JP2954913B2 - Swiveling 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 technique relating to a relation between an auxiliary entrance / exit provided in front of a turning frame, a swing frame support, a crawler type traveling device, and a driver's seat in a turning type excavating work vehicle such as a backhoe. is there.

[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, see
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 if the crawler-type traveling device cannot be rotated by 60 degrees, the crawler-type traveling device can be stored in a narrow space where the crawler-type traveling device can travel, in addition to the crawler-type traveling device 14 being disposed. The rear of the revolving frame is configured in a circular shape arranged within the width of the left and right crawler traveling devices, and a small rear turning type excavating work vehicle capable of making a small turning only at the rear is provided. It is. Further, in such a turning type excavating work vehicle, when the main entrance / exit c is closed due to a narrow open field or the like, an auxiliary entrance / exit a is provided to enable entry / exit from the opposite side. It is configured so that the operator can step on and off the vehicle.

[0004]

The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described. A swivel frame 19 is mounted on the crawler type traveling device 14 so as to be swivelable by a swivel table bearing 16, and a swing frame support portion 35 for pivotally supporting a working machine is provided at a front portion of the swivel frame 19 so as to protrude forward. In a revolving excavating work vehicle having a rear outer edge shape of the revolving frame 19 in an arc shape centered on the revolving table bearing 16 of the revolving frame 19 in a plan view, the swing frame supporter 35 for attaching a working machine is provided. An auxiliary entrance / exit a is provided on the outside in the left / right direction and diagonally forward of the driver's seat 15 on the opposite side of the main entrance / exit c to support the swing frame.
The right and left crawler-type traveling devices 1 are located at the front central position
4 is located near the approximate middle position of the
The exit a is the outermost of the left and right crawler traveling devices 14
At the position where it enters inside the side width,
The auxiliary entrance a is above the crawler traveling device 14
And the crawler-type traveling device 1
4 of the auxiliary entrance a open forwardly upwardly and laterally above the
A discharge space is formed .

[0005]

Next, an embodiment 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 attached to the swing frame 8.
Is pivotally supported 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 disposed at the rear of the driver's seat 15, and the canopy 11 protrudes above the driver's seat 15 from the canopy base 12. A handle 23 is arranged 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 side of the driver's seat 15 is formed as a notch b, and this portion is used as an auxiliary entrance a. 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 about the turning table bearing 16 is disposed at a position where the step 2 is removed.
The lower part of the turning motor 1 is shown projecting from the turning frame 19. As shown in FIG. 2, a radiator grill 20 for discharging exhaust air from the radiator R to the outside of the bonnet 22 is mounted on the right side of the bonnet 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, a description will be given with reference to FIG. 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 support portion 35 protrudes forward from a substantially central portion of the front end face 5, and a pivot hole of the swing pivot pin 6 is formed in the swing frame support portion 35. By the swing pivot pin 6 fitted in the pivot hole,
The swing frame 8 is pivotally supported, 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 the 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, on the crawler-type traveling device 14, the swivel frame 19 is mounted on the swivel table bearing 16.
The swing frame 19 is provided so as to be pivotable, and a swing frame support portion 35 for pivotally supporting the working machine is provided at the front of the pivot frame 19 in a forwardly projecting shape. Swivel bearing 16
Is formed in an arc shape centered on the
Swing the work machine left and right at the frame support 35
The work equipment can be placed in parallel with the wall or fence.
In this state, it became possible to dig trenches with buckets.
You. In addition, the portion of the swing frame support portion 35 is formed by trenching.
When turning to the outermost position due to
19 from the left and right ends of the left and right crawler-type traveling devices 14.
Because it does not come out, the revolving excavator can be moved to the wall or fence
The ditch can be dug up to that point.

Secondly, in the revolving excavator, an auxiliary entrance / exit a is provided in front of the driver's seat 15 on the left / right side of the swing frame support portion 35 on which the working machine is mounted and opposite to the main entrance / exit c. Therefore, on the opposite side of the driver's seat 15 and beside the swing frame support 35, the driver's seat 15
Can be provided in front of the driver's seat 1 when the main entrance c is closed by a narrow field or the like.
5, but it is possible to get on and off from the auxiliary entrance a. As a result, excavation work by a revolving excavator in a narrow open field can be easily performed. In addition, turning
Swing frame support 35 provided in front of frame 19
When is located at the front center position and near the substantially middle position between the left and right crawler traveling devices 14, the auxiliary entrance / exit a is configured to face above one crawler traveling device 14. Since the left and right empty spaces on the left and right sides of the frame support portion 35 can be configured as the auxiliary entrances a, the narrow space above the turning frame 19 can be effectively used.

Third, it is provided at the front of the revolving frame 19.
When the swing frame support portion 35 is located near the middle position between the left and right crawler-type traveling devices 14 at the front center position, the auxiliary entrance / exit a is configured to face above one of the crawler-type traveling devices 14. The crawler-type traveling device 14 is located above and ahead of the auxiliary entrance a
Since an open space is formed on the upper side, it can be used as a substitute for a step by stepping on the crawler type traveling device 14 existing on the left and right sides of the swing frame support portion 35. However, since the crawler-type traveling device can be used instead of the step, getting on and off can be easily performed.

Fourth, it is provided at the front of the revolving frame 19.
The swing frame support 35 is located at the front center position,
It is arranged near the approximate middle position of the crawler type traveling device 14
When the vehicle is in the auxiliary entrance a, the left and right crawler traveling
Position of the device 14, 14 that is inside the outermost width
At the same time, the auxiliary entrance a
It is configured to face above the la-type traveling device 14,
More than the auxiliary entrance a of the crawler type traveling device 14,
By forming an open space above the front and above the sides
Then, swing the swing frame 8 to the right,
Main boom 18, bucket arm 17, and bucket 10
Crawler-type traveling device on the right front of the turning frame 19
Even when the upper surface of 14 is closed,
From the open space on the upper surface of the generated crawler type traveling device 14,
You can get on and off easily. Therefore, even in a narrow open field or the like where an obstacle is present at an outer position very close to the left and right crawler type traveling devices 14, getting on / off from the front of the turning type excavating work vehicle through the auxiliary entrance / exit a. This makes it possible to eliminate a situation in which both entrances are blocked by left and right obstacles.

[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

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Takuzo Kawamura 1-32 Chaya-cho, Kita-ku, Osaka-shi, Osaka Inside Yanmar Diesel Co., Ltd. (56) Reference Open-ended 4-4944 (JP, U) Open-ended Hei 4-65850 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) E02F 9/08 E02F 9/00

Claims (1)

(57) [Claims] 1. A swing frame 19 is pivotally mounted on a crawler-type traveling device 14 by a swivel table bearing 16, and a swing frame support portion 35 for pivotally supporting a working machine is provided at a front portion of the swing frame 19 in a forward direction. A swing-type excavating work vehicle, which is provided in a protruding shape and whose rear outer edge shape is a circular arc centered on the swivel table bearing 16 of the swivel frame 19 in a plan view, attaches a work implement to the swing. Outside the frame support 35 in the left-right direction,
In addition, an auxiliary entrance / exit a is provided diagonally forward of the driver's seat 15 on the opposite side of the main entrance / exit c, and the swing frame support portion 3 is provided.
5 is a front center position of the left and right crawler type traveling devices 14.
When it is located near a substantially intermediate position, the auxiliary entrance
a is the outermost width of the left and right crawler traveling devices 14;
And the auxiliary
The entrance a is located above one crawler type traveling device 14.
The crawler-type traveling device 14
Open above and below the auxiliary entrance a
A swiveling excavator, wherein a gap is formed .