DE10327641B4 - Segment bearing for the radial and axial mounting of a slide member to a guide member - Google Patents

Abstract

segment camp for the radial and axial mounting of a slide member (1) on a Guide part (2), wherein the slide part (1) over Rolling elements (3) at the guide part (2) guided is that run on races (4) of the carriage or guide part (1,2), wherein the slide part (1) over at least two facing each other Doppelwälzkörperreihen (5) on the guide section (2) is mounted and the rows of rolling elements (5) each formed in the manner of an angular contact ball bearing, characterized in that the drainage area the raceway (4) is designed as a circular arc groove, wherein the raceway groove radius slight is larger as the radius of the spherical Rolling elements (3), So that the Running rings (4) under the pressure of the rolling elements (3) to adjust the To twist a career.

Description

The The invention relates to a segment bearing for radial and axial bearing a slide part on a guide part, wherein the slide part via rolling elements on guide part guided is that run on races of the carriage or guide part, wherein the slide part over at least two facing each other Doppelwälzkörperreihen at the guide part is stored and the rows of rolling elements each in the manner of an angular contact ball bearing are formed.

Such segment bearings are for example from the DE 38 17 694 C2 as well as in various designs and configurations known from practice. You will find application for the realization of circular segment lifting movements.

The Basic principle is based on a circular curved linear guide, in which between leadership part and slide off the rollers or rolling elements. Here are the Rollers mounted in the carriage part or the rolling elements in a Wälzkörperumlaufsystem accommodated, which u.a. the slide part forms and in the Wälzkörperumlaufbahn the Guide part curvature (circular arc) is adapted.

Another such camp is from the DE 1 966 974 U known, however, has no races.

Of the Invention is based on the object, a segment bearing of the above so-called type so that even under alternating load from any direction always a light and smooth running is ensured with low sliding resistance.

These The object is achieved according to the invention in that the drainage surface of the Raceway is designed as a circular arc groove, wherein the raceway groove radius slight is larger as the radius of the spherical Rolling elements, so that the Running rings under the pressure of the rolling elements for Twisting adjustment of the career.

Of the The advantage achieved by the invention consists essentially in that this Segment storage from all spatial Directions loadable, especially for recording changing Loads is particularly suitable, while a lighter and steady flow of the slide part on the guide part is ensured with low sliding resistance.

In Preferred embodiment of the invention are in this case the guide member and the slide part designed circular arc.

advantageously, Here are the two rows of rolling elements designed mirror images of each other.

Then can in a further advantageous embodiment, the radially outer races in the axial direction either adjacent to each other (O-arrangement) or mutually spaced (X-arrangement) may be arranged. In the O-arrangement then arises a broad support base, So a particularly good stiffness, while in X-arrangement because the smaller support base good elasticity Moment load is achieved.

Further is proposed in the context of the invention as an advantageous development, that the races are formed as race segments, the loose in raceway recordings of the carriage part and / or the guide part are inserted. this makes possible a self-aligning rolling contact geometry, whereby a uniform rolling and lowest differential slip of the rolling elements is achieved.

Around for the Running rings a limitation against displacement in the axial direction To achieve, it is recommended that at the two ends of the guide part end stop elements for the race segments are provided with the blind hole recordings for the Ends of the race segments are provided.

Basically, the Rolling elements of each row of rolling elements in a separate cage segment be arranged. In the context of the invention, however, there is also the Possibility, that the Rolling elements of the two rows of rolling elements in a common cage segment are arranged.

Also Here it is advantageous if at the two ends of the slide part end stop pieces for the cage segments are provided so that their Adjustment limited, in particular an exit from the guide part is excluded.

Either for the Assembly as well as the adjustment, it is expedient if the slide part and / or the leadership part radially in two segment halves divided, their mutual distance to the setting of the bearing clearance or the bias is adjustable.

Around always ensuring the axial alignment of the segment halves, should the two segment halves advantageously by means of a centering seat coaxial with each other be aligned.

