Working machinery

Abstract

The present invention provides a work machine that, in a configuration in which a monitor and air conditioning system are installed inside the cabin, ensures the habitability of the operator inside the cabin while also ensuring good forward visibility for the operator. [Solution] The work machine comprises an air conditioning unit positioned in the cabin, to one side of the driver's seat and in front of it; a monitor positioned above the air conditioning unit; a first frame that separates the front window, located at the front of the cabin, into upper and lower sections; and a second frame positioned at the front, to one side of the first frame and extending upward. In a front view, the monitor is positioned to overlap the first and second frames.

Description

Technical Field

[0001] The present invention relates to a working machine.

Background Art

[0002] Conventionally, a hydraulic excavator in which a monitor and an air conditioner are arranged inside a cab is known (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] When arranging a monitor inside the cab, in order to ensure the visibility of the monitor by the operator sitting on the driver's seat, it is necessary to arrange the monitor in front of the driver's seat. However, in this arrangement, the monitor blocks the forward view of the operator. On the other hand, in front of the operator, the front part (including the front window) of the cab is arranged, and there is a frame in the front part. Therefore, a part of the forward view of the operator is also blocked by the above frame. Therefore, when arranging a monitor inside the cab, it is necessary to arrange the monitor in consideration of the position of the above frame in order to ensure good visibility in front of the operator. Further, when arranging an air conditioner in addition to the monitor inside the cab, it is also necessary to ensure the habitability of the operator in the narrow cab.

[0005] The present invention has been made to solve the above problems, and an object thereof is to provide a working machine capable of ensuring the habitability of an operator inside a cab and ensuring good visibility in front of the operator in a configuration where a monitor and an air conditioner are arranged inside the cab.

Means for Solving the Problems

[0006] A working machine according to one aspect of the present invention comprises an air conditioning unit located in a cabin, on one side and in front of the driver's seat; a monitor located above the air conditioning unit; a first frame located in the front of the cabin that separates the front window vertically; and a second frame located in the front that is on one side of the first frame and extends upward, wherein, in a front view, the monitor is positioned to overlap the first frame and the second frame. [Effects of the Invention]

[0007] In a configuration where the monitor and air conditioning system are located inside the cabin, it is possible to ensure the operator's comfort inside the cabin while also ensuring good forward visibility for the operator. [Brief explanation of the drawing]

[0008] [Figure 1] This is a left side view showing a schematic configuration of a hydraulic excavator, which is an example of a work machine of the present invention. [Figure 2] This is a perspective view of the cabin of the hydraulic excavator shown above, taken from the front right. [Figure 3] This is a perspective view of the front upper window located at the front of the cabin shown above. [Figure 4] This is a schematic plan view showing the internal configuration of the cabin when the cabin is cut by a horizontal plane including line AA in Figure 1. [Figure 5] This is a perspective view of the right front part of the cabin shown above, seen from the left rear. [Figure 6] This is a perspective view of the air conditioning unit and monitor located inside the cabin, as seen from the front left. [Figure 7] This is a front view of the cabin as seen from the front. [Figure 8] This is a front view of the cabin described above, with the front window omitted from the illustration in Figure 7. [Figure 9]This is a front view of the cabin described above, with the wiper and wiper drive unit shown in Figure 8 further omitted. [Modes for carrying out the invention]

[0009] Embodiments of the present invention will be described below with reference to the drawings.

[0010] [1. Outline configuration of the work machine] Figure 1 is a left side view showing a schematic configuration of a hydraulic excavator 1, which is an example of a work machine according to one embodiment of the present invention. The hydraulic excavator 1 comprises a lower traveling body 2, a work machine 3, and an upper rotating body 4.

[0011] In this embodiment, directions are defined as follows: The direction in which the operator (driver, operator) seated in the driver's seat 44a located in the driver's section 44 of the upper slewing body 4 faces forward is defined as "front," and the opposite direction is defined as "rear." When the upper slewing body 4 is not slewing relative to the lower traveling body 2 (slewing angle 0 degrees), the front-rear direction of the upper slewing body 4 coincides with the front-rear direction of the lower traveling body 2. The drawing shows the hydraulic excavator 1 in the state where the upper slewing body 4 is not slewing relative to the lower traveling body 2. Also, the left side as seen from the perspective of the operator seated in the driver's seat 44a is defined as "left," and the right side as "right." Furthermore, the direction of gravity perpendicular to the front-rear and left-right directions is defined as the up-down direction, with the upstream side of the direction of gravity being defined as "up," and the downstream side as "down." In the drawing, the forward direction is indicated by the symbol "F," the rear by "B," the right by "R," the left by "L," the upper by "U," and the lower by "D," as needed.

[0012] The lower travel body 2 comprises a pair of left and right crawlers 21, a pair of left and right travel motors 22, and a blade 23. The left and right travel motors 22 drive the left and right crawlers 21 respectively, allowing the hydraulic excavator 1 to move forward and backward. The travel motors 22 are hydraulic motors. The blade 23, which performs leveling work, is located on the front side of the lower travel body 2. The blade 23 is rotated by a blade cylinder (not shown). The blade cylinder is a hydraulic cylinder.

[0013] The working machine 3 includes a boom 31, an arm 32, and a bucket 33. By driving the boom 31, the arm 32, and the bucket 33 independently, excavation work such as earth and sand can be performed.

[0014] The boom 31 has a lower boom 31a, an upper boom 31b, and an arm stay 31c. The base end portion of the lower boom 31a is connected to the right front portion of the upper revolving body 4 so as to be rotatable in the vertical and front-rear directions. The tip end portion of the boom cylinder (not shown) is connected to the tip end portion of the lower boom 31a. The base end portion of the boom cylinder is connected to the right front portion of the upper revolving body 4. More specifically, the boom cylinder is disposed in front of the lower boom 31a. The boom cylinder is movably extendable and retractable. When the boom cylinder extends and retracts, the lower boom 31a rotates in the vertical and front-rear directions with respect to the upper revolving body 4.

