DE1634932A1 - Multi-stage excavator grab - Google Patents

Description

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Έώχ this application takes priority from the Italian patent application Mr. 256 93/64 of 50 November 1964 taken in Ajisprucli

Luigi PEDROII

Danilo BRAGASTINI Milan (Italy)

"Multi-stage excavator grab."

The present invention "relates to an excavator grab with gripping shells for carrying out excavations
vertical boundary walls · In particular, the invention relates to a bagg, which is intended for the aforementioned Veswenfiungs-Z7, which is also used in the case of sotoeakM ^ ssa ₉ in
aafererea working steps © »Greifsohalsn, in order to capture @ia b © äeut & r ₃ a increased work area usö © iiie swtolsmissig © Including the working position of the Sohalea to ssgielen«

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. used excavator grabs are known to have parallel to the longitudinal extent in relation to the working movement of the gripper of the excavation a work area which is approximately to the maximum width achievable from the sum of the dimensions of the gripping shells ^ if these Shells are in their outermost pivoted position, is limited. The implementation of excavation work with vertical boundary walls goes in practice Use of excavator grabs designed in this way rather slowly, because the formation of the usual the excavation necessary for laying the individual longitudinal sections of the wall construction in successive excavation cuts must be made, e.g. by digging a first section, the excavator grab to excavate a second excavation section located next to the first is adjusted to the soil zone swisilien the two at a distance from each other and 'Remove the previously excavated sections as follows.

A large part of the ex- gotit digging grapples ^ Konstruk '^ e. ^r j " * · ' ~~ ^r <' ""^ r» * * "· - tr f '-υο _{ ίγ at j- * ^ ₁ - ¹ ^ rl'"'- ⁿ ■>' · ' ' - ^ίΜ : * '.6 5äe' istiib

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simple sum of the dimensions of the grab shells alone, when these are in their maximum open position, can be reached.

Another object of the invention is to provide an excavator grab of the aforementioned type in which the grab shells in relation to the ground depending on the most favorable angle of penetration into the ground, regardless of their working pivot position, set v / ground.

Finally, another object of the invention is to provide an excavator grab of the type mentioned above Type to be created, which is particularly simple and easy to construct for the realization of the tasks mentioned above can be operated, in which the width can be changed across the excavation, in which without further change the main structure of the grapple is only the gripping trays must be replaced, which works reliably, practically usable and in its creation is relatively cheap.

These and other objects of the invention are achieved with the excavator grapple which is the subject of the invention achieved, which is characterized in that between "the gripping trays" and the support body. · Swivel arms ".. 'are provided, which are ängelenken with one end on the support body and with the other end are articulated to the gripping shells, wherein independently operated drives for swiveling cLer Swivel arms and the gripping trays are provided.

Further I er features and advantages of the invention are clearer from the following description of a preferred, but not an exclusive embodiment of the multi-stage excavator grab according to the invention

009830/0760

. Refer to which is shown, for example and without limitation, in the accompanying drawing is in the

Fig. 1 shows the gripper according to the invention schematically

seen from one side shows and the

Fig. 2 to 8 representations on a smaller scale

of the same gripper in some schematic positions where the work phases are.

According to the drawing and in particular FIG. 1, the multi-stage gripper according to the present invention essentially consists of a carrying or supporting body 1 'ion in the wessiitliofaei] flattened structure, from swei syiaae te isolier: l ^ aiteile 2 and 3, which are attached to the body 1 "bsi 4 hz ~~ u 5 are distracted _; as well as from two opposite- ^" 3 @ i ^: lisg3iiä3>: G ^ sifsohal®! * 6 and I ₃ those at 8 bsw. 9 ■ ', :: · tie syaas-iirisofcÄD Axi-r'jsile 2 vmä 3 are distracted _s

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of the flattened elements 1, 2 and 3 are hinged. The top of the triangular parts 2 and 3> runs in such a way that it corresponds to the relevant half course of the underside or base of the trapezoidal Body 1 is complementary, so that the triangular parts, as explained in more detail later will be in the position of their maximum approximation in relation to the mentioned symmetry. The gripping shells 6 and 7 are at the lower apex the triangular, symmetrical arms 2 and 3 formed parts articulated with bolts 8 and 9, the axes of which are symmetrical and parallel to the axes the bolts 4 and 5> with which the triangular Parts 2 and 3 are hinged to the body 1, are .. On the support body 1 is with bolts 10 and 11 in a symmetrical position each a linden of fluid dynamic cylinders 12 and 13 articulated, their Piston rods 14 and 15 with their free end

Bolts 16 and 17 are hinged to the other vertex of the symmetrical arm parts 2 and 3.

