JP3717386B2 - Agricultural tractor - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an agricultural tractor in which an air conditioner unit is provided on the back side of a control panel.
[0002]
[Prior art]
When the air conditioner unit is installed on the top side of the ceiling of the driving cabin, the height of the driving cabin increases due to the space required for the arrangement of the air conditioning unit and the cover attached to the driving cabin so as to cover the air conditioning unit. Height increases. For this reason, the agricultural tractor is provided with an air conditioner unit on the back side of the control box so that the height of the entire tractor can be made as low as possible.
[0003]
[Problems to be solved by the invention]
In the agricultural tractor, if an air conditioner operation panel for turning on and off the air conditioner is provided on the ceiling of the driving cabin as before, the operation panel is arranged, or a mechanism for linking the operation panel operation tool to the air conditioner unit is arranged. Due to the necessary space, the height of the driving cabin cannot be lowered sufficiently.
[0004]
In the case of this type of agricultural tractor, it is necessary to clean and replace the filter that acts on the air-conditioning air sucked by the air-conditioning unit. It takes time to attach and detach, resulting in poor work efficiency.
[0005]
In the case of this type of agricultural tractor, the temperature-controlled air sent from the air conditioner unit is supplied to the outlet of the control panel, etc., and supplied from the outlet to the cabin. The temperature-controlled air from the air-conditioner unit is supplied by a dedicated duct. Supplying to the outlet increases the cost.
The purpose of the present invention is to make it easy to operate the air conditioner while keeping the height of the operating cabin as low as possible and making the air conditioner operation panel less likely to become an obstacle to operation, or to clean and replace the filter efficiently. It is to provide an agricultural tractor that can .
[0006]
[Means for Solving the Problems]
The configuration, operation, and effect of the invention according to claim 1 are as follows.
[0007]
[Configuration] In an agricultural tractor with an air conditioning unit on the back of the control panel,
Below the steering handle shaft of the control panel, an air conditioner control panel having a width that is narrower than the left and right width of the control panel is attached closer to the center than the end position of the control panel in the left-right direction. In addition, the air conditioner operation panel includes an adjustment operation tool in which the adjustment operation direction is set to the left-right direction, and the adjustment operation area is disposed so as to overlap in the left-right direction with the location where the steering handle shaft is present. ing.
[0008]
[Operation] Since the air conditioner control panel is attached to the above-mentioned part of the control panel, even if the height of the operation cabin is lowered compared to the case where the air conditioner control panel is placed on the ceiling, the cabin can be operated at the desired height. The air conditioner operation panel can be operated in the cabin while the space is secured and the air conditioner operation panel is positioned between the two feet of the driver so as not to be an obstacle for pedal operation and handle operation.
[0009]
[Effect] Therefore, while the air conditioning operation can be easily performed in the cabin, the height of the tractor can be lowered so that the driving cabin is as low as possible and it is easy to work under the orchard of the orchard. The panel was made difficult to obstruct and easy to drive.
[0010]
The structure, operation, and effect of the invention according to claim 2 are as follows.
[0011]
[Configuration] In an agricultural tractor with an air conditioning unit on the back of the control panel,
An internal air intake for taking in the internal air of the air conditioner unit located in the internal space of the control panel is formed in the unit case of the air conditioner unit on the back side of the control panel provided in the driving cabin, While installing a filter that acts on the air conditioning air sucked by the air conditioning unit,
The control panel portion at a location facing the internal air inlet to which the filter is mounted is provided with a vent capable of taking the air in the driving cabin into the internal air inlet side, and the panel of the portion provided with this vent The part is configured as a separate part from the other control panel part located in the vicinity thereof, and is detachably connected to the other control panel part.
[0012]
[Operation] Even if only the part of the control panel corresponding to the filter is removed, the filter can be exposed so that it can be cleaned or replaced.
[0013]
[Effects] When cleaning or exchanging the filter, it is possible to perform the work efficiently from the attaching / detaching surface of the control panel by simply removing the panel portion which is a part of the control panel.
