JP2543040Y2 - Excavator base machine - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a base machine of an excavator for excavating a hole for forming a continuous wall in the ground.

[0002]

2. Description of the Related Art This type of excavator is constructed by mounting a boom 2 on a base machine 1 and suspending an electric or hydraulic excavator 3 on the boom 2 as shown in FIGS. You.

[0003] The base machine 1 employs a crane body, that is, a lower traveling body (usually a crawler type as shown in the drawing) 4 on which an upper revolving body 5 is mounted so as to be rotatable about a vertical axis X. .

In the drawing, reference numeral 6 denotes a revolving frame of the upper revolving superstructure 5,
Reference numeral 7 denotes a guard (a hatched portion in FIG. 7) that covers an engine and hydraulic equipment (not shown) mounted on the turning frame 6, 8 denotes a counterweight mounted on the rear end of the turning frame 6, and 9 denotes a counterweight. Cabin, which is a cab for operating a crane such as running and boom undulation, etc.
Reference numeral 0 denotes a pair of left and right gantry frames (a so-called A frame) provided substantially at the center of the revolving frame 6, and 11 denotes a boom-hung gantry attached to the gantry frames 10, 10.

On the other hand, such an excavator uses various working facilities which are not included in a normal crane.

For example, in the case of an excavator using an electrically driven excavator 3, cables for transmitting and receiving signals between various measuring instruments and the base machine 1 and for transmitting and controlling power to the excavator 3 are required. Therefore, a plurality of cable reels for winding each cable are provided.

On the other hand, in the case of an excavator using a hydraulically driven cutter or bucket as the excavator 3, a hydraulic unit is provided as a drive source.

[0008] It is desirable that such work equipment be installed on the upper revolving unit 5 of the base machine 1 so that it can move together with the base machine 1 and revolve with the upper revolving unit 5.

[0009]

In this case, as a space for the upper swing body 5 for installing these work facilities,
There is a space from above the guard 7 to above the counterweight 8.

Therefore, it is conceivable to mount a work base on the guard 7 at an optimum position for installing the work equipment in this space (space above the upper swing body 5), and mount the work equipment on this mount. .

However, the guard 7 is merely a cover for covering the equipment and the like, and cannot support a heavy working equipment such as the cable reel and the hydraulic unit at all.

For this reason, conventionally, as shown in the figure, a gantry 12 is assembled on a counterweight 8 which is a structure having a sufficient strength, and work equipment (for simplicity of the drawing, only a gantry 12 is mounted on the gantry 12). A (shown by a square).

However, according to this configuration, the gantry 12 and the work equipment A protrude rearward greatly as shown in the figure, so that the rear end turning radius Y of the upper turning body 5 becomes large, and workability in a particularly narrow site is improved. Was to be lowered.

Accordingly, the present invention provides a base machine of an excavator capable of efficiently mounting work equipment on an upper revolving structure and minimizing a rear end turning radius of the upper revolving structure.

[0015]

According to a first aspect of the present invention, an upper revolving structure is mounted on a lower traveling structure so as to be rotatable about a vertical axis, and the upper revolving structure includes a revolving frame and a revolving frame mounted on the revolving frame. A gantry frame provided, and a counterweight attached to the rear end of the revolving frame, in a base machine of an excavator in which a gantry for boom undulation is mounted on the gantry frame, A rear mount base is attached to each of the counterweights, and an equipment mount on which work equipment such as a cable reel is mounted is provided across the front and rear mount bases.

According to a second aspect of the present invention, in the configuration of the first aspect, a plurality of suspension arms are suspended from the equipment rack, and a lower equipment rack on which work equipment is mounted is supported by the suspension arms. .

[0017]

As described above, the gantry frame is attached to the gantry frame and the counterweight having sufficient strength, and the equipment gantry is provided between the gantry bases. Can be used.

Therefore, the amount of the gantry or work equipment protruding from the counterweight can be zero or minimized. For this reason, the rear end turning radius of the upper turning body can be reduced.

Further, according to the configuration of claim 2, according to claim 1,
Since the lower equipment rack is suspended via the hanging arms by the equipment rack described above, in the case of an excavator having a large number of working facilities, the equipment can be distributed and installed between the upper equipment rack and the lower equipment rack.

In addition, since it is not necessary to add a structure for supporting the lower equipment frame to the revolving frame, it can be easily implemented at a low cost with an existing base machine.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS.

21 is a base machine according to this embodiment,
Reference numeral 22 denotes a boom, and 23 denotes an excavator.

The base machine 21 has an upper revolving unit 25 mounted on a lower traveling unit 24 so as to be pivotable about a vertical axis X, as in the prior art.

The upper revolving unit 25 includes a revolving frame 26, a guard 27 (shown in FIGS. 1 and 3) for covering an engine and hydraulic equipment (not shown), a counterweight 28, a cabin 29, a pair of left and right gantry frames 30, The gantry frame 30 is provided with a gantry 31 for boom raising and lowering.

In the base machine 21, as shown in detail in FIG. 2 and subsequent figures, a front mount base 32 on the gantry frames 30, 30 and a rear mount base 33 on the counterweight 28 respectively extend the upper revolving unit 25 to the width. The equipment mounts 34, 34, which are mounted horizontally so as to cross in the direction,
35 is a space S for engine maintenance between each other.
(See FIGS. 3 and 4) so as to secure them.

More specifically, both the front and rear mount bases 32, 33 are made of a shaped steel such as an H-section steel, and the front mount base 32 is made of gantry frames 30, 30 as shown in FIG. Are detachably attached to the gantry 31 at positions on the upper surface thereof by bolts 36.

