JP3213917B2 - 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 an arrangement of a drain joint, a balance weight and a battery disposed on a revolving frame in a revolving excavator, and a method of adjusting the mounting of an opening / closing hood.

[0002]

2. Description of the Related Art Conventionally, a technique related to a small turning type excavator is known. For example, Shokai 61
This is like the technology described in Japanese Patent Application Laid-Open No. 164354. Further, in the conventional swiveling excavation work vehicle, as shown in FIG. 12, the drain collective joint 305 is arranged not at the center of the swivel joint S but at an eccentric position.

[0003]

The problem to be solved by the present invention is as follows. By arranging the drain collective joint directly on the swivel joint, piping between the traveling motor and the drain block becomes unnecessary, and the area occupied by the drain block can be minimized.
The maintainability around the swivel joint was improved. In addition, since the drain collective joint is arranged at the center of the swivel joint, the length of the drain piping from each hydraulic device and the tightly bent piping are eliminated, and rational piping is made possible. Further, the portion of the joint joint protruding from the drain collective joint radially protrudes from the drain collective joint, so that the arrangement of the hydraulic hose is made reasonable.

Further, in a configuration in which the fixed hood is fixed to the side of the revolving frame so that the opening and closing hood can be partially opened and closed with respect to the fixed bonnet, inconsistency occurs at the joint between the fixed hood and the opening and closing hood, and interference occurs. Or it can occur. In the present invention, the pivot portion of the opening and closing bonnet can be adjusted back and forth, left and right, up and down,
This is to solve the above problem. In addition, by setting the position of the battery that needs to be arranged inside the hood to be the canopy support portion, the storage position of the battery is configured using the extra space in the hood,
The diameter of the turning frame is made as small as possible to constitute a small turning type excavator.

[0005]

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 a small turning type excavating work vehicle capable of turning a substantially circular turning frame within the width of the crawler type traveling device, a drain is provided above a center position of a swivel joint disposed at a rotation center position of the turning frame. A collective joint is provided.

According to a second aspect of the present invention, in the turning type excavating work vehicle, a joint joint protrudes radially from a drain collective joint.

According to a third aspect of the present invention, in a small turning type excavator capable of turning a substantially circular turning frame within the width of the crawler type traveling device, the upper portion of the turning frame is fixed to a fixed bonnet.
Cover with the opening and closing hood, and
A pivot bracket for opening and closing is provided.
At the joint between the pivot bracket and the pivot bracket.
Provide a large-diameter hole in the bracket and adjust the bolt position inside the large-diameter hole.
Adjustable, open and close hood, up and down, left and right, front and back
It is supported in an adjustable manner .

According to a fourth aspect of the present invention, in a small turning type excavating work vehicle capable of turning a substantially circular turning frame within the width of the crawler type traveling device, a balance weight is also used at a position facing the fuel tank and the hydraulic oil tank. The canopy support is provided upright, and a battery storage portion is provided in a part of the canopy support.

[0009]

Next, the operation will be described. That is, by arranging the drain joint directly on the swivel joint,
Since the traveling motor and the drain joint 1 can be directly connected, no piping is required, and the area occupied by the drain joint 1 can be minimized, improving maintainability around the swivel joint. I was able to do it. In addition, since the drain collective joint is disposed above the center of the swivel joint, the length of the drain piping from each hydraulic device and the piping having a large curvature are eliminated, and rational piping is possible. Further, the joint joint can be projected in a 360-degree direction around the drain collective joint 1, and the arrangement of the hydraulic hose can be made reasonable. In addition, it is possible to adjust the interference and displacement between the open / close hood 3 and the fixed hood 4 that occur during the assembly, so that it is easy to assemble the bonnet having a complicated mating surface and a loose link. In addition, the imbalance of the weight generated by disposing the hydraulic oil tank R and the fuel tank T on one side is reduced by the canopy support rods 13, 14, and 15.
Thus, the balance was achieved by the hood support 18 and the canopy support 16. Also, by placing the battery 2 on the canopy support rods 13 and 14, the balance could be maintained. In addition, by arranging the battery 2 and the hydraulic pump P vertically one above the other, the battery 2 can be arranged by utilizing the dead space.

