JPH11170854A - Tractor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make transmitting difficult of car body vibration, simplify a structure in an air supply part, in an air conditioning unit for a cabin of a tractor provided with the operating cabin. SOLUTION: An operating cabin 10 is supported on a car body through a cushion rubber. An air conditioning unit 30 provided with a cabin cooling evaporator 31, heating heat exchanger 32, etc., is arranged in a condition that a blow port 34 is positioned inside the operating cabin 10, to be mounted in a unit support part 12e of a front side wall 12 of the operating cabin 10 and a cabin support member 41 extended from the front side wall 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a tractor having a driving cabin.

[0002]

2. Description of the Related Art Conventionally, in a tractor having a driving cabin, as shown in, for example, Japanese Patent Application Laid-Open No. 7-47832, an air conditioning unit is bolted around an air conditioner mounting hole of a cabin plate via a vibration isolating rubber. In some cases, air conditioning in the driving cabin can be performed while reducing the transmission of vibration to the air conditioning unit.

[0003]

When the air conditioning unit is mounted on the driving cabin, the end of the air conditioning unit having the air outlet is inserted into the driving cabin or the air outlet is inserted into the through hole of the operating cabin. In this way, air can be supplied from the air conditioning unit into the cabin with a simple structure that does not require a duct that connects the air outlet of the air conditioning unit to the operating cabin. However, conventionally, since relative vibration is generated between the air conditioning unit and the operation cabin, a gap between the members to prevent the members on the air conditioning unit side and the operation cabin side from interfering with each other due to the relative vibration is provided. In this case, it is necessary to provide a sealing means for closing the gap so as not to hinder the air conditioning. An object of the present invention is to provide a tractor capable of air conditioning in a cabin while reducing vibration transmission to an air conditioning unit and simplifying the structure of both the air supply and the seal between the air conditioning unit and an operating cabin. Is to do.

[0004]

The constitution, operation and effect of the invention according to claim 1 are as follows.

[Structure] In a tractor having an operating cabin, the operating cabin is mounted on a vehicle body via a buffer mechanism, and an air conditioning unit for air-conditioning the operating cabin is mounted on the operating cabin.

[Operation] An air conditioning unit is mounted on an operating cabin, and air can be supplied from the air conditioning unit to the operating cabin without connecting the air outlet of the air conditioning unit to the operating cabin by a duct. The vibration of the vehicle body due to running or the like is reduced by a buffer mechanism between the vehicle body and the driving cabin. In other words, even if the air conditioning unit and the driving cabin are connected so as not to vibrate relative to each other, the vibration is hardly transmitted from the vehicle body to the air conditioning unit, and the interference avoidance conventionally required to be provided between the members on the air conditioning unit side and the driving cabin side. Can be omitted.

[Effect] The transmission of vibrations from the vehicle body to the air conditioning unit is reduced, and the air conditioning unit is highly reliable so that a failure or the like due to vibration hardly occurs. Moreover,
A duct connecting the air-conditioning unit's air outlet to the operating cabin is not required, and there is no need to provide a special sealing member between the members of the air-conditioning unit and the operating cabin. Even if a gap is generated and a seal is required, air can be supplied from the air conditioning unit to the operating cabin with a simple structure that requires only a small seal member compared to the case of a gap caused by interference avoidance. Cabin air-conditioning can be performed advantageously in terms of economy.

The structure, operation and effect of the invention according to claim 2 are as follows.

In the structure according to the first aspect of the present invention, the air conditioning unit is mounted such that the air inlet of the air conditioning unit is located outside the operating cabin and the air outlet is located inside the operating cabin.

[Operation] Compared to disposing the entire air conditioning unit in the cabin, a duct for connecting the intake port of the air conditioning unit to the cabin while reducing the space in the cabin required for disposing the air conditioning unit. And supplies air from the air conditioning unit to the cabin.

[Effect] The cabin air conditioning can be performed with a simple structure that does not require a duct for connecting the air outlet of the air conditioning unit to the cabin while minimizing the inside of the cabin being narrowed by the air conditioning unit.

