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The tooth shape of the spiral bevel gear is an arc shape, and it is generally conical, like a bevel, hence the name spiral bevel gear.
Spiral bevel gear is a transmission part that can drive smoothly and with low noise according to a stable transmission ratio. It has different names in different regions. It is also called spiral bevel gear, arc bevel gear, etc.
The spiral bevel gear has high transmission efficiency, stable transmission ratio, large arc overlap coefficient, high load-bearing capacity, stable and smooth transmission, reliable operation, compact structure, energy and material saving, space saving, wear resistance, long life and low noise.
Among various mechanical transmissions, the transmission efficiency of spiral bevel gears is the highest, which has great economic benefits for all types of transmissions, especially high-power transmissions. The transmission parts required to transmit the same torque require the least space, and are more space-saving than belts and The space required for chain transmission is small; the spiral bevel gear transmission ratio is permanently stable, and stable transmission ratio is often the basic requirement for transmission performance in the transmission of various mechanical equipment; the spiral bevel gear works reliably and has a long life.
A collection of pictures of spiral bevel gears with diameters ranging from 10mm to 1600mm, modules from 1 to 36, and accuracy levels of spiral bevel gears ranging from GB5 to GB8. According to the different design methods, processing methods, and processing equipment of spiral bevel gears, spiral bevel gears can be divided into German Klingenberg spiral bevel gears, American Gleason spiral bevel gears, and Swiss Olincon spiral bevel gears. They are usually called Known as Klingenberg spiral bevel gears, Gleason spiral bevel gears and Olincon spiral bevel gears. There are some minor differences between these different types of spiral bevel gears, but the main parameters still have many similarities. According to the different application environments of spiral bevel gears, various parameters are also very different. According to the different use environments, spiral bevel gears can be divided into centrifugal separator series spiral bevel gears, vertical coal mill spiral bevel gears, Textile machinery series spiral bevel gears, reducer series spiral bevel gears, automobile variable speed transmission series spiral bevel gears, steel rolling machinery series spiral bevel gears, mining machinery series spiral bevel gears, wheel loader series spiral bevel gears, lateral mixer series spiral Bevel gears, DCY reducer spiral bevel gears, DBY reducer spiral bevel gears, universal milling head spiral bevel gears, wire drawing machine series spiral bevel gears, cement vertical mill spiral bevel gears, oil field drilling rig series spiral bevel gears, engineering machinery series Spiral bevel gears, high-frequency welded pipe spiral bevel gears, stainless steel welded pipe spiral bevel gears, pipe making machinery spiral bevel gears, cold bending forming machine series spiral bevel gears, hard tooth surface spiral bevel gears and other series of spiral bevel gears.
Spiral bevel gears are widely used in domestic and foreign oilfield petrochemical machinery, various machine tools, various mechanical processing equipment, engineering machinery, metallurgical equipment, steel rolling machinery, mining machinery, coal mining machinery, textile machinery, shipbuilding machinery, shipbuilding industry, aerospace, and forklifts. , elevators, reducers, aircraft manufacturing and many other industries. Spiral bevel gears are used in various mechanical equipment and show their excellent performance. They are popular among aerospace equipment manufacturers, shipyards, engineering machinery factories, metallurgical equipment factories, rolling steel spare parts factories, steel rolling machinery factories, steel rolling mills, etc. Metallurgical machinery factory, mining machinery factory, coal mining machinery factory, oil field petrochemical machinery factory, textile machinery factory, machine tool factory, equipment company, elevator company, aircraft manufacturer, reducer factory, coal mining machinery factory, light industrial machinery factory, steel rolling mill , steel rolling equipment plants, metallurgical equipment plants and other types of customers love it.
Spiral bevel gears and hypoid bevel gears are the main transmission methods used in automobile main reducers. What’s the difference between them?
The spiral bevel gear is shown in Figure 2(a). Its main and driven gear axes intersect at one point, and the intersection angle can be arbitrary. However, in most automobile drive axles, the main reducer gear pair is arranged vertically at a 90° angle. Way. Due to the influence of overlapping gear tooth end faces, at least two pairs of gear teeth mesh at the same time. Therefore, spiral bevel gears can withstand larger loads. In addition, the gear teeth do not mesh at the same time over the entire tooth length, but gradually change from tooth to tooth. One end continuously turns to the other end, making it work smoothly, and the noise and vibration are very small even when running at high speed.
The hypoid gear is shown in Figure 2(b). The axes of the main and driven gears do not intersect but intersect in space. The intersecting angles in space are often 90° angles and vertical. The driving gear shaft has an upward or downward offset relative to the driven gear shaft (referred to as upper offset or lower offset, respectively). When the offset is large enough, one gear shaft can pass by another gear shaft. In this way, compact bearings can be arranged on both sides of each gear, which is of great benefit to enhance the support stiffness, ensure the correct meshing of the gear teeth, and thereby increase the life of the gear. It is suitable for through-type drive axles.
Unlike the case of spiral bevel gears in which the helix angles of the main and driven gears are equal because the axes of the gear pairs intersect, the axis offset of the hypoid gear pair makes the helix angle of the driving gear larger than the helix angle of the driven gear. Therefore, although the normal modules of the hypoid bevel gear pairs are equal, the end face modules are unequal (the end face module of the driving gear is greater than the end face module of the driven gear). This allows the driving gear of a quasi-double-sided bevel gear transmission to have a larger diameter and better strength and stiffness than the corresponding driving gear of a spiral bevel gear transmission. In addition, because the diameter and helix angle of the driving gear of the hypoid bevel gear transmission are larger, the contact stress on the tooth surface is reduced and the service life is increased.
However, when the transmission ratio is small, the driving gear of the quasi-double-sided bevel gear transmission is too large compared to the driving gear of the spiral bevel gear. In this case, it is more reasonable to choose the spiral bevel gear.