JP2002155543A - Turning work machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To miniaturize a machine by reducing the occupation spaces for a swing cylinder, a hydraulic oil tank, and a control valve unit. SOLUTION: The swing cylinder 27 and the hydraulic oil tank 41 are disposed on a turning table 3 in the right side of an operator's seat, a mount 46 is provided on a base plate 3A of the turning tale 3 in such a state as extending over the swing cylinder 27, and the control valve unit 42 is disposed between the hydraulic oil tank 41 on the mount 46 and the swing cylinder 27.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a turning work machine provided with a working portion at a front portion of a turning table.

[0002]

2. Description of the Related Art For example, in a turning machine of a small rearward turning type, a driver's seat is provided slightly to the left of a center on a swivel, an engine is provided below or behind the driver's seat, and a swing cylinder is provided on a right side of the driver's seat. The oil tank and the control valve unit are respectively arranged, and the engine is covered with a rear bonnet, and the hydraulic oil tank and the control valve unit are covered with a side bonnet. The hydraulic oil tank and the control valve unit are arranged back and forth in the side hood, and the side hood is supported by a swivel, and the rear portion communicates with the right front portion of the rear hood.

[0003]

In the prior art, when the machine is large, a swing cylinder, a hydraulic oil tank, a control valve unit, and the like, which are heat generating sources that deteriorate the operating environment, are sufficiently removed from the driver's seat. It can be placed away,
As machines become smaller, there is no space to arrange the hydraulic oil tank and control valve unit in front and back, reducing the operating space, making the heat source closer to the driver's seat, and making it difficult to downsize the machine. Sometimes.

[0004] It is an object of the present invention to provide a turning work machine capable of solving such problems of the prior art. The present invention provides a swing cylinder, a hydraulic oil tank, and a control valve unit arranged in three stages,
An object of the present invention is to provide a turning work machine in which the occupied space is reduced to reduce the size of the machine, and the heat generating sources are integrated into one place so that the operating environment can be improved.

[0005]

A first concrete means for solving the problem according to the present invention is a driver seat 17 on the swivel 3.
Swing cylinder 27 and hydraulic oil tank 4
1 and the base plate 3A of the swivel 3
A mounting table 46 is provided so as to straddle the swing cylinder 27, a hydraulic oil tank 41 is mounted on the mounting table 46, and a control valve unit is provided between the hydraulic oil tank 41 of the mounting table 46 and the swing cylinder 27. 42 is arranged.

As a result, the swing cylinder 27, the hydraulic oil tank 41, and the control valve unit 42 are arranged in three stages up and down, the space occupied by them is reduced, and the size of the machine can be reduced. It is possible to improve the driving environment. A second specific means for solving the problem in the present invention is the hydraulic oil tank 41 and the control valve unit 4 in addition to the first specific means.
The side hood 16 surrounding the opening 2 so that it can be opened and closed
An air circulation hole 3C is formed at a position below the swing cylinder 27 of the base plate 3A.

[0007] This makes it possible to dissipate heat more efficiently from the combined heat generating sources. A third specific means for solving the problem in the present invention is that, in addition to the first or second specific means, the upper surface and the side surface of the hydraulic oil tank 41 are substantially along the upper surface and the side surface of the side bonnet 16. That is, it is formed in a shape. Thereby, the upper body 5 can be formed compact while increasing the capacity of the hydraulic oil tank 41 as much as possible. The fourth specific means for solving the problem in the present invention is, in addition to any one of the first to third specific means, a swivel base 3 attached to the base plate 3A.
Is reinforced and supported by a holding member 45 protruding from the mounting table 46.

[0008] Accordingly, the side cover 3B can be strengthened without being formed as a thick plate, is hardly deformed, and can be easily and firmly attached to the side cover 3B.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. 7 and 8, reference numeral 1 denotes a small back turning type backhoe exemplified as a turning work machine. The backhoe 1 mainly includes a crawler traveling device 2, an upper body 5 having a turning table 3, and an excavating device 4. Have been.
The crawler traveling device 2 rotatably supports a driving wheel 8, a driven wheel 9, and a plurality of rolling wheels 10 at front and rear portions of left and right side frames 7 of a track frame 6, and winds a rubber or iron crawler 11 around these. The drive wheels 8 are configured to be driven by a travel drive source such as a hydraulic motor.

