DE1756642C3 - Gripper in composite construction - Google Patents

Description

Metal parts are glued on

7 IGreifer Sch ei ^ m or more of the claims 1 to 6, characterized in that the metal parts on both sides of the gripper shells (2) are surfaces are arranged.

8. Gripper according to claim 7, characterized in that the metal parts by connection * - elements such as screws or rivets are connected to one another
verounaen sina.

The invention relates to a gripper in composite construction, in which the gripper shells from one material other than the force application surfaces and the cutting edges.

There are already known grippers in which the gripper shells are made of aluminum and the cutting edges and other frame parts are made of steel. This composite construction has compared to the general common steel grabs have the advantage of a lower dead weight. Unfortunately, such grippers are because of very expensive due to the high price of aluminum; therefore they were not produced in large quantities. When processing aluminum there is the additional disadvantage that it is all complicated Individual shell parts cannot be burned out with a copy-burning device, individually torn and then cut out with complicated sawing or cutting devices Need to become. The welding or riveting of these individual parts also makes a particularly high level Amount of work required.

Since aluminum has a tendency to wear heavily on many loads, it is often necessary that all of them with surfaces that come into contact with the load are reinforced with wear-resistant steel.

Are also known bucket wheel, in which scraper bucket surfaces of a plastically veriein 3UIiUi _teria j _Connections hH _e SEN at the stählernden cutting edges of the fine sight. These deform

Sfunto the load of the permit good and relax - prevents ii h ^ m Fntleeren This flexing extending the ^Ln "^ ^c _'DG j _e abrasions bucket caking ^KieD PS * \ _{obd the} volume by only ^ n' men belass u ^ ^ ^ _BeIastuQg

the ^De ™ * ^ren . , YY _n . _{In doing so} , mining from the outside would not be a _disadvantage

mer. ² ^ ^m Äkonstruktion steel-plastic verfend ^v "*" ^ ⁰ "^ ™ Legending PLASTIC or rubber moldable material _di ^ _rough

no use required,

or the like. bump and

according to one or more of claims 1 to 3, characterized in that the gain of the gripper shells (2) by crimping ^e 5 Gripper according to one or more of claims 1 to 4, characterized in that the ^ erschalen (2) with an abrasion-resistant layer should be a lighter, ^.

^^ wki Jon * solved that the gripper shells from * «* ^ * ^ and the force introduction surfaces and cutting edges from Me« worshiped. ^ ^ ^^ _{that the crdfcr} _ scha.en tear down because the metal: the funcuon of a reinforced art ° «^ £ '

mations to the individual

so has a ^^
that with large T
different p

substances no harmful ^^^ occur. This also applies to the. Case that

works under water and the Kunstetoff durchι seme Moisture absorption! »" ^ EAjtoplj · Structure with separately arranged metal parts still leave a separate gripper shell manufacturing unit according to a shape and allows the attachment of the metal parts without much adjustment work.

This gripper has the advantage of a low ^Εί 8 ^βη 8 ^ ¹ "-J '" crane, excavator or the like ^ ^ ™ "^ ™ _Ογ ^""thus transporting a higher payload in a larger gripper The gripper shells are all-wear-resistant and, in connection with rust-proof metal parts, also corrosion-resistant.

According to a further embodiment of the invention, the reinforcement of the gripper shells consists of in Glass fibers embedded in the plastic and / or it is formed by beads. The wear and tear exposed surfaces of the grab shells are with provided with a particularly abrasion-resistant layer. Edge zones of the gripper shells stressed by tension are provided with corresponding reinforcement beads during molding.

The metal parts are after a training

6c of the invention on both sides of the gripper shells glued on and additionally by screw or rivet connections connected with each other. The adhesive has the property of not shrinking. When Screws are suitable with hexagon socket screws, the heads of which are embedded in the metal parts.