[0015] The base end portion of the upper boom 31b is connected to the tip end portion of the lower boom 31a so as to be rotatable in the left-right direction. The arm stay 31c is connected to the tip end portion of the upper boom 31b so as to be rotatable in the left-right direction. The base end portion of the offset cylinder 31b1 is connected to the left side surface of the base end portion of the upper boom 31b. The tip end portion of the offset cylinder 31b1 is connected to the left side surface of the arm stay 31c. The offset cylinder 31b1 is movably extendable and retractable. The left side surface of the arm stay 31c and the left side surface of the tip end portion of the lower boom 31a are connected by a link rod 31b2.

[0016] When the offset cylinder 31b1 extends and retracts, the upper boom 31b rotates in the left-right direction with respect to the lower boom 31a, and the arm stay 31c moves (offsets) in the left-right direction. At this time, the arm stay 31c rotates in the left-right direction with respect to the upper boom 31b. Thereby, the arm stay 31c moves in the left-right direction without rotating in the left-right direction with respect to the lower boom 31a.

[0017] The base end portion of the arm 32 is connected to the arm stay 31c so as to be rotatable in the vertical and front-rear directions. The tip end portion of the arm cylinder 32a is connected to the base end portion of the arm 32. The intermediate portion between the tip end portion and the base end portion of the arm cylinder 32a is connected to the arm stay 31c. The arm cylinder 32a is movably telescopic. When the arm cylinder 32a expands and contracts, the arm 32 rotates in the vertical and front-rear directions with respect to the arm stay 31c.

[0018] The bucket 33 is connected to the tip end portion of the arm 32 so as to be rotatable in the vertical and front-rear directions. The bucket 33 is also connected to the arm 32 via the bucket link 34. The base end portion of the bucket cylinder 33a is connected to the base end portion of the arm 32. The tip end portion of the bucket cylinder 33a is connected to the bucket link 34. The bucket cylinder 33a is movably telescopic. When the bucket cylinder 33a expands and contracts, the bucket 33 rotates in the vertical and front-rear directions with respect to the arm 32.

[0019] The boom cylinder, the offset cylinder 31b1, the arm cylinder 32a, and the bucket cylinder 33a are constituted by hydraulic cylinders.

[0020] The upper swing body 4 is located above the lower traveling body 2 and is provided so as to be swingable with respect to the lower traveling body 2 via a swing bearing (not shown). The upper swing body 4 includes a swing frame 41, a swing motor 42, a machine room 43, an operation unit 44, and a cabin 100. That is, the hydraulic excavator 1 includes the cabin 100.

[0021] The upper swing body 4 swings via the above swing bearing by the drive of the swing motor 42 arranged on the swing frame 41. The swing motor 42 is constituted by a hydraulic motor.

[0022] The engine EG is housed in the machine room 43. The engine EG is a drive source of the hydraulic excavator 1. The engine EG is constituted by a diesel engine, but is not limited thereto, and may be constituted by, for example, a gasoline engine.

[0023] The machine room 43 houses the engine EG as well as several hydraulic pumps (not shown). Each of these hydraulic pumps supplies hydraulic fluid (pressurized oil) to the hydraulic motors and hydraulic cylinders. The hydraulic motors include, for example, the left and right travel motors 22 and the slewing motor 42. The hydraulic cylinders include, for example, the blade cylinder, boom cylinder, offset cylinder 31b1, arm cylinder 32a, and bucket cylinder 33a. The hydraulic motors and hydraulic cylinders driven by hydraulic fluid are collectively called hydraulic actuators.

[0024] The driver's unit 44 is located on the upper left side of the upper slewing body 4. More specifically, the driver's unit 44 is located to the left of the work implement 3. The driver's unit 44 is equipped with a driver's seat 44a. Multiple control members 44b are arranged around the driver's seat 44a. The multiple control members 44b consist of levers, switches, pedals, etc. When the operator sits in the driver's seat 44a and operates the multiple control members 44b, the hydraulic actuator is driven. This enables the lower traveling body 2 to travel, leveling work with the blade 23, excavation work with the work implement 3, rotation of the upper slewing body 4, etc.

[0025] The cabin 100 is positioned to cover the driver's unit 44. That is, the cabin 100 is positioned on the upper left side of the upper rotating body 4, similar to the driver's unit 44. The work equipment 3 is positioned to the right of the cabin 100. The configuration of the cabin 100 will be described below.

[0026] [2. Cabin Configuration] (2-1. Exterior configuration of the cabin) Figure 2 is a perspective view of the cabin 100 as seen from the front right. The cabin 100 comprises a front section 100F, a right side section 100R, a rear section 100B (see Figure 1), a left side section 100L (see Figure 1), a door 100D (see Figure 1), and an upper section 100U. The cabin 100 is constructed with an open bottom.

[0027] The front section 100F is positioned in front of the driver's seat 44a (see Figure 1) in the cabin 100, and covers the driver's seat 44a from the front. Since the front section 100F constitutes the front of the cabin 100, it can also be called the front section. The front section 100F is positioned between the right front pillar P1 and the left front pillar P5. Here, the right front pillar P1 is erected on the lower right front of the driver's section 44 (see Figure 1) and extends upward. The left front pillar P5 is erected on the lower left front of the driver's section 44 and extends upward.

[0028] The front section 100F is provided with a front window 100FW. The front window 100FW is made of a transparent panel, such as glass. This allows the operator seated in the driver's seat 44a to see ahead through the front window 100FW. The transparent panel may be made of resin (for example, polycarbonate). Further details of the front section 100F will be described later.