[0014]
[0015]
[0016]
[0017]
[0018]
DETAILED DESCRIPTION OF THE INVENTION
As shown in FIG. 1, a driving unit that is self-propelled by a pair of left and right steering and driveable front wheels 1 and a pair of left and right driveable rear wheels 2 and that has an engine 3, an engine bonnet 4, and the like is on the front side. A pair of left and right lifts connected to a transmission case 6 that forms a rear portion of a vehicle body that is provided and has a driving part having a driving cabin 5 on the rear side so that various working devices such as a rotary tiller can be moved up and down. An agricultural tractor is configured by providing the arm 7 and a power take-out shaft 8 for transmitting the turning power from the engine 3 to the connected working device.
[0019]
As shown in FIGS. 3 and 6, an instrument panel 10 having a speedometer, a fuel gauge, and the like is provided at the upper end in front of a driver seat 9 in the driver's cabin, and is slightly below the instrument panel 10. The steering panel 12 through which the steering handle shaft 11a is inserted is provided. Set the lift lever 7 for raising and lowering the lift arm 7 and raising and lowering the connecting work device to the position deviated from the steering handle shaft 11a of the control panel 12 toward the vehicle body side, and adjusting the accelerator of the engine 3 to the adjustment position. A state in which the front wheel 1 is driven at a higher speed than the rear wheel 2 by switching the accelerator lever 15, the engine start key switch 16, and the front wheel transmission, and the front wheel 1 is driven at the same speed as the rear wheel 2. The front wheel speed change lever 17 that reveals the state of the vehicle and the parking brake lever 18 that applies the parking brake while fixing the brake pedal in the on position are arranged.
[0020]
The steering handle shaft 11 a is supported by a handle support 19 located inside the control panel 12. The handle support 19 is supported by a member fixed on the vehicle body side so as to be swingable around a lateral axis of the vehicle body, and the steering handle 11 is swing-adjusted with respect to the vehicle body together with the handle support body 19. It is supported by the handle support 19 so that it can. Thus, the steering handle 11 is a tilt handle so that the mounting angle of the steering handle 11 can be adjusted around the axis by adjusting the handle support 19 to swing.
[0021]
As shown in FIGS. 3 and 6, an air conditioner unit 20 having an evaporator 21 and a blower fan 22 is provided on the back side of the control panel 12, and a cylindrical body 30 is provided on both sides of the top plate portion 12 a of the control panel 12. And a circular upper outlet 31 provided so as to be positioned at a slightly higher level than the top surface of the top panel 12a of the control panel 12 and a rectangular provided on both sides of the lower end of the control panel 12. The foot outlet 33 is positioned at a higher level than the foot outlet 33 on both sides of the control panel 12 and at a lower level than the upper outlet 31, and the steering handle shaft 11 a. The temperature-controlled air from the air conditioner unit 20 is supplied from the air outlet units 31 to 33 to the rectangular central air outlet 32 provided with a through hole in a portion located on the side of the air conditioner. It is configured to be supplied within, Yes to allow the air conditioning to cool and heat the operation unit, specifically, are constructed as follows.
[0022]
As shown in FIG. 6 and the like, the pair of upper air outlets 31 are positioned so as to be displaced in the lateral direction of the vehicle body with respect to the wiper motor 13 located on the back side of the upper end portion of the control panel 12 and the instrument panel 10. In addition, they are distributed in the lateral direction of the vehicle body so that a gap is formed between the left and right upper outlets 31.
[0023]
As shown in FIGS. 3, 5, 10, and the like, the air conditioner unit 20 includes the evaporator 21, the heater core 23, the blower fan 22, and a hollow unit case 26 that supports these, An air intake guide 27 is connected to the unit case 26 on the side of the blower fan 22.
In the unit case 26, air blowing ports 25 are formed on both lateral sides of the heater core 23 by a portion 26 a located on the front end side of the air conditioner unit 20. The intake guide 27 forms a vehicle body upward-facing outside air suction port 28 having an inside / outside air switching valve mechanism 47 and a vehicle body laterally outward internal intake port 29 having an inside air filter 44.
