USRE17838E

USRE17838E - gayman

Info

Publication number: USRE17838E
Authority: US
Publication date: 1930-10-21

Description

Oct. 21, 1930. B. A. GAYMAN Re. 17,838

SLEEVE FOR ROLLER BEARINGS original Filed Deo. e, 1926 Ufff@ Reissued Oct. 21, 1930 UNITED STATES PATENTi oFFicE BERT A. GAYMAN, F SAN FRANCISCO, CALIFORNIA, ASSIGNOR TO LINK BELT COI-.- PANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS SLEEVE FOR ROLLER BEARINGS original No. 1,699,330, dated January 15, 1329, serial Na. 152,744, med December e, 192e. Application I for reissue led August 14; 1929. Serial No. 385,769.

My invention relates to an improvement in sleeves forroller bearings and is particularly applicable in connection f with the mounting of double roller bearings upon a shaft. My invention is an improvement upon the methods now in vogue which in general fall into two distinct types as follows:

First, the shaft is carefully finished at considerable expense by turning or grinding'to very accurate dimensions to fit the standard anti-friction bearing. It is impossible to use this method for mounting anti-friction bearings on commercial shafting because commercial shafting varies considerably in diameter and a standard bearing would be either too small to be applied or too loose to lit shafting as ordinarily olfered the trade. Second, the anti-friction bearings are mounted on sleeves whose inside diameter is suiciently greater than the outside diameter of the largest variation in the diameter of commercial shafting so that the sleeves are then clamped or otherwise fastened to the shaft. rlhe clearance between the sleeves and the shaft, particularly when the shaft is undersize, may be sufficient to canse the failure 1 of the sleeves from deflection or crystallization because the sleeves are anchored to the shaft outside the bearing and the load has to be transferredthrough the sleeves.

In carrying out myinvention I propose to interpose between the inner race of each of the bearings and the shaft a sleeve having a tapered exterior surface7 the inner periphery of the inner race having also a tapered surface conforming to the tapered exterior surface of the sleeve. The inside diameter of this sleeve issuiiiciently large to pass over commercial size shafting and by drawing it through the tapered race the sleeve which has one or more slots to permit it to be wedged against the shaftby the inner race is made to clamp the shaft rigidly with the result that there is a continuous mass of metal interposed between the shaft and the race, the parts being all rigidly held together. Thus -there is a direct' contact and a direct transfer of the load from the shaftthrough the sleeve to the race or vice versa..

Other objects will appear from time to time throughout the specification and claims.

My invention is illustrated more or less diagrammatically in the accompanying drawings, wherein- Figure l is a section on a. with the axis of the shaft;

Figure 2 is a detail side elevation of one of the sleeves;

Figure 3 is a section along the line 3 3 of Figure 2;

Figure 4 is a section along the line 4 4 of Figure 1.

Like parts are indicated by like characters throughout the specification and drawin A is the shaft, A1 the lower portion of a p11- low block, A2 a bearing cap held in place by bolts As. The pillow block has an interior spherical surface A* in which the spherical bushing A5 is permitted a certain amount of adjusting movement to prevent binding of plane parallel of thisbushing A5 is cylindrical and always in line with the shaft. B B1 are wedging' sleeves slotted at B2 and B12 with their outer ends threaded at B3. The interior portion of each sleeve is cylindrical and conforms generally in diameter to the diameter of the shaft. v The unthreaded portion of the sleeve has an outwardly inclined or tapered surface B". The slots B2 B12 are staggered or alternated so that both the threaded and the tapered portion is slotted and since these slots overlap, a very large degree of constriction of the sleeve is permitted. The number of the slots and the relation between the slots extending through the tapered portion and the threaded portion of the sleeve will of course vary depending on the size of the shaft, it being necessary to have suchv a number of these slots as will be sufficient to vgive the sleeve, however big it may be, sulficient compressibility so that it may accomplish its B to conform to an engage the exterior tai pered surface on the sleeve. B8, Bs are rolle-r members located between the inner races Bs and `outer races B9, these outer races being in engagement with the cylindrical portion of the bushing A5.

Associated with the outer ends of each of the sleeves B, B1 are clamping nuts C. These clamping nuts surround the shaft and are interiorly threaded to engage the threaded portion B3 on the sleeve. When these nuts are rotated with respect to the sleeves they engage the sides of the inner roller races and draw the sleeves axially through the tapered portion of the inner roller races, thereby constricting the tapered portion of the sleeve and clamping the race and sleeve rigidly in position on the shaft with the wedge portion of the sleeve directly interposed between the race and the shaft. The fact that the two sleeves interlock makes it possible to prevent the turning of the sleeve with the nut, and thus permit screwing ofthe nut into its position on the sleeve.

