DOUBLE-CIRCUIT HYDRAULIC VALVE OF BRAKE SYSTEM Russian patent published in 2024 - IPC B60T11/10 B60T13/12 

FIELD: machinery.

SUBSTANCE: means for controlling actuators of machines, in particular hydraulic valves of dual-circuit brake systems, used in hydraulic drives of mining dump trucks, motor graders, scrapers, loaders and other mobile construction and road machines to control service brakes. The dual-circuit hydraulic valve of the brake system contains upper and lower housings, in which two sleeves with spring-loaded first and second spools located in them are installed in series and coaxially, and a pusher with a drive is installed to interact through a balancing element with the ends of the first and second spools. Moreover, each of the spools has working belts connecting the working cavities with the pressure and drain cavities, and the first and second spools are installed with the possibility of longitudinal movement from the initial position, in which the brake hydraulic lines are connected to the drain cavity through the working cavities and channels in the spools, in working position in which the hydraulic lines of the brakes are connected through the working cavities and channels in the spools to the pressure cavities, and vice versa. In this case, the pusher drive is equipped with a spring-loaded rod, coaxially installed between the balancing element and the pusher in the body bore with the possibility of longitudinal movement, and a hydraulic valve control cavity is formed between the end of the rod and the body.

EFFECT: expanding the versatility of using a hydraulic valve for controlling brake mechanisms when using electric hydraulic drives in the braking systems of mobile vehicles and increasing their reliability and operating efficiency.

1 cl, 1 dwg