Work machine

Abstract

Provided is a work machine that makes it possible to reliably ascertain the state of work from an operator's seat without interfering with the operation of a boom during work.　A work machine (1) comprises: a machine body (2); an operator's seat (7) that is mounted on the machine body (2); a work device (4) that is provided with a boom (16) which is capable of swinging in front of the machine body (2); and a front camera (70) that images an area in front of the machine body (2). The boom (16) is disposed displaced to one side in the width direction of the machine body (2) with respect to the operator's seat (7). The front camera (70) is disposed at a lower part of the machine body (2) and to one side in the width direction with respect to the boom (16).

Description

Work machine

[0001] The present invention relates to a work machine such as a backhoe.

[0002] Conventionally, a work machine disclosed in Patent Document 1 below is known. The work machine disclosed in Patent Document 1 includes an upper revolving body, a cab mounted on the upper revolving body, a working device having a boom extending forward of the upper revolving body, and a camera that photographs the front of the upper revolving body. The camera is attached to the upper part of the cab.

[0003] Japanese Patent Laid-Open Gazette "JP-A-2008-121280"

[0004] In the above-described work machine, since the camera is attached to the upper part of the cab and the boom is arranged on the right side of the cab, the right side of the camera may be blocked by the boom due to the vertical movement of the boom, and it may be difficult to surely grasp the working situation including the situation on the right side of the boom from the driver's seat during work.

[0005] The present invention has been made in view of the above problems, and an object thereof is to provide a work machine that can surely grasp the working situation from the driver's seat without being hindered by the operation of the boom during work.

[0006] A work machine according to an embodiment of the present invention includes a machine body, a driver's seat mounted on the machine body, a working device having a boom that can swing vertically in front of the machine body, and a front camera that photographs the front of the machine body. The boom is disposed offset to one side in the width direction of the machine body with respect to the driver's seat, and the front camera is disposed at the lower front part of the machine body and on one side in the width direction with respect to the boom.

[0007] According to the work machine of the present invention, since the front camera is disposed at the lower front part of the machine body and on one side in the width direction of the machine body with respect to the boom (the side where the view from the driver's seat is blocked by the boom), it is possible to surely grasp the working situation from the driver's seat without being hindered by the operation of the boom during work.

[0008] This is a right side view of the work machine. This is a front view of the work machine. This is a top view of the work machine. This is a rear view of the work machine. This figure shows the arrangement of cooling fans, coolers (radiators, oil coolers, etc.), condensers, electric fans, ducts, etc. in the engine compartment. This is a perspective view showing the shroud, radiator, oil cooler, ducts, condensers, electric fans, etc. This is an exploded perspective view of Figure 6. This is a front perspective view of the duct. This is a rear perspective view of the duct. This figure shows the mounting structure of the condenser and electric fan to the duct. This figure shows the mounting structure of the condenser and electric fan. This figure shows the state with the first bonnet opened from the state shown in Figure 5. This figure shows the airflow inside the duct. This figure shows the airflow when a partition plate is installed inside the duct. This is a front view showing the front lower part of the machine. This is a perspective view showing the swing bracket and front camera. This is a side view showing the swing bracket and front camera. This figure shows a method of attaching the front camera to the swing bracket via a mounting member. This figure shows the front camera housed in the camera case. This is a side view showing an example of the shooting direction of the front camera and the shooting range of the side camera and rear camera. This is a side view showing the height positions of the front camera, side camera, and rear camera. This is a cross-sectional view taken along line A-A in Figure 21. This is a side view showing an example of the shooting range of the side camera and rear camera. This is a front view of the lower part of the weight in which the rear camera is located. This is a cross-sectional view taken along line B-B in Figure 24. This is a diagram showing an example of images captured by the side camera and rear camera displayed on a display device. This is a perspective view showing an example of a modified mounting structure for attaching the front camera to the aircraft. This is a perspective view showing the structure of the camera mounting bracket. This is an exploded view showing the structure of the camera mounting bracket. This is a plan view showing how the mounting angle of the front camera relative to the camera mounting bracket has been changed.

[0009] Hereinafter, preferred embodiments of the present invention will be described with appropriate reference to the drawings. In this embodiment, a backhoe, which is a slewing work machine, is exemplified as the work machine 1. However, the work machine 1 is not limited to a backhoe.