The structure, operation and effect of the invention according to claim 3 are as follows.

In the construction according to the first or second aspect of the present invention, air outlets in the cabin communicating with the air outlets of the air conditioning unit are formed at a plurality of locations in the operating cabin, and the air from the air conditioning unit is fed into the operating cabin. Are provided at a plurality of locations.

[Operation] While the air outlet of the air conditioning unit is directly connected to the cabin without passing through a duct, air from the air conditioning unit is guided by the guide duct to a plurality of air outlets in the cabin, for example, on both lateral sides or in the upper and lower portions. It is supplied in a distributed manner.

[Effect] While air is supplied by a simple structure that does not require a duct, the air from the air conditioning unit can be dispersed to a plurality of locations in the cabin by the guide duct, so that air can be efficiently air-conditioned.

The structure, operation and effect of the invention according to claim 4 are as follows.

[Configuration] In the configuration of the present invention according to claim 2 or 3, the air conditioning unit is mounted so that the heat exchanger provided in the air conditioning unit enters inside the operation cabin.

[Operation] The weight of the air-conditioning unit is dispersed as much as possible inside and outside the cabin, and the air-conditioning unit is supported on the driving cabin with the best possible weight balance.

[Effect] An air conditioner which can be air-conditioned with a simple structure that does not require a duct while minimizing the inside of the cabin becoming narrow due to the air conditioning unit is obtained in a state where it is stably supported by the cabin.

The structure, operation and effect of the invention according to claim 5 are as follows.

(Structure) In the structure of the present invention according to any one of claims 1 to 4, an air intake passage is formed in the engine hood to cover the air conditioning unit and supply air from outside the engine hood to a suction port of the air conditioning unit. A unit support member extending from the operation cabin to the inside of the engine bonnet in a state supported by the operation cabin in a cantilever manner, and the air conditioning unit is mounted on the unit support member via the unit case. Is supported.

[Operation] The air-conditioning unit is disposed in the engine bonnet, and the piping for circulating the heat medium connected to the air-conditioning unit does not have to be drawn out into the engine bonnet. The air conditioning is performed so that hot air in the engine hood is not sucked into the air conditioning unit. The air-conditioning unit is firmly supported by the driving cabin via the unit support member, and is supported by the unit support member via the unit case so that the air conditioning unit can be removed together with the unit case from the unit support member and taken out of the engine hood. And placed in the engine hood.

[Effect] The heat medium circulation pipe is not exposed to the outside and is as short as possible. Further, the air conditioning unit does not suck the internal air of the engine bonnet, and is excellent in appearance and air conditioning efficiency. The air-conditioning unit can be easily removed together with the unit case from the unit support member, and can be easily taken out of the engine bonnet for easy and efficient cleaning and inspection.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, a pair of left and right drivable front wheels 1, 1 and rear wheels 2, 2 are self-propelled, and an engine 3 and an engine hood 4 covering the engine 3 are provided. A lift arm 5 for connecting various working devices such as a rotary tilling device so as to be able to ascend and descend to a rear portion of a vehicle body including a driving unit having a driving cabin 10 located on the rear side of the driving unit. The tractor is provided with a power take-off shaft 6 for transmitting power.

The operating cabin 10 is configured as shown in FIGS. That is, a pair of left and right front pillars 11a and a pair of right and left rear pillars 11 made of an aluminum metal material.
b, a pair of left and right upper ends connected to the upper front horizontal frame 11c, the upper rear horizontal frame 11d, a pair of left and right upper front and rear frames 11e, a pair of left and right lower horizontal front and rear frames 11f, a lower rear horizontal frame 11g, and a lower rear horizontal frame 11g. 11h iron strut,
A lower center front and rear frame 11 made of an iron pipe having a rear end connected to the lower end of one of the columns 11h, 11h.
j, a lower center front and rear frame 11j made of iron pipe whose rear end is connected to the lower end of the other support 11h, an intermediate portion of one of the lower center front and rear frames 11j of the pair of lower center front and rear frames 11j, and the pair of lower and front and rear sides Step support frame 11k connected to the front end straight portion of one frame 11f of frame 11f, and step support connected to the intermediate portion of the other lower center front and rear frame 11j and the front end straight portion of the other lower horizontal front and rear frame 11f. Each of the frames 11k constitutes a cabin frame 11, and the cabin frame 11 and the front side wall 1
2, a pair of left and right side doors 13, 13, and a rear side wall 14.
The driving cabin 10 includes the top plate 15, a sheet metal bottom plate 16, and a pair of left and right rear wheel fenders 17,17.

