According to whether the coupling contains elastic elements, it can be divided into:
1. Rigid coupling:
Fixed - high requirements for neutrality
Movable - can compensate for various offsets
2. Elastic coupling: it can compensate various offsets, buffer and absorb vibration
1、 Rigid coupling
1. Fixed rigid coupling requires good alignment of two shafts
(l) Clamp coupling
It is composed of two semicircular cast iron clamping shells and locked with bolts. The torque is mainly transmitted by friction. For reliable transmission, a flat key can be added. Features: convenient disassembly and assembly, simple structure and small transmission torque. It is generally used for shafts with d < 200mm.
2) Flange coupling
It is composed of two half couplings with flanges connected by bolts, and the half coupling shaft is connected by keys
Alignment form: shoulder alignment, good alignment; Split ring alignment, easy assembly and disassembly.
Bolt connection: refined bolt connection, and the clearance depends on friction; Bolt for reaming hole, close fit (by extrusion and shear)
Common material: ht28-48 or carbon steel
Cast steel or forged steel shall be used when heavy load or V > 30m / s.
Features: simple structure, can transmit large torque, widely used, suitable for occasions with large shaft rigidity and good neutral.
2. Movable rigid coupling
It is movable and can compensate the offset between two axes
(l) Cross slider coupling
It is composed of two half couplings with grooves and a disc with mutually perpendicular teeth on both ends.
Common material: 45 steel, the working surface is heat treated
It is suitable for occasions with rotating speed n ＜ 250rpm and high shaft rigidity.
(2) Slider coupling
Change the slider into a square and make it of nylon or cloth and bakelite.
It is suitable for small power, rotating speed and violent impact
