JP3339827B2 - Work vehicle - Google Patents

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 having a cooler unit provided on a roof thereof, and mainly to a work having a spot cooler for supplying cold air to a driver in a spot manner. About the car.

[0002]

2. Description of the Related Art A spot cooler for a working vehicle is disclosed in Japanese Utility Model Laid-Open Publication No. 6-50915 in which a cooler unit is provided on a roof of a canopy (shade).

[0003]

In the prior art, a support frame is provided protruding forward from a pair of right and left columns, and a relatively heavy cooler unit or roof is attached to the support frame. Therefore, there is a problem that an excessive load acts on the support column due to the body vibrating up and down. Further, for this reason, there is a problem that if the pillars are made thicker in order to increase the strength of the pillars, visibility becomes worse by that amount.

SUMMARY OF THE INVENTION [0004] In view of the above problems, an object of the present invention is to reduce the load acting on a column by mounting the evaporator and roof of the cooler unit on the column in a well-balanced manner.

[0005]

A technical means of the present invention for solving this technical problem is that a cooler is arranged on a roof 12 which is arranged above a driving unit 5 and supported by a pair of right and left columns 11. in work vehicle provided with a unit a, Lou
The support part 48 is arranged on the left and right sides of the hook 12 at the center in the front-rear direction.
Then, the upper end of the column 11 is fixed to the lower surface of the support portion 48.
And the support portion 48 has front and left sides of the roof 12 on both sides.
Attach the center in the rear direction.
Cooler unit a arranged at the center in the front-rear direction of
Evaporator 17 and blow air to the evaporator 17
It is characterized in that the blowers 18 are arranged and these are attached to the support portion 48.

Further, before and after one side of the Le-safe 12, provided the cool air blowout portion 13 for blowing cold air from the evaporator 17,
An air intake section 20 for introducing air into the blower 18 may be provided on the other side.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. In the backhoe (working vehicle) shown in FIGS. 7 to 9, 1 is a crawler traveling device, 2 is a digging work device, 3 is a swivel, 4 is a canopy, 5 is a driving unit,
Reference numeral 6 denotes a driving unit (engine room). The driving unit 6 is configured as a small rear turning type including three bonnets: a tank bonnet 7 on the right side of the driver's seat 10, a rear bonnet 8, and an auxiliary machine bonnet 9 on the 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).

The canopy 4 is composed of a pair of right and left columns 11 standing up from the prime mover 6 and a roof 12 for mud and sunshades. The support 11 has a shape in which the upper portion is bent slightly forward, and a cooler unit a in a cooling device A, which will be described later,
A cool air blowing unit 13 in which cool air blows downward is arranged. The cool air blow-out section 13 is constituted by a grill whose direction of blowing cool air can be changed. Next, the cooling device A will be described.

As shown in FIG. 10, a cooling apparatus A includes a cooler unit a having an evaporator (evaporator) 17, a blower 18, an expansion valve 19, and the like, and an electric fan type condenser for a cooler having an electric fan. (Condenser) 1
5, a compressor (compressor) 14, a cooler receiver (liquid receiver) 16 and the like, and a vapor compression type in which cool air generated in the cooler unit a is supplied from the pair of cool air blowout units 13 to the operating unit 5. Things are configured. As shown in FIG. 4, the cooler unit a is arranged so as to be slightly inclined downward and rearward inside the roof 12, and a pair of cool air blowing portions 13 are arranged at the front inside the roof 12, and the cooler unit a is generated by the cooler unit a. It is configured such that cool air is blown out from a pair of cool air blowout portions 13 toward the operation 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.

[0010] The compressor 14 is provided in the driving section 6 which is an engine room, is driven by power from 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 disposed obliquely rearward of the right support 11 along the support 11. As shown in FIG. 1, the cooler unit a arranged on the roof 12 includes a pair of left and right cold air blowing portions 13, a forked cold air duct 25, an evaporator 17, and a pair of left and right blowers 1.
8 are arranged in this order from the front to the rear, and the space between the start end of the cool air duct 25 and the blower 18 is covered with a cover 26 surrounding the evaporator 17.
Further, a heat insulating material (insulator) such as styrene foam is provided 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. It 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 passes through the interior of the roof cover 28 and is sucked into the pair of blowers 18, 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 in the cover 26. The cover 26 has a pair of left and right drain pipes 26a,
26b are provided on both front and rear sides, and each drain pipe 2
A drain hose is connected to 6a and 26b, and this drain hose is arranged below along the right support 11. In addition, normally, the water is drained from the rear drain pipe 26a. However, when the backhoe is inclined forward, the water is drained from the front drain pipe 26b.

