What Is a Bevel Box?
A bevel box, also known as a bevel gearbox, is a type of reduction gear used for motors. It is primarily utilized in large machinery and industrial equipment as a power source. A bevel box can alter the direction of the motor’s rotation shaft by 90 degrees in either an upward, downward, left, or right direction.
Depending on the model, the shaft may be split into two or four sections, allowing for the transmission of drive torque in various directions. Bevel boxes also feature built-in gears for torque reduction from the motor.
Uses of Bevel Boxes
Bevel boxes are essential in large machines like industrial machinery and tractors. They connect to the shaft of a power motor and can change the motor’s drive torque direction by 90 degrees.
The internal gears of bevel boxes vary in gear ratios, enabling them to operate at the same speed as the motor or to reduce the motor’s torque. For applications requiring only a change in rotation direction without deceleration, a 1:1 gear ratio is appropriate.
Principle of Bevel Boxes
A bevel gearbox consists of several components: a casing, shafts, oil seals, bearings, and spiral bevel gears. Bearings facilitate shaft rotation, grease sealed inside ensures smooth gear operation, and oil seals prevent grease leakage.
Spiral bevel gears come in various gear ratios, such as 1:1 or 1:2, allowing for speed reduction or maintenance of the original speed. Proper gear ratio selection is crucial for the intended application.
When installing a motor, it’s important to determine the rotation direction of each shaft. Bevel boxes can have two or four shafts, with the internal structure largely remaining the same. However, the number of shafts and gears can vary, affecting the rotation direction and speed reduction ratio. For instance, in a complex arrangement, shafts 1 and 2 might rotate in the same direction, while shafts 3 and 4 rotate oppositely, with only shaft 3 experiencing speed reduction.
Choosing the right bevel box involves careful consideration of its installation location and purpose, especially regarding the shaft arrangement and gear reduction ratio.