JPH11269933A - Revolving working machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a revolving working machine intended for improving an environment around its driver's seat and the maintainability of control valves and a hydraulic system and for arranging principal equipment and the like compactly on a revolving base. SOLUTION: A revolving working machine has a driver's seat 9 on one side of a revolving base 7 along the horizontal direction and a valve unit BU in which a number of control valves for controlling hydraulic equipment are aligned in one direction. The valve unit BU is placed at the front of the other side of the revolving base 7 along the horizontal direction in such a manner that the control valves are aligned in the vertical direction. A hydraulic oil tank 14 is placed behind the valve unit BU, and an engine 10 is placed transversely at the center of the rear of the revolving base 7 along the horizontal direction. A radiator 12 is placed on one side of the engine 10 along the horizontal direction, and a hydraulic pump 13 is placed on the other side of the engine 10 along the horizontal direction and behind the operating oil tank 14. A fuel tank 11 is placed in front of a radiator 12, and a battery 15 is placed in front of the fuel tank 11.

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, and more particularly to a turning machine suitable for a small-sized backhoe.

[0002]

2. Description of the Related Art Conventionally, in a backhoe, a swivel is supported on a traveling device so as to be able to swivel around a vertical axis. The hydraulic oil tank is provided on the right side of the swivel, and the hydraulic pump is provided on the rear left side of the swivel.
In addition, the backhoe is provided with a number of control valves for controlling a hydraulic cylinder for swinging a boom, a bucket, an arm, a dozer, a hydraulic motor for rotating a turntable, a hydraulic motor for traveling, and the like. These control valves employ a direct acting spool type switching valve, are arranged in a direction orthogonal to the spool and are integrated into a valve unit, and the valve unit is arranged below the driver's seat in the arrangement direction. It is provided so that it may become the front-back direction.

[0003]

In the prior art, since the valve unit is disposed below the driver's seat, the temperature around the driver's seat may increase due to heat generated from each control valve. In addition, the environment around the driver's seat is deteriorated by the hydraulic noise generated from each control valve, and the maintenance is not so good.

The valve unit may be provided separately from the driver's seat. An engine is mounted at the rear of the turntable, and a hydraulic oil tank and the like are disposed on the right side of the turntable (opposite to the driver's seat). Therefore, it is difficult for a small backhoe to be provided away from the driver's seat. Also, in the conventional one, the hydraulic pump and the valve unit are located on the left side of the swivel table, and the hydraulic oil tank is located on the right side of the swivel table. was there.

[0005] Further, in a small-sized backhoe, main components provided on the swivel table, that is, an engine, a radiator, a hydraulic pump, a fuel tank, a battery, a hydraulic oil tank, a valve unit, and the like are made compact and weight balance is taken into consideration. Must be placed. In view of the above problems, the present invention provides a compact arrangement structure for improving the environment around the driver's seat, improving the maintainability of the control valve, improving the maintainability of the hydraulic system, and the main equipment on the swivel. It is an object to provide an intended turning work machine.

[0006]

The technical means taken by the present invention to achieve the above object is to provide a driver's seat on one side in the left-right direction of a swivel base and a large number of control valves for controlling hydraulic equipment. In a turning working machine provided with a valve unit arranged in one direction, the valve unit is arranged at the front part on the other side in the left-right direction of the swivel table so that the arrangement direction is the up-down direction, and the rear of the valve unit The hydraulic oil tank is arranged on the side, the engine is arranged sideways at the center in the left and right direction at the rear of the swivel, and the radiator is arranged on one side in the left and right direction of the engine, and on the other side in the left and right direction of the engine and Arrange the hydraulic pump behind the hydraulic oil tank,
A fuel tank is disposed in front of the radiator, and a battery is disposed in front of the fuel tank.

In addition, a driver's seat is provided on one side in the left and right direction of the swivel base, and a pair of left and right brackets for supporting the base of the boom are provided on the other side, and a large number of control valves for controlling hydraulic equipment are arranged in one direction. In a turning working machine provided with a valve unit comprising: a valve unit, the valve unit is disposed at a front portion on the side opposite to the driver's seat of the pair of brackets so that the arrangement direction is up and down; A hydraulic oil tank is placed behind the valve unit, the engine is placed sideways at the center in the left and right direction behind the swivel, and a radiator is placed on one side in the left and right direction of the engine. Side, and a hydraulic pump is disposed behind the hydraulic oil tank, a fuel tank is disposed in front of the radiator, and a battery is disposed in front of the fuel tank. And butterflies.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. 1, 2 and 3, 1
Is a small-sized backhoe referred to as an ultra-small turning type exemplified as a turning work machine. The backhoe 1 is mainly composed of an upper swing body 2 and a lower traveling body 3.

