JP3127110B2 - Swing excavator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a control section of a rotary excavator such as a backhoe.

[0002]

2. Description of the Related Art Heretofore, a technology relating to a rotary excavator has been known. However, in the conventional swivel type excavator, since the seat grip is provided on the seat itself, sufficient safety and strength cannot be obtained. In addition, a fuel gauge for checking the remaining amount of the fuel tank was provided outside the fuel tank, so that an operator sitting on the seat could not see it. Also, the bracket of the part that pivotally supports the rear end base of the swing cylinder,
Regardless of the frame vertical ribs and the side plate of the revolving frame, the revolving frame was standing upright on the revolving frame, so that it was impossible to make the revolving frame compact.

[0003]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned disadvantages of the prior art, and provides a compact structure which can improve the strength of the seat grip 3 and can be arranged inside the revolving frame F. It is. In addition, the fuel gauge 2 which is conventionally invisible to an operator sitting in the seat S is arranged on the front side of the seat S so that the driving state can be constantly monitored. is there. Further, since a large load is applied to the rear end of the swing cylinder 4, sufficient strength is required. In the present invention, the bracket 8 that pivotally supports the rear end of the swing cylinder 4 is fixed by welding between the frame vertical rib 9 and the portion of the turning frame side plate 10.
The structure was simple enough to provide sufficient strength.

[0004]

The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described. That is, the resin cover 7 is interposed between the mounting bracket 6 in which the seat grip 3 that is disposed beside the seat S of the revolving excavator and avoids a fall during turning is disposed inside the resin cover 7. It is tightened and fixed in the state of being clamped.

Further, a fuel tank 1 is arranged on a turning frame F of a turning type excavator, and a fuel gauge 2 for displaying a remaining amount of the fuel tank 1 is provided on a front side of a position where an operator sitting on a seat S can confirm. It is arranged on the side.

Further, the rear end of the swing cylinder 4 for swinging the work machine of the revolving excavator is pivotally supported on a bracket 8,
The bracket 8 is fixed between a frame vertical rib 9 and a turning frame side plate 10.

[0007]

Next, examples will be described. FIG. 1 is a left side view of the revolving excavator of the present invention, FIG. 2 is a side view showing a support portion of a seat grip 3 arranged on a side of a seat S, and FIG. FIG. 4 is a side view showing a portion of the swing cylinder 4, the fuel tank 1, and the hydraulic oil tank 5, FIG. 5 is a side view showing a support portion of the seat grip 3, and FIG. FIG. 4 is a plan view of a bracket 8, a frame vertical rib 9, and a revolving frame side plate 10 that pivotally support the bracket.

Referring to FIG. 1, the overall configuration of the rotary excavator will be described. The revolving frame F is supported on the crawler traveling device 16 via a revolving table bearing 17 so as to be rotatable 360 degrees. A boom pivot 2 is provided at the front of the turning frame F.
1 is pivotally supported by a pivot pin 22, and the boom pivot body 21 can be swung right and left by a swing cylinder 4. The boom 11 is pivotally supported by the boom pivot 21, the bucket arm 13 is pivotally supported at the upper end of the boom 11, and the bucket 15 is pivotally supported at the tip of the bucket arm 13.

The boom cylinder 19 rotates the boom 11 up and down, the arm cylinder 12 rotates the bucket arm 13 up and down, and the bucket cylinder 14 scoops and rotates the bucket 15. . Further, a resin cover 7 and a rotatable bonnet 18 forming a fixed hood are covered on the revolving frame F, and an engine room formed by the resin cover 7 and the rotatable bonnet 18 forming the fixed bonnet is provided. Inside, an engine, a fuel tank 1 and a hydraulic oil tank 5 are arranged.
On the revolving frame F, left and right canopy supports 23 and 24 for supporting the canopy C are provided upright. The left and right canopy supports 23 and 24 are formed inside the fixed bonnet 7 and the rotatable bonnet 18.

In the seat grip 3 of the present invention, the mounting bracket 6 erected on the left canopy support 23 in FIG. 2 is disposed inside a resin cover 7 constituting a fixed bonnet. The mounting bracket 6 and the canopy support 23 are fixed close to each other to improve the strength. Then, in a state where the resin cover 7 is covered on the mounting bracket 6, the seat grip 3 is brought into contact with the outside of the resin cover 7 and fixed by bolts. in this way,
The resin cover 7 can be sandwiched between the mounting bracket 6 and the seat grip 3 because the resin cover 7 is a fixed bonnet, and the opening and closing operation is performed only by the rotatable bonnet 18.

