DE412404C - Rotary shovel excavator - Google Patents

Description

GERMAN EMPIRE

ISSUED ON APRIL 18, 1925

REICH PATENT OFFICE

PATENT LETTERING

- JVl 412404 - CLASS 84 d GROUP

■ V \ 84d)

Dudley James Barnard in Barking, Essex, Great Britain

Rotary shovel excavator. Patented in the German Empire on March 12, 1920.

The subject of the invention is a rotary shovel excavator in which the lifting chains at the same time cause the rotating blades to close.

The essence of the invention consists in a device to the shovel hook for proper and safe engagement of the pin contracting the vanes bring to. For this purpose, the bottom block, which can move against said pin, with the pin bearing crosspiece connected by Nuremberg scissors, which are connected by sliding pieces in Guides get such a degree guide that the latching of the hook in the pin must always occur with certainty, regardless of the position of the excavator. In order to achieve the automatic action of the excavator, a resilient device is also provided, which When lowering the bottom block, place the weight-bearing hook into the latching points transferred, but turns itself off after coupling the pin with respect to the engagement in the hook.

The aforementioned facilities can be seen on the basis of those shown in the drawing Explain exemplary embodiments. In the drawings:

Fig. Ι a side view of the excavator with the grab bucket closed,

Fig. 2 shows a corresponding view with the blades open,

Fig. 3 is an enlarged view of the

Locking and releasing device for the hook and

Fig. 4 is a side view of Fig. Ι. The rotary shovel excavator consists of the two blades ι and 2, which are connected to a lower crossbeam 5 by hinge points 3 and 4 and to an upper crossbeam 6 by the hinge rod 7. The upper transverse beam 6 also carries the over- j bottle g _Xl which contains the corresponding rope pulleys 8, 9. _{The lower block 1O x} hangs on this upper block through a set of rollers 10 through the cable pull 30 < . A brake cylinder 34 is provided between the upper crosspiece 6 and the show, fine i, 2. ; Further, and the lower cross beam 5 is provided between the bottom block _x io a Nuremberg scissors 13 is arranged, the lower hinge members 15 j at the transom 5 and the upper j articulated members are mounted on the lower block on the pin 11 fourteenth The pin 11 also forms the bearing for the coupling hook 17, which is brought into the open position according to Fig. 2 by a weight 19, the hook 17 against a stop 29!

on the bottom block. An arm 18, which is gripped under by a roller 22 of a bracket 21, is also rigidly connected to the hook. The bracket 21 is mounted in the upper cross piece at 2I _x (Fig. 3) and is provided with a bend 28 which cooperates with the hook 27 of a support ring 26 in the manner described below.

A lever 31, one end of which is designed as a roller 32, is also mounted on the crosspiece 5 and rests against the tip of the hook 17 in its latched position and the other end of which is connected to a pull rope 33.

So that the Nuremberg scissors are exactly the same _{when lowering the bottom block io x} ^! moved axially or in a straight line to the pin 20, a guide 12 is provided on the lower cross beam 5, in which the scissors 13 run through a special slide 16, i6 _x . On a guide part 12, vertically projecting guide _{plates 24 a} and 24 ^ are attached, in which a rod 24 provided with a bend at the upper end is inserted displaceably. On the rod 24, a plate 23 is attached at the lower end, which is connected by a helical spring 25 to the upper guide plate 24 _a .

The operation of the device is [the following: If one goes from the clutch; position according to Fig. 1, so when the ring 26 moves with respect to the upper cross piece 6 of the bracket 21 counterclockwise around the pin Zi _x swung out, whereby the hook 17 releases the pin 20. As a result, the shovels 1, 2. To close the shovel, the bottom block 1O _{x is} lowered, and according to the guidance of the Nuremberg scissors 13, the hook 17, which is located by counterweight 19 in the position according to Fig. 2 , comes directly over the Pin 20 to stand. Shortly before the hook reaches this position, the counterweight 19 lies on the plate 23 and thereby brings the hook 17 into the closed position for the pin 20. If _{the bottom block ι O x} is now tightened again against the top block g _x , it hits the end this movement causes the upper bend of the rod 24 against the upper bottle g _x , whereby the plate 23 is pressed downward against the action of the spring 25 and the weight 19 is released. As a result, the hook 17 can execute the oscillation required to trigger the pin 20. An arbitrary uncoupling is possible by the cable 33, in that in this case the roller 32 removes the hook 17 from the pin 20.

Claims (2)

Patent-to sayings: 1. Rotary shovel excavator, in which the lifting chain simultaneously causes the rotary blades to close, characterized in that the shaft (11), which _{is inserted in the bottom block (io x} ), with the crosspiece (5) carrying the blades (1, 2) is connected by means of two Nuremberg scissors (13), which are guided by sliding pieces (i6 _x ) which are movable between vertical guides (12) above the crosspiece (5). i _O o 2. Rotary shovel excavator according to claim 1, characterized in that on the guide (12, 12) of the cross piece (5) a horizontal spring-loaded, under the weight (19) of the coupling hook (17) on the bottom block (1O _x ) engaging plate ( 23) is arranged, which carries a vertically guided rod (24) bent at the top, which is _{pushed back by the crosspiece (6) when the bottom block (io x} ) and crosspiece (5) are raised, so that the plate (23) for the Loosening the coupling hook (17) from the bolt (20) lowers under the weight (19). 1 sheet of drawings.