[0010] Figure 1 is a right side view of the work machine 1. Figure 2 is a front view of the work machine 1. Figure 3 is a top view of the work machine 1. Figure 4 is a rear view of the work machine 1. As shown in Figures 1 to 4, the work machine 1 comprises a machine body (turntable) 2, a traveling device 3, and a work device 4. Note that in Figures 2 and 4, a part of the work device 4 is omitted, and in Figure 3, the work device 4 is represented by dashed lines.

[0011] The machine body 2 is equipped with a driver's seat 7 in which the operator (driver) sits, and a cabin 8 which is a driver's seat protector that protects the driver's seat 7. However, the work machine 1 may have a canopy instead of a cabin 8 as a driver's seat protector.

[0012] In the following, the direction towards the front of the operator seated in the operator's seat 7 of the work machine 1 (arrow A1 direction) will be described as the front, and the direction towards the rear of the operator (arrow A2 direction) will be described as the rear. The direction towards the left of the operator (arrow B1 direction) will be described as the left, and the direction towards the right of the operator (arrow B2 direction) will be described as the right. The horizontal direction (left-right direction), which is perpendicular to the front-rear direction K1, will be described as the machine width direction K2. The direction from the center of the machine body 2 toward the right or left will be described as the machine outward direction, and the direction opposite to the machine outward direction will be described as the machine inward direction. In other words, the machine outward direction is the machine width direction and is the direction away from the center of the machine width direction, and the machine inward direction is the machine width direction and is the direction approaching the center of the machine width direction.

[0013] The running gear 3 is a crawler-type running gear that supports the machine body 2 so that it can move. The running gear 3 has a left running gear 3L that supports the lower left part of the machine body 2 and a right running gear 3R that supports the lower right part of the machine body 2. In this embodiment, a crawler-type running gear 3 is used, but the running gear 3 is not limited to this, and a wheel-type running gear or the like may also be used. A dozer device 9 is mounted on the front of the running gear 3.

[0014] As shown in Figure 1, the aircraft body 2 is supported on the running gear 3 via a slewing bearing 10 so as to be able to rotatably around a slewing axis X1, which is an axis extending in the vertical direction. As shown in Figures 1 to 4, the cabin 8 is mounted on the left side of the aircraft body 2. More specifically, the cabin 8 is mounted to the left of the center of the aircraft body 2 in the left-right direction (aircraft width direction) and in front of the center of the aircraft body 2 in the front-rear direction.

[0015] As shown in Figures 1 to 3, the machine body 2 has a support member 13 that supports the work device 4. The support member 13 is provided at the front of the machine body 2. The support member 13 includes a support bracket 14 and a swing bracket 15. The support bracket 14 is provided on a base plate (swivel base plate) 11 which is located below the driver's seat 7 and constitutes the bottom of the machine body 2. The support bracket 14 is provided so as to protrude forward from the base plate 11. The swing bracket 15 is attached to the front of the support bracket 14. The swing bracket 15 is attached to the support bracket 14 so as to be able to swing around a vertical axis (an axis extending in the vertical direction).

[0016] As shown in Figures 1 and 2, the working device 4 is mounted on the front of the machine body 2. The working device 4 has a boom 16, an arm 17, and a bucket 18. The machine body 2 has a swing bracket 15, which is a support member 13 that supports the base end of the boom 16. The base end of the boom 16 is pivotally attached to the upper part of the swing bracket 15 so as to be rotatable around a horizontal axis (an axis extending in the machine body width direction K2). As a result, the boom 16 can swing up and down in front of the machine body 2. The arm 17 is pivotally attached to the tip side of the boom 16 so as to be rotatable around a horizontal axis. The bucket 18 is provided on the tip side of the arm 17 so as to be able to perform scooping and dumping operations.

[0017] The work device 4 can be fitted with other work tools (hydraulic attachments) that can be driven by a hydraulic actuator, either in place of or in addition to the bucket 18. Examples of other work tools include hydraulic breakers, hydraulic crushers, angle brooms, earth augers, pallet forks, sweepers, mowers, snow blowers, and the like.

