JP2001311179A - Revolving working machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate inspection or the like of a delivery pipe line extending from a hydraulic pump to a control valve in a back hoe. SOLUTION: A revolving base turnably supported around the vertical axis is installed on a traveling body and an engine 13 is arranged at the rear part of the revolving base and a control valve 17 controlling various hydraulic implements is disposed at one right or left side of the revolving base and a hydraulic pump 15 is disposed at the side of the engine 13 in the other side of the revolving base. A delivery pipe line extending from the hydraulic pump 15 to the control valve 17 is constituted of a metallic tube 59 crossing the arrangement space of the engine 13, a hydraulic hose 57 connecting one end of the metallic tube 59 and the hydraulic pump 15, and a hydraulic hose 58 connecting the other end of the metallic tube 59 and the control valve 17.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a turning machine such as a backhoe.

[0002]

2. Description of the Related Art In a backhoe, a swivel is supported on a lower traveling body so as to be swivelable about a vertical axis, and an excavator is supported at a front side of the swivel. An engine, a radiator, a hydraulic pump and the like are arranged behind the swivel. In this backhoe, the excavator is usually arranged rightward from the center in the left-right direction of the swivel base, and for this reason, the driver's seat is arranged above the swivel base and usually leftward from the center part in the left-right direction.

Further, the engine is arranged horizontally (so that the axial direction of the crankshaft coincides with the left-right direction), the radiator is arranged on one side, and the hydraulic pump is arranged on the other side.

[0004]

In the prior art, a radiator is arranged on the side of the engine. However, when the radiator is arranged on the driver's seat side (that is, on the left side), the radiator may become an obstacle. Because the driver's seat cannot be located too far behind and the space in front of the driver's seat is narrowed, it is conceivable that the radiator is placed on the opposite side of the driver's seat in the left-right direction, that is, on the right side of the engine. I have. When the radiator is arranged on the right side of the engine, the hydraulic pump is arranged on the left side of the engine. However, since the hydraulic pump is smaller than the radiator, the driver's seat can be arranged on the rear side as much as possible.

[0005] Further, the control valve for controlling various hydraulic devices such as a hydraulic cylinder and a hydraulic motor provided in the backhoe becomes relatively high in temperature and causes noise. Located on the right side. Therefore, the delivery pipeline from the hydraulic pump to the control valve is provided across the engine arrangement space. If substantially the entire delivery pipe is constituted by a hydraulic hose, the structure on the lower side of the engine arrangement space is complicated and the engine and the like are arranged, so that maintenance of the hydraulic hose is difficult. (Especially when replacing the hydraulic hose, it is almost impossible).

In view of the above problems, the present invention provides a delivery line from a hydraulic pump to a control valve even if a hydraulic pump is provided on one side of the swivel and a control valve is provided on the other side. It is an object of the present invention to provide a turning work machine with good maintainability.

[0007]

The technical means taken by the present invention to solve the technical problem is to provide a swivel table which is supported on a traveling body so as to be rotatable around a vertical axis. An engine is arranged at the rear of the swivel, control valves for controlling various hydraulic devices are arranged on one side of the swivel, and hydraulic pumps are arranged on the left and right sides of the engine on the other side of the swivel. The delivery pipeline from the control valve to the control valve is divided into a metal pipe that crosses the engine arrangement space, a hydraulic hose that connects one end of the metal pipe to the hydraulic pump, and a hydraulic hose that connects the other end of the metal pipe to the control valve. It is characterized by comprising.

Also, a driver's seat is arranged in front of the hydraulic pump, a radiator is arranged on the engine side opposite to the hydraulic pump, and a hydraulic oil tank and a control valve are arranged in front of the radiator. Features.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 denotes a small-sized backhoe referred to as an ultra-small turning type exemplified as a turning work machine. The backhoe 1 has a body (upper turning body) 2 that can turn around a turning axis in a vertical direction. It is mainly composed of a lower traveling body 3 and an excavator 4, and is configured so that the rear surface of the aircraft 2 does not protrude from the left and right widths of the lower traveling body 3 even when the aircraft 2 turns, and the excavator 4 is As shown in FIG. 1, the projection of the excavator 4 onto the fuselage 2 (the swivel base 11) is substantially contained within the outer shape of the fuselage 2 in a plan view when it is set up and folded. is there.