The track frame 6 has a swivel 3 mounted on the upper part of the track frame 6 via a swivel bearing 12 so as to be swivelable about a swivel axis X, and a dozer 13 is mounted at the front part so as to be able to move up and down. The swivel base 3 is formed by welding a frame, a vertical wall, a support base, and the like on a basic base plate 3A, and includes an engine 14, a rear hood 15, a side hood 16, a driver's seat 17, a steering device 18, and the like. The upper body 5 is formed by these components. The control device 18 includes right-hand control means 18R and left-hand control means 18L arranged on the left and right sides of the driver's seat 17.

The front side of the driver's seat 17 of the swivel 3 is in step 2
The excavator 4 is mounted on a front portion of the base plate 3A via a bracket 19 so as to be swingable about a vertical axis. The left and right sides of the revolving base 3 are formed substantially parallel to the front-rear direction, the front part is formed substantially at right angles to the front-rear direction, and the rear part and the corner between the left and right side parts and the front part are formed in a substantially circular arc. These are substantially circular arcs having the turning axis X as the center of curvature, and have a shape in which the left and right side portions and the outer surface of the front portion are located within the turning range.

The excavator 4 pivotally supports each base end of a boom 21 and a boom cylinder 22 on a swing bracket 20 supported on the bracket 19 via a vertical axis, and pivots an arm 23 on the distal end of the boom 21. A bucket 25 is pivotally supported at the tip of the arm 23 so as to be able to swing and dump by a bucket cylinder 26. 5 to 8, a swing cylinder 27 for swinging the swing bracket 20 is disposed on the right side of the base plate 3A of the swivel base 3, and its base is pivotally supported by the base plate 3A.

A weight (counter weight) 30 is provided at a rear portion of the swivel base 3, an engine 14 is mounted on a front side of the weight 30, and a rear hood 15 is provided so as to surround an engine room 31 in which the engine 14 is arranged. The driver's seat 17 is provided on the front side of the rear hood 15 via a mount and a suspension device 32. In the engine room 31, the engine 14 is disposed sideways (the crankshaft is in the left-right direction) with the excavator 4 as a front side, a multiple hydraulic pump 33 is provided on the left side, and a radiator 34 is provided on the right side. I have.

A support frame formed of a pipe material or the like is provided so as to straddle the engine 14 and the hydraulic pump 33. An air filter and other devices are mounted on the support frame. Is provided. In addition, a awning device 36 (or a rope) is provided upright behind the driver's seat 17. Radiator 34
Radiator fan is a suction type and has a rear bonnet 1
Air is sucked from an air hole (not shown) of a side bonnet 16 in which the right side of the rear bonnet 5 and the right front of the rear bonnet 15 communicate with each other, and hot air is discharged outward from the left side of the rear bonnet 15. ing.

A battery 37 is disposed on the left front side of the swivel 3, a fuel tank 38 is disposed on the left side, and a hydraulic oil tank 41 is provided on the right of the swivel 3 in front of the radiator 34.
And a control valve unit 42 and the like, which are covered by the side bonnet 16. The rear hood 15 includes a front hood 15A located on the front side of the engine room 31 and a freely openable hood rear portion 15B located on the rear side for inspection inside the engine room 31.
Side hoods 16 are arranged adjacent to the right side of the hood front portion 15A and the hood rear portion 15B, and each is made of synthetic resin (or sheet metal).

A bonnet front portion 15A is fixed to the swivel 3 and the support frame, rises at the front side of the partition plate 35 and covers the front upper portion of the engine 14, and the left side portion projects to the left side of the driver's seat 17 to protrude from the fuel tank 38. It covers the upper part.
The bonnet rear portion 15B has a front upper portion pivotally supported by a support frame via a hinge so as to be openable and closable, and covers the rear half of the engine 14, the hydraulic pump 33 and the radiator 34, and is opened so that maintenance thereof can be performed. Has become. The side bonnet 16 has a side plate cover 43 attached to the left side surface (the surface on the driver's seat 17 side) of the hydraulic oil tank 41, and a side bonnet cover 44 surrounding the hydraulic oil tank 41 and the like so as to be opened and closed. ing.

