JP3375540B2 - Backhoe cooling system - 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 device for a backhoe, and more particularly to a cooling device for supplying cool air in spots while keeping a state in which an excavation work device can be easily operated.

[0002]

2. Description of the Related Art As a spot cooler for a working machine, a combine cooler disclosed in Japanese Utility Model Laid-Open No. 6-50915 and a tractor disclosed in Japanese Patent Laid-Open No. 7-47832 are known. But there was no backhoe.

[0003]

Therefore, it has been considered to equip a backhoe with an air conditioner for the purpose of obtaining comfortable habitability and differentiation as a product. In the backhoe, it is important to arrange each device so that it does not interfere with the eyes of the operator because the bucket is excavated in the front, rear, upper, lower, left, and right directions. An object of the present invention is to provide a cooling device suitable for a backhoe, which enables efficient cooling without a cooler unit or the like interfering with a driver's line of sight during excavation work.

[0004]

The technical means of the present invention for solving the technical problem is an evaporator 17 and an expansion valve 1.
A cooler unit a including 9 is provided inside the roof 12 with respect to the operating unit 5, and an air outlet 13 for supplying the cool air generated in the cooler unit a toward the operating unit 5 is provided above the operating unit 5. The cooler condenser 15 is provided at the right rear of the operating unit 5 outside the engine room 6. Therefore, since the cooler unit a is arranged inside the roof 12 with respect to the operating unit 5, the blower outlet 13 for supplying the cool air toward the operating unit 5 and the cooler unit a are close to each other, and the cooling can be performed efficiently. The arrangement of the cooler unit a inside the roof 12 prevents the cooler unit a from hindering the eyes of the operator during excavation work.

Further, since the cooler condenser 15 is provided on the right rear of the operating section 5 outside the engine room 6,
The hot air of the engine E does not hinder the cooling of the refrigerant by the cooler condenser 15, and it becomes possible to perform cooling more efficiently from this point as well, and the cooler condenser 15 controls the operation in excavation work. It will not interfere with the eyes of the person. Further, according to the technical means of the present invention, the cooler unit a including the evaporator 17 and the expansion valve 19 is provided inside the roof 12 with respect to the operating unit 5, and cool air generated in the cooler unit a is directed to the operating unit 5. An outlet 13 for supplying is provided on the upper part of the operating unit 5,
A pillar 11 in which a condenser 15 for a cooler supports a roof 12.
It is located on the right side of.

Therefore, similarly to the above, the outlet 13 and the cooler unit a are brought into a state of being close to each other so that the cooling can be efficiently performed, and the cooler unit a does not hinder the eyes of the operator during excavation work. In addition, since the cooler condenser 15 is provided on the right side of the pillar 11 that supports the roof 12, the hot air from the engine E does not hinder the cooling of the refrigerant by the cooler condenser 15, so that the cooler condenser 15 is further improved. It becomes possible to cool efficiently. Moreover, the cooler condenser 15 does not interfere with the eyes of the operator during excavation work.

The technical means of the present invention is that the cooler receiver 16 is provided on the side of the cooler capacitor 15. Therefore, the supply / discharge hose 22 for moving the refrigerant, which circulates between the cooler unit a and the receiver 16 for the cooler, can be arranged easily and efficiently along the support column 11 along a short path, and moreover, the receiver 16 for the cooler and the refrigerant transfer device. The supply / discharge hose 22 does not interfere with the eyes of the operator during excavation work. Further, the technical means of the present invention is that the cooler receiver 16 is attached to the column 11 that supports the roof 12.

Therefore, the cooler receiver 16 is installed in the roof 1
Since it is attached to the column 11 that supports 2, the supply / discharge hose 22 for moving the refrigerant that circulates between the cooler unit a and the cooler receiver 16 and the like can be easily and efficiently arranged along the column 11 in a short path. In addition, the cooler receiver 16 or the supply / discharge hose 22 for moving the refrigerant does not interfere with the eyes of the operator during the excavation work.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. 1 to 3, a backhoe is shown, 1 is a crawler traveling device, 2 is an excavation work device, 3 is a swivel base, 4 is a canopy, 5 is a driving part, and 6 is a driving part (engine room). The driving unit 6 is a rear small turning type including three bonnets, a tank bonnet 7 on the right side of the driver's seat 10 and a bonnet 8 on the rear side and an auxiliary hood 9 on the diagonally left side. The small rear turning type is a structure in which the turning center X is set so that only the turning radius of the rear part of the turning base 3 is within the machine width (the width of the left and right crawlers).

