CN201771961U

CN201771961U - Taper roller bearing

Info

Publication number: CN201771961U
Application number: CN2010205347171U
Authority: CN
Inventors: 屈平; 郭静瑜; 蔡旭东
Original assignee: Changshu Great Wall Bearing Co Ltd
Current assignee: Changshu Great Wall Bearing Co Ltd
Priority date: 2010-09-16
Filing date: 2010-09-16
Publication date: 2011-03-23
Anticipated expiration: 2020-09-16

Abstract

The utility model discloses a taper roller bearing; a floating retaining ring is arranged on an outer ring at a large diameter end position of an outer ring raceway of the taper roller bearing; a flange portion projecting out of the inner ring raceway is formed on a small diameter end of the inner ring raceway; a large diameter end position of the inner ring raceway is not projecting out of the inner ring raceway; when the bearing undergoes a reversed axial force, a large end face of a taper roller is contacted with a floating retaining ring and a small end face of the taper roller is contacted with the flange portion on the inner ring; the reversed axial force is transferred by the flange portion on the inner ring, the taper roller and the floating retaining ring; and the bearing will not be disengaged; accordingly, a taper roller bearing can bear a bidirectional axial force so as to obtain the same effect without using two taper roller bearings. The taper roller bearing is normally used without disengagement and installation space of the taper roller bearing is saved.

Description

Tapered roller bearing

Technical field

The utility model relates to a kind of bearing, particularly a kind of can be under the effect that bi-directional axial power is arranged the tapered roller bearing of proper functioning.

Background technique

Tapered roller bearing is widely used in all kinds of machineries, has especially more widely to use in automotive axle, wheel hub, and tapered roller bearing has can bear the axial combined loading in footpath, and bearing capacity is bigger.

As shown in Figure 1, be the structural representation of tapered roller, form by outer ring 1, inner ring 2, tapered roller 3 and retainer 4.Wherein there is the inner ring raceway 5 of a taper outer ring 1, inner ring 2 has the outer ring raceway 6 of a taper, two ends on the inner ring raceway have a little flange portion 9 and a big flange portion 10 respectively, the large end face 7 of tapered roller is that a band protrudes arc surface, the face 8 of the big flange portion 10 of inner ring is the faces with a concave circular arc, when bearing working, the large end face 7 of tapered roller contacts with the face 8 of the big flange portion 10 of inner ring.

When bearing working, closely contact with the raceway of outer ring, inner ring in order to guarantee tapered roller, must apply a pretightening force to bearing, this pretightening force must act on respectively on the large end face 12 of the large end face 11 of bearing outer ring and inner ring.When bearing was received reverse axial force, bearing can be thrown off, and influenced the use of bearing.Therefore, bearing can only bear unidirectional axial force, when needs bear bi-directional axial power, should use two tapered roller bearings to install relatively, but the bearing occupation space is just bigger like this.

In a few thing place, the most of the time bearing is the axial force of bearing direction, but can be subjected to a reverse axial force at extremely short time period middle (center) bearing sometimes, because the constraint in Bearing Installation space, two bearings can not be installed simultaneously, like this, general tapered roller bearing is with regard to improper this occasion.

For example, China Patent No. is the patent of ZL200510007915.6, and its objective is provides a kind of foozle that can reduce rotating torques and allow tapered roller bearing to a certain degree bearing.Its structure comprises outer race, inner race, tapered roller and retainer, and the big or small lip part that forms in two ends of inner race.But such structure such as above-mentioned similar can't resolve the problem that bearing bears bi-directional axial power.

The model utility content

Technical problem to be solved in the utility model provides a kind of tapered roller bearing that can bear bi-directional axial power.

