JPH09296480A - Turning work machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the operability of a working machine, by providing the driver's seat on the slewing base and providing a fuel tank in the traveling device equipped with the slewing base. SOLUTION: A slewing work machine 1 supports a slewing base 4 on a traveling device 5 and has an excavating device 3 at the front part of the slewing base. The slewing base 4 is rotatable on the traveling device 5. And a driving part 7 constituted of a seat 9 and an operation part 8 is provided on the upper part thereof. And a fuel tank 71 is equipped at the rear part of the traveling machine body 52 of the traveling device 5. Accordingly, since the fuel tank 71 is installed on the traveling device 5, the slewing base becomes spacious and also the engine room on the slewing base 4 can be widened.

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 such as a backhoe.

[0002]

2. Description of the Related Art For conventional turning machines such as backhoes,
There is a vehicle equipped with a swivel on which a driver's seat is provided. However, in a conventional swivel machine of this type, a fuel tank is provided on the swivel.

[0003]

Therefore, conventionally, the space on the swivel is narrowed by the fuel tank, so that the mounting place of the engine arranged on the swivel is limited. In addition, the operating section and step section of the work machine are small, and the operability is poor. Further, there is a problem that the view is limited by the fuel tank.

In view of the above problems, the present invention widens the space on the swivel to allow a wider engine room on the swivel and improves the operability of the working machine.
Also, the field of view on the swivel base is widened.

[0005]

A first technical means of the present invention for solving this technical problem is to provide a swivel base 4 on a traveling device 5 and a seat portion for a driver on the swivel base 4. In the swivel work machine provided with 9, the traveling device 5 has a fuel tank 71.
Is provided.

A second technical means of the present invention is that a swivel joint 77 is provided between the traveling device 5 and the swivel base 4.
The swivel joint 4 is provided so as to coincide with the swivel center Z of the swivel base 4, and the fuel in the fuel tank 71 is supplied to the swivel joint 77.
An oil passage for supplying the engine 19 on the side is provided. Therefore, the space on the swivel base 4 becomes large. Further, from the fuel tank 71 on the traveling device 5 side to the swivel base 4
Fuel can be smoothly supplied to the side engine 19.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. The drawings show an embodiment of the present invention. In the overall views shown in FIGS. 4 to 6, a swivel work machine (backhoe) 1 supports a swivel base 4 on a traveling device 5, and a swivel base 4 is provided in front of the swivel base 4. The excavator 3 is provided. The swivel base 4 is mounted on the traveling device 5 and is a swivel center Z in the vertical axis direction shown in FIG.
It is possible to turn around, and an operating section 7 including a seat section 9, an operating section 8 and the like is provided on the upper part thereof, and a sunshade section 11 is provided above the seat section 9 through a column 10. There is. A dozer device 6 is provided at the front of the traveling device 5.

The excavator 3 includes a swing bracket 26 mounted on the front part of the swivel base 4 so as to swing left and right, and a boom 27 mounted on the bracket 26 so as to be swingable up and down by a boom cylinder 28 extending and contracting operation. An arm 29 attached to the tip of the boom 27 so that the arm cylinder 30 can be swung back and forth by the expansion and contraction of the arm cylinder 30, and a bucket cylinder 32.
The bucket 31 and the like are attached to the tip of the arm 29 so that it can be swung in and swung by the expansion and contraction operation.

As shown in FIG. 6, an engine 19, a radiator 20, a hydraulic pump 21 driven by the engine 19 and the like are arranged at the rear portion of the swivel base 4, and a rear cover 13 that can be opened and closed at the upper side and the rear side thereof is covered therewith. It is being appreciated.
An oil tank 22 is arranged on the swivel 4, and the oil tank 22 is covered with a protective cover 23.
The rear cover 13 is supported via a hinge 16 or the like on a fixed frame formed in a substantially gate shape over the width of the swivel base 4 in the left-right direction, and the upper and left and right sides of the fixed frame are fixed by the fixed frame. It is covered by the cover 15.

