First, the working principle of the scooter transmission system
The principle of the scooter transmission mechanism is that the two Puli discs are connected by a transmission belt. When the engine speed is running at idle speed, the two Puli discs and the transmission belt are in a loose state and cannot drive the motorcycle forward. When the engine speed increases, the two Puli discs are tightly connected to the belt by the centrifugal force, and the transmission ratio changes. The greater the engine speed, the greater the transmission ratio change, and the faster the vehicle speed.
The principle diagram of the scooter transmission mechanism↓↓↓
Second, the scooter transmission system common faults
The common faults of the scooter drive system are as follows:
1. Pre-Puli beads wear;
Failure principle: After the Pulizhu wears, the centrifugal force generated by the Pulizhu changes with the engine speed decreases, and sometimes it will not get back in the Pulizhu trough, and finally the unclear phenomenon occurs under the idling condition.
Fault phenomenon: The vehicle will also move forward when the motorcycle is idling.
2. The front Ply bushing is worn;
After the front quilt cover is worn, the eccentric operation will occur due to the entire Ply disk. The direct consequence is that the engine working noise is seriously abnormal, just like the sound of the engine crankshaft is similar.
3, after the Puli wear;
After the Puli block and the Puli plate are worn, there will be phenomena such as unsatisfactory acceleration and increased fuel consumption. After the Puli block spring breaks, the separation will be unclear and the vehicle will move forward under idle speed. If the large spring of the Puli is softened or loosened, the vehicle will start to tremble.
4. The drive belt is broken;
Because the front and rear Ply disk are not properly maintained, the motorcycle will still be forced to work under severe wear and tear, and eventually the belt will be broken.
Third, the maintenance of the scooter transmission system;
After the cover of the motorcycle transmission cover is covered, because there is a wind guide plate on the front Puli plate, a directional air flow will be generated in the transmission case, one is to dissipate heat from the transmission system, and the other is to blow out the dust generated in the operation of the transmission system. Gearbox to prevent excessive wear on the inside.
Many inferior motorcycles are assembled vehicles, and there are no air ducts on the engine belt cover. Some are also very simple, which will generate a large amount of dust-containing air into the gearbox to accelerate the aging of the internal parts. Regular motorcycle air ducts are usually connected inside the frame steel pipe, or some have a simple filter element at the air guiding port to ensure the cleanliness of the air entering the gearbox.
The product that connects the air duct to the frame tube ↓↓↓
Products with filter elements at the air inlet of the gearbox↓↓↓
Therefore, the maintenance of the engine transmission system should periodically disassemble the transmission box cover and clean the dust inside. If some repairmen are too troublesome, the air guiding port can be dismantled regularly, the vehicle is started, and the air gun is used to align with the air guiding port. Ash operation, especially for scooters that are driving on earth roads for a long time, should be strengthened.
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