CN203835977U - Thrust bearing - Google Patents

Abstract

The utility model relates to a thrust bearing, which is composed of: a pair of ring-shaped raceway rings; a plurality of cylindrical rolling bodies moving relative to each other in the pair of raceway rings; and a plurality of the above-mentioned rolling bodies, etc. The ring-shaped cage held at intervals has a guide portion protruding toward one of the raceway rings in the direction of the rotation axis on an inner peripheral end portion of the cage, and the guide portion is formed so that the guide portion extends from the bearing The ratio X of the protruding amount of the inner diameter to the inner diameter of the above-mentioned raceway ring is 0.2%≤X≤3.0%, and the ratio Y of the protruding amount of the cage from the bearing outer end surface of the above-mentioned rolling element to the outer diameter of the above-mentioned raceway ring is 0.5% ≤Y≤2.5%. Thereby, it is possible to reduce the sliding resistance under high-speed rotation of the thrust bearing, improve the rotation stability, and improve the lubricity.

Description

Thrust bearings

technical field

The utility model relates to a thrust bearing used for high-speed rotation and the like.

Background technique

Conventionally, performance improvements such as reduction of sliding resistance under high-speed rotation of thrust bearings, improvement of rotation stability, and improvement of lubricity have been the subject.

Utility model content

In order to solve the above problems, the utility model provides a thrust bearing, which has: a pair of ring-shaped raceway rings whose rotating shafts are arranged on the same axis; a cylindrical rolling body; and an annular cage holding a plurality of the rolling bodies at equal intervals, the thrust bearing is characterized in that an inner peripheral end of the cage has a The guide portion of the raceway ring protruding in the direction of the rotation axis is formed so that the ratio X of the protrusion amount of the guide portion from the inner diameter of the bearing to the inner diameter of the raceway ring is 0.2%≤X≤3.0 %, the ratio Y of the amount of protrusion of the cage from the bearing outer end surface of the rolling element to the outer diameter of the raceway ring is 0.5%≤Y≤2.5%, whereby sliding under high-speed rotation of the thrust bearing can be realized Reduced drag, improved rotational stability and improved lubricity.

Description of drawings

Fig. 1 is a sectional view showing a thrust bearing of the present invention.

Detailed ways

The thrust bearing 1 of this embodiment has: a pair of annular raceway rings 2 whose rotating shafts are coaxially arranged; a plurality of cylindrical rolling elements 3 located between the pair of raceway rings and moving relative to each other; and an annular cage 4 that holds the plurality of rolling elements at equal intervals. The above-mentioned raceway ring 2 is in the shape of a ring, and a rolling surface is formed on the surface in the direction of the rotation axis. The cage 4 has a plurality of pockets for accommodating the rolling elements 3, and has a guide portion 4a protruding toward the one raceway ring in the direction of the rotation axis at the inner peripheral end and engaging with the inner peripheral surface of the raceway ring. . Furthermore, the ratio X of the protrusion amount a of the guide portion from the inner diameter of the bearing to the inner diameter D1 of the raceway ring is 0.2% ≤ X ≤ 3.0%, and the protrusion amount b of the cage from the bearing outer end surface of the rolling elements is opposite. The ratio Y of the outer diameter D2 of the above-mentioned raceway ring is 0.5%≤Y≤2.5%, so that when the thrust bearing rotates at a high speed, the sliding resistance, the rotation stability and the lubricity of the thrust bearing are optimized to achieve The performance of the bearing is improved. Moreover, in this invention, performance improvement is remarkably exhibited in the use range which made bearing inner diameter 540mm - 3200mm and bearing outer diameter 662mm - 3400mm. Further, it is desired to further improve the lubricity on the sliding surface by providing a lubricant supply path penetrating the inside of the cage from the radially inner side of the cage to the rolling surface side and the outer surface side of the guide surface.

Claims (1)

1. a thrust-bearing, it has: running shaft is configured in coaxial a pair of circular raceway circle, the multiple cylindric rolling element of also mutual relative movement between a pair of described raceway circle, with the circular retainer that multiple described rolling elements are equally spaced kept, described thrust-bearing is characterised in that, on the end, inner circumferential side of described retainer, there is described raceway circle towards a side along the outstanding guide portion of described running shaft direction, and, be formed as, described guide portion is 0.2%≤X≤3.0% from the overhang (a) of bearing bore diameter with respect to the ratio X of described raceway circle internal diameter (D1), retainer is 0.5%≤Y≤2.5% from the overhang (b) of end face outside the bearing of described rolling element with respect to the ratio Y of described raceway circle external diameter (D2).