CN203835977U

CN203835977U - Thrust bearing

Info

Publication number: CN203835977U
Application number: CN201420260090.3U
Authority: CN
Inventors: 寺田和晃
Original assignee: NSK Ltd
Current assignee: NSK Ltd
Priority date: 2014-05-21
Filing date: 2014-05-21
Publication date: 2014-09-17
Anticipated expiration: 2024-05-21

Abstract

The utility model relates to a thrust bearing. The thrust bearing is specifically composed of a pair of circular-ring-shaped roller path rings, multiple relatively moving cylindrical rolling bodies arranged in the circular-ring-shaped roller path rings and a circular-ring-shaped retainer separating the rolling bodies at intervals. The end portion of the inner peripheral side of the retainer is provided with a guiding portion facing the roller path rings on one side and protruding in the direction of a rotating shaft, and the proportion X of the protruding amount of the guiding portion extending from the bearing inner diameter relative to the inner diameters of the roller path rings is 0.2%<=X<=3.0%, and the proportion Y of the protruding amount of the guiding portion extending from the bearing outer side end faces of the rolling bodies relative to the outer diameters of the roller path rings is 0.5%<=Y<=2.5%. Therefore, the sliding resistance of the thrust bearing in high-speed rotation is reduced, the rotation stability is improved, and the lubricating performance is improved.

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 slip resistance reduction, rotational stabilization raising and lubricity raising under the High Rotation Speed of thrust-bearing improve and just become problem.

Model utility content

In order to solve above-mentioned problem, the utility model provides a kind of thrust-bearing, and 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 of bearing bore diameter with respect to the ratio X of described raceway circle internal diameter, retainer is 0.5%≤Y≤2.5% from the overhang of end face outside the bearing of described rolling element with respect to the ratio Y of described raceway circle external diameter, thus, the slip resistance that can realize under the High Rotation Speed of thrust-bearing reduces, rotational stabilization improves and lubricity improves.

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: running shaft is configured in coaxial a pair of circular raceway circle 2; The multiple cylindric rolling element 3 of also mutual relative movement between above-mentioned a pair of raceway circle; With the circular retainer 4 that above-mentioned multiple 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 of accommodating rolling element 3, has 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 end, inner circumferential side.And, be formed as, guide sections is 0.2%≤X≤3.0% from the overhang a of bearing bore diameter with respect to the ratio X of above-mentioned raceway circle inner diameter D 1, retainer is 0.5%≤Y≤2.5% from the overhang b of end face outside the bearing of above-mentioned rolling element with respect to the ratio Y of above-mentioned raceway circle outer diameter D 2, thus, in the time that thrust-bearing carries out High Rotation Speed, make the lubricity optimization of slip resistance, rotational stabilization and thrust-bearing, the performance that can realize bearing improves.In addition, in the utility model, bearing bore diameter being made as to 540mm～3200mm and bearing outside diameter being made as in the using scope of 662mm～3400mm, obviously show performance and improve.And, arrange the oiling agent feed path running through in retainer towards rolling surface side and guide surface exterior side by the internal side diameter from retainer, and expect further to improve the lubricity on slip surface.

Claims

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).