JP5296333B2 - Work machine - Google Patents

Description

  The present invention relates to a work machine, and more particularly, to a work machine including a defrost device for defrosting a window provided in a front portion of a cab.

Generally, a work machine is provided with a cab in which a cockpit is disposed. This cab is provided with a defrost device for removing fogging and freezing of the window on the front side. When the window is fogged, warm air generated by the defrost device passes through the duct. It blows out toward a window from the blower outlet provided in the lower part of the window (refer patent document 1). Here, the defrost device is housed in the lower part of the cockpit, and a duct for conveying warm air is disposed along the floor surface in the cab.
JP 2001-207480 A

  However, when the duct is disposed on the floor as described above, it is an obstacle for an operator seated in the cockpit. In addition, when the duct is arranged so that it passes under the floor so that the duct does not get in the way, it is necessary to provide heat insulation in the duct to prevent heat exchange between the air inside the duct and the outside air Cost increases.

  An object of the present invention is to provide a defrosting facility in a work machine so that a duct does not get in the way and the cost is low.

A work machine according to a first invention includes a cab, a pillar, a beam portion, a cockpit, a defrost device, a defrost blowing portion, and a defrost duct. The cab includes a front surface portion provided with a window, a rear surface portion, left and right side surface portions, and a ceiling portion. The pillar extends in the vertical direction along a corner between the rear surface portion and the side surface portion of the cab. The beam portion is disposed extending forward from the upper end portion of the pillar. The cockpit is located in the cab. The defrost device is disposed behind the cockpit and generates warm air. The defrost blowing part is provided above the front window and is a part for blowing the warm air generated by the defrost device toward the front window. The defrosting duct has a first defrosting duct and a second defrosting duct, and conveys warm air generated by the defrosting device to the defrosting outlet. The first defrost duct is connected to the defrost device, and is arranged to extend in the vertical direction along the pillar at the corner between the rear surface portion and the side surface portion of the cab, and is transported from the defrost device to the defrost blowing portion. Through the air. The second defrost duct includes a rear portion and a front portion. The rear portion is connected to the first defrost duct portion and is disposed so as to extend forward along the beam portion from the upper end portion of the first defrost duct portion. Front portion is positioned from the front end of the rear portion so as to extend along the lateral direction, Ru is connected to the defrost unit. The 2nd defrost duct is arrange | positioned along the ceiling part, and the air conveyed from a defrost apparatus to a defrost blowing part passes.

  In this work machine, the defrost duct is disposed along the corner and the ceiling between the rear surface portion and the side surface portion of the cab from the defrost device behind the cockpit, and the defrost blowout above the window on the front surface portion. It is connected to the department. For this reason, the defrost duct does not interfere with the operator. Further, since the defrost duct is disposed inside the cab, no heat insulating material is required. Thereby, in this working machine, a duct can be provided without a hindrance and a defrost facility can be provided at low cost.

  A work machine according to a second aspect of the present invention is the work machine of the first aspect, wherein a first front window provided on the front surface and a first front window are disposed on the front surface portion between the first front window and the first front window. A second front window and a third front window which are provided to be inclined are provided. And in a defrost blowing part, it is provided corresponding to the 1st blower outlet provided corresponding to the 1st front window, the 2nd blower outlet provided corresponding to the 2nd front window, and the 3rd front window. A third outlet is provided.

  In this work machine, a first air outlet, a second air outlet, and a third air outlet are provided corresponding to the first front window, the second front window, and the third front window, respectively. For this reason, it is possible to efficiently defrost each front window.

  A work machine according to a third invention is the work machine according to the first or second invention, wherein the defrost device is capable of generating cool air and warm air, and is connected to a first duct from which cool air or warm air for air conditioning is blown out. And a second duct connection port through which warm air for defrost is blown. The work machine further includes an air conditioning outlet and an air conditioning duct. The air-conditioning blow-out unit is disposed in front of or on the side of the cockpit, and blows out cool air or warm air generated by the defrost device into the cab. One end of the air conditioning duct is connected to the first duct connection port of the defrost device, the other end is connected to the air conditioning outlet, and is arranged along the side surface. The first defrost duct portion is connected to the second duct connection port of the defrost device.

  In this work machine, an air conditioning duct is provided in addition to the defrost duct, and cooling or heating in the cab is performed by sending cold air or warm air generated by the defrost device to the air conditioning outlet through the air conditioning duct. be able to. Further, since the air conditioning duct is disposed along the side surface of the cab, it is difficult for the operator to get in the way.