The gripper shell is manufactured according to a model that has the inner shape of the shell. After the model inner surfaces with a

<f

Release agents are treated, it is »specially achieved that small -

wear-resistant fillers (carbides) the different nere forces are required, whereby smaller OT-

Plastic layers added the, - * layers, best times and a further reduction in the

using plastic-soaked glass mats and the gripper's own weight.

Glass fabrics are alternately laid on until 5 five examples of the weave are in

the shell wall thickness has been reached and thus the drawings shown and in more detail below

Model interiors are filled. Depending on the explained. It shows

waited wear of the individual shell surfaces F i g. 1 a pair of shells from a loading spreader

are these more or less strong with especially F i g. 2 a pair of shells of a Muli gripper, whose

abrasion-resistant plastic coated The plastic io teeth attached to the cutting edges sina,

can still be enriched with additives. F i g. 3 a pair of shells from a Tnmmgreiier,

which have an anti-inflammatory effect. In Fig. 4 the loading grapple according to h ig.I complete

required large wall thickness, the glass with gripper carrier, drive unit and actuation

mat and glass fabric layers in the area of the cylinders,

heavily stressed outer fibers placed, while x ₅ Fig.5 the trimming gripper according to F'g · - »completely

in the area of the neutral fiber only a plastic filler with rope pulleys, head, opening pulley block and

is embedded medium. Push rods. .

The fastening of the cutting edges, the U-shaped. The left half of all grippers is in the approach

is pushed over the gripper shell wall until you see and the right one is drawn in cross-section. at

if it lies snugly on the front surface, the cutting edges 1 are made by means of the sectional drawings

an adhesive that strongly pulled out all the joints of the individual and the gripper shells 2 scnral-

Fills the dividing surfaces completely and feels at home. .

hardening does not contract During hardening With the gripper according to Fig.

of the adhesive are the free ends of the U-shaped edge 1 from a U-shaped piece; this muck

The cutting edge is firmly attached to the gripper by means of screws - 25 also serves to take up the trench

shell wall pressed so that a form-fitting point bolt 5, while the Kratleinleitungs-

Connection punctiform acting forces on surface 4 to accommodate the actuation cylinder bolt

a large supporting width is again arranged separately from the cutting edge 6.

edge can be transferred into the gripper shell. At the garbage gripper according to FIG. 2 are teeth: 3 with

The cutting edge consists of a highly welded cutting edge 1. The cutting edge

wear-resistant steel profile tip, the slightly back 1 are on the side of the open garbage can shape

set at the top and bottom less wear-resistant flat U-shaped drawn up. The force introduction pools 4

iron are welded so that a nüch rear of-> ur receiving the shell pivot pin 5 and fenes U is created that with some leeway for the. the actuating cylinder attachment bolts are separate

Glue pushed over the gripper shell wall 35 attached to the gripper shells 2,

can be. The gripper shells 2 of the trimming gripper for the pivot pin mount

serving force application surfaces can already as F1 g. 3 are each with three force introduction surfaces 4

Single part can be drilled, with which, apart from seeing, the topmost the shell pivot point bolt

simplified transport, advantages during production, which is also used to store the upper pulley

in the use of the existing machine park 40 block head is used, and the opening pressure

develop. gene articulation bolt 7 receives. The Schheß-Seil-

In the case of trimming grippers. the low shell weight roller bolts 8 are supported by the overlapping

still has the advantage that the center of gravity of each of the force application surfaces 4 and the U-shaped

The gripper half is close to the gripper ridges. Cutting edges 1 formed here were added.

1 sheet of drawings

Claims (2)

Patent claims: 1. Gripper in composite construction in which the gripper shells are made of a different material exist as the force introduction surfaces and the cutting edges, marked thereby e t that the gripper shells (2) made of reinforced plastic and the force application surfaces (4) and the cutting edges (1) are made of metal. 2. Gripper according to claim 1, characterized in that the force introduction surfaces (4) as separate ^ elements on the gripper shells (2) ^feS 3! ⁸ Greitr according to claim I _1, characterized in that the reinforcement of the gripper shells (2) made of glass fiber embedded in the plastic