At present, the brake system of Dune buggy generally uses the rear brake master cylinder to control the rear brake caliper, and the front brake master cylinder to control the left and right front brake calipers. On the one hand, the pipeline is complex, which is not conducive to installation and layout on Dune buggy, and the cost is high. On the other hand, when braking alone, especially when braking alone, the braking effect is poor, and it is difficult to meet the actual needs.
In view of the above defects of the prior art, the front and rear disc brake hydraulic system of the beach car is to provide a front and rear disc brake hydraulic system of the beach car.
The front and rear disc brake hydraulic system of an ATV is a front and rear disc brake hydraulic system of an ATV, including a front brake master cylinder, a front left brake caliper, a front right brake caliper, a rear brake master cylinder and a rear brake caliper. It is characterized in that it also includes a diverter valve, on which a front valve chamber and a rear valve chamber are arranged. The front port of the front valve chamber is sealed by a front plug, and the rear port of the rear valve chamber is sealed by a rear plug, The front valve chamber and the rear valve chamber are connected through a small diameter through hole, and a rear piston is installed in the rear valve chamber. The front end of the rear piston extends into the front valve chamber through the small diameter through hole and is fixedly connected to the rear end of the front piston. A front leather cup is installed at the front end of the front piston, and a rear leather cup is installed at the rear end of the rear piston. A first return spring is installed between the rear piston and the rear plug, The cavity wall of the rear valve chamber is equipped with a rear oil inlet that is connected to the outside world. The rear oil inlet is located on the front side of the rear cup, and is connected to the first outlet of the second three-way joint through a fourth oil pipe. The second outlet of the second three-way joint is connected to the rear brake caliper through a fifth oil pipe, and the inlet of the second three-way joint is connected to the rear brake master cylinder; The front valve chamber is equipped with a second return spring, which is sheathed on the rear piston and front piston. The chamber wall of the front valve chamber is equipped with a forward oil port and an oil outlet that are communicated with the outside world. The forward oil port is located on the front side of the front cup, and the oil outlet is located on the rear side of the front cup; The forward oil port is connected to the front brake master cylinder through a first oil pipe, the oil outlet is connected to the inlet of the first three-way joint, the first outlet of the first three-way joint is connected to the front left brake caliper through a second oil pipe, and the second outlet of the first three-way joint is connected to the front right brake caliper through a third oil pipe.
Using the above technical solution, when operating the front brake master cylinder, the forward oil port of the diverter valve enters oil, pushing the front piston and rear piston to move backward together, and pressing out the hydraulic oil located behind the front cup in the front valve chamber through the oil outlet, causing the front left brake caliper and front right brake caliper to brake simultaneously; When operating the rear brake master cylinder, the hydraulic oil flowing out of the rear brake master cylinder is divided into two paths. One path flows to the rear brake caliper to brake the rear brake caliper, and the other path flows into the rear valve chamber of the diverter valve through the rear oil inlet, causing the rear piston and front piston to move backwards together. At the same time as the front piston moves backwards, the hydraulic oil located behind the front cup in the front valve chamber is pressed out through the oil outlet, causing the front left brake caliper and the front right brake caliper to brake simultaneously. From this, it can be seen that on the one hand, the diverter valve of this utility model has a simple and compact structure, easy assembly, flexible and reliable movement of the front and rear pistons, and on the other hand, the pipeline layout is convenient and the production cost is low; Under the action of the diverter valve, when operating the front brake master cylinder, the front brake caliper can brake independently, while when operating the rear brake master cylinder