PERFORMANCE TESTING APPARATUS FOR PARKING BRAKE IN A VEHICLE

摘要

An oil pump (4) for pumping oil filled in the oil pan (2) to provide a performance test device of the parking brake capable of performing a performance test of the parking brake; A pair of hydraulic valves 6 and 8 connected to the oil pump 4 to selectively determine a flow path of the pressurized oil pumped by the oil pump 4; A first cylinder (10) and a second cylinder (12) connected to the pair of hydraulic valves (6) and (8) by hydraulic lines (14) and (16), respectively, to operate according to hydraulic pressure; The hydraulic lines 14 and 16 are opened between the first cylinder 10 and the hydraulic valves 6 and 8 and between the second cylinder 12 and the hydraulic valves 6 and 8, respectively. A pair of flow control valves 18 and 20 for controlling the flow rate of the pressure oil circulated to the 14 and 16; A wire 22 connecting the first cylinder 10 to the brake shoe 24 of the parking brake; A first rod display unit 26 which is opened between the first cylinder 10 and the wire 22 and displays the physical force acting on the brake shoe 24 in numerical value; A pair of rotating rods 34 and 36 fixedly connected to the drum 28 of the parking brake and installed rotatably on the pair of supports 30 and 32; A first link 38 hinged between the rotary rods 34 and 36 and the second cylinder 12 on one side; A second rod display unit 40 which is opened between the first link 38 and the second cylinder 12 to display numerically the rotational torque acting on the one side rotating rods 34 and 36; A second opening that is hinged between the other rotating rods 34 and 36 and the third rod display unit 42 so as to numerically display the rotating torque acting on the other rotating rods 34 and 36; It is composed of a link (44).