JP2014043241A - Arrangement structure of air conditioner in cabin of tractor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an arrangement structure of an air conditioner in a cabin of a tractor which can arrange an air conditioner in almost the same size as a living space of a conventional cabin, and prevents a car height from being increased.SOLUTION: In the arrangement structure of an air conditioner in a cabin of a tractor provided with: a seat 15 in a cabin 12; and an air conditioning duct 40 and an air conditioner 30 for adjusting air and sending the adjusted air to the duct being arranged in a roof 31 of the cabin, the air conditioner is provided as an indoor unit for air conditioning, a cabin frame constituting the cabin is formed by including left and right front support posts 13 and 13, left and right rear support posts 14 and 14, and a frame provided over upper end parts of the left and right front support posts and the left and right rear support posts to support the roof, and the air conditioner is arranged closer to a rear side of a machine body than to a seating part of the seat.

Description

  The present invention relates to the structure of a cabin of a tractor, and more particularly to an arrangement structure of an air conditioner such as an air conditioner or a ventilation fan arranged in a cabin.

  2. Description of the Related Art Conventionally, a technique for covering an operating part of a tractor with a cabin and providing an air conditioner such as an air conditioner or a ventilation fan in the cabin is known. For example, it is the technique of Unexamined-Japanese-Patent No. 5-147430 and Unexamined-Japanese-Patent No. 8-192620. In the former technique, an air conditioner was arranged in the center of the front and rear of the cabin ceiling, and an air intake was arranged on the rear surface of the cabin ceiling. In the latter technique, the air conditioner is arranged at the front position of the cabin ceiling, the air conditioner main body is located outside the cabin, and is disposed above the windshield, and the outside air intake of the air conditioner is provided on the side. It was done.

JP-A-5-147430 JP-A-8-192620

  However, in the former technology, there is an air conditioner on the ceiling. Sometimes did not fit within the height limits. In order to fit within this regulation value, the indoor space was reduced, the overhead clearance was reduced, and the comfortability was deteriorated. In the case of export specifications, a seat with a suspension may be mounted. In this case, the seat surface of the seat is raised, so the indoor space becomes smaller. To obtain the same indoor space, the domestic specification and the export specification are used. It was not possible to make a common cabin. In the latter technique, since the air conditioner is arranged on the front outside of the cabin, it is possible to keep the cabin space large by suppressing the height of the upper end of the cabin. When the front loader was installed, the work was difficult. In addition, since a part of the air conditioner is located on the ceiling in the front part, it sometimes becomes an obstacle when going into and out of the cabin.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

  According to claim 1, the seat (15) is provided in the cabin (12), the roof (31) of the cabin (12), the air-conditioning duct (40), and the duct ( 40) is an air conditioner arrangement structure in a cabin of a tractor in which an air conditioner (30) for sending the adjusted air is arranged, and the air conditioner (30) is provided as an indoor unit of an air conditioner, The cabin frame constituting the cabin (12) includes left and right front struts (13, 13), left and right rear struts (14, 14), left and right front struts (13, 13), and left and right rear struts (14). 14) and a frame provided over the upper end portion of the roof (31) to support the roof (31), and the air conditioner (30) from the seating portion of the seat (15) to the rear side of the body Place It is a certain thing.

  In claim 2, the seat (15) is provided in the cabin (12), the roof (31) of the cabin (12), the air conditioning duct (40), and the duct ( 40) An air conditioner arrangement structure in a cabin of a tractor in which an air conditioner (30) for feeding the adjusted air to 40) is arranged, wherein the air conditioner (30) is seated on the seat (15). The air conditioner (30) is provided as an indoor unit of an air conditioner, and the cabin frame constituting the cabin (12) is provided with left and right front struts (13, 13) and left and right A rear support column (14, 14), a left and right front support column (13, 13), and a frame provided over the upper ends of the left and right rear support columns (14, 14) to support the roof (31). prepare for The beam (32) disposed at the rear portion of the roof (31) is adjacent to the beam (32) at a height lower than the upper roof (41) of the roof (31). The bracket (33) is fixed to the beam (32) with the air conditioner (30) overlapping the beam (32) in a plan view. The air conditioner (30) is supported and fixed.

