SU998294A1 - Tongs of well crane - Google Patents

Description

(54) CRANE TILE

one

The invention relates to a lifting and transport equipment, and advantageously can be used in the clamping mechanisms of lifting devices.

Known taps of a crane, containing a vertically connected to the drive shaft, located inside the cartridge, on which the castors are hinged, the upper arms of which have fingers, a case coaxially positioned relative to the pole, and has a shock absorber, which includes At least two springs mounted in cups on thrust bearing elements. The disadvantage of known ticks is the intensity of the metal structure.

The purpose of the invention is to reduce the metal content.

This goal is achieved by the fact that a horizontal partition with a hole for a rod is fixed inside the chucks of a wellhead tap inside the cartridge, above and under which the shock absorber springs are coaxially mounted, while the lower end of the rod is provided

adjustable height stops for the glasses of the shock absorber.

FIG. 1 shows a pincer of a crane, general view; in fig. 2 - unit of fastening the shock absorber to the cartridge.

The end-of-line crane pliers consist of a block 1 mounted in a holder 2, which with the aid of a crossbar 3 is attached to the shank 4. The latter passes through a hollow shaft 5, on which the housing 6 is fitted with inclined grooves 7, which are

10 fingers 8 with castors 8 rollers fixed on them. The cartridge 10 is fastened to the shtange 4 by means of a shock absorber consisting of two springs 11 and 12, mounted in cups 13 and 14, on 15 thrust bearings 15 and 16 on the inner side fixed to chuck, horizontal septum 17.

The lower end of the bar is equipped with height-adjustable stops, which are made in the form of nuts 18 and 19 screwed onto the threaded section of the stem 4 for the glasses 13 and 14 of the shock absorber. The lower part of the shock absorber is protected from damage by the safety cover 20.

The pliers of the crane are as follows.

Closing of ticks occurs when the rope, the envelope block 1, is unwound from the drive drum. In this case, the yoke 2 is connected by means of a bar 4 with a cartridge 10, moves down along with castors 9, the rollers of the fingers 8 of which roll along the inclined grooves 7 of the housing 6, as a result of which the solution of mites decreases.

The inertial loads caused by the masking of castors 9 and natron 10 are perceived by the lower spring 12 of the shock absorber. The process of imposing ticks on the ingot: characterizes the unloading of the lower spring 12 and the loading of the spring 11, the elastic properties of which help to reduce the dynamic loads on the shank 4 and associated with her clip 2 with the block 1. In addition, the unloading of the spring 12 causes axial movement of the rod 4 down that provides the normalized slack of the drive cable, necessary for normal operation of the tick-borne mechanism.

When moving the casing 6 upwards by the lifting mechanism, the rollers (fingers) 8 under the action of the mass of the ingot move in the grooves 7, as a result of which the final ingot clamping takes place, and the cartridge 10 lowers, compressing the spring 12, which prevents excessive tension of the rope drive.

The ticks open when the block 1 is moved upwards, the clips 2, the shanks 4 and the cartridge 10 together with castors 9, the upper ends of which with the rollers of the fingers 8 come closer and the lower ones with cores disperse, freeing the ingot. In this case, the dynamic loads caused by the slack of the drive cable are damped by the spring 12.

When the ticks 4 rotate, owing to the support pliers 15 and 16, the ticks remain motionless.

The proposed design of ticks of a well crane is less metal-intensive than the known one.

Claims (1)

Invention Formula A pit crane pliers, containing a vertically connected drive shaft, placed inside a cartridge, on which hinged castors are fixed, on the upper arms of which are mounted fingers, a case with inclined slots located relative to the stem, and a shock absorber, including at least at least two springs mounted in cups on thrust bearing parts, characterized in that, in order to reduce metal consumption, a horizontal partition is fixed inside the patron. A hole with a shtangi hole, above and below which the shock absorber springs are coaxially mounted, while the lower end of the shtangi is equipped with height-adjustable stops for the shock absorber cups. Sources of information taken into account during the examination 1. Patent of Germany No. 958594, cl. 35 V 6/03, 1957.