[0029] The right-side section 100R is positioned to the right of the driver's seat 44a in the cabin 100 and covers the driver's seat 44a from the right side. Since the right-side section 100R constitutes the right side of the cabin 100, it can also be called the right-side section. The right-side section 100R is connected to the front section 100F via the right front pillar P1. The right-side section 100R has a side wall section 100RA and a right window 100RW.

[0030] The side wall portion 100RA is located to the right of the driver's seat 44a. Here, one side in the left-right direction is also called "one lateral side," and the other side is also called "the other lateral side." Thus, it can be said that the cabin 100 has a side wall portion 100RA located to one lateral side (the right side in the example of Figure 2) relative to the driver's seat 44a.

[0031] The side wall section 100RA has a lower wall 100RA1 and a horizontal frame 100RA2. The lower wall 100RA1 is a wall that extends in the front-rear direction and the up-down direction. An outside air intake 100RA1p is provided in the lower wall 100RA1. The outside air intake 100RA1p is an opening for taking in outside air (outside air) from the cabin 100 by an air conditioning device 50 (see Figure 5, etc.), which will be described later. In this embodiment, two outside air intakes 100RA1p are provided, but the number is not particularly limited.

[0032] The horizontal frame 100RA2 extends in the front-rear direction along the upper end of the lower wall 100RA1. The front end of the horizontal frame 100RA2 is connected between the upper and lower ends of the right front pillar P1. The rear end of the horizontal frame 100RA2 is connected to the lower end of the right rear pillar P2, which extends in the vertical direction. The right rear pillar P2 is erected on the upper surface of the machine room 43 (see Figure 1).

[0033] The right window 100RW is positioned above the lower wall 100RA1 via a horizontal frame 100RA2. The right window 100RW is made of a transparent panel, such as glass. This allows the operator to see to the right through the right window 100RW from inside the cabin 100. The transparent panel may be made of resin.

[0034] Two guide frames 100RG are positioned to the right of the right window 100RW. Each guide frame 100RG spans the front-to-rear distance between the right front pillar P1 and the right rear pillar P2, and is positioned apart vertically. Each guide frame 100RG is provided for the purpose of reinforcing the cabin 100 and ensuring the safety of the operator. For example, even if the hydraulic excavator 1 were to tip over, each guide frame 100RG would prevent the operator from being thrown out of the cabin 100 through the right window 100RW. Note that the number of guide frames 100RG is not limited to the two mentioned above; there may be one or three or more.

[0035] The rear section 100B is positioned behind the driver's seat 44a in the cabin 100 and covers the driver's seat 44a from the rear. Since the rear section 100B constitutes the rear surface of the cabin 100, it can also be called the rear section. The rear section 100B is connected to the right side section 100R via the right rear pillar P2.

[0036] As shown in Figure 1, the rear section 100B includes a rear window 100BW. The rear window 100BW is made of a transparent panel, such as glass. This allows the operator to see behind the cabin 100 through the rear window 100BW. The transparent panel may also be made of resin. The rear window 100BW is curved such that its left end is located further forward than its right end.

[0037] The left side section 100L is located to the left rear of the driver's seat 44a in the cabin 100, and covers the driver's seat 44a from the left rear. Since the left side section 100L constitutes the left side of the cabin 100, it can also be called the left side section. The left side section 100L is connected to the rear section 100B via a left rear pillar P3 that extends vertically. The left rear pillar P3 is erected on the upper surface of the machine room 43.

[0038] As shown in Figure 1, a center pillar P4 extending vertically is positioned between the left front pillar P5 and the left rear pillar P3. The left side section 100L is connected to the center pillar P4 and the left rear pillar P3. When the cabin 100 is viewed from the rear, the center pillar P4 is positioned to the left (on the other side) of the left rear pillar P3.

[0039] The left side section 100L includes a left window 100LW. The left window 100LW is positioned at an angle to the front-rear direction such that its left end is located further forward than its right end. The left window 100LW is made of a transparent panel, such as glass. This allows the operator to see the left rear through the left window 100LW from inside the cabin 100. The transparent panel may be made of resin.

[0040] Door 100D is located in the cabin 100, to the left and in front of the driver's seat 44a. Door 100D is rotatably supported by the center pillar P4 so that it opens forward. The operator can enter and exit the driver's compartment 44 by opening and closing door 100D.

[0041] As shown in Figure 2, the upper part 100U is positioned above the driver's seat 44a in the cabin 100 and covers the driver's seat 44a from above. Since the upper part 100U constitutes the upper surface of the cabin 100, it is also called the upper surface portion.

[0042] The upper part 100U is connected to the upper pillar P6. One end of the upper pillar P6 is connected to the upper end of the right front pillar P1 via the right curved portion P1a. The other end of the upper pillar P6 is connected to the upper end of the left front pillar P5 via the left curved portion P5a. The upper pillar P6 is supported by the right rear pillar P2, the left rear pillar P3, and the center pillar P4. Thus, the upper pillar P6 extends rearward from one end along the upper end of the right side 100R, to the left along the upper end of the rear 100B, further forward to the left along the upper end of the left side 100L, and forward, passing over the door 100D, that is, to the other end.

[0043] A metal top plate 100U1 is positioned on the upper part 100U. A skylight 100UW is provided on the top plate 100U1. The skylight 100UW is made of a transparent plate, for example, made of transparent resin. This allows the operator to see upwards from inside the cabin 100 through the skylight 100UW, and to check the movement of the work machine 3, for example, through the skylight 100UW. The skylight 100UW may also be made of transparent glass.