[0018] The swing bracket 15 is made swingable by the extension and retraction of the swing cylinder C1. The boom 16 is made swingable by the extension and retraction of the boom cylinder C2. The arm 17 is made swingable by the extension and retraction of the arm cylinder C3. The bucket 18 is made capable of scooping and dumping operations by the extension and retraction of the bucket cylinder C4. The swing cylinder C1, boom cylinder C2, arm cylinder C3, and bucket cylinder C4 are composed of hydraulic cylinders (hydraulic actuators).

[0019] As shown in Figures 1 and 4, the work machine 1 is equipped with a weight 12 that forms the rear of the machine body 2. The weight 12 is a counterweight for adjusting the front-to-rear weight balance with the work device 4 provided at the front of the machine body 2. The weight 12 is located at the lower part of the machine body 2, near the center in the width direction of the machine body.

[0020] As shown in Figure 3, the prime mover 20 is mounted on the right side of the aircraft body 2. The prime mover 20 is located in a prime mover chamber 21 provided on the right side of the aircraft body 2. The prime mover 20 is a diesel engine. The prime mover 20 may also be a gasoline engine or an electric motor, or it may be a hybrid type having both an engine and an electric motor.

[0021] A cooling fan 22 is attached to the front of the prime mover 20. The cooling fan 22 is driven by the prime mover 20. The cooling fan 22 generates cooling air that flows from outside the aircraft body 2 toward the prime mover 20. The cooling fan 22 is a suction-type fan that draws in air (outside air) from outside the aircraft body 2 and brings it into the prime mover chamber 21.

[0022] In front of the cooling fan 22 are the radiator 23, oil cooler 24, condenser 25, receiver 26, and electric fan 27. The cooling fan 22, radiator 23, oil cooler 24, condenser 25, receiver 26, and electric fan 27 are all located inside the engine compartment 21.

[0023] The radiator 23 is a cooler for cooling the prime mover 20, and cools the coolant used to cool the prime mover 20. The oil cooler 24 is a cooler for cooling the hydraulic fluid that drives the work device 4, and cools the hydraulic fluid that returns from hydraulic actuators such as hydraulic cylinders and hydraulic motors.

[0024] The condenser 25 and receiver 26, together with the compressor (not shown), etc., constitute part of the air conditioning system (air conditioner) equipped on the work machine 1. The condenser 25 is a device that dissipates heat from the refrigerant from the compressor and liquefies it, and is a cooler that cools the refrigerant, which has been made semi-liquid by the compressor, to promote liquefaction. In this embodiment, the condenser 25 is an electric condenser that is cooled by an electric fan 27. The receiver 26 is a device that stores the refrigerant liquefied in the condenser 25, and separates the refrigerant that could not be liquefied in the condenser 25 from the liquefied refrigerant, and removes moisture and impurities.

[0025] The work machine 1 is equipped with a bonnet 30 that forms the outer surface of the machine body 2. The bonnet 30 forms the outer surface of the engine chamber 21 in which the prime mover 20 is located. The bonnet 30 includes a first bonnet 31, a second bonnet 32, a third bonnet 33, a fourth bonnet 34, and a fifth bonnet 35.

[0026] The first bonnet 31 has a front portion 31a that covers the front of the engine chamber 21 and an upper portion 31b that covers the top of the engine chamber 21. The second bonnet 32 ​​is positioned behind the first bonnet 31 and covers the top of the engine chamber 21. The third bonnet 33 is positioned behind the second bonnet 32 ​​and covers the top of the engine chamber 21. The fourth bonnet 34 covers the front side (right side) of the engine chamber 21. The fifth bonnet 35 is positioned behind the fourth bonnet 34 and covers the side (right side) of the engine chamber 21.

[0027] As shown in Figures 1 and 2, a cover 36 is provided between the substrate 11 and the bonnet 30. The cover 36 has a first portion 36a located below the front portion 31a of the first bonnet 31, and a second portion 36b located below the fourth bonnet 34 and the fifth bonnet 35. The cover 36 covers the side (right side) and front of the engine chamber 21 between the substrate 11 and the bonnet 30.

[0028] The bonnet 30 and cover 36 are provided with openings for taking in outside air into the engine chamber 21. The openings include a first opening 41, a second opening 42, and a third opening 43. The first opening 41 is located in the upper part 31b of the first bonnet 31 and opens above the engine chamber 21. The second opening 42 is located in the fourth bonnet 34 and opens to the side (right) of the engine chamber 21. The third opening 43 is located in the first part 36a of the cover 36 and opens in front of the engine chamber 21. The third opening 43 is located in the lower front part of the aircraft body 2 (more specifically, the lower right front part). Mesh plates are fitted into the first opening 41, the second opening 42, and the third opening 43.

