Work machine

Abstract

The invention provides a work machine which can ensure comfort of an operator in a cab and can well ensure visibility of the front of the operator in a structure in which a monitor and an air conditioning device are arranged in the cab. This work machine is provided with: an air-conditioning device disposed on one side and in front of a driver seat in a cab; a monitor disposed above the air conditioning device; a first frame for vertically separating a front window disposed in the front of the cab; and a second frame disposed on one side of the front portion with respect to the first frame and extending upward. The monitor is disposed so as to overlap the first frame and the second frame in front view.

Description

Technical Field

[0001] This invention relates to work machinery. Background Technology

[0002] Previously, hydraulic excavators with monitors and air conditioning units installed inside the cab were known (see, for example, Patent Document 1).

[0003] Patent Document 1: Japanese Patent Application Publication No. 2022-152596

[0004] When a monitor is installed in the cab, it needs to be positioned further forward than the driver's seat to ensure visibility for the operator. However, in this configuration, the monitor obstructs the operator's forward view. Furthermore, the front of the cab (including the windshield) is located in front of the operator, and a frame exists within this frame. Therefore, a portion of the operator's forward view is also obstructed by this frame. Thus, when a monitor is installed in the cab, its placement must take the position of this frame into account to ensure good forward visibility for the operator. Additionally, if an air conditioning unit is also installed in the cab in addition to the monitor, operator comfort within the confined space of the cab must be ensured. Summary of the Invention

[0005] This invention was made to solve the above-mentioned problems, and its purpose is to provide a working machine that, in a structure in which a monitor and an air conditioning unit are installed in the cab, can ensure the comfort of the operator in the cab and can also ensure good visibility for the operator in front.

[0006] One aspect of the work machinery according to the present invention includes: an air conditioning unit disposed on one side and in front of the driver's seat in the cab; a monitor disposed above the air conditioning unit; a first frame separating the front window disposed in the front part of the cab vertically; and a second frame disposed on one side and extending upward in the front part relative to the first frame, wherein, when viewed from the front, the monitor is configured to overlap with the first frame and the second frame.

[0007] In a structure that includes a monitor and air conditioning unit in the cab, the operator's comfort can be ensured, and the operator's forward visibility can be well guaranteed. Attached Figure Description

[0008] Figure 1 This is a left-side view showing the schematic structure of a hydraulic excavator, which is an example of the working machinery of the present invention.

[0009] Figure 2This is a perspective view of the cab of the aforementioned hydraulic excavator from the right front.

[0010] Figure 3 This is a perspective view of the upper front window located at the front of the aforementioned cab.

[0011] Figure 4 It is a schematic representation of the use of inclusion. Figure 1 A top view of the internal structure of the cab when the horizontal plane of line AA cuts through the cab.

[0012] Figure 5 This is a three-dimensional view of the front right side of the aforementioned cab, viewed from the rear left.

[0013] Figure 6 This is a perspective view of the air conditioning unit and monitor installed in the aforementioned driver's cab, viewed from the left front.

[0014] Figure 7 This is the front view of the aforementioned driver's cab.

[0015] Figure 8 It was omitted. Figure 7 The diagram above shows the front view of the cab in the state of the front window.

[0016] Figure 9 It is a further omission Figure 8 The diagram shows the front view of the cab in the above-mentioned state, including the wipers and wiper drive unit.

[0017] Explanation of reference numerals in the attached figures

[0018] 1…Hydraulic excavator (operating machinery); 44a…Driver's seat; 50…Air conditioning unit; 50P…Opening; 50U…Upper surface; 51…Upper surface air outlet; 60…Monitor; 70…Beam; 71…Beam body; 100…Cab; 100F…Front; 100FW…Front window; 100RA…Side wall; 100RA2…Transverse frame; 110…Wipe drive unit; AF…External air filter; F1…First frame; F2…Second frame; F3…Third frame; WP…Wipes. Detailed Implementation

[0019] The embodiments of the present invention are described below based on the accompanying drawings.

[0020] [1. General Structure of the Operating Machinery]

[0021] Figure 1 This is a left-side view showing a schematic structure of a hydraulic excavator 1, an example of a working machine according to one embodiment of the present invention. The hydraulic excavator 1 includes a lower traveling body 2, a working body 3, and an upper slewing body 4.

[0022] In this embodiment, the directions are defined as follows. The direction facing the operator (driver, operator) seated in the driver's seat 44a located on the upper rotating body 4 is defined as "forward," and the opposite direction is defined as "rear." When the upper rotating body 4 is not rotated relative to the lower traveling body 2 (rotation angle is 0 degrees), the forward / backward direction of the upper rotating body 4 is the same as the forward / backward direction of the lower traveling body 2. The accompanying drawings show the hydraulic excavator 1 in the state where the upper rotating body 4 is not rotated relative to the lower traveling body 2. Furthermore, from the operator's perspective seated in the driver's seat 44a, the left side is defined as "left," and the right side as "right." Additionally, the direction of gravity perpendicular to both the forward / backward and left / right directions is defined as the up / down direction, with the upstream side of the gravity direction defined as "up," and the downstream side as "down." In the accompanying drawings, the front is indicated by the symbol "F", the rear by the symbol "B", the right by the symbol "R", the left by the symbol "L", the top by the symbol "U", and the bottom by the symbol "D", as needed.

[0023] The lower traveling body 2 includes a pair of left and right tracks 21, a pair of left and right travel motors 22, and a bulldozer blade 23. The left and right travel motors 22 drive the left and right tracks 21 respectively, thereby enabling the hydraulic excavator 1 to move forward and backward. The travel motors 22 are hydraulic motors. The bulldozer blade 23, used for leveling land and other operations, is located at the front of the lower traveling body 2. The bulldozer blade 23 rotates via a bulldozer blade cylinder (not shown). The bulldozer blade cylinder is a hydraulic cylinder.