The shape of the roof cover 28 is such that it rises upward between the left and right portions of the left and right outlets 13 and between the left and right portions of the pair of left and right duct portions 25a and 25b in the cold air duct 25, that is, at that portion, the ceiling Is set to a high state, so that the operator seated on the driver's seat 10 can easily look forward and upward when working at a position where the bucket 2a is high, such as for slope excavation. In addition, between the left and right of the left and right cold air passages 25a and 25b,
If a window that allows the upper side to be visually recognized is provided, the bucket 2a that has been lifted high can be seen through the roof 12, which makes steering easier, which is preferable.

As shown in FIGS. 1 to 6, a support portion 48 for supporting the roof 12 and the cooler unit a is provided at the upper end of each of the right and left columns 11. This support 48
Is a mounting member 49 formed from a plate material and fixed to the upper end of the column 11 by welding or the like, and is formed in a U-shape that is open upward in a side view and fixed to the bottom surface of the mounting member 49 so as to protrude inward in the left-right direction. Pair of front and rear brackets 50 and support 1
Reinforcing member 51 fixed over 1 and mounting member 49
And so on. Between the left and right support parts 48,
Evaporator 1 located at the center in the front-rear direction of roof 12
7 and a blower 18 are arranged.

A cooler frame 52 is mounted on the bracket 50, and a cooler unit a is mounted on the cooler frame 52. Cooler frame 52
Are 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 side of the cold air duct 25, and are connected to the front portions of the left and right side frame portions 52a. A front frame portion 52B for connecting
A rear frame 52C is formed so as to surround the left and right sides and the rear of the blower 18 and connects the rear portions of the left and right side frames 52a, and is disposed so as to cross over the evaporator 17 and the blower 18; Left and right side frame portions 52a
Frame part 52D connecting the middle parts of the
The rear frame 5 is disposed substantially at the center of the rear in the left-right direction.
It is composed of a connecting frame portion 52E for connecting the 2C and the intermediate frame portion 52D.

The cooler unit a has 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 left and right sides on the inner surface side (lower surface side) of the roof 2, a mounting member 49 of the support portion 48 is mounted from above and mounted and fixed from below by bolts 59. A part 58 is provided.

A pair of left and right stays 60, 61 are provided on the front frame portion 52B and the rear frame portion 52C, respectively, and the roof cover 28 is fixed to the stays 60, 61 from below by bolts. 52B and rear frame 52
The side walls of the roof cover 28 are fixed to the left and right sides of C by bolts from the outside in the left and right direction, whereby the roof cover 28 is mounted and supported on the cooler frame 52. A seal member 62 is provided over the entire periphery of the edge of the roof cover 28 so as to be in contact with the inner surface side of the roof 12. The seal member or the like seals the space between the roof 12 and the roof cover 28. Have been.

As shown in FIGS. 8, 13 and 14, 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. The capacitor 15 is placed 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, and protected so as to cover the front, side and top of the capacitor 15. A cover 36 is provided.
The condenser 15 and the protective cover 36 are disposed 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 bonnet 7 on the right side of the driver's seat 10. Therefore, there is no possibility that the condenser 15 and the protective cover 36 obstruct the view of the driver sitting on the driver's seat 10.

As shown in FIGS. 11 and 12, a U-shaped mounting member 39 is welded to the right support 11, and a pair of upper and lower members is mounted on the rear surface side of the mounting member 39 via a mounting plate 40. A band 41 made of metal or the like is provided, and the cooler receiver 16 is fastened and fixed by the band 41, and a protective cover 4 is provided so as to cover the outer periphery of the cooler receiver 16.
2, the protective cover 42 is provided with a fastener 4 such as a bolt.
By 3, it is fastened and fixed to the fixing piece 44 protruding from the right support 11 and the mounting member 39. A pair of back and forth refrigerant supply / discharge hoses 22 for circulating through the cooler unit a, the cooler receiver 16, the compressor 14, and the like.
The electric wiring and the drain hose for the cooler unit a penetrate the upper surface of the hood 8 and are arranged along the right support column 11, pass through the inside of the protective cover 42 of the cooler receiver 16, and are located on the cooler unit a side inside the roof 12. It is connected to the.