  In the work machine according to the present invention, the defrost duct is disposed from the defrost device behind the cockpit along the corner and the ceiling between the rear surface portion and the side surface portion of the cab, and above the front window. It is connected to the blowing part. For this reason, the defrost duct does not interfere with the operator. Further, since the defrost duct is disposed inside the cab, no heat insulating material is required. Thereby, in this working machine, a duct can be provided without a hindrance and a defrost facility can be provided at low cost.

<Configuration>
[Overall configuration of work machine]
A work machine 1 according to an embodiment of the present invention is shown in FIG. The work machine 1 is a bulldozer, and includes a vehicle main body 5 provided with a cab 2, a traveling device 3, a work implement 4, and the like. The vehicle main body 5 accommodates therein a drive device (not shown) including an engine and a hydraulic pump, and is placed on the traveling device 3. The traveling device 3 causes the work machine 1 to travel by driving the crawler belt 30. The work machine 4 includes a blade 71, an arm member 72 that supports the blade 71, hydraulic cylinders 73 and 74, and the like. The hydraulic cylinders 73 and 74 expand and contract to move the blade 71 in a desired direction.

[Composition of cab 2]
The cab 2 is equipped with a cockpit for an operator to sit on, a lever for various operations, a pedal, and instruments. A perspective view of the cab 2 is shown in FIG. 2, and a top view of the cab 2 is shown in FIG.

  The cab 2 has a pair of A pillars 21a and 21b, a pair of B pillars 22a and 22b, and a pair of C pillars 23a and 23b in order from the front side. Each pillar is spaced apart in the left-right direction (see arrow A2) of the work machine 1 and extends in the up-down direction.

  The cab 2 includes a front surface portion 24, left and right side surface portions 25 and 26, a rear surface portion 27, and a ceiling portion 28.

  The front surface part 24 is located in front of the B pillars 22a and 22b, and has a central front surface 11, a first side front surface 12, and a second side front surface 13. The central front surface 11 is provided between the A pillars 21a and 21b, and is arranged in parallel in the left-right direction. The center front surface 11 is disposed slightly inclined so that the upper side is located behind the lower side in a side view. The first lateral front surface 12 and the second lateral front surface 13 are arranged symmetrically with the central front surface 11 in between, and the first lateral front surface 12 is between the A pillar 21a and the B pillar 22a. The second side front surface 13 is provided between the A pillar 21b and the B pillar 22b. The first lateral front surface 12 and the second lateral front surface 13 are relative to the front-rear direction (see A1) so that the distance between the first lateral front surface 12 and the second lateral front surface 13 decreases toward the front side. The front surface portion 24 has a generally tapered shape. The first side front surface 12 is attached to the B pillar 22a via a hinge so that an operator's doorway provided between the A pillar 21a and the B pillar 22a can be opened and closed. Similarly, the second side front surface 13 is attached to the B pillar 22b.

  The front portion 24 has a first front window 14, a second front window 15, and a second front window formed of a transparent member such as glass so that an operator can visually check the front of the cab 2, particularly the front left and right oblique directions. Three front windows 16 are provided. The first front window 14 is provided on the central front surface 11, the second front window 15 is provided on the first side front surface 12, and the third front window 16 is provided on the second side front surface 13. For this reason, the second front window 15 and the third front window 16 are provided to be inclined with respect to the first front window 14. Since the engine hood 31 is provided in front of the central front surface 11 (see FIG. 1), the lower end of the first front window 14 is located above the floor surface of the cab 2. On the other hand, the lower ends of the second front window 15 and the third front window 16 are located in the vicinity of the floor surface of the cab 2.

  Of the left and right side surface portions 25, 26, the first side surface portion 25 is provided between the B pillar 22a and the C pillar 23a, and the second side surface portion 26 is disposed between the B pillar 22b and the C pillar 23b. Is provided. The interval between the B pillars 22a and 22b and the interval between the C pillars 23a and 23b are substantially the same, and the side surface portions 25 and 26 are arranged substantially parallel to the front-rear direction of the work machine 1, respectively. The side portions 25 and 26 are provided with side windows 17 and 18 formed of a transparent member such as glass, respectively.

  The rear surface portion 27 is provided between the C pillars 23a and 23b. The rear surface portion 27 is arranged in parallel in the left-right direction, and is provided with a rear window (not shown) formed of a transparent member such as glass.

  The ceiling portion 28 is provided so as to close the upper surface of the cab 2. The front portion 28 a of the ceiling portion 28 has a tapered trapezoidal shape corresponding to the shape of the front surface portion 24.

