Deep Digging Excavator
An excavator and deep excavation technology, which is applied to mechanically driven excavators/dredgers, earth movers/shovels, motor vehicles, etc., can solve the problem of difficulty in ensuring the loading capacity and the small height difference of clamshell buckets , Unable to add hanging brackets and other problems to achieve the effect of maintaining digging force
Active Publication Date: 2016-01-13
NIHON KENKI CO LTD
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- Application Information
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Problems solved by technology
[0006] However, if such a suspension bracket is added, when the clamshell bucket is lifted to the ground and positioned on the truck bed, and the clamshell bucket is opened to load excavated sand and soil on the truck bed, the clamshell bucket will The height difference between the bucket and the car body becomes smaller, and it is difficult to ensure a sufficient loading capacity, so it is impossible to add a longer hanger bracket
Therefore, an increase in the excavation depth cannot be expected by adding the hanger bracket
Method used
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[0029] figure 1 , figure 2 It is a side view showing an embodiment of the deep excavator according to the present invention in an excavating state and a state in which earth and sand are loaded on a truck. exist figure 1 , figure 2 Among them, 1 is an undercarriage body, and 3 is an upper revolving body installed on this undercarriage body 1 via a revolving device 2 . The upper revolving body 3 is configured by attaching a hydraulic power unit 4 , a cab 5 , a counterweight 6 , and the like to a revolving frame 3 a. The excavator main body of the self-propelled vehicle is constituted by the undercarriage 1 and the upper revolving structure 2 . Additionally, if figure 1 As shown, the cab 5 can move back and forth, and the operator in the cab 5 can visually view the excavation site in the vertical pit 7 by moving the cab 5 forward during excavation work.
[0030] Reference numeral 8 denotes a boom that can be mounted on the rotary frame 2a so as to be able to move up and ...
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The invention provides a deeply excavating excavator which increases the excavating depth and is realized through simple hydraulic circuit structure without changing the existing structure. A telescoping cylinder (17) is arranged between a telescoping arm and a clamshell type bucket (16); the adjusting valve (50) for turning on / off the bucket (16) and the pipes (53, 54) are used for telescoping of the telescoping cylinder (17) so as to make the turning-on of the bucket (16) performs before the elongation of the telescoping cylinder (17); and the turning-off of the bucket (16) performs before the telescoping of the telescoping cylinder (17).
Description
technical field [0001] The present invention relates to a deep digging excavator in which a telescopic arm is mounted on a self-propelled vehicle through a boom etc., and a clamshell bucket is mounted on the front end thereof. Background technique [0002] A deep digging excavator is known in which a boom is mounted on a self-propelled vehicle so that it can rise and fall in order to dig a vertical pit, and a telescopic boom that can extend downward (a multi-stage boom that can be telescopically assembled using a hydraulic cylinder or the like) is known. components) are mounted on the boom, and a clamshell bucket opened and closed by a hydraulic cylinder is mounted on the lower end of the telescopic boom (for example, refer to Patent Document 1). [0003] In such a deep digging excavator, in order to meet a demand for digging a deeper vertical pit, a crane bracket for deep digging is added between a telescopic arm and a clamshell bucket. [0004] prior art literature [00...
Claims
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IPC IPC(8): E02F5/20E02F3/42
CPCB60Y2200/412E02F3/304E02F3/413E02F9/2264
Inventor 稻元昭多田茂也
Owner NIHON KENKI CO LTD