The connection method and fixing method of the pin coupling during installation

The pin coupling is a pin made of a number of non-metallic elastic materials, placed in the flange holes of the two halves of the coupling, and the two halves of the coupling are connected by the pin. The coupling has a simple structure and is easy to manufacture , It is more convenient to assemble, disassemble and replace the elastic element, without moving the two couplings.

There are two types of pin couplings: key connection and flange connection.The key connection is generally divided into keyway connection and splineway connection and clamping keyway connection.Commonly used is the ordinary keyway connection. When assembling the key coupling, it should be noted that the hub and the shaft are out of axis due to improper assembly of the key.The temperature difference assembly method of gear coupling mostly adopts heating method, and the method of cooling is relatively small.The correct installation should make the two sides of the key closely fit the wall of the keyway. Generally, the coloring method is used for inspection during assembly. If the fit is not good, a file or spatula can be used to repair it to meet the requirements.There is generally a gap on the upper part of the key, which is about 0.1-0.2mm.High-speed rotating machinery has high requirements for the coaxiality between the hub and the shaft. The single-key connection cannot achieve high coaxiality, and the double-key connection or spline connection can improve the coaxiality of the two.Then see the following introduction about the fixing method of the pin coupling:

1. Pin coupling positioning screw fixation: The two positioning screws have a gap of 90° to lock the fixed shaft. The traditional fixing method, because the front end of the screw contacts the shaft center, may cause damage or disassembly of the shaft center. difficult.

2. Pin coupling clamping screw fixation: Use the tightening force of the hexagon socket bolt to shrink the slit and clamp the shaft tightly.This method is convenient to fix and disassemble, and will not cause damage to the shaft, so it is a very common fixing method.

3. Pin coupling keyway type fixation: suitable for high-torque transmission. In order to prevent axial sliding, it is usually used together with set screw fixation and clamping screw fixation.

4. Pin coupling D-shaped hole fixing: Usually, if the motor shaft is D-shaped, if the positioning screw cannot be fixed, the coupling hole can be processed into D corresponding to the size of the motor shaft. The hole is fixed with the positioning screw, so there is no need to worry about slipping.

5. Expansion sleeve fixation: tighten the four positioning screws on the end face of the Lingsi coupling to compress the account cover. It is suitable for the connection and fixation of some stepping motors and servo motors with large torque, such as expansion sleeve diaphragm couplings. Shaft, expansion sleeve plum coupling, expansion sleeve bellows coupling, expansion sleeve pin coupling, etc.

To sum up, there are two main ways to connect the pin coupling. You can choose the appropriate connection and the fixing method of the coupling according to your needs.

Original article by the pin coupling manufacturer, please indicate the source address for reprinting: http://www.hbcrjx.com