JPS605739B2 - excavator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides an upper revolving structure in which a driver's seat and an arm link having an excavator at its tip are supported, and a lower mechanism mainly consisting of a traveling device, which rotates a full 360 degrees in plan view. This invention relates to improvements to a full-swing type excavator that is mounted so that it can perform the following operations.

In a conventional excavator of this type, as shown in FIG.
and the hydraulic system 2 and the prime mover (engine 3), etc.
The upper revolving body 4 is mounted on a revolving base and rotates together, and the upper revolving body 4 is mounted on a lower mechanism 6 mainly consisting of a vehicle body which is driven by a traveling device 5. For this reason, the rotation trace A of the upper revolving structure 4 inevitably requires a larger space than the left and right sides of the lower mechanism 6, which is mainly composed of a vehicle body that is driven by the traveling device 5.

For this reason, when this type of excavator is introduced into a narrow place for work, when the upper revolving body 4 rotates, this upper revolving body comes into contact with or collides with surrounding houses, etc. Since it is not possible to turn the upper revolving body 180 degrees and dump the excavated soil into a dump truck located behind the body of the excavator, there is a problem that work efficiency is significantly hindered. However, recently, a lot of excavation work is carried out in close urban areas, and there is a demand for the introduction of machines that can perform excavation work smoothly and efficiently even in such places. The purpose of this invention is to provide a new excavator with a simple structure that can perform smooth and efficient excavation work in confined spaces.

The invention will now be described with reference to illustrative embodiments. Note that the same reference numerals are used for parts common to the conventional embodiment. In FIG. 2, the upper revolving body 4 is
On the swivel base 4a, there is a boom la that can freely rotate up and down, a digging arm lb connected to the boom la so as to be able to bend up and down, and an excavator attached to the tip of the digging arm lb. It is constructed by mounting an arm link consisting of a body lc, and further mounting a driver's seat 7 parallel to the arm link 1 on the left and right, and a boom la of the arm link 1 and a swivel base 4a. A hydraulic cylinder 2 is provided between the
A hydraulic cylinder 2b for bending and rotating the excavating arm lb is provided between the boom la and the excavating arm lb, and an excavating body l is provided between the excavating arm lb and the excavating body lc.
A hydraulic cylinder 2c is provided to rotate c.

The lower mechanism 6 includes a pedestal 8 that supports the swivel table 4a of the upper swivel body 4 so as to freely rotate through 360 degrees, a hydraulic device 2 including a hydraulic tank, a pump, etc., and a prime mover, on a vehicle body that is driven by a traveling device 5. (Engine) 3 are supported in parallel in the front and rear in that order.

The upper revolving body 4 is mounted on a frame 8 of the lower mechanism 6.
36 in plan view, centering on a pivot axis that coincides with a vertical line opening at a point that approximately bisects the entire front and rear length of the lower mechanism 6 and approximately bisects the left and right middle of the lower mechanism 6.
It is mounted so that it can make a full 0 degree turn. Furthermore, when the arm linkage is in a state where the excavation arm lb is folded and rotated as shown in FIG. It is positioned so as to be mounted on the swivel table 4a, and its front and rear middle portions 1 are formed to fit inside the left and right middle portions of the lower mechanism 6. Therefore, when the excavator configured as described above is put into an excavation work place such as a narrow road in a city area, the boom la of the arm link 1 is raised and rotated, and the excavation arm lb and the excavation body lc are rotated. When carrying out an excavation operation, the arm link is used to carry out the excavator who has dug with the excavator lc at the tip of the arm link 1 by loading it into the loading platform of a dump truck waiting behind the body of the excavator. When the excavator is being scooped up with the excavator lc at the tip of 1, the boom la is raised up while bending and rotating the excavating arm lb of arm link 1 so as to take the position shown in Fig. 2. By rotating the upper revolving body 4 by 180 degrees by rotating the swivel base 4a in this attitude, the upper revolving body 4 can move the arm link 1 to the excavator body without getting stuck on buildings on the left or right side of the narrow road. Since the excavator turns to a rearward position, the extension of the arm link 1 in this position allows the excavator inside the excavator lc to be thrown onto the loading platform of a waiting dump truck following the rear of the excavator body. Become.

Therefore, according to the present invention, excavation work in a narrow space can be
To do this smoothly and efficiently without causing the upper revolving body to contact or collide with a house or the like.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a conventional excavator, FIG. 2 is a side view of the excavator of the present invention, and FIG. 3 is a front view of the excavator of the present invention. Explanation of drawing symbols: 1...Arm link, la.
...Boom, lb...Drilling arm, lc...Drilling body, 2...Hydraulic system, 2a, 2b, 2c...
... Hydraulic cylinder, 3 ... Prime mover (engine),
4... upper revolving body, 4a... revolving base,
5... Traveling device, 6... Lower mechanism, 7
... Driver's seat, 8... Frame. Figure 1 Figure 2 Figure 3

Claims (1)

[Scope of Claims] 1. A boom 1a that can freely rotate up and down on the swivel table 4a, an excavation arm 1b connected to the tip side of the boom 1a so as to be able to bend and rotate up and down with respect to the boom 1a, and the excavation arm 1b.
An arm link 1 consisting of an excavation body 1c attached to the tip of the excavator 1c is mounted thereon, and a driver's seat 7 is mounted thereon to constitute an upper revolving body 4, and the upper revolving body 4 is driven by a traveling device 5. The lower mechanism 6, which is constructed by mounting and supporting the hydraulic system 2 and the prime mover 3 on the vehicle body, has a vertical line that stands at a point that approximately bisects the entire length of the lower mechanism 6 from front to back and approximately bisects the left and right width of the lower mechanism 6. The arm link 1 is mounted so as to make a full 360-degree turn in plan view around the pivot axis that coincides with the line (B), and the arm link 1 has a longitudinal width when the boom 1a is erected by folding in the excavation arm 1b. 1 is positioned on the swivel table 4a so as to be approximately divided into two at the center of the vertical line (B), and its front and rear width 1 is the same as the lower mechanism 6.
An excavator characterized by being formed to fit within the width of the left and right sides of the excavator. 2. The upper revolving body 4 is mounted on the revolving base 4a and includes a boom 1a that can freely rotate up and down, an excavation arm 1b that is connected to the tip side of the boom 1b so as to be able to bend and rotate, and an excavation body 1c that is attached to the tip of the boom 1a. The lower mechanism 6 supports the revolving base 4a of the upper revolving structure 4 on the vehicle body which travels on the traveling device 5. 8, a hydraulic system 2, and a prime mover 3, which are mounted and supported in parallel in this order.