[0024] The work machine 3 is equipped with a boom 31, a stick 32, and a bucket 33. It can perform excavation operations such as digging sand and soil by independently driving the boom 31, stick 32, and bucket 33.

[0025] The boom 31 includes a lower boom 31a, an upper boom 31b, and a stick strut 31c. The base end of the lower boom 31a is connected to the front right portion of the upper slewing body 4 in a manner that allows it to rotate in both vertical and horizontal directions. The front end of a boom cylinder (not shown) is connected to the front end of the lower boom 31a. The base end of the boom cylinder is connected to the front right portion of the upper slewing body 4. More specifically, the boom cylinder is positioned forward of the lower boom 31a. The boom cylinder is freely movable. When the boom cylinder extends or retracts, the lower boom 31a rotates relative to the upper slewing body 4 in both vertical and horizontal directions.

[0026] The base end of the upper boom 31b is connected to the front end of the lower boom 31a in a manner that allows rotation in the left and right directions. The stick support 31c is connected to the front end of the upper boom 31b in a manner that allows rotation in the left and right directions. The base end of the offset cylinder 31b1 is connected to the left side of the base end of the upper boom 31b. The front end of the offset cylinder 31b1 is connected to the left side of the stick support 31c. The offset cylinder 31b1 is freely movable. The left side of the stick support 31c and the left side of the front end of the lower boom 31a are connected by a connecting rod 31b2.

[0027] When the offset cylinder 31b1 extends or retracts, the upper boom 31b rotates in the left-right direction relative to the lower boom 31a, and the stick support bar 31c moves (offsets) in the left-right direction. At this time, the stick support bar 31c rotates in the left-right direction relative to the upper boom 31b. Thus, the stick support bar 31c moves in the left-right direction relative to the lower boom 31a, but does not rotate in the left-right direction.

[0028] The base end of the stick 32 is connected to the stick support bar 31c in a manner that allows it to rotate in the vertical and horizontal directions as well as the front and back directions. The front end of the stick cylinder 32a is connected to the base end of the stick 32. The middle part between the front end and the base end of the stick cylinder 32a is connected to the stick support bar 31c. The stick cylinder 32a is freely movable in both vertical and horizontal directions. When the stick cylinder 32a extends or retracts, the stick 32 rotates relative to the stick support bar 31c in both vertical and horizontal directions.

[0029] The bucket 33 is connected to the front end of the stick 32 in a manner that allows it to rotate in the vertical and horizontal directions as well as the front and back directions. The bucket 33 is also connected to the stick 32 via a bucket link 34. The base end of the bucket cylinder 33a is connected to the base end of the stick 32. The front end of the bucket cylinder 33a is connected to the bucket link 34. The bucket cylinder 33a is freely movable in both vertical and horizontal directions. When the bucket cylinder 33a extends or retracts, the bucket 33 rotates relative to the stick 32 in both vertical and horizontal directions.

[0030] The boom cylinder, offset cylinder 31b1, stick cylinder 32a, and bucket cylinder 33a are all composed of hydraulic cylinders.

[0031] The upper slewing body 4 is located above the lower traveling body 2 and is rotatably mounted relative to the lower traveling body 2 via a slewing bearing (not shown). The upper slewing body 4 includes a slewing frame 41, a slewing motor 42, a machine room 43, a driver's section 44, and a driver's cab 100. That is, the hydraulic excavator 1 includes a driver's cab 100.

[0032] The upper rotating body 4 rotates via the aforementioned slewing bearing by being driven by a slewing motor 42 disposed on the slewing frame 41. The slewing motor 42 is a hydraulic motor.

[0033] The engine EG is housed in the machine room 43. The engine EG is the drive source for the hydraulic excavator 1. The engine EG is made of a diesel engine, but is not limited to this; for example, it can also be made of a gasoline engine.

[0034] In the machine room 43, in addition to the engine EG, multiple hydraulic pumps (not shown) are also housed. These hydraulic pumps supply working oil (hydraulic fluid) to the hydraulic motors and hydraulic cylinders. The hydraulic motors include, for example, the left and right travel motor 22 and the swing motor 42. The hydraulic cylinders include, for example, the bulldozer blade cylinder, boom cylinder, offset cylinder 31b1, stick cylinder 32a, and bucket cylinder 33a. Furthermore, the hydraulic motors and hydraulic cylinders driven by the working oil are collectively referred to as hydraulic actuators.

[0035] The driver's unit 44 is located on the upper left side of the upper rotating body 4. More specifically, the driver's unit 44 is located near the left side of the work machine 3. A driver's seat 44a is provided in the driver's unit 44. A plurality of control components 44b are arranged around the driver's seat 44a. The plurality of control components 44b are configured to include levers, switches, pedals, etc. By having an operator sit in the driver's seat 44a and operate the plurality of control components 44b, the aforementioned hydraulic actuator is driven. As a result, the lower traveling body 2 can be moved, land leveling operations can be performed using the bulldozer blade 23, excavation operations can be performed using the work machine 3, and rotation of the upper rotating body 4 can be performed.

[0036] The cab 100 is configured to cover the driver's compartment 44. That is, the cab 100, like the driver's compartment 44, is located on the upper left side of the upper slewing body 4. The work machine 3 is located on the right side of the cab 100. The structure of the cab 100 will be described below.

[0037] [2. Structure of the driver's cab]

[0038] (2-1. Exterior structure of the cab)

[0039] Figure 2 This is a perspective view of the driver's cab 100 from the right front. The driver's cab 100 includes a front section 100F, a right side section 100R, and a rear section 100B (see reference). Figure 1 ), left side 100L (refer to) Figure 1 ), door 100D (reference) Figure 1 The cab 100 is configured with a bottom opening.