As shown in FIG. 2, the fuel gauge 2 is positioned inside the rotatable bonnet 18 and in front of the seat S.
Is erected. Since the fuel gauge 2 is arranged on the front side of the seat S, the operator can see it at any time. The fuel tank 1 and the hydraulic oil tank 5 are disposed in front of and behind the rotatable bonnet 18. Also, as shown in FIG.
A bracket 8 that supports the rear end of the cylinder is fixed below the canopy support 24 on the right side of the inside 24. As shown in FIG. 6, the frame 8 is fixed to the bracket 8 by welding the frame vertical ribs 9 reaching the boom pivot support 21 to reinforce the revolving frame F.
A bracket 8 is welded and fixed to the corner of the intersection between the frame vertical rib 9 and the turning frame side plate 10 of the turning frame F.

As shown in FIG. 3, the right side 24 of the left and right canopy supports 23 and 24 is located in the bracket 8 portion. By providing the bracket 8 at a portion where the strength of the three members of the canopy support 24, the frame vertical rib 9, and the revolving frame side plate 10 converge is large, the bracket 8 becomes No more cracks in the part.

[0013]

As described above, the present invention has the following advantages. That is, the resin cover 7 is interposed between the mounting bracket 6 in which the seat grip 3 that is disposed beside the seat S of the revolving excavator and avoids a fall during turning is disposed inside the resin cover 7. , The load when the seat S is likely to be swung down during turning can be supported by the mounting bracket 6 and the seat grip 3, so that the safety is high.
In addition, since the portion of the mounting bracket 6 that supports the seat grip 3 is hidden inside the resin cover 7, the design can be improved.

Further, the fuel tank 1 is disposed on the revolving frame F of the revolving excavator.
Since the fuel gauge 2 for displaying the remaining amount of fuel is disposed in front of the position where the operator sitting on the seat S can check,
The operator can always monitor the fuel gauge 2 not only when supplying fuel but also during operation, so that running out of fuel does not occur.

Further, the rear end of the swing cylinder 4 for swinging the working machine of the revolving excavator is pivotally supported by a bracket 8, and the bracket 8 is connected to the frame vertical rib 9 and the revolving frame side plate 10. Since it is fixed in the middle, the reinforcing member can also be used, so that the turning radius of the turning frame F can be reduced.

[Brief description of the drawings]

FIG. 1 is a left side view of a swing type excavator according to the present invention.

FIG. 2 is a side view showing a support portion of a seat grip 3 arranged on a side of a seat S.

FIG. 3 is a plan view showing a portion supporting a rear end of a swing cylinder 4. FIG.

FIG. 4 is a side view showing a swing cylinder 4, a fuel tank 1, and a hydraulic oil tank 5;

FIG. 5 is a side view showing a support portion of the seat grip 3.

FIG. 6 is a plan view of a bracket 8 pivotally supporting the rear end of the swing cylinder 4, a frame vertical rib 9, and a turning frame side plate 10.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fuel tank 2 Fuel gauge 3 Seat grip 4 Swing cylinder 5 Hydraulic oil tank 6 Mounting bracket 7 Resin cover 8 Bracket 9 Frame vertical rib 10 Revolving frame side plate

──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-4-319123 (JP, A) JP-A-4-65852 (JP, U) JP-A-58-153253 (JP, U) JP-A-58-153253 140843 (JP, U) Japanese Utility Model Sho 62-35055 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) E02F 9/16 E02F 9/08 E02F 9/26

Claims (3)

(57) [Claims] Claims: 1. A swivel-type excavator which is arranged beside a seat.
A swivel-type excavator, wherein a seat grip for avoiding a fall during turning is fixedly fastened to a mounting bracket in which the resin cover is sandwiched between mounting brackets disposed inside the resin cover. 2. A fuel tank is disposed on a revolving frame of a revolving excavator, and a fuel gauge for displaying a remaining amount of the fuel tank is disposed on a front side of a position where an operator sitting on a seat can confirm. A swiveling excavator characterized by the following. 3. A swivel characterized in that a rear end of a swing cylinder for swinging a working machine of a swivel type excavator is pivotally supported by a bracket, and the bracket is fixed between a frame vertical rib and a swivel frame side plate. Excavator.