SU1604723A1 - Limiter of crane cargo-lifting capacity - Google Patents

Abstract

The invention relates to lifting machines, is designed to protect the structural elements from the effects of loads exceeding the maximum permissible from the point of view of efficiency and strength, and improves the reliability of the device. This is achieved by the fact that the means of attachment to the hook of the lifting machine is made in the form of a plate 1, in which a rod 3 with thrust protrusions 4 is mounted for reciprocating movement. Two shoulders levers 9 are installed on the plate 1 on both sides of the rod 3, and gripping elements 14 are suspended with the possibility of moving in a vertical plane on the plate 1 between the double-armed levers 9 and the bar 3. Moreover, the thrust protrusions 4 of the bar rest on the gripping elements 14, which in turn rest on the lower shoulders 11 of the levers 9. 1 Il.

Description

The invention relates to lifting machines and is designed to protect the structural elements from the effects of loads exceeding the maximum permissible from the point of view of efficiency and strength, and can be mainly used to dislodge wall coverings from the throat of converters using a core.

The aim of the invention is to increase reliability.

The drawing shows the limiter, a general view in section.

The stopper comprises a plate 1, in which a rod 3 with stop lugs 4 is mounted in a through vertical groove 2 with the possibility of reciprocating movement.

In the lower part of the rod 3 axis 5 is connected to the bark 6, which by means of the restrictive chain 7 is connected to the plate 1. On the sides of the rod 3 on the plate 1 on the axis x 8

from contact with the gripping elements 14, after which the rod 3 falls, moving downward in the through vertical groove 2. Together with the barbed 3 down, the length of the restriction chain 7 moves the measles 6. After leaving the contact with the gripping elements, 14 thrust projections 4 under the action of the force of the compressed block 16 springs two shoulders levers 9 will take the starting position.

10 Such a position of the limiter is inoperative, since the kinematic chain between the rifle and the crane hook is broken (chain 7 performs only the role of a movement limiter and is not designed for any significant load, which guarantees that it is impossible for a crane to exceed the rated load capacity.

To return the limiter to the outcomes with the possibility of rotation, a double 20 ”(working) position is set up; the lower arms are lowered to form the upper 10 differently up to any support surface.

bottom 11 shoulders. Near the lower arms 11 double shoulders 9 with the ability to move along the guide groove 12 in a vertical plane, axes 13 freely engage the gripping elements 14, on which the thrust projections 4 of the rod 3 are supported. With a gap to the gripping elements 14, limit stops are mounted to the gripping elements 14 15. The gripping elements rest on

ness (floor of the span, support or barrel converter, etc.). After the stop of the bark 6 into the bearing surface, the rod 3 begins with further lowering of the plate 1 by lowering the crane hook to move in the vertical through groove 2 upwards, while the abutting protrusions 4 abut against the gripping elements 14 and begin to move them upwards. He directed the lower shoulders of 11 two-arm levers 9, and the upper 30 W-grooves 12 gripping elements 14

The arms of the 10 two-arm arms 9 are interconnected by means of an elastic element 16, for example a spring unit.

In the upper part of the plate 1 there is a figured hole 17 for mounting (hanging) the device on a hook (not shown) of the crane.

The initial (working) position of the device corresponds to the above.

The limiter works as follows.

The stopper for the figured hole 17 is suspended from a hook (not shown) of the crane and transported, for example, to the converter throat for performing a scuff disruption operation. Measles 6 are brought under the wall, when it is lifted by a crane hook, it is disrupted.

In this case, the force developed by the crane and not exceeding the established force of the spring unit is transmitted from the hook through plate 1, axis 8, lower shoulders 11 double-arm levers 9, gripping elements 14, thrust protrusions 4, pole 3, axis 5 on measles 6.

When the force exceeds the force of the spring block 16, the two shoulders levers 9 rotate on axles 8 and the upper shoulders 10 move one towards the other, and the lower shoulders 11 diverge in opposite directions until the protrusions 4 of the rods 3 come out

they are moved relative to the axles 13 installed in them. The stop-stops 15 prevent the gripping elements 14 from turning around the axes 13 when the thrust projections 4 move with the bar 3 upward. 35 The gripping elements 14 are moved until the thrust protrusions 4 of the rods 3 come out of contact with the gripping elements 14, which, under the action of their own weight, lower themselves into the lower initial position. This restores the force kinetic relationship, the limiter is brought to its original (working) position and can be used for further work. It should be noted that the restoration of the kinematic connection, i.e., bringing the limiter back to its original position, is carried out without the expense of manual labor and the use of additional mechanisms.

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Claims (2)

 Invention Formula A crane limiter containing suspension means to a lifting mechanism, two-arm arms hinged on it, one of the arms of which is connected by elastic elements and a hook mounted for reciprocating relative to the suspension means, made with a curvilinear working surface from contact with the gripping elements 14, after which the rod 3 falls, moving downward in the through vertical groove 2. Together with shchtanga 3, the bark 6 is moved down the length of the restrictive chain 7. After leaving the contact with the gripping elements 14 thrust protrusions 4 under the action of the force of the compressed spring block 16, the two shoulders levers 9 will take the initial position. 0 This position of the limiter is inoperative, since the kinematic chain between the rifle and the crane hook is broken (chain 7 performs only the role of a movement limiter and is not designed for any significant load, which guarantees the impossibility of the impact on the crane load exceeding the nominal capacity. To return the limiter to its initial position (working), its position is lowered with a valve up to any support on any supporting surface, and its position is lowered by a crane to any support surface (filling floor, support or barrel of the converter, etc.). . P.). After the stop of the bark 6 into the bearing surface, the rod 3 begins with further lowering of the plate 1 by lowering the crane hook to move in the vertical through groove 2 upwards, while the abutting protrusions 4 abut against the gripping elements 14 and begin to move them upwards. Guide grooves 12 gripping elements 14 Miscellaneous grooves 12 gripping elements 14 they are moved relative to the axles 13 installed in them. The stop-stops 15 prevent the gripping elements 14 from turning around the axes 13 when the thrust projections 4 move with the bar 3 upward. The gripping elements 14 are moved until the thrust protrusions 4 of the rods 3 come out of contact with the gripping elements 14, which, under the action of their own weight, lower themselves into the lower initial position. This restores the force kinetic relationship, the limiter is brought to its original (working) position and can be used for further work. It should be noted that the restoration of the kinematic connection, i.e., bringing the limiter back to its original position, is carried out without the expense of manual labor and the use of additional mechanisms.  Invention Formula A crane load limiter containing suspension means for a lifting mechanism, two-arm arms hinged on it, one of the arms of which are connected by elastic elements, and a hook mounted for reciprocating relative to the suspension means, made with a curvilinear working surface. 1604723 56 characterized in that, in order to increase the symmetry of the suspension means with figured extrusion, it is equipped with an offensive set at the second end for the interaction of the suspension means with the axles and at the extreme curvilinear working surface of the measuring glass with one pair of grips , one ends of which are installed with the possibility of inter-5 of them fixed on the suspension means, act outside with free others - on the hook from the side with the last arm of the two shoulders, and made by the sun, while hooking ene tailing with a through longitudinal slot on one trailer in the form of rods, and means podves- for accommodating therein the free odnoyki - with a through longitudinal groove for one of said axes and directed to osirazmescheni rod.