[0040] The front 100F is located in the cab 100 and is positioned in the driver's seat 44a (see reference). Figure 1 The front part 100F is positioned in front of the driver's seat 44a and covers it from the front. Since the front part 100F constitutes the front surface of the cab 100, it can also be referred to as the front surface section. The front part 100F is positioned between the right front pillar P1 and the left front pillar P5. Here, the right front pillar P1 is erected at the driver's seat 44 (see reference 44a). Figure 1 The left front pillar P5 is located on the lower right side of the driver's section 44 and extends upward.

[0041] A front window 100FW is provided at the front 100F. The front window 100FW is made of a transparent panel, such as glass. Thus, the operator seated in the driver's seat 44a can observe the road ahead through the front window 100FW. Alternatively, the transparent panel may be made of resin (e.g., polycarbonate). Further details regarding the front 100F will be described later.

[0042] The right side section 100R is located in the cab 100 to the right of the driver's seat 44a and covers the driver's seat 44a from the right side. Since the right side section 100R constitutes the right side face of the cab 100, it can also be referred to as the right side face. 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.

[0043] The side wall portion 100RA is positioned on the right side of the driver's seat 44a. Here, one side in the left-right direction is referred to as the "one-sided side," and the other side as the "other-sided side." Thus, it can be said that the cab 100 is positioned on the right side relative to the driver's seat 44a (in... Figure 2 In the example, the side wall portion 100RA is on the right side.

[0044] The side wall portion 100RA has a lower wall 100RA1 and a transverse frame 100RA2. The lower wall 100RA1 is a wall extending in both the front-to-back and vertical directions. An external air intake 100RA1p is provided in the lower wall 100RA1. The external air intake 100RA1p is for air conditioning unit 50 (see below) described later. Figure 5 (etc.) to draw air from outside the cab 100 (external air) into the interior opening. In this embodiment, there are two external air intake inlets 100RA1p, but the number is not particularly limited.

[0045] The transverse frame 100RA2 extends along the upper end of the lower wall 100RA1 in a front-to-back direction. The front end of the transverse frame 100RA2 connects to the upper and lower ends of the right front column P1. The rear end of the transverse frame 100RA2 connects to the lower end of the right rear column P2, which extends vertically. The right rear column P2 is erected in the machine room 43 (see reference). Figure 1 The upper surface of ).

[0046] The right window 100RW is positioned above the lower wall 100RA1 via a transverse frame 100RA2. The right window 100RW is made of a transparent panel, such as glass. This allows the operator to observe the right side from inside the cab 100 via the right window 100RW. Alternatively, the transparent panel may also be made of resin.

[0047] Two guide frames 100RG are configured on the right side of the right window 100RW. Each guide frame 100RG is mounted between the right front pillar P1 and the right rear pillar P2 in the longitudinal direction and is separately configured in the vertical direction. Each guide frame 100RG is designed to reinforce the cab 100 and ensure the safety of the operator. For example, even if the hydraulic excavator 1 were to overturn, the guide frames 100RG can prevent the operator from breaking through the right window 100RW and being thrown out of the cab 100. Furthermore, the number of guide frames 100RG is not limited to two; it can be one or more.

[0048] The rear section 100B is located in the cab 100 behind the driver's seat 44a and covers the driver's seat 44a from the rear. Since the rear section 100B forms the rear surface of the cab 100, it can also be referred to as the rear surface section. The rear section 100B is connected to the right side section 100R via the right rear pillar P2.

[0049] like Figure 1 As shown, 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 observe the rear from inside the cab 100 via the rear window 100BW. Alternatively, the transparent panel may be made of resin. The rear window 100BW is curved such that its left end is positioned further forward than its right end.

[0050] The left side portion 100L is positioned in the cab 100 behind and to the left of the driver's seat 44a, and covers the driver's seat 44a from the left rear. Since the left side portion 100L constitutes the left side face of the cab 100, it can also be referred to as the left side face. The left side portion 100L is connected to the rear portion 100B via a left rear pillar P3 extending vertically. The left rear pillar P3 is erected on the upper surface of the machine compartment 43.

[0051] like Figure 1 As shown, a central pillar P4 extending vertically is disposed between the left front pillar P5 and the left rear pillar P3. The left side 100L is connected to the central pillar P4 and the left rear pillar P3. Furthermore, when viewing the cab 100 from the rear, the central pillar P4 is positioned to the left (on the other side) than the left rear pillar P3.

[0052] The left side portion 100L includes a left window 100LW. The left window 100LW is positioned at an angle relative to the longitudinal direction, with its left end positioned further forward than its right end. The left window 100LW is made of a transparent panel, such as glass. This allows the operator to observe the left rear from inside the cab 100 via the left window 100LW. Alternatively, the transparent panel may also be made of resin.

[0053] Door 100D is located in the cab 100, to the left front of driver's seat 44a. Door 100D is rotatably supported on center pillar P4 in a forward-opening manner. The operator can move up and down relative to the driver's seat 44 by opening and closing door 100D.

[0054] like Figure 2 As shown, the upper part 100U is disposed above the driver's seat 44a in the cab 100 and covers the driver's seat 44a from above. Since the upper part 100U constitutes the upper surface of the cab 100, it is also referred to as the upper surface part.

[0055] 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 a right bend P1a. The other end of the upper pillar P6 is connected to the upper end of the left front pillar P5 via a left bend P5a. The upper pillar P6 is supported by the right rear pillar P2, the left rear pillar P3, and the center pillar P4. Therefore, the upper pillar P6 extends rearward from one end along the upper end of the right side part 100R, extends to the left along the upper end of the rear part 100B, and then extends to the left front along the upper end of the left side part 100L, passing above the door 100D and extending forward to the other end.

[0056] A metal roof panel 100U1 is provided on the upper part 100U. Furthermore, a sunroof 100UW is provided on the roof panel 100U1. The sunroof 100UW is made of a transparent panel, for example, made of transparent resin. Thus, the operator can observe the upper part from inside the cab 100 through the sunroof 100UW, for example, by confirming the operation of the work machine 3 through the sunroof 100UW. Alternatively, the sunroof 100UW can also be made of transparent glass.