The traveling body 3 includes a pair of left and right traveling devices 4 of rubber crawler type, and the left and right traveling devices 4 are supported on a traveling frame 5. The crawler belts of the left and right traveling devices 4 are reversed by a hydraulic motor M1. It is configured to be driven and circulated. A dozer 6 is provided at the front of the traveling body 3 so as to be vertically swingable, and this dozer 6 is vertically swung by a hydraulic cylinder interposed between the dozer 6 and the traveling frame 5. Is configured.

The revolving unit 2 includes a revolving base 7 supported by the traveling unit 3, an excavating device (working device) 8 supported on the front of the revolving base 7, and a driver's seat 9 provided on the revolving base 7. , Engine 10, fuel tank 11, radiator 12, hydraulic pump 1
3. Hydraulic oil tank 14, valve unit BU, battery 15, oil cooler 16, swing motor (hydraulic motor)
M2, cockpit 17, canopy (shading device) 18, engine peripheral devices, and the like.

As shown in FIG. 1, FIG. 4 to FIG. 9 and FIG. 12, the swivel base 7 mounts and supports various devices mounted on the swivel base 7 on a base member 21 made of a thick plate constituting a bottom. And a weight 22 constituting a rear portion of the swivel 7 is attached and fixed to a rear portion to adjust a weight balance with the excavator 8 and the like, and is mainly configured, and a front surface, a side surface, and Appropriate portions of the upper surface are covered with a cover member made of a resin plate, a metal plate, or the like.

The revolving base 7 has a substantially circular shape in plan view. The center of the revolving platform 7 is the vertical axis O of rotation. The base member 21 is connected to the traveling frame 5 via a bearing 23 via the axis of rotation O. It is supported so that it can turn around. The driver's seat 9
The turntable 7 is disposed above the turntable 7 at the center in the front-rear direction on one side (left side) in the left-right direction (left side), and a control table 17 is disposed in front of the driver's seat 9. Operation levers 19 and 20 for operating the device 4 and the excavator 8 are provided.

An excavator mounting portion 24 located on the right side of the driver's seat 9 is provided at a front portion on the other side (right side) in the left-right direction of the swivel 7. In this excavator attachment part 24,
A pair of left and right brackets 25L and 25R made of a thick plate material facing each other at a predetermined interval in the left and right direction are provided,
These left and right brackets 25L and 25R are connected to the base member 2.
1 is fixed by welding. In particular, as shown in FIG. 12, between the left and right brackets 25L and 25R,
The connecting plate 26 connecting the left and right brackets 25L and 25R is provided to be inclined so as to move downward as it goes forward. Before and after the connecting plate 26, the connecting plate 26 and the base member 21 are connected, and the reinforcing plates 27F before and after connecting the left and right brackets 25L, 25R.
27R are provided.

A boom mounting hole 28 is formed in the upper part of the connecting plate 26 in the upper part of the left and right brackets 25L, 25R at substantially the center in the front-rear direction.
A pair of left and right cylinder brackets 2 made of a thick plate material facing each other at a predetermined interval in the left-right direction is provided at the front portion between
The cylinder bracket 29 has a support hole 30 formed therein.

Further, under the left and right brackets 25L, 25R, the reinforcing plates 27F,
A through hole 31 which is a relatively large opening through which hydraulic piping such as a hydraulic piping and a hydraulic hose and an operation cable pass is formed between 27R. The excavator 8 mainly includes a boom 33, an arm 34, and a bucket 35, and the boom 33 includes a first boom section 33A, a second boom section 33B, and a third boom section 33C.