As shown in FIG. 7, the front side wall 12 is formed by a transparent glass plate portion 12a, a sheet metal portion 12b, and an iron pipe pillar portion 12c connected to the sheet metal portion 12b. The outer peripheral portion of the glass plate portion 12a is
1a and the upper front horizontal frame 11c, and
One end of the left and right sides of the sheet metal part 12b is connected to the connecting piece 11m provided at the front end of one of the lower center front and rear frames 11j of the pair of lower center front and rear frames 11j. The other lower center front and rear frame 11j is bolted to a connection piece 11m provided at the front end, and both ends of the pillar portion 12c are connected to the lower horizontal front and rear frame 11j.
f, the front side wall 12 is bolted to a mounting bracket 18 attached to the front end of the cabin frame 1.
1 is supported.

Each of the pair of side doors 13, 13 is made of a transparent glass plate, and is formed by a pair of upper and lower hinge members 13a, 13a provided on the rear end side.
1b so as to be rotatable about a vertical axis of the cabin, and supported by a cabin frame 11 so that the cabin frame 11 can be opened and closed by a swing operation around the axis. It is configured to open and close a cabin entrance formed by the rear pillar 11e, the rear pillar 11b, and the lower front and rear front and rear frames 11f.

The rear side wall 14 is made of a transparent glass plate, and is connected to the upper rear side frame 11d by a pair of left and right hinges 14a provided on the upper end side so as to be rotatable around the axis of the cabin laterally. It is configured to be supported by the cabin frame 11 so that it can be opened and closed by swinging up and down. The top plate 15 is made of a synthetic resin plate, and is configured so that the peripheral edge portion is connected to each of the upper front horizontal frame 11c, the upper rear horizontal frame 11d, and the upper front and rear frame 11e, and is supported by the cabin frame 11.
Each of the pair of rear wheel fenders 17 is provided with a support bracket 11n provided in the lower horizontal front and rear frame 11f.
And the column 11h to support the cabin frame 11. The bottom plate 16 includes a pair of right and left step-and-go and step-on steps 1 on the front end side.
6a and a pair of lower center front and rear frames 11j, 11j and a step support frame 11 which are configured to attach the driver's seat 7 to the upper surface on the rear end side.
and the lower center front and rear frame 11
j, step support frame 11k, lower horizontal front and rear frame 1
It is configured to be supported by the cabin frame 11 by being connected to 1f.

The driving cabin 10 is configured to be mounted on a vehicle body based on the mounting structure shown in FIGS. That is, the pair of lower horizontal front and rear frames 1
The mounting bracket 18 attached to the front end of each of 1f and 11f is placed via a cushion rubber 20 on a cabin support member 19a extending from an intermediate portion of the vehicle body consisting of a transmission case 8 connected to a rear portion of the clutch housing. The cushion rubber 20 and the cabin support member 19a
The mounting bracket 18 is prevented from coming off by a connecting bolt 21 that penetrates a cushion rubber 20 or the like located below the mounting bracket 18. The mounting support 11h is connected via a cushion rubber 20 to a cabin support member 19b which is connected to a rear portion of the transmission case 8 and extends from a rear portion of a vehicle body including a transmission case 9 which houses a traveling and work mission. The cushion rubber 20 and the cushion rubber 20 located below the cabin support member 19b.
Mounting column 11 by connecting bolt 21 penetrating
h is prevented from coming off. In other words, the driving cabin 10 is supported by the vehicle body via the cushion rubber 20 that attenuates vehicle body vibration caused by driving the engine or traveling and makes the vibration less likely to be transmitted to the driving cabin 10.

