Why is the scooter belt driven?

The maintenance cost of the pedal is higher than that of the straddle and curved beam because the scooter is infinitely variable or has no gear. The characteristics of the stepless transmission of the scooter: It is necessary to change the transmission ratio by the two sides of the front drive disc and the rear clutch disc friction belt to realize the start, acceleration and deceleration. There are several advantages to using a belt instead of a chain:

1. The noise is small.

2. Do not adjust the tightness.

3. Easy to replace.

4. The transmission is stable, eliminating the vibration damping rubber in the rear hub.

First, the advantages and disadvantages of belt drive:

1. Advantages:

1 to mitigate shock, absorb shock, less noise, low cost, convenient maintenance and repair;

2 Change the transmission ratio.

Disadvantages:

1 belt drive is easy to slip, the transmission ratio is not accurate

2 poor heat resistance, poor resistance to overload, easy to aging

3 The transmission damping is large, especially when the vehicle is cold 4, the bearing is subjected to excessive lateral force.

The structural characteristics of the belt:

Its working surface is two oblique sides, and the inner layers of many belts are toothed, which is designed in consideration of the force of the belt when it is in the wrap angle position. When the belt is moving, the outer layer is stretched, and the inner layer is mainly subjected to the pressing force. Therefore, the inner layer of the belt is formed into a tooth shape, which is more suitable for the force of the belt in these working positions, thereby prolonging the belt. Service life.

To be simple, the advantages of belt transmission are wide range of center distance variation, simple structure, stable transmission, buffer load and safety protection. The disadvantages are large outer diameter, low efficiency, inaccurate transmission ratio and short service life.

In addition, the belt drive, the transmission ratio is not accurate but can be overload protected. Gear drive with precise transmission ratio but no overload protection. The gears can be reversed and the belts are not. Belt drive maintenance is simple

Second, the chain transmission features

The biggest advantage of the chain drive is its low cost and wide applicability. When the engine is braking, it can absorb a part of the vibration due to the many gaps between the links. The disadvantage is that the friction of the chain and the gear is easy to loosen the chain, the gear is worn, and the noise generated is high.

The direction of rotation of the chain and the direction of advancement of the car are as long as the generated torque is only to lift the front of the car, which has little effect on high-speed driving.

Third, there are the same black swan-like exceptions

Scooters are mostly belt drives, but they do not mean that there are no other transmission methods, such as chains or even shaft drives. The previous two continents of the New Continent Monster 50 were chained. In the gearbox, the oil was lubricated and the life should be long. A long time ago, the star 50, Dawn 50 is the shaft drive, Mulan 50, the celebrity 100 is the chain drive, but unfortunately has long been discontinued, Honda's retro turtle 50, there is a foot-mounted gear, four-speed automatic clutch chain Driven, I don't know much about it, but because of the design of the scooter, the belt drive is still mainstream.

The BMW C600 and C650GT, the engines of the two cars are also 650CC.

It uses the CVT belt section to connect the engine to the transmission section. The transmission part uses a chain drive and is lubricated by the oil pool, and the sound is small. The problem of low-speed slip and jitter of the scooter CVT belt transmission part is solved simply, and the CVT part is designed to be an intermediate part requiring a certain speed.

Hydraulic Press

How does a hydraulic press work? Pascal's Law in action
In a hydraulic press, a modest mechanical force (F1) is applied to a small area (A1). As the fluid is moved in one location, it inevitably moves elsewhere within that channel. Then a larger area (A2) generates a magnified mechanical force (F2). The force is transmitted via hydraulic pressure generated by the initial effort, F1.

Application areas are almost limitless. Usually, a laboratory hydraulic press will be used to prepare samples for analysis by compressing them into pellets or thin films. The particles are forced together, creating a homogenous sample ideal for spectroscopic examination.

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