[Internal configuration of cab 2]
Inside the cab 2, as shown in FIGS. 4 to 6, the cockpit 29, the air conditioner 40, the defrost outlet 41, the defrost duct 42, the first air conditioning outlet 43, the first air conditioning duct 44, the second An air conditioning outlet 45 and a second air conditioning duct 46 are provided.

  The cockpit 29 is disposed substantially in the center of the cab 2 and is provided on the floor via a position adjustment mechanism 32 so that the position can be adjusted in the front-rear direction.

  The air conditioner 40 is disposed behind the cockpit 29, generates cool air or warm air, and blows it out of the air conditioning blowing parts 43 and 45 into the cab 2 through the air conditioning ducts 44 and 46. Cooling and heating can be performed. The air conditioner 40 can also function as a defrost device that removes fogging and freezing of the front window 14-16 by generating warm air and blowing it from the defrost blower 41 through the defrost duct 42.

  Further, as shown in FIG. 7, the air conditioner 40 is provided with a first duct connection port 47, a second duct connection port 48, and a main body outlet 49. The first duct connection port 47 is a portion where the first air conditioning duct 44 and the second air conditioning duct 46 are connected, and cool air or warm air for air conditioning is blown out. The second duct connection port 48 is a portion to which the defrost duct 42 is connected, and warm air for defrost is blown out. The main body outlet 49 is provided on the upper surface of the air conditioner 40, and is an opening for directly blowing out cold air or warm air for air conditioning into the cab 2.

  The defrost blowing part 41 is for blowing the warm air generated by the air conditioner 40 toward the front window 14-16 of the front part 24, and is provided above the front window 14-16 of the front part 24. . A storage space is provided between the upper surface of the ceiling portion 28 facing the outside of the cab 2 and the lower surface of the ceiling portion 28 facing the inside of the cab 2, and the defrost blowing portion 41 is formed on the upper surface of the cab 2. It is arrange | positioned in the storage space between a lower surface. Moreover, the defrost blowing part 41 is arrange | positioned facing the trapezoid-shaped front side part 28a of the ceiling part 28. As shown in FIG.

  As shown in FIGS. 6 and 7, the defrost blowing part 41 has a front part 50 and a rear part 51. The side surfaces 52 and 53 of the front portion 50 are arranged to be inclined with respect to the front-rear direction so that the distance between the side surfaces 52 and 53 becomes smaller toward the front side, and the side surfaces 52 and 53 of the front portion 50 are respectively the second front side. Arranged along the window 15 and the third front window 16. In addition, the front surface of the front part 50 has a shape recessed backward. Further, as shown in FIGS. 6 and 8, the lower surface of the front portion 50 has a first air outlet 55, a second air outlet 56, and a third air outlet 57 facing the space in the cab 2. Is provided. The first air outlet 55 is provided at a position facing the first front window 14 in a top view corresponding to the first front window 14, and is disposed along the first front window 14. The first air outlet 55 is disposed between the second air outlet 56 and the third air outlet 57. The second air outlet 56 is provided at a position facing the second front window 15 in a top view corresponding to the second front window 15, and is disposed along the second front window 15. The third outlet 57 is provided at a position facing the third front window 16 in a top view corresponding to the third front window 16, and is disposed along the third front window 16.

  The rear part 51 is connected to the rear surface of the front part 50. The side surfaces of the rear portion 51 are arranged substantially in parallel along the front-rear direction, and the interval between the side surfaces of the rear portion 51 is larger than the interval between the side surfaces of the front portion 50. For this reason, the front portion 50 has a shape protruding from the side surface of the rear portion 51 to both sides. A defrost duct 42 is connected to the rear surface of the rear portion 51, and the warm air sent to the defrost blowing portion 41 through the defrost duct 42 passes through the space inside the rear portion 51 and the front portion 50 of the defrost blowing portion 41. Then, the air is blown out from the first air outlet 55, the second air outlet 56, and the third air outlet 57 of the front portion 50 toward the front windows 14-16.