[0010]

Next, an embodiment will be described. FIG. 1 is a side view of a swiveling excavator of the present invention, FIG. 2 is a plan view of the swivel excavator, and FIG. 3 is a plan view of a swivel frame 12 with a fixed hood 4 and an open / close hood 3 removed. FIG. 4 is a plan view showing a state in which the engine E, the hydraulic oil tank R, the fuel tank T, and the like are removed from the turning frame 12, FIG. 5 is a plan view showing an arrangement of various hydraulic hoses on the turning frame 12, 6 is a plan view of a portion of the joint joints 21, 22, 23, 24, 25 protruding from the drain collective joint 1, FIG. 7 is a side view of a portion of the drain collective joint 1 and the joint joint 21, and FIG. 8 is a canopy support. 9 is a rear view of a portion of the canopy support rods 13, 14 and 15, FIG. 9 is a rear view of a pivot portion of the fixed hood 4 and the opening / closing bonnet 3, FIG. 10 is a front view of the rotating bracket 10, and FIG. Active Bra Plan view of Tsu bets 10, FIG. 12 is a view showing the arrangement of a conventional drain set joint.

In FIG. 12, a conventional drain joint 3
The arrangement of 0 and the swivel joint S will be described in detail. In the conventional swiveling excavation work vehicle, a swivel joint S is disposed at the position of the rotation center of the swivel bearing 5,
A turning motor M is fixed to the turning frame 12 at a position on the outer periphery of the turning table bearing 5. Since the drain collective joint 30 was disposed at a position that did not coincide with the center of the swivel joint S, another hose was required between the drain collective joint 30 and the swivel joint S. Then, the pressure oil from a hydraulic pump P attached to the engine E is direction-controlled by a hydraulic control valve V, and is supplied to a swivel joint S from a hydraulic hose collected at a drain collective joint 30, so that the traveling of the crawler traveling device 8 The hydraulic oil is supplied to the hydraulic motor and the hydraulic cylinder of the earth discharging plate 34, and the operated hydraulic oil is returned to the swivel joint S again. The hydraulic oil is collected from the swivel joint S to the drain collective joint 30 by the hydraulic hose, and the hydraulic oil tank R It was returned to.

Referring to FIGS. 1 and 2, the overall structure of the swing type excavator will be described. Right and left crawler traveling device 8
And a swing table bearing 5 is provided at a center position of the crawler type traveling device 8.
Thus, the turning frame 12 is supported so as to be able to turn 360 degrees. A main boom 33 is disposed at the front of the revolving frame 12 so as to be rotatable forward, backward, left and right, and a bucket arm 31 is pivotally supported at an end of the main boom 33. A bucket 32 is pivotally supported at the tip of the bucket arm 31. The upper portion of the revolving frame 12 is covered with a fixed bonnet 4 and an opening / closing bonnet 3, and an engine E, a fuel tank T, a hydraulic oil tank R, and the like are disposed inside. The canopy C is covered around the driver's seat.

The turning type excavator of the present invention is a small turning type, in which the center of the turning table bearing 5 is located substantially at the center of the width of the crawler type traveling device 8, and the turning frame 12 is formed in a circular shape. Even if the turning frame 12 turns 360 degrees, the turning frame 12 can turn within the width of the crawler type traveling device 8.
Therefore, in a place where the crawler type traveling device 8 can travel, it is possible to completely turn 360 degrees.

Next, referring to FIG. 3, the arrangement of each device on the revolving frame 12 of the present invention will be described. Swivel frame 1
A balance weight 19 is disposed on the rear surface of the upper part 2, and an engine E is provided in front of the balance weight 19.
The right side is forward, the left side is rearward, and the front and rear are inclined. A hydraulic oil tank R and a fuel tank T are arranged on the right front of the engine E. As described above, since the fuel tank T, the hydraulic oil tank R, and the engine E are unevenly distributed on the right side, the right side is heavier, so the balance weight 19 and the battery 2 are arranged on the left side to balance. Has taken.

A hydraulic pump P is disposed at a position below the battery 2 on the left side of the engine E. The hydraulic pump P
Is controlled by the hydraulic control valve V and supplied to the swing motor M and the swivel joint S. A drain collective joint 1 that is loosely fitted to the upper part of the center position of the swivel joint S and is rotatable is arranged. FIG. 4 discloses a configuration of a column at a pivot portion of the turning frame 12 and the opening / closing hood 3.

