DE1913236A1 - Device for shovels for loading machines - Google Patents

Description

The invention relates to a device in shovels for loading machines, in particular Loader of the type in which the shovel is pivotably mounted at the outer ends of lifting arms, which in turn can be pivoted within the framework of the loading machine are stored and pivotable by means of a lifting cylinder ', at the same time as pivoting the shovel at least one tilt cylinder is provided opposite the lifting arm is"

Leveling work places © in an important work area for Verlademasshinen d@r. mentioned type. The Shovel is usually with a flat chest

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POSTSCHECK 1 HAMBURG 147iO7 - BANKi COMMERZBANK A. G., HAMBURG, DEP.-KASSE 20/12829 TELfGK.i SPECHTZiES HAMBURO, biw. Sf ECHTZIES MDNCI

so that is suitable for both coarse and fine Work is used. At. Planing work will be the Machine moved forward, leaving traces behind.

The shovel is often provided with teeth in order to be able to carry out rough work. The fine grading can then be carried out by moving the machine backwards with the bottom of the shovel to compensate for the Brdmassen against the earth. Bin degree of finish work by means of the bottom of the blade traces from the forward driving can also be executed in cases where the blade is provided with a flat chest cutting, whereby the actual leveling work is carried out when driving forwards and the fine grading serves by means of the Schaufeibodens substantially to eliminate.

The present invention is based on the insight that a scoop device of the above Kind is not sufficiently effective, and the invention is based on this disadvantage to eliminate.

The invention 1 / 6sung consists primarily in the fact that the or each Eippzylinder ± m are arranged substantially parallel to the lifting arms and, together with the Hebearraen trad at the ends of the tilt cylinder and the lift arms setaf®ni £ © foar a33g®sahl ss © m © si

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Tilting arms or guide links form a parallelogram linkage, which in one corner (via a second Guide member) with the vehicle frame and in the diagonally opposite corner via a tilting member It is connected to the shovel, the elements of the parallelogravic rod being arranged and dimensioned in this way are and the tilt cylinder have such a stroke that the shovel from a loading position with the Upper edge is generally adjustable in the horizontal plane in a Feinauehublage, wherein the rear edge of the shovel can be placed against the ground.

The invention is described in more detail below with reference to the drawing.

Fig. 1 shows a side view of a crawler loader selected as an embodiment with the Sehaufei in excavation position Qrobplanierungι

Z is a similar side view, with the full lines showing the lift arm at the greatest lift arm height and the bucket in the dump position (greatest dump angle at the greatest lift arm height), while the dashed lines show the greatest backward tilt of the bucket at the greatest lift arm height;

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3 shows in full lines the blade in FIG

a fine leveling position and with dashed lines in an excavation position}

Fig. 4 is a partially sectioned partial

sees a dumping or leveling stop

The drawings show a conventional crawler loader 10, each with a lifting cylinder 11 and

a tilt cylinder 12 on both sides of the drive motor 13 of the crawler loader. The lifting cylinders 11 operate a lifting arm i4, which is attached to the frame 15 of the The vehicle is articulated and at its outermost end the pivotably mounted on the shovel pin 16 Bucket 17 carries.

Each tilt cylinder 12 is arranged approximately parallel to the lifting arm 14, with the main end of the cylinder is articulated at one end of a rocker arm 18, while the end of the piston rod with one end of a first Guide member 19 is articulated. The rocker arm 18, which has the shape of a double-armed lever, is connected at its other end to a second guide member 20 which is attached to the vehicle frame 15 is articulated, and also the rocker arm 18 is articulated between its ends with the lifting arm 14. The other end of the first guide member 19

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is hinged to the lifting arm 14 and the first find that is connected to the piston rod end of the tilt cylinder is also with one end of a tilt link 21, which in turn is articulated to the shovel 17 by means of an upper shovel pin 22.

