Fastener key, pin connection, and drawing analysis: The so-called key connection is to achieve the circumferential fixation between the shaft and the parts on the shaft through keys to transmit motion and torque. Among them, some types can also achieve axial fixation and transmission of axial force, and some types can also achieve axial dynamic coupling. The pin is a standard part, which can be used as a positioning part to determine the mutual position of parts; it can also serve as a coupling to transmit lateral forces or torque; or as an overload cut-off part in a safety device. Pins can be divided into cylindrical pins, conical pins and special-shaped pins.

Key connection

1, key function, type and label

The function of (1) key: Use the key to connect the shaft with the transmission parts (such as gears, pulleys, etc.) on the shaft to transfer torque.

(2) Types of keys: ordinary flat keys, semi-circle keys and hook-head wedge keys

(3) key mark: key GB width x key length

example:

Mark: Key GB / T1096-2003 16x10x100

Means:

Round head plain key (A) type

Width = 16mm

Length = 100mm

Height = 10mm

2, the method of key connection:

Second, the pin connection

1, pin function, type and mark

(1) the function of the pin: the pin is mainly used for positioning between parts, can also be used for the connection between parts, but can only transmit small torque.

(2) Pin types: cylindrical pin, tapered pin, split pin

(3) Pin mark:

Cylinder pin with a nominal diameter of 10mm and a length of 50mm

Mark: Pin GB / T119.1-2000 B10x50

2, the method of pin connection