The lower traveling body 3 rotatably supports an idler 6, a driving wheel 7, and a plurality of rolling wheels 8 on side frames provided on both left and right sides of a track frame 5, and also supports the idler 6, the driving wheel 7 The crawler belt 9 is mainly wound around the wheel 8 and the rolling wheel 8. The driving wheel 7 is rotationally driven by a hydraulic motor or the like, thereby causing the crawler belt 9 to circulate and run in the front-rear direction (see FIG. 1). A crawler-type traveling device capable of traveling in the left-right direction is employed.
A dozer 10 which is moved up and down by a hydraulic cylinder is provided at a front portion of the lower traveling body 3.

As shown in FIG. 2, the body 2 includes a swivel 11 supported on the lower traveling body 3, a driver seat 12 provided on the swivel 11, an engine 13, a radiator 14,
Hydraulic pump 15, hydraulic oil tank 16, control valve 17, battery 18, canopy (shading device) 2
1, a fuel tank and the like. The swivel base 11 has a notched circular shape with a front part cut out in a plan view, and a bracket, a stay, and the like for mounting various devices made of a plate material or the like are welded on a base substrate 19 constituting a bottom part. A turning frame 20 shown in FIG. 8 configured by fixing is provided.

The base substrate 19 of the revolving frame 20
Has a notched circular shape in which a front portion in a plan view is cut out, is formed of a thick plate material, and is provided on a track frame 5 of the lower traveling body 3 via a turning bearing 22 in an up-down direction. It is supported so as to be rotatable around (substantially the center of the base substrate 19). A weight attachment 23 is fixed to the rear portion of the base substrate 19.
In addition, a counterweight 24 (protector) for adjusting the weight balance with the excavator 4 and the like arranged and supported at the front of the swivel 11 and constituting the rear of the swivel 11 is attached and fixed.

A pair of left and right support brackets 25L, 25R made of a plate material or the like and arranged to face each other in the left-right direction are located closer to one side (right side) from the left and right central portions on the base substrate 19.
Are fixed by welding or the like, and between the left and right support brackets 25L and 25R is an excavating device mounting portion 26 to which the excavating device 4 is attached. In addition, the turning frame 20
The right and left side surfaces from the counter weight 24 to the front side, the front surface from the left and right side surfaces to the left and right support brackets 25L and 25R, and the right side of the left support bracket 25L and the upper surface on the front side of the revolving base 11 are appropriately covered by a cover body. The inside of the swivel table 11 is a space for disposing devices and the like.

The excavator 4 is of an offset type,
A boom 29 whose base is pivotally attached to the excavator attachment portion 26 and is vertically swingable (swingable back and forth);
An offset boom 30 whose base is pivotally attached to the distal end of the offset boom 9 so as to be able to swing left and right, an arm attachment body 31 whose base is pivotally attached to the distal end of the offset boom 30 and which is swingable left and right. An arm 32 whose base is pivotally attached to the distal end of the arm attachment body 31 so as to be swingable up and down (i.e., swingable back and forth) is connected to the distal end of the arm 32 via a link mechanism 40. And a bucket 33 having one end pivotally attached to the tip end of the boom 29 and the other end pivotally attached to the side surface of the arm attachment body 31 and being parallel to the offset boom 30. And an offset link 34 forming a link.

A boom cylinder 35 is interposed between the excavator attachment section 26 and the distal end of the boom 29, and an offset is provided between the distal end of the boom 29 and a longitudinally intermediate portion of the offset boom 30. A cylinder 36 is interposed, an arm cylinder 37 is interposed between the arm attachment body 31 and the base side of the arm 32, and a bucket cylinder 38 is interposed between the base side of the arm 32 and the bucket 33. I have. These boom cylinder 35 and offset cylinder 3
6. The arm cylinder 37 and the bucket cylinder 38 are constituted by hydraulic cylinders.

Then, the boom 29 swings by the expansion and contraction operation of the boom cylinder 35 (the movement of the cylinder rod), and the offset boom 30 and the offset link 34 swing by the expansion and contraction operation of the offset cylinder 36. The arm attachment body 31, the arm 32, the bucket 33, and the like move in parallel to the left and right. Further, the arm 32 swings by the expansion and contraction operation of the arm cylinder 37, and the bucket 33 performs the scraping and discharging operation by the expansion and contraction operation of the bucket cylinder 38. As shown in FIG. 2 to FIG. 9, the engine 13 is horizontally disposed at the rear of the turning frame 20, a hydraulic pump 15 is mounted on the left side of the engine 13, and a radiator 14 is mounted on the right side of the engine 13.
Is disposed in front of the radiator 14, a hydraulic oil tank 16 for storing hydraulic oil is disposed, a control valve 17 is disposed in front of a lower portion of the hydraulic oil tank 16, and an upper front of the radiator 14 (of the control valve 17). Above) a battery 18 is arranged.

