هيأ اقتران
Solitary joint gear couplings are utilised to connect two nominally coaxial shafts. In this application the system is called a gear-variety adaptable, or adaptable coupling. The one joint allows for small misalignments this sort of as installation problems and changes in shaft alignment owing to functioning conditions. These sorts of equipment couplings are normally limited to angular misalignments of 1/four to 1/2°.
Equipment couplings ordinarily occur in two variants, flanged sleeve and continuous sleeve. Flanged equipment couplings consist of short sleeves surrounded by a perpendicular flange. One particular sleeve is placed on each shaft so the two flanges line up face to encounter. A collection of screws or bolts in the flanges keep them together. Continuous sleeve gear couplings attribute shaft finishes coupled with each other and abutted towards every single other, which are then enveloped by a sleeve. Generally, these sleeves are produced of steel, but they can also be produced of Nylon.
Every joint usually is made up of a 1:1 gear ratio internal/external gear pair. The tooth flanks and outer diameter of the exterior equipment are crowned to enable for angular displacement amongst the two gears. 
Mechanically, the gears are equal to rotating splines with modified profiles. They are called gears because of the fairly large measurement of the enamel. Equipment couplings are usually limited to angular misalignments of 4 to 5°.
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