Belt drive is one of the important inventions of the ancient Han people. As early as the first century BC, China had a belt drive. There is a record of belt transmission in the 15th century BC historical books. The earliest emergence of belt transmission has a close relationship with the development of the Chinese silk industry. The belt drive produces a continuous rotary motion that conducts force from one drive wheel to the other.
Belt drive plays an extremely important role in the final invention of the spinning wheel. The chain drive that has emerged since then is another improvement that has occurred on the basis of belt drives. The belt drive technology was introduced to Europe along with the spinning wheel, which in turn promoted many related inventions. The belt drive is to turn the A drive wheel to the B drive wheel, which is also the predecessor of modern transmission technology.
In engineering design, belt drive is relative to DC drive, generally can be divided into the following four forms: ZV drive, CV drive, CR drive and CL drive.
The specific form of these four transmissions is as follows:
Among them, ZV transmission and CV transmission are relatively speaking. ZV transmission is shown in the figure. CV transmission means that the motor is mirrored from the position on the drawing to one side of the pump. The motor, belt and pump form a "C" type transmission.
The CR drive and the CL drive are relatively speaking. "R" means right, meaning "right", and "L" means left, meaning "left". As seen from the inlet direction of the pump, the motor is on the right, that is, the CR drive, and on the left, the CL drive.