[0024]
The air conditioner unit 20 includes a partition 34 provided so as to separate an engine bonnet space and a driving cabin space between a driving part and a driving part, and the control panel 12 includes a clutch housing 3a on the back side of the control panel 12. In the space formed above, it is assembled in the following assembling posture.
[0025]
That is, as shown in FIGS. 3 and 4, the rotational axis of the blower fan 22 is a lateral axis of the vehicle body, and the blower fan 22 is positioned at a lower level than the arrangement level of the evaporator 21 and the heater core 23. Further, the blower fan 22 is assembled so that the lower end of the blower fan 22 is located near the upper end of the clutch housing 3a. The evaporator 21 and the heater core 23 are assembled so that they are aligned in the longitudinal direction of the vehicle body, and the heater core 23 is positioned on the front side of the vehicle body with respect to the evaporator 21. The evaporator 21 and the heater core 23 are assembled so that the length in the longitudinal direction of the vehicle body in a side view of the vehicle body is in a vertically long position where the length is smaller than the length in the vertical direction of the vehicle body. As shown in FIG. 5 and the like, the front end portion 26a of the unit case 26 provided with the pair of left and right air vents 25 is arranged such that the exhaust direction of the heater core 23 is directed forward of the vehicle body, and the driving portion of the partition wall 34 is provided. It is assembled so as to enter the inside of the portion 34a protruding to the side. The blower fan 22 is positioned so as to be eccentric to one side of the vehicle body laterally with respect to the evaporator 21 and the heater core 23, and as shown in FIG. The key switch 16, the front wheel speed change lever 17, and the parking brake lever 18 are assembled so that they are located on the other end side of the vehicle body with respect to the steering handle shaft 11a. is there. A unit mounting portion 34c provided with a bolt hole in the protruding portion 34a of the partition wall 34, a unit mounting portion 34d provided with a bracket attached to the other portion of the partition wall 34, or a unit case on the other unit mounting portion. 26 is fixed by fastening with a connecting bolt.
[0026]
As shown in FIGS. 1, 2, 5, 10, 13, and the like, the vehicle body lateral axis around the vehicle bonnet 4 located on the rear end side of the engine bonnet with respect to the portion 4 a fixed to the vehicle body of the engine bonnet 4. The outer part located outside the space formed by the partition wall 34 and the control panel 12 by the part 4b that swings up and down and the sheet metal member 35 attached to the outer surface side of the opening and closing bonnet part 4b. A duct 36 is formed. One end side is connected to the external duct 36 and the protruding portion 34a of the partition wall 34, and the other end side is inserted through a through hole 34b provided on one end side in the vehicle body lateral direction of the partition wall 34 so that the control panel in the cabin is provided. The air intake unit 39 is configured to allow the air conditioner unit 20 to take in the outside air of the operating cabin 5 as air conditioning air.
[0027]
That is, as shown in FIG. 13, a plurality of through-holes elongated in the front-rear direction of the vehicle body are formed in the sheet metal member 35 at the ends of the external duct 36 located on both lateral outer sides of the opening / closing bonnet portion 4 b of the engine bonnet 4. An external air inlet 40 is formed, and an external air supply hole 41 is formed in the middle portion of the external duct 36 in the left-right direction of the vehicle body.
[0028]
The internal duct 37 is provided with an external air intake 43 that communicates with the external air supply hole 41 of the external duct 36 via an external air filter 42 on one end side, and an opening on the other end faces the through hole 34 b of the partition wall 34. One end side communicates with the portion 37a located in the engine bonnet in the state and the inside portion 37a of the partition wall 34 near the through hole 34b, and the other end communicates with the outside air suction port 28 of the air conditioner unit 20. It is comprised by the part 37b located in a cabin in the state. As shown in FIGS. 11 and 12, the air in the operating cabin is sucked into the air conditioner unit 20 by the suction force of the blower fan 22 in the portion 12 b of the control panel 12 facing the internal intake port 29 of the air conditioner unit 20. An air vent 46 with a dust removing net is provided.