Since the present invention is configured as described above, the following effects can be obtained.
According to the present invention, the air conditioner can be arranged in substantially the same size as the conventional cabin living space, and the vehicle height does not increase. And since this air conditioner is not arrange | positioned on a head or a front part, it did not interfere with the forward visual field.
In addition, it is difficult to hear the noise emitted from the air conditioner.

In the case of export specifications, a seat with a suspension may be mounted. In this case, the seat surface of the seat is raised, so the indoor space becomes smaller. To obtain the same indoor space, the domestic specification and the export specification are used. Although it was not possible to make a common cabin, this problem can be solved.
Conventionally, since a part of the air conditioner is located on the ceiling of the front part, there is a case where it gets in the way when entering and exiting the cabin, but this problem can be solved.

It is a side view of the tractor equipped with the cabin. It is side view sectional drawing of a steering post attachment part. It is also a plan view. It is side surface sectional drawing of the upper rear part of a cabin. It is a top view of an air conditioner and a duct part. It is front sectional drawing of a duct part. It is side surface sectional drawing similarly. It is a plane sectional view of the corner of the cabin rear. It is a front view of a front support | pillar. It is a front schematic diagram which shows the state when closing a door. It is front sectional drawing of the 1st structural example of the fender contact part of a door. It is front sectional drawing of a 2nd structural example similarly. Similarly, it is a conventional front sectional view.

  Next, embodiments of the present invention will be described with reference to the accompanying drawings.

  First, the whole structure of the tractor equipped with the cabin 12 will be described with reference to FIG. Front wheels 2 and 2 are supported on the engine frame 1 via a front axle case, a transmission case 6 is disposed on the rear of the engine frame 1 via a clutch housing, and a rear axle case is provided on both sides of the transmission case 6. Rear wheels 3.3 are supported. The work machine can be mounted on the rear part of the mission case 6 via a work machine mounting device including a top link, a lower link, and the like. Further, a front wheel drive output shaft projects forward from the front lower portion of the transmission case 6 so that the front wheels 2 and 2 can be driven via a universal joint, a transmission shaft, and the like.

  An engine 5 is mounted on the engine frame 1, and the engine 5 is covered with a bonnet 4. A dashboard 11 is disposed at the rear of the bonnet 4, an operation panel 18 and a steering handle 19 are disposed on the dashboard 11, and a seat 15 is disposed behind the dashboard 11. The operation unit is configured to be covered by the cabin 12. The cabin 12 is a cabin frame. The front column 13 is erected from the engine frame 1 and the rear column 14 is erected from the transmission case 6. The beam is horizontally installed on the upper part, the ceiling is covered by the roof 31, and the front side is the front. Glass, side surfaces are covered with doors 50 and 50, and the rear surface is covered with rear glass 35. Further, a direction indicator 9 is provided below the rear column 14.

  The steering shaft of the steering handle 19 passes through the dashboard 11 and is supported on the cabin floor 21 via the vibration isolating member 20, and noise from the power steering hydraulic pressure switching unit 22 connected to the lower end of the steering shaft is generated. It is difficult to be transmitted to the cabin 12.

  That is, as shown in FIGS. 2 and 3, the cabin floor 21 is fixed to the machine, and the cabin floor 21 has an opening 21a that allows the power steering hydraulic pressure switching unit 22 to be inserted. ing. The rear part of the cabin floor 21 is covered with a step cover 28. The guide pipes 23, 23, 23 are fixed on the cabin floor 21 by bolts 29, 29, 29, and the outer periphery of the guide pipes 23, 23, 23 is formed of rubber or the like. 20 and 20 are fixed to each other. However, the guide pipes 23, 23, and 23 can be fixed on the cabin floor 21 by welding or the like.

  On the other hand, the handle shaft is housed in the steering post 24, a base plate 25 is fixed to the lower end of the steering post 24, and a power steering hydraulic pressure switching unit 22 is fixed to the lower surface of the base plate 25. A handle shaft is connected and fixed to the input shaft of the hydraulic pressure switching unit 22. The power steering hydraulic pressure switching unit 22 switches the oil passage in accordance with the amount of rotation of the steering handle 19 and feeds the pressure oil to a power steering cylinder (not shown). The power steering cylinder rotates the front wheel 2 to operate it. The direction handle 19 can be turned by turning in the turning direction. Connection pipes 26, 26, and 26 are erected on the base plate 25, and the connection pipe 26 is formed of a cylindrical body having an inner diameter capable of fitting the guide pipe 23 and the vibration isolation member 20.