[0057] (2-2. Detailed structure of the front part)

[0058] The aforementioned front window 100FW, located in the front part 100F of the cab 100, includes an upper front window 100FW1 and a lower front window 100FW2. The upper front window 100FW1 and the lower front window 100FW2 are separated by a first frame F1 extending in the left-right direction. In other words, the front window 100FW is separated into the upper front window 100FW1 and the lower front window 100FW2 by the first frame F1. Thus, the hydraulic excavator 1 has a first frame F1 in the front part 100F that separates the front window 100FW vertically.

[0059] The lower front window 100FW2 is located in front of the driver's seat 44a. The lower front window 100FW2 is supported by a groove (not shown) provided in the front part 100F and is configured to slide in the vertical direction.

[0060] The upper front window 100FW1 can change its position between a closed state and an open state via a linkage mechanism (not shown) installed in the cab 100. Here, the closed state of the upper front window 100FW1 refers to the state in which the upper front window 100FW1 is located in front of the driver's seat 44a, and is vertically opposed to the lower front window 100FW2 located in front of the driver's seat 44a via the first frame F1 (see reference). Figure 2 When closed, there is no gap or open space between the upper front window 100FW1 and the lower front window 100FW2. On the other hand, the open state of the upper front window 100FW1 means that the upper part of the upper front window 100FW1 moves backward and the lower part moves upward, and the area in front of the driver's seat 44a is opened, that is, an open space is formed between the upper front window 100FW1 and the lower front window 100FW2.

[0061] With the upper front window 100FW1 open, the lower front window 100FW2 can slide upwards because its upper part is open. By sliding the lower front window 100FW2 upwards, it can be removed from the aforementioned slot. When the lower front window 100FW2 is removed, the open space in front of the driver's seat 44a becomes larger. As a result, the operator can easily observe the work area in front of them over a wide area through this open space.

[0062] In addition to the first frame F1 mentioned above, the hydraulic excavator 1 also has a second frame F2, a third frame F3, and a fourth frame F4. The second frame F2 is positioned on one side of the front section 100F relative to the first frame F1 (in... Figure 2 In the example, it is the right side) and extends upwards. The second frame F2 is connected to the right front pillar P1. At the lower end of the second frame F2, there is a side extending to the other side (in... Figure 2 In the example, the right flexure F2a extends from the left side.

[0063] The third frame F3 is positioned on the opposite side of the first frame F1 in the front 100F (in... Figure 2 In the example, it's on the left side) and extends upwards. The third frame F3 connects to the left front pillar P5. A side section (in...) is provided at the lower end of the third frame F3. Figure 2 In the example, the left flexure F3a extends from the right side. The right flexure F2a and the left flexure F3a are arranged separately in the left-right direction, but they can also be connected to each other.

[0064] The fourth frame F4, located in the front part 100F, connects the upper ends of the second frame F2 and the third frame F3 in the left-right direction. The fourth frame F4 is fixed to a reinforcing frame (not shown) that connects the right bend P1a and the left bend P5a in the left-right direction. The fourth frame F4 is positioned further forward than the aforementioned reinforcing frame.

[0065] Figure 3 This is a perspective view of the upper front window 100FW1. The aforementioned first frame F1 is mounted on the lower edge DE of the upper front window 100FW1. The right end F1a and left end F1b of the first frame F1 are slidably supported by a guide (not shown) extending vertically within the cab 100. The right end F1a is supported by the second frame F2 (see reference). Figure 2 The second frame F2 overlaps with the right end F1a of the first frame F1. Additionally, the left end F1b is covered by the third frame F3 (see reference). Figure 2 It covers from the front. That is, the third frame F3 overlaps with the left end F1b of the first frame F1. The upper front window 100FW1 is formed into a pentagonal shape with the upper left part cut off, but it can also be formed into a quadrilateral shape without the cut-off part.

[0066] A wiper WP is mounted on the front side of the upper windshield 100FW1 (opposite to the driver's seat 44a). The lower end WPa, which serves as the pivot point for the wiper WP, is located on the right side of the upper windshield 100FW1, i.e., one side. On the other hand, a wiper drive unit 110 is mounted on the rear side of the upper windshield 100FW1 (driver's seat 44a side). The wiper drive unit 110 is a drive mechanism that drives the wiper WP and is configured to include a motor, etc. The wiper drive unit 110 is mounted on one side of the upper windshield 100FW1 and is connected to the wiper WP via a shaft. The aforementioned shaft is the rotation shaft of the wiper WP and is provided through the upper windshield 100FW1.

[0067] In this embodiment, a shaft is mounted on 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 rotating shaft can be mounted on the upper end WPb of the wiper WP, and the lower end WPa of the wiper WP rotates around the upper end WPb. Thus, the hydraulic excavator 1 of this embodiment includes a wiper WP installed on the front window 100FW of the cab 100, and a wiper drive unit 110 installed on the front window 100FW and driving the wiper WP. Moreover, the wiper drive unit 110 is installed on one side of the front window 100FW.

[0068] Figure 2The second frame F2, third frame F3, and fourth frame F4 shown are positioned further forward than the upper front window 100FW1 and the lower front window 100FW2. With the upper front window 100FW1 closed, the right edge RE and left edge LE of the upper front window 100FW1 (see reference) Figure 3 ) overlaps with the second frame F2 and the third frame F3 respectively, and the upper edge of the front upper window 100FW1 (refer to UE) Figure 3 The front lower window 100FW2 overlaps with the fourth frame F4. In addition, 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.

[0069] (2-3. Internal structure of the driver's cab)

[0070] Next, the internal structure of the driver's cab 100 will be described. Figure 4 It is a schematic representation of the use of inclusion. Figure 1 The AA line is a horizontal plane that cuts through the cab 100, representing a top view of the interior structure of the cab 100. Furthermore, the AA line is a horizontal line passing above the first frame F1. Figure 5 This is a perspective view of the front right side of the driver's cab 100, viewed from the rear left. Furthermore, in Figure 5 For convenience, the illustration of the right window 100RW has been omitted. Figure 6 This is a perspective view of the air conditioning unit 50 and monitor 60 installed in the driver's cab 100 when viewed from the left front.