C1 is a set screw whereby the nut may be locked on the shaft to prevent rotation after it has been tightened up. C2 C2 are filler rings closing the open ends of the bushings A5. They have oil channels C3 in working engagementwith the outer periphery of the clamp nut, to seal the lubricant in the bearing, and cylindrical spacer means C4 engaging the outer ends-of the roller races to properly position thein in the bushing and with respect to the inner race. Cap screws C5 are provided to hold these filler rings in place and shims C are used to correctly adjust the liller rings and prevent binding or losening of rollers between inner and outer races.

While I have illustrated my invention as applied to a self-aligning pillow block with its separate bushing, it is obvious that the bushing might be liXed in position instead of movable and adjustable as in the self-aligning pillow block or the bearing might be a bushing and still respond to the language used in the claims. I have shown a number of slots in the compressible sleeve. j Perhaps for small bearings but a single bearing could be used, perhaps the slots might extend clear through the threaded or tapered portion or only the threaded or tapered portion might be used. Inother words, any suitable slotting arrangement which makes it possible to give the compressible character to the tapered sleeve would be satisfactory and it is even possible that under some conditions a tapered sleeve of compressible material not slotted at all might be used.

I claim:

1. A mounting for anti-friction bearings and the like comprising a pair of opposed annular rings adapted to encircle a shaft, each ring having a central exteriorly tapered portion and a cylindrically threaded portici, beyond the reduced end of Vthe tapered portion, each ring also having a semi-circular cylindrical portion projecting beyond the large end of' the tapered portion whereby the two semi-circular cylindrical portions may interlock to hold the rings against relative rotation, slots extending through the tapered portion ofeachring to the threaded cylindrical portion alternately wit-h slots extending through the threaded cylindrical portion into the tapered portion, interiorly tapered anti-friction bearing races adapted to engage the tapered portion of each of the i sleeves, collars in threaded engagement with the threaded portion of the sleeves adapted to yabut against the outer edges of the antifriction bearing races to longitudinally displace the sleeves with respect to the bearing races to clamp the sleeves and races in position on the shaft. l

2. An anti-friction bearing comprising two taper roller inner races abutting one another, these races being interiorly tapered with their larger diameters adjacent, a separate tapered sleeve, associated with each race, means interposed between the opposed ends of the sleeves and their adjacent races to draw the sleeves outwardly away from one another to wedge each within its own race.

3. An anti-friction bearing having two taper roller inner races adjacent one another, interiorly tapered with their larger diameters adjacent, a separate tapered sleeve, one associated with each race, means interposed between the opposed ends of the sleeves and their adjacent races to draw the sleeves outwardly away from one another to wedge each within its own race, said means comprising threaded cylindrical portions on the sleeves and nuts threaded thereon and engaging the outer ends of the bearing races,- a container, outer bearing races therein, taper rollers interposed between the races and means for holding each outer race in place in the container, said 'means comprising.

rings, the nuts being for a portion of their length cylindrical and making a close running fit with the inner bore of the rings, and projecting beyond the end of the container.

4. In combination two adjacent taper roller bearings interiorly tapered with their major diameters adjacent two compression sleeves cylindrical to engage a shaft, ezrteriorlyA tapered to engage the tapered races and threaded at their outer ends where they eX- tend beyond the races, a nut threaded on each such threaded outer end adapted to engagek the outer side of the bearing race, and means for limiting relative rotation of the sleeves while permitting relative longitudinal displacement of the sleeves.

5. In combination two adjacent taper roller bearings interiorly tapered with their major diameters adjacent, two compression sleeves cylindrical to engage a shaft, exteriorly tapered to engage the tapered races and threaded at their outer ends Where they i extend beyond the races, a nut threaded on each such threaded outer end adapted to engage the outer side of the bearing race, the sleeves being free to permit longitudinal displacement in opposite direction with respect to the races with which they are respectively associated.

6. In combination two adjacent taper roller bearings interiorly tapered with their major diameters'adjacent, two compression sleeves cylindrical to engage a shaft, ex.

i teriorly tapered to engage the tapered races and threaded at their outer ends Where they extend beyond the races, a nut threaded on each such threaded outer end adapted to engage the outer side of the bearing race, and means for limiting relative angular displacement of the sleeve, the nuts projecting beyond the ends of the container.

7. In combination two adjacent taper roller bearings interiorly tapered with their major diameters adjacent, two compression sleeves cylindrical to engage a( shaft, exteriorly tapered to engage the tapered races and threaded at their outer ends where they extend beyond the races, a nut threaded on each such threaded outer end adapted to engage the outer side of the bearing race, the sleeves being lfree to permit longitudinal displacement in opposite direction with respect to the races With which they are respectively associated, the nuts projecting beyond the ends of the container.

Signed at San Francisco, county of San Francisco, and State of California, this 30th day of April, 1930.

` BERT 1A.. GAYMAN.