Multi-stage telescopic arm device and deep-digging excavator comprising multi-stage telescopic arm device
A technology of telescopic arms and telescopic cylinders, which is applied in the field of deep excavators, can solve problems such as the inability to lift the inner cylinder, and achieve the effects of prolonging life and improving bending strength
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[0055] Hereinafter, embodiments of the deep excavator according to the present invention will be specifically described with reference to the drawings.
[0056] exist figure 1 Among them, reference numeral 1 denotes a deep digging excavator according to the present embodiment. The deep digging excavator 1 has a vehicle body composed of a crawler-type undercarriage 2 capable of self-propelling and a rotatably mounted undercarriage 2 . The upper rotating body 3 constitutes. This vehicle body is an object to be attached to the multi-stage telescopic arm device 11 described later.
[0057] The upper revolving body 3 is roughly composed of the following parts: a revolving frame 3A as a base; a cab 3B arranged on the front left side of the revolving frame 3A; a counterweight 3C provided on the rear end side of the revolving frame 3A; A structure chamber cover 3D in which mounted equipment (none of which is shown) such as an engine and a hydraulic pump is accommodated therein.
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