Drive Gear

1.Involute Straight Toothed cylindrical Gear
A cylindrical gear with involute tooth profile is called an involute straight toothed cylindrical gear. In other words, it is a cylindrical gear with teeth parallel to the axis of the gear.

2.Involute Helical Gear
An involute helical gear is a cylindrical gear with teeth in the form of a helix. It is commonly referred to as a helical gear. The standard parameters of the helical gear are located in the normal plane of the teeth.

3.Involute Herringbone Gear
An involute herringbone gear has half of its tooth width as right-hand teeth and the other half as left-hand teeth. Regardless of the presence of slots between the two parts, they are collectively referred to as herringbone gears, which come in two types: internal and external gears. They have the characteristics of helical teeth and can be manufactured with a larger helix angle, making the manufacturing process more complex.

4.Involute Spur Annulus Gear
A gear ring with straight teeth on the inner surface that can mesh with an involute cylindrical gear.

5.Involute Helical Annulus Gear
A gear ring with straight teeth on the inner surface that can mesh with an involute cylindrical gear.

6.Involute Spur Rack
A rack with teeth perpendicular to the direction of movement, known as a straight rack. In other words, the teeth are parallel to the axis of the mating gear.

7.Involute Helical Rack
An involute helical rack has teeth that are inclined at an acute angle to the direction of motion, meaning the teeth and the axis of the mating gear form an acute angle.

8.Involute Screw Gear
The meshing condition of a screw gear is that the normal module and the normal pressure angle are equal. During the transmission process, there is relative sliding along the tooth direction and tooth width direction, resulting in low transmission efficiency and rapid wear. It is commonly used in instrument and low-load auxiliary transmissions.

9.Gear Shaft
For gears with a very small diameter, if the distance from the keyway bottom to the tooth root is too small, the strength in this area may be insufficient, leading to potential breakage. In such cases, the gear and the shaft should be made as a single unit, known as a gear shaft, with the same material for both the gear and the shaft. While the gear shaft simplifies assembly, it increases the overall length and inconvenience in gear processing. Additionally, if the gear is damaged, the shaft becomes unusable, which is not conducive to reuse.

10.Circular Gear
A helical gear with a circular arc tooth profile for ease of processing. Typically, the tooth profile on the normal surface is made into a circular arc, while the end face tooth profile is only an approximation of a circular arc.

11.Involute Straight-Tooth Bevel Gear
A bevel gear in which the tooth line coincides with the generatrix of the cone, or on the hypothetical crown wheel, the tooth line coincides with its radial line. It has a simple tooth profile, easy to manufacture, and lower cost. However, it has lower load-bearing capacity, higher noise, and is prone to assembly errors and wheel tooth deformation, leading to biased load. To reduce these effects, it can be made into a drum-shaped gear with lower axial forces. It is commonly used in low-speed, light-load, and stable transmissions.

12.Involute Helical Bevel Gear
A bevel gear in which the tooth line forms a helix angle β with the generatrix of the cone, or on its hypothetical crown wheel, the tooth line is tangent to a fixed circle and forms a straight line. Its main features include the use of involute teeth, tangential straight tooth lines, and typically involute tooth profiles. Compared to straight-tooth bevel gears, it has higher load-bearing capacity and lower noise, but generates larger axial forces related to the direction of cutting and turning. It is commonly used in large machinery and transmissions with a module greater than 15mm.

13.Spiral Beval Gear
A conical gear with a curved tooth line. It has high load-bearing capacity, smooth operation, and low noise. However, it generates large axial forces related to the gear’s direction of rotation. The tooth surface has local contact, and the effects of assembly errors and gear deformation on biased load are not significant. It can be ground and can adopt small, medium, or large spiral angles. It is commonly used in medium to low-speed transmissions with loads and peripheral speeds greater than 5m/s.

14.Cycloidal Bevel Gear
A conical gear with cycloidal tooth profiles on the crown wheel. Its manufacturing methods mainly include Oerlikon and Fiat production. This gear cannot be ground, has complex tooth profiles, and requires convenient machine tool adjustments during processing. However, its calculation is simple, and its transmission performance is basically the same as that of the spiral bevel gear. Its application is similar to that of the spiral bevel gear and is particularly suitable for single-piece or small-batch production.

15.Zero Angle Spiral Bevel Gear
The tooth line of the zero angle spiral bevel gear is a segment of a circular arc, and the spiral angle at the midpoint of the tooth width is 0°. It has slightly higher load-bearing capacity than straight-tooth gears, and its axial force magnitude and direction are similar to those of straight-tooth bevel gears, with good operational stability. It can be ground and is used in medium to low-speed transmissions. It can replace straight-tooth gear transmissions without changing the support device, improving transmission performance.