JP2009227052A - Operation cabin of working machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To advantageously construct a suction duct in an operation cabin of a working machine equipped with a roof having an outer roof part and an inner roof part; an air-conditioning unit disposed between the outer roof part and the inner roof part in a portion of the roof adjacent to the front end of the cabin; and an outside air inlet port for air-conditioning disposed in a portion of the roof adjacent to the rear end of the cabin, while easily avoiding the sound generated by the flow of air sucked through the space between the inner roof part and the wall of the cabin, a gap in the inner roof part, or a mounting hole. <P>SOLUTION: The outer roof part 16a is provided with a hollow part 18. The hollow part 18 connects an inlet port 40 of the air-conditioning unit 31 and the outside air inlet port 32. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention includes a roof having an outer roof portion and an inner roof portion, an air conditioning unit provided at a cabin front end side portion of the roof and disposed between the outer roof portion and the inner roof portion, The present invention relates to an operating cabin of a work machine provided with an outside air intake for air conditioning provided at a rear end side portion of the cabin.

The above-described driving cabin enables air conditioning while ensuring good habitability and forward visibility.
That is, if the height of the inner roof portion in the vicinity of the driver's head is low, the operator can feel a sense of pressure. On the other hand, if an air conditioning unit provided at the front end of the cabin of the roof is used, the height of the inner roof is increased at the rear end of the cabin, so that the operator is less likely to feel pressure. The height near the head can be increased.
Moreover, when the length of the front eaves part of the roof becomes longer, the front eaves part tends to become an obstacle when looking forward upward. On the other hand, when the outside air intake provided in the rear end side portion of the cabin of the roof is employed, the length of the front eaves portion can be shortened so that the front eaves portion of the roof does not easily become a visual field obstacle.

Conventionally, for example, this type of operation cabin is described in Patent Document 1.
Patent Document 1 describes an agricultural tractor including a cabin (operating cabin). The cabin of this agricultural tractor includes an air conditioning unit housed in the front half of the inner roof portion of the roof portion, and an outside air intake provided in a rearward eave portion of the outroof portion of the roof portion.
JP 2005-1537 A

In this type of operation cabin, conventionally, a gap extending from the front end side to the rear end side of the roof is provided between the outer roof portion and the inner roof portion, and the air inlet of the air conditioning unit and the outside air intake port are communicated with each other by this gap. There was something. That is, there has been an air intake duct configured to suck the outside air into the air conditioning unit by the outer roof portion and the inner roof portion.
When this air intake duct is adopted, the air intake unit's intake force acts on the gaps or mounting holes generated or provided between the inner roof part and the cabin wall, or in the inner roof part, and the air inside the cabin becomes the gaps or mounting holes. It was apt to generate annoying sound that flows through.
Since the air conditioning unit and the outside air intake are separated from the front end side and the rear end side of the roof, the air intake power of the air conditioning unit easily acts on a wide area of the inner roof part, and the above-mentioned problems are likely to occur. .

  An object of the present invention is to provide an operating cabin of a work machine that can advantageously configure an intake duct but can easily avoid the above-described problems.

The first invention includes a roof having an outer roof portion and an inner roof portion, an air conditioning unit provided at a cabin front end side portion of the roof and disposed between the outer roof portion and the inner roof portion, In an operating cabin of a work machine having an outside air intake for air conditioning provided at a rear end side portion of the cabin of the roof,
The outer roof part is provided with a hollow part for communicating the air inlet of the air conditioning unit and the outside air inlet.

  According to the configuration of the first invention, the air conditioning unit sucks outside air from the outside air intake through the hollow portion of the outer roof portion. As a result, in order to cause the air conditioning unit to suck outside air, the outer roof portion can be used as an intake duct, and the air intake force of the air conditioning unit may or may not be applied to the inner roof portion. it can.

  Therefore, the outer roof portion can be advantageously used in terms of structure and economy, with the intake duct being used, but it is possible to perform quiet air conditioning that does not generate the air flow sound described at the beginning or is unlikely to occur. it can.

  In the second aspect of the present invention, a damper is provided that can be switched between an internal air circulation posture in which the internal air intake port of the inner roof portion communicates with the hollow portion and an external air intake posture in which communication of the internal air intake port to the hollow portion is cut off. is there.

  According to the configuration of the second aspect of the invention, when the damper is switched to the inside air circulation posture, the air conditioning unit sucks the inside air from the inside air intake through the hollow portion of the outer roof portion. Thus, in order to cause the air conditioning unit to suck in the inside air, it can be performed in a state in which the intake force of the air conditioning unit does not act on the inner roof portion or is difficult to act.