[0044] (2-2. Detailed configuration of the front section) The aforementioned front window 100FW, located in the front section 100F of the cabin 100, includes a front upper window 100FW1 and a front lower window 100FW2. The front upper window 100FW1 and the front lower window 100FW2 are separated by a first frame F1 that extends in the left-right direction. In other words, the front window 100FW is separated into the front upper window 100FW1 and the front lower window 100FW2 by the first frame F1. Thus, the hydraulic excavator 1 is provided with a first frame F1 in the front section 100F that separates the front window 100FW vertically.

[0045] The front lower window 100FW2 is positioned in front of and below the driver's seat 44a. The front lower window 100FW2 is supported by a groove (not shown) provided in the front part 100F and is slidable in the vertical direction.

[0046] The front upper window 100FW1 can change its position between a closed state and an open state by a link mechanism (not shown) provided inside the cabin 100. Here, the closed state of the front upper window 100FW1 refers to the state in which the front upper window 100FW1 is located in front of the driver's seat 44a and faces the front lower window 100FW2, which is located in front of and below the driver's seat 44a, in the vertical direction via the first frame F1 (see Figure 2). In the closed state, no gap or open space is formed between the front upper window 100FW1 and the front lower window 100FW2. On the other hand, the open state of the front upper window 100FW1 refers to the state in which the upper end of the front upper window 100FW1 moves rearward and the lower end moves upward, opening up the area in front of the driver's seat 44a, that is, the state in which an open space is formed between the front upper window 100FW1 and the front lower window 100FW2.

[0047] When the front upper window 100FW1 is open, the area above the front lower window 100FW2 is open, allowing the front lower window 100FW2 to slide upward. By sliding the front lower window 100FW2 upward, it becomes possible to remove the front lower window 100FW2 from the groove. When the front lower window 100FW2 is removed, the open space formed in front of the driver's seat 44a becomes even larger. This makes it easier for the operator to see a wide area of ​​the work area in front of them through the open space.

[0048] In addition to the first frame F1 described above, the hydraulic excavator 1 includes a second frame F2, a third frame F3, and a fourth frame F4. The second frame F2 is positioned on one side (the right side in the example of Figure 2) relative to the first frame F1 in the front section 100F and extends upward. The second frame F2 is connected to the right front pillar P1. A right bend F2a is provided at the lower end of the second frame F2, extending to the other side (the left side in the example of Figure 2).

[0049] The third frame F3 is positioned on the other side (left side in the example of Figure 2) relative to the first frame F1 in the front section 100F and extends upward. The third frame F3 is connected to the left front pillar P5. A left bend F3a is provided at the lower end of the third frame F3, extending to one side (right side in the example of Figure 2). The right bend F2a and the left bend F3a are positioned apart in the left-right direction, but may be connected to each other.

[0050] The fourth frame F4 connects the upper end of the second frame F2 and the upper end of the third frame F3 in the left-right direction at the front section 100F. The fourth frame F4 is fixed to a reinforcing frame (not shown) that connects the right curved section P1a and the left curved section P5a in the left-right direction. The fourth frame F4 is positioned in front of the reinforcing frame.

[0051] Figure 3 is a perspective view of the front upper window 100FW1. The first frame F1 described above is attached to the lower edge DE of the front upper window 100FW1. The right end F1a and left end F1b of the first frame F1 are slidably supported by guides (not shown) that extend vertically within the cabin 100. The right end F1a is covered from the front by the second frame F2 (see Figure 2). That is, the second frame F2 is positioned to overlap with the right end F1a of the first frame F1. The left end F1b is covered from the front by the third frame F3 (see Figure 2). That is, the third frame F3 is positioned to overlap with the left end F1b of the first frame F1. The front upper window 100FW1 is formed in a pentagonal shape with the upper left part cut out, but it may also be formed in a square shape without a cutout.

[0052] A wiper WP is mounted on the front side of the front upper window 100FW1 (opposite the driver's seat 44a). The lower end WPa, which is the pivot point of the wiper WP, is located on the right side of the front upper window 100FW1, that is, on one side. On the other hand, a wiper drive unit 110 is mounted on the rear side of the front upper window 100FW1 (towards the driver's seat 44a). The wiper drive unit 110 is a drive mechanism that drives the wiper WP and includes a motor, etc. The wiper drive unit 110 is mounted on one side of the front upper window 100FW1 and is connected to the wiper WP via a shaft. The shaft is the pivot axis of the wiper WP and is provided passing through the front upper window 100FW1.

[0053] In this embodiment, a shaft is attached to the lower end WPa of the wiper WP, and the upper end WPb of the wiper WP rotates around the lower end WPa. Alternatively, a pivot shaft may be attached to the upper end WPb of the wiper WP, and the lower end WPa of the wiper WP may rotate around the upper end WPb. Thus, the hydraulic excavator 1 of this embodiment includes a wiper WP provided on the front window 100FW of the cabin 100, and a wiper drive unit 110 attached to the front window 100FW to drive the wiper WP. The wiper drive unit 110 is attached to one side of the front window 100FW.

[0054] The second frame F2, third frame F3, and fourth frame F4 shown in Figure 2 are positioned in front of the front upper window 100FW1 and the front lower window 100FW2. When the front upper window 100FW1 is closed, its right edge RE and left edge LE (see Figure 3) overlap with the second frame F2 and third frame F3, respectively, and its upper edge UE (see Figure 3) overlaps with the fourth frame F4. Also, the right edge of the front lower window 100FW2 overlaps with the second frame F2, and the left edge of the front lower window 100FW2 overlaps with the third frame F3.

[0055] (2-3. Cabin Interior Configuration) Next, the internal configuration of the cabin 100 will be described. Figure 4 is a schematic plan view showing the internal configuration of the cabin 100 when the cabin 100 is cut by a horizontal plane including line AA in Figure 1. Line AA is a horizontal line passing above the first frame F1. Figure 5 is a perspective view of the right front of the cabin 100 from the left rear. For convenience, the right window 100RW is omitted from Figure 5. Figure 6 is a perspective view of the air conditioning unit 50 and monitor 60 located inside the cabin 100, viewed from the left front.

