Forward design and calculation method of sprag clutch structure

Abstract

The invention discloses a forward design and calculation method of a sprag clutch structure. The forward design involves wedge blocks arranged in an arc-shaped surface mode, an outer sleeve and an inner shaft, wherein a roller path is formed between the outer sleeve and the inner shaft, and the wedge blocks are arranged in the roller path in a sliding mode; and the calculation method comprises thesteps that S1, an inner raceway and an outer raceway are reversed, and the movement of the wedge blocks is analyzed, and S2, the maximum lift is solved. The invention belongs to the technical field of design methods of sprag type overrunning clutches, and particularly provides the forward design and calculation method of the sprag clutch structure. According to the forward design and calculationmethod of the sprag clutch structure, on the premise of not changing basic parameters, a wedge block structure is locally corrected, and new parameters are added, so that the effective lifts of four standard wedge blocks are all greater than corresponding original standard data and reach the maximum value, the overall overturning torque and the ultimate load of the clutch are further improved, andthe overall performance of sprag type overrunning clutches in two forms including a forced continuous sprag clutch and an all-phase sprag clutch is improved.

Description

technical field [0001] The invention belongs to the technical field of the design method of the sprag type overrunning clutch, and specifically refers to a forward design and calculation method of the sprag clutch structure. Background technique [0002] Sprag clutches include forced continuous sprag clutches and all-phase sprag clutches, both of which are friction overrunning clutches. An overrunning clutch is a clutch that can be automatically engaged or disengaged according to changes in the relative movement speed of the main and driven parts, or changes in the direction of rotation. Among them, the sprag clutch has the characteristics of large transmission torque and small mass, and is widely used in working environments such as helicopter transmission systems, starters of aeroengines, and automatic gearboxes. [0003] The early literature is the main reference basis for arc profile clutches at home and abroad, but the specific position of the wedge width is not given,...

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Problems solved by technology

[0003] The early literature is the main reference basis for arc profile clutches at home and abroad, but the specific position of the wedge width is not given, and the design method and basis contained in it are not given.

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