CN204755586U - Bearing - Google Patents

Abstract

The utility model discloses a bearing, including outer lane, inner circle and kingpin, the coaxial outer lane of arranging in of inner circle, be provided with the raceway on the interior anchor ring of outer lane, the raceway on be abound with a plurality of kingpins, the raceway on still be provided with wear -resisting plastic layer, the inner circle be oval, just the outer periphery middle part of inner circle is provided with round arc arch, the confession has been seted up in the correspondence of needle roller middle part the annular groove of the protruding embedding of arc. Through adopting the structure mentioned above, the utility model provides a simpler and better bearing of bearing capacity of structure.

Description

A kind of needle bearing

Technical field

The utility model relates to a kind of needle bearing.

Background technique

At present; needle bearing is a kind of conventional bearing; its structure is except outer ring, inner ring and needle roller; usually also retainer is included; the effect of retainer is effective stationary positioned needle roller, but the application of retainer not only makes, and the overall structure of bearing becomes complicated, cost of production increases, but also makes bearing cannot place needle roller more in limited installing space; thus affect the integrated carrying ability of bearing, make it cannot be applied in the occasion of heavy duty.

Summary of the invention

For the deficiencies in the prior art, the utility model provides the simpler and better needle bearing of bearing capacity of a kind of structure.

For achieving the above object, the utility model provides a kind of needle bearing, include outer ring, inner ring and needle roller, described inner ring is coaxially placed in outer ring, and the inner ring surface of described outer ring is provided with raceway, and described raceway has been abound with some needle rollers, described raceway is also provided with the Wear-resistant plastic bed of material, described inner ring is oval, and is provided with a circle arc convex in the middle part of the outer peripheral surface of described inner ring, and the middle part correspondence of described needle roller offers the annular groove embedded for described arc convex.

The beneficial effects of the utility model are: adopt said structure, because the utility model eliminates the use of retainer, make into arrange arc convex on inner ring, and correspondence arranges the annular groove matched with described arc convex and replaces on needle roller, therefore structure becomes more simple, and cost of production significantly reduces, and people also can be made spatially to place more needle roller at limited raceway simultaneously, thus greatly increase the integrated carrying ability of bearing, the occasions such as heavy duty can be useful in.In addition, described inner ring is arranged to ellipse, then, when can be convenient to assembling, the arc convex on inner ring is fitted on the annular groove of needle roller more easily; And the Wear-resistant plastic bed of material is set on described raceway, then can extend the working life of bearing further.

The utility model can be set to described outer ring inner ring surface further and also all offer draw-in groove in the axial both sides of raceway, and described draw-in groove is fixed with dust ring, and described dust ring is formed with the axial end of inner ring and abuts.Adopt said structure, arrange dust ring and can play dustproof effect effectively, and described dust ring and the axial end of inner ring are formed abut, then internal circle forms stationary positioned further, makes bearing operation more reliable and more stable.

The utility model also can be set to the described Wear-resistant plastic bed of material further and be preferably polytetrafluorethylecoatings coatings.

Accompanying drawing explanation

Fig. 1 is structural representation of the present utility model.

Embodiment

Give a kind of needle bearing as shown in Figure 1, include outer ring 1, inner ring 2 and needle roller 3, described inner ring 2 is coaxially placed in outer ring 1, the inner ring surface of described outer ring 1 is provided with raceway 11, described raceway 11 some needle rollers 3 have been abound with, described raceway 11 is also provided with the Wear-resistant plastic bed of material 12, and the described Wear-resistant plastic bed of material 12 is preferably polytetrafluorethylecoatings coatings.Described inner ring 2 is oval, and is provided with a circle arc convex 21 in the middle part of the outer peripheral surface of described inner ring 2, and the middle part correspondence of described needle roller 3 offers the annular groove 31 embedded for described arc convex 21.Described outer ring 1 inner ring surface also all offers draw-in groove 13 in the axial both sides of raceway 11, and described draw-in groove 13 is fixed with dust ring 4, and described dust ring 4 is formed with the axial end 22 of inner ring 2 and abuts.

Adopt said structure, because the utility model eliminates the use of retainer, make into arrange arc convex 21 on inner ring 2, and correspondence arranges the annular groove 31 matched with described arc convex 21 and replaces on needle roller 3, therefore structure becomes more simple, and cost of production significantly reduces, and people also can be made spatially to place more needle roller 3 at limited raceway 11 simultaneously, thus greatly increase the integrated carrying ability of bearing, the occasions such as heavy duty can be useful in.

Claims (3)

1. a needle bearing, include outer ring, inner ring and needle roller, described inner ring is coaxially placed in outer ring, the inner ring surface of described outer ring is provided with raceway, described raceway has been abound with some needle rollers, has it is characterized in that: described raceway is also provided with the Wear-resistant plastic bed of material, described inner ring is oval, and in the middle part of the outer peripheral surface of described inner ring, being provided with a circle arc convex, the middle part correspondence of described needle roller offers the annular groove embedded for described arc convex.

2. a kind of needle bearing according to claim 1, is characterized in that: described outer ring inner ring surface also all offers draw-in groove in the axial both sides of raceway, and described draw-in groove is fixed with dust ring, and described dust ring is formed with the axial end of inner ring and abuts.

3. a kind of needle bearing according to claim 1, is characterized in that: the described Wear-resistant plastic bed of material is polytetrafluorethylecoatings coatings.