  Thus, the power steering hydraulic pressure switching unit 22 is fixed to the steering post 24 via the base plate 25, and the connecting pipe 26 fixed to the base plate 25 is erected on the cabin floor 21 via the vibration isolation member 20. It is connected to the pipe 23. That is, the steering unit such as the steering handle 19, the handle shaft, and the power steering hydraulic pressure switching unit 22 is attached to the machine via the vibration isolation member 20. A seal member 27 is interposed between the cabin floor 21 and the base plate 25 to prevent waterproofing and noise leakage.

  By configuring as described above, the power steering hydraulic pressure switching unit 22 is conventionally housed in the engine room, and the power steering hydraulic pressure switching unit 22 is operated from the steering handle via a universal joint or the like. In models with a large engine room, there was space for placement, but in compact models with small storage space, the power steering hydraulic switch unit 22 had to be placed under the steering column (dashboard), which caused problems such as noise and vibration. However, noise and vibration generated from the power steering hydraulic pressure switching unit 22 are absorbed by the vibration isolating member 20, and transmission of noise and vibration into the cabin 12 is reduced. It is. Further, since there is no gap, entry of dust and the like can be prevented.

  Further, the power steering hydraulic pressure switching unit 22 and the handle shaft are connected by spline fitting. However, since the power steering hydraulic pressure switching unit 22 is fixed to the steering post 24, play at the spline fitting portion is reduced. As a result, wear due to vibration is reduced, the life is extended, and the number of maintenance can be reduced.

  An air conditioner 30 is disposed at the upper outer rear portion of the cabin 12. In this embodiment, the air conditioner 30 is an indoor unit of an air conditioner. In addition, a ventilation fan etc. may be sufficient. As shown in FIGS. 4 and 5, the air conditioner 30 is housed in a portion that extends rearward from the rear columns 14 and 14 and covers the roof 31 that covers the ceiling of the cabin 12, and straddles the inside and outside of the cabin 12. It is arranged. The rear end of the roof 31 is positioned forward of the rear end of the rear wheel 3 so that the total length does not become longer.

  The mounting structure of the air conditioner 30 is such that a beam 32 is installed between the upper portions of the rear struts 14 and 14, and a bracket 33 having a U-shape in plan view projects from the left and right middle portions of the beam 32 to the rear. A front portion of the air conditioner 30 is placed and fixed on the beam 32, and a side surface and a rear portion of the air conditioner 30 are supported and fixed by a bracket 33. At this time, the air conditioner 30 is disposed so as to incline from the front to the rear and to the low, making the front and rear length as short as possible and facilitating the drain water to flow down rearward and downward.

  The lower cover 34 that covers the lower surface of the air conditioner 30 outside the cabin 12 is provided with an opening 34b for introducing outside air, and the intake portion of the air conditioner 30 introduces outside air and room air (not shown). A switching device for switching the circulation is provided. Since the hinge 36 of the rear glass 35 of the cabin 12 is disposed at the front end of the lower cover 34, a recess 34a is formed in order to avoid interference between the two.

  Thus, the air conditioner 30 is provided on the rear ceiling of the cabin 12, the discharge port 30 a of the air conditioner 30 is arranged facing the cabin 12, and the main body of the air conditioner 30 is arranged not to be located inside the cabin 12. Thus, the ceiling height inside the cabin 12 is increased so that the indoor space is not reduced. And since the suction side of the air conditioner 30 is located outside the cabin 12, it is possible to easily take in outside air. Further, since the air conditioner 30 is inclined, the condensed water generated at the time of cooling can be easily discharged from the rear side of the cabin 12 so as not to enter the cabin 12.

  In addition, as shown in FIGS. 4, 5, and 6, the air discharge port 30 a of the air conditioner 30 is disposed at a position overlapping the rear strut 14 in a side view and faces the cabin 12. Yes. Note that FIGS. 5 and 6 are configured substantially symmetrically so that only the left and right sides are shown.