In order to realize above-mentioned technical purpose, the technical solution of the utility model is: a kind of tapered roller bearing, comprise outer ring, inner ring, tapered roller and retainer, tapered roller is arranged between outer ring raceway and the inner ring raceway, retainer is arranged on large end face, the small end face place of tapered roller, on the smaller diameter end of inner ring raceway, be formed with the flange portion of outstanding inner ring raceway, be formed with flange surface on the described flange portion, described flange surface is relative with the small end face of described tapered roller, the not outstanding raceway in the larger diameter end place of inner ring raceway; Larger diameter end place at outer ring raceway, the outer ring is provided with unsteady back-up ring, be formed with the extension of outstanding outer ring raceway on the described unsteady back-up ring, be formed with on the extension of described unsteady back-up ring and stretch out end face, the described end face that stretches out is relative with the large end face of described tapered roller; Between the small end face of described flange surface and tapered roller and stretch out between the large end face of end face and tapered roller and leave the gap.

Stretch out end face can form lubricant film when contacting with the large end face of tapered roller for what form on the extension that guarantees described unsteady back-up ring, the large end face of described tapered roller is outstanding arc surface, and the described end face that stretches out is taper or arc surface.

Between the small end face of described flange surface and tapered roller and to stretch out the gap sum that leaves between the large end face of end face and tapered roller be 0.04～0.2mm.

Be formed with endoporus on the extension of described unsteady back-up ring, in order to guarantee tapered roller bearing sequence of sanqu songs within a particular musical mode not in transportation process, the size at the minimum dimension place of endoporus is littler in the size of big end than retainer.

In order to guarantee tapered roller bearing sequence of sanqu songs within a particular musical mode not in transportation process, also can be in the large end face end of tapered roller, outer ring raceway is provided with groove, and at described groove, unsteady back-up ring is provided with the convex tendon with the groove interference fit.

Tapered roller bearing of the present utility model is under normal carrying, the footpath axial force is transmitted by outer ring raceway and inner ring raceway, flange surface on the inner ring flange portion and tapered roller, and stretching out of tapered roller large end face and unsteady back-up ring left the gap and do not contacted between the end face.

When bearing is subjected to reverse axial force in short-term, the end face that stretches out of the large end face of tapered roller and unsteady back-up ring contacts, the small end face of tapered roller contacts with flange surface on the inner ring upper flange part, oppositely axial force is transmitted by the flange portion on the inner ring, tapered roller, the back-up ring that floats, and bearing can not thrown off.

Tapered roller bearing of the present utility model adopts simple structure, make a tapered roller bearing can bear bi-directional axial power, when producing two-way axial force, need not to use two tapered roller bearings just can obtain same effect, avoided the disengagement of tapered roller bearing, influence the use of tapered roller bearing, save the space that tapered roller bearing is installed.

Description of drawings

Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.

Fig. 1 is the structural representation of the tapered roller bearing of prior art.

Fig. 2 is the structural representation of tapered roller bearing of the present utility model.

Fig. 3 is the unsteady back-up ring of the utility model tapered roller bearing and the structural representation of outer ring.

Embodiment

As shown in Figure 2, a kind of tapered roller bearing, comprise outer ring a1, inner ring a2, tapered roller a3 and retainer a4, tapered roller a3 is arranged between outer ring raceway a6 and the inner ring raceway a7, and retainer a4 is arranged on large end face a11, the small end face a10 place of tapered roller a3.

On the smaller diameter end of inner ring raceway a7, be formed with the flange portion a8 of outstanding inner ring raceway a7, be formed with flange surface a9 on the described flange portion a8, described flange surface a9 is relative with the small end face a10 of described tapered roller a3, the not outstanding inner ring raceway a7 in the larger diameter end place of inner ring raceway a7.

Larger diameter end place at outer ring raceway a6, outer ring a1 is provided with the back-up ring a5 that floats, be formed with the extension of outstanding outer ring raceway a6 on the described unsteady back-up ring a5, be formed with on the extension a17 of described unsteady back-up ring a5 and stretch out end face a12, the described end face a12 that stretches out is relative with the large end face a11 of described tapered roller a3.

Between the small end face a10 of described flange surface a9 and tapered roller a3 and stretch out between the large end face a11 of end face a12 and tapered roller a3 and leave the gap.

Normal carrying down, the footpath axial force is transmitted by outer ring raceway a6 and inner ring raceway a7, flange surface a9 and tapered roller a3 on the inner ring a2 flange portion a8, and stretching out of tapered roller a3 large end face a11 and unsteady back-up ring a5 leave the gap between the end face a12 and do not contact, and the gap sum that leaves is 0.04～0.2mm.

