Analysis of the characteristics of hypoid gears

First of all, Hypoid gearThe intersection angle of the shaft is 90°, and the torque direction can be changed by 90°, which is also the angle conversion often required in the automobile, aircraft, or wind power industry.At the same time, a pair of gears with different sizes and different numbers of teeth mesh to test the function of torque increase and speed decrease, which is commonly called "torque increase and speed decrease".If you have driven a car, especially when you are learning to drive a manual car, when climbing a hill, the instructor will let you hang in a low gear. In fact, you should choose a pair of gear pairs with a relatively high speed and provide it at low speed. More torque, thus providing more power to the vehicle.

thatHypoid gearWhat are the characteristics?

XNUMX. Changes in the transmission torque angle

As described above, the angle change of torque power can be achieved.

able to withstand higher loads

In the wind power industry, the automotive industry, whether it is passenger cars, SUVs, or commercial vehicles such as pickup trucks, trucks, buses, etc., will use this type to provide greater power.

Smoother transmission and less noise

The pressure angle of the left and right sides of its teeth can be inconsistent, and the sliding direction of the gear meshing is along the direction of the tooth width and tooth profile, and a better gear meshing position can be obtained through design and technology, so that the entire transmission is under load. It still performs well in NVH performance.

Adjustable offset distance

Due to the different designs of the offset distance, it can be used to meet different space design requirements. For example, in the case of a car, it can meet the ground clearance requirements of the vehicle and improve the passability of the car.

two,Hypoid gearprocessing method

Quasi-duplex gears were introduced by Gleason Work in 1925 and have been developed for many years.At present, there are many domestic equipments that can be processed, but the relatively high-precision and high-end processing is mainly performed by foreign equipment Gleason and Oerlikon.In terms of finishing, there are mainly two types of grinding process and grinding process, but the requirements for the cutting process are different. For the grinding process, the face milling process is recommended for the cutting process, and the face hobbing cutting process is recommended for grinding.

The gears processed by face milling are tapered teeth, and those processed by face hobbing are equal-height teeth, that is, the tooth heights at the large and small end faces are the same.

The usual processing flow is roughly pre-heat processing, after heat treatment, and then finishing.For the face hob type, it needs to be ground and matched after heating. Generally speaking, the pair of gears ground together should remain matched when assembled later.However, for the gears of the grinding process and finishing process, theoretically, they can be used without pairing. However, in the actual operation process, considering the influence of assembly errors and system deformation, the pairing mode is still used.

XNUMX. The design and development of the hypoid is more complicated, especially in the working conditions or high-end products with higher requirements, which have requirements on the strength, noise, transmission efficiency, weight and size of the gears.Therefore, in the design stage, it is usually necessary to integrate multiple factors to find a balance point through iteration.During the development process, it is usually necessary to adjust the tooth impression within the allowable variation range of the assembly to ensure that the ideal performance level can still be achieved under the actual conditions due to the accumulation of the dimension chain, system deformation and other factors.