CN1040664A - Ball bearing - Google Patents

Abstract

Ball bearing has interior ring, and a pair of outer shroud, ball are put between the inside and outside ring, and it is spaced-apart that retainer is used for a ball.Each outer shroud have straight portion and with the integrant curved portion of straight portion.Outer shroud has the opposed end face that overlap joint gets up.Curved portion has and the corresponding to curvature of ball profile.The curved portion of each outer shroud contact with the sealed member of making by elastic material and on its whole circumference length sealed member have with interior environmental protection and hold the flange portion that contacts of sealing.

Description

Ball bearing

The present invention relates to ball bearing.

Prior art ball bearing for example radial ball bearing has an excircle to have the interior ring of bal guide, an inner circumference has the outer shroud of bal guide, in the guide groove in many balls place on ring and the outer shroud and one be used for ball retainer spaced apart from each other on circumference.

Because the diameter of lapping machine is unrestricted, thus can be by the bal guide on the excircle of ring in the ball bearing that uses lapping machine grinding the prior art.But, accurately grind the bal guide of the inner circumference of outer shroud, under the less situation of bearing size, be extremely difficult especially, this is because in order to grind this guide groove, lapping machine must have the diameter littler than the internal diameter of outer shroud.Another shortcoming is that the such lapping machine than minor diameter with shorter circumferential length certainly will wear and tear comparatively fast.

Assemble this ball bearing, outer shroud need move to eccentric position with respect to interior ring, and the side between two rings forms the gap, and ball enters this gap, and outer shroud and interior ring are aimed at, and retainer is installed at last, makes ball spaced-apart.The installation step of this complexity has increased manufacture cost.

The ball bearing that the purpose of this invention is to provide has been eliminated above-mentioned shortcoming, and having saved needs to grind the operation of ball bearing outer shroud, and can put into ball at an easy rate.

According to the present invention, outer shroud can create easily by punch process.Assemble this bearing, the ball that is supported by retainer is placed in the bal guide of interior ring, and a pair of outer shroud is installed from both sides respectively.Thereby, comparing with common ball bearing, the present invention can install ball easy as can.

Further feature of the present invention and purpose will be become apparent by description with reference to the accompanying drawings, wherein:

Fig. 1 is first embodiment's a vertical cross-section side view;

Fig. 2 is the amplification vertical cross-section side view of first embodiment's a outer shroud; And

Fig. 3 is second embodiment's a amplification sectional view.

Interior ring 1 is to be made by the cutting steel pipe that gives measured length, and grinds its both ends of the surface and inner and outer surface with lathe or similar approach.Use lapping machine on the excircle of interior ring, to process two row's bal guides 2.

Two sides of ring in a pair of plastic annular retainer 3 is contained in respectively, each retainer have a plurality of equal angles groove 5 at interval.

Ball 4 is placed in the corresponding grooves 5 of retainer 3, and makes in its guide groove groove 2 that embeds interior ring.

A pair of outer shroud 7 by stamped sheet metal for example the punching press steel plate make.

As shown in Figure 2, outer shroud 7 has flat segments aBasically the arcuate segment that has the quadrant cross section bHas its crooked inner circumference edge on the arcuate segment, so that adapt to the profile phase of ball 4.

The flat segments of each outer shroud 7 aOn its outer periphery, has eccentric groove 8.

Numeral 10 is illustrated in the flat segments of outer shroud 7 aEnd face form resin mold after being docked to together around outer shroud 7.

In most preferred embodiment, the pulley shape that resin mold 10 is V-shaped, but also can be the carrying roller shape that is suitable for flat belt, gear or is suitable for the roller of crawler belt.In most preferred embodiment, mould 10 and outer shroud 7 thereof are suitable for around the axle rotation in the ring 1 in being installed in.But mould 10 also can constitute the bearing that allows axle rotation in interior ring 1.

Each outer shroud 7 has one by the elastic material annular seal piece 11 made of rubber for example, and the sealing block snap-on is at the arcuate segment of outer shroud bOn.Each sealing block 11 has the flange 12 that the outer circumference with interior ring 1 keeps in touch along its inner rim.

In most preferred embodiment, interior ring 1 is shaped on annular ditch groove in its outer periphery, and annular ditch groove is laid flange portion 12.But also can not have annular ditch groove.

Fig. 3 represents second embodiment, it and first embodiment's difference only be sealing block 11 ', sealing block 11 ' by soft and rubber-like material for example rubber make, it is by toasting the curved section attached to outer shroud 7 bOuter periphery on.Sealing block 11 ' on its whole inner edge, have and the outer periphery of interior ring 1 keep the flange 12 of Elastic Contact '.

Second embodiment also provides a lid 14, and lid 14 is in abutting connection with the outer end of interior ring 1, to block earth or other foreign matter.The 3rd flange 13 that seal ring 11 ' have and the internal surface of lid 14 keep sealing to contact.Numeral 15 represent 0 shape ring, be contained in cover 14 and the outer end of interior ring 1 between 0 shape encircle and prevent entering of other materials such as sealing.

In this embodiment, the outer periphery of outer shroud 7 be shaped on annular groove 8 ', the mould 10 that annular groove 8 ' placement is formed from a resin, thus make 10 one-tenth of outer shroud 7 and moulds as a whole.

Can make sealing block at an easy rate according to the structure of ball bearing of the present invention around outer shroud 7.

Claims (5)

1, ball bearing comprises: ring in, be shaped on two row's bal guides on the excircle of interior ring, many balls are placed in the described guide groove, ball remain on the appropriate location retainer and by punching press make and be enclosed within the ring on cover corresponding two row balls a pair of outer shroud, outer shroud has the inner that overlaps, each outer shroud is held within it to have straight part and has curved portion at the other end, and this sectional shape that outer shroud has is consistent with the profile of ball basically.

2, according to the ball bearing of claim 1, wherein said each outer shroud is shaped on eccentric groove on its outer periphery, is convenient to and described eccentric groove engagement around the resin mold of outer shroud setting, and described like this resin mold becomes as a whole with outer shroud.

3, according to the ball bearing of claim 2, also comprise the seal arrangement of making by elastic material, seal arrangement is fixed on the annular portion of outer shroud, and each integral sealing means that forms on whole circumference length has first flange portion that keeps sealing to contact with the excircle of interior ring.

4, according to the ball bearing of claim 3 also be included in its two ends be fixedly fitted in lid arrangement on the ring, the seal arrangement that forms on whole circumference length has second flange portion that keeps sealing to contact with described device.

5, according to the ball bearing of claim 3, wherein said seal arrangement is fixed to described curved portion by baking.