Resistance type crane safety device capable of preventing aslant pulling and hanging

Abstract

The invention discloses a resistance type crane safety device capable of preventing aslant pulling and hanging. The safety device comprises a guiding rod, a fixing rod and a horizontally arranged sliding rod. A long hole is formed in the middle of the sliding rod in the length direction of the sliding rod, and the bottom end of the guiding rod is connected into the long hole in a sliding mode; a sliding hole is formed in one end of the sliding rod, and the other end of the sliding rod is fixedly connected with a resistance changing disc; a connection wire is connected to the center of an inner resistance disc; the bottom of the fixing rod is bent and then stretches to the position below the inner resistance disc, the bottom end of the fixing rod is bent upwards and then is provided with a big-end-down conical portion, a sliding contact is formed at the tip end of the conical portion, and the resistance changing disc is supported by the sliding contact in a sliding mode. When a hanging hook or other lifting appliances are located at normal hoisting positions, the center of the resistance changing disc makes contact with the sliding contact. The resistance type crane safety device is simple in structure and convenient to manufacture, mount and use; the safety device additionally mounted on an existing lifting device can prevent the aslant pulling and hanging phenomenon, and safe operation of a crane is guaranteed.

Description

technical field [0001] The invention relates to the technical field of cranes, in particular to the anti-skewing and inclined-hanging technology of cranes. Background technique [0002] In most existing cranes, there is a relatively static end of the hoisting wire rope, which does not move with the rotation of the drum or pulley, and is called the static end; for example, one end of the hoisting wire rope of many cranes is fixedly connected to the hoisting mechanism. The hoisting mechanism at this place is relatively static, and the other end of the hoisting wire rope goes around the movable pulley downwards and then turns back upwards to connect the reel or passes through the movable pulley block and the fixed pulley (group) to connect the reel. In the existing few cranes, there is no fixed end of the hoisting wire rope, and the present invention does not relate to this type of crane. The hoisting wire rope of the crane is connected with a hook or other types of spreaders ...

AI Technical Summary

Problems solved by technology

[0005] 1. Crooked pulling and inclined lifting will increase the load of the crane, which may cause serious overload of the mechanism and motor, reduce the service life of the crane, and even cause structural damage to the crane

[0006] 2. Crooked pulling and hanging will increase the wear of the wire rope, reel and pulley, and may damage the rope arrangement

[0007] 3. Crooked pulling and hanging may cause the wire rope to come out of the rope groove of the drum and be wound on the drum in multiple layers, and may also cause the wire rope to come out of the pulley groove, causing the wire rope to fall off the road.

[0008] 4. Slanted lifting will cause the load to generate lateral component force. Once the load is off the ground and loses the constraint of ground friction, it will swing along the direction of the horizontal component force, which may hit people or objects and cause accidents.

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