JP3164979B2 - Air conditioner for tractor with cabin - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner for a tractor with a cabin.

[0002]

2. Description of the Related Art Some tractors have a cabin mounted on a transmission case, and the tractor with the cabin generally has an air conditioner in order to keep the temperature, humidity, etc. of indoor air in a comfortable state. Provided. When the air conditioner unit including the evaporator of the air conditioner is provided in the roof of the cabin, the ceiling portion largely advances to the indoor side,
Japanese Unexamined Patent Publication No. Hei 3-276885 discloses a device provided below the driver's seat because it impairs habitability.

[0003]

In the above-mentioned prior art, since the air conditioner unit is disposed between the floor panel and the driver's seat, the driver's seat becomes higher and the head clearance (between the driver's head and the driver's head) increases. There is a problem that the gap between the ceiling and the ceiling becomes small. Further, the conventional air conditioner unit is configured so that air in the cabin is introduced,
When the outside air is not introduced into this air conditioner unit and the outside air is introduced into the air conditioner unit, the air conditioner unit is provided at the lower part of the cabin in the conventional air conditioner. If an outside air inlet is provided in the vicinity, there is also a problem that outside air below the cabin with much dust is introduced.

In this case, the outside air inlet may be provided in the roof as in the case where the air conditioner unit is provided in the roof. However, a separate duct is required between the outside air inlet and the air conditioner unit. Since the space inside and outside is narrow, it is difficult to arrange the duct. In view of the above problems, the present invention provides an air conditioner unit having a built-in evaporator at the lower part of the cabin without increasing the driver's seat, and also enables the introduction of outside air from the upper part of the cabin with less dust. It is an object of the present invention to provide an air conditioner that does not require a separate duct.

[0005]

The technical means taken by the present invention to achieve the above object is that a cabin 7 is mounted on a transmission case 4 constituting a tractor vehicle body 1 and the cabin 7 is mounted on the lower left and right sides of the cabin 7. , A fender 14 that covers the left and right rear wheels, a driver's seat 23 is arranged between the left and right fenders 14, a roof 19 of the cabin 7 is provided with an outside air inlet 21,
In a tractor with a cabin provided with an intermediate support 11 between a fender 14 and a roof 19, an air conditioner unit 33 having a built-in evaporator is connected to a transmission case 4 below a driver's seat 23.
And the fender 14, the intermediate column 11 is formed in a hollow shape and its upper end opening communicates with the outside air inlet 21, and the lower end opening of the intermediate column 11 and the air conditioner unit 33 communicate with the fender 14. The air conditioning unit 33 is provided with a reinforcing member 34 that constitutes a duct that is connected to the outside air from the outside air inlet 21 through the reinforcing member 34 through the intermediate column 11.
The point is that it is configured to be introduced.

The air conditioner unit 33 is connected to the cabin 7.
It is good to fix it on the side. Further, it is preferable to provide an inside air introduction port 32 for introducing room air on the inside of the cabin inside the intermediate column 11 through which outside air flows.

[0007]

The air conditioner unit 33 is disposed between the transmission case 4 and the fender 14 below the driver's seat 23. Even if the air conditioner unit 33 is provided at the lower part of the cabin 7, the driver's seat 23 is not raised, and the comfort is improved. Is improved, and the reinforcing member 34 of the intermediate support 11 and the fender 14 is used as a duct. Therefore, even if the outside air is introduced from the outside air introduction port 21 provided in the roof 19, no separate duct is required.
There is no need to arrange a duct in a narrow place between the fender 14 and the vehicle body 1.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 3, reference numeral 1 denotes a tractor body.
The engine 2, the flywheel housing 3, and the transmission case 4 are directly connected, and the main configuration is provided. The transmission case 4 is formed by directly connecting the clutch housing 5 and the transmission case 6, and a cabin 7 is mounted on an upper portion thereof. . The cabin 7 has a cabin frame 8 forming a skeleton. The cabin frame 8 has a front support 9, a rear support 10, and an intermediate support 11 therebetween on both the left and right sides. An upper main frame member 12 having a U-shape in a front opening and welded and fixed to an upper end portion of the upper frame 11 and an upper front frame member 13 for connecting between upper ends of the front struts 9 are provided.

