RU1803756C - Impact test stand - Google Patents

Abstract

Purpose: testing products of large mass. SUBSTANCE: lever device for charging and discharging suspended shock force exciters (3) and platform (4) with the tested product ensures their deviation from the equilibrium position by the same amount in opposite directions and subsequent oncoming movement before impact. The device contains three two-arm levers. The lower ends of the first (8) and second (9) levers are connected respectively to the exciter and the platform, and the axes (10), (11) of their rotation are located on the uprights (1), (2). The axis (13) of rotation of the third lever (12) is located on the upper end of the first lever, the lower end is connected via a latch (14) to the lower shoulder of the first lever, and the upper end is connected to the drive (7). Levers (8), (9) are interconnected

Description

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Figure 1

The invention relates to a testing technique, and in particular, to stands for impact testing of large bulk products.

The purpose of the invention is to reduce the material consumption of the stand by reducing the impact loads on the supporting structures.

In FIG. 1 schematically depicts the described stand; figure 2 - shock force exciter with a suspension element and the first lever of the device for cocking and reset; Fig. 3 shows a platform with a suspension element and a second lever of a cocking and resetting device.

The stand contains a base with racks 1, 2, mounted with the possibility of impact, shock exciter 3 and platform 4 for installing the test product (not shown in Fig.), Suspended from racks using lever suspensions 5, 6, respectively, and device for charging and discharging the platform and exciters. The structure of this device includes a drive 7 (in particular, a hydraulic cylinder), the first and second two-arm levers 8.9, the turning axes 10.11 of which are located, respectively, on the posts 1, 2, and the lower ends are connected, respectively, with the exciter and the platform ,, the third two-arm lever 12, the rotation axis 13 of which is located on the upper end of the first lever 8, and the upper end is pivotally connected to the actuator 7, a latch 14, through which the lower end of the third lever 12 is connected by the lower shoulder of the first lever 8, and the hinge rod 15, interconnecting lower end the first and upper end of the second levers. The latch 14 includes a quick lock that is connected to a hook 16 located on the first lever 8 and is configured to release the hook when the lever reaches a predetermined angle of rotation. To control the impact parameters, a damper 17 is mounted on the stand structure, mounted on the striking organ of the exciter 3, a set of weights 18, which serves to regulate the mass of the exciter 3, and a pneumatic cylinder 19 fixed between the levers 8, 9.

The stand works as follows.

In the initial position, the third lever 12 is connected via a latch 14 to the hook 16 of the first lever 8. When the actuator cylinder 7 is pulled in, the levers 12 and 8 are turned clockwise, and the lever 9 is rotated due to the connection of its upper end with the lower arm of the lever 8 15, at the same angle counterclockwise. When turning the levers, the shock exciter

3 and platform 4 are cocked in the positions shown in dashed lines in Fig. 1. When the desired position is reached, the latch 14 engages, while the levers 12 and 8 are released and the shock exciter 3 and the platform 4 are accelerated towards each other and collide, and the lever 12 is held in its reached position by the hydraulic cylinder rod. With equal amounts of movement of the exciter and

platform with the product, which achieves, with their equal deviation from the equilibrium position and the equality of the mass, provided by the adjustment of the mass of the exciter with the help of loads 18, shock

impulse is not transmitted to the stand structures of the bench.

F o-rmul a. of the invention An impact test bench comprising a base, racks mounted with

the possibility of impacting the platform for installing the test product and the shock exciter suspended from the uprights, and a device for cocking and resetting, including a drive and a latch, which are different

the fact that, in order to reduce material consumption when testing products with a large mass by reducing shock loads on the supporting structures of the bench, the device for cocking and dumping is equipped with three two-arm levers, the axis of rotation of the first and second levers are placed on racks, the lower ends of these levers are connected respectively with shock exciter and platform, axis of rotation of the third lever

placed on the upper end of the first lever, the lower end is connected via a latch to the lower shoulder of the first lever, and the upper end is connected to the drive, while the lower end of the first and the upper end of the second

levers are interconnected by means of traction,

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