The first boom portion 33A has a support shaft 36 at the base end.
The first boom 33A is supported by the boom mounting holes 28 of the left and right brackets 25L and 25R via a shaft so as to be swingable around the axis in the left and right direction. Swing operation is performed by the expansion and contraction of a boom cylinder 37 interposed between the boom cylinder 37 and the boom cylinder 37. The second boom portion 33B has a base end side swingably supported around a shaft center in a direction orthogonal to the left and right directions via a support shaft, and a third boom portion 33C at the front end side is parallel to the shaft center of the support shaft. Pivotally supported around a central axis, and a first boom portion 33B
The third boom part 33C is connected to the second boom part 33B by a link 39 that forms a parallel quadruple link. Also, the second boom section 33B is connected to the first boom section 33A.
Is moved horizontally by the expansion and contraction of the offset cylinder 40 interposed between the distal end of the second boom part 33B and the middle part of the second boom part 33B.

The arm 34 is supported at its base end side via a support shaft 41 so as to be swingable about a left-right axis.
Is pivoted by the expansion and contraction of an arm cylinder 42 interposed between the base end side of the arm 34 and the third boom portion 33C. The bucket 35 is supported at the distal end side of the arm 34 through a support shaft 43 and a link mechanism 44 so as to be able to perform a scraping and discharging operation. The bucket 35 is interposed between the base end side of the arm 34 and the link mechanism 44. Mounted bucket cylinder 45
Rocking operation.

The boom cylinder 37, offset cylinder 40, arm cylinder 42 and bucket cylinder 4
Numerals 5 are each constituted by a hydraulic cylinder. The valve unit BU controls various hydraulic devices provided in the backhoe 1, and as shown in FIGS. 1 to 8, a plurality of control valves B1 to B12 each composed of a direct-acting spool type switching valve have a longitudinal shape. They are arranged in a direction perpendicular to the direction (the operation direction of the spool), connected and integrated. The valve unit BU includes a pair of brackets 25.
On the side opposite to the driver's seat 9 of the left and right wheels 25R, that is, on the right side of the right bracket 25R, the arrangement direction of the control valves B1 to B12 is aligned with the front of the swivel table 7 in the vertical direction. The oil supply / discharge port P is arranged so as to face right. Further, the lower part of the valve unit BU is housed below the upper surface (step upper surface, floor surface) of the swivel 7, and therefore, the upper part protrudes upward from the upper surface of the swivel 7.

Each control valve B1 of the valve unit BU
12 is described from the top, B1 is a bucket control valve for controlling the bucket cylinder 45, B2 is a boom control valve for controlling the boom cylinder 37,
3 is a right traveling control valve for controlling the hydraulic motor M1 of the right traveling device 4, B4 is a connection valve for connecting a delivery hose of the hydraulic pump 13, and B5 is a hydraulic motor M1 for the left traveling device 4. B6 is an arm control valve for controlling the arm cylinder 42, B7 is an SP control valve for controlling a hydraulic attachment mounted in place of the bucket 35, and B8 is an unloading control valve. B9 is a dozer control valve that controls a hydraulic cylinder that swings the dozer 6, B10 is an offset control valve that controls the offset cylinder 40, and B11 is a communication valve connected to the valve.
Is a turning control valve that controls the hydraulic motor M2 that turns the turning table 7, and B12 is a connection valve that connects the delivery hose of the hydraulic pump 13.

The spools S3, S5, S7, and S9 of the right traveling control valve B3, the left traveling control valve B5, the SP control valve B7, and the dozer control valve B9 are formed to protrude rearward, and are provided with links, cables, and the like. It is interlocked and connected to the operation means via the control unit. Also, a bucket control valve B1, a boom control valve B2, an arm control valve B6, an offset control valve B10, and a turning control valve B11.
Are operated by pilot pressure, and each control valve B1,
The hydraulic hoses constituting the pilot oil passages for operation of B2, B6, B10, and B11 are provided with left and right brackets 25L, 25L.
The control valve B1 for the bucket and the control valve B for the boom are disposed on the left side of the swivel 7 through the through hole 31 of R.
2. Control valve B6 for arm and control valve B for turning
The hydraulic hose from 11 is connected to a pilot valve provided in the cockpit 17 and an offset control valve B10
Is connected to a pilot valve provided on the floor of the swivel 7 on the right side of the control table 17.