[0029]
The bonnet inner portion 37a of the internal duct 37 is formed by the protruding portion 34a of the partition wall 34 and a sheet metal member attached to the wall surface of the protruding portion 34a facing the engine bonnet. It is located outside the space formed by the control panel 12. The outside air filter 42 remains inside the internal duct 37 even when the opening / closing bonnet portion 4b is lifted and opened, and is located outside the space formed by the partition wall 34 and the control panel 12. It is fixed to the outside air intake 43 of the duct 37.
[0030]
The inside / outside air switching valve mechanism 47 can be switched between the inside air side and the outside air side by the swinging operation of the operation portion 47a. When the inside / outside air switching valve mechanism 47 is switched to the outside air side, the outside air suction port 28 is switched to the open side and the inside duct 37 is guided to the intake air. 27, the blower fan 22 can suck the cabin outside air from the external intake port 40 of the intake duct 39. When switched to the inside air side, the outside air suction port 28 is switched to the closed side, so that the blower fan 22 can suck the cabin inside air from the internal intake port 29.
[0031]
2 and 9, the air conditioner unit 20 is connected to the front end portion 26a of the unit case 26 and the pair of left and right air outlets 25 of the front end portion 26a, respectively, and the air conditioner unit. 20 and a pair of air duct bodies 48 provided inside the control panel 12 so as to be arranged on both sides of the air conditioner unit 20 so as to be arranged in the horizontal direction of the vehicle body, and a guide attached to the inner surface side of the control panel portion 12b. The cylinder 12c constitutes an air duct 49 that supplies temperature-controlled air from the air conditioner unit 20 to the six outlets 31 to 33.
[0032]
As shown in FIG. 11, the left and right blast duct bodies 48 and 48 face the introduction cylinder 48a at the middle in the vertical direction and the direction opposite to the opening of the introduction cylinder 48a. The upper and lower ends are provided with air outlets 48c, 48d, 33, which are connected to the air outlet 25 of the unit case front end portion 26a by the introduction cylinder part 48a. Temperature-controlled air from the heater core 23 of the air conditioner unit 20 is introduced into the interior and distributed to the upper and lower three air outlets 48b, 48c, 48d, 33, and supplied to the upper outlet 31 from the upper air outlet 48a. The air is blown into the cabin from the upper blow-out port 31, supplied to the central blow-out port 32 from the blower port 48 b in the intermediate portion, and blown out from the central blow-out port 32 into the cabin. A lower end opening 48d of one air duct body 48 communicates with the guide cylinder 12c of the control panel portion 12b, and supplies the temperature-controlled air from the air conditioner unit 20 to the foot outlet 33 via the guide cylinder 12c. The air is blown out from the foot outlet 33 into the cabin. The lower end opening 33 of the other air duct body 48 forms the other foot outlet 33, and blows the temperature-controlled air from the air conditioner unit 20 through the foot outlet 33 into the cabin.
[0033]
Wind direction control tools 31a are provided at the left and right upper air outlets 31, respectively. This air direction control tool 31a can be adjusted in a three-dimensional direction along a spherical support surface provided by attaching a support to the air duct body 48, and by adjusting the rotation, The blowing direction of the temperature-controlled air blown into the cabin from the mouth 31 can be adjusted to an arbitrary direction such as leftward, rightward, upward, downward, or diagonally.
[0034]
As shown in FIGS. 3, 4, 7, etc., a metal pipe that extends from the evaporator 21 and has an extended end projecting into the engine bonnet from a through hole provided on one end of the partition wall 34 in the left-right direction of the vehicle body. Thus, an inlet 21a and an outlet 21b for the cooling medium of the evaporator 21 are formed, and the extension end side protrudes into the engine bonnet from a through hole provided on the other end side of the partition wall 34 in the left-right direction of the vehicle body. An inlet 23a and an outlet 23b for the heating medium of the heater core 23 are formed by the metal pipe. Thereby, the inlet 21a and the outlet 21b of the cooling medium of the air conditioner unit 20 protrude from the partition wall 34 to the driving portion side, and are positioned on one side of the engine 3 in the longitudinal direction of the vehicle body. The medium inlet 23a and the outlet 23b protrude from the partition wall 34 toward the driving portion and are located on the other side of the engine 3 in the longitudinal direction of the vehicle body.
