CN203404248U

CN203404248U - Tapered roller bearing

Info

Publication number: CN203404248U
Application number: CN201320521087.8U
Authority: CN
Inventors: 孙立松
Original assignee: (shanghai) Transmission Technology Co Ltd
Current assignee: Quqiao Shanghai Enterprise Management Consulting Center LP
Priority date: 2013-08-23
Filing date: 2013-08-23
Publication date: 2014-01-22
Anticipated expiration: 2023-08-23

Abstract

Disclosed is a tapered roller bearing. The tapered roller bearing comprises an inner ring, an outer ring, retainers and a plurality of tapered rollers. A tapered inner ring roller path is arranged on the outer circumferential face of the inner ring. A tapered outer ring roller path is arranged on the inner circumferential face of the outer ring. The tapered rollers are evenly arranged between the inner ring roller path and the outer ring roller path through the retainers. The tapered roller bearing further comprises a check ring. The check ring is tightly attached to the axial outer side at the large inner diameter end of the outer ring. An extension portion attached to the large end faces of the tapered rollers is arranged on the check ring. A flange protruding out of the inner ring roller path is arranged at the small outer diameter end of the inner ring. A flange face which is attached to the small end faces of the tapered rollers is arranged on the flange. The tapered roller bearing is simple in structure and convenient to machine, the machining efficiency is improved, the machining cost is reduced, the phenomenon that a large stopping edge cracks in a traditional tapered roller bearing is avoided, the noise is reduced, and the bearing capacity of the bearing is improved.

Description

Tapered roller bearing

Technical field

The utility model belongs to field of bearings, relates in particular to a kind of tapered roller bearing.

Background technique

Tapered roller bearing belongs to divergence type bearing, and can bear is radially main footpath, axial connected load, and it is widely used in the industries such as automobile, milling train, mine, metallurgy, plastics machinery.

As shown in Figure 1, when tapered roller bearing adopts outer ring axially locating, axial pre tightening force need be acted on inner ring end face, then play is adjusted to the optimum state.

Particularly, when axial pre tightening force F1 acts on inner ring end face, inner ring axial force is delivered on tapered roller, make tapered roller and outer ring raceway produce axial displacement, but inner ring is subject to the reaction force F2 of roller end face to inner ring large-flange a simultaneously, cannot produce axial displacement, and pretightening force reaches one regularly, tapered roller exists all the time to the reaction force F2 of inner ring large-flange a, because inner ring end face does not have axially locating, grinding undercut c between inner ring large-flange and inner ring raceway can produce very large stress and concentrate, and when serious, produce and bursts apart.

In addition because tapered roller and inner ring are to have two surface of contact, that is: inner ring raceway and rib, be subject to the restriction of process equipment precision level, all the time there is deviation in the angle of inner ring raceway, rib and the angle of tapered roller, can cause rotation not steady, easily produce noise, due to the existence of inner ring large-flange a and little rib b, roller length limited space, thus bearing load rating is restricted.

Model utility content

Based on this, for above-mentioned technical problem, provide a kind of tapered roller bearing.

For solving the problems of the technologies described above, the utility model adopts following technological scheme:

A kind of tapered roller bearing, comprise inner ring, outer ring, retainer and a plurality of tapered roller, the outer circumferential face of described inner ring is provided with the inner ring raceway of taper, the inner peripheral surface of described outer ring be provided with taper outer ring raceway, described a plurality of tapered roller is located between described inner ring raceway and outer ring raceway uniformly by described retainer, it is characterized in that, also comprise back-up ring, described back-up ring is close to the axial outside of the large diameter end of being located at described outer ring, and this back-up ring is provided with the extension that the large end face with described tapered roller is affixed, the little external diameter end of described inner ring is provided with the flange protruding from inner ring raceway, on described flange, there is the flange surface that the small end face with described tapered roller is affixed.