[0056] 《2-3-1. Control Components》 As shown in Figure 4, the cabin 100 is equipped with control members 44b, including a right control lever 44b1, a left control lever 44b2, a function limiting lever 44b3, a pair of travel levers 44b4, and a number of pedals 44b5.

[0057] The right operating lever 44b1 is supported by the right control box 45R, which is located to the right of the driver's seat 44a. The left operating lever 44b2 and the function limiting lever 44b3 are supported by the left control box 45L, which is located to the left of the driver's seat 44a. The function limiting lever 44b3 is a lever for switching the drive of the hydraulic actuator on and off and is provided to limit the function of the hydraulic actuator as needed. A pair of travel levers 44b4 and several pedals 44b5 are located in front of the driver's seat 44a.

[0058] 《2-3-2.Air conditioner》 An air conditioning unit 50 is positioned to the right front of the driver's seat 44a. That is, the hydraulic excavator 1 is equipped with an air conditioning unit 50 located within the cabin 100, on one side and in front of the driver's seat 44a. The air conditioning unit 50 is approximately rectangular in shape and is positioned to the left (on the other side) of the side wall 100RA. The air conditioning unit 50 is positioned below the first frame F1 (see Figure 2).

[0059] Inside the air conditioning unit 50, equipment necessary for air conditioning (temperature control of the air), such as an evaporator, blower, and heater core, is arranged. One top outlet 51 is provided on the top surface 50U of the air conditioning unit 50. In other words, the air conditioning unit 50 has a top outlet 51. Note that the number of top outlets 51 is not limited to one as described above, but may be multiple. On the left side surface 50L of the air conditioning unit 50, two side outlets 52 are provided side by side vertically at the front, and an air intake 53 is provided at the lower rear. Note that the number of side outlets 52 is not limited to two as described above, but may be one or three or more. Note that the right side surface of the air conditioning unit 50 faces the side wall 100RA.

[0060] An outdoor unit 54 (see Figure 1) is located behind the driver's seat 44a and below the rear section 100B. The outdoor unit 54 includes a compressor for compressing the refrigerant and a condenser for heat exchange. By circulating the refrigerant between the air conditioning unit 50 and the outdoor unit 54, and by performing heat exchange in the evaporator of the air conditioning unit 50 and the condenser of the outdoor unit 54, the air inside the cabin 100 (indoor air) drawn in from the air intake 53 of the air conditioning unit 50, or the air (outdoor air) taken into the air conditioning unit 50 from the outdoor air intake 100RA1p (see Figure 2) is cooled. Then, by driving the blower, cold air is blown into the cabin 100 from at least one of the top outlet 51 and the side outlet 52. Meanwhile, the coolant heated to a high temperature by the engine EG is circulated through the heater core, and air is blown into the heater core, causing warm air to be blown into the cabin 100 from at least one of the upper outlet 51 and the side outlet 52.

[0061] An opening 50P is provided in the upper surface 50U of the air conditioning unit 50, in front of the upper air outlet 51. The opening 50P is formed as a long rectangular shape extending in the front-to-back direction in a plan view. An outside air filter AF, which is approximately a rectangular parallelepiped shape, is mounted in the opening 50P so that it can be pulled out upwards. The installed outside air filter AF can be replaced by pulling it upwards and removing it from the opening 50P, and then fitting a new outside air filter AF into the opening 50P from above (see Figure 6).

[0062] When the outside air filter AF is installed in the opening 50P, the air taken into the air conditioning unit 50 from outside the cabin 100 via the outside air intake 100RA1p (see Figure 2) passes through the outside air filter AF. As a result, clean air, from which dust has been removed by the outside air filter AF, is supplied to the inside of the air conditioning unit 50. Thus, the air conditioning unit 50 has an opening 50P on its upper surface 50U into which the outside air filter AF is retractably installed.

[0063] 《2-3-3. Monitor》 A monitor 60 is positioned above the air conditioning unit 50. The monitor 60 is a display device that shows various information. For example, the monitor 60 displays various settings for the hydraulic excavator 1, fuel level, hour meter, and, if a surveillance camera is installed, images taken by the surveillance camera. The monitor 60 is positioned above the air conditioning unit 50 as follows.

[0064] As shown in Figures 4 to 6, the beam section 70 is fixed to the transverse frame 100RA2 included in the side wall section 100RA of the right side section 100R of the cabin 100. The transverse frame 100RA2 extends in the front-rear direction above (at a height) the air conditioning unit 50. The beam section 70 has a beam body 71 and a mounting stay 72 (see Figure 5). The beam body 71 is fastened to the left side of the transverse frame 100RA2 with bolts or the like and extends to the left. As a result, the beam section 70 is positioned to protrude from the side wall section 100RA to the other side and is positioned above the air conditioning unit 50.

[0065] The mounting stay 72 is fixed to the upper surface of the beam body 71 by welding or the like. The monitor 60 is fixed to the mounting stay 72 of the beam section 70 using bolts or the like. As a result, the monitor 60 is positioned above the air conditioning unit 50 while being supported by the beam section 70. Thus, the hydraulic excavator 1 is equipped with a monitor 60 positioned above the air conditioning unit 50. The hydraulic excavator 1 is also equipped with a beam section 70 that supports the monitor 60. The beam section 70 may be fixed to the horizontal frame 100RA2 by other means, such as by being hooked onto the horizontal frame 100RA2.

