A mechanism that changes swing friction into rotational friction

Abstract

The invention discloses a mechanism for changing swing friction into rotation friction. The mechanism is composed of an outer ring, a middle ring A, a middle ring B, a middle pre-tightening ring, an inner ring, a ball, an inner ball holder, an outer ball holder, screws, a spring, a spring fixing block, a roller, a roller compaction block and an overrun clutch plate, wherein the middle ring A and the middle ring B are connected with the pre-tightening ring through the screws to form a middle ring; the ball and the ball holder are arranged between the inner ring and the middle ring and between the middle ring and the outer ring; and a bidirectional overrun clutch is connected with the middle ring through the screws. The mechanism disclosed by the invention has the following advantages: local small-angle swing is changed into circumferential rotation, the problems of local wear and wear debris accumulation of a bearing during small-angle swing are solved, the rotation speed uniformity of a precision swing mechanism is improved, and the service life of the swing mechanism is prolonged. The mechanism is of great significance to improving the rotation precision of a spatial solid lubricating high-precision swing mechanism and prolonging the service life.

Description

technical field [0001] The invention relates to a solid lubricating bearing mechanism, in particular to a solid lubricating special rolling bearing mechanism with a two-way overrunning clutch. Background technique [0002] Aerospace optical remote sensing instruments use oscillating mirrors to expand the field of view. Oscillating mirrors are actually the general term for pointing mirrors and swing mechanisms. The structure is that the pointing mirrors are installed on the rotating shaft, and the rotating shaft is supported by bearings. The rotating shaft is driven by a motor to realize the swinging of the pointing mirror. At present, the bearings of the space swing mechanism adopt two lubrication methods: solid lubrication and oil (grease) lubrication, of which oil (grease) lubrication is boundary lubrication. In addition to considering the characteristics of the lubricating oil (grease) itself when using the space, it is also necessary to solve the problem of sealing, Clim...

AI Technical Summary

Problems solved by technology

[0005] The swinging friction is transformed into a rotating friction mechanism, and the small-angle swing of the fixed local position of the existing solid lubricating bearing is transformed into a circular rotation, which solves the problem of local wear and debris accumulation of the bearing and prolongs the service life. For example: general solid lubricating bearings has a lifetime of 5×10 6 Turn, when swinging at ±6°, swing 60 times, this mechanism turns 1 turn, according to the above 5×10 6 The life of the rotation, the number of swings reaches 3×10 8 times, that is, billions of times, which greatly prolongs the service life of the swing mechanism

Compared with the prior art, the invention has the beneficial effects of solving the problem of local wear and accumulation of solid lubricating debris when the rolling bearing is oscillating, improving the uniformity of the rotation speed, and greatly prolonging the service life of the oscillating mechanism

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