JP3315348B2 - Cooling structure inside the bonnet of a turning work machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art Conventionally, for example, as a small backhoe,
There is one described in JP-A-9-95976. In this backhoe, a swivel body is supported on a crawler traveling device so as to be rotatable around a vertical axis of rotation. The radiator is arranged so that one side faces each other, and an intake port (intake port) for taking cooling air into the radiator fan is formed by opening a lower surface of the turning body below the radiator.

For this reason, in the conventional backhoe, the outside air taken in from the intake can be immediately sent to the radiator fan without coming into contact with the high-temperature engine, and the cooling efficiency is improved.

[0004]

However, in the above-mentioned conventional backhoe, since the outside air taken in from the intake is immediately sent to the radiator fan, the cooling air may be actively supplied to the fuel tank and the battery. If these devices are placed near devices that are likely to become hot, such as hydraulic oil tanks, the radiant heat will cause the fuel tanks and batteries to percolate or shorten their life. is there.

On the other hand, in order to avoid such inconvenience, the fuel tank and the battery may be arranged as far away from the engine and the hydraulic oil tank as possible. Not suitable for backhoe. In other words, in such a small backhoe, since the laying area inside the hood is limited, there is a limit in arranging the fuel tank and the battery away from a device that is likely to be heated, such as an engine or a hydraulic oil tank, which is limited. If you try to force them apart, you have to design the hood itself larger.

In view of such circumstances, the present invention preferentially cools a fuel tank and a battery by cooling air taken into the bonnet, and thereby increases the durability of the fuel tank and the battery without increasing the size of the bonnet. The purpose is to improve. A second object of the present invention is to make it possible to use the cooling air that has cooled the fuel tank and the battery also for cooling the hydraulic oil tank so that the cooling air in the hood can be more effectively used. .

[0007]

In order to achieve the above object,
The present invention has taken the following technical measures. That is, according to the present invention, a swivel is provided on a traveling device so as to be rotatable around a vertical axis, and a fuel tank, a hydraulic oil tank, a radiator, a radiator fan, a battery, and a hood covering these are provided on the swivel. In the turning work machine provided with an intake port for taking in cooling air into the radiator fan and an exhaust port for discharging exhaust air from the radiator to the outside, the fuel tank and A battery or one of them is arranged facing the intake port, and the hydraulic oil tank is
It is located downstream of the tank and battery in the cooling air flow direction.
Is placed .

Therefore, according to the present invention, the cooling air introduced into the bonnet from the air inlet first comes into contact with the fuel tank and / or the battery, and these members have priority over the cooling air. Therefore, the fuel tank and the battery can be effectively cooled even if a member that easily becomes high in temperature, such as a hydraulic oil tank, is arranged close to the fuel tank.

[0011] According to the present invention, since the arrangement in the flow direction downstream side of the cooling air than the fuel tank and the battery of the hydraulic oil tank, hydraulic oil tank cooling air having cooled the fuel tank or battery Can also be used for cooling, and the cooling air in the hood can be used more effectively. Further, the present invention recommends that the battery be placed on top of the fuel tank, and that an inlet be provided in the side area of the bonnet facing both sides of the battery and the fuel tank.

In this case, the battery and the fuel tank can be concentrated in a narrower plane area, and the cooling air immediately after being taken into the hood from the intake port can be brought into contact with both the fuel tank and the battery. Thus, both of these members can be effectively cooled.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 8 show a small backhoe 1 exemplified as a turning work machine.
The backhoe 1 is composed of a traveling device 2, a revolving unit 3, and an excavating device 4.
It is mainly composed of

Hereinafter, the traveling direction of the backhoe 1 indicated by an arrow A in FIG. 2 is referred to as a front-rear direction, and the vehicle width direction indicated by an arrow B perpendicular to the front-rear direction is referred to as a left-right direction. As shown in FIGS. 2 and 8, the traveling device 2 employs a crawler traveling device having a pair of left and right crawler traveling members 5 having rubber crawler belts and driving these traveling members 5 by a traveling motor M. Have been. A dozer 6 is provided at a front portion of the traveling device 2.

The revolving unit 3 is provided with a revolving table 7 rotatably supported on a bearing 8 provided at a central portion between the left and right crawler traveling units 5 of the traveling device 2 so as to be rotatable about a vertical revolving axis. ing. The revolving base 7 is configured by covering a frame formed by combining a frame material having a front part and an intermediate part with a plate material with a cover member, and a rear part of the revolving base 7 is fixed to the frame and 7 is constituted by a counterweight 9 for balancing the weight with the excavator 4 and the like at the front.

