摘要:
A planetary gear speed reduction mechanism (100) has a sun gear (1), an internal gear (2) and a plurality of planetary gears (3) disposed between both gears (1, 2). Each tooth (10) of the sun gear (1) has a tapered portion (11) formed at a front end thereof such that the tapered portion (11) tapers off in the axial direction. The tapered portion (11) has a pair of symmetrical inclined surfaces (11b) whose width is tapered off in the circumferential direction from a tooth surface (10b) of each tooth (10) and a tapered surface (11a) whose peripheral surface is tapered off in the radial direction from an end of a tooth crest surface (10a). In the process of inserting the sun gear (1) into a space among the planetary gears (3), the sun gear (1) is inserted thereinto under the guide of the inclined surface (11b) by slightly rotating the sun gear (1).
摘要:
A brush of a rotary electric machine includes a brush element (10) and a pigtail (3). The brush element (10) includes a high-conduction member (2) extending in the longitudinal direction and a low-conduction member (1) bonded to a side of the high-conduction member (2). The low-conduction member (1) is a thin layer extending in the longitudinal direction from the contact surface (11) to the middle of the length of the brush element (10). The wire end (31) is embedded in the high-conduction member (2) on the side of the low-conduction member (1) remote from the contact surface (11).