The pilot valve provided on the control table 17 is operated by an operation lever 19 provided on the control table 17, and the pilot valve provided on the right side of the control table 17 is operated by a pedal. The valve unit BU is mounted and fixed to the outer surface of the right bracket 25R by a mounting member 46. The mounting member 46 is made of a plate material and includes an intermediate main plate 46A and upper and lower plates 46B and 46C welded and fixed to the upper and lower sides of the main plate 46A, and a bolt insertion hole 47 formed in the mounting member 46. The right bracket 25R is inserted into the right bracket 25R by a bolt screwed into a screw hole formed in the right bracket 25R.
It is attached and fixed. A pair of front and rear mounting holes 48 are formed in the upper and lower plates 46B and 46C.
The valve unit BU is mounted and fixed to the mounting member 46 by bolts and nuts through the holes.

The rear portion of the main plate 46A extends rearward of the valve unit BU, and right and left traveling control valves B3, B5, SP control valves B7, Dozer control valve B
9, a support bracket 49 for supporting the operation cables K1 to K4, the cables K1 to K4 and the control valves B
Spools S3, S5, S7, S of 3, B5, B7, B9
9 and an interlocking mechanism 50 for interlocking and linking the control mechanism 9 with the control unit 9.

This portion is located above the through hole 31 so as not to block the through hole 31 of the bracket 25R. The support bracket 49 is fixedly welded to a pair of upper and lower stays 51 welded and fixed to the rear end side of the main plate 46A in a leftward protruding manner, and is used for attaching and fixing one end side of the cables K1 to K4 to the front end side. Four U-shaped notches 52 are formed vertically. The cables K1 to K4 pass through the through holes 31 of the left and right brackets 25L and 25R, and
, The traveling control valves B3, B5
Are connected to a pair of left and right operation levers 19 of the control console 17, and the operation cables K 3, 4 of the SP control valve B 7 and the dozer control valve B 9 are connected to levers, It is linked to an operating means such as a pedal.

The interlocking mechanism 50 includes a cylindrical body 5 rotatably fitted around a vertical axis on a vertical support shaft 55 supported between a pair of upper and lower stays 54 welded and fixed to the main plate 46A.
A first link 57 protruding rearward and a second link 58 protruding outward are fixed to each cylindrical body 56. The first link 57 is pivotally connected to a joint 59 fixed to the ends of the cables K1 to K4, and the second link 58 is connected via the third link 60 to the spools S3, S5 of the control valves B3, B5, B7, B9. It is connected to S7 and S9.

Therefore, when one end of each of the cables K1 to K4 (inner cable) is pushed / pulled in the left / right direction, the spools S3, S5, S
7, S9 is operated to slide back and forth. An L-shaped tank bracket 53 that supports the upper portion of the hydraulic oil tank 14 is fixed to the upper stay 51.

As shown in FIGS. 7, 12, and 13, the connecting plate 26 is provided with a horizontally elongated first hose insertion hole 61 above the cylinder bracket 29.
A second vertically long hose insertion hole 62 is formed on the right side of the first hose. In the first hose insertion hole 61, a hydraulic hose 63 for supplying and returning hydraulic oil for operating the offset cylinder 40, the arm cylinder 42, and the bucket cylinder 45 is provided.
Right side bracket 2 from control valves B1, B5, B10
The hydraulic hose 63 is inserted through a through hole 31 of 5R, and is disposed on the back surface of the first boom part 33A via a hose insertion space provided at the base of the first boom part 33A.

In the second hose insertion hole 62, a hydraulic hose 64 for supplying and returning hydraulic oil for operating the boom cylinder 37 is connected to the right bracket 25R from the control valve B2.
Is inserted through the through hole 31. Above the first hose insertion hole 61, a hose clamp 65 is provided. This hose clamp 65 is
Holding member 67 formed with a hose insertion hole 66 for inserting
And a support member 68 for supporting the holding member 67 on the connecting plate 26, and a mounting member 69 for mounting the holding member 67 to the support member 68. The supporting member 68 is formed of a plate material, and is mounted on the upper surface of the connecting plate 26 by bolts on the upper side of the first hose insertion hole 61 in the direction of its inclination, and above the lower end of the mounting portion 68a. And a support portion 68b that rises to the side,
The length L1 of the support member 68 is formed longer than the length L2 of the first hose insertion hole 61.
This prevents and prevents mud from falling along the connecting plate 26 from above the connecting plate 26 from falling down from the first hose insertion hole 61.

