Roller bearing oil feed device

Abstract

Fretting wear at the locations of contact between rolling elements and an inner ring is prevented even in the case where the outer ring and the inner ring of a roller bearing are rotating in synchronization. In a roller bearing (9) oil feed device in which a plurality of rolling elements (23) are arranged in a plurality of rows in the axial direction between this outer ring (21) and inner ring (22), the inner ring being divided for each row of the rolling elements (23) and a ring-shaped spacer (40) being interposed at the position of this division, the inner rings (22) and spacer (40) being fitted onto a rotary shaft (3), a circumferential groove (31) is provided in the inner peripheral section of the spacer (40) and oil feed holes (30) communicating with the circumferential groove (31) are provided in the rotary shaft (3) and an oil feed passage (47) having an inlet (48) opening into the circumferential groove (31) and an outlet (51) opening to a corner on at least one side in the axial direction of the spacer (40) is provided in the spacer (40). Since the outlet (51) of the oil feed passage (47) opens in a position which is immediately next to the locations of contact of the rolling elements (23) and inner ring (22) of each row, an ample amount of oil is distributed to these locations of contact and fretting wear can thus be prevented.

Description

technical field [0001] The present invention relates to a roller bearing with an oil supply, and more particularly to a roller bearing with an oil supply suitable for use with the splitter section of a manual transmission of an automobile. Background technique [0002] Figure 5 Indicates a transfer case section (primary shift section), most of which is located on the input side of a car's manual transmission. This gearbox includes an input shaft 1 through which the drive of the engine is transmitted, and a main shaft 3 inside the input shaft 1 , one end of which is coaxially supported by a roller bearing 2 freely relatively rotatable. The input shaft 1 is rotatably supported in the gearbox 4 by bearings 5 ​​. A secondary shaft 6 is parallel to the input shaft 1 and the main shaft 3 , below the input shaft 1 and the main shaft 3 . The countershaft 6 is also rotatably supported by bearings 7 in the gearbox 4 . [0003] One input shaft 8 is rotatably supported on the outer ...

AI Technical Summary

Problems solved by technology

Then, although a relatively large amount of oil is supplied to the contact portions of the roller elements 23 and the outer ring 21, it is difficult to realize oil supply to the contact portions of the roller elements 23 and the inner ring 22, and thus wear occurs at these contact portions.

Moreover, the oil supply holes 32 of the spacer 24 are provided with predetermined intervals in the circumferential direction, so it is possible that between the circumferentially adjacent oil supply holes 32, the oil cannot sufficiently penetrate into the farther contact portion in the axial direction; this Also tends to cause wear on the inner ring side

Images