (en) 1998-04-09

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Family Applications (1)

Application Number Title Priority Date Filing Date
DE4400718A Expired - Fee Related DE4400718C2 (en) 1994-01-13 1994-01-13 Bearings for a longitudinal and rotary movement

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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.

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Publication number Priority date Publication date Assignee Title
DE19539251C2 (en) * 1995-10-21 2003-08-21 Ina Schaeffler Kg Rolling bearing unit for rotary and longitudinal movements
DE19654089A1 (en) * 1996-12-23 1998-06-25 Teves Gmbh Alfred Deep groove ball bearing
KR101521378B1 (en) 2011-10-17 2015-05-18 닛뽄 세이꼬 가부시기가이샤 Radial roller bearing retainer
EP2610508A1 (en) * 2011-12-28 2013-07-03 Siemens Aktiengesellschaft Rolling element bearing
ITBO20130532A1 (en) * 2013-09-27 2015-03-28 Alfredo Coccagna maintenance unit.

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DE1932924A1 (en) * 1968-07-11 1970-06-25 Gen Electric Surge arresters with Kuehlvorrichtung
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