The attachment member 69 is attached to the support portion 68b by bolts, and the holding member 67 is attached to the attachment member 69.
And the supporting member 68b. Further, the holding member 67 is divided into two by a division surface passing through the center of the hose insertion hole 66. The hydraulic hoses for supplying and returning the hydraulic oil for operating the hydraulic cylinder for swinging the motor M1 and the dozer 6 of the traveling device 4 are connected to the traveling control valve B.
3, B5, through the through holes 31 of the left and right brackets 25L, 25R, are connected to a swivel joint arranged on the left side of the swivel 7 and arranged at the center of rotation, and the motor M1 of the traveling device 4 and the dozer are connected from the swivel joint. Pressure oil is supplied to the hydraulic cylinder that swings 6 or returned to the swivel joint.

The hydraulic hoses for supplying and returning the hydraulic oil for operating the hydraulic motor M2 for turning are connected to the turning control valve B11 through the through holes 31 of the left and right brackets 25L and 25R. It is arranged on the left side and connected to the hydraulic motor M2. The hydraulic hoses for supplying and returning the hydraulic oil from the SP control valve B7 pass through the through holes 31 of the right bracket 25R, pass through the opening 70 provided at the rear of the connecting plate 26, and pass through the first boom portion 33A. And further disposed along the side surface of the arm 34 on the distal end side of the arm 34. The opening 70 is closed by a cover plate.

Other hydraulic hoses are also provided through the through holes 31 of the left and right brackets 25L, 25R. The hydraulic oil tank 14 is disposed behind the valve unit BU, and the engine 10 is disposed horizontally behind the swivel 7 and behind the driver's seat 9 (arranged so that the axis of the crankshaft faces in the left-right direction). The hydraulic pump 13 is mounted on the right side of the engine 10 via a pump housing 71. This hydraulic pump 13 is located behind the hydraulic oil tank 14, and therefore, the valve unit B
The hydraulic system including the U, the hydraulic oil tank 14 and the hydraulic pump 13 is centrally arranged on the right side of the swivel 7 to improve maintenance.

The lower ends of the hydraulic oil tank 14 and the engine 10 are fixedly mounted on a base member 21 of the swivel base 7 via a mounting member, and the upper portions thereof protrude upward from the upper surface of the swivel base 7. The upper part of the valve unit BU and the hydraulic oil tank 14 is covered by an openable / closable tank cover 72, and the right side of the engine 10, the valve unit BU, the hydraulic oil tank 14, and the upper part of the hydraulic pump 13 are fixed to the base member 21. The rear side of the engine 10 is covered by a bonnet right 73, and the rear side of the
4 is covered.

The tank cover 72 is formed so as to be inclined so as to move downward as it goes forward, and to be inclined so as to move downward as it goes outward in the left-right direction. This is a backhoe 1 of this type
In this case, the bucket 35 may be positioned above the tank cover 72 with the soil scooped, and the soil that has spilled from the backhoe 35 and has fallen on the tank cover 72 turns along the upper surface of the tank cover 72. It is intended to fall on the front side or the right side of the stand 7.

The hydraulic oil tank 14 is disposed at the center in the front-rear direction on the right side of the swivel 7 (in other words, at the position (or in the vicinity) substantially coincident with the pivot axis O in the front-rear direction, that is, in a side view. Thus, it is arranged at a high position on the rear side of the tank cover 72, whereby the height of the hydraulic oil tank 14 is sufficiently increased to secure a necessary and sufficient capacity.

In arranging the valve unit BU in front of the hydraulic oil tank 14, it is necessary to reduce the length of the valve unit BU in the vertical direction as much as possible in order to secure the function of the tank cover 72. However, in this embodiment, the one in which the discharge pressure of the hydraulic pump 13 is set higher and the pressure resistance of each control valve is set higher than that of the conventional one is adopted.
The vertical width of each control valve is reduced, so that the overall length of the valve unit BU in the vertical direction is reduced.