[0066] By positioning the monitor 60 above the air conditioning unit 50, the space above the air conditioning unit 50 within the cabin 100 is effectively utilized as space for the monitor 60. This allows the air conditioning unit 50 and the monitor 60 to be positioned together (compactly in the vertical direction) even if the interior space of the cabin 100 is limited, ensuring the operator's comfort within the cabin 100 and providing a comfortable interior space through the air conditioning unit 50.

[0067] Figure 7 is a front view of the cabin 100 as seen from the front. Figure 8 is a front view of the cabin 100 with the front window 100FW omitted from Figure 7. Figure 9 is a front view of the cabin 100 with the wiper WP and wiper drive unit 110 further omitted from Figure 8. In this embodiment, as shown in Figures 8 and 9, the monitor 60 is positioned so as to overlap the first frame F1 and the second frame F2 in a front view. More specifically, in a front view, the monitor 60 is positioned to protrude upward from the first frame F1. Also, in a front view, the monitor 60 is positioned to protrude to the left (other side) from the second frame F2.

[0068] In a configuration where the first frame F1 and the second frame F2 are positioned at the front 100F of the cabin 100, the first frame F1 and the second frame F2 are positioned in front of the operator when the operator is seated in the driver's seat 44a. As a result, part of the operator's forward field of view is obstructed by the first frame F1 and the second frame F2. In Figure 9, the operator's eye point at the time of design is shown by EP, the forward line of sight through the first frame F1 is shown by D1, and the forward line of sight through the second frame F2 is shown by D2 (similarly, the line of sight direction D2 is also shown in Figure 4). In this case, the forward field of view in line of sight direction D1 is obstructed by the first frame F1, and the forward field of view in line of sight direction D2 is obstructed by the second frame F2.

[0069] Furthermore, in a configuration where the air conditioning unit 50 is located on one side of the driver's seat 44a within the cabin 100, and the monitor 60 is positioned above the air conditioning unit 50, when the operator is seated in the driver's seat 44a, the monitor 60 is positioned diagonally in front of the operator (see Figure 4). This allows the operator to see the monitor 60, ensuring its visibility. On the other hand, a portion of the operator's forward field of vision is obstructed by the monitor 60.

[0070] As shown in Figures 8 and 9, in a configuration where the monitor 60 is positioned to overlap the first frame F1 and the second frame F2 when viewed from the front, the monitor 60 is positioned to overlap the line of sight direction D1 that crosses the first frame F1 and the line of sight direction D2 that crosses the second frame F2, from the perspective of the operator seated in the driver's seat 44a. The line of sight directions D1 and D2 are directions in which the operator's forward view is originally obstructed by the first frame F1 and the second frame F2. Therefore, by positioning the monitor 60 to overlap the line of sight directions D1 and D2, the impact of the monitor 60's position on the operator's forward visibility can be reduced.

[0071] For example, if the monitor 60 is positioned away from (without overlapping) the first frame F1 and the second frame F2 in a front view, the area in which the operator's forward view is obstructed is simply the sum of the area in which the forward view is obstructed by the first frame F1 and the second frame F2 and the area in which the forward view is obstructed by the monitor 60. In contrast, in this embodiment, the area in which the operator's forward view is obstructed by the first frame F1 and the second frame F2 and the area in which the operator's forward view is obstructed by the monitor 60 partially overlap. Therefore, the total area in which the operator's forward view is obstructed can be made smaller compared to a configuration in which the monitor 60 is positioned away from the first frame F1 and the second frame F2 in a front view. This reduces the impact of the monitor 60's placement on obstructing the operator's forward view. As a result, even with a configuration in which the monitor 60 is positioned inside the cabin 100, good forward visibility for the operator can be ensured.

[0072] In particular, in the hydraulic excavator 1 of this embodiment, an air conditioning unit 50 is placed next to the side wall portion 100RA of the cabin 100, and a monitor 60 is placed above the air conditioning unit 50. In such a configuration of the hydraulic excavator 1, the above-mentioned effects can be effectively obtained by arranging the monitor 60 so that it overlaps with the first frame F1 and the second frame F2 when viewed from the front.

[0073] In a configuration in which a monitor 60 is positioned above the air conditioning unit 50, if the beam portion 70 supporting the monitor 60 can be positioned close to the side wall portion 100RA, it becomes easier to position the monitor 60 so that it overlaps with the second frame F2 in a front view. From the viewpoint of positioning the beam portion 70 close to the side wall portion 100RA in this way, it is desirable that the beam portion 70 is positioned to protrude from the side wall portion 100RA to the other side.

[0074] From the perspective of positioning the monitor 60 at a height easily visible to the operator within the cabin 100, it is desirable to fix the beam portion 70 to the horizontal frame 100RA2 that extends in the front-rear direction above the air conditioning unit 50. Furthermore, it is desirable to support the monitor 60 with the beam portion 70 fixed to the horizontal frame 100RA2.

[0075] As described above, since the beam section 70 has a beam body 71, the monitor 60 can be positioned above the beam body 71 via the mounting stay 72. In order to ensure that the monitor 60 is positioned so that it is aligned with the first frame F1 when viewed from the front, it is desirable that the beam body 71, which is positioned below the monitor 60, be positioned in relation to the first frame F1 as follows. That is, as shown in Figures 8 and 9, it is desirable that the beam body 71 be positioned below the first frame F1 when viewed from the front.