[0035]
As shown in FIG. 7, a cooling medium supply hose in which the cooling medium inlet 21 a is routed through the side opposite to the side where the muffler 50 of the engine 3 is located and a receiver 51 is provided in the middle. 52 is connected to the heat medium delivery side of the condenser 54 provided on the front side of the engine cooling radiator 53, and the cooling medium outlet 21 b is driven by the engine 3 near the front end of the engine 3 by the cooling medium reduction hose 55. It was connected to the heat medium intake side of the compressor 56 configured and provided, and the heat medium discharge side of the compressor 56 was piped so as to pass through the side opposite to the side where the muffler muffler 50 of the engine 3 is located. The cooling medium supply hose 57 is connected to the heat medium receiving side of the capacitor 54. As a result, the cooling medium circulates between the condenser 54 and the evaporator 21, exchanges heat with the cooling air using the condenser 54, and then exchanges heat with the air-conditioning air using the evaporator 21.
[0036]
The heating medium inlet 23a is piped so as to pass the side of the engine 3 where the muffler 50 is located, and a heating medium supply hose 59 provided with a temperature control valve 58 in the middle of the engine cooling radiator 53 is provided. Connected to the upper tank, the heating medium outlet 23b is connected to the lower tank of the engine cooling radiator 53 by a heating medium reducing hose 60 piped so as to pass the side of the engine 3 where the muffler 50 is located. Connected. Thereby, engine cooling water as a heating medium heated by cooling the engine 3 is supplied to the heater core 23 to exchange heat with air for air conditioning, and then returns to the radiator 53.
[0037]
As shown in FIGS. 2 and 6, an air conditioner switch 63, a temperature adjuster 64, and an inside / outside air switch are provided at a position below the steering handle shaft 11 a passing through the handle shaft hole of the control panel 12. An air conditioner operation panel 66 provided with a tool 65 is attached. The air conditioner switch 63 is a rotary operation type that is switched by rotating a knob. When the switching operation is performed, the electric motor M that drives the blower fan 22 is operated to turn the blower fan 22 on and off, Change the rotation speed and adjust the air flow. The temperature adjustment tool 64 is a slide type that is slid along the guide groove of the operation panel 66. When the temperature adjustment tool 64 is slid, the operation portion of the temperature control valve 58 is switched through an operation cable. The inside / outside air switching tool 65 is a sliding type that slides along the guide groove of the operation panel 66. When the sliding operation is performed, the operation portion 47a of the inside / outside air switching valve mechanism 47 is switched via the operation cable and the link mechanism. Manipulate.
[0038]
That is, when the air conditioner switch 63 is switched to the on side, the blower fan 22 is driven, and the air conditioner unit 20 is moved from the external intake port 40 to the intake guide 27 via the intake duct 39 by the suction and discharge action of the blower fan 22 or Air conditioning air is introduced into the intake guide 27 from the internal intake port 29 and introduced into the unit case 26 from the intake guide 27, and is supplied to the evaporator 21 and the heater core 23 in the unit case 26 for cooling. Heat treatment. That is, the evaporator 21 is passed from the rear side to the front side, and then the heater core 23 is supplied so as to pass from the rear side to the front side. The evaporator 21 is cooled, and the heater core 23 is heated. The temperature-controlled air after cooling and warming treatment is discharged from the heater core 23 toward the front of the vehicle body and sent to the center portion of the front end portion 26a of the unit case 26 in the left-right direction. Then, the right and left duct bodies 48 of the air duct 49 supply the temperature-controlled air from the air conditioner unit 20 to the upper air outlet 31, the central air outlet 32, and the foot air outlet 33, respectively, and drive cabins from the air outlets 31 to 33, respectively. Blow in.
[0039]
When the temperature adjuster 64 is operated, the temperature control valve 58 is activated to adjust the amount of hot water supplied to the heater core 23. Then, the heating process by the heater core 23 changes, and the temperature of the temperature-controlled air that blows out from the air blowing ports 31 to 33 changes. That is, the temperature of heating and cooling can be adjusted.