FIG. 15 shows a modification of the above-described embodiment.
Is constituted by a grill provided directly on the cool air discharge section of the cooler unit a. In this modification, the cool air blowout section 13 has a duct 64 having one end connected to the cool air discharge section 63 of the cooler unit a. At the other end. The duct 64 has a bellows structure, is made to be able to expand and contract and bend freely, and keeps its form (state) unless an external force acts. Accordingly, by adjusting the length of the duct 31, the height of the cold air blowout portion 13, the front / rear position adjustment, and the direction of the cool air blowout can be easily adjusted.

[0023]

According to the present invention, the support portion 48 provided at the upper end portion of each of the left and right columns 11 supports the center of the lower surface side of the roof 12 in the front-rear direction and the left and right support portions 4.
8, the evaporator 17 of the cooler unit a disposed at the center in the front-rear direction of the roof 12 is provided, and the evaporator 17 is attached to the support portion 48, so that the evaporator 17 and the roof 12 are well balanced with the left and right columns 11. It is supported, and there is an effect that even when the body vibrates up and down, an unreasonable load does not act on the column.

A support 48 provided at the upper end of each of the right and left columns 11 supports the center of the lower surface of the roof 12 in the front-rear direction. Cooler unit a arranged at the center in the front-rear direction
An evaporator 17 and a blower 18 for sending air to the evaporator 17 are attached, a cool air blowing unit 13 for blowing cool air from the evaporator 17 is provided on one side of the roof 12 in front and behind, and air for taking air into the blower 18 is provided on the other side. By providing the intake section 20, the same effect as described above can be obtained.

[Brief description of the drawings]

FIG. 1 is a plan view of a main part.

FIG. 2 is an enlarged plan view of a mounting portion of a cooler unit.

FIG. 3 is a partial cross-sectional side view showing a state in which a support is attached to a roof.

FIG. 4 is a side sectional view of the inside of the roof.

FIG. 5 is a side view of a central portion of the cooler frame.

FIG. 6 is a rear view of a state in which a cooler frame is attached to a support.

FIG. 7 is a side view of the backhoe.

FIG. 8 is a plan view of the backhoe.

FIG. 9 is a rear view of the backhoe.

FIG. 10 is a system diagram showing a structure of a cooling device.

FIG. 11 is a right side view of a canopy portion.

FIG. 12 is a sectional view taken along line AA of FIG. 11;

FIG. 13 is a side view of a right front portion of the backhoe.

FIG. 14 is a perspective view of a right front portion of the backhoe.

FIG. 15 is a side view showing a modification.

[Explanation of symbols]

 Reference Signs List 5 Operating section 11 Post 12 Roof 13 Cold air blowing section 17 Evaporator 18 Blower 20 Air intake section 48 Support section a Cooler unit

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-2-141325 (JP, A) JP-A-11-240340 (JP, A) JP-A 8-183326 (JP, A) JP-A 62-141 55213 (JP, A) Japanese Utility Model Hei 6-50915 (JP, U) Japanese Utility Model Application 51-33953 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B60H 1/32 614 B60H 1/32 613 A01D 67/02 E02F 9/16 B60H 1/00 B60H 1/32 615 B60H 1/00 102 B60H 1/32 101 B62D 33/06

Claims (2)

(57) [Claims] 1. A roof (1) arranged above a driving section (5) and supported by a pair of left and right columns (11).
2) In a working vehicle equipped with a cooler unit (a), a support portion is provided on the left and right sides of the roof (12) at the center in the front-rear direction.
(48) is arranged, and a support is provided on the lower surface of the support portion (48).
The upper end of (11) is fixed and the support (48)
The center of the roof (12)
In front of the roof (12) between the left and right supports (48)
Evaporator of the cooler unit (a) arranged at the center in the rear direction
Sending wind to the porator (17) and the evaporator (17)
Air blowers (18) are arranged, and these are supported (48)
A work vehicle characterized by being attached to a vehicle. To 2. A longitudinal one side of the Le-safe (12), the cool air blowout section for blowing cold air from the evaporator (17) (13)
The provided, characterized by providing an air intake portion (20) for introducing air into the blower (18) to the other side Claim
The work vehicle according to 1 .