  Therefore, not only when air-conditioning is performed in the form of external air suction, but also when air-conditioning is performed in the form of internal air circulation, quiet air-conditioning that is difficult to occur or is not likely to occur is not generated. Can be made.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is an overall side view of a working machine according to an embodiment of the present invention. As shown in this figure, a working machine according to an embodiment of the present invention includes a pair of left and right steering operations and driveable front wheels 1, 1, a pair of left and right driveable rear wheels 2, 2, and a front of the vehicle body. A self-propelled vehicle is configured by including a driving section 4 having an engine 3 provided in the section and a driving section having a driving cabin 10, and the body frame 5 A pair of left and right lift arms 7, 7 provided on the upper part of the transmission case 6 constituting the rear part, and a power take-off shaft 8 protruding rearward from the transmission case 6 toward the vehicle body are configured.

  The tractor is configured such that a rotary tiller (not shown) is connected to the rear part of the vehicle body, and the rotary tiller is lifted and lowered by the lift arm 7, and the output of the engine 3 is transmitted from the power take-out shaft 8. A riding-type field cultivator is configured to transmit to a rotary cultivator. Thus, this tractor constitutes various riding-type work machines by drivingly connecting various working devices to the rear part of the vehicle body.

  As shown in FIG. 1, the operating cabin 10 is provided on the front side of the cabin frame 11 and a cabin frame 11 having a pair of left and right front column frames 11 a and 11 a and a pair of left and right side column frames 11 b and 11 b. Both the front transparent plate 12, the rear transparent plate 13 provided on the rear surface side of the cabin frame 11, the entrance door 14 made of transparent plates provided on both lateral sides of the cabin frame 11, and the cabin frame 11 A horizontal transparent plate 15 provided on the side of the lateral surface on the rear side of the vehicle body with respect to the entrance door 14 and a roof 16 provided on the upper part of the cabin frame 11 are provided.

  The pair of left and right entrance doors 14, 14 are pivotally supported by the lateral support frame 11 b and swing open and close around a vertical axis of the vehicle body located on the rear end side of the entrance door 14.

  FIG. 2 is a longitudinal side view of the operating cabin 10 at the roof disposition portion. As shown in this figure, the roof 16 is disposed on the upper and outer sides of the cabin frame 11 so as to constitute the roof of the operation cabin 10 and is supported by the upper end frame 11c of the cabin frame 11; The inner roof portion 16b is disposed on the inner side of the outer roof portion 16a and supported by the upper end frame 11c so as to form a ceiling in the driving cabin.

  As shown in FIGS. 2 and 3, the outer roof portion 16a is provided with a rear eaves portion 17 that is located at the rear end side portion of the cabin and protrudes from the upper end frame 11c to the rear side of the vehicle body. The outer roof portion 16a is manufactured by blow molding of a resin material, and has a hollow structure including a hollow portion 18 extending from the rear eaves portion 17 to a front end portion of the outer roof portion 16a.

  As shown in FIGS. 2 and 4, the inner roof portion 16 b includes a low ceiling portion 19 provided in a cabin front end portion thereof, and a high ceiling portion provided in a cabin rear end portion portion of the low ceiling portion 19. 20. The low ceiling portion 19 is disposed above the steering wheel 21. The high ceiling portion 20 is disposed above the driver seat 22 so that the ceiling height at the rear portion in the driving cabin is higher than the ceiling height at the front portion.

  As shown in FIG. 2, the operating cabin 10 includes an air conditioner 30 having an air conditioning unit 31 provided at the front end side of the cabin of the roof 16, and the inside of the operating cabin 10 is cooled and heated by the air conditioner 30. Air conditioning in the cabin is performed.

  FIG. 4 is a perspective view of the air conditioner 30 in an exploded state. As shown in FIG. 2 and FIG. 2, the air conditioner 30 includes the air conditioning unit 31, the outside air inlet 32 provided on the lower surface side of the rear eaves portion 17 of the outer roof portion 16 a, and the inner Inside air intake port 33 provided in the high ceiling portion 20 of the roof portion 16b, three front ejection ports 34 provided side by side in a cabin lateral direction in the low ceiling portion 19 of the inner roof portion 16b, and the inner roof It has a pair of left and right horizontal ejection openings 35, 35 provided in the high ceiling part 20 of the part 16b. The pair of left and right lateral ejection ports 35, 35 are displaced in the front-rear direction of the cabin so that one lateral ejection port 35 is located slightly behind the other lateral ejection port 35.

  The air conditioning unit 31 is disposed in an accommodation space formed between the low ceiling portion 19 and the outer roof portion 16a by the low ceiling portion 19 of the inner roof portion 16b and the outer roof portion 16a.

