Motorcycle steering and braking system

(1) Steering: The front wheels and handlebars cooperate to control the direction of the motorcycle's travel. The handlebar is installed on the upper connecting plate. When the handlebar rotates around the steering column, the upper and lower connecting plates rotate accordingly, and the front wheels rotate left and right through the front shock absorber. The right end of the handlebar is equipped with a throttle handle that controls the opening of the carburetor throttle valve and a brake handle that controls the front wheel brake; The left end is equipped with a grip and handle for controlling the clutch. The left and right ends of the handlebar are also equipped with rearview mirrors and various electrical switches. The handle and brake handle control the front wheel brake, clutch, and carburetor through steel cables. There are different specifications of steel cables, which are used for braking and clutch × 19 outer diameter Φ 2~Φ 2.5mm single strand steel wire rope, 1 for carburetors × Single strand steel wire rope with an outer diameter of less than 1.2 to less than 1.5 millimeters.
(2) Braking: Generally, the front wheel braking is controlled by manually pressing the brake handle, while the rear wheel braking is completed by stepping on the brake pedal. There are two types of braking devices for motorcycles: mechanical drum brakes and hydraulic disc brakes. The structure of drum brakes is similar to that of cars and tractors. The brake shoes are made of aluminum alloy die-casting, with friction brake pads attached to them. The brake arm rotates the brake cam and pushes the brake shoes apart to achieve braking.
The brake is composed of oil tank, plunger valve oil pump (all on the handlebar), hydraulic oil pipe, brake caliper, brake disc, etc. The brake is staggered and fixed together with the front fork guide, which is a fixed part of the braking device. The brake disc is fixed to the wheel and rotates with the wheel. When braking, grip the brake handle tightly, and the plunger valve moves to push hydraulic oil along the hydraulic oil pipe into the two oil cylinders of the brake caliper. Under the action of pressure oil, the oil cylinder pushes the friction plates to tightly clamp the brake disc from both sides, generating significant frictional resistance and forcing the wheels to stop rotating. When the brake lever is relaxed, the pressure in the hydraulic oil circuit quickly drops back, and the oil cylinder drives the friction plate to return to its original position, releasing the brake.