JP2000094932A - Working vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the roof of a canopy with a cooler unit without deteriorating the field of view by constituting a strut for supporting the roof of the canopy from one member, and mounting and supporting a cooler unit on the inside of the roof through support frames protruded from the strut to both lateral sides thereof. SOLUTION: A canopy 4 is formed of one strut 11 stood from a prime motor part 6 and a roof 12, and a lateral pair of support frames fixed to the strut 11 and protruded from the strut 11 to both sides of a cooler unit (a) is provided on the upper end side of the strut 11. The cooler unit (a) is arranged on the inside of the roof 12, and a pair of cold air blowout parts 13 is arranged in the inside front part of the roof 12 to supply cold air to a driving part 5. Since the cooler unit (a) is arranged on the inside of the roof 12 and mounted on and supported by the strut frames protruded from the strut 11 to both lateral sides of the cooler unit (a), the field of view of a driver is never deteriorated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work vehicle, such as a backhoe, a combiner or a tractor, provided with a cooler unit on a roof of a canopy, and mainly provided with a spot cooler for supplying a driver with cold air in a spot manner. Work vehicle.

[0002]

2. Description of the Related Art For example, some backhoes have a canopy (shading).
The roof located above the driver is supported by a pair of right and left columns arranged on the left and right sides on the rear side of the driver.

[0003]

By the way, for a backhoe equipped with a canopy, a cooler unit is provided on the roof to provide a comfortable spot to the driver for reasons such as obtaining comfortable livability and differentiating the product. It is considered to blow cold air. However, if the roof is equipped with a cooler unit having a heavy object such as an evaporator or a blower, the support of the canopy must be strengthened in order to support the cooler unit. There is a problem of getting bad.

[0004] In view of the above problems, an object of the present invention is to provide a work vehicle in which a cooler unit can be mounted on a roof of a canopy without reducing visibility.

[0005]

A technical means of the present invention for solving this technical problem is to provide a working vehicle equipped with a canopy 4 in which a support column 11 for supporting a roof 12 of the canopy 4 is composed of one support column. The cooler unit a is disposed inside the roof 12, and the cooler unit a is mounted and supported on a support frame 71 projecting from the support column 11 to both left and right sides of the cooler unit a.

Further, conduits 73, 74, 75 for flowing the refrigerant.
And electric wires 76 for the cooler unit are housed in the support 11. Also, the cooler receiver 16
Is mounted on and supported by the support 11.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 10 show a first embodiment. In the backhoe (working vehicle) shown in FIGS. 1 to 3, 1 is a crawler traveling device, 2 is a digging work device, 3 is a swivel table, 4 is a canopy, 5 is an operation part, 6 is a driving part (engine room). The driving unit 6 includes a tank bonnet 7 on the right side of the driver's seat 10 and a rear bonnet 8.
It is configured as a small backward turning type provided with three bonnets, and an auxiliary machine bonnet 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 at the rear of the turning table 3 is within the machine width (the left and right crawler widths).

[0008] The canopy 4 is composed of a single column 11 rising from the prime mover 6 and a roof 12 for mud and sunshades. The strut 11 is formed of a hollow material (pipe material), and is disposed at the rear side of the driver's seat 10 and substantially at the center in the left-right direction of the driver's seat 10 in rear view. The mounting plate 70 is fixed by welding or the like, and the mounting plate 70 is mounted on the revolving base 3 and is mounted and fixed to a mounting portion of a reinforcing frame provided in the driving unit 6 with bolts or the like.

On the inner surface side (lower surface side) of the roof 12, a cooler unit a in a cooling device A, which will be described later, and a cool air blowing portion 13 in which cool air blows downward are arranged. The cool air blowing section 13 is constituted by a grill whose blow direction can be changed. At the upper end of the column 11, FIG.
As shown in FIG. 2, a pair of left and right support frames 71 fixed to the support 11 by welding or the like and projecting from the support 11 to both right and left sides of the cooler unit a are provided.
The support frame 71 is formed so as to extend outward in the left-right direction from both left and right sides of the support column 11, and then extend forward along a side portion on the inner surface side of the roof 12.

The left and right support frames 71 may be formed integrally, that is, by bending a single long frame material into a U-shape. Next, the cooling device A
Will be described. As shown in FIG. 7, the cooling device A
Evaporator (evaporator) 17, blower 18, expansion valve 19
And a cooler unit a having an electric fan and a condenser (condenser) 15, a compressor (compressor) 14, a receiver (liquid receiver) 16 for a cooler, and the like. It is of a vapor compression type that supplies cool air generated in the unit a from the pair of cool air blowout sections 13 to the operation section 5.

