CN203770390U - Thrust bearing - Google Patents

Abstract

The utility model relates to a thrust bearing. The thrust bearing is characterized by comprising a pair of ring-shaped rolling channel rings, a plurality of rolling bodies and a holding frame; the plurality of rolling bodies are capable of relatively moving in the pair of rolling channel rings; the holding frame is used for holding the plurality of rolling bodies at equal intervals; a guide part is arranged at the end part of the inner circumference side of the holding frame and protruded to one rolling channel ring along the direction of a rotation shaft; a protrusion part is arranged at the end part of the outer circumference side of the holding frame and protruded in the radial direction of the thrust bearing; the formation of the thrust bearing is characterized in that the ratio of the protrusion amount of the guide part from the inner diameter of the bearing to the inner diameter of the rolling channel rings is X which is greater than or equal to 0.3% and less than or equal to 5.0%, and the ratio of the protrusion amount of the protrusion part from the outer diameter of the bearing to the outer diameter of the rolling channel rings is Y which is greater than or equal to 0.1% and less than or equal to 3.0%.

Description

Thrust-bearing

Technical field

The utility model relates to the thrust-bearing for High Rotation Speed etc.

Background technique

From in the past, the performances such as the reduction of the slip resistance under High Rotation Speed of thrust-bearing, the raising of rotational stabilization and the raising of lubricity improve just becomes problem.

Summary of the invention

In order to solve above-mentioned problem, the utility model provides a kind of thrust-bearing, and it has: make running shaft be configured in coaxial a pair of circular raceway circle, the rolling element multiple cylindraceous of reciprocally relative movement between a pair of described raceway circle, with the circular retainer that multiple described rolling elements are equally spaced kept, on the end, inner circumferential side of described retainer, there is raceway circle towards one along the outstanding guide portion of described running shaft direction, on the outer circumferential side end of described retainer, there is the radially outstanding protuberance from described thrust-bearing, and, this thrust-bearing is formed as, the overhang from bearing bore diameter of described guide portion is 0.3%≤X≤5.0% with respect to the ratio X of described raceway circle internal diameter, the overhang from bearing outside diameter of described protuberance is 0.1%≤Y≤3.0% with respect to the ratio Y of described raceway circle external diameter, thus, can reduce the slip resistance under High Rotation Speed of thrust-bearing, improve rotational stabilization, and raising lubricity.

Brief description of the drawings

Fig. 1 is the sectional view that represents thrust-bearing of the present utility model.

Embodiment

The thrust-bearing 1 of present embodiment has: make running shaft be configured in coaxial a pair of circular raceway circle 2; The rolling element 3 multiple cylindraceous of reciprocally relative movement between a pair of above-mentioned raceway circle; With the circular retainer 4 that multiple above-mentioned rolling elements are equally spaced kept.Above-mentioned raceway circle 2 is toroidal, on the axial surface of rotation, is formed with rolling surface.Above-mentioned retainer 4 has multiple pockets hole that rolling element 3 is accommodated, on end, inner circumferential side, there is the guide portion 4a that gives prominence to and engage with raceway circle inner peripheral surface along above-mentioned running shaft direction towards the raceway circle of one side, on the outer circumferential side end of above-mentioned retainer, have with above-mentioned thrust-bearing radially compared with outstanding protuberance 4b.And, thrust-bearing 1 is formed as, the overhang a from bearing bore diameter of guide sections is 0.3%≤X≤5.0% with respect to the ratio X of above-mentioned raceway circle inner diameter D 1, the overhang b from bearing outside diameter of above-mentioned protuberance is 0.1%≤Y≤3.0% with respect to the ratio Y of above-mentioned raceway circle outer diameter D 2, thus, in the time of thrust-bearing High Rotation Speed, the lubricity of slip resistance, rotational stabilization and thrust-bearing is optimised, and can improve the performance of bearing.In addition, in the utility model, in bearing bore diameter is 500mm～3200mm and the bearing outside diameter using scope that is 665mm～3400mm, shows obvious performance and improve.And, by the oiling agent feed path that arranges from the internal side diameter of retainer towards rolling surface side and guide surface outer surface side runs through in retainer, and expect to improve further the lubricity in slip surface.

Claims (1)

1. a thrust-bearing, has: make running shaft be configured in coaxial a pair of circular raceway circle; The rolling element multiple cylindraceous of reciprocally relative movement between a pair of described raceway circle; With the circular retainer that multiple described rolling elements are equally spaced kept, this thrust-bearing is characterised in that,

On the end, inner circumferential side of described retainer, there is raceway circle towards one along the outstanding guide portion of described running shaft direction, on the outer circumferential side end of described retainer, there is the radially outstanding protuberance from described thrust-bearing, and,

Described thrust-bearing is formed as, the overhang from bearing bore diameter (a) of described guide portion is 0.3%≤X≤5.0% with respect to the ratio X of described raceway circle internal diameter (D1), and the overhang from bearing outside diameter (b) of described protuberance is 0.1%≤Y≤3.0% with respect to the ratio Y of described raceway circle external diameter (D2).