Also it is also recommended that the two segment halves - in adjusted Position - non-positively with each other are connected.

in the The following is the invention to the exemplary embodiments illustrated in the drawing explained in more detail; it demonstrate:

1 a view of the segment bearing according to the invention,

2 a cross section through the object after 1 .

3 a view in the direction of X to 1 .

4 a detailed representation of the bearing in O arrangement,

5 a detailed representation of the bearing in X-arrangement,

6 a detailed view of a rolling element of the bearing

The segment bearing shown in the drawing serves for the radial and axial mounting of a slide member 1 on a guide part 2 , The sledge part 1 is about rolling elements 3 at the guide part 2 guided, which are designed as balls. The rolling elements 3 run on races 4 off, on the carriage or guide part 1 . 2 are provided.

In detail, the slide part 1 over at least two opposing Doppelwälzkörperreihen 5 at the guide part 2 stored, wherein the rows of rolling elements 5 are each formed in the manner of an angular contact ball bearing.

As can be seen in particular from the 4 and 5 can be seen, are the two rows of rolling elements 5 designed mirror images of each other. In this case, the radially outer races 4 either adjacent to each other in the axial direction, ie in the in 4 reproduced O-arrangement, or mutually spaced in X-arrangement ( 5 ) can be arranged. The segment roller bearing thus forms a double-row angular contact bearing in O- or X-arrangement, whose rolling bearing row spacing extends in the axial direction of the segment bearing. In the O arrangement ( 4 ) show the pressure cones formed by the pressure lines with their tips to the outside. The resulting support base (pressure cone distance) is larger than in an X-arrangement in which the tips have a smaller distance from each other.

Due to the inventive design of the segment bearing in the form of a double row Schrägwälzlagerung (alternating bearing design) is each double row 5 to see in cross-section as Schrägwälzlagerprinzip. Both double rows 5 have a common segment axis of rotation with different pitch circles. The four rows of rolling elements 5 roll on the raceways of the inserted race segments 4 between the guide part 2 (Inner ring segment) and the slide part 1 (Outer ring segment) from.

The races 4 are designed as race segments loose in raceway recordings 6 of the sled 1 and the leadership part 2 are inserted. To the races 4 of the leadership part 2 set in the axial direction are at the two ends of the guide member 2 end stop elements 7 for the race segments 4 provided with blind holes for the ends of the race segments 4 are provided.

The rolling elements 3 the two rows of rolling elements 5 are - as in particular from the 6 can be seen - in a common cage segment 8th arranged. Again, there are - to a frontal emergence of the cage segments 8th from the sled part 1 to prevent - at the two ends of the slide part 1 end stop pieces 9 for the cage segments 8th or the raceway segments 4 intended.

The sledge part 1 is radial in two segment halves 1.1 . 1.2 divided, the mutual distance to adjust the bearing clearance and the bias is adjustable. In addition, the two segment halves 1.1 . 1.2 each a centering seat 10 on, causing the two segment halves 1.1 . 1.2 regardless of their mutual attitude are always coaxial with each other and stay. In addition, the two segment halves 1.1 . 1.2 positively connected with each other.

As in particular from 6 follows, is the drainage surface of the races 4 designed as circular arc groove, wherein the raceway groove radius is slightly larger than the radius of the spherical rolling elements 3 ,

The adjustment of the storage system is done by the vote of the split segment ring 1.1 . 1.2 , When setting the row spacing and thus depending on the play-free or preloaded (loaded) state, the pressure of the rolling elements 3 on the raceways of the race segments 4 , In this case, the pressure angle changes until the pressure line is adjusted in a straight line on pressure cone tips, center of the race, center of radii and center of the ball. Here are the inserted race ring segments 4 over their longitudinal axis to the pool of power and thus provide the raceway surfaces perpendicular to the pressure line ( 6 ). This track adaptation is crucial for the function, life and uniform rolling of the rolling elements 3 , as well as the low, uniform rotation or displacement resistance due to Reibkraftausmittlung at the Laufbahnberührstellen. The difference in the pressure angle depends on the operating condition and is in the interpretation of the Tordierverhalten the race 4 to take into account.