The dismountable axial outside of being located at the large diameter end of described outer ring of described back-up ring.

The utility model is simple in structure, easy to process, has improved the efficiency of processing, has reduced processing cost, and has avoided the phenomenon that in traditional round taper roller bearing, large-flange bursts apart, and has reduced noise, has improved the bearing capacity of bearing.

Accompanying drawing explanation

Below in conjunction with the drawings and specific embodiments the utility model, be elaborated:

Fig. 1 is the schematic diagram of traditional round taper roller bearing;

Fig. 2 is structural representation of the present utility model.

Embodiment

As shown in Figure 2, a kind of tapered roller bearing, comprises inner ring 110, outer ring 120, retainer 130, a plurality of tapered roller 140 and back-up ring 150.

The outer circumferential face of inner ring 110 is provided with the inner ring raceway 111 of taper, and inner ring 110 has little external diameter end 112, large external diameter end 113.

Wherein, the little external diameter end 112 of inner ring 110 is provided with the flange 114 protruding from inner ring raceway 111, has the flange surface 115 that the small end face 141 with tapered roller 140 is affixed on flange 114.

The design of flange 114 is equivalent to the little rib in traditional round taper roller bearing, the utility model has only designed flange 114, and the large-flange of having cancelled in traditional round taper roller bearing designs, make tapered roller 140 end face reaction forces without point of action, cannot produce reaction force, avoided traditional round taper roller bearing stress to concentrate on grinding undercut, the phenomenon that the large-flange causing bursts apart.

The cancellation design of inner ring large-flange, makes tapered roller contact with inner ring and only has face of roller, has avoided inner ring raceway and large-flange angle to be subject to the impact of machining accuracy, causes the noise of bearing generation.

The cancellation design of inner ring large-flange, make the axial length space of tapered roller obtain release, roller length can lengthen, thereby the bearing capacity of bearing also can be improved, avoided two shelves margins of inner ring roller axial space processed, the defect that causes bearing load carrying capacity not improve.

After the cancellation of inner ring large-flange, no longer need grinding and the superfinishing operation of large-flange, improved the efficiency of processing, reduced processing cost.

The inner peripheral surface of outer ring 120 be provided with taper outer ring raceway 121, and outer ring 120 has little inner-diameter end 122, large diameter end 123.

A plurality of tapered rollers 140 are located between inner ring raceway 111 and outer ring raceway 121 uniformly by retainer 130.

Back-up ring 150 is close to the axial outside of the large diameter end 123 of being located at outer ring 120, and this back-up ring 150 is provided with the extension 151 that the large end face 141 with tapered roller 140 is affixed, and to tapered roller 140, can play an axial guiding function.

Be understandable that the dismountable axial outside of being located at the large diameter end of outer ring 120 of back-up ring 150.

But, those of ordinary skill in the art will be appreciated that, above embodiment is only for the utility model is described, and be not used as restriction of the present utility model, as long as within the scope of connotation of the present utility model, to the above embodiment's variation, modification, all will drop within the scope of claims of the present utility model.

Claims

1. a tapered roller bearing, comprise inner ring, outer ring, retainer and a plurality of tapered roller, the outer circumferential face of described inner ring is provided with the inner ring raceway of taper, the inner peripheral surface of described outer ring be provided with taper outer ring raceway, described a plurality of tapered roller is located between described inner ring raceway and outer ring raceway uniformly by described retainer, it is characterized in that, also comprise back-up ring, described back-up ring is close to the axial outside of the large diameter end of being located at described outer ring, and this back-up ring is provided with the extension that the large end face with described tapered roller is affixed, the little external diameter end of described inner ring is provided with the flange protruding from inner ring raceway, on described flange, there is the flange surface that the small end face with described tapered roller is affixed.

2. a kind of tapered roller bearing according to claim 1, is characterized in that, the dismountable axial outside of being located at the large diameter end of described outer ring of described back-up ring.