Next, referring to FIG. 5, FIG. 6 and FIG. 7, the structure of the drain collective joint 1 and the joint joint will be described.
The drain collective joint 1 is a member serving as an intermediate part for collecting drain oil from the hydraulic control valve V and the swivel joint S and returning the collected drain oil to the hydraulic oil tank R. Conventionally, the swivel joint S is disposed at a position eccentric to the center of the swivel joint S.
Up until then, a hydraulic hose was needed. In the present invention, the drain joint 1 is fixed to the upper part of the swivel joint S.

The inside of the drain collective joint 1 communicates with the inside of the swivel joint S, and serves as a passage for drain oil from the traveling motor and the earth discharging plate 34. And, from the drain collective joint 1, the joint joints 21 ・ 22 ・ 2
The three joints 21 project from the hydraulic oil tank R to the hydraulic oil tank R. Tank joint joint 22.2
Reference numerals 3, 24, and 25 respectively communicate with the drain from the remote control valve, the drain from the cutoff valve, the drain from the swing motor M, and the like.

Next, referring to FIG.
A configuration in which a storage portion for the battery 2 is provided in the portions 3 and 14 will be described. The canopy support 16 and the canopy support rods 13, 14, 15 are all made of heavy iron plates, and are arranged at positions facing the hydraulic oil tank R and the fuel tank T to balance the weight. taking it.
Further, the mounting table of the battery 2 is fixed at a position at a halfway height of the canopy supporting rods 13 and 14, and the battery 2 is arranged. The weight of the battery 2 balances the right and left weights. Also, below the battery 2,
A hydraulic pump P attached to the crankshaft of the engine E is arranged, and by arranging the hydraulic pump P and the battery 2 vertically one above the other, wasteful space in the hood is effectively used.

Next, with reference to FIGS. 8, 9, 10 and 11, a mechanism for adjusting the pivotal portion of the opening / closing hood 3 which opens and closes relative to the fixed bonnet 4 will be described. A bonnet support 18 and a canopy support 16 are supported on the upper ends of the canopy support rods 13, 14, and 15, respectively. The fixed bracket 17 is fixed to the mounting bracket 7 with bolts 37 on the surface of the hood pivot base 18 on the side of the open / close hood 3. The mounting bracket 7 is welded and fixed to the bonnet pivot support 18. A long hole 17b is formed in the bracket surface 17a of the fixed bracket 17 which is tightly fixed to the mounting bracket 7, and the fixed bracket 17 is attached to the mounting bracket 7 by the length of the long hole 17b. It can be adjusted up and down.

The turning bracket 10 of the opening / closing hood 3 is supported by the fixing side bracket 17 via opening / closing links 38, 39, 40 so as to be able to turn and open. A cushion cylinder 41 is interposed so that the opening and closing of the opening and closing hood 3 is not impacted. The structure of the rotation side bracket 10 is shown in FIGS. 10 and 11. The opening / closing hood 3 and the rotation side bracket 10
Is not a long hole, but a large-diameter hole 10a.
The bolt can be adjusted back and forth and right and left inside the large-diameter hole 10a. This large-diameter hole 10
The opening / closing hood 3 is adjusted to the front / back and left / right at the portion a, thereby enabling the adjustment of the gap at the contact portion between the opening / closing hood 3 and the fixed bonnet 4. Reference numeral 10 denotes a bracket for fitting the opening / closing links 38, 39, and 40.

[0021]

As described above, the present invention has the following advantages. As described in claim 1, in the small turning type excavating work vehicle capable of turning the substantially circular turning frame 12 within the width of the crawler type traveling device 8, the center of the swivel joint S disposed at the rotation center position of the turning frame 12 Since the drain collective joint 1 is disposed at the upper position, by arranging the drain collective joint directly on the swivel joint, the traveling motor and the drain collective joint 1 can be directly connected. Piping is not required, and the area occupied by the drain collective joint 1 can be minimized, so that maintainability around the swivel joint can be improved. In addition, since the drain collective joint is arranged at the center of the swivel joint, the length of the drain piping from each hydraulic device and the tightly bent piping are eliminated, and rational piping is made possible.