Fenders 14 are provided on the left and right sides of the rear lower portion of the cabin frame 8 to cover the left and right rear wheels. A U-shaped lower frame member 15 is fixed from the upper surface of the left and right fenders 14 to the lower front surface thereof. The lower frame member 15 is welded and fixed to lower ends of the rear support 10 and the intermediate support 11. A reinforcing frame 16 along the rear edge and the lower edge is welded and fixed to the inside of the side surface of the left and right fenders 14, and the rear upper and front portions of the reinforcing frame 16 are welded and fixed to the lower frame 15. .

At the upper end of the cabin frame 8, a roof 19 having a hollow shape comprising an outer roof 17 on the outdoor side and an inner roof 18 on the indoor side is mounted and fixed, and a steel plate is formed on the bottom of the cabin frame. Floorboard 20
Is stretched. The rear portion of the outer roof 17 protrudes outward from the upper main frame member 12, and an outside air inlet 21 is opened on the lower surface on the right side of the projecting portion.
Is closed by the filter 22.

The rear portion of the floor plate 20 is formed one step higher, and a driver's seat 23 located between the left and right fenders 14 is fixedly mounted on the rear portion of the floor plate 20. A steering device 24 is disposed in front of the driver's seat 23. An interior cover 25 is provided on the front side of the steering device 24 to cover a wiring, a mounting portion of the steering device 24, and an instrument panel. I have. A blow-off grill 26 for discharging conditioned air is provided on the front portion of the upper wall portion of the interior cover 25 and on both left and right side wall portions.

The lower ends of the left and right front ends of the cabin 7 are fixed to brackets 27 fixed to the front lower portions on both left and right sides of the clutch housing 5 via vibration isolating rubber. The plate 28 is fixed by welding, and the mounting plate 28 is fixed to a bracket 30 fixed to a rear axle case 29 protruding to the rear left and right sides of the transmission case 6 via a vibration isolating rubber. 7 is supported by the vehicle body 1.

A windshield is provided between the left and right front supports 9, a door is provided between the front support 9 and the intermediate support 11, a side glass is provided between the intermediate support 11 and the rear support 10, and a left and right rear support 10 is provided. Rear glass is fitted between the two. The left and right intermediate pillars 11 connect the upper main frame member 12 and the lower frame member 15 and have an open U-shaped rigid member 11a formed inside the cabin room and an open U-shaped member formed outside the cabin room. An interior material 11b is formed and fixed so as to close the open side of the rigid material 11a, and is formed into a vertically open cylindrical body. The upper end of this intermediate support 11 is the inner roof 1
8 and the upper end opening of the intermediate support 11 is
9 communicates with the inside. The lower end of the intermediate support 11 is in contact with the upper surface of the fender 14, and a communication hole 31 communicating with the lower end opening of the intermediate support 11 is formed through the upper wall of the fender 14. Further, a suction grille (inside air introduction port) 32 for introducing air (inside air) in the cabin room is provided above the interior material 11b. A filter made of sponge or the like is provided on the inner side of the grill 32.

An air conditioner unit 33 including an evaporator and a blower is disposed between the lower part of the right fender 14 and the transmission case 6 below the driver's seat 23 and the floor plate 20. It is attached and fixed to the inner surface of the fender 14 by bolts or the like. The compressor and the condenser are arranged in a hood covering the engine, the radiator and the like, and a pipe connecting the compressor, the condenser and the air conditioner unit 33 is arranged on the right side of the vehicle body 1 below the floor plate 20. Further, the air conditioner unit may be used for cooling, but may be a unit having a built-in heat exchanger or heater that uses engine cooling water as a heat source.

Reinforcing members 34 are provided on the outer surfaces of the left and right fenders 14 along the fenders 14 from the position corresponding to the lower end of the intermediate support 11 to the mounting plate 28 on the lower surface of the upper wall portion of the fenders 14. This reinforcing member 34
As shown in FIG. 4, a fixing portion 34b fixed to the outer surface of the fender 14 protrudes from both end edges of the main portion 34a having a U-shaped cross section, and is formed so as to form a duct 35 therein. The upper opening of the duct is closed by a plate, and the lower opening of the duct is closed by a mounting plate 28.

