182results about How to "Eliminate axial play" patented technology

The invention discloses a steering power-assisted motor which comprises a motor output shaft and a worm coaxially connected with the motor output shaft. The first end of the worm is supported by a first bearing; the second end of the worm is supported by a second bearing; the first end of the worm is provided with a jack block and a pressing spring; the jack block is connected to the end face of the first end of the worm through the pressing spring; the first end of the motor output shaft is connected with the first end of the worm through a connecting piece; the first end of the motor output shaft is pressed against the side, away from the pressing spring, of the jack block; and the second end of the motor output shaft is supported by a third bearing. Compared with the prior art, by adoption of the structures of the jack block and the pressing spring, the pressing spring has the larger initial pressure to sufficiently eliminate axial clearance of the three axial bearings, and it is guaranteed that axial moving of the motor output shaft and the worm in the operation and working process does not occur.

The invention discloses a sealing device for a large bearing. The sealing device comprises an outer skeleton, an inner skeleton and a labyrinth rubber sealing piece, wherein the outer skeleton is fixed to a bearing outer ring, the inner skeleton is fixed to a bearing inner ring, and the labyrinth rubber sealing piece is arranged between the inner skeleton and the outer skeleton; the inner skeletoncomprises an inner skeleton inner ring and an inner skeleton outer ring, and the width of the inner skeleton outer ring is less than that of the inner skeleton inner ring; and one end of the outer skeleton is fixedly connected with the inner circumferential surface of the bearing outer ring, the other end of the outer skeleton extends into a cavity formed by the inner skeleton inner ring, a support ring and the inner skeleton outer ring, the labyrinth rubber sealing piece comprises a water retaining cover, an upper sealing lip and a lower sealing lip, a first labyrinth cavity is enclosed by the water retaining cover, the inner skeleton outer ring and the upper sealing lip, and a second labyrinth cavity is enclosed by the lower sealing lip, a sealing toothed groove and the inner skeleton inner ring. According to the sealing device, the purposes of internal oil seal and external dust prevention can be realized, the sealing dust prevention effect is good, tests show that the linear speedof the sealing device can reach at least 12 m / s, and the physical life can at least reach 5000 h.