JPH11324016A - Revolving excavation vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable an operator to get in a cab or get out of it from an opposite side when a main entrance/exit is not available in a narrow alley, in a revolving excavation vehicle. SOLUTION: A swing frame support 35 is protruded at the front part of a circular revolving frame having a front end face 5 on a crawler type traveling device 14 and a tank is arranged on the revolving frame and an auxiliary entrance/exit (a) is formed between the tank and the front end face 5. A part where the auxiliary entrance/exit (a) faces the front side is opened between the side of the swing frame support 35 and the inside of crawler type traveling device 14, and the end of a part where the auxiliary entrance/exit (a) faces the side is opened toward the upper face of the crawler device 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the arrangement of an auxiliary entrance / exit provided in front of a turning frame, a crawler-type traveling device, and a swing cylinder in a turning excavator such as a backhoe.

[0002]

2. Description of the Related Art Conventionally, in a turning type excavating work vehicle such as a backhoe, there has been known a technique of making a turning frame turnable within a small width within a travelable range of a crawler type traveling device. is there. For example, JP
This is as in the technique described in Japanese Patent Application Publication No. 1-67602. Further, a technique in which a swing cylinder is disposed below a radiator in a hood is also known. For example, the technique is disclosed in Japanese Utility Model Laid-Open Publication No. 51-127602.

[0003]

SUMMARY OF THE INVENTION According to the present invention, a revolving frame is provided within a width in which a crawler type traveling device can travel.
Even when the crawler-type traveling device cannot be rotated by 60 degrees, the crawler-type traveling device 14 is disposed at the time of storage, and the rear portion of the revolving frame is configured to be circular, and only the rear portion of the crawler-type traveling device is The present invention provides a revolving excavator that is capable of revolving within a width and is capable of being revolved in a small space that is a space in which a crawler-type traveling device can travel when a bucket is stored. is there. Further, in such a swiveling excavation work vehicle, when the main entrance is closed by a narrow open field or the like, an auxiliary entrance is provided which enables the operator to enter and exit from the opposite side, and the operator enters and exits from the auxiliary entrance. In doing so, the swing cylinder and the crawler-type traveling device can be moved up and down with the foot as a foothold.

[0004]

The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described. In the revolving excavator, a circular revolving frame 19 is supported on the crawler type traveling device 14 so as to be revolvable, and the outer circumference of the revolving frame 19 has the same diameter as the width of the left and right ends of the crawler type traveling device 14. Or a small diameter,
The front end face 5 is formed by notching the front part of the circular turning frame 19, and the swing frame support part 35 is provided to project forward from the front end face 5, and the turning frame 19 behind the front end face 5 is provided.
And an auxiliary entrance a between the tank and the front end face 5, and the auxiliary entrance a is provided on the revolving frame 1.
9 is formed from the front side to the side, and a portion where the auxiliary entrance / exit a faces forward opens between the side of the swing frame support portion 35 and the inside of the crawler type traveling device 14. A swing cylinder 7 for rotating a swing frame 8 pivotally supported by a swing pivot pin 6 is disposed on a swing frame support portion 35, and an end of a portion where the auxiliary entrance / exit a faces sideways is a crawler. The opening is directed toward the upper surface of the traveling device 14.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described. FIG. 1 is a left side view of the swiveling excavator of the present invention as viewed from the seating direction, FIG. 2 is a right side view of the swivel excavator as viewed from the seating direction, and FIG. FIG. 4 is a plan view of the turning type excavator, FIG. 5 is a plan view showing the arrangement of a radiator R, a fuel tank 3 and a hydraulic oil tank 4, and FIG. 6 is a radiator R and a fuel tank. 3 is a rear cross-sectional view showing the arrangement of the hydraulic oil tank 4, the exhaust duct D, and the left side seen from the seating direction, showing the arrangement of the hydraulic oil tank 4, the fuel tank 3, and the radiator R. FIG. 8 is an enlarged left side view showing the relationship between the cylinder cover 34 and the radiator stay 33 when viewed from the seating direction.

Referring to FIG. 1, FIG. 2, FIG. 3, and FIG. 4, the overall configuration of the swing type excavator will be described. The earth discharging plate 13 is disposed between the crawler type traveling device 14 so as to be vertically movable.
In addition, a turning table bearing 16 is provided at the center of the crawler type traveling device 14.
And a turning frame 19 is arranged on the turning table bearing 16. A swing frame support 35 projects from the front of the revolving frame 19, and a swing support pin 6 is fitted into a support hole provided in the swing frame support 35 to pivotally support the swing frame 8. . A main boom 18 is pivotally supported on the swing frame 8 so as to be able to rotate back and forth. A boom cylinder is interposed between the swing frame 8 and the main boom 18. The bucket arm 17 is pivotally supported at the tip of the main boom 18. The bucket 10 is pivotally supported at the tip of the bucket arm 17. A balance weight 9 is attached to the rear end of the revolving frame 19 to obtain the weight and balance of the front working machine.

