Method for determining the diameter of gear inner hole

Writer： admin Time：2024-05-30 14:39:26 Browse：44℃

1、 The importance and influence of gear inner hole diameter

The diameter of the gear inner hole determines the diameter of the gear shaft and directly affects the fit between the gear and the shaft. If the diameter of the inner hole is too small, it will cause the gear to not be inserted correctly into the shaft, and have adverse deformation effects on the shaft, leading to shaft failure; On the contrary, an excessive diameter of the inner hole can affect the tightness of the fit between the gear and the shaft, causing rotational differences in the gear and resulting in poor gear working conditions. Therefore, the correct selection of the diameter of the gear inner hole is crucial for the operation of the gear.

2、 Method for determining the diameter of gear inner hole

1. Calculation method

The calculation of inner hole diameter can be determined by the module, number of teeth, pressure angle, and shaft diameter of the gear. Normally, the calculation formula for diameter is: inner hole diameter=number of teeth/module+2 x shaft diameter x tan (pressure angle/2). Among them, the number of teeth, modulus, and pressure angle are the basic parameters of gears, and the shaft diameter can be determined by the bearing capacity and required reliability of the gear.

2. Experimental method

The actual parameters of the diameter of the inner hole can also be determined through experiments. The experiment can determine the diameter size by placing the gear into the shaft and checking its operating condition.

3、 Selection of inner hole diameter

When determining the diameter of the inner hole, it is necessary to consider the gear material, gear size, and working conditions of the gear. Normally, the diameter of the inner hole should be moderately increased to increase the gap between the gear and the shaft for adjustment during production and use. For example, when manufacturing high-precision gears, the size of the inner hole diameter should usually be slightly larger than the standard specifications, in order to achieve the required accuracy requirements after machining.

4、 Summary

The diameter of the inner hole of a gear is determined by its material, size, and working conditions. When determining the diameter of the inner hole, it is necessary to clarify that its size has a direct impact on the operation of the gear. Therefore, an appropriate size should be selected. Whether determining the diameter of the inner hole through calculation or experimentation, attention should be paid to the material, size, and working conditions of the gear.