SU57860A1 - The method of regulating the mechanism of opening mites stripper capture - Google Patents

Description

In existing strip taps, the opening of ticks is limited by fixed stops installed on the tackle control mechanism, large and small. The stops at the moment of opening take upon themselves all the inertia of the moving masses of the mechanism, as a result of which these stops often break.

The present invention aims to eliminate the fixed stops and to use to limit the tick solution by the movement of the upper and lower counterweights, which are an integral part of the mechanism for opening the grippers.

For this purpose, the position of the lower counterweight relative to the upper one is adjusted so that at the moment of full opening of the ticks, the first counterweight rests on the second and thereby stops further opening of the grip.

The inertia of the moving parts is thus perceived by the ropes on which the counterweights are suspended. The elasticity of the ropes absorbs impact, and their strength ensures the mechanism from all accidents. This

The method also has the advantage that the mite solution is not limited to fixed stops and can be easily adjusted according to the dimensions of the molds with which the crane operates.

The application of this method entails only the appropriate adjustment of the relative position of the goods without any structural changes in the mechanisms and can be carried out on any operating strip crane. The removal of existing fixed stops is not necessary here - they can simply be turned off from work.

FIG. 1 depicts a longitudinal section of an overhead crane with a trolley and with a stripper in the plane of symmetry of the latter; FIG. 2 - cross section of the same crane; FIG. 3 - top view of the crane truck; FIG. 4 - section along the shaft of the mechanism for lifting the striper grip; FIG. 5 - ratchet device of the same mechanism; FIG. b and 6a depict in two projections schematically the suspension of the counterweight to the drums of the existing taps at the moment of full opening of the stripping grippers; FIG. 7 and 7a-the same scheme after adjustment for the proposed new method.

The mechanism is controlled in the cabin of the crane operator and carried out by a lever (Fig. 1), coupled by a gas pipe 2 with a crank lever 3-4, which in turn is articulated with lever 5, 7, stuck on a roller mounted in bearings. The lever 5, / is articulated by the rocker 8, 9. The shoulder 9 of the rocker arm is articulated with the switching coupling 27 (Fig. 3) sliding along the shaft 2- /.

The switching mechanism consists (Fig. 4) of a gear wheel 14, a left 12 and a right / 5 ratchet, a switching clutch 27, adjusting bolts 2S and gear 19, which sits freely on the shaft 24. The left ratchet 12 is fixed with a key on the shaft 24, and the right-hand IS on the hub of the gear wheel 19. On the shaft 24, they sit on gear pins 17 and 18, which engage with the gear rims 15 and 16 of the large drums 20 and 21 (Fig. 3), which are assembled on the shaft 26. The gear 19 is in meshed with a gear wheel 11 wedged on the shaft 26. On the same shaft 2o, snare drums 22 and 25 sit on the keys.

The gear wheel 7 is provided with three pawls 29 (Fig. 5), which are under the action of springs 30 in engagement with a ratchet, which lifts the stripper mechanism. The suspension of the striper grip is carried out by means of a lever mechanism 5 / (Fig. 1). The grip hangs on ropes IX fixed on large drums and ropes VIII fixed on snare drums. On the other side of the drums on the ropes X and W / (Fig. 6 and 7) are suspended balances // and /. The upper counterweight / is connected to the snare and the lower // with the big drums. The counterweights balance the strip grip by about 85%.

The adjustment of the existing mechanisms was that with the ticks opened, the lower counterweight // did not reach the upper counterweight / by 50 mm, and the fists 30 (Fig. 6 and 7) of the small drums rested against the ribs 31 of the large drums; in this way, the ribs perceived all the force of inertia of the rotating masses.

The gripping operation is performed as follows.

The lever 1 is turned in the direction indicated by the arrow A. The switching clutch moves towards the gear wheel 14 and removes the ratchet 12 from engagement, as the adjusting bolts 28 (FIG. 4) will press on the tail of the pawls 29. The snore 13 is at this time in engagement with the wheel 14, therefore the shaft 24 and the gears 17 and 75 sitting on it are not able to rotate; the big drums cannot rotate. Stripper grip hangs only on the ropes IX.

The hinge mechanism 5 /, not supported by the V7 // ropes, begins to unfold under the influence of the weight of the gripper; the VIU ropes, which check the snare and raise the counterweight, are carried along. The tongs close at the same time; the failure of the snubs of the snare to the thrust ribs of the snare provides a gripping mold.

To open the grip, turn the lever / against the arrow L; in this case, the ratchet 12 is engaged, and the ratchet 13 is taken out of the engagement; thus, the stopper of the vehicle is snare and the big drums can be turned.

The ropes W // are stretched, and the ropes / X, not retained by the drum, are lowered, rotating the drums and lifting the load up //. The tongs open until the ribs of the big drums are pressed into the fists of the snare.

If the distance between the weights / and // is adjusted in such a way that at the moment of full opening of the ticks, the load // is thrown into the load /, then, regardless of the location of the lugs 31, the further opening of the ticks will stop.

The distance between the weights can be adjusted so that the weights of the weights will occur when the desired solution of ticks, therefore, the magnitude of the solution, is with the existing method of adjusting the value of a constant depending on the location of the stops 81, with the proposed method can be easily changed in accordance with conditions of work capture.

With this adjustment, the ribs of the big drums will not reach the fists of the snare by 5-10 mm and, therefore, will not accept the inertial forces that are absorbed by the upper counterweight, which acts as a buffer for the lower one during the opening of the ticks. Mentioned above, the possibility of adjusting the opening of ticks depending on the dimensions of the mold gives a gain in time.

The subject matter of the invention.

1. The method of controlling the opening mechanism of stripping jaws, characterized in that the ballast weight, suspended on the ropes X of the opening mechanism, is set so that, when it moves up, it carries away the load / suspended to the ropes W / of the same mechanism, weakened thereby the ropes VII, as a result of which the opening of the ticks is stopped.

2. A method for controlling the size of the mite solution of a strip-type gripper opened in accordance with the method set forth in clause 1, characterized in that the initial distance between the weights / and // is set depending on the desired value of the mite solution

Shig1

gh: :: y: yyu - -: - - yj f /// (fjff /

Fig.O

ShIG.Ba

Shig7

7y