CN202883711U

CN202883711U - One-way needle bearing with support

Info

Publication number: CN202883711U
Application number: CN201220539832.7U
Authority: CN
Inventors: 黄伟平
Original assignee: WUXI SUPERHUMAN GEAR COLD EXTRUSION CO Ltd
Current assignee: WUXI SUPERHUMAN GEAR COLD EXTRUSION CO Ltd
Priority date: 2012-10-20
Filing date: 2012-10-20
Publication date: 2013-04-17
Anticipated expiration: 2022-10-20

Abstract

The utility model relates to a one-way needle bearing with a support, comprising a bearing outer ring, needles, a one-way bearing retainer and a bearing inner ring, wherein the bearing outer ring is made of a steel pipe, a plurality of wedge grooves which are distributed along the circumferential direction and along the same direction are uniformly distributed on the outer wall of the bearing inner ring, a plurality of wedge spaces are formed between the plurality of wedge grooves and the inner wall of the bearing outer ring, one needle is mounted in each wedge space, sheet steel springs for pushing each needle from the big end to the small end of the corresponding wedge space are fixed on the one-way bearing retainer, support bearing retainers are respectively distributed in the races at the outer side of the axial two ends of the one-way bearing retainer, and a plurality of rollers are uniformly distributed on the circumference of each support bearing retainer. The bearing outer ring in the bearing provided by the utility model is made of the steel pipe, processing precision is high, concentricity is good, pretty large extrusion force can be borne, roller support bearings are mounted at the two ends of the one-way bearing, and pretty large radial force can be borne.

Description

The unidirectional needle bearing of band supporting

Technical field

The utility model relates to needle bearing, specifically on a kind of belt pulley that is mainly used in automobile current generator, and the unidirectional needle bearing of the band supporting of unidirectional delivery power.

Background technique

At present, existing unidirectional needle bearing for belt wheel of automobile engine, its bearing outer ring all is to be formed by the mild-steel sheet drawing, then adopts carburizing and quenching, and because sheet material is thin, effectively hardened layer is more shallow, and matrix hardness is low; When assembling, an end of bearing outer ring needs flanging, and this flanging end also needs to carry out annealing in process.This bearing outer ring processed complex distortion is large, and machining accuracy is low, and because matrix hardness is low, the power that can carry is less, and stressed rear distortion is large; In addition, the expanding force of generator pulley belt is larger, General Requirements is at 1000-1500N, one-way belt sheave is when doing sudden turn of events speed life test simultaneously, requirement will be converted to 19000 from 5000 and turn in 0.5 second, therefore suffered radial force and acceleration is all very large on the one-way belt sheave, and existing unidirectional needle bearing is difficult to meet the demands.

Summary of the invention

The utility model provides a kind of unidirectional needle bearing with supporting for the problems referred to above, and this bearing machining precision is high, can bear larger extruding force and radial force.

According to the technical solution of the utility model: a kind of unidirectional needle bearing with supporting, comprise bearing outer ring, needle roller, unilateral bearing retainer and bearing inner race, described unilateral bearing retainer is between described bearing outer ring and described bearing inner race, a plurality of described needle rollers are distributed on the circumference of described unilateral bearing retainer, described bearing outer ring is made by steel pipe, be evenly equipped with the wedge slot that circumferentially arrange in the same way on a plurality of edges on the outer wall of described bearing inner race, the quantity of described wedge slot is identical with the quantity of described needle roller, form a plurality of wedge shape spaces between the inwall of a plurality of described wedge slots and described bearing outer ring, a described needle roller is installed in each described wedge shape space, is fixed with the sheetmetal spring of each described needle roller being pushed to small end from the large end of corresponding described wedge shape space on the described unilateral bearing retainer; Be furnished with respectively the block bearing retainer in the raceway in the outside, the axial two ends of described unilateral bearing retainer, be evenly equipped with a plurality of rollers on the circumference of each described block bearing retainer.

Described bearing outer ring adopts the grinding of GCr15 seamless steel pipe to form, and adopts integral quenching heat treatment.

Be evenly equipped with a plurality of axial notches on the outer wall of described bearing inner race, be provided with the flange that matches with described a plurality of axial notches on the inwall of described unilateral bearing retainer.The cross section of described groove and described flange is semicircle.The two ends of described bearing outer ring are fixed with respectively end cap.Described end cap adopts interference fit on described bearing outer ring.

Technique effect of the present utility model is: the bearing outer ring in the utility model is made by steel pipe, and machining accuracy is high, and good concentricity can be born larger extruding force; At the unilateral bearing two ends roller bearing bearing is installed, can bears larger radial force; Roller bearing bearing and unilateral bearing are combined, and structure is more compact, assemble also more convenient.

Description of drawings

Fig. 1 is the structural representation that the utility model dissects vertically.

Fig. 2 is that sectional view is looked on the left side of Fig. 1.

Embodiment

Below in conjunction with accompanying drawing embodiment of the present utility model is further described.

Among Fig. 1, Fig. 2, comprise bearing outer ring 1, needle roller 2, unilateral bearing retainer 3, bearing inner race 4, end cap 5, sheetmetal spring 6, block bearing retainer 7, roller 8, wedge shape space 9, flange 10, groove 11 etc.As shown in Figure 1 and Figure 2, the utility model is a kind of unidirectional needle bearing with supporting, comprise bearing outer ring 1, needle roller 2, unilateral bearing retainer 3, bearing inner race 4, end cap 5 and sheetmetal spring 6, unilateral bearing retainer 3 is between bearing outer ring 1 and bearing inner race 4, and a plurality of needle rollers 2 are distributed on the circumference of unilateral bearing retainer 3.Bearing outer ring 1 is made by steel pipe, adopts the grinding of GCr15 seamless steel pipe to form, and machining accuracy is high, good concentricity, and adopt integral quenching heat treatment, surface hardness is consistent with matrix hardness, can bear larger extruding force.

