JP2954912B2 - 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 the construction of a swing excavator such as a backhoe, an auxiliary entrance provided in front of a swing frame, a tank, a notch in the tank, and a cylinder cover of a swing cylinder.

[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 can be rotated by 60 degrees, the crawler-type traveling device 14 is disposed, and a working machine such as a main boom, a bucket arm, and a bucket is stored therein, so that the crawler-type traveling device can travel. It can be stored in a narrow space. Further, the present invention provides a revolving excavator in which the rear portion of the revolving frame is configured to have a circular shape, and only the rear portion is capable of revolving within the width of the crawler-type traveling device and is capable of small rearward revolving. Further, in such a turning type excavating work vehicle, when the main entrance / exit c is blocked by a narrow open field or the like, an auxiliary entrance / exit a is provided to enable the entrance / exit from the opposite side. Notch b so as to form a wide structure, and a cylinder cover which is placed when passing through the auxiliary entrance a so as to prevent the earth and sand from falling on the swing cylinder even if the earth and sand fall. Is also provided.

[0004]

The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described. According to the first aspect of the present invention, in the turning type excavator, the crawler type traveling device 14 is provided with a plan view.
In the rear outer edge is pivotably supported a circular rotating frame 19, the outer periphery of the revolving frame 19, the width and the same diameter or smaller diameter of the right and left ends of the crawler type traveling device 14, the
The front end face 5 is formed by notching the circular front portion of the revolving frame 19, and the swing frame supporting portion 35 projects forward from the front end face 5, and the revolving frame 19 behind the front end face 5.
A tank is disposed on the front end face, and a space between the tank and the front end face 5 is formed as an auxiliary entrance / exit a.
And a driver's seat at the front end of the hood 22.
The front end portion located on the right side of 15 is constructed linearly
Bonnet covering tank
The outer side of the gate 22 is an arc along the circle of the revolving frame 19.
And the shape is also of the.

According to a second aspect of the present invention, in the swing type excavating work vehicle according to the first aspect, the swing frame support portion 35 is provided.
The swing frame 8 is pivotally supported via a swing pivot pin 6, and a swing cylinder 7 for rotating the swing frame 8 is pivotally supported at one end by an arm of the swing frame 8.
The other end is pivotally supported at the rear of the revolving frame 19, and the switch
The cylinder 7 is covered with a cylinder cover 34,
The cover 34 is attached to the front end face 5 of the revolving frame 19.
Extending forward and to the side of the swing frame support 35
It was established .

[0006]

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.

1, 2, 3, and 4, the overall configuration of a 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 behind the driver's seat 15, and the canopy 11 projects from the canopy base 12 above the driver's seat 15. A handle 23 is arranged on the hood 22 on the right side of the driver's seat 15. Also, the portion where the hood 22 protrudes to the right of the driver's seat 15 is inserted into the diagonal cutout b.
This part is designated as an auxiliary entrance a. Also Bon
The front end of the net 22 is formed as a straight part, and
The space between the front end surface 5 and the front end surface 5 is also formed as the 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 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 grille 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 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. 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 8 pivotally supported by the swing pivot pin 6 on the swing frame support portion 35 and the pivot shaft 36 of 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. As of claim 1, Tan
A bonnet 22 for covering the hood;
Of the driver's seat 15 at the front end of the
Turn to the front
The arm 19 is appropriately retracted from the front end face 5 of the arm 19.
Therefore, the visibility of the operator in the forward and downward direction is improved.
It was possible. Also, the bonnet covering the tank
The outside of the slot 22 is a circle along the circle of the revolving frame 19.
Because of the arc shape , the capacity of the tank can be sufficiently ensured and the auxiliary entrance a can be configured without reducing the capacity of the tank as much as possible.

[0017] The swing cylinder 7 is connected to the
The cylinder cover 34 is covered with a
In front of the front end face 5 of the revolving frame 19, a swing
By extending to the side of the frame support 35,
From the auxiliary entrance a passing over the crawler type traveling device 14
When the operator gets on and off, the falling mud
Since it is stopped by the cylinder cover 34,
Mud is no longer applied to Linda 7.

[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 (2)

(57) [Claims] 1. A swing-type excavating work vehicle, a swing frame 19 having a circular rear outer edge in a plan view is supported on a crawler-type traveling device 14 so as to be swingable. The outer circumference has the same or smaller diameter as the width of the left and right ends of the crawler-type traveling device 14. The circular front portion of the revolving frame 19 is cut out to form the front end face 5, and the front end face 5 swings from the front end face 5. The frame support portion 35 projects forward, and the front end face 5
Place more tanks on the rear portion of the swivel frame 19, constituting Then co between the tank and the front surface 5 to the auxiliary entrance a
And a hood 22 for covering the tank is provided.
In front of the driver's seat 15 at the front end of the Internet 22
The end is constructed linearly and faces the auxiliary
And the outside of the hood 22 covering the tank is
A swiveling excavator, wherein the excavator has an arc shape following the circle of the frame 19 . 2. A swiveling excavation work vehicle according to claim 1.
The swing frame support portion 35
The swing frame 8 is pivotally supported through the
The swing cylinder 7 for rotating the frame 8 has one end
Pivoted on the arm of the wing frame 8 and the other end
The swing cylinder 7 is pivoted to the rear of the
Cover with the cylinder cover 34 and the cylinder cover 34
In front of the front end face 5 of the turning frame 19, swing swing
A swiveling excavator, wherein the excavator extends at a position lateral to the arm support 35 .