SU1180731A1 - Bed for testing frames of semi-trailers - Google Patents

Abstract

. TEST BENCH OF SEMI-TRAILERS FRAME, containing a base with an electric drive placed on it, a crank-beam mechanism loading device, a swinging traverse, a front pivot bearing and a load distributed uniformly on the frame under test, for example, a loaded semi-trailer platform, a wall. in order to increase the accuracy of reproduction of the dynamic dynamic loading of the frame of the semi-trailer, the center of the swing axis of the beam is aligned with the center of the roll of the semi-trailer, and for mutual The position of these centers is equipped with adjusting mechanisms installed at the ends of the traverse and the front pivot bearing. 2. Stand POP.1, I differ (in general, that the adjusting mechanisms are made screw.

Description

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The invention relates to testing equipment, and more specifically to stands for testing frames of automobiles, semi-trailers and trailers.

The purpose of the invention is to increase the reproducing point of the operational dynamic loading of the semi-trailer frame during bench tests.

FIG. 1 shows a stand, general VIEW} in FIG. 2 is a sectional view in FIG. in fig. 3 - mounting rack to the traverse.

The electric motor 1 is connected by hinged couplings to the gearbox 2, on the output shaft of the KOToporOj passing 5 through the support 3, the flywheel 4 is installed with a crank connected to the swinging crosshead 5 by the connecting rod 6. The crosshead is mounted on the rack 7. The front part of the test frame 8 is hinged 20. to the front support 9. The rear part of the frame is fixed to the traverse through the flares 10 at the place of the actual attachment of the cart. To regulate the mutual position of the center of the axis of the swing axis and the actual roll center of the semi-trailer on the front pivot bearing, an adjusting screw mechanism with a screw 11 and two screws 12 is installed, and

There are two adjusting screw mechanisms with a screw 13, a running nut 14, a pin 15, a lock nut 16, a washer 17 and a handle 18. Two platforms 19 with a load equal to the nominal one are used to create static and inertial dynamic loads on the frame. The stand is mounted on a cast base plate 20.

A movable hinge fixing at one point of the front part of the frame, alignment of the center of the swing axis of the traverse with the position of the center of the roll of the semi-trailer and smooth adjustment of the angular speed of swing of the traverse is advantageously distinguished by the fact that the static and dynamic loading of the frame elements as close as possible under real conditions, there are many possibilities for choosing the test mode. Tensometric studies of the frame of the MMZ-77 1B semi-trailer on the stand showed the similarity of the distribution of static and dynamic stresses to the results obtained by tensometric measurement of this frame under road conditions.

Claims (2)

I. TEST DAY STAND FOR SEMI-TRAILER FRAMES, containing a base with an electric drive placed on it, a loading device in the form of a crank-beam mechanism, a swinging beam, a front articulated support and a load distributed. evenly on the test frame, for example, a loaded platform of the semitrailer, characterized in that, in order to increase the accuracy of reproducing operational dynamic loads of the semitrailer frame, the center of the swing arm axis is aligned with the roll center of the semitrailer, and the stand is equipped with adjusting mechanisms for the mutual arrangement of these centers, mounted on the ends of the beam and the front articulated support. 2. The stand according to claim 1, characterized in that the adjusting mechanisms are made screw.