Bearing inner race 4 adopts the cold extrusion forming processes to form, and is evenly equipped with the wedge slot that circumferentially arrange in the same way on a plurality of edges on its outer wall, and the quantity of wedge slot is identical with the quantity of needle roller 2.The base of wedge slot is made of eccentric arc, and the spacing between the large end of wedge slot and bearing outer ring 1 inwall is greater than the diameter of needle roller 2, and the spacing between the small end of wedge slot and bearing outer ring 1 inwall is less than the diameter of needle roller 2.

Form a plurality of wedge shape spaces 9 between a plurality of wedge slots of bearing inner race 4 and the inwall of bearing outer ring 1, a needle roller 2 is installed in each wedge shape space 9, is fixed with the sheetmetal spring 6 of each needle roller 2 being pushed to small end from the large end of corresponding wedge shape space 9 on the unilateral bearing retainer 3.Sheetmetal spring 6 is installed on the unilateral bearing retainer 3 with mosaic mode, gives all the time 2 one thrusts of needle roller, can guarantee bearing effective engagement at work.

At the axial two ends of unilateral bearing the roller bearing bearing is installed.The roller bearing bearing comprises block bearing retainer 7 and roller 8, and block bearing retainer 7 is arranged in the raceway in the outside, unilateral bearing retainer 3 axial two ends, is evenly equipped with a plurality of rollers 8 on the circumference of each block bearing retainer 7.The roller bearing bearing can bear larger radial force, and itself and unilateral bearing are combined, and structure is more compact, has solved the problem that unilateral bearing can not bearing radial force, assembles also more conveniently.

Unilateral bearing retainer 3 is relative fixing with bearing inner race 4.Outer wall at bearing inner race 4 is evenly equipped with a plurality of axial notches 11, is provided with the flange 10 that matches with a plurality of axial notches 11 on the inwall of unilateral bearing retainer 3; Groove 11 is semicircle with the cross section of flange 10.When unilateral bearing retainer 3 is installed, its semicircular flanges 10 embeds in the semi-circular recesses 11 of bearing inner race 4, its effect is that unilateral bearing retainer 3 and bearing inner race 4 are combined into one, making does not have relative movement between the two, thereby can allow the 6 pairs of needle rollers 2 of sheetmetal spring on the unilateral bearing retainer 3 apply a more constant active force, needle roller 2 is remained on its working position.

The two ends of bearing outer ring 1 are fixed with respectively end cap 5.End cap 5 adopts interference fit on bearing outer ring 1, has substituted the flanging technique of the bearing outer ring of thin plate punching of the prior art.

Working principle of the present utility model is as follows: when bearing outer ring 1 and bearing inner race 4 postive direction relative movement, to wedge shape space 9 small ends, needle roller 2 enters engagement, bearing outer ring 1 and bearing inner race 4 wedgings, carry-over moment with needle roller 2 bands; When bearing outer ring 1 and bearing inner race 4 relative movement in the other direction, needle roller 2 bands to be held greatly to wedge shape space 9, needle roller 2 withdraws from engagement automatically, and bearing outer ring 1 is in releasing orientation with bearing inner race 4, and carry-over moment does not only play the effect of rolling bearing.

Claims

1. unidirectional needle bearing with supporting, comprise bearing outer ring (1), needle roller (2), unilateral bearing retainer (3) and bearing inner race (4), described unilateral bearing retainer (3) is positioned between described bearing outer ring (1) and the described bearing inner race (4), a plurality of described needle rollers (2) are distributed on the circumference of described unilateral bearing retainer (3), it is characterized in that: described bearing outer ring (1) is made by steel pipe, be evenly equipped with the wedge slot that circumferentially arrange in the same way on a plurality of edges on the outer wall of described bearing inner race (4), the quantity of described wedge slot is identical with the quantity of described needle roller (2), form a plurality of wedge shape spaces (9) between the inwall of a plurality of described wedge slots and described bearing outer ring (1), in each described wedge shape space (9) a described needle roller (2) is installed, is fixed with the sheetmetal spring (6) of each described needle roller (2) being pushed to small end from the large end of corresponding described wedge shape space (9) on the described unilateral bearing retainer (3); Be furnished with respectively block bearing retainer (7) in the raceway in the outside, the axial two ends of described unilateral bearing retainer (3), be evenly equipped with a plurality of rollers (8) on the circumference of each described block bearing retainer (7).

2. according to the unidirectional needle bearing of band supporting claimed in claim 1, it is characterized in that: described bearing outer ring (1) adopts the grinding of GCr15 seamless steel pipe to form, and adopts integral quenching heat treatment.

3. the unidirectional needle bearing that supports according to band claimed in claim 1, it is characterized in that: be evenly equipped with a plurality of axial notches (11) on the outer wall of described bearing inner race (4), be provided with the flange (10) that matches with described a plurality of axial notches (11) on the inwall of described unilateral bearing retainer (3).

4. according to the unidirectional needle bearing of band supporting claimed in claim 3, it is characterized in that: described groove (11) is semicircle with the cross section of described flange (10).

5. according to the unidirectional needle bearing of band supporting claimed in claim 1, it is characterized in that: the two ends of described bearing outer ring (1) are fixed with respectively end cap (5).

6. according to the unidirectional needle bearing of band supporting claimed in claim 5, it is characterized in that: described end cap (5) adopts interference fit on described bearing outer ring (1).