CN1580592A

CN1580592A - Roller bearing

Info

Publication number: CN1580592A
Application number: CN 200410014971
Authority: CN
Inventors: 蔡旭东; 沈忠明; 屈平
Original assignee: Changshu Great Wall Bearing Co Ltd
Current assignee: Suzhou Great Wall Precision Technology Co Ltd
Priority date: 2004-05-18
Filing date: 2004-05-18
Publication date: 2005-02-16
Anticipated expiration: 2024-05-18
Also published as: CN1299017C

Abstract

A cylindrical bearing used on a a tension arm shaft of a multiarm unit for driving is composed of inner and outer rings, an needle rollers between them and a pair of blocking rings among which, both sides of the central channel of the inner cycle of the outer ring are concaved and set with two loop-blocking notches, the needle rollers are close to each other and fully filled between the roll channel of the outer ring and the outer cycle of the inner ring, two ends of which extend outward to set two positioning rings, the pair of block rings are set in the notches fixed by the positioning rings.

Description

Roller bearing

Technical field

The present invention relates to a kind of roller bearing, is the improvement to the roller bearing structure that plays gearing on the existing dobby head broaching tool arm that particularly is applied to weave.

Background technique

Employed bearing is common roller bearing on the broaching tool arm axle of the dobby of existing textile manufacturing machine weaving machine, its structure as shown in Figure 3, it is by inside and

outside circle

2,1 and be located at the needle roller 4 (being the retainer assembly) of the band retainer 6 between the inside and

outside circle

2,1 and add the back-up ring 3 that is located at retainer assembly both ends of the surface and form, and also offers oil hole 5 on inner ring 2.There is following defective in actual use in the roller bearing of this kind structure: at first, because the back-up ring 3 of both ends of the surface separates fully with inner ring 2, in the time of on being installed to the broaching tool arm axle of dobby, exist the gap between back-up ring 3 and the installation shaft, when bearing working, inner ring 2 is non-rotary, and back-up ring 3 is subjected to the drive of retainer assembly and outer ring 1, therefore rotate around installation shaft, exist that structure is not compact, back-up ring 3 comes off easily, the problem of safety in utilization difference; Secondly, after adopting the retainer assembly, owing to there is bigger gap between back-up ring 3 and the retainer 6, make the retainer assembly when work to do axial float leeway bigger, cause the retainer 6 of taking needle roller 4 situation of moving to occur towards a lateral deviation of raceway, cause the loading ability of bearing off-centring therefrom, influence the reliability of bearing working, and finally have influence on the working life of bearing; Moreover, because needle roller 4 is done to be provided with at interval on retainer 6 each other, and the length of needle roller 4 is less than the width of raceway, make the raceway zone between the adjacent needle roller 4 and the both sides of raceway be in idle state, supporting region is not to be full of whole raceway when work, thereby makes the corresponding reduction of bearing capacity of roller bearing; Again, arbor hole does not have suitable knuckle in two end faces among the inner ring 2 of original bearing, has brought certain difficulty for the use installation of bearing.

Summary of the invention

Task of the present invention be a kind of compact structure, back-up ring difficult drop-off will be provided, safety in utilization is good, the loading ability of bearing center can not be offset, functional reliability is good, long service life, roller bearing that bearing capacity is big.

Another task of the present invention is that a kind of roller bearing easy to install and use will be provided.

Task of the present invention is finished like this, a kind of roller bearing, it is made up of inside and

outside circle

2,1 and the needle roller 4 and a pair of back-up ring 3 that are located between the inside and

outside circle

2,1, is characterized in: the both sides of the raceway 11 that rolls for needle roller 4 in the middle of the inner peripheral surface of described outer ring 1 are concaved with circlip groove 10 respectively; Described needle roller 4 is filled between the excircle of the raceway 11 of outer ring 1 and inner ring 2 with reclining mutually each other; The two ends of described inner ring 2 have outwards extended positioning ring 6, and a pair of back-up ring 3 lays respectively in the described circlip groove 10, and fix with described positioning ring 6.

Another task of the present invention is finished like this, and it is that both side ends at the central shaft hole 7 of described inner ring 2 is shaped on chamfering 13 respectively.

The length of needle roller 4 of the present invention is consistent with the width of raceway 11.

The present invention is shaped on back-up ring platform 12 on described positioning ring 6, be shaped in the back-up ring hole 9 in the middle of a pair of back-up ring 3 correspondingly to be used for the back-up ring tang 8 that matches with back-up ring platform 12.

