The stepped hole bearing end cover, whose stepped part can act as an outer bearing cover, can reduce the number of parts and simplify the motor structure. Motors with a center height of less than H160 use this end cover, and everyone is also used to call the end cover End cap without holes.
2. According to the different materials used in the Cover or Frame Aluminum Motor Housing, it can be divided into three types: cast iron, steel and aluminum alloy. Cast iron is cheap, has better manufacturing and processing properties, and has sufficient mechanical strength. Therefore, cast iron end caps are widely used in small and medium-sized motors. Only in special occasions, such as traction motors and explosion-proof motors, when the mechanical strength requirements are high, cast steel end caps or high-strength cast iron end caps are used.
In mass-produced fractional horsepower motors, in order to reduce weight and processing man-hours, aluminum alloy Cover or Frame Aluminum Motor Housings are used.
3. According to the different positions of the Cover or Frame Aluminum Motor Housing, it can be divided into front end (non-drive end) and rear end cover (drive end). The structure of the front end cover is more complicated, and it is also difficult to manufacture and process. In order to make the front and rear end caps universal, slip rings are often installed outside the end caps.
4. According to the different forms of the stop of the Cover or Frame Aluminum Motor Housing, it can be divided into an inner stop end cover and an outer stop end cover. The spigot on the inner circle of the machine base's spigot surface is called the inner spigot. The stop surface of the machine base on the outer circle is called the outer stop.
5. According to whether there is a flange on the Cover or Frame Aluminum Motor Housing, it can be divided into flange (flange) end cover and no convex end cover. The through hole on the flange of the end cover is used for installing the motor. Generally, the motor is installed with the foot hole of the base. Therefore, the flangeless end cover is commonly used.