  As shown in FIG. 4, the air conditioning unit 31 includes a unit case 36, a rotary fan 37 provided on one end side in the operation cabin lateral direction inside the unit case 36, and the rotation inside the unit case 36. An evaporator 38 and a heater 39 arranged side by side in the fan 37 and the driving cabin, an intake port 40 provided in the top plate portion 36a of the unit case 36, and a side plate of the unit case 36 arranged side by side in the driving cabin. Three lower exhaust ports 42 and lateral exhaust ports 43 provided in the left and right lateral plate portions 36 b of the unit case 36.

  The three lower discharge ports 42 communicate with the three front ejection ports 34 of the inner roof portion 16b.

  The pair of left and right lateral exhaust ports 43, 43 are individually communicated with the pair of left and right lateral ejection ports 35, 35 of the inner roof portion 6b by a pair of air ducts 44, 44.

  The intake port 40 communicates with a front opening 45 provided on the cabin front end side of the hollow portion 18 of the outer roof portion 6a, and a damper 46 provided on the rear end side of the outer roof portion 16a is switched. Thus, the hollow portion 18 communicates with the outside air intake port 32 of the outer roof portion 16a and the inside air intake port 33 of the inner roof portion 16b.

  That is, as shown in FIG. 5, the damper 46 is swung around the shaft core P by the switching lever 47 that protrudes from the base portion of the damper 46 through the inner roof portion 16b and protrudes into the driving cabin, so that the outside air is taken in. And switch to the mixed posture and the inside air circulation posture.

  As shown in FIG. 5, the switching lever 46 is swung around the axis P to reach the outside air position A. Then, the damper 46 is in the outside air intake posture, and closes the inside air intake port 33 of the inner roof portion 16b communicated with the rear opening 48 provided on the rear end side of the hollow portion 18 of the outer roof portion 16a. The communication with the hollow portion 18 of the mouth 33 is cut off. The damper 46 in the outside air intake posture allows the rear portion 18a of the hollow portion 18 where the outside air intake port 32 is located to communicate with the front portion 18b located further forward of the cabin. Thus, the air inlet unit 40 of the air conditioning unit 31 is communicated with the outside air inlet 32 of the outside air inlet 32 and the inside air inlet 33 by the hollow portion 18.

  The switching lever 47 is swung around the axis P to reach the mixing position B. Then, the damper 46 assumes a mixed posture, and opens the inside air intake port 33 to communicate with the hollow portion 18. The damper 46 in the mixed posture causes the rear portion 18a and the front portion 18b of the hollow portion 18 to communicate with each other. Thus, the air intake unit 40 communicates with the outside air intake port 32 and the inside air intake port 33 through the hollow portion 18.

  The switching lever 47 is swung around the axis P to reach the inside air position C. Then, the damper 46 assumes the inside air circulation posture and opens the inside air intake port 33 to communicate with the hollow portion 18. The damper 46 in the inside air circulation posture blocks the rear portion 18a and the front portion 18b of the hollow portion 18 from each other. As a result, the air inlet unit 40 of the air conditioning unit 31 is communicated with the inside air inlet port 33 of the outside air inlet port 32 and the inside air inlet port 33 by the hollow portion 18.

  That is, the air conditioner 30 supplies the refrigerant from the refrigerant supply device (not shown) provided in the prime mover 4 to the evaporator 38 of the air conditioning unit 31 via the refrigerant circulation path 49 (see FIG. 4). 4 is supplied to the heater 39 of the air conditioning unit 31 via the hot water circulation path 50 (see FIG. 4), and the switching lever 47 is connected to the outside air position A and the mixing position B. And the inside air position C are switched to perform air conditioning in a form corresponding to the operation position of the switching lever 47.

  In other words, when the switching lever 47 is switched to the outside air position A, the damper 46 assumes the outside air intake posture and disconnects the inside air intake port 33 of the inner roof portion 16b from the hollow portion 18, while the outer roof portion 16a is hollow. The front part 18b and the rear part 18a of the part 18 are communicated. Accordingly, the air conditioner 30 causes the air intake unit 40 to communicate with the outside air intake port 32 through the hollow portion 18 of the outer roof portion 16a, and the air outside the operation cabin is blown by the rotating fan 37 of the air conditioning unit 31. Is sucked into the hollow portion 18 from the outside air intake port 32, and is sucked into the interior of the unit case 36 through the front opening 45 and the air intake port 40 from the hollow portion 18 and supplied to the evaporator 38 and the heater 39. And the heater 39 generate conditioned air whose temperature is adjusted to a set temperature, and supply the conditioned air from the front exhaust port 42 of the unit case 36 to the front jet port 34 of the inner roof portion 16b. 34 is jetted to the front part of the operation cabin, and the temperature-controlled air from the evaporator 38 and the heater 39 is unitized. Is supplied to the horizontal blowing mouth 35 of the inner roof portion 16b from lateral discharge port 43 of the over scan 36 through the air duct 44 is ejected from the lateral blowing mouth 35 to the rear of the driving cabin.