  The defrost duct 42 is a duct for conveying the warm air generated by the air conditioner 40 to the defrost blowing part 41, and includes a first defrost duct part 58 and a second defrost duct part 59. The first defrost duct portion 58 is connected to the second duct connection port 48 of the air conditioner 40 and extends in the vertical direction along the corner portion between the rear surface portion 27 and the second side surface portion 26 of the cab 2. It is a part to be done. That is, the first defrost duct portion 58 is provided along the C pillar 23b. The second defrost duct portion 59 is disposed in a storage space between the upper surface and the lower surface of the ceiling portion 28, and is disposed along the ceiling portion 28. As shown in FIG. 6, the second defrost duct portion 59 has a shape bent substantially at a right angle, and has a straight rear portion 59a and a front portion 59b. The rear portion 59a has a shape extending in the front-rear direction along the beam portion 60 that connects the upper end portion of the B pillar 22b and the upper end portion of the C pillar 23b, and the rear end portion of the rear portion 59a is the first end portion. It is connected to the upper end portion of the 1 defrost duct portion 58. The front portion 59b is disposed along the left-right direction, one end of which is connected to the rear portion 59a, and the other end is connected to the rear surface of the defrost blowing portion 41.

  The first air conditioning blow-out unit 43 and the second air conditioning blow-out unit 45 are for blowing cold air or warm air generated by the air conditioner 40 into the cab 2.

  The 1st air-conditioning blowing part 43 is arrange | positioned along B pillar 22a, and has the shape extended in the up-down direction. As shown in FIG. 7, the first air-conditioning outlet 43 blows the air-conditioning cold air or warm air sent to the first air-conditioning outlet 43 through the first air-conditioning duct 44 into the cab 2. An outlet 61 is provided.

  The first air conditioning duct 44 connects the air conditioner 40 and the first air conditioning outlet 43, and conveys the cold air or warm air generated in the air conditioner 40 to the first air conditioning outlet 43. As shown in FIGS. 4 and 6, the first air conditioning duct 44 is disposed along the first side surface portion 25 so as to pass to the side of the cockpit 29 below the side window 17 of the first side surface portion 25. Has been.

  The 2nd air conditioning blowing part 45 is arrange | positioned along B pillar 22b, and has the shape extended in the up-down direction. As shown in FIG. 7, the second air-conditioning blower 45 blows the air-conditioning cold air or warm air sent to the second air-conditioning blower 45 through the second air-conditioning duct 46 into the cab 2. An outlet 62 is provided.

  The second air conditioning duct 46 connects the air conditioner 40 and the second air conditioning outlet 45, and conveys the air conditioning cold air or warm air generated in the air conditioning apparatus 40 to the second air conditioning outlet 45. The second air conditioning duct 46 is disposed along the second side surface portion 26 so as to pass below the side window 18 (see FIGS. 2 and 5) of the second side surface portion 26. It passes by the side of the cockpit 29 opposite to 44.

  The pilot seat 29 described above is disposed between the B pillars 22a and 22b and the C pillars 23a and 23b in the front-rear direction, and the front end portion of the seat surface of the cockpit seat 29 is close to the B pillars 22a and 22b in a side view. doing. For this reason, the first air-conditioning outlet 43 and the second air-conditioning outlet 45 are located on the side of the cockpit 29 and slightly in front of the cockpit 29. The air-conditioning outlets 43 and 45 may be provided on the side of the cockpit 29 instead of being provided in front of the cockpit 29.

<Operations during air conditioning operation and defrost operation>
Next, operations during air conditioning operation and defrost operation will be described.

  During the air conditioning operation, cold air or warm air (hereinafter referred to as “air conditioned air”) is generated in the air conditioner 40 in accordance with a preset air conditioning temperature and blown out from the first duct connection port 47 (see FIG. 7). The conditioned air blown out from the first duct connection port 47 is divided into the first air conditioning duct 44 and the second air conditioning duct 46 and is sent to the first air conditioning outlet 43 and the second air conditioning outlet 45. The conditioned air sent to the first air conditioning outlet 43 and the second air conditioning outlet 45 is blown into the cab 2 from the outlets 61 and 62. Thereby, cooling or heating in the cab 2 is performed.

  During the defrost operation, warm air generated in the air conditioner 40 (hereinafter referred to as “defrost air”) is blown out from the second duct connection port 48. The defrost air blown out from the second duct connection port 48 passes through the defrost duct 42 and is sent to the defrost blowing portion 41. The defrost air sent to the defrost outlet 41 is divided into a first outlet 55, a second outlet 56, and a third outlet 57 and is blown out. At this time, the defrost air blown from the first blower outlet 55 is blown to the first front window 14, and the defrost air blown from the second blower outlet 56 is blown to the second front window 15 and the third blower The defrost air blown from the outlet 57 is blown to the third front window 16. Thereby, even if the 1st front window 14, the 2nd front window 15, and the 3rd front window 16 are mutually arrange | positioned at a predetermined angle as mentioned above, each front window 14-16 is defrosted efficiently. be able to.