  The duct 40 communicates with the air discharge port 30a of the air conditioner 30. The duct 40 is formed between the upper roof 41 and the inner roof 42 of the cabin 12, and the inner roof 42 is formed with a groove-shaped recess (or projection) by injection molding or the like of synthetic resin, whereby the upper roof 41 and the inner roof 42 are formed. A duct 40 is formed between 42.

  That is, the duct 40 is formed by inflating the inner roof 42 downward from the state in which the upper roof 41 and the inner roof 42 are combined, and as shown in FIG. It is divided into two forks from the 30a portion, bent to the left and right sides, then bent forward and extended to form a substantially U shape in plan view.

  As shown in FIGS. 5 and 7, a plurality of outlets are provided on the lower surface of the duct 40. In this embodiment, there are provided a defroster outlet 42a opened at the front part for preventing windshields from fogging and the like, and an operator outlet part 42b opened in the middle part for directing air to the operator. The defroster outlet 42a and the operator outlet 42b are provided with wind direction bodies 49 and 49 that can change the direction of the wind. It can also be made to do. Further, in the present embodiment, the number of outlets is two for one duct, but it is also possible to provide three or more outlets.

  A partition plate 43 is provided in the duct 40 between the defroster outlet 42a and the operator outlet 42b so that the amount of air blown from the defroster outlet 42a and the operator outlet 42b is substantially equal. ing. In this embodiment, a plate-like partition plate 43 is obliquely projected on the inner roof 42 in the duct 40, but the partition plate 43 may be protruded from the upper roof 41. Further, by changing the position, angle, and size of the partition plate 43, the ratio of the amount of air flowing out from the defroster outlet 42a and the operator outlet 42b can be changed.

  With this configuration, the air conditioner 30 is located outside the cabin 12, the duct 40 is located on both the left and right sides of the ceiling inside the cabin 12, and the overhead is conventional when the operator is seated on the seat 15. A substantially equivalent height can be obtained. And the wind of the air conditioner 30 can be blown out from the duct 40 toward an operator and a windshield, and the temperature, humidity, etc. in the cabin 12 can be adjusted.

  Also, as shown in FIG. 8, a space is formed between the duct 40 and the corner of the cabin on both the left and right sides of the ceiling of the cabin 12, and an air intake 44 from the room is formed in this space portion. The intake port 44 is provided with a filter 45 and communicates with the air intake port of the air conditioner 30. In addition, a member 46 for filling a gap is disposed between the inner roof 42 and the upper roof 41 so as to prevent outside air from being taken in. Further, hoses 47 and 48 for sending the refrigerant of the air conditioner 30 are inserted between the inside or outside of the rear column 14 and the inner panel.

  Further, as shown in FIGS. 9 and 10, the front strut 13 of the cabin frame is formed in a “<” shape that is recessed inwardly so that the door 50 on the side is closely closed. Yes. That is, the front strut 13 is bent outwardly from an approximately vertical center portion (L1 = L2) in an angle α “<” shape in a front view, and the receiving portion of the lock device 51 of the door 50 is bent at the bent portion 13a. Is arranged. The door 50 is made of a single transparent glass plate, and is pivotally supported on the rear column 14 by a hinge 52 serving as a pivotal pivot at the rear (FIG. 1), and the front is closed by a lock device 51. It can be locked with. The bending angle α is set within an angle that allows the glass constituting the door 50 to return to its original state even when the glass is elastically deformed. In other words, it is within an angle that does not reach the elastic limit.

  The reason for bending into a "<" shape is that an error is inevitably generated when the cabin 12 is assembled. Therefore, if the "<" shape is not configured as described above, the door 50 configured as a flat plate is attached to the cabin frame. When it is attached and closed, a gap is inevitably formed due to an error. Since this gap has a large error especially at both ends, a gap is generated at the end of the door 50, noise is generated by vibration during running and work, a draft is entered in winter, and the cooler is not effective in summer. Etc. had occurred. Conventionally, in order to fill this gap, a seal member such as rubber is arranged at the contact portion with the door around the cabin frame. However, the thickness of the seal member is limited, and all gaps can be filled. In some cases, it was not possible.

