Views: 207 Author: Site Editor Publish Time: 2019-09-05 Origin: Site
The motorcycle consists of five parts: engine, transmission system, walking system, steering brake system and electrical instrumentation. Next we will mainly introduce the walking system and the steering brake system.
The function of the walking system is to support the weight of the entire motorcycle and the load, ensuring stable operation and comfortable ride. The walking system mainly includes a motorcycle frame, a front fork, a front shock absorber, a rear shock absorber, a wheel, and so on.
It is the skeleton of the entire motorcycle, welded by steel pipes and steel plates. It connects the engine, gearbox, fork, rear suspension, etc. to each other and has high strength and rigidity. Scooter-type always use spine-type stands with stamping and welding. In general, motorcycles use a welded steel frame, a cradle frame or a combination frame of steel plates and steel pipes. Some high-power engine motorcycles use a steel-welded double-cradle frame.
The front fork is the guiding mechanism of the motorcycle, it connects the stand organically with the front wheel. The front fork is composed of a front shock absorber, an upper and lower connecting plate, a direction column and so on. The direction column is welded with the lower joint plate, and it is set in the front casing of the stand. In order to make the direction column move flexible, an axial thrust ball bearing is arranged at the upper and lower shaft neck position, and the left and right front shock absorbers are connected together through the upper and lower plates to become a front fork.
The front shock absorber is used to attenuate the vibration caused by the impact load of the front wheel and keep the motorcycle running smoothly.
The rear shock absorber and the rear rocker arm of the stand constitute the rear suspension of the motorcycle. The rear suspension device is an elastic connecting device between the stand and the rear wheel, which bears the load of the motorcycle, reduces and absorbs the shock and vibration transmitted to the rear turn due to the uneven road surface.
The front wheels of motorcycles are guide wheels, and the rear wheels are drive wheels, they are all spoke wheels. The wheels are composed of inner and outer tires, rims, spokes, hubs, brake rims, bearings, and front and rear axles. The rim (steel ring) is rolled and welded by a steel plate. The hub is die-cast from aluminum alloy, and the brake rim is inlaid and integrally molded with flanges at both ends for mounting spokes. The spokes are similar in shape to bicycle strips for connecting the rim and the hub. The hub is equipped with a brake, the front wheel is also equipped with a worm gear and a speedometer, and the rear wheel is equipped with a drive mechanism.
(1) Steering: The front wheel and the handle cooperate to control the driving direction of the motorcycle. The handle is mounted on the upper plate, when the handle rotates around the direction column, the upper and lower plates are rotated, and the front wheel is rotated by the front shock absorber. The right of the handle is equipped with a throttle handle for controlling the opening of the carburetor throttle valve and a brake lever for controlling the front wheel brake. The left of the handle is provided with a grip and a handle for controlling the clutch. Rear view mirrors and various electrical switches are also mounted on the left and right of the handle. The handle and brake lever control the front wheel brakes, clutches and carburetor through the cable. The cable has different specifications. The brake and clutch use single-strand steel wire rope with 1×19 outer diameter ∮2～∮2.5mm. The carburetor uses single-strand steel wire rope with 1×7 outer diameter ∮1.2～∮1.5mm.
(2) Braking: Generally, the front wheel brake is controlled by the hand brake lever, and the rear wheel brake is controlled by the foot brake pedal. Motorcycle brakes are divided into two types: mechanical drum brakes and hydraulic disc brakes. The structure of the drum brake is similar to that of a car or a tractor. The brake block is die-casted by aluminum alloy with a friction brake pad attached thereto.
(3) The brake consists of a fuel tank, a plunger valve oil pump (both on the handle), a hydraulic oil pipe, a brake caliper, and a brake disc. The brake disc is fixed to the wheel and rotates with the wheel. When braking, hold the brake lever and move the plunger valve to push the hydraulic oil along the hydraulic oil pipe into the two cylinders of the brake caliper. Under the action of the pressure oil, the cylinder pushes the friction plate to clamp the brake disc from both sides, generating a large frictional resistance, forcing the wheel to stop rotating. When the brake is released, the pressure in the hydraulic circuit quickly drops back, and the cylinder drives the friction plate to return to the original position to release the brake.
Founded in 2008, JIAXING JUJIE HARDWARE TOOL CO.,LTD is located in Jiaxing, Zhejiang. It is a factory engaged in producing motorcycle bolts, motorcycle stand/lift and wheel chock, motorcycle tie down, motorcycle tool, and plastic can. If you are interested in our motorcycle tools, please contact us at any time.
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