Under the theoretical tooth thickness, Why is backlash required between meshing gears it is double-meshing, but due to the reasons of assembly error, machining error, thermal expansion and cold contraction, and lubrication, it must leave a certain tooth thickness side clearance, which is one-side meshing during operation. General engagement coefficient is greater than 1, Why is backlash required between meshing gears or relatively smooth.

Why is backlash required between meshing gears?

The gap is generally divided, which means the arc length on the dividing circle. The top gap is another concept.

When the gear meshes, Why is backlash required between meshing gears the two tooth surfaces will have relative sliding (except for nodes), so the tooth surfaces will have wear and lead to the decline of gear transmission performance. Therefore, the meshing tooth teeth need to be lubricated, and the meshing two tooth surfaces are separated by lubricating oil film, so as to reduce the sliding friction and wear. In view of this, it is necessary Why is backlash required between meshing gears to leave a side gap for the bearing side of the gear when it is manufactured.

Why is backlash required between meshing gears?

Another purpose of the side gap is to keep Why is backlash required between meshing gears the non-contact surface from being punctured. In this way, in the meshing drive, the tooth surface in contact with meshing is separated by a protective oil film and in the state of force, while the other tooth surface of the same gear is in the state of non-force, there will be a small gap.

Because the required side clearance is very small, such as the oil film is nanoscale thickness, so the gear side clearance does not need to be guaranteed on the millimeter level by nominal size, but only needs to be guaranteed through Why is backlash required between meshing gears tolerance.

Reasons for tooth side clearance in gear transmission:

Why is backlash required between meshing gears?

Gear side clearance, refers to a pair of mesh gear non-working surface, along the normal direction of the distance, a pair of mesh gear installation

Tooth side clearance shall be provided to compensate for the manufacturing and installation accuracy tolerances of the gear, Why is backlash required between meshing gears as well as the elastic deformation and deformation of the transmission load 

Due to the deformation under the influence of temperature, Why is backlash required between meshing gears a certain amount of lubricating oil can be stored to improve the lubrication state of gear surface. Usually the tooth

The clearance of the wheel should be as small as possible to ensure normal use, according to the accuracy level required by the gear during manufacturing 

To set it. Why is backlash required between meshing gears Gear standards ensure that side clearance is the basic side clearance range.

Why is backlash required between meshing gears?

Because a large amount of heat will be generated when the gear is working and the gear is expanded by heat, the side gap is the expansion space left for the gear. Without the side gap, the gear will be expanded or squeezed, Why is backlash required between meshing gears reducing the service life and affecting the work efficiency.

Christine Zhu ( Sales Department; Miss. )          
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