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There are two main types of plum coupling

Publisher: Ever-Power Mechanical Equipment

  Plum couplingThere are mainly two types, one is the traditional straight claw type, and the other is the curved (inward) claw type with zero clearanceCoupling.Traditional straight claw typePlum couplingIt is not suitable for use in high-degree servo drive applications.The zero-backlash claw type plum blossom coupling evolved on the basis of the straight claw type, but the difference is that its design can be adapted to the application of the servo system, and is often used to connect servo motors, stepping motors and ball screws.The curved surface is to reduce the deformation of the elastic plum spacer and limit the influence of centripetal force on it during high-speed operation.The zero-clearance claw coupling is composed of two metal sleeves (usually made of aluminum alloy, stainless steel can also be provided) and a plum blossom elastic spacer.The plum blossom elastic spacer has multiple leaf branches. Like a slider coupling, it also squeezes the plum blossom elastic spacer and the sleeves on both sides to ensure its zero clearance performance.Different from the slider coupling, the plum blossom coupling is driven by squeezing while the slider coupling is driven by shear.When using a zero-clearance claw coupling, the user must pay attention not to exceed the large bearing capacity of the elastic element given by the manufacturer (under the premise of ensuring zero clearance), otherwise the plum elastic spacer will be squashed and deformed. The elasticity and the loss of preload will lead to the loss of zero-gap performance, which may be discovered by users only after serious problems occur.