The driver's seat 12 is disposed on the left side of the swivel table 11 and in front of the hydraulic pump 15. Further, a fuel tank for storing fuel for the engine 13 is provided on the left side of the revolving frame 20 so as to be substantially accommodated in the revolving base 11. The right support bracket 25R is formed in the front-rear direction, and a rear end portion is connected to a weight mounting body 23, and the radiator 14, the hydraulic oil tank 16,
The control valve 17 and the battery 18 are disposed on the right side of the right support bracket 25R.

The rear end of the left support bracket 25L is spaced apart from the weight mounting member 23 in the front-rear direction so that the engine 13 can be arranged. A partition wall 41 extends leftward from the left side, and the partition wall 41 is erected on the base substrate 19 and partitions an arrangement space for the engine 13, the hydraulic pump 15, and the like in the swivel base 11. . On the base substrate 19, the weight mounting body 2 extends rearward from the middle of the partition wall 41 in the left-right direction.
A vertical rib (reinforcing member) 43 connected and fixed to 3 is provided upright.

A pair of left and right mounting plates 42L and 42R are provided at the front and rear of the portion of the turning frame 20 where the engine 13 is disposed. The left and right mounting plates 42L and 42R are arranged at an interval above the base substrate 19, and are fixed to a support member on the base substrate 19 by welding or the like. A mounting member 44 provided on the engine 13 is mounted and fixed to each of the mounting plates 42L and 42R via an anti-vibration rubber or the like. As shown in FIGS. 3, 6, and 7, a pair of front and rear support bases 45 is provided at a portion of the turning frame 20 where the hydraulic oil tank 16 is disposed.

The support base 45 is formed of a vertical wall portion 45A standing on the base substrate 19 and an upper wall portion 45B extending in the front-rear direction from the upper end of the vertical wall portion 45A. And the upper wall 45 of the support base 45
B, the mounting member 4 fixed to the lower surface of the hydraulic oil tank 16
6 is fixed by bolts or the like,
The hydraulic oil tank 16 is provided in a state of floating above the base substrate 19 (at a distance from the base substrate 19), and a space is formed between the base substrate 19 and the lower surface of the hydraulic oil tank 16. ing.

The rear right side of the hydraulic oil tank 16 projects rearward in order to increase the capacity while avoiding interference with the radiator 14 (in other words, the hydraulic oil tank 1).
6 is recessed at the rear left), and a hydraulic oil discharge port 54 is provided at the lower left side of the protruding portion (see FIG. 4). As shown in FIG. 6, an L-shaped bracket 61 is fixed to the upper front side of the hydraulic oil tank 16 by welding or the like, and the battery 18 is mounted on a mounting plate 71 fixed on the bracket 61. It is mounted and fixed via mounting hardware and the like.

The mounting plate 71 is also supported by a bracket fixed to the right support bracket 25R. As shown in FIGS. 3, 4, 6, 8, and 9, a pair of right and left mounting members 47 are welded back and forth on the base substrate 19 at the position where the control valve 17 of the revolving frame 20 is disposed. The control valve 17 is mounted and fixed on a mounting plate 48 fixed to the mounting member 47. The control valve 17 has a large number of direct-acting spool-type switching valves (flow control valves) B1 to B9 having a block-shaped valve body arranged in one direction perpendicular to the sliding direction (axial direction) of the spool. Are connected to each other to form a substantially rectangular parallelepiped shape as a whole.

The left and right widths of the control valve 17 are larger than the upper and lower widths, and the front and rear lengths are larger than the left and right widths. The control valve 17
Are horizontally arranged such that the arrangement direction of the switching valves B1 to B9 coincides with the front-rear direction (including the case where the switching valves B1 to B9 are slightly inclined left and right and / or up and down) and the sliding direction of the spool substantially coincides with the left-right direction. And is stored in the swivel 11.
The control valve 17 is arranged in order from the front.
An outlet 49, a switching valve B1 for controlling the boom cylinder 35, a switching valve B2 for controlling the offset cylinder 36, a switching valve B3 for controlling the arm cylinder 37, and a switching valve B for controlling the bucket cylinder 38.
4. A switching valve B5 for controlling a hydraulic motor for rotating the swivel table 11, a switching valve B6 for controlling a hydraulic motor for driving the right crawler belt 9, and a switching for controlling a hydraulic motor for driving the left crawler belt 9. Valve B
7, a switching valve B8 for controlling a separately mounted hydraulic attachment, a switching valve B9 for controlling a hydraulic cylinder for vertically moving the dozer 10, and an inlet section 50.