[0040]
When the inside / outside air switching tool 65 is operated to the outside air side, the inside / outside air switching valve mechanism 47 is switched to the outside air side. Then, the air conditioner unit 20 sucks the cabin outside air as air conditioning air and performs air conditioning while sending the outside air into the cabin. When the inside / outside air switching tool 65 is operated to the inside air side, the inside / outside air switching valve mechanism 47 is switched to the inside air side.
Then, the air conditioner unit 20 sucks the cabin inside air as air conditioning air and performs air conditioning while circulating the cabin inside air.
[0041]
As shown in FIGS. 6 and 11, the panel portion 12b of the control panel 12 that faces the internal air intake port 29 of the air conditioner unit 20 is formed as a separate part from the other control panel portions. The other panel portion is detachably connected by a mounting screw 12d. As a result, when the panel portion 12b is removed, the inside air filter 44 is exposed in the cabin and can be easily cleaned and replaced.
[0042]
As shown in FIG. 2 and the like, a heat insulating plate 70 is provided near the front side of the partition wall 34 in the engine bonnet while being supported by the rear end portion of the engine 3. The heat insulating plate 70 covers the bonnet inner portion 37a of the internal duct 37 and the partition wall 34 in a state where a gap 71 exists between them, and the air conditioning unit 20 sucks the air conditioning air sucked from the external air inlet 40 into the engine. Makes it difficult to transfer heat such as engine heat dissipation in the hood.
[0043]
The gap 71 between the heat insulating plate 70 and the bonnet inner portion 37 a of the internal duct 37 communicates with the inside of the external duct 36 around the outside air filter 42 via the outside air supply hole 41 of the outside duct 36. Thereby, the outside air that has flowed into the external duct 36 from the external air inlet 40 enters the gap 71 and cools the heat insulating plate 70, thereby improving the temperature rise prevention effect of the internal duct 37 and the partition wall 34 by the heat insulating plate 70.
[0044]
[Another Embodiment] FIG. 14 shows a part of an agricultural tractor having an air conditioner unit according to another embodiment. In this tractor, the air conditioner unit 20 is mounted on the back side of the control panel 12 in the assembled posture shown in FIG. Is assembled. That is, the portion of the unit case 26 that includes the blower fan 22 and the pair of left and right intake ports 24 is located inside the portion 34 a that protrudes toward the driving portion of the partition wall 34, and the evaporator 21. The heater core 23 is located on the vehicle body rear side of the blower fan 22, and the heater core 23 is assembled in an assembling posture located above the evaporator 21.
[0045]
An internal duct 75 attached to the wall surface of the partition wall 34 on the driving portion side of the protruding portion 34a and communicating with the inside of the protruding portion 34a through a through hole of the protruding portion 34a, and an external duct shown in FIG. An air intake duct 76 that allows the air conditioner unit 20 to take in the outside air of the operating cabin 5 as air conditioning air is configured by an external duct 36 similar to 36.
[0046]
An inside / outside air switching valve mechanism 47 is provided inside a portion of the internal duct 75 located between the outside air filter 42 and the air conditioner unit 20.
[0047]
As shown in FIGS. 14 and 15, the air conditioner unit 20 includes a rear air outlet 77 provided on both lateral sides of the rear end portion of the unit case 26, and upper portions provided on both lateral sides of the upper end portion of the unit case 26. Temperature-controlled air is sent out from the air blowing port 78. The temperature-controlled air from the left and right rear blowing ports 77 is directly supplied from the rear blowing ports 77 to the central outlet 32 of the control panel 12. The temperature-controlled air blown out from the left and right upper air outlets 78 is distributed to the upper end side and the lower end side thereof by the air duct 79 connected to the upper air outlet 78 by the introduction tube portion, and from the upper end opening. The air is supplied to the upper outlet 31 of the control panel 12 and blown into the cabin, and the opening at the lower end portion forms a foot outlet 33, from which temperature-controlled air is blown into the cabin.