The canopy 4 is composed of a pair of right and left columns 11 standing upright from a driving unit 6 and a roof 12 for mud and sun protection. The pillar 11 has a shape in which the upper part thereof is bent slightly forward, and is provided on the inner surface side of the roof 12,
A cooler unit a in a cooling device A, which will be described later, and an outlet 13 in a state in which cool air is blown downward are arranged. Next, the cooling device A will be described. As shown in FIGS. 4 to 7, the cooling device A includes an evaporator 17 and a blower 1.
8, a cooler unit a including an expansion valve 19 and the like, and a cooler electric fan type condenser (condenser) 15 including an electric fan, a compressor 14, a cooler receiver (receiver) 16 and the like. It is configured as a vapor compression type in which the cool air generated in the cooler unit a is supplied from the pair of outlets 13 toward the operating unit 5. The cooler unit a is arranged in the rear part of the inside of the roof 12 with a slight inclination toward the rear, and at the front part of the inside of the roof 12, a pair of outlets 1
3, the cool air generated in the cooler unit a is supplied from the pair of outlets 13 toward the operating unit 5.

Although the cooler receiver 16 is provided with a desiccant, a dryer may be provided between the cooler receiver 16 without the desiccant and the expansion valve 19. The compressor 14 is installed in the engine section 6 which is the engine room,
It is driven by the power from the engine E and compresses the gaseous refrigerant. The cooler electric fan type condenser 15 has an electric fan, and is configured to cool the refrigerant sent from the compressor 14 with the electric fan. In addition, a pair of supply and discharge hoses 22 for moving the refrigerant back and forth that circulate through the cooler unit a, the electric fan type condenser 15 for cooler, the receiver 16 for cooler, etc. penetrate the upper surface of the bonnet 8,
The lower hole 11a formed on the lower side surface of the right support 11 passes through the inside of the right support 11, and is taken out from the upper hole 11b formed on the inner side surface of the upper part of the right support 11 and connected to the cooler unit a.

As shown in FIGS. 4 and 5, the cooler unit a arranged on the roof 12 comprises a pair of left and right outlets 13, a bifurcated cool air duct 25, an evaporator 17, and a pair of left and right blowers 18 in this order. It is arranged from front to back with,
A space between the start end of the cool air duct 25 and the blower 18 is covered with a cover 26 that surrounds the evaporator 17. A heat insulating material (insulator) 27 such as expanded polystyrene is stretched on the inner surface of the roof 12, and a roof cover 28 that covers the heat insulating material 27 and the cooler unit a is provided as an interior material.

At the rear end portion of the roof cover 28, a pair of left and right filters 29 for introducing outside air are laid sideways, and the outside air taken in through the roof cover 28 is sucked into the pair of blowers 18. Of. Then, the air blown by the blower 18 is cooled by the evaporator 17 to become cold air, and the air blows through the cold air duct 25 to the operating unit 5 from the air outlet 13. The cold air duct 25 has a shape branching into a left cool air passage 25a communicating with the left outlet 13 and a right cool air passage 25b communicating with the right outlet 13, and these left and right cool air passages 25a, 25b are provided on the roof 12. It is arranged close to the lateral edge along the left and right edges.

In the space surrounded by the roof cover 28 and the heat insulating material 27, the cover of the evaporator 17 and the cool air duct to the outlet 13 are formed so that the cool air duct 25, the cover 26, or both of them. You may take the structure which omits. As shown in FIG. 4, the evaporator 17 and the blower 18, which are integrated by the cover 26, are arranged in a rearward and downward inclined state in which the rear part is low, and the moisture generated by the temperature decrease in the evaporator 17 part drops. When it falls on the cover 26,
The drain 26a is provided on the right rear portion of the cover 26 so as to gather together. A drain hose 30 is connected to the drain 26a, and the drain hose 30 is connected to the hole 11 of the right support 11.
It is routed through the inside of the right support 11 via the inside of the swivel base 3 and is discharged from there to the outside of the machine.

The shape of the roof cover 28 is such that the left and right outlets 1
The left and right parts of the three parts and the left and right parts of the pair of left and right duct parts 25a, 25b in the cold air duct 25 are set to be lifted upward, that is, the ceiling is set to a high state in that part, which is used for slope excavation. When working at a high position of the bucket, the operator sitting on the driver's seat 10 can easily see the upper front. Then, as shown by phantom lines in FIG. 5, between the left and right of the left and right cool air passages 25a, 25b,
If the window 32A that allows the driver 12 to view the roof 12 above is provided, the bucket 2a that has been lifted high can be seen through the roof 12 and is easy to control, which is preferable. The roof 12 is attached and supported by a roof frame 24 formed over the left and right columns 11 with bolts or the like.

As shown in FIG. 2, FIG. 3, FIG. 8 and FIG. 9, the cooler condenser 15 is located outside the engine room 6 and on the right side of the pillar 11 that supports the roof 12, that is, the operating section 5. Is provided on the tank cover 7 on the right rear of the.
A bracket 31 is provided on the tank cover 7 via an anti-vibration rubber 32 and the like, and a bracket 35 such as a bolt and nut is attached to the bracket 31 via an L-shaped mounting piece 33 and a U-shaped mounting piece 34 for a cooler. The support case 36 of the capacitor 15 is placed and fixed. The mounting piece 33 is fixed to the bracket 31, and the mounting piece 34 is fixed to the support case 36.