As shown in FIGS. 2 and 3, a compressor 22 for compressing a refrigerant is mounted on the front end side of the engine 3, and a driving pulley 22 for driving the compressor 22 is provided.
a is linked with the output shaft of the engine 3 by a transmission belt to enable the driving of the compressor 22 by the engine 3, and the refrigerant condenser 24 is arranged on the front side of the engine cooling radiator 23 located in front of the engine 3. The cooling air is supplied to the condenser 24 for the refrigerant by a rotary fan 25 movably disposed on the rear surface side of the radiator 23 so as to suck and supply the cooling air to the radiator 23, and the cooling air is supplied to the compressor 22 and the condenser 24. An air conditioning unit 30 including an evaporator 31 configured to be connected by a refrigerant circulation pipe 26, a heating heat exchanger 32 configured to take in heat generated by the engine 3 for heating by a hot water circulation hose 27, and the like. Front wall 1 of driving cabin 10
2 to allow air conditioning for cooling and heating the operation cabin 10, and is configured in detail as follows.

As shown in FIG. 3 to FIG.
Reference numeral 0 denotes an equipment case 35 having a pair of left and right suction ports 33, 33 at the front end side and one air outlet 34 at the rear end side, and a pair of left and right rotating fans located at the front end side inside the equipment case 35. 36, 36, an electric fan motor 37 in which the respective rotating fans 36, 36 are integrally rotatably mounted on the output shaft, the evaporator 31 located behind the rotating fan 36 in the equipment case, and The heating heat exchanger 3 located rearward of the evaporator 31
2, the air conditioner unit 30 covers most of the air conditioner unit except the air outlet 34 with the unit case 40, and the air outlet 34 is located behind the instrument panel 28 inside the operation cabin 10; It is attached to the air-conditioning unit support portion 10a of the driving cabin 10 having a unit attachment hole 12d provided in the iron plate portion 12b of the front side wall 12. The air outlet side of the guide duct 29 communicates with the air outlet 34, and the guide duct 29
The first air outlet 29a in the first cabin located on both sides of the instrument panel 28, and the pair of left and right second air outlets 2 in the cabin located near the front end of the bottom plate 16
9b.

When the fan motor 37 is driven, the air-conditioning unit 30 draws air from the suction port 33 into the inside of the equipment case 35 by the suction and blowing action of each rotary fan 36 driven by the fan motor 37. The air supplied to the evaporator 31 and the heating heat exchanger 32 is cooled by the evaporator 31 and the heating heat exchanger 32.
The heated air is sent out from the outlet 34. Then
The guide duct 29 guides the cooling air and the heating air from the air conditioning unit 30 to the cabin outlets 29a and 29b, and the both sides of the instrument panel 28 inside the operation cabin 10 and the left and right operation steps 16a and 16a. Blows out to multiple places with near.

The air-conditioning unit support 10a is a unit support 12e formed by bending a part of the iron plate 12b toward the inside of the cabin.
A unit support member 41 extending from the iron plate portion 12b above the engine 3 inside the engine hood 4 and connected only to the iron plate portion 12b so as to be cantilevered by the iron plate portion 12b; Hole 12d
It is constituted by and. The unit case 40 has a front end side inside the engine hood 4 and a rear end side inside the operation cabin 10 through the unit mounting hole 12d.
2e, and attaches the air conditioning unit 30 to the unit support member 41 and the unit support portion 12.
The air conditioning unit 30 is fastened and fixed to the unit support member 41 and the unit support portion 12e by an attachment bolt that is fastened and fixed to the unit support member 12e.
That is, in the air conditioning unit 30, the suction port 33 is located outside the operating cabin 10 and the rear side of the heating heat exchanger 32 and the outlet 34 are located closer to the operating cabin 1 than the outer surface of the front wall 12.
0 and the unit case 40
The unit support member 41 and the unit support portion 12e support the unit support member 41 and the unit support portion 12e so that they can be removed together with the unit case 40 by removing the unit support member 41 and the unit support portion 12e.