According to the second aspect of the present invention, since the joint joint is provided so as to project radially from the drain collective joint 1, the drain collective joint 1
It is possible to project the joint joint in the 360-degree direction around it, and the arrangement of the hydraulic hose can be made reasonable.

According to a third aspect of the present invention, in the small turning type excavating work vehicle capable of turning the substantially circular turning frame within the width of the crawler type traveling device, the upper part of the turning frame is fixed.
Cover with an opening and closing hood,
A pivot bracket is provided to open and close the
At the junction between the Tsu bets and the rotation-side bracket, rotation-side Bed
A large diameter hole is provided in the racket and the bolt position is set inside the large diameter hole.
Can be adjusted, and the opening and closing bonnet can be adjusted
The adjustable hood allows the interference and displacement between the open / close bonnet 3 and the fixed bonnet 4 to occur during assembly, making it easy to assemble the bonnet with complicated mating surfaces and link play. It became.

According to a fourth aspect of the present invention, a canopy support which also serves as a balance weight is erected at a position facing the engine E and the hydraulic oil tank R, and a battery storage portion is provided in a part of the canopy support. The imbalance of the weight caused by disposing the tank R and the fuel tank T on one side could be balanced by the canopy support rods 13, 14, 15, the bonnet pivot support 18, and the canopy support 16. Also, the canopy support rods 13 and 14
The balance could also be achieved by placing the battery 2 on the vehicle. Also, by arranging the battery 2 and the hydraulic pump P vertically one above the other, the battery 2 could be arranged using the dead space.

[Brief description of the drawings]

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

FIG. 2 is a plan view of the revolving excavator.

FIG. 3 is a plan view showing a state in which a fixed hood 4 and an opening / closing hood 3 on a revolving frame 12 are removed.

FIG. 4 is a plan view showing a state in which an engine E, a hydraulic oil tank R, a fuel tank T, and the like are removed from the revolving frame 12.

FIG. 5 is a plan view showing an arrangement of various hydraulic hoses on a revolving frame.

FIG. 6 is a plan view of portions of the joint joints 21, 22, 23, 24, and 25 protruding from the drain collective joint 1.

FIG. 7 is a side view of the drain joint 1 and the joint 21;

FIG. 8 shows a canopy support 16 and a canopy support rod 13.
・ The rear view of the part 14 ・ 15.

FIG. 9 is a rear view of a pivot portion between the fixed hood 4 and the opening / closing hood 3;

FIG. 10 is a front view of the rotation-side bracket 10;

FIG. 11 is a plan view of the rotation side bracket 10;

FIG. 12 is a view showing an arrangement of a conventional drain collective joint.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Drain collective joint 2 Battery 3 Opening / closing bonnet 4 Fixed bonnet 5 Swivel table bearing 7 Mounting bracket 8 Crawler type traveling device 10 Rotation side bracket C Canopy R Hydraulic oil tank S Swivel joint M Swivel motor

────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Haruki Fukahori 428 Enami, Okayama City Inside of Seirai Industry Co., Ltd. (56) References JP-A-5-125742 (JP, A) U) Actual opening Sho 61-76865 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) E02F 9/00

Claims (4)

(57) [Claims] In a small-swing type excavating work vehicle capable of turning a substantially circular turning frame within the width of a crawler type traveling device, a drain is provided above a center position of a swivel joint disposed at a rotation center position of the turning frame. A swiveling excavator equipped with a collective joint. 2. The swiveling excavation work vehicle according to claim 1, wherein a joint joint protrudes radially from the drain collective joint. 3. A small turning type excavating vehicle capable of turning a substantially circular turning frame within a width of a crawler type traveling device, wherein an upper portion of the turning frame is provided with a fixed bonnet and an opening / closing bonnet.
For opening and closing the opening and closing hood with a net
A pivot bracket is provided, and the opening / closing hood and the pivot bracket are provided.
At the joint with the racket, the turning side bracket has a large diameter
With a hole, the bolt position can be adjusted inside the large diameter hole
Opening and closing bonnet can be adjusted up and down, left and right, front and back
A swiveling excavator, characterized by being supported . 4. A small swiveling excavator capable of swiveling a substantially circular swivel frame within the width of a crawler type traveling device, wherein a canopy strut which also serves as a balance weight at a position facing a fuel tank and a hydraulic oil tank. And a battery storage part is provided in a part of the canopy support column.