The hydraulic oil tank 14 is formed of a metal plate, and the inner side in the left-right direction of the front wall 14a is inclined so as to move rearward as it goes inward in the left-right direction. To avoid interference with the front wall 1
A block member 78 having a screw hole is fixed to the upper outer surface of the inclined portion 4a, and the tank bracket 53 is bolted to the block member 78. When the height of the hydraulic oil tank 14 is increased, there is a high possibility that the mounting portion on the lower end side of the hydraulic oil tank 14 is damaged by the action of inertia force during turning or the like, but the upper part of the hydraulic oil tank 14 is supported. By doing so, the mounting portion on the lower end side of the hydraulic oil tank 14 can be prevented from being damaged, and since the stay 51 for fixing the support bracket 49 is used, the structure is not complicated. Also, the tank bracket 53
The bolt insertion hole formed in the above is a fool hole, and is designed so that stress at the time of assembly due to variation at the time of manufacture does not occur.

As shown in FIGS. 6 and 9, an inlet pipe 75 is provided on the upper surface side of the hydraulic oil tank 14 for introducing return oil of pressure oil into the tank.
5 is connected to a return hose 76. The return hose 76 passes through above the tank bracket 53,
The tank bracket 53 and the right side bracket 25 </ b> R are disposed facing downward, and are connected to the return pipe 79.

The return pipe 79 is formed in an L shape by a vertical portion 79a and a horizontal portion 79b. The horizontal portion 79b is located above the through holes 31 of the left and right brackets 25L, 25R. The vertical portion 79a is piped so as to rise upward from the right end side of the horizontal portion 79b along the right bracket 25R so as to cross the 25R.

The vertical stay 79a is provided with a mounting stay 80.
Is fixed, and the mounting stay 80 is fixed to the right bracket 25R by bolts.
9 is attached. As described above, since the return pipe 79 is attached by being floated upward from the base member 21 of the swivel 7, interference with other members existing on the base member 21 can be avoided, and the return pipe 79 can be easily assembled. In addition, by previously fixing to the bracket 25R, the assembling is facilitated.

A return hose from the oil cooler 16 is connected to a connection port 81 on the left end side of the return pipe 79, and a return hose from each hydraulic device is connected to the connection port 82. A pressure oil outlet 83 is formed in the lower part of the rear wall of the hydraulic oil tank 14, and the outlet 83 and the suction port of the hydraulic pump 13 are connected by a suction hose 84. Since the hydraulic pump 13 is located immediately behind the hydraulic oil tank 14, the suction hose 84 can be formed short, the suction resistance can be reduced, and the cost can be reduced.

The hydraulic pump 13 is composed of three pumps for discharging hydraulic oil for operating hydraulic equipment and one pump for discharging hydraulic oil for a pilot. Delivery hoses 85, 86,
87 is disposed so as to pass through the middle part in the vertical direction on the right side of the hydraulic oil tank 14 and to reach the valve unit BU, and the delivery hose 88 for the pilot is also provided in the middle part in the vertical direction on the right side of the hydraulic oil tank 14. Hydraulic oil tank 1
4 connected to a switching valve mounted on the top,
A hose clamp 89 is provided on the left side of the swivel 7 from the switching valve through the through hole 31 and supports the hoses 85, 86, 87, 88 on the right side wall of the hydraulic oil tank 14.

As shown in FIGS. 10 and 11, the hose clamp 89 is formed of a plate material, and has a vertically central portion 90a opposed to each other with a space in the left-right direction. The holding member 90 includes a pair of left and right holding members 90 configured to be in close contact with each other, and a holding member 91 made of a rubber-like elastic body sandwiched between the central portions 90a of the holding members 90.

The left holding member 90 is fixed to the right side wall of the hydraulic oil tank 14 by welding, and a nut member 92 is fixed to the outer surface of the upper and lower ends 90b of the left holding member 90 by welding. Each of the hoses 85, 86,
Insertion holes 93, 94, 95, 96 for inserting 87, 88
Are formed in the up-down direction, and are divided into two right and left sides by a division plane passing through the center of each insertion hole 93. A groove 97 is formed on the outer periphery of the holding member 91 for preventing the holding member 90 from being immersed. The inner surface 97a of the groove 97 is expanded outward from the groove bottom so that welding can escape. It is inclined so that

