Cycloidal pin wheel reducer

Cycloidal pin wheel reducer
A reducer is an independent component composed of gear transmission, worm gear transmission, and gear worm gear transmission enclosed in a rigid housing, commonly used as a reduction transmission device between the prime mover and the working machine. It plays a role in matching speed and transmitting torque between the prime mover and the working machine or actuator, and is widely used in modern machinery.

Gearboxes are generally used for low-speed and high torque transmission equipment. They reduce the speed of electric motors, internal combustion engines, or other high-speed power by meshing the gears with fewer teeth on the input shaft of the gearbox with the large gears on the output shaft. Ordinary gearboxes also have several pairs of gears with the same principle to achieve the desired reduction effect. The ratio of the number of teeth between the large and small gears is the transmission ratio.

The reducer plays a role in matching speed and transmitting torque between the prime mover and the working machine or actuator, and is a relatively precise mechanical device. The purpose of using it is to reduce the speed and increase the torque. It has a wide variety of types, different models, and different types have different purposes. There are many types of reducers, which can be divided into gear reducers, worm reducers, and planetary gear reducers according to the transmission type; According to different transmission stages, it can be divided into single-stage and multi-stage reducers; According to the shape of gears, they can be divided into cylindrical gear reducers, bevel gear reducers, and cone cylindrical gear reducers; According to the arrangement of transmission, it can be divided into expansion type reducer, diversion type reducer, and coaxial type reducer.
 

Cycloid pinwheel reducer is a novel transmission device that applies the principle of planetary transmission and adopts cycloidal pinwheel meshing. The transmission device of the cycloidal pinwheel reducer can be divided into three parts: input part, reduction part, and output part. A double eccentric sleeve with a 180 ° misalignment is installed on the input shaft, and two roller bearings called rotating arms are installed on the eccentric sleeve to form an H mechanism. The center holes of the two cycloidal gears are the raceways of the rotating arm bearings on the eccentric sleeve, and the cycloidal gears mesh with a set of annular arranged needle teeth on the needle gear to form an internal meshing reduction mechanism with a tooth difference of one tooth (in order to reduce friction, needle teeth are equipped with needle tooth sleeves in reducers with low speed ratios).

When the input shaft rotates one revolution with an eccentric sleeve, due to the characteristics of the tooth profile curve on the cycloid gear and its restriction by the needle teeth on the needle gear, the motion of the cycloid gear becomes a planar motion with both revolution and rotation. When the input shaft rotates one revolution in the forward direction, the eccentric sleeve also rotates one revolution, and the cycloid gear rotates one tooth in the opposite direction to obtain deceleration. Then, with the help of the W output mechanism, the low-speed rotation motion of the cycloid gear is transmitted to the output shaft through the pin shaft, thereby obtaining a lower output speed.