[0071] 2-3-1. Control Components

[0072] like Figure 4 As shown, the driver's cab 100 is equipped with a right control lever 44b1, a left control lever 44b2, a function limiting lever 44b3, a pair of driving levers 44b4, and multiple pedals 44b5 as operating components 44b.

[0073] The right operating lever 44b1 is supported by the right control box 45R located on the right side 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 located on the left side of the driver's seat 44a. The function limiting lever 44b3 is used to switch 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 multiple pedals 44b5 are arranged in front of the driver's seat 44a.

[0074] 2-3-2. Air Conditioning Unit

[0075] An air conditioning unit 50 is located on the right front of the driver's seat 44a. That is, the hydraulic excavator 1 includes an air conditioning unit 50, which is located on one side and in front of the driver's seat 44a within the cab 100. The air conditioning unit 50 is approximately cuboid in shape and is located near the left side of the side wall 100RA (on the other side). The air conditioning unit 50 is located closer to the first frame F1 (refer to...). Figure 2 (Lower)

[0076] The air conditioning unit 50 contains equipment necessary for air conditioning (temperature adjustment of the air), such as an evaporator, a blower, and a heater core. An upper surface air outlet 51 is provided on the upper surface portion 50U of the air conditioning unit 50. That is, the air conditioning unit 50 has an upper surface air outlet 51. Furthermore, the number of upper surface air outlets 51 is not limited to one; there can be multiple outlets. On the left side portion 50L of the air conditioning unit 50, two side air outlets 52 are arranged side-by-side in the vertical direction at the front, and an air intake 53 is provided at the lower rear. Furthermore, the number of side air outlets 52 is not limited to two; there can be one or more. Additionally, the right side portion of the air conditioning unit 50 is opposite the side wall portion 100RA.

[0077] An outdoor unit 54 is located behind the driver's seat 44a and below the rear 100B (see reference). Figure 1 The outdoor unit 54 includes a compressor for compressing refrigerant and a condenser for heat exchange. By circulating the refrigerant between the air conditioning unit 50 and the outdoor unit 54, and exchanging heat in each of the evaporator of the air conditioning unit 50 and the condenser of the outdoor unit 54, air from the passenger compartment 100 (internal air) drawn from the air intake 53 of the air conditioning unit 50, or from the aforementioned external air intake 100RA1p (see reference...), is supplied with air from the passenger compartment 100 (internal air). Figure 2 The air (outdoor air) drawn into the air conditioning unit 50 is cooled. Then, driven by the blower, cold air is blown into the interior of the cab 100 from at least one of the upper surface outlet 51 and the side outlet 52. On the other hand, by circulating the coolant, which is hot in the engine EG, through the heater core and blowing air into the heater core, warm air is blown into the interior of the cab 100 from at least one of the upper surface outlet 51 and the side outlet 52.

[0078] On the upper surface portion 50U of the air conditioning unit 50, an opening 50P is provided forward of the upper surface outlet 51. The opening 50P is formed into a long rectangular strip extending in the front-to-back direction when viewed from above. An external air filter AF, approximately cuboid in shape, is installed in the opening 50P so that it can be pulled upwards. By pulling the installed external air filter AF upwards and removing it from the opening 50P, a new external air filter AF can be inserted into the opening 50P from above, allowing the external air filter AF to be replaced (see reference). Figure 6 ).

[0079] With the external air filter AF installed at the opening 50P, air is drawn from the outside of the cab 100 through the aforementioned external air intake 100RA1p (see reference). Figure 2 Air drawn into the air conditioning unit 50 passes through an external air filter AF. Clean air, having had dust removed by the external air filter AF, is then supplied to the interior of the air conditioning unit 50. Thus, the air conditioning unit 50 has an opening 50P on its upper surface 50U for the external air filter AF to be pulled out and installed.

[0080] 2-3-3. Monitor

[0081] A monitor 60 is disposed above the air conditioning unit 50. The monitor 60 is a display device that displays various information. For example, the monitor 60 displays various settings of the hydraulic excavator 1, fuel level, hourly rate, and images captured by a monitoring camera when it is equipped with a monitoring camera. The monitor 60 is disposed above the air conditioning unit 50 as follows.

[0082] like Figures 4-6 As shown, a beam 70 is fixed to the transverse frame 100RA2 included in the side wall portion 100RA of the right side portion 100R of the cab 100. The transverse frame 100RA2 extends in the front-rear direction above (at a height position) the air conditioning unit 50. The beam 70 has a beam body 71 and mounting braces 72 (see reference). Figure 5 The main beam 71 is fastened to the left side of the transverse frame 100RA2 by bolts or the like, and extends to the left. Thus, the beam 70 is arranged to extend from the side wall 100RA to the other side and is positioned above the air conditioning unit 50.

[0083] Mounting struts 72 are fixed to the upper surface of the beam body 71 by welding or the like. Monitor 60 is fixed to the mounting struts 72 of the beam 70 using bolts or the like. Thus, monitor 60 is positioned above the air conditioning unit 50, supported by the beam 70. In this way, the hydraulic excavator 1 includes a monitor 60 positioned above the air conditioning unit 50. Furthermore, the hydraulic excavator 1 includes a beam 70 that supports the monitor 60. Alternatively, the beam 70 can also be fixed to the transverse frame 100RA2 by other methods, such as hooking it to the transverse frame 100RA2.

[0084] By positioning the monitor 60 above the air conditioning unit 50, the space above the air conditioning unit 50 within the cab 100 is effectively utilized as the space for the monitor 60. Thus, even in a narrow interior space within the cab 100, the air conditioning unit 50 and the monitor 60 can be centrally (compactly in the vertical direction), ensuring operator comfort within the cab 100 and providing a comfortable interior space for utilizing the air conditioning unit 50.