Below the left and right fenders 14, reinforcing members 3 are provided.
An opening 36 communicating with a duct 35 formed by the air conditioning unit 4 is formed, and the opening 36 of the right fender 14 is connected to the air conditioning unit 33 via a duct 37 integrated with a case of the air conditioning unit 33. Therefore, the outside air taken in from the outside air inlet 21 of the roof 19 is sucked by the blower of the air conditioner unit 33, passes through the intermediate column 11, enters the duct 35 formed by the reinforcing member 34 from the communication hole 31, and from there. The air is introduced into the air conditioner unit 33 through the opening 36 and the duct 37.

Further, the room air taken in from the grill 32 of the right intermediate support 11 is also introduced into the air conditioner unit 33 in the same manner as described above. The outside air inlet 21 and the grill 32 are openable and closable, and the air conditioner is freely switchable between an outside air introduction type and an inside air circulation type. The air conditioner unit 33 includes a duct 3 integrated with the case of the unit 33.
8 protrudes to the left, and this duct 38 communicates with the air-conditioning air outlet of the unit 33. Also, this duct 3
A grill 39 communicating with 8 is provided on a vertical wall portion at the front and rear intermediate portion of the floor plate 20, from which conditioned air is blown forward.

Another duct 40 is connected to the duct 38, and this duct 40 is branched into two on the way, one of which is the opening 36 of the left fender 14, the inside of the reinforcing member 34, the communication hole 31, and the left middle. It passes through the inside of the support 11 and is connected to a grill 41 provided on the interior material 11b of the left intermediate support 11, and the grill 41 blows out conditioned air into the cabin room. The other side of the duct 40 is the floor plate 2
0, passes through the left side of the vehicle body 1 and reaches the inside (front side) of the interior cover 25, where it further branches to form the interior cover 2
5 is connected to the grill 26, and the conditioned air is blown from the grill 26 into the cabin room.

As shown by phantom lines in FIGS. 1 and 2, an outside air inlet and a filter may be provided on the left side of the outer roof 17. Further, the reinforcing member 34 may be formed of a tubular material. FIG. 5 shows a transmission lever device 42 and a parking brake device 43 of the tractor. The tractor employs a system in which a shift shifter of a transmission constituted by a full synchromesh and a hydraulic clutch is operated by hydraulic pressure, and the shift is performed by rotating a shift lever 44 around a pivot at a lower end. I can do it.

A position next to the neutral position of the shift lever 44 is a parking position, and a projection 47 is provided between the neutral position and the parking position in the guide groove 46 of the guide plate 45 for guiding the shift lever 44. ing. Further, the shift lever device 42 is moved from the parking position to the protrusion 4.
7 is provided with a leaf spring 48 for urging the shift lever 44 so as not to be inadvertently moved toward the neutral position.

The parking brake device 43 mainly includes a lock arm 49 made of a bar and a support cylinder 50 rotatably supported in the transmission case 4. The support cylinder 50 is opposed to the lock arm 49. It is rotatably fitted to the outside. The lock arm 49 includes an engaging portion 52 that meshes with a gear of a traveling system (for example, a power take-out gear for taking out power from the front of the rear wheel differential device to the front wheel differential device) 51 and a lever portion 5.
3 are bent. In addition, the support cylinder 50 includes
An arm 54 and a lever 53 of the lock arm 49
The arm portion 54 is engaged with a tension spring 56 that urges the engaging portion 52 of the lock arm 49 to be disengaged from the gear 51, and the arm portion 54 The lever 44 is interlocked and connected via a wire 57. A torsion coil spring 58 is fitted over the support cylinder 50, and one end of the spring 58 is hooked on the arm 54 of the support cylinder 50, and the other end is hooked on the lever 53 of the lock arm 49. Thus, the engagement portion 52 of the lock arm 49 is urged to mesh with the gear 51.