The seat portion 9 is arranged so as to be slightly eccentric to the left in the left-right direction of the swivel base 4, and has a recessed portion 18 formed on the upper surfaces of the fixed cover 15 and the rear cover 13.
It is mounted so that it can be fitted into. The swivel base 4
2 has a flat plate-like substrate 35 shown in FIG. 2 at the lower part thereof, and the outer periphery of the substrate 35 is surrounded by a lower cover 37 and a weight 38. Above the lower cover 37 and the weight 38, the rear cover 13 and the fixed cover are provided. The outer shape is formed by providing 15 and the like, and the outer shape is formed in a rear arc shape by making the left and right side portions and the front portion of the swivel 4 flat.

As shown in FIGS. 1 and 2, a pivot 35 is provided on the front of the substrate 35 for pivotally supporting the excavator 3, and a support extending bilaterally rearward from the pivot 39 is provided. A frame 40 is provided, and a mounting hole 41 centering on the swing center Z of the swivel base 4 is provided at a substantially center of the substrate 35, and a hydraulic motor 42 is arranged near the mounting hole 41. As shown in FIGS. 1 to 3, the traveling device 5 includes a traveling machine body 52 having a support base 51 that supports the revolving base 4 so that the revolving base 4 can rotate, and left and right traveling provided on the traveling machine body 52 so as to be positionally changeable in the left-right direction. It has a body 53.

The left and right traveling bodies 53 each have a wheel frame 55, and the driven wheels 5 are provided in front of the wheel frame 55.
6 is provided, a drive wheel 57 that can be rotationally driven by a hydraulic motor is provided at the rear portion, and a plurality of rolling wheels 59 are provided at the lower portion. An endless crawler belt 58 is wound around the driven wheel 56, the drive wheel 57, and the rolling wheel 59 to form a crawler traveling body.

The traveling machine body 52 includes a lower plate 61 and an upper plate 6.
2 and a front plate 63 provided between the lower plate 61 and the upper plate 62, a pair of side plates 64, and a rear plate 65 in a box shape,
The left and right ends of the lower plate 61 are connected to the lower parts of the left and right wheel frames 55, respectively, and the left and right ends of the upper plate 62 are connected to the upper parts of the left and right wheel frames 55 via connecting plates 66.
The support base 51 is fixedly mounted on the upper plate 62, and the revolving base 4 is supported by the support base 51 via the substrate 35 so as to be revolvable around the revolving center Z in the vertical axis direction shown in FIG.

The support base 51 is provided with an internal gear 67 centered on the turning center Z, and a gear of the hydraulic motor 42 is meshed with the internal gear 67.
The swivel base 4 is swung around the swivel center Z with respect to the traveling machine body 52 to the support base 51. A bracket 68 is provided at the front of the traveling body 52,
A dozer cylinder 69 for vertically swinging the dozer device 6 is attached to the bracket 68.

A fuel tank 71 is provided behind the traveling machine body 52. The fuel tank 71 is attached to the traveling machine body 52 so as to be located below the swivel base 4. The fuel filler 72 of the fuel tank 71 is provided at the rear right end of the upper surface of the tank. Normally, the upper part of the fuel filler 72 is covered by the swivel base 4, so that the swivel 4 faces the rear side of the excavation device 3. When the swivel base 4 swivels near 180 °, the swivel base 4 is detached from the fuel filler port 72 and exposed to the outside.

Further, a fuel filter 71a, a fuel pump 71b, and a water separator 71c are provided at the rear end of the fuel tank 71, and these are a protective cover 75.
It is surrounded and protected by. A fuel unit 71d having a fuel gauge and the like is provided at the right end of the fuel tank 71. The traveling body 52
The lower plate 61 and the upper plate 62 are provided with openings 73 and 74, respectively, and a swivel joint 77 is provided so as to vertically pass through the openings 73 and 74. The swivel joint 77 turns with the traveling device 5. It is arranged so as to coincide with the turning center Z of the turning table 4 between the table and the table 4.

