DE8512238U1 - Wheeled excavator - Google Patents

Description

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O & K Orenstein & Koppel Aktiengesellschaft, Berlin j Mobile excavator

The invention relates to a mobile excavator with a

{ j with respect to the superstructure vertically pivotable

5 · casual lower part, on which a hydraulic cylinder supported on the superstructure engages, and with a boom upper part, which is connected at a pivot point to the boom base and in relation to this in a vertical position Swivel plane is adjustable. In such a mobile excavator with an undercarriage traveling on wheels for driving on public roads and with

one carrying an excavator shovel as a tool

end
swiveling stick on the free V of the boom upper part

there is still a lack of satisfactory solutions,
15 that the boom on the one hand with the longest possible

! part and top part as large a range as possible

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j; I, whereby the one rotating with the hydraulic cylinder

■ Swivel angles of the boom that can be mastered at the moment

; The lower part should be as large as possible, that on the other hand

■ j 20 but also the boom without time-consuming and inconvenience- '<

j], loan refitting or relocating parts of equipment;

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:; into a road driving position with upright

; j casual lower part and horizontally positioned upper jib

'ί part can be brought and then not the

'25 prescribed for public StraEeiwerkehr
Limit height between street level and the highest contour of the boom and also not the prescribed limit width from the steering wheel of the mobile excavator

(.. ": the furthest protruding contour of the boom over-

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'"! 30 steps. The present invention provides a pirak!

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table and simple measure with which the aforementioned wishes and requirements summa = Risch can be met, and consists primarily in the fact that the articulation of the hydraulic cylinder on Boom lower part is arranged in the pivot point between the upper part and the lower part, the pivot point at im essentially vertically upright road division of the lower part as closely as possible below the limit height of the whole to be observed for road operation Mobile excavator lies. The common bearing point for the connection of the upper part with the lower part and For connecting the lower part to the hydraulic cylinder, there is no need for a separate hinge pin connection for the linkage of the hydraulic cylinder to the boom lower part and thus reduces the boom manufacturing costs. The common bearing results with a long, in the upright position to just below the limit height Reaching boom lower part although a long hydraulic likylinder, but this leads to the advantage that a long hydraulic cylinder also has a large stroke results and thereby enables a large pivoting angle of the boom lower part and that the hydraulic cylinder also engages with an enlarged torque lever arm on the lower part of the boom, creating a smaller necessary effort results, which in turn the application of slim, economically manufacturable Hydraulic cylinders made possible. The advantages of the common bearing point for the two boom parts and the Hydraulic cylinders favor the design of the boom on the one hand for setting the road driving position without retrofitting or relocating equipment parts and on the other hand with the greatest possible range

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within the framework of the height limit to be observed for the public road traffic for the upright jib lower part as well as the length limit for the forward jib upper part. For this purpose, in an advantageous further development, the lower boom part can be raised beyond the vertical position by means of the hydraulic cylinder by a predetermined angular amount, preferably by an angular amount determined by the greatest possible extension length of the hydraulic cylinder. The erection beyond the vertical position, for example by an angle of about 10 ° against the direction of travel of the mobile excavator , which exceeds the vertical position, allows an increase in the lower part and upper part length with regard to the boom reach without exceeding the height and length limit for road driving.

The drawing shows a mobile excavator designed with the measure according to the invention. The mobile excavator contains an undercarriage 1 with wheels for road operation and an uppercarriage 2 on which a lower part 3 of the excavator boom is mounted vertically pivotable. The boom lower part 3 is in a pivot point 4 connected to an upper boom part 5, which is opposite to the lower boom part 3 in a vertical pivot plane is adjustable, be it by an upper part cylinder 6 or by a connecting rod with several different setting lengths. On the boom upper part 5 is a cylinder 7 pivotable by means of a stick Stalk 8 stored with an excavator shovel 9. For vertical pivoting of the lower part of the boom 3 opposite the upper carriage 2 is a supported on the upper carriage and acting on the boom lower part Boom cylinder 10. The articulation of this hy-

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draülikzylinders 10 on the lower part 3 is inven- ^ appropriately arranged in the pivot point 4 between upper part 5 and lower part 3, this pivot point 4 at the substantially vertically erected position of the lower part 3 for the one shown in the drawing Road driving position of the excavator boom as close as possible below that to be maintained for road driving Limit height of the entire mobile excavator lies. The possible length of the lower part 3 can be increased, when the lower part 3, as shown in the drawing, by means of the hydraulic cylinder 10 by a predetermined Angular amount can be erected beyond the vertical position, this angular amount preferably immediately through the greatest possible extension length of the hydraulic cylinder 10 is set. The erection of the lower part 3 with an inclination against the direction of travel in turn enables the length of the upper part 5 to be increased within the framework of the requirements for road traffic Limit length for that in the road driving position horizontally forwards over the upper structure and undercarriage protruding upper part 5 with handle 8 and tool 9.

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Claims (2)

& κOrenstein & ι η ■ • · · · 4. a ··· ..... BerlinO 1KoppelAktiengesellschaft, mobile excavator protection claims 1. Mobile excavator with a vertical opposite the superstructure pivotable boom lower part on which a hydraulic cylinder supported on the superstructure engages, and with an upper boom part, which is connected to the lower boom part in a pivot point is and is adjustable in relation to this in the vertical pivot plane TO, characterized in that the articulation of the hydraulic cylinder (10) on the lower part of the boom (3) in the pivot point (4) between the upper part (5) and lower part (3) is arranged, wherein the pivot point (4) '~> ei more vertically upright Road driving position of the lower part (3) as close as possible below that for road driving the limit height to be complied with for the entire mobile excavator. ^! 2. Mobile excavator according to claim 1, characterized in that j 20 that the boom lower part (3) by means of the hydraulic Cylinder (10) by a predetermined, preferably by the greatest possible extension length of the hydraulic cylinder specified angular amount is erectable beyond the vertical position.