Plum-shaped Couplings

The plum shaped coupling consists of three main parts:

1. Two metal claw plates: usually made of 45 steel, aluminum alloy or stainless steel materials can also be selected for lightweight or special working conditions. The claw plate is precision machined, milled, and pulled to ensure mechanical strength.
   

2. Elastic element: located between two claw disks, usually made of polyurethane or rubber material, in the shape of plum petals (usually 4-8 petals). Elasticity directly determines its damping performance and service life.

The plum shaped coupling achieves power transmission and deviation compensation through elastic deformation:

1. Torque transmission: relying on the compression deformation of elastic elements between the teeth to transmit torque, rather than the shear method of traditional couplings
   

2. Deviation compensation: When there is relative deviation between the two axes, the elastic element deforms and automatically compensates for axial, radial, and angular deviations
   

3. Vibration absorption: Elastic materials can effectively absorb system vibration energy and reduce the impact load transmitted to equipment

According to structural design, it can be divided into:

1. Traditional straight claw type: suitable for general transmission occasions
   

2. Curved (concave) claw type: zero gap design, specially optimized for precision servo systems
   

3. Split design: such as LMS double flange type, easy to maintain and replace the elastic body

Divided by fixed methods:

1. Positioning screw fixed type: traditional method, low cost but may cause shaft damage
   

2. Clamp fastening and shaping: fixed by radial pressure to reduce the risk of shaft damage
   

3. Expansion sleeve connection type: high torque application, providing more uniform fastening force

Performance Characteristics

1. Gapless transmission: The curved claw design achieves zero backlash, suitable for precision servo control
   

2. Maintenance free: No lubrication required, reducing downtime for maintenance
   

3. Electrical insulation: prevent current from forming a circuit through the coupling
   

4. Compact and lightweight: small radial size, low moment of inertia, suitable for high-speed applications
   

5. Multi directional compensation: simultaneously compensating for axial, radial, and angular deviations

Application field

1. CNC machine tool: connection between servo motor and ball screw
   

2. Packaging machinery: frequent start stop, forward and reverse situations
   

3. Pump equipment: compensates for installation deviations and absorbs water hammer impacts
   

4. Lifting and transportation: Medium torque transmission, high reliability requirements
   

5. Wind power equipment: connection between generator and gearbox

The plum shaped coupling, with its simple structure and reliable performance, has become an irreplaceable basic component in the field of mechanical transmission. Proper selection and use can significantly improve system reliability and reduce maintenance costs. With the development of industrial equipment towards high speed and precision, the demand for high-performance plum blossom couplings will continue to grow.