[0085] Figure 7 This is the front view of the driver's cab 100 when viewed from the front. Figure 8 It was omitted. Figure 7 The diagram shows the front view of the cab 100 in the state of the front window 100FW. Figure 9 It is a further omission Figure 8 The illustration shows a front view of the cab 100 in its illustrated state, including the wiper WP and wiper drive unit 110. In this embodiment, as... Figure 8 and Figure 9 As shown, when viewed from the front, the monitor 60 is configured to overlap with the first frame F1 and the second frame F2. More specifically, when viewed from the front, the monitor 60 is configured to protrude upwards from the first frame F1. Additionally, when viewed from the front, the monitor 60 is configured to protrude to the left (the other side) from the second frame F2.

[0086] In a structure where a first frame F1 and a second frame F2 are configured at the front 100F of the cab 100, when the operator is seated in the driver's seat 44a, the first frame F1 and the second frame F2 are located in front of the operator. Therefore, a portion of the operator's forward field of vision is obstructed by the first frame F1 and the second frame F2. Figure 9 In the diagram, EP represents the operator's eye point during the design phase, D1 represents the line of sight of the operator seated in the driver's seat 44a through the front of the first frame F1, and D2 represents the line of sight through the front of the second frame F2 (in...). Figure 4 The same applies to the line of sight direction D2. In this case, the forward field of view of line of sight direction D1 is blocked by the first frame F1, and the forward field of view of line of sight direction D2 is blocked by the second frame F2.

[0087] Furthermore, in the cab 100, an air conditioning unit 50 is arranged to one side and in front of the driver's seat 44a, and a monitor 60 is arranged above the air conditioning unit 50. In this configuration, when the operator is seated in the driver's seat 44a, the monitor 60 is located diagonally in front of the operator (see reference). Figure 4 Thus, the operator can observe the monitor 60, and the visibility of the monitor 60 is ensured. On the other hand, part of the operator's forward field of vision is obstructed by the monitor 60.

[0088] like Figure 8 and Figure 9 As shown, in the configuration where the monitor 60 is arranged to overlap with the first frame F1 and the second frame F2 when viewed from the front, from the perspective of an operator seated in the driver's seat 44a, the monitor 60 is overlapped in the line of sight D1 across the first frame F1 and in the line of sight D2 across the second frame F2. Line of sight D1 and D2 are directions in which the operator's forward field of vision is originally obstructed by the first frame F1 and the second frame F2. Therefore, by overlapping the monitor 60 in the line of sight D1 and D2, the impact of the monitor 60's configuration on the operator's forward visibility can be reduced.

[0089] For example, if the monitor 60 is configured separately (without overlapping) from the first frame F1 and the second frame F2 when viewed from the front, the area of ​​the operator's forward view that is obstructed is simply the sum of the areas of the forward view obstructed by the first frame F1 and the second frame F2 and the area of ​​the forward view obstructed by the monitor 60. In contrast, in this embodiment, since the areas of the operator's forward view obstructed by the first frame F1 and the second frame F2 partially overlap with the areas of the operator's forward view obstructed by the monitor 60, the total area of ​​the area obstructed by the operator's forward view can be reduced compared to a structure where the monitor 60 is configured separately from the first frame F1 and the second frame F2 when viewed from the front. Therefore, the impact of the monitor 60's configuration on the operator's forward view can be reduced. As a result, even with a structure where the monitor 60 is configured inside the cab 100, good forward visibility for the operator can be ensured.

[0090] In particular, in the hydraulic excavator 1 of this embodiment, an air conditioning unit 50 is arranged next to the side wall portion 100RA of the cab 100, and a monitor 60 is arranged above the air conditioning unit 50. In such a structure of the hydraulic excavator 1, when viewed from the front, the monitor 60 is arranged to overlap with the first frame F1 and the second frame F2, thereby effectively achieving the aforementioned effect.

[0091] In a structure where the monitor 60 is positioned above the air conditioning unit 50, if the beam 70 supporting the monitor 60 can be positioned close to the side wall 100RA, it is easy to position the monitor 60 so that it overlaps with the second frame F2 when viewed from the front. From the viewpoint of positioning the beam 70 close to the side wall 100RA, the beam 70 is preferably positioned so that it extends from the side wall 100RA to the other side.

[0092] From the viewpoint of positioning the monitor 60 within the cab 100 at a height easily observed by the operator, it is preferable to fix the beam 70 to the transverse frame 100RA2, which extends in the front-rear direction and is located above the air conditioning unit 50. Furthermore, it is preferable to support the monitor 60 by means of the beam 70 fixed to the transverse frame 100RA2.

[0093] The beam portion 70 has a beam body 71, thereby allowing the monitor 60 to be positioned above the beam body 71 via mounting supports 72, as described above. To ensure that the monitor 60 reliably overlaps with the first frame F1 when viewed from the front, the beam body 71, preferably positioned below the monitor 60, is configured in relation to the first frame F1 as follows. That is, as... Figure 8 and Figure 9 As shown, when viewed from the front, the main beam 71 is preferably positioned below the first frame F1.

[0094] exist Figure 9 In the middle, it is represented by a dashed line. Figure 8 The external shape of the wiper drive unit 110 is shown. Furthermore, the line of sight through the wiper drive unit 110, as observed by the operator seated in the driver's seat 44a, is designated as D3. Figure 9 As shown, in this embodiment, when viewed from the front, the monitor 60 is configured to overlap with the wiper drive unit 110. Furthermore, in Figure 9 In this configuration, when viewed from the front, a portion of the monitor 60 overlaps with the wiper drive unit 110, but the entire monitor 60 can also overlap with the wiper drive unit 110. When the monitor 60 is configured in this way, from the perspective of the operator seated in the driver's seat 44a, in the line of sight D3 through the wiper drive unit 110—that is, in the direction in which the operator's forward view is originally obstructed by the wiper drive unit 110—the monitor 60, which also obstructs the forward view, is overlapped. Therefore, compared to a structure in which the monitor 60 is configured not to overlap with the line of sight D3 (a structure in which the monitor 60 is separately configured from the wiper drive unit 110 when viewed from the front), the configuration of the monitor 60 has less impact on forward visibility, and forward visibility can be well ensured.