This swivel joint 77 is provided on the swivel base 4.
For transmitting the hydraulic motive power of the side to the traveling device 5 side, and as shown in FIGS. 7 and 8, an outer cylindrical body 79 and an inner cylindrical body 80 rotatably inserted in the outer cylindrical body 79. With and
The inner cylindrical body 80 is fixed to the substrate 35 of the swivel base 4 via a mounting plate 81, and the outer cylindrical body 79 is fixed to the front plate 63 of the traveling machine body 52 via a mounting member 82. The lower plate 61 is provided with a swivel joint cover 83 so as to close the opening 73.

As shown in FIGS. 7 and 8, the inner cylinder 80 has an oil passage 86 for oil drain, an oil passage 87 for raising the dozer, an oil passage 88 for lowering the dozer, and a left traveling body. 53 oil passage 89 for reverse traveling, oil passage 90 for backward traveling of right traveling body 53, oil passage 91 for traveling forward of left traveling body 53, oil passage 92 for traveling backward of right traveling body 53, and oil for acceleration A passage 93, an oil passage 96 for sucking fuel, and an oil passage 97 for fuel drain are provided.

The upper end of the oil passage 86 for drain is connected to the oil tank 22 on the swivel 4 side, and the lower end of the oil passage 86 for drain is connected to the hydraulic equipment on the traveling device 5 side. The hydraulic oil from the hydraulic device is returned into the oil tank 22 through the drain oil passage 86. The upper end of the oil passage 87 for raising the dozer is connected to the hydraulic pump 21 on the swivel 4 side, and the lower end of the oil passage 87 for raising the dozer is connected to the dozer cylinder 69 on the traveling device 5 side. The upper end of the oil passage 88 for lowering the dozer is connected to the hydraulic pump 21 on the swivel 4 side, and the lower end of the oil passage 88 for lowering the dozer is the traveling device 5.
It is connected to the side dozer cylinder 69. The upper end of the reverse traveling oil passage 89 of the left traveling body 53 is connected to the hydraulic pump 21 on the swivel 4 side, and the lower end of the left traveling body 53 rearward traveling oil passage 89 is the drive wheel of the left wheel frame 55 on the traveling device 5 side. It is connected to a hydraulic motor that drives 57 to rotate. The upper end of the reverse traveling oil passage 90 of the right traveling body 53 is connected to the hydraulic pump 21 on the swivel 4 side, and the lower end of the rear traveling oil passage 90 of the right traveling body 53 is located at the traveling device 5.
It is connected to a hydraulic motor that rotationally drives the drive wheel 57 of the right wheel frame 55 on the side. Left traveling body 53 Oil passage 9 for forward movement
The upper end of 1 is connected to the hydraulic pump 21 on the swivel base 4, and the lower end of the oil passage 91 for advancing the left traveling body 53 is connected to the hydraulic motor that rotationally drives the drive wheel 57 of the left wheel frame 55 on the traveling device 5 side. To be done. The upper end of the oil passage 92 for the reverse traveling of the right traveling body 53 is connected to the hydraulic pump 21 on the swivel 4 side, and the lower end of the oil passage 92 for the reverse traveling of the right traveling body 53 is the drive wheel of the right wheel frame 55 on the traveling device 5 side. It is connected to a hydraulic motor that drives 57 to rotate. The upper end of the speed increasing oil passage 93 is connected to the hydraulic pump 21 on the swivel 4 side, and the lower end of the speed increasing oil passage 93 is a hydraulic pressure that rotationally drives the drive wheels 57 of the left and right wheel frames 55 on the traveling device 5 side. Connected to the motor.

As shown in FIG. 9, the upper end of the fuel suction oil passage 96 is connected to the engine 19 on the swivel 4 side, and the lower end of the fuel suction oil passage 96 is connected to the fuel filter 7.
1a, fuel pump 71b, water separator 7
It is connected to a fuel tank 71 via 1c, and supplies fuel from the fuel tank 71 on the traveling device 5 side to the engine 19 through a water separator 71c, a fuel pump 71b, and a fuel filter 71a.

