SU1390101A2 - Bench for testing brakes of wheeled vehicles - Google Patents

Abstract

The invention relates to the testing and diagnosis of the technical condition of vehicles. The purpose of the invention is to ensure the versatility of the stand. The horizontal and vertical contact pads 8 and 9 of each stop contain a drive having an electric motor and a worm gear consisting of a screw 16 located on the motor shaft and a worm gear 18 fixed on the nut 19. A nut 19 is threadedly connected to the nut 19. rod 20. Each platform 8 and 9 has on its plane the limit switch of an electric motor. 5 il. € (L

Description

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The invention relates to the field of diagnosing the technical condition of vehicles, namely, stands for measuring parameters of brake systems, and is an improvement of the invention by the author. St. No. 1293055.

The purpose of the invention is to ensure the versatility of the stand. . .

FIG. 1 shows a stand with fixing devices, general view; in fig. 2 - fixation device, general view; in fig. 3 - drive vertical pads, longitudinal section; in fig. 4 - the same, cross section; in fig. 5 is an electrical control circuit of the drive of the contact pad.

The stand has a frame 1 on which rollers 2 and 3 are mounted and devices 4 for fixing the vehicle's bridge 5 (Fig. 1 and 2) mounted by wheels 6 on rollers 2 and 3. Each fixation device contains (Fig. 2) an emphasis 7 with horizontal 8 and vertical 9 contact pads, with the stop 7 made in the form of an intermediate lever, one end of which is pivotally connected to the end of the connecting rod 10, and the middle part is connected to the end of the connecting rod 11 and the stem 12 of the power cylinder 13. On the frame 1 there is a stopper 14 for limiting moving intermediate stop 7. Contact-to the site a has a drive (fig. 3 and 4), including an electric motor 15, a worm gear, consisting of a screw 16 located on the motor shaft and connected to the electric motor 15 by a clutch 17. The screw 16 is in engagement with the worm wheel 18, fixed to the nut 19, which is threadedly connected to the stem 20 of the pad 8 or 9. The rod 20 is connected to the stopper 21, which prevents the rod 20 from turning and allows for the reciprocating movement of the pad. On the plane of the installation site there is a limit switch consisting of a spring-loaded platform 22 and a contact sensor 23. The actuators of all the contact areas are similar.

The stand works as follows.

When installing the wheels of 6 tested vehicle brakes on rollers 2 and 3, the rod 12 si

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The each cylinder 13 of each locking device is in its lowest position, and the stop 7 is in the initial position. The contact pads are in the extreme positions: vertical - in the lowermost one, and horizontal - in the extreme right (Fig. 2). After the wheels 6 have been mounted, the power cylinder 13 is turned on, moving the rod 12 to the extreme position and raising the stop 7 until it touches the stopper 14. When the stop 7 touches the stopper 14, the connecting rod 10 contacts the surface of the stopper 14 which is perpendicular to the surface in contact with the stop 7 In this extreme position, the rod 12 is at a right angle to the stop 7. The presence of two connecting rods 10 and 11 and a stopper 14 increases the rigidity of the design of the fixation device.

After the stops 7 of each locking device are installed in the working position, the control action of the toggle switch 24 (Fig. 5) with the closing contacts closes the power supply circuit of the electric motor 15. At this moment the contact sensor 23 with the opening contacts is in the initial position, i.e. its contacts are closed, and the motor rotation direction switch 25 is in a position where, due to the rotation of the motor shaft, the pad motor of the contact pad must move before it touches the vehicle bridge 5. When the power circuit closes with the con tacts of the toggle switch 24, the electric motor 15 starts working, rotation through the coupling 17, the worm to 16 and the worm gear 18 is transmitted to the nut 19, which tends to rotate the rod 20 of the contact pad. Since the rod 20 cannot rotate due to the presence of the stopper 21, it moves towards the vehicle bridge 5 before the spring pad 22 contacts the vehicle bridge. At the moment of contact, the contacts of the sensor 23 are opened, and thus the supply circuit of the electric motor - body 15 is opened. The movement of the rod 20 of the contact pad is stopped. Thus, the technological gaps between the contact pads and the vehicle bridge are eliminated. The gaps for all contact pads are eliminated in a similar way.

After testing the control of the toggle switch 24, the power supply circuit of the electric motor 15 is opened. The switch 25 is set to the position where, due to the rotation of the electric motor shaft, the rod of the contact pad should move to its extreme initial position. After that, the rod 12 of the power cylinder 13 of each locking device is moved to the lowest position, and the stop 7 is moved to its original position. After leaving the bridge and the contact area, the contacts of the sensor 23 are also in the initial position, i.e. his contacts are closed. In the initial position of the stop 7 by the control actions of the toggle switch 24, the rod 20 of the contact pad is set to its extreme position. Then, the contacts of the switch 25 are switched. Thus, the drive of the contact pad is prepared for subsequent work.

Claims (1)

Invention Formula Stand for testing the brakes of wheeled vehicles, according to ed. St. No. 1293055, characterized in that, in order to ensure the versatility of the stand, each contact area is movable relative to the intermediate lever and provided with a drive for moving it, including a threaded rod mounted perpendicular to the plane of the contact area, mounted on the intermediate lever with the possibility of axial movement, fixed against rotation and mated with an axially secured nut, which is a worm gear coupled to a worm on an electric motor shaft, an insulating power circuit of which includes a limit switch, cooperating with a pad, a spring-loaded relative to the screw rod. FIG. 2 v TO f Have 75 Ei ABOUT -