Therefore, when the shift lever 44 is set to the parking position, the arm portion 54 is pulled by the wire 57, the support cylinder 50 is rotated in the direction of arrow A, and the lock arm 49 is biased by the torsion coil spring 58. When rotated, the engagement portion 52 meshes with the gear 51, and the traveling system of the transmission is locked. At this time, if the engaging portion 52 comes into contact with the end face of the gear 51 and does not mesh therewith, the gear 51
When they slightly move, they mesh.

When the shift lever 44 is moved from the parking position to the neutral position and the shift position, the pulling force of the wire is released, and the support cylinder 50 is rotated by the spring 56 in the direction opposite to the direction A. Lock arm 4
9 is pushed by the lever portion 55 of the support cylinder 50, and the lock arm 49 is also rotated.
Is forcibly separated from the gear 51.

[0024]

According to the present invention, the air conditioner unit 33 including the evaporator is connected to the transmission case 4 below the driver's seat 23.
And the fender 14, the intermediate column 11 is formed in a hollow shape and its upper end opening communicates with the outside air inlet 21, and the lower end opening of the intermediate column 11 and the air conditioner unit 33 communicate with the fender 14. The air conditioning unit 33 is provided with a reinforcing member 34 that constitutes a duct that is connected to the outside air from the outside air inlet 21 through the reinforcing member 34 through the intermediate column 11.
When the air conditioner unit 33 is provided at the lower part of the cabin to improve comfort, the driver's seat 23 does not need to be high, and the outside air in the upper part of the cabin, which is relatively dust-free, can be introduced. A tractor with a cabin that can be provided, and the reinforcing member 34 of the intermediate support 11 and the fender 14 is used as a duct, so that there is no need to provide a separate duct, and a narrow space between the fender 14 and the body 1 can be provided. There is an effect that it is not necessary to consider the arrangement of the duct.

The air conditioner unit 33 is connected to the cabin 7
The air conditioner unit 33
Vibrates together with the cabin 7, so that it is not necessary to consider the difference in vibration between the cabin 7 and the tractor body 1 when connecting the reinforcing member 34 and the air conditioner unit 33. Further, since the intermediate support 11 is used as a duct for introducing outside air to the air conditioner unit 33, an inside air inlet 3 for introducing indoor air is provided on the inner side of the intermediate support 11 in the cabin room.
It is possible to configure to circulate the indoor air only by providing 2.

[Brief description of the drawings]

FIG. 1 is a front sectional view of a tractor with a cabin.

FIG. 2 is a perspective view of a cabin.

FIG. 3 is a side view of a tractor with a cabin.

FIG. 4 is a plan sectional view of a reinforcing member.

FIG. 5 is a schematic view of a shift lever device and a parking brake device.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 vehicle body 4 transmission case 7 cabin 11 intermediate support 14 fender 19 roof 21 outside air inlet 23 driver's seat 33 air conditioner unit 34 reinforcing member

Claims (3)

(57) [Claims] 1. A cabin (7) is mounted on a transmission case (4) constituting a tractor body (1), and a fender (14) covering left and right rear wheels is provided at a lower portion on both left and right sides of the cabin 7. The driver's seat (2 between the left and right fenders (14)
3) is arranged, a roof (19) of the cabin (7) is provided with an outside air inlet (21), and a fender (14) and a roof (1) are provided.
9) A tractor with a cabin provided with an intermediate column (11) between the air conditioner unit (33) having a built-in evaporator and a transmission case (4) below a driver's seat (23) and a fender (14).
And an intermediate column (11) is formed in a hollow shape, the upper end opening of which is communicated with the outside air inlet (21), and the lower end opening of the intermediate column (11) is connected to the fender (14). A reinforcing member (34) constituting a duct communicating with the unit (33) is provided, and the outside air from the outside air inlet (21) is supplied from the intermediate support (11) via the reinforcing member (34) to the air conditioning unit (33). An air conditioner for a tractor with a cabin, wherein the air conditioner is configured to be installed in a tractor. 2. The air conditioner unit (33) is connected to the cabin (7).
The air conditioner for a tractor with a cabin according to claim 1, wherein the air conditioner is mounted and fixed to the side. 3. An inside air inlet (32) for introducing room air into the cabin chamber of the intermediate column (11) through which outside air is circulated.
A tractor-equipped tractor air conditioner according to claim 1.