SU1218199A1 - Arrangement for cooling vehicle friction brake - Google Patents

Description

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The invention relates to mechanical engineering, in particular to transport engineering, where it can be used in devices for cooling automobile brakes.

The purpose of the invention is to increase the cooling efficiency by providing automatic supply of cooling air to the brake drum.

Fig. 1 shows a device for cooling a vehicle brake; in fig. 2 - bimetallic membrane ring; Figs. 3.4 and 5 show the position of the petals of the membrane ring and air intake blades with different thermal conditions of the drum;

The device contains a brake drum 1, mounted on the disk 2 wheels. A bi-metal membrane ring 3 is installed on the drum. It is made in the form of a disk with petals 4 B of the ventilation holes of the disk evenly spaced on its outer diameter and placed with the possibility of reciprocating movement of air intake blades 5j connected by means of leads 6 with petals 4 , There are brake pads 7 with friction linings 8 inside the brake drum. The device operates as follows.

When the vehicle moves, the temperature of the 1 working elements reaches the PP-2 and the deformation of the bimetgle-lining membrane ring and its lobe

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Cove does not occur. The brake is cooled due to that part of oncoming air, which falls on the ribbed surface of the drum, through the ventilation windows (Fig. 3),

With frequent braking of the car, the thermal condition of the brake drum changes dramatically and its temperature can reach 180-200 0. At this temperature, the bimetallic petals bend outwards and pull the air intake blades 5 through the leads 6 (Fig. 4). The extension of the blades beyond the wheel disk provides a significant flow of air to the surface of the brake drum 1 and normalizes its temperature. After the temperature drops to 70-80 ° С, the petals and blades will occupy the initial position.

During prolonged braking, for example, on puffy descents, the temperature of brake drum 1 can exceed 180-200 ° C. In this case, the petals will be deformed first, and then i; of the bimetallic membrane ring 3 itself, which will provide air intake

blades 5 of the ventilation windows of the wheel to the maximum (Fig. 5). The ribbed surface of the brake drum 1 will receive more than in the previous case, the amount of cooling air. After falling

The temperature of the brake drum 1. Petal and the membrane ring will occupy the initial position.

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Branch PPP Patent, Ulsgorod, ul "Project, 4

Claims (1)

DEVICE FOR COOLING A FRICTION BRAKE OF A VEHICLE, comprising a brake drum mounted on a wheel disk with ventilation windows, air intake blades mounted in the ventilation windows, and a drive for moving them kinematically connected to the air intake blades, characterized in that, in order to increase cooling efficiency by providing automatic supply of cooling air to the brake drum, depending on its temperature, the drive for moving the air intake blades is made in de placed on the brake drum disc of the bimetallic material with evenly spaced on the outer diameter lobes and each lobe of the air intake is associated with a petal of the bimetallic disc and mounted for movement relative to vozvratnopostupatelnogo ventilation window. 218199 1,121