The present invention has following advantage: at first, owing to saved retainer, needle roller is filled between whole raceway, and the length of needle roller conforms to the width of raceway, can improve the bearing capacity of bearing so to greatest extent, its bearing capacity can improve three times, prolonged the working life of bearing, because the spacing between the back-up ring on the both ends of the surface of needle roller and needle roller both sides is very little, improved the guidance capability of back-up ring simultaneously needle roller, can limit the axial float of needle roller like this, make the bearing operation more steady; Secondly,, when work, can not follow the rotation of outer ring and rotate, therefore use safer, more compact structure because back-up ring is fixedly arranged on the positioning ring of inner ring; In addition, because after being assemblied in back-up ring on the inner ring, under the prerequisite that does not change bearing boundary dimension, the width widen of inner ring, thus can improve the intensity of inner ring; After the central shaft hole both side ends of inner ring is shaped on chamfering, made things convenient for the use of bearing to install again.

Accompanying drawing and drawing explanation

Fig. 1 is one embodiment of the invention three-dimensional structure diagram.

Fig. 2 is the plane structure sectional view of Fig. 1.

Fig. 3 is original technical architecture plan of the present invention.

Embodiment

Ask for an interview Fig. 1 and the present invention is further illustrated in conjunction with Fig. 2.Be formed with the raceway 11 that rolls for needle roller 4 in the middle of the inner peripheral surface of outer ring 1 of the present invention, the both sides of raceway 11 cave inward or claim and then expand and establish and form circlip groove 10.Slightly narrow the stretching out in the two ends of inner ring 2 of the present invention and be formed with positioning ring 6, the external diameter of positioning ring 6 be less than the external diameter of inner ring 2 with contracting, and be shaped on a pair of back-up ring platform 12 on positioning ring 6; The centre of inner ring 2 is for being installed to the central shaft hole 7 on broaching tool arm axle of dobby for it, being shaped on knuckle respectively in the both side ends of central shaft hole 7 is chamfering 13, and the effect of chamfering 13 is assemblings for convenience; Simultaneously, for lubricant oil is added in the raceway working area, also offering through hole on inner ring 2 is oil hole 5, and oil hole 5 generally has three, is distributed on the inner ring 2.The length of needle roller 4 of the present invention is consistent with the width of raceway 11, and needle roller 4 is filled between the excircle of the raceway 11 of outer ring 1 and inner ring 2.The centre of a pair of back-up ring 3 of the present invention is back-up ring hole 9, be shaped on, position corresponding back-up ring tang 8 identical on the back-up ring hole 9 with back-up ring platform 12 quantity, realize making back-up ring 3 and positioning ring 6 to fix by the scarf each other between back-up ring tang 8 and the back-up ring platform 12, and make a pair of back-up ring 3 be positioned at the circlip groove 10 of outer ring 1 just.Back-up ring of the present invention 3 is not unique with the means of fixation of inner ring 2, and it can also be to offer circlip groove respectively in the both sides of inner ring 2, and the back-up ring hole 9 of back-up ring 3 by the centre is fixed in the circlip groove of inner ring 2 both sides etc.

The present invention when mounted, as long as be assemblied on the broaching tool arm axle by the central shaft hole 7 in the middle of it.When bearing working, inner ring 2 is fixed, and needle roller 4, outer ring 1 rotate, and therefore a pair of back-up ring 3 does not rotate owing to be restricted on the inner ring 2.

Claims

1, a kind of roller bearing, it is made up of inside and outside circle (2), (1) and the needle roller (4) and a pair of back-up ring (3) that are located between inside and outside circle (2), (1), it is characterized in that the both sides of the raceway (11) that rolls for needle roller (4) in the middle of the inner peripheral surface of described outer ring (1) are concaved with circlip groove (10) respectively; Described needle roller (4) is filled between the excircle of the raceway (11) of outer ring (1) and inner ring (2) with reclining mutually each other; The two ends of described inner ring (2) have outwards extended positioning ring (6), and a pair of back-up ring (3) lays respectively in the described circlip groove (10), and fixing with described positioning ring (6).

2, roller bearing according to claim 1 is characterized in that being shaped on chamfering (13) respectively in the both side ends of the central shaft hole (7) of described inner ring (2).

3, roller bearing according to claim 1 is characterized in that the length of described needle roller (4) is consistent with the width of raceway (11).

4, roller bearing according to claim 1, it is characterized in that on described positioning ring (6), being shaped on back-up ring platform (12), be shaped in the back-up ring hole (9) in the middle of a pair of back-up ring (3) correspondingly and be used for the back-up ring tang (8) that matches with back-up ring platform (12).