The upper end of the oil passage 97 for the fuel drain is the swivel base 4.
Oil passage 97 for the fuel drain connected to the engine 19 on the side
Is connected to a fuel tank 71 at its lower end, and fuel is supplied from the engine 19 on the swivel base 4 side to the fuel tank 7 on the traveling device 5 side.
It is supposed to return to 1. As shown in FIG. 7, an insertion hole 102 for inserting the wire harness 101 is provided in the center of the inner tubular body 80, and an insulator 103 is fixed to the bottom of the inner tubular body 80 by bolts or the like. The cover body 104 is fixed to the bottom of the outer cylindrical body 79. The cover body 104 has a small gap 10 with respect to the insulator 103.
5 are arranged so as to face each other. Insulator 10
Four ring-shaped rotary terminals 106 are fixed to the unit 3.
The rotary terminals 106 are arranged concentrically around the rotation center Z, and are embedded and fixed in the insulator 103 so as to project from the insulator 103 to the cover body 104 side. Four brush holding holes 107 are provided in the cover body 104 so as to face the rotary terminals 106, respectively. Each brush holding hole 1
Each of the brushes 109 is held in an outwardly protruding shape so as to contact the rotary terminal 106, and each brush 109 is rotated by the spring 111 housed in each brush holder 107.
It is being urged toward 06.

The wire harness 101 wired from the swivel base 4 side is inserted into the insertion hole 102 so that each rotary terminal 10
6 is connected. As shown in FIG. 9, the brush 109 is connected to the fuel pump 71b and the fuel unit 71d on the traveling device 5 side via a wire harness. Therefore, from the power source such as the battery on the swivel base 4 side, the fuel pump 71b and the fuel unit 71 on the traveling device 5 side via the wire harness 101, the rotating terminal 106, the brush 109, and the wire harness 101.
Power is supplied to d.

[0023]

As described above, according to the present invention, since the traveling device 5 is provided with the fuel tank 71, the space on the swivel base 4 is widened, so that the engine room on the swivel base 4 can be widened. . Further, the operating section and the step section of the working machine are widened, the operability of the working machine on the swivel 4 is improved, and the visibility on the swivel 4 is widened.

A swivel joint 77 is provided between the traveling device 5 and the swivel base 4 so as to coincide with the swivel center Z of the swivel base 4, and the swivel joint 77 is
The swivel joint 7 is provided between the traveling device 5 and the swivel base 4 so as to coincide with the swivel center Z of the swivel base 4.
7 the fuel in the fuel tank 71 to the engine 19 on the swivel 4 side
Since an oil passage for supplying oil to the swivel base 4 is provided.
Despite being swung with respect to the traveling device 5, fuel can be smoothly supplied from the fuel tank 71 on the traveling device 5 side to the engine 19 on the swivel base 4 side, and inconvenience in work is eliminated.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of the present invention.

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

FIG. 3 is a rear view of the same.

FIG. 4 is an overall side view of the turning work machine.

FIG. 5 is an overall rear view of the turning work machine.

FIG. 6 is an overall plan view of the turning work machine.

FIG. 7 is a side sectional view of the swivel joint.

FIG. 8 is a plan sectional view of the swivel joint.

FIG. 9 is a block diagram showing a distribution route of the fuel.

FIG. 10 is a block diagram showing a distribution route of the oil.

[Explanation of symbols]

 1 Revolving work machine 4 Revolving base 5 Traveling device 9 Seat section 19 Engine 71 Fuel tank 77 Swivel joint

Claims (2)

[Claims] 1. A revolving work machine comprising a revolving base (4) on a traveling device (5), and a driver's seat (9) provided on the revolving base (4). ) Is provided with a fuel tank (71). 2. A swivel joint (77) is provided between the traveling device (5) and the swivel base (4) so as to coincide with a swivel center Z of the swivel base (4). ) Is provided with an oil passage for supplying the fuel in the fuel tank (71) to the engine (19) on the swivel base (4) side.