As shown in FIG. 5, the cooler unit a is disposed inside the roof 12 so as to be inclined slightly downward and rearward, and a pair of cool air blowing portions 13 is provided at the front inside the roof 12.
Are arranged so that the cool air generated in the cooler unit a is blown out from the pair of cool air blowout portions 13 toward the operating portion 5 (driver) and supplied. Although the cooler receiver 16 is provided with a desiccant, a configuration in which a dryer is provided between the cooler receiver 16 without a desiccant and the expansion valve 19 may be used.

The compressor 14 is provided in the driving unit 6 which is an engine room, is driven by the power of the engine E, and compresses a gaseous refrigerant. The cooler electric fan type condenser 15 has an electric fan, and is configured to blow and cool the refrigerant sent from the compressor 14 by the electric fan. The vertically long cooler receiver 16 is the support 1
1 and is arranged along the column 11.

As shown in FIG. 4 and FIG.
The cooler unit a disposed on the left and right includes a pair of left and right cold air blowing portions 13, a bifurcated cold air duct 25, an evaporator 17,
A pair of left and right blowers 18 are arranged in this order from front to rear, and the start end side of the cool air duct 25 and the blower 18
Between the cover 2 and the cover 2 surrounding the evaporator 17.
Covered with 6. A heat insulating material (insulator) such as styrofoam is stretched on the inner surface of the roof 12, and a roof cover 28 that covers the heat insulating material and the cooler unit a.
Is provided as an interior material, and the cooler unit a is housed in a space surrounded by the roof 12 and the roof cover 28.

At the rear end of the roof cover 28, there is provided an air intake section 20 for introducing outside air into a space surrounded by the roof 12 and the roof cover 28 and taking air into the blower 18. . The air intake section 20 is constituted by a filter 29 attached to an opening 21 formed at the bottom of the roof cover 28 from below so as to cover the opening 21. The filter 29 has air permeability and A filter retainer 23 detachably fixed to the roof cover 28 with a set screw 24 prevents the filter from being pulled downward.

The outside air taken in through the filter 29 is sucked into the pair of blowers 18 through the interior of the roof cover 28, and the blown air from the blowers 18 is cooled by the evaporator 17 to become cool air, and passes through the cool air duct 25. The cold air blow-out part 13 blows out to the driving part 5. The cool air duct 25 is branched into a left cool air passage 25a communicating with the left cool air outlet 13 and a right cool air passage 25b communicating with the right cool air outlet 13. 25b is roof 1
2 are arranged close to the lateral end so as to be along the left and right ends.

In the space surrounded by the roof cover 28 and the heat insulating material, the cover of the evaporator 17 and the cool air
A structure may be adopted in which a cool air duct for guiding cool air is formed, and the cool air duct 25 or the cover 26 or both of them are omitted. The evaporator 17 and the blower 18 integrated by the cover 26 are arranged in a rearwardly inclined state in which the rear portion is lowered, and water generated by a temperature drop at the evaporator 17 becomes a drop and the cover 2 is formed.
When it falls on 6, it is configured to gather at the bottom inside the cover 26. The cover 26 has a pair of left and right drain pipes 26.
a and 26b are provided on both front and rear sides, and each drain pipe 26a and 26b has a drain pipe 72 made of a rubber pipe or the like.
The drain tube 72 is inserted and housed inside the support post 11, as shown in FIGS. 1 and 8.
While being arranged downward through the inside of the support 11,
It is disposed on the swivel 3 via the driving unit 6 so as to reach the lower surface side.

Normally, the rear drain pipe 26a
From the drain pipe 26b on the front side when the body is tilted forward. The shape of the roof cover 28 is between the left and right of the left and right outlets 13 and the pair of left and right duct portions 2 in the cold air duct 25.
5a, 25b between the left and right so as to lift up,
That is, the ceiling is set high in that part, so that when the bucket 2a is operated at a high position, such as when digging a slope, the operator seated on the driver's seat 10 can easily look upward and forward.

If a window is provided between the left and right cold air passages 25a and 25b so that the driver 5 can view the upper part of the roof 12 from above, the bucket 2a, which has been lifted high, can be lifted.
It is preferable because it can be seen through and easy to maneuver. As shown in FIGS. 4 to 6, the left and right support frames 71 are arranged on the left and right outer sides of the evaporator 17 and the blower 18 located at the center in the front and rear direction of the roof 12, and the roof 12 and the cooler unit a supporting portion 48 for supporting a. This support 48
The mounting member 49 is formed of a plate material and fixed on the support frame 71 by welding or the like, and is formed in a U-shape that is open upward in a side view and protrudes inward in the left-right direction on the bottom surface of the mounting member 49. The evaporator 17 and the blower 18 are arranged between the pair of fixed front and rear brackets 50 and the like.