[0095] To minimize the impact of the monitor 60's configuration on forward visibility, it is preferable that the monitor 60, the second frame F2, and the wiper drive unit 110 are all simultaneously overlapped when viewed from the front. To achieve this monitor 60 configuration, it is preferable that the wiper drive unit 110 is positioned on the same side as the second frame F2, which is positioned on one side, when viewed from the front. That is, the wiper drive unit 110 is preferably mounted on one side of the front window 100FW.

[0096] like Figure 4 As shown, in this embodiment, when viewed from above, a portion of the upper surface air outlet 51 of the air conditioning unit 50 is positioned relative to the monitor 60 on the driver's seat 44a side (rear), and the remaining portion of the upper surface air outlet 51 overlaps with the monitor 60. Alternatively, when viewed from above, the entire upper surface air outlet 51 may be positioned relative to the monitor 60 on the driver's seat 44a side.

[0097] To reliably ensure a comfortable interior space within the driver's cab 100 utilizing the air conditioning unit 50, it is preferable that the air (e.g., cold air) blown from the upper surface outlet 51 of the air conditioning unit 50 toward the driver's seat 44a is not obstructed as much as possible by the monitor 60 positioned above the air conditioning unit 50. From this perspective, as in this embodiment, it is preferable that, when viewed from above, at least a portion of the upper surface outlet 51 of the air conditioning unit 50 is positioned (offset) toward the driver's seat 44a relative to the monitor 60.

[0098] like Figure 4 As shown, in this embodiment, when viewed from above, the entire upper surface air outlet 51 of the air conditioning unit 50 is offset relative to the beam 70 towards the driver's seat 44a. Alternatively, when viewed from above, a portion of the upper surface air outlet 51 may overlap with the beam 70, while the remaining portion of the upper surface air outlet 51 may be offset relative to the beam 70 towards the driver's seat 44a.

[0099] Thus, when viewed from above, at least a portion of the upper surface air outlet 51 is positioned relative to the beam 70 toward the driver's seat 44a (offset), it is easy to achieve a structure in which at least a portion of the upper surface air outlet 51 is positioned relative to the monitor 60 supported by the beam 70 on the driver's seat 44a side.

[0100] like Figure 4 As shown, in this embodiment, when viewed from above, 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, when viewed from above, the entire monitor 60 may be positioned outside the opening 50P.

[0101] Thus, when viewed from above, with at least a portion of the monitor 60 positioned outside the opening 50P, the possibility of interference between the external air filter AF and the monitor 60 is reduced when the external air filter AF is inserted or removed relative to the opening 50P, as it is located above the opening 50P. This simplifies the replacement and maintenance of the external air filter AF.

[0102] In this embodiment, when viewed from above, at least a portion of the monitor 60 is positioned rearward relative to the opening 50P. With this configuration of the monitor 60, the operator's visibility of the monitor is improved because it is positioned close to the driver's seat 44a.

[0103] In this embodiment, when viewed from above, the monitor 60 is tilted towards the left side (i.e., the other side) in the front-back direction relative to the opening 50P (especially referring to...). Figure 4 In this tilted configuration of the monitor 60, the display screen of the monitor 60 faces inward toward the cab 100 (e.g., the driver's seat 44a side) in the front-to-back direction. Therefore, the operator seated in the driver's seat 44a can easily observe the display screen of the monitor 60. Furthermore, when viewed from above, the opening 50P extends in the front-to-back direction, making it easy to remove or insert the external air filter AF along the side wall 100RA of the cab 100 relative to the opening 50P, thus facilitating the replacement of the external air filter AF.

[0104] As in this embodiment, an external air intake 100RA1p is provided in the side wall portion 100RA of the cab 100 to draw external air from the outside of the cab 100 into the interior structure. From the perspective of efficiently removing dust contained in the external air using the external air filter AF, it is preferable to position the external air filter AF as upstream as possible in the flow path of the drawn-in external air. From this viewpoint, as... Figure 4 As shown, when viewed from above, the opening 50P for mounting the external air filter AF is preferably located on the side wall 100RA side of the upper surface portion 50U. That is, when viewed from above, the opening 50P is preferably located on one side of the upper surface portion 50U of the air conditioning unit 50.

[0105] [3. Supplement]

[0106] The hydraulic excavator 1 can also be a structure that combines hydraulic devices such as hydraulic actuators (e.g., hydraulic motors, hydraulic cylinders) with electrically driven actuators. Electrically driven actuators include, for example, electric travel motors, electric cylinders, and electric swing motors.

[0107] Hydraulic excavator 1 is equipped with engine EG (refer to...) Figure 1It serves as the structure of a prime mover, but a prime mover can also be an electric motor.

[0108] In this embodiment, a hydraulic excavator 1 is used as an example of the working machinery, but the working machinery is not limited to a hydraulic excavator 1, and may also be construction machinery such as a mobile crane. In addition, the working machinery may also be agricultural machinery such as a combine harvester or a tractor.

[0109] [4. Postscript]

[0110] The operating machinery described in this embodiment can be represented by the following notes.

[0111] The operating machinery in Appendix (1) includes:

[0112] The air conditioning unit is located on one side and in front of the driver's seat in the driver's cabin.

[0113] A monitor is positioned above the aforementioned air conditioning unit;

[0114] The first frame separates the front window, located at the front of the aforementioned cab, vertically; and

[0115] The second frame, in the aforementioned front portion, is disposed on one side relative to the aforementioned first frame and extends upward therefrom.

