Bevel gear transmission.Bevel gear transmission also has the characteristics of cylindrical gear transmission.
Features: Large transmission power range, high efficiency, compact structure and waiting point.It can be seen from the figure that the bevel gear transmission is different from the cylindrical gear transmission of the plane mechanism, but the main mechanism, which is used to transmit the motion and power between the two intersections.
The gear teeth are distributed on the truncated cone, and the tooth shape gradually becomes smaller from the big end to the small end.For the convenience of calculation and measurement, the big-end parameters of bevel gears are usually taken as standard values.Its value can be selected according to the cylindrical gear.
Since the teeth of the bevel gear are distributed on the truncated cone, the relevant cylinders in the cylindrical gear are correspondingly conical in the bevel gear, such as indexing cone, tip cone, root cone, etc.The angle between a pair of bevel gear shafts is called the shaft intersection angle, which can be determined according to the transmission requirements of the mechanical device.In general machinery, take ∑=90° more.
The bevel gear transmission has various forms such as straight teeth and curved teeth. Because the design, manufacture and installation of the straight bevel gear transmission are simple, it is the most widely used.
Compared with straight teeth, curved teeth have stable transmission and high bearing capacity. They are often used in high-speed and heavy-duty transmission, such as bevel gear transmission in automobiles, tractors, and airplanes, but the design and manufacture are more complicated.