[0029] As shown in Figure 3, the prime mover 20, cooling fan 22, and coolers (radiator 23, oil cooler 24) are arranged in a line from rear to front of the aircraft body 2. Specifically, they are arranged in the order of prime mover 20, cooling fan 22, radiator 23, and oil cooler 24 from rear to front. As shown in Figure 5, the condenser 25 is located in front of (more specifically, below and to the front of) the coolers (radiator 23, oil cooler 24).

[0030] As shown in Figures 2 and 3, the condenser 25 is located at the front lower part of the body 2. More specifically, the condenser 25 is located at the front lower part of the right side of the body 2. In front of the condenser 25 is the first portion 36a of the cover 36. The condenser 25 is positioned facing the third opening 43 provided in the first portion 36a. The third opening 43 is an exhaust section that discharges outside air that has passed through the condenser 25 through a duct 45 (described later) to the outside.

[0031] As shown in Figure 5, the first portion 36a of the cover 36 is inclined to move backward as it goes downward. As a result, the lower right portion of the machine body 2 formed by the first portion 36a is inclined to move backward as it goes downward. The third opening (discharge section) 43 provided in the first portion 36a is inclined to move backward as it goes downward. The mesh plate 69 attached to the third opening 43 is also inclined to move backward as it goes downward. The condenser 25 is positioned behind the third opening 43, inclined to move backward as it goes downward.

[0032] As shown in Figure 5, the work machine 1 is equipped with a duct 45 that guides outside air taken into the motor chamber 21 from outside the machine body 2 by the drive of a cooling fan 22. As shown in Figures 5 to 9, the duct 45 is equipped with an outside air introduction section 46 into which outside air is introduced by the drive of the cooling fan 22. The outside air introduction section 46 includes a first outside air introduction section 47 and a second outside air introduction section 48.

[0033] The first outside air intake section 47 is located at the top of the duct 45. As shown in Figure 5, the first outside air intake section 47 is positioned to correspond to the first opening 41 (see Figures 2 and 3) and introduces outside air from the top of the machine body 2. A mesh plate 68 is attached to the first opening 41. The outside air taken into the engine chamber 21 from the first opening 41 is introduced into the duct 45 from the first outside air intake section 47.

[0034] The first outside air intake 47 is located in the upper right part of the duct 45. The second outside air intake 48 is positioned to correspond to the second opening 42 (see Figures 1 and 2) and introduces outside air from the side (right side) of the machine body 2. The outside air taken into the engine chamber 21 through the second opening 42 is introduced into the duct 45 through the second outside air intake 48.

[0035] The duct 45 has a first air guide section 51 that guides outside air introduced from the outside air inlet 46 to the cooler (radiator 23, oil cooler 24), and a second air guide section 52 that guides outside air introduced from the outside air inlet 46 to the condenser 25. In Figure 5, the part to the left (rear) of the boundary line L1 shown by the dashed line is the first air guide section 51, and the part to the right (front) of the boundary line L1 is the second air guide section 52. In other words, the first air guide section 51 is at the front of the duct 45, and the second air guide section 52 is at the rear of the duct 45. Note that the position of the boundary line L1 shown in Figure 5 is an example, and the position of the boundary line L1 is not strictly defined and may deviate from the illustrated position.

[0036] The duct 45 has a first air guide section 51 and a second air guide section 52 integrated into one. In other words, the first air guide section 51 and the second air guide section 52 are integrated to form a single duct 45. That is, the work machine 1 is not provided with the ducts constituting the first air guide section 51 and the ducts constituting the second air guide section 52 separately. The first air guide section 51 and the second air guide section 52 are in communication inside a single duct 45.

[0037] The duct 45 has a first portion 53 which constitutes at least a part of the first air guide section 51, and a second portion 54 which constitutes at least a part of the second air guide section 52. The first portion 53 constitutes the upper part of the duct 45. The second portion 54 constitutes the lower part of the duct 45. In this embodiment, the first portion 53 constitutes the upper part of the first air guide section 51 and the upper part of the second air guide section 52. The second portion 54 constitutes the lower part of the first air guide section 51 and the lower part of the second air guide section 52. The second portion 54 occupies a larger proportion of the second air guide section 52 compared to the first portion 53.