In the area of the pivot pin 16 and 17 is further each one end of another corresponding fluid dynamic cylinder 18 and 19 articulated, the piston rods of which 20 and 21 with their free end with bolts 22, 23 on corresponding parts of the Grelf shells 6 and 7 are hinged. The mentioned pairs of pivot bolts 10, 11 - 16, 17 and 22, 23 lie with their axes parallel to the Aoh «« of the above mentioned © «AiiXenkbolgsenpaare, 4, 5 u, 8.3.

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machine maneuvered ", provided that the The mentioned machine is suitable for the rapid raising and lowering of loads, is, like scaffolding systems, truck cranes, Excavator with crane arms, for which in the drawing, for example, a non-rotating pulley suspension with double maneuvering game 24-25 and corresponding rope 26 is shown.

The actual excavation work (pivoting and moving the trays 6 and 7) is carried out depending on the type of the system used either from a separate flow pressure center using high-pressure hose lines 27 and 28, in the well-known Yfeise on the separate control center and connected to cylinders 12 and 13 and 18 and 19, or from a control center of the type mentioned above, but in the excavator itself as indicated by the reference numerals 31 and 32 in FIG Way is accommodated and electrically remote-controlled.

A few phases of work that are related to the one described above multi-stage excavator grabs are in the pig. 2-8 shown. the Pig-. 2 shows the case in which the device is in the Auehub with open shells 6 and 7 and with a maximum opened swivel structure 2 and 3 is lowered; In this case the cutting edges of the shells penetrate 6 and 7 vertically into the ground. In general Actuation that controls the shells 6 and 7 steering oil pressure cylinders 18 & 19 becomes a shell's first threat

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causes / aaa a the desired Sindring angle alpha is reached, which can be forwarded depending on the floor door (Fig. 3). When keeping BCäibo there *

lateral position between / the shells 6 Uo 7 and the V er swivel structure 3 and 2 ie, with unchanged position of the penetration angle alpha, "when the oil pressure cylinder 12-13 controlling the secondary swivel structure 2-3 was actuated, the entire ürdabhub was carried out, which on Versehwenkweger.de, if necessary, by ending the complete leasing of the shells β uo 7 (Fig. 4). The figure 5 shows that the Ggi <1: with closed shells to the surface .: ^-: _p whereas from Figo 6 is apparent that 5 xreEÄ: Bios Tiut the Schaler; 6 u Ϊ controlling cylinder 13 υ "19" b etätigt, the shells check open, and the sharks: lsi on collection - u transport. ? gases (funnel _s Laetautos etc. ₀ ) discharged v / irdo Ide Figo 8 in show v / io the device according to the invention can be used

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a) excavation with minimal shell opening; the bowls act on the ground only through rotation.

b) Excavation with shells opened beyond the minimum? the shells act on the ground first by turning them for the better angle of penetration and then with them a shearing movement "

e) Excavation with the shells opened beyond the minimum in the presence of natural or artificial hoists? The bowls can only be placed on the floor by turning to isolate the obstacle and then by moving away to remove the Excavated material act =

d) Excavation with the shells opened beyond the minimum? Bodeögradiguügf The bowls can first be in the form of a. Albsölier movement and sodanis i'ü Perm a rotary movement to capture the materials that have fallen off during straightening

The above 'mentioned' embodiment was given lecliglioli as an example . ~ Aä it is therefore

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Claims (1)

Γ AIE Έ T AJ SPE ίί G HS. -, -'- ■■ "_-: nVl Excavator does he grab especially for deep excavations with a support body for the grab shells _? characterized in that between the Grelf shells (7? 8) and the '. Carrying body (1) swivel arms (2,3) are provided ^: one end of which is hinged to the carrying body (1) and the other end is articulated to the handle shells (7,8), whereby independently actuatable drives ( 12,13, 18,19) for pivoting the swivel arms - ) (2,3) and the gripping trays (7,8) are provided. s 2. Excavator grab according to claim 1, characterized in that "j that remote-controlled control centers 1 (31,32) for the drives ("? 2,: 13 and 18, 19) 5 are arranged. : 3. Excavator he grabs according to claim 1, 2, dadur oh; characterized, -1 that the drives (12 _? 13 and 16-, 19) are in the pressure, Ί each with one end at one of the relevant \ relatively movable part (1,2,3 * 6/7) of the i excavator grab are articulated and with the opposite -. . ; set * end of the respective piston rod to the neighboring » I relative movable relevant part 4 «Excavator grapples naolj den Ansp ^ uehen 1 ynd 2 _? thereby ■■:. j marked j ~ dasa- & Le Schweölcarffle i Siki I have vtnä ite Inlettköögspänkta in . ^; rder .. of the parting · . form in supervision ». 6. He grabs excavator according to claims 1 to 5, thereby • marked - that the supporting body (1) is box-like is formed and the auxiliary devices (12, 13, 31, 32) contains.