An intake case 42 is provided above a rear end portion of the unit case 40 located in the operation cabin. The intake case 42 has an inside air intake 42a that opens upward into the interior of the driving cabin 10,
An outside air intake port 42b is provided on the outside of the driving cabin 10 through a through hole 12f located above the unit mounting hole 12d of the vehicle 2b and opens forward of the vehicle body. An intake passage 43 for connecting the inside air intake port 42a and the outside air intake port 42b to the left and right intake ports 33, 33 of the air conditioning unit 30 is formed inside the engine hood 3 by the unit case 40. That is, the air-conditioning unit 30 takes in the air inside the operation cabin from the inside air intake port 42a and the air outside the operation cabin from the outside air intake port 42b into the inside of the unit case 40 by the suction action of the rotary fan 36, and Through each of the suction ports 33. As a result, the air conditioning unit 30 sucks both the air inside and outside the operating cabin 10 while isolating the air inside the engine hood 4 from the inside of the engine hood 4.

Inside the intake case 42, an air filter 44 and an intake switching body 45 located above the air filter 44 are provided.
An operating portion 45a formed to protrude upward from the long hole 42c as shown in FIG.
Is manually slid in the front-rear direction along the elongated hole 42c, the intake switching body 45
The first air-conditioning position in which the inside air intake 42a is opened and the outside air intake 42b is closed, and only the cabin interior air is introduced into the air-conditioning unit 30; and the inside air intake 42a is also the outside air intake 42b. A second air-conditioning position in which both the inside and outside of the cabin are taken into the air-conditioning unit 30 by opening the air-conditioning unit 30; The air conditioner is configured to switch to a third air conditioning position to be taken into the air conditioner 30.

The air filter 44 filters air from both the inside air intake port 42a and the outside air intake port 42b, and is supported by a filter support 47. As shown in FIG.
7 includes a filter support frame portion 47a configured to insert and remove the air filter 44 from above, and a pair of holding spring plate portions 47b. Then, as shown in FIG. 3, the filter support frame 47a of the filter support 47 is provided.
Is inserted into the intake case 42 from the filter insertion opening, the holding spring plate 47b is brought into contact with the bottom plate of the intake case 42, and the air filter 44 is pressed and held in the intake case by the reaction force thereof, so that the air filter 44 is sucked. The case 42 can be mounted in a use state. In other words, the air filter 44 can be attached to or removed from the intake case 42 by operating the filter support 47 in and out of the intake case 42.

That is, when the air conditioning unit 30 is operated to the cooling side, the air cooled by the air conditioning unit 30 is sent out from the air outlet 34 by the evaporator 31, and the air is diffused by the guide duct 29 to a plurality of locations in the operation cabin and supplied. Is done. Thereby, the cabin can be cooled. When the air-conditioning unit 30 is operated to the heating side, the air-conditioning unit 30 sends out the air heated by the heating heat exchanger 32 from the air outlet 34, and the air is diffused and supplied to a plurality of locations in the operation cabin by the guide duct 29. You. Thus, the cabin can be heated. In both the case of cooling and the case of heating, the air intake switching body 45 is connected to the first
When the air conditioning unit is operated to the air conditioning position, the air conditioning unit 30 takes in only the cabin air, cools and heats the air, and returns the cabin to the cabin. Air circulation air-conditioning can be performed. When the air intake switching body 45 is operated to the second air conditioning position, the air conditioning unit 30 takes in air both inside the cabin and outside the cabin, cools and heats the air, and sends the air into the cabin. And air conditioning unit 30 to cool and heat the outside air of the cabin and send it into the cabin to perform mixed air conditioning for cooling and heating. When the intake air switching unit 45 is operated to the third air conditioning position, the air conditioning unit 30 can perform outside air supply air conditioning in which only the outside air of the cabin is taken in, cooled and heated, and sent into the cabin to perform cooling and heating.

