CN201475164U

CN201475164U - Composite roller bearing

Info

Publication number: CN201475164U
Application number: CN2009203063897U
Authority: CN
Inventors: 曾孝兵; 阎昌春
Original assignee: Hangzhou C & U Bearing Co Ltd
Current assignee: Hangzhou C & U Bearing Co Ltd
Priority date: 2009-07-17
Filing date: 2009-07-17
Publication date: 2010-05-19
Anticipated expiration: 2019-07-17

Abstract

The utility model relates to a roller bearing, in particular to an angular contact ball bearing; comprising an inner ring and an outer ring, a retainer and a steel ball are arranged between the inner ring and the outer ring, and a step shape is formed at the locking notch of the outer ring. The utility model provides an angular contact ball bearing which has small grinding area and low grinding heating value, improves the processing precision of a bearing ring and has low bearing deformation; the technical problems that the ferrule of the bearing in the prior art is easy to cause grinding and deformation in the processing process and the deformation of the outer diameter of the bearing is obvious are solved.

Description

A kind of compound roller bearing

Technical field

The utility model relates to a kind of compound roller bearing, relates in particular to a kind of composite bearing that is applicable on forklift door frame or the goods shelf.

Background technique

Existing bearing is by fixed block, movement parts and rolling element three parts are formed, generally can only finish rotatablely moving of single direction, the roller bearing of using on the door frame of fork truck and the goods shelf has vertical roller bearing and side direction roller bearing at present, vertically roller bearing mostly is the radial inflow rolling bearing, side direction roller bearing mostly is the axle sleeve type sliding bearing, during use, vertically roller bearing and side direction roller bearing are installed respectively, and institute takes up space big, installation and maintenance inconvenience, sideshake is adjusted difficulty, because of being subjected to distance limit between two vertical rollers, two direction finding roller spacings are lacked, and door frame and the goods lateral stability of frame again are relatively poor, under the situation of unbalance loading, easily produce catching phenomenon.At the problems referred to above, someone has applied for Chinese patent: " compound roller bearing (CN2156332Y) ", compound roller bearing connects main roller bearing and side wheel bearing with spindle nose, the main roller bearing is by inner ring, rolling element, outer ring and inner shield ring constitute, inner ring and inner shield ring all are enclosed within outside the end of spindle nose, in this end the hole is arranged, the side wheel bearing is by axle, lining, steamboat and be configured to, prop up and be placed in the hole of spindle nose one end, axle is contained on the support, and steamboat is contained on the axle, and steamboat and between centers have composite bush.Though this structure has realized the rotation of both direction, but bearing is worked in forklift door frame, the existence of axial force is often arranged, make bearing side wheel and support wear and tear mutually, the support wear out failure that hardness is softer, and bearing is exposed in the open, the environment very severe, very easily make impurity such as silt, dust enter bearing cavity, also can make bearing failure stuck.Having more than 80% that the compound wheels side roller bearing of fork truck lost efficacy is to belong to both of these case.

Summary of the invention

The utility model has mainly provided a kind of roller in the side wheel bearing and support impurity such as actual effect and silt, dust that wear and tear mutually that can effectively prevent and has entered bearing cavity, improves the compound roller bearing in the working life of side wheel bearing; Solve the existing in prior technology bearing at work because the existence of axial force, make roller and the support actual effect of wearing and tearing mutually, and bearing stuck technical problem easily.

Above-mentioned technical problem of the present utility model is mainly solved by following technical proposals: a kind of compound roller bearing, comprise the main roller bearing and the side wheel bearing that link together by spindle nose, described side wheel bearing comprises the support that is positioned at the spindle nose cavity, in support, be provided with roller, support is connected by the axle of cross-under on support with roller, roller housing is connected on the axle, the both sides that join at roller and support respectively are provided with an annular groove, are provided with the thrust-bearing that is socketed on the axle in annular groove.Between roller and support, add the thrust-bearing of two cover symmetric arrangement, thrust-bearing all can bear axial force about using in pairs, replaced the structure that is connected by lining between the roller and support in the original structure, thereby prevented the direct contact between side wheel and the support, roller does not directly contact with support, slip by common roller becomes pure rolling, and the thrust load of roller work passes to support by thrust ball bearing, the wearing and tearing that friction causes have been significantly reduced, the working life of having improved bearing.When if impurity such as dust need enter in the roller, must be by the gap between thrust-bearing and the roller, just can enter in the roller via rolling element of thrust-bearing inside etc. again, well play and stop impurity to enter in the bearing in multiplexor recoil district, makes the Security of fork truck can not get ensureing.

Thrust-bearing can be thrust ball bearing or thrust roller bearing, as preferably, described thrust-bearing is a thrust ball bearing, described thrust ball bearing is between support and roller, and the interior edge face of described support and the interior edge face of roller join with the stress surface at the two ends of thrust ball bearing respectively.Have cavity on the support, in cavity, place roller, the axle cross-under is in groove, roller housing is connected on the axle, and pivot, the interior edge face of support just refers to the interior edge face of support cavity, and the roller end face of support is connected on the axial end of thrust ball bearing and has guaranteed that the axial force of roller can effectively be delivered on the support by bearing, improves the support effect of support.

As preferably, the depth of groove on the described roller is greater than the external diameter of the thrust-bearing distance to the groove bottom land.The end face that just refers to roller is connected on the radial end face of outer retainer, and this structure can improve the run stability of thrust-bearing.

