CN203374660U

CN203374660U - Tapered roller bearing

Info

Publication number: CN203374660U
Application number: CN201320346589.1U
Authority: CN
Inventors: 神田裕
Original assignee: NSK Ltd
Current assignee: NSK Ltd
Priority date: 2013-06-14
Filing date: 2013-06-14
Publication date: 2014-01-01
Anticipated expiration: 2023-06-14

Abstract

The utility model provides a tapered roller bearing which works through the rotation of an outer ring. The tapered roller bearing comprises an inner ring of which the peripheral surface is provided with a tapered inner ring roller path, an outer ring of which the inner peripheral surface is provided with a tapered outer ring roller path, and a plurality of tapered rollers arranged between the inner ring roller path and the outer ring roller path in a freely rolling form. The tapered roller bearing is characterized in that under the condition that the radial length size of the axial center part of the inner ring is used as the thickness Hi of the inner ring and the radial length size of the axial center part of the outer ring is used as the thickness Ho of the outer ring, the following relations are satisfied: Hi is equal to or more than 25mm and less than 42mm, and Ho is equal to or more than 18mm and less than 28mm.

Description

Tapered roller bearing

Technical field

The utility model relates to roller bearing, relate in particular to the technology that can be applicable to using in tapered roller bearing, this tapered roller bearing by outer ring, rotate in the wheel that uses the dump truck heavier at vehicle weight, mine/build dump truck, wheel loader etc. for machine and the planetary pinion of the mechanical use of general industry etc. in.

Background technique

In the past, as the roller bearing with respect to suspension arrangement wheel of heavier vehicle with mode taking the weight of freely of rotation, and preferably used the tapered roller bearing that load capacity is large and rigidity is high.But, in this tapered roller bearing, the load change produced according to the movement along with rolling element etc., relative rotation can occur in it, and creep occurs.If produce this creep, on the surface of axle, can wear away, and the abrasion powder on surface can enter into bearing inside, becomes the reason of peeling off in advance.In the roller bearing of putting down in writing at patent documentation 1, by the thickness that makes inner ring and outer ring, increase, prevent creep.

Patent documentation 1: TOHKEMY 2010-025155 communique

The model utility content

But, in the roller bearing of putting down in writing at patent documentation 1, because the thickness that makes inner ring and outer ring increases, so roller diameter significantly diminishes, have the problem that makes bearing life shorten or bearing rigidity is reduced.Therefore, when using this bearing, in order to meet necessary life-span, necessary rigidity, need to increase the size of bearing, thereby have the problem of the manufacture cost rising that makes device integral body.The utility model is made in view of above-mentioned various situations.Its purpose is, providing a kind of can not suppress roller bearing creep, that rotate to use by outer ring in the mode that reduces bearing rigidity.

Above-mentioned purpose of the present utility model realizes by following structure.

(1) a kind of tapered roller bearing, it has the inner ring of the inner ring raceway that has taper on outer circumferential face, the outer ring that there is the outer ring raceway of taper on inner peripheral surface, and rolling is located at a plurality of tapered rollers between described inner ring raceway and described outer ring raceway freely, and this tapered roller bearing rotates to use by outer ring, it is characterized in that, in the radial length size at the axial central part place using described inner ring as inner ring thickness Hi, and using the radial length size at the axial central part place of described outer ring in the situation of outer ring thickness Ho, 25mm≤Hi<42mm, and 18mm≤Ho<28mm.

If further stipulate the relation of Hi and Ho, can be preferably respectively the technological scheme shown in following (2)～(5).

(2) tapered roller bearing is characterised in that, 26mm≤Hi<27mm, and 18mm≤Ho<20mm.

(3) tapered roller bearing is characterised in that, 28mm≤Hi<29mm, and 18mm≤Ho<19mm.

(4) tapered roller bearing is characterised in that, 29mm≤Hi<31mm, and 20mm≤Ho<22mm.

(5) tapered roller bearing is characterised in that, 41mm≤Hi<42mm, and 27mm≤Ho<28mm.

In addition, be made as tapered roller diameter Dw in 1/2 of the large footpath size by tapered roller and path size sum, and the axial length of tapered roller is made as in the situation of Lw, inner ring thickness Hi based in the technological scheme of above-mentioned (2)～(5) and the number range of outer ring thickness Ho, tapered roller diameter Dw and tapered roller diameter Lw preferably are set as following number range.If below set in this wise, can further improve the rigidity of tapered roller self, therefore can suppress the distortion of inner ring, can also suppress creep.