In FIGS. 1 to 8, the side bonnet cover 44 includes a hydraulic oil tank 41 and a control valve unit 42.
In addition to covering the radiator 34, the front lower part may be pivotally supported via a hinge, but the left upper part is pivotally supported via a hinge 40 on the upper part of the side plate cover 43 via a hinge 40, The hinge 40 is detachable by moving in the axial direction, and by opening or detaching the side bonnet cover 44, the right side of the swivel 3 is exposed to allow the internal devices to be opened at one time. Maintenance is available.

The side bonnet cover 44 may be pivotally supported at the rear upper portion thereof via a hinge so that the front hood can be opened and closed freely. Also, an air intake port is formed at the front portion thereof. The air sucked from the front side is
Alternatively, the gas may flow to the radiator 34 via the control valve unit 42 and the control valve unit 42. In the side bonnet 16, a mounting table 46 is bolted on the base plate 3 </ b> A so as to straddle the swing cylinder 27. The mounting table 46 is formed by fixing a mounting plate 46B with legs 46A, and standing up and down front and rear support bases 46C on the mounting plate 46B.

The leg 46A of the mounting table 46 has two rear ends and one front right end, which are fixed to the base plate 3A, and a front left end is provided with a bolt on a support projection 19A projecting rightward from the bracket 19. And is mutually reinforced with the bracket 19 above the base plate 3A.
The mounting plate 46B is formed of a flat plate, on which the control valve unit 42 is removably mounted. Front and rear support 4
6C is formed by fixing an angle material serving as a support on the lower surface of the flat plate, and the hydraulic oil tank 41 is detachably mounted on the front and rear support base 46C via a bracket.

Therefore, the control valve unit 42 is disposed above the swing cylinder 27, the hydraulic oil tank 41 is disposed above the control valve unit 42, and the control valve unit 42
Is protected between the swing cylinder 27 and the hydraulic oil tank 41. By arranging the swing cylinder 27, the control valve unit 42, and the hydraulic oil tank 41 in a three-tiered manner, a three-dimensional arrangement utilizing the upper and lower spaces effectively can be achieved, and the planar space can be reduced as much as possible. In addition, these three heat generating sources are combined at one place, and are surely separated from the driver's seat 17 to reduce the influence of heat on the operating environment.

Swing cylinder 2 of base plate 3A
An air circulation hole 3C is formed in the portion opposed to 7, and the swing cylinder 27, the hydraulic oil tank 41, and the control valve unit 42 can be cooled by sucking outside air from the air circulation hole 3C with the radiator 34. A substantially L-shaped holding member 45 protrudes outward from the mounting plate 46B of the mounting table 46, and the holding member 45 is attached to the side cover 3 of the turntable 3.
The upper part of B is reinforced and supported. Although the lower part of the side cover 3B is supported by the base plate 3A, the connection with the mounting table 46 further strengthens the support, so that a thin and lightweight plate material can be used.

The control valve unit 42 includes a left and right traveling motor,
Boom cylinder 22, arm cylinder 24, bucket cylinder 26, swing cylinder 27, dozer cylinder,
A control valve for controlling a swing motor, a service port, and the like is connected in a layered manner, and the operation force of the operation lever is transmitted via transmission means 51 such as a link rod or pilot pressure or the like, and control operation is performed. It is possible.
Above this control valve unit 42, a hydraulic oil tank 41
A space required for piping is provided between the control valve unit 42 and the hydraulic oil tank 41 to protect the control valve unit 42.

The hydraulic oil tank 41 has an outer side surface (right side surface) which is inclined from the rear side to the front side so as to approach the side plate cover 43 and becomes narrower in a plan view. Since the side portion has an arc shape in accordance with the corner portion of the swivel base 3, the capacity of the rear portion of the hydraulic oil tank 41 can be increased as much as possible so as not to interfere with the right front side portion. ing. The hydraulic oil tank 41 has an upper surface inclined downward in two stages from the rear side to the front side by a brake bending process or the like, and is tapered forward in a side view, and the upper surface of the side hood cover 44 is inclined downward. In addition, since the corner portion between the front surface and the front surface has an arc shape, the capacity of the rear portion of the hydraulic oil tank 41 can be made as large as possible so as not to interfere with the front portion.