The revolving base 7 is configured to be rotated about a revolving axis by a revolving motor supported by a frame of the revolving base 7. The backhoe 1 is of a type referred to as a so-called small backward turn. That is, in plan view, the revolving unit 3 has a rear surface side formed in an arc shape having a center substantially at the revolving axis in plan view, and a revolving locus circle drawn by the revolving unit rear surface when the revolving unit turns is formed by a left and right crawler traveling unit. 5 fits within the left-right width.

As shown in FIG. 2, the left and right side surfaces of the revolving unit 3 are formed on the front and rear surfaces of the revolving unit 3 with the revolving unit 3 facing forward. Is formed to be narrower than the diameter. Further, in the same state, the front surface of the revolving structure 3 is formed on a surface along the left-right direction,
The left side is projected more forward than the right side. 2 and 8
As shown in FIG. 2, a pair of upper and lower support members 10 for supporting the excavator 4 project from the right side of the front surface of the revolving unit 3. A swing bracket 11 is pivotally attached to the support member 10 via a support shaft so as to be able to swing left and right around a vertical axis. The swing bracket 11 is swingable left and right by a hydraulic cylinder (not shown). ing.

As shown in FIG. 8, the excavator 4 includes a boom 12 having a base pivotally attached to a swing bracket 11 so as to be swingable about the left and right axes. An arm 13 pivotally attached to the arm 13;
And a bucket 14 attached to the front end side so as to be free to squeeze and dump. The boom 12 includes the swing bracket 1
The arm 13 is swung by a boom cylinder 15 provided between the boom 12 and the middle part of the boom 12, and the arm 13 is swung by an arm cylinder 16 provided between the middle part of the boom 12 and the base of the arm 13. Activated bucket 14
Is squeezed and dumped by a bucket cylinder 17 provided between the base of the arm 13 and the mounting portion of the bucket 14.

The rear upper surface and the right upper surface of the swivel 7 are open, and these open portions are covered by a bonnet 18 projecting upward from the upper surface of the swivel 7. Inside the hood 18, an engine 19, a fuel tank 20 for the engine 19, a hydraulic oil tank 21 for various hydraulic devices, a radiator 22,
The battery 23 and the like are stored therein, and these are fixed to a frame or the like of the swivel 7.

The fuel tank 20 and the hydraulic oil tank 21 are arranged at the right front portion of the swivel 7 and are arranged side by side in the left-right direction. Behind the hydraulic oil tank 21, a radiator 22 has a core whose core faces in the left-right direction. Are arranged as follows. The engine 19 is disposed horizontally on the left side of the radiator 22 in the left-right direction, and the fan belt 46 is disposed on the right side of the engine 19.
A radiator fan 45 is provided, which is driven to rotate. The hydraulic pump 2 is located on the left side of the engine 19.
4 are provided.

As shown in FIGS. 2 and 3, the fuel tank 20, the hydraulic oil tank 21, the radiator 22,
The battery 23 and the radiator fan 45 are intensively arranged in a plane area covered by a right-side cover 25 described later, which constitutes a part of the divided hood 18. Therefore, the fuel tank 20, the hydraulic oil tank 21, the radiator 2
2 and the battery 23, the radiator fan 45, and the replacement of the fan belt 46 can be performed.

Further, as shown in FIG.
The fuel tank 20 arranged at the front right of the plane area covered by 5 is provided with a fuel supply port 20a at the rear of the upper surface, and the hydraulic oil tank 21 arranged at the front left side of the plane area is provided at the center of the upper surface. A radiator 22 provided with a fuel supply port 21a and disposed at the rear of the same plane area has a water supply port 22 at the front right side thereof.
a. The battery 23 has a water supply port 23a on the rear side of the upper surface.

On the other hand, as shown in FIG. 1 and FIG. 3, the fuel tank 20 is formed in a substantially L-shape in plan view with a left rear portion recessed. The hydraulic oil tank 21 having a substantially rectangular shape in a plan view is disposed. As shown in FIG. 7, a square recessed storage recess 20 b is formed on the upper front side of the fuel tank 20, and the battery 23 is stored in the storage recess 20 b in a state where the battery 23 is overlaid on the fuel tank 20. Have been.

The fuel tank 20 and the hydraulic oil tank 21
The arrangement relationship is not limited to the case of FIG. 2, and the left and right positions of the fuel tank 20 and the hydraulic oil tank 21 may be interchanged.
Further, the battery 23 can be stored in a storage recess formed in the upper part of the hydraulic oil tank 21. The bonnet 18 is made of resin or thin steel plate, and has a right-side cover 25 that covers the fuel tank 20, the hydraulic oil tank 21, the radiator 22, the battery 23, and the like, and a rear side that forms a rear part of the bonnet 18 and covers a rear part of the engine 19. A cover 26 and a left cover 27 that covers the engine 19 from the left side of the hood 18 to the right cover 25.