With the hose clamp 89, the hoses 85, 8
To clamp 6,87,88, first, hose 8
5, 86, 87, and 88 are inserted into the respective insertion holes 93 of the holding member 91,
The holding member 91 is sandwiched between the left and right components of the holding member 91 so that the holding member 91 is inserted into the holding members 91, 95, and 96. Next, the hoses 85, 86, 87, and 88 are clamped by passing a bolt 98 through upper and lower ends 90 b of the left and right holding members 90 from outside in the left and right direction and screwing the bolt 98 to the nut member 92. . At this time, the head 98a of the bolt 98 fits (or may slightly come out) within the left and right widths of the left and right holding members 90.
The hoses 85, 86, 87, 88 can be satisfactorily clamped even when the width H of the hose clamp 89 becomes thinner and the distance between the right bonnet 73 and the hydraulic oil tank 14 is narrow.

The radiator 12 is disposed on the left side of the engine 10. The radiator 12 is disposed so as to protrude upward from the upper surface of the swivel 7, and an oil cooler 16 is mounted on the left side of the radiator 12. Have been. A fuel tank 11 for storing fuel of the engine 10 is disposed in front of the radiator 12 and the oil cooler 16, and a battery 15 is disposed in front of the fuel tank 11. Most of the fuel tank 11 is housed in the swivel 7 below the driver's seat 9, and the battery 15 is also housed in the swivel 7.
The livability around the driver's seat 9 is ensured.

A part of the fuel tank 11 is
On the left side of the turntable 7 is projected upward from the upper surface of the revolving base 7, and a refueling port 11A is provided in the protruding portion to facilitate refueling. The engine 10,
The upper, front and left sides of the radiator 12, the oil cooler 16 and the upwardly projecting portion of the fuel tank 11 are covered by a hood left 99 fixed to the swivel 7 and the hood left 99 is connected to the oil cooler 16. An air intake port having a large number of holes is formed in the facing portion, and is configured such that outside air is taken into the hood left 99 from left to right by a radiator fan 100 provided on the left side of the engine 10. I have.

In the above configuration, the engine 10 is disposed sideways behind the driver's seat 9 (the rear part of the swivel 7), and a hydraulic pump 13 is disposed on the right side of the engine 10.
, A hydraulic oil tank 14 is provided in front of the hydraulic pump 13, a valve unit BU is disposed vertically in front of the hydraulic oil tank 14, and a radiator 1 is provided on the left side of the engine 10.
2 and an oil cooler 16, a fuel tank 11 is provided in front of the radiator 12, and a battery 15 is provided in front of the fuel tank 11. These are arranged in a U-shape in plan view so as to surround the turning axis O. Therefore, even if the backhoe 1 is small, it can be compactly stored in an arc centered on the pivot axis O.

The hydraulic oil tank 14 is located on the right side of the swivel 7.
, And the fuel tank 11 is located on the left side of the swivel 7 and these are located at substantially the same position in the front-rear direction, so that the weight balance is good.

[0048]

According to the present invention, a turning work machine is provided with a driver's seat on one side in the left-right direction of the turntable and a valve unit in which a number of control valves for controlling hydraulic equipment are arranged in one direction. In the above, the valve unit is arranged at the front part on the other side in the left-right direction of the swivel base, so that the arrangement direction is the up-down direction, a hydraulic oil tank is arranged behind the valve unit, and the left-right direction at the rear part of the swivel base The engine is arranged sideways on the center side, a radiator is arranged on one side in the left and right direction of the engine, and a hydraulic pump is arranged on the other side in the left and right direction of the engine and on the rear side of the hydraulic oil tank,
By arranging a fuel tank in front of the radiator and arranging a battery in front of the fuel tank,
The valve unit is separated from the driver's seat, and heat and hydraulic noise from each control valve are less likely to be transmitted to the driver's seat, and the environment around the driver's seat is improved. In addition, since the hydraulic system including the hydraulic pump, the hydraulic oil tank, and the valve unit is centrally arranged on one side in the left-right direction of the swivel base, the maintenance performance thereof is good. In addition, since the valve unit is vertically oriented, it can be arranged compactly in the horizontal direction, and the maintenance of the valve unit is good. In addition, the engine is placed horizontally at the rear of the swivel, a hydraulic pump is placed on one side in the left and right direction of this engine, a radiator is placed on the other side, a hydraulic oil tank is placed before the hydraulic pump, and a valve is placed before the hydraulic oil tank. Since the units are arranged and the fuel tank is arranged in front of the radiator and the battery is arranged in front of the fuel tank, the main equipment on the swivel base is compactly arranged, which is suitable for a small turning work machine. In addition to the arrangement structure, the weight balance is good.