A cooler frame 52 is mounted on the bracket 50, and a cooler unit a is mounted on the cooler frame 52. The cooler unit a is mounted and supported on a support frame 71 via the cooler frame 52. . The cooler frame 52 is formed so as to surround a pair of left and right side frame portions 52A located on the left and right sides of the evaporator 17 and the blower 18 and the left and right sides and the front of the cool air duct 25, and the left and right side frame portions 52a.
And a rear frame portion 52C formed so as to surround the left and right sides and the rear of the blower 18 and to connect rear portions of the left and right side frame portions 52a.
And an intermediate frame portion 52D that is disposed to cross over the evaporator 17 and the blower 18 and connects the middle portions of the left and right side frame portions 52a to each other, and is disposed substantially at the center of the rear portion of the roof 12 in the left-right direction. Further, it is composed of a connecting frame portion 52E for connecting the rear frame portion 52C and the intermediate frame portion 52D.

The cooler unit a includes a stay 53 fixed to the left and right sides of an intermediate frame 52D, a stay 54 fixed to the front left and right sides of a front frame 52B with respect to the cooler frame 52, and a left and right blower. 18 provided between the connecting member 55 for connecting the connecting member 18 and the connecting frame portion 52E.
Mounted and supported by. Also, a pair of front and rear stays 5 is provided on the left and right outer surfaces of the left and right side frame portions 52A.
The left and right stays 57 are mounted on the bracket 50 of the support portion 48 and are fixed to the bracket 50 from above by bolts and nuts. Thus, the cooler unit a is mounted and supported on the support portion 48 via the cooler frame 52.

As described above, the cooler unit a is attached to the cooler frame 52, and the cooler frame 52 is attached to the support portion 48. Therefore, the cooler unit a is attached to the cooler frame 52 on the ground. The mounting of the cooler frame 52 to the support portion 48 can be easily performed since the stay 57 is mounted on the bracket 50.

At the center in the front-rear direction on both the left and right sides of the inner surface of the roof 2, a mounting portion mounted on the mounting member 49 of the support portion 48 from above and mounted and fixed from below by bolts 59. 58 are provided. A pair of left and right stays 60 and 61 are provided on the front frame portion 52B and the rear frame portion 52C, respectively, and the roof cover 28 is bolted to the stays 60 and 61 from below.
The side wall portions of the roof cover 28 are fixed to the left and right sides of the front frame portion 52B and the rear frame portion 52C by bolts from outside in the left-right direction, whereby the roof cover 28 is mounted and supported on the cooler frame 52.

At the edge of the roof cover 28, a sealing material 62 is provided over the entire periphery of the roof 12 in contact with the inner surface of the roof 12.
2 and the roof cover 28 are sealed. As shown in FIGS. 3, 9 and 10, a support frame 33 having a bottom wall 31 and an upright wall 32 is provided at the right front end of the swivel base 3. Is mounted in an upright state, and is removably fixed to a mounting member 34 projecting upward from the support frame 33 by a fastener 35 such as a bolt. The protective cover 36 covers the front, side and upper portions of the capacitor 15. Is provided. The condenser 15 and the protective cover 36 are arranged in front of the right front end of the driving unit 6, that is, in front of the tank bonnet 7 on the right side of the driver's seat 10. That is, it is stored at a position lower than the upper surface of the tank hood 7 on the right side of the driver's seat 10. Therefore, the capacitor 15 and the protective cover 36 are
There is no danger of obstructing the view of the pilot sitting on the boat.

Also, as shown in FIG.
A U-shaped mounting member 39 is fixed by welding or the like, and a pair of upper and lower metal bands 41 is provided on the rear surface side of the mounting member 39 via a mounting plate 40. The protective cover 42 is provided so as to cover the outer periphery of the cooler receiver 16. The protective cover 42 is fixed to the support column 11 by a fixing tool 43 such as a bolt. 39 is fixed.

