Product introduction

Chai

Chain drive is a kind of mechanical transmission mode that transfers the power of the driving sprocket to the driven sprocket through the chain. The idler gear tooth unit has special functions and characteristics in the chain drive system.

Chain Drive

Chain：It is made up of a series of chain links connected by pins. According to different application requirements, chains can be divided into roller chains, toothed chains and other types. Roller chains are the most common type, and their links are composed of inner chain plates, outer chain plates, pins, sleeves and rollers. Toothed chains have higher transmission accuracy and lower noise.

Sprocket：The sprocket includes an active sprocket and a driven sprocket. The sprocket has a tooth shape that meshes with the chain. The tooth shape and size of the sprocket are designed according to the specifications and transmission requirements of the chain.

Tensioning device：It is used to maintain the proper tension of the chain during the working process to prevent the chain from sagging or over-tightening. Common tensioning devices include tensioning wheels, spring tensioners, etc.

Working principle

The active sprocket drives the chain to move through rotation, and the chain transmits the power to the driven sprocket, so as to realize the transmission of power and the change of speed. The meshing between the chain and the sprocket is realized through the interaction between the roller or tooth shape of the chain and the cogging of the sprocket. This meshing method makes the chain drive have high transmission efficiency and reliability.

Feature：

Can work in high temperature, humidity, dust and other harsh environments, with strong adaptability.

With high transmission efficiency, it is generally achievable 95% - 98%。

It can achieve long-distance transmission, with a center distance of several meters or even tens of meters.

It can transfer a large amount of power and torque, and the power range can range from a few kilowatts to several hundred kilowatts, depending on the size and structure of the chain.

Compared with the belt drive, the chain drive has no elastic sliding and slipping phenomenon, which can ensure accurate transmission ratio.

Application field：Widely used in a variety of machinery and equipment, such as agricultural machinery, mining machinery, construction machinery, automotive engine timing systems, etc. In agricultural machinery, chain drives are used to drive the working parts of harvesters, planters, and other equipment; in mining machinery, conveyors and other equipment used to transport ore and materials; in automotive engines, chain drives are used to drive camshafts and other components.

Idler gear unit

Structure：The idler gear unit is mainly composed of idlers and teeth. An idler is usually an intermediate gear with no power input or output, and its teeth are meshed with the chain.

Effect：

In some complex transmission systems, it is necessary to change the direction of the chain through an idler to meet the layout and transmission requirements of the equipment.

Adjust the tension of the chain. By reasonably arranging the position of the idler, the tension of the chain can be adjusted to ensure the stability and reliability of the chain during the working process.

Increase the flexibility of the transmission ratio. In some systems that require multi-stage transmission or transmission, the idler can be used as an intermediate transmission component to achieve a combination of different transmission ratios.

Working principle

When the chain moves between the active sprocket and the driven sprocket, the teeth of the idler gear unit mesh with the chain and rotate with the movement of the chain. The idler itself does not actively provide power, but only plays a role in transferring power and changing the transmission direction and tension.

Design points：

Select the appropriate idler material and manufacturing process to ensure that the idler has sufficient strength and wear resistance. Common idler materials include steel, cast iron, etc. The manufacturing process includes forging, casting and machining.

According to the specifications and transmission requirements of the chain, design the appropriate idler gear tooth shape and size. The gear tooth modulus, pressure angle and other parameters should match the chain to ensure good meshing performance.

Reasonably determine the installation position and angle of the idler to achieve the required transmission function. In the design process, it is necessary to consider factors such as the tension force of the chain and the change angle of the transmission direction.

Application points：

When installing the idler gear unit, it is necessary to ensure that the engagement between the idler and the chain is correct to avoid the phenomenon of stuck chain and tooth skipping.

Regularly check the wear of the idler and the tension of the chain, and maintain and adjust it in time. If the idler is seriously worn, it should be replaced in time to ensure the normal operation of the transmission system.

In some high-speed or heavy-duty chain drive systems, the idler needs to be lubricated to reduce friction and wear, improve transmission efficiency and service life. Commonly used lubrication methods include drip lubrication, oil bath lubrication, etc.