The rear frame base 33 has a plurality of mounting legs 37 on the lower surface as shown in FIG.
3 do not protrude rearward than the counterweight 28, and the mounting legs 37...
8 are detachably attached.

Each of the equipment bases 34, 35 on both sides has a frame structure (a deck structure in which a plate is attached to the frame), which is formed by combining shaped steel, and has a front portion as shown in FIGS. The rear end is detachably attached to the rear base base 33 by a bolt 39.

Thus, the gantry frame 3 having sufficient strength within the turning radius of the rear end of the upper turning body 25.
Equipment frames 34 and 35 are provided above the revolving unit 25 using the counterweights 28 and 0, 30 and the counterweight 28.
The work equipment B such as a cable reel and a hydraulic unit is installed at 4, 35.

Therefore, according to this configuration, the frames 34, 3
5 or the working equipment B mounted thereon, the rear end turning radius of the upper turning body 25 is originally (the back of the counterweight).
There is no possibility that the turning radius Z becomes larger than the turning radius Z.

In addition, the large space above the upper swing body 25 can be used as the installation space for the work equipment B, so that the installation space can be expanded.

On the other hand, in this base machine 21,
A lower facility mount 40 is provided in addition to the both-side mounts 34 and 35.

The structure of the lower equipment frame 40 will be described in detail. A plurality of suspension arms 41 are suspended from the left end of a left equipment frame 34 (hereinafter, referred to as an upper equipment frame) for distinction.
The left end of the lower equipment rack 40 is supported by the suspension arms 41.

As shown in FIG. 4, the suspension arms 41 are suspended by the projections 43 of the plate 42 attached to the upper end thereof being engaged with the projections 44 provided on the upper surface of the upper equipment stand 34. Have been. The lower ends of the suspension arms 41 are passed through a guide member 45 composed of a pair of plates provided on the left end surface of the gantry 40, and the lower ends thereof are nuts 46 and 4.
It is stopped at 6.

On the other hand, the right end of the gantry 40 is provided with bolts 47 at the lower part of the guard 27 (so-called guard deck) at a plurality of front and rear portions.
It is attached detachably.

In this way, the upper and lower equipment bases 34, 3
Working equipment can also be installed on this lower equipment base 40 together with 5. For this reason, it becomes particularly suitable for an excavator having many working facilities.

In the illustrated example (FIGS. 1 and 2), the excavator using a motor-driven mill as the excavator 23 in the example shown in FIGS.
3 shows a side unit C in which a control panel box C1 accommodating a control panel for performing power transmission and control with respect to 3 and a side cabin C2 for digging operation different from the original cabin 29 are integrated.

Incidentally, the shape, size, and structure of each of the equipment bases 34, 35, and 40 can be variously selected according to the type, quantity, weight, and the like of the work equipment to be installed.

In addition, in this base machine, as a general rule, the mounts 34, 35, 40 and the work equipments B, C do not protrude from the original rear end turning radius Z.
35 and 40 are constructed, and in some cases, these mounts 34 and 40 are slightly protruded from the rear end turning radius Z.
35 and 40 may be configured.

On the other hand, the lower equipment frame 40 may be provided as needed, for example, when there are many work facilities.

[0041]

As described above, according to the present invention, a gantry frame and a counterweight having sufficient strength are mounted on a gantry base, and an equipment gantry is provided between the two gantry bases. Can be utilized as an installation space for work equipment.

Accordingly, the amount of protrusion of the mount from the counterweight or the work equipment mounted thereon can be reduced to zero or minimized, so that the turning radius of the rear end of the upper structure can be reduced, and workability in narrow places can be improved. Can be improved.

According to the invention of claim 2, according to claim 1,
Since the lower equipment rack is suspended from the described equipment rack via the hanging arm, in the case of an excavator having a large number of work facilities, the equipment can be distributed and installed between the upper equipment rack and the lower equipment rack.

Further, since it is not necessary to add a structure for supporting the lower equipment base to the revolving frame, the revolving frame can be easily implemented on an existing base machine at low cost.

[Brief description of the drawings]

FIG. 1 is a schematic side view of a base machine according to an embodiment of the present invention.

FIG. 2 is an enlarged side view showing the equipment base.

FIG. 3 is a plan view of the same.

FIG. 4 is an enlarged front view of the same.

FIG. 5 is an enlarged sectional view taken along line VV of FIG. 3;

FIG. 6 is a schematic side view showing a conventional base machine.

FIG. 7 is a plan view of the same.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 21 Base machine 24 Lower traveling body 25 Upper revolving structure 26 Revolving frame 28 Counter weight 30 Gantry frame 31 Gantry 32 Front mount base 33 Rear mount base 34, 35 Equipment mount B Work equipment mounted on equipment mount 40 Lower equipment mount 41 Hanging arm C Work equipment mounted on the lower equipment stand

Claims (2)

(57) [Scope of request for utility model registration] An upper revolving structure is mounted on a lower traveling body so as to be rotatable about a vertical axis, the upper revolving structure includes a revolving frame, a gantry frame provided on the revolving frame, and a rear frame. An excavator base machine comprising a counterweight attached to an end, and a gantry for boom undulation mounted on the gantry frame,
A front mount base is mounted on the gantry frame, and a rear mount base is mounted on the counterweight, and an equipment mount on which work equipment such as a cable reel is mounted is provided across the front and rear mount bases. A base machine for an excavator. 2. The excavator base machine according to claim 1, wherein a plurality of hanging arms are hung on the equipment rack, and a lower equipment rack on which work equipment is mounted is supported on the hanging arms. And excavator base machine.