[The working principle of gear transmission]
Gear transmission is a mechanical transmission that utilizes gear teeth of two gears to mesh with each other to transmit power and motion. According to the relative position of the gear axis, it is divided into parallel-axis cylindrical gear transmission, cross-shaft conical gear transmission and inter-axle helical gear transmission. With compact structure, high efficiency, long life and other characteristics. Gear transmission refers to the device that uses the teeth of the main and driven wheels directly to transmit motion and power. Among all the mechanical transmissions, gear transmission is the most widely used and can be used to transmit the motion and power between two axes that are not far from each other.
The characteristics of gear transmission are: smooth gear transmission, accurate transmission ratio, reliable work, high efficiency, long service life, and large power, speed, and size range. For example, the transmission power may be as small as several hundred thousand kilowatts; the speed may be as high as 300 m/s; and the gear diameter may be from several millimeters to more than twenty meters. However, special gear is needed to make gears, and meshing transmissions can generate noise.
[Guidelines for gear transmission design]
1. Closed gear transmission It is known from practice that, in a closed gear transmission, it is usually to ensure the contact surface fatigue strength of the tooth surface. However, for gears with high tooth surface hardness and low strength of the tooth core (such as gears quenched with carburizing 20 and 20Cr steel) or gears with relatively brittle materials, the bending fatigue strength of the root is usually adopted. If both gears are hardened and the hardness of the tooth surface is the same, it depends on the situation. Larger power transmissions, such as closed gear drives with input power exceeding 75 kW, generate a large amount of heat, which can easily lead to poor lubrication and gear-to-pin cementation damage. In order to control the temperature rise, the heat dissipation capacity should also be calculated.
2. Open-type gear-driven open (half-open) gear transmissions should be calculated based on the criteria of ensuring the wear resistance of the tooth surface and the resistance to fracture of the tooth root. However, as described above, the calculation method for the wear resistance of the tooth surface is as follows. So far it is not perfect enough, so open (semi-open) gear drive, only to ensure the root bending fatigue strength as a design criterion. In order to extend the life of open (semi-open) gear drives, the calculated modulus can be appropriately increased as required. As already mentioned, the dimensions of the rims, spokes, hubs, etc. of gears are usually designed only for structural purposes and strength calculations are not performed.
Xiao Bian concludes: The above introduced the gear transmission for everyone, hoping to help everyone. For more relevant knowledge, please continue to pay attention to this website information platform. Follow-up will present more exciting content for everyone.
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1.Application : For auto parts
2.Dimension: Customized dimension, OEM & ODM
3.Material: A6063, A6061, A3003 and other series alu alloy
4.Suface treatment: Anodizing, polishing, turning ,power coating, mill finish etc
5.Equipment: CNC ,extruding machine, cold drawn machine, heating oven, straightening machine, cutting machine
|
OD |
OD Tolerance |
ID Tolerance |
Roundness |
Straightness |
Circular run-out |
|
φ16-20 |
±0.02 |
±0.02 |
0.01↓ |
0.015↓ |
0.05↓ |
|
φ20-30 |
±0.02 |
±0.02 |
0.01↓ |
0.015↓ |
0.05↓ |
|
φ30-50 |
±0.05 |
±0.05 |
0.02↓ |
0.020↓ |
0.08↓ |
|
φ50-80 |
±0.15 |
±0.10 |
0.05↓ |
0.025↓ |
0.10↓ |
6. STANDARD PACKING:Wooden case/carton
7. Trade Terms
1. Payment: 30% T/T in advance, 70% balance pay before delivery. L/C at sight.
2. Delivery time: 20 days after deposit receiverd. If opening mould, plus 7-10 days.
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4. FOB Port: Shanghai
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