An operation column 2 is provided at the rear of the main boom 18.
5, and two operation levers 27 protrude from a central portion of the operation column 25, and two operation pedals are provided at lower left and right sides of the operation column 25. The arm 17 and the bucket are being operated. A safety guide 26 is provided around the operation column 25.
Are placed upright. The driver's seat 15 is arranged behind the operation column 25 with a step 2 therebetween. A handrail 24 is disposed on the left side of the driver's seat 15, and a hydraulic oil tank 4 and a fuel tank 3 are provided inside a hood 22 on the right side of the driver's seat 15.
And a radiator R. An engine E is arranged inside the hood 22 at the rear of the driver's seat 15.

A canopy base 12 is arranged at the rear of the driver's seat 15, and the canopy 11 projects from the canopy base 12 to a position above the driver's seat 15. A handle 23 is disposed on the hood 22 on the right side of the driver's seat 15. Further, a portion where the hood 22 protrudes to the right of the driver's seat 15 is formed as a notch b,
This portion is referred to as a front auxiliary entrance a. The front end of the front auxiliary entrance a is located on the side of the swing frame supporting portion 35 and the swing frame 8, and is connected to the crawler traveling device 14.
The swing cylinder 7 and the cylinder cover 34 are disposed at the opening between the swing cylinder 7 and the cylinder cover 34 so that the operator can get on and off using the swing cylinder 7 and the cylinder cover 34 as a foothold. .

The front surface of the bonnet 22 where the cutout portion b is completed is a linear portion orthogonal to the traveling direction, and this portion constitutes a portion on the side of the auxiliary entrance a. The end of the side portion is opened on the crawler type traveling device 14. The main entrance / exit c is on the left side of the driver's seat 15, but when the main entrance / exit c is closed by a narrow open space or the like, it is possible to get on / off from the auxiliary entrance / exit a. As shown in FIGS. 1 and 2, the turning motor 1 for rotating the turning frame 19 around the turning table bearing 16 is arranged at a position where the step 2 is removed, and the lower portion of the turning motor 1 turns. It is shown projecting from the frame 19.

As shown in FIG. 2, a radiator grill 20 for discharging exhaust air from the radiator R to the outside of the hood 22 is mounted on the right side of the hood 22. In addition, an inspection lid 21 for facilitating repair inspection of the engine portion is provided on a rear surface of the hood 22. Next, FIG. 5 will be described. The revolving frame 19 is formed in a circular shape, and a circular arc at a front portion of the circular revolving frame 19 is cut out, and a chord portion of the cutout portion is used as a front end face 5.

A swing frame supporting portion 35 projects forward from a substantially central portion of the front end face 5, and a pivot hole for a swing pivot pin 6 is formed in the swing frame supporting portion 35. The swing frame 8 is pivotally supported by a swing pivot pin 6 fitted in the pivot hole, and the swing frame 8 is rotatable left and right. A main boom 18 is pivotally supported at the front of the swing frame 8 so as to be able to rotate back and forth, and a boom cylinder is interposed between the swing frame 8 and the main boom 18.

Assuming that the distance between the front end face 5 and the center of the swing pivot pin 6 is t, the crawler type traveling device 14 protrudes to a distance 2t which is twice the distance t. At the front, above the crawler-type traveling device 14, a substantially width 2
That is, the leading end portion of the bucket 10 at the time of maximum storage can be arranged. The storage location of the bucket 10 is formed at the left and right portions of the swing frame support 35. The swing cylinder 7 is interposed between the arm of the swing frame support 35 and the turning frame 19. A cylinder cover 34 covers the swing cylinder 7.

The swing cylinder 7 requires a long stroke to sufficiently rotate the swing frame 8 to the left and right. When the swing cylinder 7 expands and contracts to rotate the swing frame 8, a rear pivot shaft 36 is provided. , The swing cylinder 7 and the cylinder cover 34 rotate left and right. Since the rotating portions of the cylinder cover 34 and the swing cylinder 7 overlap below the radiator R, they are configured so as not to interfere with each other. That is, the radiator stay 33 protrudes downward from the front side of the radiator R, and the lower end of the radiator stay 33 contacts the upper surface of the cylinder cover 34 and slides. With this configuration, even if the swing cylinder 7 rotates left and right, it does not interfere with the lower part of the radiator R.