When bearing is subjected to reverse axial force in short-term, the end face a12 that stretches out of the large end face a11 of tapered roller a3 and unsteady back-up ring a5 contacts, the small end face a10 of tapered roller a3 contacts with flange surface a9 on the inner ring a2 upper flange part a8, oppositely axial force is transmitted by the flange portion a8 on the inner ring a2, tapered roller a3, the back-up ring a5 that floats, and bearing can not thrown off.

For the extension a17 that guarantees described unsteady back-up ring a5 goes up stretching out end face a12 can form lubricant film when contacting with the large end face a11 of tapered roller a3 of forming, the large end face a11 of described tapered roller a3 is outstanding arc surface, and the described end face a12 that stretches out is taper or arc surface.

As shown in Figure 3, in order to guarantee tapered roller bearing sequence of sanqu songs within a particular musical mode not in transportation process, the size of the a15 of minimum dimension place that the extension a17 of described unsteady back-up ring a5 goes up the endoporus that forms is littler in the size of big end a16 than retainer a4.Also can be in the large end face a11 end of tapered roller a3, outer ring raceway a6 is provided with groove a13, at described groove a13 place, the back-up ring a5 that floats is provided with the convex tendon a14 with groove a13 interference fit, the physical dimension of convex tendon a14 is slightly larger than the notch size of groove a13, when assembling rise by heat outer ring or pressure mode form resiliently deformable convex tendon a14 entered in the groove a13 because the relation of size interference makes the back-up ring that floats not take off from the outer ring.Can certainly adopt glue bonding float back-up ring a5 and outer ring a1.

The foregoing description limits the utility model never in any form, and every employing is equal to replaces or technological scheme that the mode of equivalent transformation obtains all drops in the protection domain of the present utility model.

Claims

1. tapered roller bearing, comprise outer ring (a1), inner ring (a2), tapered roller (a3) and retainer (a4), tapered roller (a3) is arranged between outer ring raceway (a1) and the inner ring raceway (a2), retainer (a4) is arranged on the large end face (a11) of tapered roller (a3), small end face (a10) is located, it is characterized in that: the flange portion (a8) that on the smaller diameter end of inner ring raceway (a7), is formed with outstanding inner ring raceway (a7), be formed with flange surface (a9) on the described flange portion (a8), described flange surface (a9) is relative with the small end face (a10) of described tapered roller (a3), the not outstanding inner ring raceway (a7) in the larger diameter end place of inner ring raceway (a7); Larger diameter end place at outer ring raceway (a6), outer ring (a1) is provided with unsteady back-up ring (a5), be formed with the extension (a17) of outstanding outer ring raceway (a6) on the described unsteady back-up ring (a5), be formed with on the extension (a17) of described unsteady back-up ring (a5) and stretch out end face (a12), the described end face (a12) that stretches out is relative with the large end face (a11) of described tapered roller (a3); Between the small end face (a10) of described flange surface (a9) and tapered roller (a3) and stretch out between the large end face (a11) of end face (a12) and tapered roller (a3) and leave the gap.

2. tapered roller bearing according to claim 1 is characterized in that: the large end face (a11) of described tapered roller (a3) is outstanding arc surface, and the described end face (a12) that stretches out is taper or arc surface.

3. tapered roller bearing according to claim 1 is characterized in that: between the small end face (a10) of described flange surface (a9) and tapered roller (a3) and to stretch out the gap sum that leaves between the large end face (a11) of end face (a12) and tapered roller (a3) be 0.04～0.2mm.

4. tapered roller bearing according to claim 1 is characterized in that: be formed with endoporus on the extension (a17) of described unsteady back-up ring (a5), the size at the minimum dimension place (a15) of endoporus is littler in the size of big end (a16) than retainer (a4).

5. tapered roller bearing according to claim 1, it is characterized in that: in large end face (a11) end of tapered roller (a3), outer ring raceway (a6) is provided with groove (a13), (a13) locates at described groove, and the back-up ring (a5) that floats is provided with the convex tendon (a14) with groove (a13) interference fit.