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The gear system of ATV is an important part of its transmission system, which determines the power transmission efficiency and performance of the vehicle. A gear system usually consists of one or more pairs of meshing gears that determine the transmission ratio and moment ratio by the number, size, and shape of the teeth.

In ATVs, the gears in forward and reverse gear are similar in structure, but the way they mesh is different. This is mainly to meet the special needs of ATVs when driving on sand. To be specific:

1. Forward gears: They are usually designed with a low number of teeth to provide a large torque output, which helps the vehicle overcome resistance in the sand. The forward gear meshes in such a way that after the speed of the input shaft is reduced through the gear, the output shaft can obtain enough torque to move forward.

2. Reverse gear: In order to achieve reverse driving, the number of teeth of the reverse gear is usually more than the number of teeth of the forward gear, so that in the case of the same input shaft speed, the speed of the output shaft will be slower than that of the forward, but it can be reversed to achieve reverse rotation.

Atv gear materials typically require high strength and wear resistance, as sandy environments are particularly abrasive to vehicle components. Commonly used materials include alloy steel, hardened steel or other wear-resistant metal materials, and sometimes synthetic materials are used to reduce the weight of the vehicle.

When using ATVs, proper operation and maintenance is essential to ensure safety. Drivers should ensure that they are familiar with the vehicle's operating manual and understand how to drive safely in different gears. At the same time, regular inspection and maintenance is also necessary, including gearbox lubrication, gear wear, etc., to ensure the normal work of the gear system. For vehicles involved in accidents, professional inspections and repairs are needed to ensure that their safety performance meets standards.