[0076] In Figure 9, the outline of the wiper drive unit 110 shown in Figure 8 is shown by a dashed line. Also, the line of sight passing through the wiper drive unit 110 from the perspective of the operator seated in the driver's seat 44a is defined as D3. As shown in Figure 9, in this embodiment, the monitor 60 is positioned so as to overlap with the wiper drive unit 110 when viewed from the front. Note that in Figure 9, a part of the monitor 60 overlaps with the wiper drive unit 110 when viewed from the front, but the entire monitor 60 may overlap with the wiper drive unit 110. When the monitor 60 is positioned in this way, from the perspective of the operator seated in the driver's seat 44a, the monitor 60, which also obstructs the forward view, is positioned in the line of sight passing through the wiper drive unit 110 D3, that is, in the direction in which the operator's forward view is originally obstructed by the wiper drive unit 110. As a result, compared to a configuration in which the monitor 60 is not positioned in line of sight D3 (a configuration in which the monitor 60 is positioned away from the wiper drive unit 110 when viewed from the front), the influence of the monitor 60's position on forward visibility is reduced, and good forward visibility is ensured.

[0077] In order to minimize the impact of the monitor 60's placement on forward visibility, it is desirable that, when viewed from the front, the monitor 60 is positioned to overlap both the second frame F2 and the wiper drive unit 110 simultaneously. To achieve this placement of the monitor 60, it is desirable that, when viewed from the front, the wiper drive unit 110 be positioned on the same side as the second frame F2, which is positioned on one side. In other words, it is desirable that the wiper drive unit 110 be mounted on one side of the front window 100FW.

[0078] As shown in Figure 4, in this embodiment, in a plan view, a portion of the upper air outlet 51 of the air conditioning unit 50 is positioned on the driver's seat 44a side (rear) relative to the monitor 60, and the remaining portion of the upper air outlet 51 overlaps with the monitor 60. Alternatively, in a plan view, the entire upper air outlet 51 may be positioned on the driver's seat 44a side relative to the monitor 60.

[0079] In order to ensure a comfortable interior space within the cabin 100 by the air conditioning system 50, it is desirable that the air (e.g., cool air) blown out from the upper outlet 51 of the air conditioning system 50 toward the driver's seat 44a is not obstructed as much as possible by the monitor 60 positioned above the air conditioning system 50. From this viewpoint, as in this embodiment, it is desirable that, in a plan view, at least a portion of the upper outlet 51 of the air conditioning system 50 is positioned (shifted) toward the driver's seat 44a relative to the monitor 60.

[0080] As shown in Figure 4, in this embodiment, in a plan view, the entire upper air outlet 51 of the air conditioning unit 50 is positioned offset toward the driver's seat 44a side relative to the beam 70. Alternatively, in a plan view, a portion of the upper air outlet 51 may overlap with the beam 70, and the remaining portion of the upper air outlet 51 may be positioned offset toward the driver's seat 44a side relative to the beam 70.

[0081] Thus, when viewed from above, if at least a portion of the upper air outlet 51 is positioned (shifted) toward the driver's seat 44a side relative to the beam 70, it becomes easy to realize a configuration in which at least a portion of the upper air outlet 51 is positioned toward the driver's seat 44a side relative to the monitor 60 supported by the beam 70.

[0082] As shown in Figure 4, in this embodiment, in a plan view, a portion of the monitor 60 is positioned outside the opening 50P, and the remaining portion of the monitor 60 overlaps with the opening 50P. Alternatively, in a plan view, the entire monitor 60 may be positioned outside the opening 50P.

[0083] Thus, when at least a portion of the monitor 60 is positioned outside the opening 50P in a plan view, the risk of the outside air filter AF interfering with the monitor 60 above the opening 50P when inserting or removing the outside air filter AF into or from the opening 50P is reduced. This makes it easier to replace the outside air filter AF and simplifies maintenance.

[0084] In this embodiment, in a plan view, at least a portion of the monitor 60 is positioned behind the opening 50P. With this arrangement of the monitor 60, the monitor 60 is positioned closer to the driver's seat 44a, thereby improving the operator's visibility of the monitor.

[0085] In this embodiment, in a plan view, the monitor 60 is positioned at an angle so as to face left, that is, to the other side, with respect to the front-to-back direction in which the opening 50P extends (see Figure 4 in particular). With this angled positioning of the monitor 60, the display screen of the monitor 60 faces inward towards the cabin 100 (for example, towards the driver's seat 44a) with respect to the front-to-back direction. Therefore, the operator seated in the driver's seat 44a can easily see the display screen of the monitor 60. In addition, in a plan view, since the opening 50P extends in the front-to-back direction, it becomes easier to insert and remove the outside air filter AF along the side wall portion 100RA of the cabin 100 with respect to the opening 50P, making it easier to replace the outside air filter AF.

[0086] In this embodiment, where an outside air intake port 100RA1p is provided in the side wall portion 100RA of the cabin 100 to take in outside air from the outside to the inside of the cabin 100, it is desirable to place the outside air filter AF as far upstream as possible in the flow path of the incoming outside air, in order to efficiently remove dust contained in the outside air with the outside air filter AF. From this viewpoint, as shown in Figure 4, in a plan view, it is desirable that the opening 50P to which the outside air filter AF is installed is located on the side wall portion 100RA side of the upper surface portion 50U. In other words, in a plan view, it is desirable that the opening 50P is located on one side of the upper surface portion 50U of the air conditioning unit 50.

[0087] [3. Supplement] The hydraulic excavator 1 may be configured to use both hydraulic equipment such as hydraulic actuators (e.g., hydraulic motors, hydraulic cylinders) and electrically driven actuators. Examples of electrically driven actuators include electric travel motors, electric cylinders, and electric slewing motors.

[0088] Hydraulic excavator 1 is configured to be equipped with an engine EG (see Figure 1) as the prime mover, but the prime mover may also be an electric motor.

[0089] In this embodiment, a hydraulic excavator 1 was used as an example of the work machine, but the work machine is not limited to a hydraulic excavator 1 and may be construction machinery such as a mobile crane. Furthermore, the work machine may be agricultural machinery such as a combine harvester or tractor.