That is, the hydraulic oil tank 41 and the side plate cover 4
Numeral 3 has a slant nose shape to eliminate the protrusion at the right front of the swivel 3 so as to simplify the design and improve the visibility, and to increase the capacity of the rear of the hydraulic oil tank 41 as much as possible. I have to. A plurality (four in the figure) of the hydraulic oil tank 41 is provided on the side of the driver's seat 17 side.
The stay 47 and the set screw 5
The side plate cover 43 is attached through the second oil tank 2 so that the heat from the swing cylinder 27, the control valve unit 42 and the hydraulic oil tank 41 does not heat the side plate cover 43 between the hydraulic oil tank 41 and the side plate cover 43. In addition, a gap S for securing an air layer sufficient for heat insulation is formed. 53 denotes a suction hose connected to the rear of the hydraulic oil tank 41, and 54 denotes an inlet cap.

A drain pipe 48 is attached to the bottom of the hydraulic oil tank 41, and is connected to a drain plug 50 attached to the base plate 3A via a flexible hose 49. The drain pipe 48 has a substantially vertical mounting portion 48A and a hose connection portion 48B bent from the mounting portion 48A into a substantially L-shape (or a substantially L-shape). Various changes and settings can be made.
Even if there is an obstacle such as the control valve unit 42 between the control valve unit 42 and the base plate 3A, the drain plug 50 can be connected while bending the hose 49 by avoiding the obstacle.
The degree of freedom of the setting position for arranging can be increased.

The present invention is not limited to the above embodiment, but can be variously modified. For example,
The backhoe 1 may be a standard swivel type, an ultra-small swivel type, or the like, and may be a type in which a cabin surrounding the driver's seat 17 is mounted on the swivel 3 instead of the awning device 36.

[0027]

According to the present invention, the swing cylinder 27, the hydraulic oil tank 41 and the control valve unit 4 are described.
2 can be arranged in three upper and lower stages, the space occupied by them can be reduced, the size of the machine can be reduced, and the heat generating source can be integrated into one place to improve the operating environment.

[Brief description of the drawings]

FIG. 1 is a front view of a main part showing an embodiment of the present invention.

FIG. 2 is a right side view of the same.

FIG. 3 is a plan view of the same.

FIG. 4 is a perspective view of a mounting table.

FIG. 5 is a plan view of an upper body.

FIG. 6 is a sectional side view of the upper body.

FIG. 7 is a plan view of the upper body.

FIG. 8 is an overall side view of the backhoe.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 backhoe (turning machine) 3 turntable 3A base plate 5 upper body 15 rear bonnet 16 side hood 17 driver's seat 27 swing cylinder 41 hydraulic oil tank 42 control valve unit 43 side cover 44 side bonnet cover 45 holding member 46 mounting Table 47 Stay

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Hiroo Nakata 64 Ishizukitamachi, Sakai City, Osaka Prefecture Inside the Kubota Sakai Factory (72) Inventor Kazuya Oi 64 Ishizukitamachi, Sakai City, Osaka Prefecture Kubota Sakai Manufacturing Co., Ltd. In-house (72) Inventor Takeshi Ikumura 64 Ishizu-Kitacho, Sakai City, Osaka Prefecture Inside Kubota Sakai Works, Ltd. (72) Inventor Toshinori Ichikawa 64, Ishizu-Kitamachi Sakai City, Osaka Prefecture Inside Kubota Sakai Works, Ltd. Toshiaki Otani 64 Ishizukita-cho, Sakai-shi, Osaka F-term in Kubota Sakai Works Co., Ltd. (Reference) 2D015 BA01 BA04 CA00

Claims (4)

[Claims] 1. A swing cylinder and a hydraulic oil tank are arranged on one side of a driver's seat on a swivel table, and a mounting table is provided on a base plate of the swivel table so as to straddle the swing cylinder. Equipped with a hydraulic oil tank,
A turning work machine, wherein a control valve unit is arranged between a hydraulic oil tank of the mounting table and the swing cylinder. 2. A side hood, which surrounds the hydraulic oil tank and the control valve unit so as to be openable and closable, is provided on a swivel,
The turning work machine according to claim 1, wherein an air circulation hole is formed at a position below the swing cylinder of the base plate. 3. The turning work machine according to claim 1, wherein an upper surface and a side surface of the hydraulic oil tank are formed in a shape substantially along the upper surface and the side surface of the side bonnet. 4. The side cover according to claim 1, wherein the side cover of the swivel table attached to the base plate is reinforced and supported by a holding member protruding from the mounting table. Turning machine.