  However, as described above, when the front support 13 is formed in a “<” shape when viewed from the front, when the door 50 is closed, the upper and lower ends of the door 50 are in contact with the front support 13, and the door 50 The upper and lower centers of the door 50 are locked in a state of being elastically deformed by being attracted to the front column 13, so that the door 50 is not elastically deformed and damaged by excessive force, and the upper and lower sides and the center of the door 50 are in close contact with the front column 13. As a result, no gap is generated. Moreover, the play between the door 50 and the front support 13 can be eliminated. Reference numeral 56 denotes a seal member.

  In addition, a gap is easily formed between the door 50 and the fender 54. For example, as shown in FIG. 13, conventionally, a square pipe-shaped contact body 55 is fixed by welding on a fender 54 ′, and a seal member 56 is pasted on the outer surface of the contact body 55. However, when the contact body 55 is welded onto the fender 54 ′, welding distortion occurs, and a gap is formed in a portion where the distorted contact body 55 contacts the flat door 50.

  Therefore, in the contact portion where the rear lower inner surface of the door 50 abuts against the fender 54, a rising portion is formed on the fender 54, and the contact portion 54a is provided on the fender 54 so that the position of the rising portion does not change during molding. It is integrally molded. That is, the fender 54 is made of a synthetic resin or the like, and a vertical surface (rising portion) is formed on the fender 54 to form the contact portion 54a so that the lower inner surface of the door 50 contacts. In order to further improve the sealing performance, a seal member 56 is attached to the fender 54 or the door 50 at the contact portion between the door 50 and the fender 54.

  As shown in FIG. 11, the fender 54 can be divided into an inner fender 54IN and an outer fender 54OUT as shown in FIG. 11, and a vertical surface is formed on the side portion of the inner end of the outer fender 54OUT. The abutting portion 54a is formed, and an end portion is formed with a fitting portion 54b having a "U" shape in sectional view. Then, at the time of assembly, the fitting portion 54b is inserted into the outer end side of the inner fender 54IN. Moreover, as shown in FIG. 12, as a second configuration example, a fender 54 in which the contact portion 54a is integrally formed may be used.

  With this configuration, when the abutment portion 54a of the fender 54 is made of synthetic resin, it is formed by injection molding or the like, and in the case of metal, it is integrally bent by pressing or the like. In other words, the error caused by the bonding is eliminated, and the gap between the contact surface between the door 50 and the fender 54 can be eliminated.

3 Rear wheel 12 Cabin 14 Rear strut 30 Air conditioner 31 Roof 34 Lower cover 34a Recess 35 Rear glass 36 Hinge

Claims (2)

The seat (15) is provided in the cabin (12), the roof (31) of the cabin (12) is adjusted to the air conditioning duct (40), and the air is adjusted to the duct (40). An air conditioner arrangement structure in a cabin of a tractor in which an air conditioner (30) for sending air is arranged,
The air conditioner (30) is provided as an indoor unit of an air conditioner,
The cabin frame constituting the cabin (12) includes left and right front struts (13, 13), left and right rear struts (14, 14), left and right front struts (13, 13), and left and right rear struts (14). A frame provided over the upper end of 14) to support the roof (31);
The arrangement structure of the air conditioner in the cabin of the tractor, wherein the air conditioner (30) is arranged behind the seat of the seat (15). The seat (15) is provided in the cabin (12), the roof (31) of the cabin (12) is adjusted to the air conditioning duct (40), and the air is adjusted to the duct (40). An air conditioner arrangement structure in a cabin of a tractor in which an air conditioner (30) for sending air is arranged,
The air conditioner (30) is disposed on the rear side of the body from the seating portion of the seat (15),
The air conditioner (30) is provided as an indoor unit of an air conditioner,
The cabin frame constituting the cabin (12) includes left and right front struts (13, 13), left and right rear struts (14, 14), left and right front struts (13, 13), and left and right rear struts (14). A frame provided over the upper end of 14) to support the roof (31);
The left and right rears adjacent to the beam (32) at a height position where the beam (32) disposed at the rear portion of the roof (31) is one step lower than the upper roof (41) of the roof (31). Installed over the struts (14, 14),
The air conditioner (30) is supported and fixed to a bracket (33) fixed to the beam (32) in a state where the air conditioner (30) overlaps the beam (32) in a plan view. The arrangement structure of the air conditioner in the cabin of the characteristic tractor.

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