[Another Embodiment] FIG.
FIG. 1 shows an embodiment having a different embodiment in terms of the arrangement of 0s. That is, the structure of the driving cabin 10, the cabin mounting structure for supporting the driving cabin 10 on the vehicle body via the cushion rubber, and the structure of the air conditioning unit 30 are configured in the same manner as those described in the above embodiment. The air conditioning unit 30 is arranged such that the suction port 33 is located outside the driving cabin 10 and the engine hood 4 and the air outlet 34 is positioned inside the driving cabin 10, and the front side wall 12 of the driving cabin 10 and the front side wall 12 It extends over the engine hood 4 toward the front of the vehicle body and is attached to a unit support member 46 that is cantilevered on the front side wall 12.

FIG. 14 shows an air conditioner having a further different embodiment in terms of the arrangement of the air conditioning unit 30. That is, the structure of the driving cabin 10, the cabin mounting structure for supporting the driving cabin 10 on the vehicle body via the cushion rubber, and the structure of the air conditioning unit 30 are configured in the same manner as those described in the above embodiment. The air conditioning unit 30 is arranged such that the suction port 33 is located outside the rear of the driving cabin 10 and the air outlet 34 is positioned inside the driving cabin 10.
The rear side wall 14 and a unit support member 46 extending from the rear side wall 14 toward the rear side of the vehicle body are attached.

The cushion rubber 20 may be replaced by a cushion spring or an air cushion device. Therefore, these are collectively referred to as a buffer mechanism 20.

[Brief description of the drawings]

Fig. 1 Side view of the entire tractor

FIG. 2 is a side view of the air conditioner.

FIG. 3 is a side view of an air-conditioning unit installation section.

FIG. 4 is a plan view of an air-conditioning unit installation section.

FIG. 5 is a plan view of an air conditioning unit.

FIG. 6 is a perspective view of the intake case in an exploded state.

FIG. 7 is a perspective view of a front wall.

FIG. 8 is a perspective view of the cabin frame in a partially disassembled state.

FIG. 9 is a perspective view of the driving cabin in an exploded state.

FIG. 10 is a plan view of a cabin frame.

FIG. 11 is a front view showing the mounting structure of the front part of the driving cabin.

FIG. 12 is a front view showing the mounting structure at the rear of the driving cabin.

FIG. 13 is a side view of the entire tractor provided with the air conditioning structure of another embodiment.

FIG. 14 is a side view of the entire tractor provided with the air conditioning structure of another embodiment.

[Explanation of symbols]

 Reference Signs List 4 engine bonnet 8, 9 vehicle body 10 operating cabin 20 buffer mechanism 29 guide duct 29a, 29b cabin outlet 30 air conditioning unit 32 heat exchanger 33 inlet 34 outlet 40 unit case 41 unit support member 43 intake path

Claims (5)

[Claims] 1. A tractor provided with an operating cabin, wherein the operating cabin is mounted on a vehicle body via a buffer mechanism, and an air conditioning unit for air-conditioning the operating cabin is mounted on the operating cabin. 2. The tractor according to claim 1, wherein the air conditioning unit is mounted such that an intake port of the air conditioning unit is located outside the driving cabin and an air outlet is located inside the driving cabin. 3. A guide duct for discharging air from the air conditioning unit to a plurality of locations in the driving cabin, wherein a plurality of outlets in the cabin communicating with the outlets of the air conditioning unit are formed in the operating cabin. A tractor according to item 1 or 2. 4. The tractor according to claim 2, wherein the air conditioner unit is mounted so that a heat exchanger provided in the air conditioner unit enters the inside of the driving cabin. 5. A unit case which covers the air conditioning unit and forms an intake passage for supplying air from outside the engine hood to an intake port of the air conditioning unit in the engine bonnet, wherein the unit case is supported by the driving cabin in a cantilever manner. 5. The air conditioning unit according to claim 1, further comprising: a unit support member extending from an operation cabin into an engine hood, wherein the unit support member supports the air conditioning unit via the unit case. 6. Tractor.