(6) above-mentioned (2) described tapered roller bearing, is characterized in that, 25mm≤Dw<26mm, and 63mm≤Lw<65mm.

(7) above-mentioned (3) described tapered roller bearing, is characterized in that, 27mm≤Dw<28mm, and 68mm≤Lw<70mm.

(8) above-mentioned (4) described tapered roller bearing, is characterized in that, 30mm≤Dw<31mm, and 76mm≤Lw<78mm.

(9) above-mentioned (5) described tapered roller bearing, is characterized in that, 40mm≤Dw<41mm, and 99mm≤Lw<101mm.

(10) the described tapered roller bearing of any one in above-mentioned (1)～(9), can preferably adopt in wheel of truck.

Tapered roller bearing of the present utility model is by with existing bearing, comparing and make the inner ring thickening, and makes basic rated static load become large, and the rigidity of inner ring is improved.Therefore, make along with rolling element diminishes by the inner ring resiliently deformable produced, and can suppress creep, and can be produced with low cost.

The accompanying drawing explanation

Fig. 1 means the sectional view of the tapered roller bearing of mode of execution of the present utility model.

Embodiment

Tapered roller bearing 1 of the present utility model has inner ring 2, outer ring 3, a plurality of tapered roller 4 and retainer 5.Inner ring 2 has the inner ring raceway 2a of taper on outer circumferential face, has path side protuberance 2b and large footpath side protuberance 2c in the both sides of inner ring raceway 2a.Outer ring 3 has the outer ring raceway 3a of taper on inner peripheral surface.A plurality of tapered rollers 4 are located between inner ring raceway 2a and outer ring raceway 3a in the mode of rolling freely by retainer 5.

In addition, using the inner ring internal diameter as d, on basis using the outer ring external diameter as D, using the pitch diameter at the central part place of the roller length along axis x of each tapered roller 4 as dm, the point that the vertical line v that will vertically extend with respect to this axis x in the position from pitch diameter and outer ring raceway 3a intersect, the size that the footpath of inner ring 2 makes progress is as outer ring thickness Ho, the point that the vertical line v that will vertically extend with respect to this axis x in the position from pitch diameter and inner ring raceway 2a intersect, the size that the footpath of inner ring 2 makes progress is as inner ring thickness Hi, using the kernel of section diameter of tapered roller bearing as dh, using the length of tapered roller 4 as the tapered roller length L, using the large footpath size of tapered roller and path size sum 1/2 as tapered roller diameter Dw, distance between adjacent tapered roller 4 is as S.In addition, the wrapping angle α of tapered roller 4 is applicable to the scope of known tapered roller bearing.

Claims

1. a tapered roller bearing, it has the inner ring of the inner ring raceway that has taper on outer circumferential face, on inner peripheral surface, have taper outer ring raceway outer ring and roll and be located at freely a plurality of tapered rollers between described inner ring raceway and described outer ring raceway, and this tapered roller bearing rotates to use by outer ring, it is characterized in that

In the radial length size at the axial central part place using described inner ring as inner ring thickness Hi, and using the radial length size at the axial central part place of described outer ring in the situation of outer ring thickness Ho, 25mm≤Hi<42mm, and 18mm≤Ho<28mm.

2. tapered roller bearing according to claim 1, is characterized in that, 26mm≤Hi<27mm, and 18mm≤Ho<20mm.

3. tapered roller bearing according to claim 1, is characterized in that, 28mm≤Hi<29mm, and 18mm≤Ho<19mm.

4. tapered roller bearing according to claim 1, is characterized in that, 29mm≤Hi<31mm, and 20mm≤Ho<22mm.

5. tapered roller bearing according to claim 1, is characterized in that, 41mm≤Hi<42mm, and 27mm≤Ho<28mm.

6. tapered roller bearing according to claim 2, is characterized in that, tapered roller diameter Dw is more than 25mm and not enough 26mm, and the axial length L w of tapered roller is more than 63mm and not enough 65mm.

7. tapered roller bearing according to claim 3, is characterized in that, tapered roller diameter Dw is more than 27mm and not enough 28mm, and the axial length L w of tapered roller is more than 68mm and not enough 70mm.

8. tapered roller bearing according to claim 4, is characterized in that, tapered roller diameter Dw is more than 30mm and not enough 31mm, and the axial length L w of tapered roller is more than 76mm and not enough 78mm.

9. tapered roller bearing according to claim 5, is characterized in that, tapered roller diameter Dw is more than 40mm and not enough 41mm, and the axial length L w of tapered roller is more than 99mm and not enough 101mm.