¥ ie already mentioned, Fig. 2 shows with dashed lines the bucket in a raised backward tilt position, The top edge of the shovel should be as horizontal as possible. The greatest backward tilt at the maximum lifting arm height, i.e. the angle oC between the underside of the cutting edges 23 and the horizontal plane, is expediently about 60. In the embodiment shown, the dimensioning is such, that the angle OC increases somewhat with increasing lifting arm height up to the mentioned value of about 6O, what as is considered completely sufficient to be able to keep the shovel well filled in the loading position.

As already mentioned, FIG. 2 shows with full lines the position of the shovel 17 when it is emptied. Of the largest emptying tilt angle / 3, which is measured from the horizontal plane to the inside of the bucket at maximum lifting arm height in the arrangement shown about 68, and the device according to the invention differs in this respect favorably

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of known devices where the largest emptying tilt angle usually 'about ^ 5 °. One of the advantages is that the attachment or distribution of the excavation can be varied better than before.

With the tilting arrangement proposed according to the invention, the shovel 17 can be pivoted by about 170 so that its rear wall edge, which is expediently provided with a leveling blade 2k , is placed against the ground, as shown in FIG. The arrangement shown enables rough grading with a serrated shovel to be carried out when traveling forward (FIG. 1) and then fine grading with the cutting edge 2k when reversing, as shown in solid lines in FIG. The rear wall of the shovel conveys the material very well and the finely leveled surface shows no traces of the vehicle's caterpillars.

Another working moment, which is due to the large range of rotation with the shovel device the invention can be carried out is shown in Fig. 3 with dashed lines. The shovel is used to level a vertical wall using teeth 23 », e.g. when excavating a foundation.

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Due to the large range of movement of the blade made possible by the invention, it has been found to be very important to provide a stop which prevents excessive movements which could otherwise lead to damage to the piston rods of the actuating cylinders etc. For this purpose the lifting arm is 14. provided on its underside with a generally designated 25 stop. This stop is rotatable about a pin 26, for example by means of a bar which is inserted into the bore 27 and held in the set position by means of a spring-controlled ball lock 28 or the like. The stop 25 has two oppositely directed surfaces 29t 30 with different inclinations with respect to the underside of the lifting arm Ik to limit the pivoting angle of the shovel 17 ", namely to a smaller angle when the shovel is used for normal rough and excavation work, and a larger angle when the shovel is also to be used for leveling work and dumping of excavated material with high tacking force (full lines in Fig. 2). The adjustment of the stop 25 takes place, of course, before the work in question is started.

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Claims (3)

ι a ι PATENT CLAIMS 1. J device for shovels for loading machines, in particular truck loaders of the type in which the shovel are pivotably mounted at the outer ends of lifting arms, 'which in turn are pivotably mounted in the context of the loading machine and pivotable by means of a lifting cylinder, with the simultaneous pivoting of the Shovel opposite the lifting arm at least one tilting cylinder is provided, characterized in that the tilting cylinder or cylinders (12) are arranged essentially parallel to the lifting arms (i4) and together with the lifting arms (i4) and at the ends of the tilting cylinders and the lifting arms (i4) pivotably angje ^ · closed tilting arms or guide members (18, 19) form a parallelogram linkage, which in one corner (via a second guide member 2O) with the vehicle frame and in the diagonally opposite corner via a tilting member (21) the shovel (17) is connected, the elements of the parallelogram linkage being arranged and dimensioned in such a way and di e Tilt cylinders (12) have such a stroke length that the shovel can be adjusted from a loading division with the upper edge essentially in the horizontal plane into a fine lifting position, whereby the rear edge of the shovel can be placed against the ground * - 9 - 90 98 86/0 943 ORtGINALlNSPECTED 2. Device according to. Claim 1, characterized in that the elements of the parallelogram linkage are arranged and dimensioned in such a way that the shovel from its approximately horizontal loading position to
can be pivoted about 170 into the fine leveling position, 3. Apparatus according to claim 1 or 2, characterized in that a straight leveling blade (24) is provided along the edge of the entire rear wall of the scoop. k " Device according to one of claims 1 -3» characterized in that a stop (25) which can be set in two different limiting positions
to limit the swivel angle of the bucket (.17)
is provided on the lifting arms (i4). 909886/0 943