  In the defrosting operation, air is blown out only from the second duct connection port 48 and no air is blown out from the first duct connection port 47, and both the second duct connection port 48 and the first duct connection port 47 are used. The air conditioner 40 may be configured to be able to switch between a state in which air is blown out from.

<Features>
In the work machine 1, the defrost duct 42 is disposed along the corner portion between the rear surface portion 27 and the second side surface portion 26 of the cab 2 and the ceiling portion 28 from the air conditioner 40 behind the cockpit 29. The defrost blowing part 41 above the front window 14-16 of the front part 24 is connected. For this reason, the defrosting duct 42 does not interfere with the operator. Further, since the defrost duct 42 is disposed inside the cab 2, no heat insulating material is required. Thereby, in this working machine 1, the defrost equipment can be provided at a low cost without the duct being in the way.

  In addition, the first air conditioning duct 44 and the second air conditioning duct 46 are disposed along the side surface portions 25 and 26, and along the air conditioner 40 behind the cockpit 29 and the B pillars 22 a and 22 b. The 1st air conditioning blowing part 43 and the 2nd air conditioning blowing part 45 which were arrange | positioned are connected. For this reason, the first air conditioning duct 44 and the second air conditioning duct 46 are also arranged so as not to obstruct the operator.

  ADVANTAGE OF THE INVENTION According to this invention, in a working machine, a duct does not become obstructive and can provide a defrost installation at low cost.

The side view of a working machine. The perspective view of a cab. The top view of a cab. The perspective view which shows the internal structure of a cab. The side view which shows the internal structure of a cab. The top view which shows the internal structure of a cab. The figure which shows arrangement | positioning of the apparatus regarding an air conditioning and a defrost. The figure which shows the blower outlet of a defrost blowing part.

DESCRIPTION OF SYMBOLS 1 Work machine 2 Cab 14 1st front window 15 2nd front window 16 3rd front window 24 Front surface part 25,26 Side surface part 27 Rear surface part 28 Ceiling part 29 Pilot seat 40 Air conditioner (defrost device)
41 Defrost blowing portion 42 Defrost duct 43, 45 Air conditioning blow portion 44, 46 Air conditioning duct 55 First outlet 56 Second outlet 57 Third outlet 58 First defrost duct portion 59 Second defrost duct portion

Claims (3)

A cab having a front portion provided with a window, a rear surface portion, left and right side portions, and a ceiling portion;
Pillars arranged extending in the vertical direction along the corners between the rear and side portions of the cab,
A beam portion disposed to extend forward from an upper end portion of the pillar;
A cockpit seat disposed in the cab;
A defrost device disposed behind the cockpit and generating warm air;
A defrost blowing section provided above the window of the front section and for blowing out the warm air generated by the defrost device toward the window of the front section;
Air that is connected to the defrost device and extends in the vertical direction along the pillar at a corner portion between the rear surface portion and the side surface portion of the cab, and is conveyed from the defrost device to the defrost blowing portion. a first defrost duct portion through a rear portion which is arranged to extend forwardly from the front Stories upper end of the first defrost is connected to the duct section and the first defrost duct portion along the beam portion, the rear and a front portion of the front end portion Ru are arranged to extend along the lateral direction is connected to the defrost unit, conveying from said defrost device is disposed along the ceiling to the defrost unit And a second defrost duct part through which the air is passed, and for defrosting for conveying warm air generated by the defrost device to the defrost blowing part And ECTS,
Working machine with. The front portion includes a first front window provided on the front surface, a second front window and a third front window which are disposed with the first front window interposed therebetween and are inclined with respect to the first front window. And is provided,
The defrost blowout portion corresponds to the first air outlet provided corresponding to the first front window, the second air outlet provided corresponding to the second front window, and the third front window. A third outlet is provided,
The work machine according to claim 1. The defrost device is capable of generating cold air and warm air, and has a first duct connection port through which cool air or warm air for air conditioning is blown out, and a second duct connection port through which warm air for defrost is blown out,
An air-conditioning blowout unit that is arranged in front or side of the cockpit and blows out cold air or warm air generated by the defrost device into the cab;
One end is connected to the first duct connection port of the defrost device, the other end is connected to the air conditioning outlet, and the air conditioning duct is disposed along the side surface;
Further comprising
The first defrost duct part is connected to the second duct connection port of the defrost device.
The work machine according to claim 1 or 2.

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