When the bonnet 18 is divided into three parts as described above, the dividing surface of the bonnet 18 (the joint portion of the bonnet structure) can be reduced as much as possible, and the deviation due to the manufacturing distortion between the parts is improved, and the part is rounded. It is easy to manufacture with a different design. The rear cover portion 26 of the respective cover portions that divide the bonnet 18 is supported by a support frame (not shown) erected at the rear of the swivel 7 so as to be rotatable up and down around the left and right axes via hinges. , This rear cover part 2
The engine 18 and its surroundings can be inspected by opening the upper part 6 (see FIG. 8).

On the other hand, the left cover 27 is fixed to the swivel 7 and is divided into two parts at the joint of the hydraulic pump 24.
The left divided portion is detachable. As shown in FIG. 1, the hood 18 including the cover portions 25, 26, and 27 has a first chamber 18A and a second chamber 1 inside.
8B, the engine 19, the fuel tank 20, and the operation chamber 18 are air-tightly mounted on the swivel 7 so as to form a first chamber 18A that occupies most of the right front to the rear of the swivel 7. An oil tank 21, a radiator 22, a battery 23, and a radiator fan 45 are arranged. On the other hand, the hydraulic pump 24 is disposed in the second chamber 18B occupying the left rear portion of the swivel 7.

As shown in FIG. 2, the right cover 25 is
The cover 25 includes a main body 25a that constitutes most of the cover 25, and an inspection cover 25b attached to the main body 25a so as to be openable and closable. Of these, the main body 25a is supported on the swivel 7 via a hinge (not shown) so as to be rotatable up and down around the left and right axes. The main body 25a has an oil supply port 20a for the fuel tank 20 and the hydraulic oil tank 21. , 21a and the water supply ports 22a, 23a of the radiator 22 and the battery 23 are formed, and the inspection cover 25b closes the opening 28.

The main body 25a of the right cover 25
May be detachably attached to the swivel 7 so that it can be completely removed from the swivel 7. As shown in FIG. 3, a groove 32 is formed on the front edge side, the rear edge side, and the left edge side of the opening 28, and the inspection cover 2 is formed on the periphery of the opening 28.
A seal member 33 (see FIG. 4) which is in contact with the lower surface of 5b is fitted.

On the other hand, on the lower surface of the left edge of the inspection cover 25b, there is provided an attachment portion 34 for attaching the rotating piece 29a of the hinge 29, and the fixing piece 2 of the hinge 29 is provided on the main body 25a.
9b is provided for attaching the inspection cover 2
5b is supported by a pair of front and rear hinges 29 so as to be rotatable around a front-rear axis and can be opened and closed. By simply opening the inspection cover 25b, it is possible to supply oil to the fuel tank 20 and the hydraulic oil tank 21 and supply water to the radiator 22 and the battery 23.

A striker 30 is provided on the right rear portion of the inspection cover 25b. A lock device 31 which is connected to the striker 30 to maintain the inspection cover 25b in a closed state is provided on the main body 25a side. 31
Can be released by an engine key or the like. FIG.
As shown in FIG.
The driver's seat 36 is arranged at the center in the left-right direction of the vehicle. Operation tables 37 and 38 are arranged on both left and right sides of the driver's seat 36, and operation levers 39 for turning operation of the turntable 7 and operating the arm are provided on the left operation table 37. Also,
The right operating console 38 is provided with operating levers 40 for boom operation and bucket operation. The driver's seat 36
A traveling lever 41 for operating the left and right traveling body 5 is provided in front of the vehicle.

As shown in FIGS. 1, 3, 5 and 6,
At the rear of the side surface of the right cover portion 25 of the bonnet 18, an exhaust port 42 composed of a number of long holes is formed to discharge cooling air sent from the radiator fan 23 and passing through the core of the radiator 22 to the outside. ing. A radiator 22 is provided between the exhaust port 42 and the radiator 22.
The air guide duct 43 protrudes from the upper and lower edges and the front and rear edges toward the periphery of the exhaust port 42 and guides the cooling air passing through the core of the radiator 22 to the exhaust port 42 without leakage. 43 is an upper and lower and front and rear guide wall 43
A, 43B, 43C and 43D.