[0048]
FIG. 16 shows an air conditioner provided with still another embodiment. In this air conditioner, an upper outlet formed by attaching the cylindrical body 30 to both sides of the top panel 12a of the control panel 12 is shown. 31, a central outlet 32 formed by opening through holes on both lateral sides of the intermediate portion in the vertical direction of the control panel 12, and a foot formed by opening through holes on both lateral sides of the lower end of the control panel 12 An outlet 33 is provided in the control panel 12.
[0049]
As shown in FIGS. 16, 17, etc., the front end side portion 26 a of the unit case 26 of the air conditioner unit 20, the control panel 12, and the control panel 12 are formed in a bowl shape as separate parts, and the control panel 12 has the above-described configuration. An airflow guide 80 attached to the back side of the portion provided with the central air outlet 32 and the foot air outlet 33, and a bellows-like shape connecting the air outlet of the airflow guide 80 to the air outlet 25 of the unit case 26. The connecting cylinder 81 constitutes the air duct 49 that guides the temperature-controlled air from the air conditioner unit 20 to the upper outlet 31, the central outlet 32, and the foot outlet 33 and blows the air from the outlets 31 to 33 into the cabin. It is.
[0050]
As shown in FIG. 18 and the like, the air blowing guide 80 is attached to the control panel 12 by a pair of connecting projections 82 provided on the back side of the control panel 12. The connecting projection 82 is formed in a hook shape. When the opening of the air guide 80 along the longitudinal direction is pressed against the back surface side of the control panel 12, both edges 80a of the opening are on the side where the opening is widened. It covers the outside of the connecting projection 82 while elastically deforming, and when it enters the base of the connecting projection 82, it engages with this connecting projection 82 so that it can be prevented from coming off.
[Brief description of the drawings]
[Fig. 1] Side view of the entire agricultural tractor [Fig. 2] Left side view of the air conditioner unit installation portion [Fig. 3] Left side view of the air conditioner unit arrangement portion [Fig. [Fig. 5] Plan view of the air conditioner unit installation section [Fig. 6] Front view of the control panel [Fig. 7] Air conditioner piping diagram [Fig. 8] Rear view of the air conditioner unit [Fig. 9] Front view of the air duct [Fig. 11 is a perspective view of an air-conditioning unit. FIG. 11 is a perspective view of a blower duct main body and a control panel. FIG. 12 is a front view of an arrangement portion of a foot outlet. FIG. 13 is a cross-sectional view of an external duct. FIG. 15 is a front view of a blower duct of an air conditioner unit having another embodiment. FIG. 16 is a front view of an air conditioner apparatus having a blower duct having another embodiment. 17 d of FIG. Plan view of a configuration device Figure 18 is a cross-sectional view of the air flow guide EXPLANATION OF REFERENCE NUMERALS
11a Steering handle shaft 12 Steering panel 12b Steering panel portion 20 Air conditioner unit 31, 32, 33 Air outlet 44 Filter 49 Duct 66 Air conditioner operation panel 80 Air blowing guide

Claims (2)

An agricultural tractor with an air conditioning unit on the back of the control panel,
Below the steering handle shaft of the control panel, an air conditioner control panel having a width that is narrower than the left and right width of the control panel is attached closer to the center than the end position of the control panel in the left-right direction. In addition, the air conditioner operation panel includes an adjustment operation tool in which the adjustment operation direction is set to the left-right direction, and the adjustment operation area is disposed so as to overlap in the left-right direction with the location where the steering handle shaft is present. and it has wheels for farming. An agricultural tractor with an air conditioning unit on the back of the control panel,
An internal air intake for taking in the internal air of the air conditioner unit located in the internal space of the control panel is formed in the unit case of the air conditioner unit on the back side of the control panel provided in the driving cabin, While installing a filter that acts on the air conditioning air sucked by the air conditioning unit,
The control panel portion at a location facing the internal air inlet to which the filter is mounted is provided with a vent capable of taking the air in the driving cabin into the internal air inlet side, and the panel of the portion provided with this vent An agricultural tractor in which the part is configured as a separate part from the other control panel part located in the vicinity thereof and is detachably connected to the other control panel part.

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