[0090] [4. Addendum] The work machine described in this embodiment can be described as follows:

[0091] The work machines mentioned in Appendix (1) are: An air conditioning unit located in the cabin, on one side of the driver's seat and in front of it, A monitor positioned above the aforementioned air conditioning unit, A first frame that separates the front window located at the front of the cabin into upper and lower sections, The front portion comprises a second frame positioned to one side of the first frame and extending upward, In a front view, the monitor is positioned so as to overlap the first frame and the second frame.

[0092] The work machines in Appendix (2) are the work machines described in Appendix (1), The cabin has a side wall portion that is positioned on one side relative to the driver's seat, The air conditioning unit is positioned next to the side wall.

[0093] The work machines in Appendix (3) are the work machines described in Appendix (2), The system further comprises a beam section that supports the monitor, The beam portion is positioned to protrude from the side wall portion to the other side.

[0094] The work machines in Appendix (4) are the work machines described in Appendix (3), The side wall portion has a transverse frame that extends in the front-rear direction above the air conditioning unit. The beam section is fixed to the horizontal frame.

[0095] The work machines in Appendix (5) are the work machines described in Appendix (3) or (4), In a front view, the beam section has a beam body positioned below the first frame.

[0096] The work machine in Appendix (6) is the work machine described in any of Appendix (1) to (5), A wiper provided on the front window of the cabin, The system further comprises a wiper drive unit mounted on the front window and driving the wiper, In a front view, the monitor is positioned to overlap with the wiper drive unit.

[0097] The work machines specified in Appendix (7) are the work machines described in Appendix (6), The wiper drive unit is mounted on one side of the front window.

[0098] The work machine in Appendix (8) is the work machine described in any of Appendix (3) to (5), The aforementioned air conditioning device has an upper outlet, In a plan view, at least a portion of the upper air outlet is positioned on the driver's seat side relative to the monitor.

[0099] The work machines in Appendix (9) are the work machines described in Appendix (8), In a plan view, at least a portion of the upper air outlet is positioned on the driver's seat side relative to the beam.

[0100] The work machine in Appendix (10) is the work machine described in any of Appendix (1) to (9), The air conditioning unit has an opening on its upper surface through which an outside air filter, through which air taken in from outside the cabin passes, can be retracted. In a plan view, at least a portion of the monitor is positioned outside the opening.

[0101] The work machine in Appendix (11) is the work machine described in Appendix (10), In a plan view, at least a portion of the monitor is positioned behind the opening.

[0102] The work machine in Appendix (12) is the work machine described in Appendix (10) or (11), In a plan view, the monitor is positioned at an angle such that it faces the other side with respect to the front-to-back direction in which the opening extends.

[0103] The work machine in Appendix (13) is the work machine described in any of Appendix (10) to (12), In a plan view, the opening is located on one side of the upper surface of the air conditioning unit.

[0104] Although embodiments of the present invention have been described above, the scope of the present invention is not limited thereto, and it can be expanded or modified without departing from the spirit of the invention. [Industrial applicability]

[0105] This invention can be used, for example, in work machinery such as construction machinery and agricultural machinery. [Explanation of Symbols]

[0106] 1. Hydraulic excavator (working machine) 44a Driver's seat 50 Air conditioner 50P opening 50U top part 51 Top air outlet 60 monitors 70 Beam section 71 Beam body 100 cabins 100F front 100FW front window 100RA side wall part 100RA2 Horizontal Frame 110 Wiper drive unit AF outside air filter F1 Frame 1 F2 2nd Frame F3 3rd Frame WP Wiper

Claims

1. An air conditioning unit located in the cabin, on one side of the driver's seat and in front of it, A monitor positioned above the aforementioned air conditioning unit, A first frame that separates the front window located at the front of the cabin into upper and lower sections, The front portion comprises a second frame positioned on one side of the first frame and extending upward, A work machine in which, when viewed from the front, the monitor is positioned so as to overlap the first frame and the second frame.

2. The cabin has a side wall portion that is positioned on one side relative to the driver's seat, The work machine according to claim 1, wherein the air conditioning unit is located next to the side wall.

3. The system further comprises a beam section that supports the monitor, The working machine according to claim 2, wherein the beam portion is arranged to protrude from the side wall portion to the other side.

4. The side wall portion has a transverse frame that extends in the front-rear direction above the air conditioning unit. The beam portion is fixed to the horizontal frame, as described in claim 3.

5. The working machine according to claim 3, wherein, in a front view, the beam portion has a beam body positioned below the first frame.

6. A wiper provided on the front window of the cabin, The system further comprises a wiper drive unit mounted on the front window and driving the wiper, The work machine according to claim 1, wherein, in a front view, the monitor is positioned to overlap with the wiper drive unit.

7. The work machine according to claim 6, wherein the wiper drive unit is attached to one side of the front window.

8. The aforementioned air conditioning device has an upper outlet, The work machine according to claim 3, wherein, in a plan view, at least a portion of the upper air outlet is positioned on the driver's seat side relative to the monitor.

9. The work machine according to claim 8, wherein, in a plan view, at least a portion of the upper air outlet is positioned on the driver's seat side with respect to the beam.

10. The air conditioning unit has an opening on its upper surface through which an outside air filter, through which air taken in from outside the cabin passes, can be retracted. The work machine according to claim 1, wherein, in a plan view, at least a portion of the monitor is positioned outside the opening.

11. The work machine according to claim 10, wherein, in a plan view, at least a portion of the monitor is positioned rearward relative to the opening.

12. The work machine according to claim 10, wherein, in a plan view, the monitor is positioned at an angle to face the other side with respect to the front-to-back direction in which the opening extends.

13. In a plan view, the opening is located on one side of the upper surface of the air conditioning unit, as described in any one of claims 10 to 12.

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