On the other hand, as shown in FIGS. 1, 3 and 7,
On the front surface of the right cover portion 25 of the bonnet 18, an intake port 44 composed of a number of long holes is formed in order to take cooling air into the radiator fan 45. The fuel tank 20 located
The battery 23 is arranged so as to face the air inlet 44.

For this reason, as shown by the arrow in FIG. 1, the cooling air introduced into the hood 18 from the intake port 44 first comes into contact with the fuel tank 20 and the battery 23, and these members 20, 23 It is preferentially cooled by the cooling air. On the other hand, in the present embodiment, a higher temperature than the fuel tank 20 and the battery 23 is provided between the members 20 and 23 and the radiator fan 45, which are downstream of the fuel tank 20 and the battery 23 in the flow direction of the cooling air. A hydraulic oil tank 21 is provided.

Therefore, the fuel tank 20 and the battery 2
The cooling air that has come into contact with the cooling tank 3 further contacts the hydraulic oil tank 21 on the downstream side to cool the tank 21, and is then supplied to the radiator fan 45.
0, the battery 23 and the hydraulic oil tank 21 can be efficiently cooled in the bonnet 18. In addition,
The present invention is not limited to the above embodiment,
For example, in order to prevent dust and dust from adhering to the fuel tank 20 and the battery 23, the intake port 44 may be closed with a dustproof filter, or the intake port 44 may be made of a grid or punched metal plate.

The exhaust port 42 and the intake port 44 are
Instead of the hood 18 side, it can be formed on the swivel 7. Furthermore, in the above-described embodiment, both the fuel tank 20 and the battery 23 are arranged so as to face the air inlet 44, but only one of these members may be made to face the air inlet 44.

[0034]

As described above, according to the present invention,
The fuel tank and the battery can be effectively cooled even when a member that easily becomes high in temperature such as a hydraulic oil tank is arranged close to the fuel tank. Therefore, the durability of the fuel tank and the battery can be improved without increasing the size of the hood.

Further, according to the present invention, the cooling air that has cooled the fuel tank and the battery can be used for cooling the hydraulic oil tank, and the cooling air in the hood can be more effectively used.

[Brief description of the drawings]

FIG. 1 is a plan sectional view of a backhoe according to the present invention.

FIG. 2 is a plan view of a backhoe according to the present invention.

FIG. 3 is a plan view of the right side of the hood of the backhoe.

FIG. 4 is a rear cross-sectional view of the upper right part of the hood of the backhoe.

FIG. 5 is a right side view of the revolving superstructure of the backhoe.

FIG. 6 is a rear view of the right side of the hood of the backhoe.

FIG. 7 is a front view of the right side of the hood of the backhoe.

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

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 backhoe (turning machine) 2 traveling device 7 turning table 18 bonnet 20 fuel tank 21 hydraulic oil tank 22 radiator 23 battery 42 exhaust port 44 intake port 45 radiator fan

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-8-209743 (JP, A) JP-A-8-334024 (JP, A) JP-A 7-127096 (JP, A) 127027 (JP, U) JP-A 4-33757 (JP, U) JP-A 62-136607 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) E02F 9/00 F01P 11 / 10 F02B 65/00

Claims (3)

(57) [Claims] 1. A swivel (7) is provided on a traveling device (2) so as to be rotatable around a vertical axis, and a fuel tank (20) and a hydraulic oil tank (10) are provided on the swivel (7). 21), a radiator (22), a radiator fan (45), a battery (23), and a hood (18) covering them, and an intake port (44) for taking in cooling air into the radiator fan (45) and the radiator. In the turning work machine provided with an exhaust port (42) for discharging exhaust air from (22) to the outside on the bonnet (18) or the turning table (7), the fuel tank (20) and the battery (23) ) Or any one of them is arranged so as to face the intake port (44), and the hydraulic oil tank (21) is disposed between the fuel tank (20) and the fuel tank (20).
Downstream of the battery and the battery (23) in the cooling air flow direction.
A cooling structure inside a bonnet of a turning work machine, which is disposed . 2. A battery (23) comprising a fuel tank (2).
0), the battery (23)
And a bonne facing both sides of the fuel tank (20)
The inlet (44) is provided in the side area of the slot (18).
A cooling structure inside a bonnet in the turning work machine according to claim 1 . 3. The radiator fan (45) is a hydraulic oil tank.
To the radiator (22) arranged behind the
It is a blow-out type that sends cooling air,
Cooling air passing through the core of the radiator (22) is not leaked
An air guide duct (43) for guiding to the exhaust port (42) is provided.
The cooling structure inside the bonnet in the turning work machine according to claim 1 or 2 , wherein