The inlet 50 is provided with a supply port 51 for pressure oil which is directed outward in the left-right direction. 3 to 5
As shown in the figure, a suction port 52 for hydraulic oil is provided on the lower side of the hydraulic pump 15, and a discharge port 53 for hydraulic oil (hydraulic oil) is provided on the upper side. One end of a suction hose 55 is connected to the suction port 52 of the hydraulic pump 15,
The other end of the suction hose 55 is connected to the discharge port 54 of the hydraulic oil tank 16, and the hydraulic oil in the hydraulic oil tank 16 is sucked into the hydraulic pump 15 through the suction hose 55.

The suction hose 55 is disposed so as to traverse the lower front part of the space in which the engine 13 is disposed in the left-right direction and to penetrate the left and right support brackets 25L, 25R and the vertical rib 43. Also, the suction hose 55 is
It is cut off in the middle and connected by a connecting pipe. In addition, the said suction hose 55 may be comprised by a metal tube. Also, the hydraulic pump 15
May be constituted by a hydraulic hose and a metal pipe.

The delivery line from the discharge port 53 of the hydraulic pump 15 to the supply port 51 of the control valve 17 has a metal pipe 59 (steel pipe) at an intermediate portion and hydraulic hoses 57 and 58 on both sides. ing. The metal tube 59 traverses the arrangement space of the engine 13 in the left-right direction, penetrates the left and right support brackets 25L, 25R and the vertical rib 43, and attaches the front mounting plates 42L, 42.
Piped through the lower side of R. Further, the left end side of the metal pipe 59 is located at a lower front part of the hydraulic pump 15,
It is directed outward in the left-right direction.

The right side of the metal pipe 59 is laid through the lower space of the hydraulic oil tank 16 after penetrating the right support bracket 25R. And is directed in an inclined direction that shifts upward as going forward. The one hydraulic hose 57 is connected to the left end of the metal pipe 59 and the discharge port 53 of the hydraulic pump 15, and the other hydraulic hose 58 is connected to the right end of the metal pipe 59 and the supply port 51 of the control valve 17. Have been.

The hydraulic pump 1 is connected via the delivery line.
5 is supplied to the control valve 17. In addition, an inspection hole 60 is formed on the base substrate 19 below the hydraulic pump 15 (below one hydraulic hose 57) so as to be opened and closed by an opening / closing lid. The engine 13, the radiator 14,
Hydraulic pump 15, hydraulic oil tank 16, control valve 17, battery 18, etc.
It is covered by a bonnet 27 disposed above the swivel table 11.

The bonnet 27 is shown in FIGS.
And the engine 13 and the radiator 1 as shown in FIG.
4. The swivel 1 in the arrangement space for the hydraulic pump 15 and the like, above the swivel 11 and behind the hood 62 mainly covering the rear, and the arrangement space for the engine 13 and the hydraulic pump 15 and the like.
The bonnet left 63 covering the upper side, the left side, and the front side above 1 and the arrangement space of the radiator 14, the hydraulic oil tank 16, the battery 18, the control valve 17, and the like.
It is mainly composed of a bonnet right 64 above the revolving base 11 and on the left and right sides and in front, and covering the upper side.

The right side of the bonnet left 63 and the rear left side of the bonnet right 64 communicate with each other. The front end side of the upper wall of the bonnet 62 is supported by a bonnet frame erected on the revolving frame 20 so as to be rotatable around an axis in the left-right direction. Have been. The bonnet left 63 is fixed to the hood frame, the turning frame 20 and the like.

The bonnet right 64 closes the main body 68 fixed to the right support bracket 25R, the bonnet frame, the revolving frame 20 and the like, and the front and rear openings 66, 67 formed on the upper surface of the main body 68. And a lid 69. Also, this bonnet right 64
The height is gradually reduced toward the front, and the right side is formed to be lower than the left side. The opening 66 on the front side of the bonnet right 64 is opened so as to open the upper part of the hydraulic oil tank 16, the battery 18, the control valve 17 and the like as shown in FIGS. 2, 6, 8 and 9. Have been.