[0116] When viewed from the front, the monitor is configured to overlap with the first frame and the second frame.

[0117] The working machinery configuration in Appendix (2) is based on the working machinery described in Appendix (1).

[0118] The aforementioned cab has a side wall portion disposed on the aforementioned side relative to the aforementioned driver's seat.

[0119] The aforementioned air conditioning unit is located next to the aforementioned side wall portion.

[0120] The working machinery configuration in Appendix (3) is based on the working machinery described in Appendix (2).

[0121] It also has a beam to support the aforementioned monitor.

[0122] The aforementioned beam extends from the aforementioned side wall portion to the other side.

[0123] The working machinery configuration in Appendix (4) is based on the working machinery described in Appendix (3).

[0124] The aforementioned side wall portion has a transverse frame extending in the front-to-back direction above the aforementioned air conditioning unit.

[0125] The aforementioned beam is fixed to the aforementioned transverse frame.

[0126] The working machinery configuration in Appendix (5) is based on the working machinery described in Appendix (3) or (4),

[0127] When viewed from the front, the aforementioned beam section has a main beam body positioned below the aforementioned first frame.

[0128] The working machinery configuration in Appendix (6) is based on the working machinery described in any of the appendices (1) to (5),

[0129] It also has:

[0130] Windshield wipers, mounted on the aforementioned windshield of the aforementioned cab; and

[0131] A wiper drive unit is mounted on the aforementioned windshield and drives the aforementioned wipers.

[0132] When viewed from the front, the monitor is configured to overlap with the wiper drive unit.

[0133] The working machinery configuration in Appendix (7) is based on the working machinery described in Appendix (6).

[0134] The aforementioned wiper drive unit is installed on the aforementioned side of the aforementioned front window.

[0135] The working machinery configuration in Appendix (8) is based on the working machinery described in any of Appendix (3) to (5),

[0136] The aforementioned air conditioning unit has an air outlet on its upper surface.

[0137] When viewed from above, at least a portion of the air outlet on the upper surface is positioned relative to the monitor on the driver's seat side.

[0138] The working machinery configuration in Appendix (9) is based on the working machinery described in Appendix (8).

[0139] When viewed from above, at least a portion of the air outlet on the upper surface is positioned relative to the beam on the side of the driver's seat.

[0140] The operating machinery configuration in Appendix (10) is based on the operating machinery described in any of the appendices (1) to (9),

[0141] The aforementioned air conditioning unit has an opening on its upper surface for the installation of a pull-out external air filter. Air drawn into the air conditioning unit from outside the driver's cab passes through the external air filter.

[0142] When viewed from above, at least a portion of the aforementioned monitor is positioned outside the aforementioned opening.

[0143] The working machinery configuration in Appendix (11) is based on the working machinery described in Appendix (10),

[0144] When viewed from above, at least a portion of the aforementioned monitor is positioned rearward relative to the aforementioned opening.

[0145] The working machinery configuration in Appendix (12) is based on the working machinery described in Appendix (10) or (11),

[0146] When viewed from above, the monitor is tilted toward the other side in the front-back direction relative to the opening.

[0147] The operating machinery configuration in Appendix (13) is based on the operating machinery described in any of the appendices (10) to (12),

[0148] When viewed from above, the opening is located on one side of the upper surface of the air conditioning unit.

[0149] The embodiments of the present invention have been described above, but the scope of the present invention is not limited thereto, and it can be implemented by expanding or modifying it within the scope of the spirit of the invention.

[0150] Industrial applicability

[0151] This invention can be applied to operational machinery such as engineering machinery and agricultural machinery.

Claims

1. A type of operating machinery, wherein, have: The air conditioning unit is located on one side and in front of the driver's seat in the driver's cabin. A monitor is positioned above the air conditioning unit; The first frame separates the front window, which is located at the front of the cab, vertically. as well as The second frame, disposed on one side of the front portion relative to the first frame and extending upward thereon, When viewed from the front, the monitor is configured to overlap with the first frame and the second frame.

2. The operating machinery according to claim 1, wherein, The cab has a side wall portion disposed on one side relative to the driver's seat. The air conditioning unit is located next to the side wall.

3. The operating machinery according to claim 2, wherein, It also has a beam to support the monitor. The beam is configured to extend from the side wall portion to the other side.

4. The operating machinery according to claim 3, wherein, The side wall portion has a transverse frame extending in the front-to-back direction above the air conditioning unit. The beam is fixed to the transverse frame.

5. The operating machinery according to claim 3, wherein, When viewed from the front, the beam section has a beam body disposed below the first frame.

6. The operating machinery according to claim 1, wherein, It also has: Windshield wipers, located on the front window of the driver's cab; and A wiper drive unit, mounted on the front window and driving the wipers. When viewed from the front, the monitor is configured to overlap with the wiper drive unit.

7. The operating machinery according to claim 6, wherein, The wiper drive unit is mounted on one side of the front window.

8. The operating machinery according to claim 3, wherein, The air conditioning unit has an air outlet on its upper surface. When viewed from above, at least a portion of the air outlet on the upper surface is positioned relative to the monitor on the driver's seat side.

9. The operating machinery according to claim 8, wherein, When viewed from above, at least a portion of the upper surface air outlet is positioned relative to the beam on the driver's seat side.

10. The operating machinery according to claim 1, wherein, The air conditioning unit has an opening on its upper surface for the retractable installation of an external air filter. Air drawn into the air conditioning unit from outside the cab passes through the external air filter. When viewed from above, at least a portion of the monitor is positioned outside the opening.

11. The operating machinery according to claim 10, wherein, When viewed from above, at least a portion of the monitor is positioned rearward relative to the opening.

12. The operating machinery according to claim 10, wherein, When viewed from above, the monitor is tilted toward the opposite side in the front-back direction relative to the opening.

13. The operating machinery according to any one of claims 10 to 12, wherein, When viewed from above, the opening is located on one side of the upper surface portion of the air conditioning unit.

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