Also, a driver's seat is provided on one side in the left-right direction of the turntable, and a pair of left and right brackets for supporting the base of the boom are provided on the other side, and a large number of control valves for controlling hydraulic equipment are arranged in one direction. In a turning working machine provided with a valve unit comprising: a valve unit, the valve unit is disposed at a front portion on the side opposite to the driver's seat of the pair of brackets so that the arrangement direction is up and down; By arranging the hydraulic oil tank behind the valve unit and arranging the hydraulic pump behind this hydraulic oil tank, the environment around the driver's seat is improved and the maintenance work is facilitated by the centralized arrangement of the hydraulic system. In addition, since the valve unit is separated from the driver's seat by the bracket supporting the boom, the environment around the driver's seat is further improved. Further, even if the bracket includes a pair of left and right brackets that support the base of the boom on the side of the driver's seat, the valve unit can be compactly arranged in a narrow place on the side of the bracket opposite to the driver's seat. Can be stored. Further, even with a pair of left and right brackets that support the base of the boom on the side of the driver's seat, the main devices and the like on the swivel base can be arranged compactly and the weight balance is good.

[Brief description of the drawings]

FIG. 1 is a plan view showing an arrangement structure of devices on a swivel table.

FIG. 2 is an overall plan view of the backhoe.

FIG. 3 is an overall side view of the backhoe.

FIG. 4 is a side view of the swivel table as viewed from the right.

FIG. 5 is a right side view of the valve unit.

FIG. 6 is a plan view of a valve unit and a hydraulic oil tank.

FIG. 7 is a front view of the right side of the swivel.

FIG. 8 is a right side view of the support member of the valve unit.

FIG. 9 is a partial cross-sectional rear view of a hydraulic oil tank and a bracket.

FIG. 10 is a rear view of the hose clamp.

FIG. 11 is a sectional view taken along line AA of FIG. 10;

FIG. 12 is a side view of the boom mounting portion as viewed from the left.

FIG. 13 is a plan view of a hose clamp.

[Explanation of symbols]

 7 Turntable 9 Driver's seat 13 Hydraulic pump 14 Hydraulic oil tank BU Valve unit

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Yoshio Nasu 64 Ishizukita-cho, Sakai City, Osaka Prefecture Inside the Kubota Sakai Plant (72) Inventor Fumi Sato 64 Ishizukita-cho, Sakai City, Osaka Prefecture Kubota Sakai Manufacturing In-house (72) Inventor Takeshi Kajimoto 64 Ishizu-Kitacho, Sakai-shi, Osaka Inside Kubota Sakai Works

Claims (2)

[Claims] 1. A turning work machine comprising a driver unit provided on one side in a lateral direction of a swivel base and a valve unit having a large number of control valves for controlling hydraulic equipment arranged in one direction. At the front of the other side of the swivel,
The hydraulic oil tank is arranged on the rear side of the valve unit, and the engine is arranged sideways on the center of the rear of the swivel in the left and right direction. A radiator is disposed on the other side, a hydraulic pump is disposed on the other side in the left-right direction of the engine and behind the hydraulic oil tank, a fuel tank is disposed on a front side of the radiator, and a battery is disposed on a front side of the fuel tank. The turning work machine characterized by having arranged. 2. A turning table is provided with a driver's seat on one side in the left-right direction, a pair of left and right brackets supporting the base of the boom is provided on the other side, and a large number of control valves for controlling hydraulic equipment are arranged in one direction. In the turning work machine provided with the valve unit, the valve unit is disposed at a front portion of the pair of brackets on the side opposite to the driver's seat so that the arrangement direction is up and down. A hydraulic oil tank is placed behind the valve unit, the engine is placed sideways at the center in the left and right direction behind the swivel, and a radiator is placed on one side in the left and right direction of the engine. Side, and a hydraulic pump is arranged on the rear side of the hydraulic oil tank, and a fuel tank is arranged on the front side of the radiator,
A turning machine, wherein a battery is disposed in front of the fuel tank.