The trained as balls rolling elements 3 roll over the roll axis in a circular arc groove taking into account a osculation, since the track groove radius is slightly larger than the ball radius. This results in a maximum possible elliptical support surface with minimal slippage. The difference in diameter in the area of the supporting or contact surface determines the circumferential difference and thus the differential slip or the friction. The race segment 4 turns by twisting in the direction of the arrow 11 with its career in the most favorable geometry position and forms the optimum compromise between rolling resistance and system rigidity, thereby resulting in a uniform rolling.

The uniform rolling (direct velocity) of successively arranged rolling elements 3 in a row, the cage migrates. The more uniform the unwinding of the rolling elements 3 takes place to each other, the lower is the leading or lagging of individual rolling elements 3 that the cage 8th Sliding or braking unevenly (slipping phenomenon). This affects the sliding resistance and the frictional conditions and may even block the pivoting movement and tense the cage 8th to lead. This can be prevented by the most optimal adaptation of the Abrollgeometrie according to the invention.

The cage segment 8th holds the rolling elements 3 at a distance to avoid mutual tarnishing and rubbing. The cage segment 8th can - as already stated - include both rows of rolling elements or alternatively take each row individually. Thus each row remains free for itself and can move unaffected by the other without compulsion. The rows of rolling elements as well as the cages 8th are designed in their segment length so that they do not escape from the storage system after the maximum stroke, ie the cage 8th is shorter by about half the stroke than the short segment part 1 ,

Claims (11)

Segment bearing for the radial and axial bearing of a slide part ( 1 ) on a guide part ( 2 ), the slide part ( 1 ) via rolling elements ( 3 ) on the management part ( 2 ), which are connected to races ( 4 ) of the carriage or guide part ( 1 . 2 ), whereby the slide part ( 1 ) over at least two opposing Doppelwälzkörperreihen ( 5 ) on the management part ( 2 ) is mounted and the rows of rolling elements ( 5 ) are each formed in the manner of an angular contact ball bearing, characterized in that the running surface of the races ( 4 ) is designed as a circular arc groove, wherein the raceway groove radius is slightly larger than the radius of the spherical rolling elements ( 3 ), so that the races ( 4 ) under the pressure of the rolling elements ( 3 ) to adjust the raceway. Segment bearing according to claim 1, characterized in that the guide part ( 2 ) and the sledge part ( 1 ) are designed circular arc. Segment bearing according to claim 1 or 2, characterized in that the two rows of rolling elements ( 5 ) are mirror images of each other. Segment bearing according to claim 3, characterized in that the radially outer races ( 4 ) in the axial direction adjacent to each other (O-arrangement) or mutually spaced (X-arrangement) are arranged. Segment bearing according to one of claims 1 to 4, characterized in that the races ( 4 ) are formed as race segments which are loosely inserted in raceway mounts ( 6 ) of the slide ( 1 ) and / or the management part ( 2 ) are inserted. Segment bearing according to claim 5, characterized in that at the two ends of the guide part ( 2 ) end stop elements ( 7 ) for the raceway segments ( 4 ) provided with blind hole receptacles for the ends of the raceway segments ( 4 ) are provided. Segment bearing according to one of claims 1 to 6, characterized in that the rolling elements ( 3 ) of the two rows of rolling elements ( 5 ) in a common cage segment ( 8th ) are arranged. Segment bearing according to claim 7, characterized in that at the two ends of the slide part ( 1 ) front stop pieces ( 9 ) for the cage segments ( 8th ) are provided. Segment bearing according to one of claims 1 to 8, characterized in that the slide part ( 1 ) and / or the management part ( 2 ) radially into two segment halves ( 1.1 . 1.2 ), whose mutual distance is adjustable to adjust the bearing clearance or the bias voltage. Segment bearing according to claim 9, characterized in that the two segment halves ( 1.1 . 1.2 ) by means of a centering seat ( 10 ) koa to each other xial aligned. Segment bearing according to claim 9 or 10, characterized in that the two segment halves ( 1.1 . 1.2 ) are positively connected with each other.