This will be described with reference to FIGS. Driver's seat 15
At the rear, an engine E having a right side forward and a left side rearward inside a hood 22 arranged on the right side.
Are arranged diagonally. A radiator fan F and a radiator R are provided on the right side of the engine E, and a right side of the radiator R constitutes an exhaust duct D. The front part of the exhaust duct D is also used by the rear surface of the hydraulic oil tank 4, the upper part of the exhaust duct D is also used by the lower surface of the fuel tank 3, and the rear part is provided with a rear wall 30. The exhaust air from the exhaust duct D passes through the radiator grille 20 and is discharged to the outside.

In FIG. 6, the lower surface of the fuel tank 3 is formed with a cut-out recess 3a when viewed from the rear, and the radiator R is disposed in the cut-out recess 3a. In FIG. 7, as shown in a side view, a cut recess 4a is also formed in the upper rear surface of the hydraulic oil tank 4, and the front portion of the fuel tank 3 is arranged in the cut recess 4a so as to overlap. .
That is, the radiator R and the fuel tank 3 are vertically overlapped, and the fuel tank 3 and the hydraulic oil tank 4 are vertically overlapped.

[0016]

As described above, the present invention has the following advantages. First, the auxiliary entrance a
Is formed into a forward portion and a side portion, so that the auxiliary entrance a can be configured even on the narrow turning frame 19 formed in a circular shape. Second,
Since the swing cylinder 7 for rotating the swing frame 8 is disposed in front of the front part of the auxiliary entrance a, the swing cylinder 7 can be used as a foothold.
The operator can get on and off. Third
In addition, since the side portion of the auxiliary entrance a is opened above the crawler traveling device 14, it is possible for an operator to get on and off using the upper surface of the crawler traveling device 14 as a foothold. It is.

[Brief description of the drawings]

FIG. 1 is a left side view of a swing type excavator according to the present invention when viewed from a seating direction.

FIG. 2 is a right side view of the revolving excavator when viewed from a seating direction.

FIG. 3 is a rear view of the swiveling excavator when viewed from a seating direction.

FIG. 4 is a plan view of the revolving excavator.

FIG. 5 shows a radiator R, a fuel tank 3 and a hydraulic oil tank 4
FIG.

FIG. 6 shows a radiator R, a fuel tank 3, and a hydraulic oil tank 4.
FIG. 6 is a rear cross-sectional view showing the arrangement of the air discharge duct D and the exhaust duct D when viewed from the seating direction.

FIG. 7: hydraulic oil tank 4, fuel tank 3, and radiator R
FIG. 5 is a left side cross-sectional view as viewed from a seating direction, showing the disposition of the vehicle.

FIG. 8 is an enlarged left side view showing the relationship between the cylinder cover and the radiator stay 33 when viewed from a seating direction.

[Explanation of symbols]

 Reference Signs List 3 Fuel tank 4 Hydraulic oil tank 5 Front end face 6 Swing pivot pin 7 Swing cylinder 8 Swing frame 9 Balance weight 19 Swing frame 33 Radiator status 34 Cylinder cover 35 Swing frame support E Engine R Radiator F Radiator fan

Continued on the front page (72) Inventor Takuzo Kawamura 1-32 Chaya-cho, Kita-ku, Osaka-shi, Osaka Inside Yanmar Diesel Co., Ltd.

Claims (1)

[Claims] In a swing type excavator, a circular swing frame (19) is supported on a crawler type traveling device (14) so as to be able to swing, and an outer periphery of the rotation frame (19) is at left and right ends of the crawler type travel device (14). The front end face 5 is formed by notching the front part of the circular revolving frame 19 having the same diameter or small diameter as the width, and the swing frame support part 35 is provided to protrude forward from the front end face 5, and the rear part from the front end face 5 The tank is arranged on the turning frame 19 of the vehicle, and an auxiliary entrance / exit a is formed between the tank and the front end face 5.
The portion where the auxiliary entrance / exit a faces forward is opened between the side of the swing frame support portion 35 and the inside of the crawler type traveling device 14, and Is provided with a swing cylinder 7 for rotating a swing frame 8 pivotally supported by a swing pivot pin 6 on a swing frame support portion 35. The end of a portion where the auxiliary entrance / exit a faces sideways is a crawler type. A turning type excavator, characterized in that it opens toward the upper surface of the traveling device (14).