A U-shaped fixing piece 37 is provided under the right support 11.
Is externally fitted and fixed, and an L-shaped mounting piece 38 is attached to the fixing piece 37.
The upper end of the support case 36 of the cooler condenser 15 is fixed via the above. As shown in FIGS. 8 and 9,
The cooler condenser 15 has the support case 36 and the electric fan 48 as described above, and further has the condenser cover 49 located in front of the electric fan 48. A cooler receiver 16 is provided on the side of the cooler condenser 15. The cooler receiver 16 is fastened and fixed by a pair of upper and lower metal bands 51,
Each band 51 is fixed to a mounting member 52 protruding from the support case 36 or the cooler capacitor 15 main body.
The protective cover 5 covers the outer circumference of the cooler receiver 16.
3 is provided.

Therefore, there is no possibility that the cooler condenser 15 and the cooler receiver 16 impede the visual field of the operator sitting on the driver's seat 10. FIG. 10 and FIG. 11 show another embodiment, in which the cooler receiver 16 is replaced with the side of the cooler condenser 15 to support the roof 12.
It is designed to be attached to. That is, the right support 11
, A U-shaped mounting member 39 is welded to the rear surface of the mounting member 39, and a pair of upper and lower bands 41 made of metal or the like are provided on the rear surface side of the mounting member 39 via a mounting plate 40. Is secured and fixed, and a protective cover 42 is provided so as to cover the outer periphery of the cooler receiver 16. The protective cover 42 is fixed by a fastener 43 such as a bolt to the fixing piece 44 protruding from the right support 11 and the mounting member. It is fastened and fixed to 39.

Cooler unit a and cooler receiver 16
A pair of return and supply refrigerant hoses 22 for moving the refrigerant, which circulate between the compressor 14 and the like, penetrate the upper surface of the bonnet 8,
It is arranged along the right support 11, passes through the inside of the protective cover 42 of the cooler receiver 16, and is connected to the cooler unit a side inside the roof 12. The other points are the same as those in the above-described embodiment.

[0020]

According to the present invention, the air outlet 13 for supplying the cool air to the operating part 5 and the cooler unit a are in a state of being close to each other, and the cooling can be efficiently performed. Cooler unit a
Does not interfere with the operator's eyes during excavation work. Further, the hot air of the engine E does not hinder the cooling of the refrigerant by the cooler condenser 15, and the cooler condenser 15 does not hinder the eyes of the operator during excavation work. Further, the cooler receiver 16 prevents the cooler unit a from interfering with the eyes of the operator during excavation work.

[Brief description of drawings]

FIG. 1 is a side view of a backhoe.

FIG. 2 is a plan view of a backhoe.

FIG. 3 is a rear view of the backhoe.

FIG. 4 is a vertical sectional side view showing the structure of a canopy portion.

FIG. 5 is a plan view showing an arrangement structure of a cooling device in a canopy.

FIG. 6 is a sectional view of a duct portion.

FIG. 7 is a system diagram showing a structure of a cooling device.

FIG. 8 is a rear view of the lower portion of the canopy.

FIG. 9 is a plan sectional view of a condenser portion for a cooler.

FIG. 10 is a right side view of the backhoe.

11 is a cross-sectional view taken along the line AA of FIG.

[Explanation of symbols]

5 Driving department 6 Driving department (engine room) 11 props 12 roof 13 Outlet 15 Electric fan type condenser for cooler 16 Cooler receiver (receiver) 17 Evaporator 19 Expansion valve a Cooler unit

Claims (3)

(57) [Claims] 1. A left side above an engine room (6),
A canopy (4) is provided, and the canopy (4) is
A pair of left and right stanchions standing up from the engine room (6)
Roof provided between (11) and the upper end of the pillar (11)
(12) with a roof (12) of the canopy (4)
Is located at the upper part of the driving section (5) and is a pair of left and right columns.
(11) is the left behind the driver's seat (10) of the driver's department (5)
The cooler unit (a) arranged on both right sides and provided with the evaporator (17) and the expansion valve (19) is provided inside the roof (12) with respect to the operating part (5), and is generated in the cooler unit (a). A blower outlet (13) for supplying cold air to the operating unit (5) is provided at the upper part of the operating unit (5), and a compressor is provided.
(14) is driven by the power from the engine (E)
Of the backhoe installed in the engine room (6)
In the cooling device, the cooler condenser (15) is replaced by the engine room (6).
It is installed on the right side of the right column (11) above, and it moves the refrigerant.
The supply / discharge hose (22) for the engine is connected to the compressor (14).
Arranged along the right column (11) through the room (6)
A backhoe cooling system characterized by being used. 2. The backhoe cooling device according to claim 1 , wherein a cooler receiver (16) is provided on a side of the cooler condenser (15). 3. The cooler receiver (16) comprises a roof (1).
2. A backhoe cooling device according to claim 1 , characterized in that it is mounted on a column (11) supporting 2).