Parking braking system and vehicle

Abstract

The embodiment of the invention discloses a parking braking system and a vehicle. The parking braking system comprises an oil tank, a braking device, a first valve assembly and a second valve assembly; the braking device is connected with an oil tank through an oil supply path and an oil return path; the first valve assembly is arranged on the oil supply path and comprises a first electromagnetic valve and a first one-way valve; the first one-way valve is connected with the first electromagnetic valve; the first one-way valve is in one-way conduction in the direction from the oil tank to the braking device. the second valve assembly is arranged on the oil return path and comprises a second electromagnetic valve and a second one-way valve; the second one-way valve is connected with the second electromagnetic valve; and the second one-way valve is in one-way conduction in the direction from the braking device to the oil tank. According to the parking braking system and the vehicle, the amount of a braking medium flowing out of the braking device during driving can be reduced; the driving safety of the vehicle is improved; in addition, the amount of the braking medium flowing into the braking device after parking braking can be reduced; and thus the safety of the vehicle during parking is improved.

Description

technical field [0001] The embodiments of the present application relate to the technical field of parking brakes, and in particular to a parking brake system and a vehicle. Background technique [0002] The braking system is one of the important components of the automobile, which is directly related to the overall performance of the vehicle and the safety of the driver's life and property. [0003] In related technologies, when the vehicle is running, if the solenoid valve fails unexpectedly, the hydraulic oil in the oil cylinder can flow directly back into the oil tank, which reduces the reliability of the force on the oil cylinder and increases the risk of the brake shoe opening. Thereby reducing the use reliability of the parking brake system and endangering driving safety. [0004] Moreover, after the vehicle is parked, the hydraulic oil in the oil tank tends to flow into the oil cylinder, which causes the oil cylinder to be forced to pull the brake shoes, which incre...

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Problems solved by technology

[0003] In related technologies, when the vehicle is running, if the solenoid valve fails unexpectedly, the hydraulic oil in the oil cylinder can flow directly back into the oil tank, which reduces the reliability of the force on the oil cylinder and increases the risk of the brake shoe opening. Thereby reducing the reliability of the parking brake system and endangering driving safety

[0004] Moreover, after the vehicle is parked, the hydraulic oil in the oil tank is easy to flow into the oil cylinder, so that the oil cylinder is forced to draw the brake shoe, which increases the risk of accidents such as the vehicle slipping downhill, and reduces the reliability of the parking brake system.

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