Refrigerant distribution conduits 73, 74, 75 arranged between the roof 12 and the driving unit 6, that is, a conduit 73 composed of a rubber tube for allowing the refrigerant to flow from the evaporator 17 to the compressor 14, and a condenser 15 to the receiver 16
A conduit 74 composed of a rubber tube for flowing the refrigerant to the evaporator 17 and a conduit 75 composed of a rubber tube for flowing the refrigerant from the receiver 16 to the evaporator 17 are disposed along the column 11 and housed in the column 11. I have.

Further, electric wires 76 (a bundle of electric wires) for electric equipment such as a blower 18, a switch, and a lamp of the cooler unit a are also housed in the column 11. In the above configuration, the cooler unit a may be directly attached and fixed to a stay or a bracket fixed to the support frame 71 without providing the cooler frame 52. Further, the front side and the rear side of the cooler frame 52 may be attached and fixed to the support frame 71.

Also, the drain pipe 72 and the conduits 73, 74, 7
5. The electric wirings 76 may be inserted from the lower part of the support 11 to the outside of the driving part 6 after one end thereof is taken out. FIG. 11 shows a second embodiment, in which the front ends of left and right support frames 71 are connected and integrated by a left and right connection frame member 71 arranged so as to cross the front of the cooler unit a. In other words, one long frame material is bent to form a C-shape in plan view).

Other structures are substantially the same as those of the above-described embodiment. FIG. 12 shows a third embodiment, in which a support 11 is formed in an open U-shape on the side in rear view.
The vertical portion of the column 11 is shown offset from the driver's seat 10 to the left or right. Other configurations are substantially the same as those of the above embodiment.

FIGS. 13 to 15 show a fourth embodiment, in which refrigerant flow conduits 73, 74, 75, electric wirings 76, and drain pipes are arranged between the roof 12 and the driving unit 6. FIG. The conduits 73, 74, 75, the electrical wirings 76, and the drain pipe 72 are disposed inside the protective cover 42, while the conduits 72 are disposed along the outside of the column 11. The conduits 73, 74, 75, the electrical wirings 76, and the drain tube 72 are supported by the support 11 via the protective cover 42 or another clamp member.

[0030]

According to the present invention, the roof 1 of the canopy 4 is provided.
And a cooler unit a is arranged inside the roof 12, and the cooler unit a is mounted on a support frame 71 projecting from the support 11 to the left and right sides of the cooler unit a. By mounting and supporting the cooler unit a on the roof 12 of the canopy 4
The effect that the visibility of the driver is not deteriorated even if the vehicle is mounted.

Further, conduits 73, 74, 75 for flowing the refrigerant.
By storing the electric wires 76 for the cooler unit in the column 11, the conduits 73, 74, 75 and the electric wires 76 are not exposed to the outside, so that they can be protected and the appearance is preferable. . Further, by mounting and supporting the cooler receiver 16 on the column 11, the receiver 16 can be mounted and fixed outside without obstructing the driver's eyes.

[Brief description of the drawings]

FIG. 1 is a rear view of a backhoe.

FIG. 2 is a side view of the backhoe.

FIG. 3 is a plan view of a backhoe.

FIG. 4 is a plan view of the inside of the roof.

FIG. 5 is a side sectional view of the inside of the roof.

FIG. 6 is a side view of a central portion of the cooler frame.

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

FIG. 8 is a sectional view taken along line BB of FIG. 1;

FIG. 9 is a side view of a right front portion of the backhoe.

FIG. 10 is a perspective view of a right front portion of the backhoe.

FIG. 11 is a plan view showing the inside of a roof according to the second embodiment.

FIG. 12 is a rear view of the backhoe according to the third embodiment.

FIG. 13 is a rear view of the backhoe according to the fourth embodiment.

FIG. 14 is a side view of the receiver.

FIG. 15 is a plan sectional view of a receiver mounting portion.

[Explanation of symbols]

 4 Canopy 11 Support 12 Roof 16 Receiver 71 Support frame 73 Conduit 74 Conduit 75 Conduit 76 Wiring a Cooler unit

Claims (3)

[Claims] A work vehicle provided with a canopy (4), comprising a support (1) for supporting a roof (12) of the canopy (4).
The cooler unit (a) is disposed inside the roof (12), and the cooler unit (a) is placed on the left and right sides of the cooler unit (a) from the support (11). A working vehicle characterized by being mounted and supported on a projecting support frame (71). 2. A refrigerant flow conduit (73), (74),
2. The work vehicle according to claim 1, wherein the electric wires for the cooler unit and the electric wires for the cooler unit are housed in the column. 3. The cooler receiver (16) is mounted on a support (1).
The work vehicle according to claim 1, wherein the work vehicle is mounted and supported in 1).