DE1924669A1 - Support structure for an excavator - Google Patents

Description

Ernst Menzi AG, in
Widnau (Switzerland)

Support structure
for an excavator

The invention relates to a support structure for an excavator, the substructure of which has a non-powered pair of wheels on at least one side and on the other side has height-adjustable footrests.

Such excavators are known as small excavators. You move progresses step by step by means of its own boom

. 009851/1220
HE 1948 9 / mü / 34

and are often used to make trenches or to excavate existing trenches. Ba excavators of this type are very agile, are their possible uses practically no limits, so that they can be used both in swamp and moor areas, as well as in the steepest terrain, for example in avalanche barriers. The invention is therefore based on the object .the.Bag-- ^ ger to be trained in such a way that it spans itself widely by means of its supporting structure (support structure) Can bridge trenches, which according to the invention thereby succeeds in that the strife of the pair of wheels on a horizontal beam are mounted and a downwardly directed leg is provided between the horizontal beam and each had and the length of the downward leg is greater than the wheel diameter, creating a U-shaped a trained framework is created.

It is true that crane systems are known which, inter alia. have a U-shaped and portal-like frame with wheels, but such systems are tied to rails, i.e. to fixed, stationary paths, such as in Power plants or port facilities. These crane systems are neither in terms of their structure nor in terms of their

909851/1228

Operation to be regarded as equivalent to the subject matter of the invention.

To illustrate the invention, this is done without to restrict the invention on the basis of an exemplary embodiment described. Show it? Fig. 1 shows the excavator from the front in Betriebssteliurtgi Pig. 2 the excavator from the Side in section along the line Π-ΙΙ in Fig. 1, j Fig. 3 The position of the legs pointing downwards when working at an angle to the slope.

The excavator has a chassis frame 1 with a rotatable platform 6 which carries the motor unit for generating the pressure for the hydraulic system which is used to actuate the lifting cylinders 3 ». 4 and 5. is used. The platform 6 is rotatable about the vertical axis 2 and carries the cabin 7 for the operator above the motor unit. The support 8 is also connected to the platform 6, on which the boom 9 can be pivoted about the horizontal axis 12. The excavator shovel 11 sits at the free end of the second boom arm 10. The boom becomes more familiar via the control system in the cabin Way pivoted.

90985171226

The chassis 1 (frame) is supported on one side by a pair of wheels 15, on its other side by boom 1? with vertically adjustable footrests 18. The ^! Wheels 15 do not have their own drive.

The axis 20, which represents the connection between frame 1 and pair of wheels 15, is portal-like and U-shaped

P downward leg 21 formed. Duroh The excavator can bridge this axis shape over a wide span, as shown in FIG. 1 schematically. The length of this downwardly directed leg 21 is expediently greater than the Durohmesser D of the wheels I5. In addition, if the legs 21 are height-adjustable with respect to the supporting horizontal beam 22, which forms part of the Aohee according to the invention, then the axis is 20 of the excavator to a large extent adaptable to the most varied of terrain formations, so that even dredging work in asymmetrical trenches or diagonally. partially inclined Hanging can be done (see Fig. 3). The wheels 15 or wheel hubs were advantageously pivotable stored, the Sehwenkplane of the wheels or wheel hubs is in the Sbenö of the portal-like axis 20. Through this it is possible, the wheels 15 always perpendicular to the graph

'909861/1228. "

put on embankment 24 (Fig. 1). For this purpose, the legs 21 of the portal-like axis 20, which are near the bottom, carry laterally cantilevered, sector-shaped ones at the lower end Tabs 23 with a plurality of holes 25 preferably lying on an arc of a circle for receiving a die Position of the bolt fixing the wheel hub axis.

To enable adaptation to the most varied of terrain formations, the horizontal beam 22 is designed to be variable in its effective length, whereby it is advantageously made of telescopically slidable tube or tube. Box profiles. These profiles are fixed in their mutual position to one another by means of socket pins. This allows gauges of up to 8 m and more to be achieved. Thus, the excavator bucket 11, which is shown in Fig. 1 because the Übersichtliohkeit nioht, can reach any point of the long-span trench, the frame 1 is of the horizontal beam 20 slidably superposed with respect to _r ge. >. '''

Clamp-like clamping claws 26, which are advantageously U-shaped are designed, hold the frame 1 on the horizontal beam 22 firmly. JSaoh loosening the clamping screws 27 becomes the frame

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moved by means of the boom to be supported on the ground relative to the horizontal beam.

It goes without saying that the supports 18 are also horizontal at the same time pivotable arms 17 mounted adjustable in height.

The height adjustability of the supports 18 and legs 21 is achieved in a simple manner that into each other sliding box or pipe profiles are provided and the profiles against each other either by clamping action braced or locked against each other by means of insertable bolts.

909851/1226

Claims (9)

Patent claims? 1.) Support structure for an excavator, the substructure of which at least on one side is a non-drive Pair of wheels and height-adjustable on the other side Having footrests, characterized in that the wheels (15) of the pair of wheels on a horizontal beam (22) are stored and between the horizontal beam (22) and each wheel (15) is provided with a downwardly directed leg (21) and the length of the downwardly directed Leg (21) is larger than the wheel diameter (D), creating a U-shaped lame. 2. Support structure according to claim 1 _9, characterized in that the legs (21) are adjustable in height with respect to the horizontal bar (22) of the U-shaped frame. 3 · UnierstÜtzkonst'ruktipn according to claims 1 and 2, thereby characterizedj that the wheel hubs are pivotably mounted are and the pivot axis of the wheel hubs in the Level of the U-shaped frame (21, 22) is » 909051/1226 4. Support structure according to claim 3 _t marked- * characterized in that the legs (21) of the U-shaped frame carry laterally projecting tabs (23), with several preferably lying on a circular arc holes (25) for receiving the position of the wheel hub plane fixing bolt. . 5. Support structure according to claim 1, characterized in that the horizontal beam (22) of the U-shaped Frame can be changed in length, preferably the horizontal beam from telescoping one inside the other displaceable pipe or box profiles. 6. Support structure according to claim 1, characterized in that that the sub-frame (1) is displaceable with respect to the horizontal bar (22) of the U-shaped frame is stored. 7 · Support structure according to claim 6, characterized in that the substructure (1) by means of clamp-like Clamping claws (26) is fixed to the horizontal bar (22) of the U-shaped frame, the clamping claws preferably are designed as U-profiles ·. 909851/122 6 8. Support structure according to the preceding claims, characterized in that the length of the horizontal bar (22) of the U-shaped frame is more than twice of the wheel diameter meter (D). 080569 9 0 9 8 51/1226