The opening 66 is formed so as to reach the side surface of the main body 68 of the bonnet right 64 in order to facilitate inspection of the equipment such as the control valve 17 at the bottom of the arrangement space. Have been. Therefore, by opening the lid 69, the hydraulic oil tank 16, the battery 18, and the control valve 17 can be easily inspected and maintained. In particular, since the battery 18 is located above the storage space in the bonnet right 64, it is possible to easily check the liquid level of the battery 18, replenish the battery liquid, and replace the battery 18.

By opening the lid 69, the right hydraulic hose 58 can be inspected (replaced). The control valve 1 is located in front of the hydraulic oil tank 16.
7 is arranged such that the stacking direction of the valves B1 to B9 coincides with the front-rear direction, so that the space above the control valve 17 in the bonnet right 64 is empty, and the battery 18 is arranged in this empty space. In the small backhoe 1 of the ultra-small turning type, the space can be effectively used.

A storage box or the like can be provided in a space above the control valve 17 and in front of the battery 18. In this case, the storage box is provided detachably. Although the battery 18 is to be arranged as close as possible to the engine 13 (starter), the small backhoe 1 has no space. If the radiator 14 is placed in front or side of the radiator 14, inspection and maintenance cannot be easily performed. In addition, if it is arranged on the driver's seat 12 side, gas or the like becomes a problem.

The rear opening 67 is provided with the radiator 1.
4 is formed at a position corresponding to a radiator cap (supply port for cooling water) 70 provided on the upper part of
Is opened, inspection of the radiator 14 and supply of cooling water can be performed.

[0036]

According to the present invention, a swivel is provided on a traveling body, which is rotatably supported around a vertical axis, and an engine is disposed at the rear of the swivel. A control valve for controlling various hydraulic devices is placed in the engine, and a hydraulic pump is placed on the left and right sides of the swivel on the other side of the engine. Tubes and
A hydraulic hose connecting one end of the metal tube and the hydraulic pump,
Since it is provided with the hydraulic hose connecting the other end of the metal pipe and the control valve, the maintenance of the delivery pipe is improved.

In addition, a driver's seat is arranged in front of the hydraulic pump and a radiator is arranged on the side of the engine opposite to the hydraulic pump, so that the driver's seat is moved rearward to make a large space in front of the driver's seat. By arranging the hydraulic oil tank and control valve in front of the radiator, the hydraulic oil tank and control valve, which are a heat source, can be kept away from the driver's seat. Can be kept away from.

[Brief description of the drawings]

FIG. 1 is an overall side view of a backhoe.

FIG. 2 is a plan view of the airframe.

FIG. 3 is a plan view of the revolving frame.

FIG. 4 is a plan view showing a pipeline and the like from a hydraulic pump to a control valve.

FIG. 5 is a left side view of the engine and the hydraulic pump.

FIG. 6 is a right side view of the airframe.

FIG. 7 is a right side view of a delivery line of the hydraulic pump.

FIG. 8 is a left side view of the airframe.

FIG. 9 is a plan view of the right side of the hood.

[Explanation of symbols]

 3 Undercarriage 11 Turning Table 12 Driver's Seat 13 Engine 14 Radiator 15 Hydraulic Pump 16 Hydraulic Oil Tank 17 Control Valve 57 Hydraulic Hose 58 Hydraulic Hose 59 Metal Tube

Continued on the front page (72) Inventor Satoshi Kotani 64, Ishizukita-machi, Sakai City, Osaka Prefecture Inside Kubota Sakai Works, Ltd. (Reference) 2D015 BA01 CA00

Claims (2)

[Claims] 1. A turning table supported on a traveling body so as to be pivotable about a vertical axis, an engine is arranged at the rear of the turning table, and various hydraulic devices are controlled on one side of the turning table. A hydraulic pump is placed on the left and right sides of the swivel, on the other side of the engine, and the delivery line from the hydraulic pump to the control valve is
A swivel characterized by comprising a metal pipe crossing the engine arrangement space, a hydraulic hose connecting one end of the metal pipe to the hydraulic pump, and a hydraulic hose connecting the other end of the metal pipe to the control valve. Work machine. 2. A driver's seat is arranged in front of the hydraulic pump,
The turning work machine according to claim 1, wherein a radiator is disposed on a side of the engine opposite to the hydraulic pump, and a hydraulic oil tank and a control valve are disposed on a front side of the radiator.