As preferably, described spindle nose is socketed with shaft block ring and dustproof sheet outward, and described shaft block ring and dustproof sheet are positioned at a side of the inner ring of main roller bearing.Shaft block ring and dustproof sheet are set effectively prevent entering of foreign matter, improve the run stability of main roller bearing and side wheel bearing, kept the relative position relation between main roller bearing and side wheel bearing simultaneously.

As preferably, described roller adopts the powdered metallurgical material of selflubricating to make, and described support adopts the 40Cr material to make.Roller adopts has powder metallurgical technique to substitute Bearing Steel, be porous material behind the iron powder sintering, immersion oil is handled and can be realized selflubricating, can simplified structure and door frame channel-section steel lubricate to contacting with it, support selects for use the more superior 40Cr of mechanical property to substitute the 45# steel, improves the rigidity of support.

Therefore, a kind of compound roller bearing of the present utility model has following advantage: 1, between roller and support thrust ball bearing is set, avoided roller and the direct of support to contact, original sliding motion structure is become rolling structure, the wearing and tearing that friction causes have been significantly reduced, the working life of having improved bearing; 2, owing to the setting of thrust ball bearing, well play and stop impurity to enter in the bearing in recoil district, a few road, has improved the Security that bearing uses; 3, survey the roller external diameter and adopt arc structure by two end faces, the middle linear structure that adopts, the edge stress that can reduce roller is concentrated, and effectively improves the roller life-span; 4, roller adopts has powder metallurgical technique to substitute Bearing Steel, be porous material behind the iron powder sintering, immersion oil is handled and can be realized selflubricating, can simplified structure and door frame channel-section steel lubricate to contacting with it, support selects for use the more superior 40Cr of mechanical property to substitute the 45# steel, improves the rigidity of support.

Description of drawings:

Fig. 1 is the schematic representation of a kind of compound roller bearing of the present utility model.

Fig. 2 is the enlarged view that Fig. 1 internal trolley and support cooperate.

Embodiment:

Below by embodiment, and in conjunction with the accompanying drawings, the technological scheme of model utility is described in further detail.

Embodiment:

As illustrated in fig. 1 and 2, a kind of composite rolling bearing comprises main roller bearing and side wheel bearing, links to each other by spindle nose 1 between main roller bearing and the side wheel bearing.The main roller bearing is to be made of inner ring 2, outer ring 3 and the rolling element 4 between inner ring 2 and outer ring 3.Be socketed with dustproof sheet 5 and shaft block ring 6 outside spindle nose 1, dustproof sheet 5 and shaft block ring 6 are positioned at a side of the inner ring 2 of main roller bearing.End at spindle nose 1 is provided with cavity 7, is provided with the adjusting screw hole at the other end of spindle nose 1, is provided with adjusting screw 8 and ends loose sheet 9 in the adjusting screw hole.Be provided with the side wheel bearing in cavity 7, the side wheel bearing comprises the support 10 that is positioned at cavity, and axle 11 is housed on support 10, and being socketed with on axle 11 can be around the roller 12 of axle 11 rotations, and roller 12 is positioned at the cavity 13 on the support 10.Respectively be provided with an annular groove on the both sides end face that roller 12 and support 10 join, respectively be placed with a thrust ball bearing 15 in annular groove, thrust ball bearing 13 is socketed on the axle 11.Cavity 13 interior edge faces of support 10 and the axially loaded face of thrust ball bearing 15 join, and the groove interior edge face of roller 12 and the axially loaded face of thrust ball bearing 15 join.

After assembling was finished, main roller bearing and side wheel bearing rotated flexible fluent phenomenon, and with the relative position of adjusting screw 7 adjusting side wheel bearings and spindle nose 1, pin with ending loose sheet 9 suitable back.During work, the thrust load of roller 12 work passes to support 10 by thrust ball bearing 13, has significantly reduced the wearing and tearing that friction causes, the working life of having improved bearing.When if impurity such as dust need enter in the roller, must be 1. by the gap between thrust-bearing and the roller, 2. rolling element passage via thrust ball bearing inside also has thrust ball bearing and the passage that axle joins 3. just can enter in the roller again, well play and stop impurity to enter in the bearing in multiplexor recoil district, makes the Security of fork truck can not get ensureing.

Specific embodiment described herein only is that design of the present utility model is illustrated.The utility model person of ordinary skill in the field can make various modifications or replenishes or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present utility model or surmount the defined scope of appended claims.

Claims

1. compound roller bearing, comprise the main roller bearing and the side wheel bearing that link together by spindle nose, it is characterized in that: described side wheel bearing comprises the support that is positioned at the spindle nose cavity, in support, be provided with roller, support is connected by the axle of cross-under on support with roller, roller housing is connected on the axle, and the both sides that join at roller and support respectively are provided with an annular groove, are provided with the thrust-bearing that is socketed on the axle in annular groove.

2. a kind of compound roller bearing according to claim 1, it is characterized in that: described thrust-bearing is a thrust ball bearing, described thrust ball bearing is between support and roller, and the interior edge face of described support and the interior edge face of roller join with the stress surface at the two ends of thrust ball bearing respectively.

3. a kind of compound roller bearing according to claim 1 and 2 is characterized in that: the depth of groove on the described roller is greater than the external diameter of the thrust-bearing distance to the groove bottom land.

4. a kind of compound roller bearing according to claim 1 and 2, it is characterized in that: described spindle nose is socketed with shaft block ring and dustproof sheet outward, and described shaft block ring and dustproof sheet are positioned at a side of the inner ring of main roller bearing.

5.5. a kind of compound roller bearing according to claim 1 and 2 is characterized in that: described roller adopts the powdered metallurgical material of selflubricating to make, and described support adopts the 40Cr material to make.