Ball Screw Coupling
Ball screw coupling is a device, it connects two shafts or a shaft and a rotating part, and it rotates together in the process of transmitting movement and power, and it does not disengage under normal conditions. Sometimes it is safety device to prevent the connected parts from being subjected to excessive loads, and it play a role in overload protection.
Ball Screw Coupling Performance requirements
According to different working conditions, the coupling needs to have the following performance:
- Mobility.
- Cushioning.
- Safe and reliable, with sufficient strength and service life.
- Simple structure, convenient assembly and disassembly, and maintenance
Selection of coupling type when selecting a coupling type, considering following items
Firstly, Transmitt the size and nature of the torque, the requirements for buffering and damping functions, and the possibility of resonance.
Secondly, The degree of relative displacement of the axes of the two shafts.
Thirdly, Allowable dimensions and installation methods are the operating space, it necessary for ease of assembly, adjustment and maintenance. For large couplings, it should be possible to disassemble and assemble, without the need for axial movement of the shaft.
In addition, Considering the working environment, service life, and lubrication, sealing and economy, and then refer to the characteristics of various couplings to select a suitable coupling type
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Coupling classification
Couplings can be divided into two categories: rigid couplings and flexible couplings.
Flexible couplings have two type, flexible couplings without elastic elements and flexible couplings with elastic elements. The former type only has the ability to compensate the relative displacement of the two axes, but it cannot buffer and reduce vibration. The common ones are slippery. Block couplings, gear couplings, universal couplings and chain couplings, etc.; the latter type contains elastic elements, in addition to the ability to compensate for the relative displacement of the two axes, it also has buffering and damping functions.
However, the transmitted torque is limited by the strength of the elastic element, and is generally not as good as the flexible coupling without elastic elements. Commonly used are elastic sleeve pin couplings, elastic pin couplings, plum-shaped couplings, and tire-type couplings. Couplings, serpentine spring couplings and reed couplings, etc.
