SU990634A1 - Vibrated grapple - Google Patents

Description

The invention relates to lifting equipment, in particular to vibratory grabs.

A vibrating grab containing jaws connected to the crosshead, a closing mechanism and vibrators, including electric motors, are known; an eccentric 1 is placed on the shaft of each KOTOiMix.

The disadvantage of the known vibrating grab is the energy consumption, since the vibration in this grab is also directed only along the jaw closing path. In addition, the vibration from the excitation source due to the rigid construction is transmitted to the entire mass of the grapple, which also causes unnecessary energy consumption and significantly affects the design of the grapple itself.

The purpose of the invention is to reduce energy consumption by reducing frictional forces when scooping.

This goal is achieved by the fact that on each shaft of the electric motor an additional eccentric is placed at a right angle to the main shaft, a keen joint mathematically with the main one by means of elastic connecting rods with the jaw of the grapple.

FIG. 1 shows a vibration grab, a general view of FIG. 2 is a view A of FIG. one; in fig. 3 shows a section BB in FIG. 2

The vibrating grab contains two jaws 1, made in the form of separate semi-cylindrical combs. On each jaw 1 fixed two elastic connecting rod 2, which are connected movably,

10 for example, through rolling bearings with eccentrics 3. The eccentrics 3 are made integral with the shaft 4 and are located at an angle npHfejM to each other. The shaft 4 is connected by means of slots 5 with

15 by an electric motor 6 and is mounted in a support 7, which is pivotally connected to another support. The hinge mechanism 9 is attached to the hinge axis 8. To the supports 7 are attached pivotally

20 10, which are attached to the upper end of the traverse 11. The jaw closing mechanism is attached to it.

Vibration works as follows.

25

It is lowered onto the material with open jaws 1. When in contact with the material, an electric motor 6 is turned on, which rotates the shaft 4. Shaft 4 converts rotational movement

30, through the eccentrics 3 and the elastic rods 2 into an elliptical one movably connected to them, which is transmitted to the jaw 1. The jaws 1 form a gap in the zone of contact with the material along the entire jaw surface due to vibrations in two directions. When inserted, the jaw closure mechanism 9 is simultaneously turned on, which, pushing support 7, reduces jaw 1 to close completely. Vibrator grab is lifted out of the yoke 11 for transporting it with the scooped material to the place of discharge.

The use of a vibrating grab, in which the vibration is carried out by two eccentrics located on the rotating shaft at a right angle to each other, makes it possible to reduce the gain on the closing of the jaws when immersed and hay straw straw materials by about 66%. The use of elastic connecting rods mounted on the jaw and connected movably with the eccentrics allows reducing the harmful effect of vibration on the design of the grapple.

Claims (1)

1. Becker I.G. Cranes and grapples in the timber and woodworking industry. M., 1978, p. 98, fig. 476 (prototype). Type A