  When the switching lever 47 is switched to the mixing position, the damper 46 is in the mixing position to allow the front portion 18b and the rear portion 18a of the hollow portion 18 of the outer roof portion 16a to communicate with each other and the inside air of the inner roof portion 16b. The intake port 33 and the hollow portion 18 are communicated with each other. Thus, the air conditioner 30 causes the air intake unit 34 to communicate with the outside air intake port 32 and the inside air intake port 33 through the hollow portion 18 of the outer roof portion 16a, and the air blowing action by the rotary fan 37 of the air conditioner unit 31 is achieved. The air outside the operating cabin is sucked into the hollow portion 18 from the outside air intake port 32 and sucked into the unit case 36 through the front opening 45 and the intake port 40 from the hollow portion 18, and the evaporator 38 and the heater 39. The air in the operating cabin is sucked into the hollow portion 18 from the inside air intake port 33 and is sucked into the unit case 36 through the front opening 45 and the intake port 40 from the hollow portion 18 to the evaporator 38. Supply to the heater 39. That is, the air conditioner 30 mixes air from the outside of the operating cabin and air from the inside of the operating cabin to generate conditioned air whose temperature is adjusted to the set temperature, and this conditioned air is supplied from the front exhaust port 42 of the unit case 36. The air is supplied to the front ejection port 34 of the inner roof portion 16b and ejected from the front ejection port 34 to the front portion in the operating cabin, and the temperature-controlled air from the evaporator 38 and the heater 39 is supplied to the side of the unit case 36. The air is supplied from the discharge port 43 to the lateral ejection port 35 of the inner roof portion 16b through the air duct 44 and is ejected from the lateral ejection port 35 to the rear portion in the operation cabin.

  When the switching lever 47 is switched to the inside air position C, the damper 46 is in the inside air taking posture and shuts off the front part 18b and the rear part 18a of the hollow part 18 of the outer roof part 16a, while the inner roof part 16b. The inside air intake port 33 and the hollow portion 18 are communicated with each other. As a result, the air conditioner 30 causes the air inlet 31 of the air conditioning unit 31 to communicate with the inside air intake 33 through the hollow portion 18 of the outer roof portion 16 a, and the air in the operating cabin is blown by the rotating fan 37 of the air conditioning unit 31. Is sucked into the hollow portion 18 from the inside air intake port 33 and is sucked from the hollow portion 18 into the unit case 36 through the front opening 45 and the intake port 40 and supplied to the evaporator 38 and the heater 39. And the heater 39 generate conditioned air whose temperature is adjusted to a set temperature, and supply the conditioned air from the front exhaust port 42 of the unit case 36 to the front jet port 34 of the inner roof portion 16b. 34 is jetted to the front part of the operation cabin, and the temperature-controlled air from the evaporator 38 and the heater 39 is unitized. Is supplied to the horizontal blowing mouth 35 of the inner roof portion 16b from lateral discharge port 43 of the over scan 36 through the air duct 44 is ejected from the lateral blowing mouth 35. the rear of the driving cabin.

Overall side view of work equipment Longitudinal side view of the roof of the operating cabin Perspective view of the roof A perspective view of the air conditioner in an exploded state Longitudinal cross section at roof damper section

Explanation of symbols

16 Roof 16a Outer roof portion 16b Inner roof portion 18 Hollow portion 31 Air conditioning unit 32 Outside air inlet 33 Inside air inlet 40 Air inlet 46 Damper

Claims (2)

A roof having an outer roof portion and an inner roof portion; an air conditioning unit disposed between the outer roof portion and the inner roof portion in a cabin front end side portion of the roof; and a cabin rear end side of the roof An operating cabin of a working machine having an outside air intake for air conditioning provided at a site,
An operating cabin of a working machine, wherein the outer roof portion includes a hollow portion that allows communication between the air inlet of the air conditioning unit and the outside air intake.   The damper which can be switched to the inside air circulation attitude | position which connects the inside air intake port of the said inner roof part to the said hollow part, and the outside air intake attitude | position which cuts off the communication with respect to the said hollow part of the said inside air inlet part is provided. The operating cabin of the work equipment.

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