[0038] As shown in Figure 5, the first portion 53 is attached to the lower surface of the first bonnet 31. The second portion 54 is attached to the upper surface of the substrate 11. A sealing material (trim) 55 is interposed between the first portion 53 and the second portion 54. The first portion 53 and the second portion 54 are continuous via the sealing material 55. As will be described later, the first portion 53 and the second portion 54 are separable.

[0039] As shown in Figures 8 and 9, the first portion 53 has a first upper plate portion 53a, a first right plate portion 53b, a first left plate portion 53c, and a first front plate portion 53d. The first upper plate portion 53a is provided with an opening that constitutes the first outside air intake portion 47. The first right plate portion 53b extends downward from the right end of the first upper plate portion 53a. The first left plate portion 53c extends downward from the left end of the first upper plate portion 53a. The first front plate portion 53d extends downward from the front end of the first upper plate portion 53a.

[0040] The second section 54 has a second front plate section 54a, a second right plate section 54b, and a second left plate section 54c. The second front plate section 54a is positioned below the first front plate section 53d. A sealing material 55 is interposed between the first front plate section 53d and the second front plate section 54a. The second right plate section 54b extends rearward from the right end of the second front plate section 54a. The second left plate section 54c extends rearward from the left end of the second front plate section 54a.

[0041] The first right plate portion 53b has a first inclined edge 53e that transitions forward as it extends downward. The second right plate portion 54b has a second inclined edge 54d that transitions backward as it extends downward. The left edge 53f of the first front plate portion 53d connects the lower end of the first inclined edge 53e and the lower end of the second inclined edge 54d and extends in the vertical direction. As a result, the duct 45 forms a bent edge 45a where the first inclined edge 53e, the left edge 53f of the first front plate portion 53d, and the second inclined edge 54d are bent so as to be convex toward the front (see Figure 8). As shown in Figures 6 and 7, the bent edge 45a of the duct 45 is bent so as to be convex toward the front of the oil cooler 24. As a result, the bent edge 45a constitutes a second outside air introduction portion 48 that can guide outside air between the bent edge 45a and the front of the oil cooler 24.

[0042] As shown in FIGS. 8 to 10, a capacitor placement portion 57 for placing the capacitor 25 is provided at the lower part of the second portion 54 of the duct 45. The capacitor placement portion 57 has a lower plate 57a, a left upright portion 57b that stands upward from the left front part of the lower plate 57a, a right upright portion 57c that stands upward from the right front part of the lower plate 57a, and a rear upright portion 57d that stands upward from the rear part of the lower plate 57a. A receiver 26 is attached to the right part of the right upright portion 57c (see FIGS. 6 and 10).

[0043] As shown in FIG. 5, the lower plate 57a of the capacitor placement portion 57 is fixed on the substrate 11. As shown in FIG. 10, a holding bracket 58 for holding the electric fan 27 is attached to the left upright portion 57b and the right upright portion 57c. As shown in FIGS. 8 and 9, the rear upright portion 57d is located behind and below the second front plate portion 54a. Thereby, a ventilation port 59 through which air can flow is formed between the rear upright portion 57d and the second front plate portion 54a.

[0044] As shown in FIG. 11, the capacitor 25 is attached to the rear part of a holding bracket 58 for holding the electric fan 27. As shown in FIG. 10, when the holding bracket 58 is attached to the capacitor placement portion 57, the capacitor 25 is attached to the duct 45 at the front lower part of the right part of the machine body 2.

[0045] As shown in FIG. 5, the capacitor 25 is arranged behind (specifically, rearward and upward) the electric fan 27. Further, the capacitor 25 is arranged in front of the rear upright portion 57d of the duct 45 and in front of and below the ventilation port 59. The capacitor 25 is arranged at a position lower than that of the coolers (radiator 23, oil cooler 24). The electric fan 27 is arranged at the lower right part of the machine body 2 in front of (specifically, frontward and downward) the capacitor 25.

[0046] As shown in FIG. 11, the holding bracket 58 holds a plurality (two) of electric fans 27 arranged side by side in the left-right direction. The holding bracket 58 is attached to the third opening 43 provided in the first part 36a of the cover 36 so that the electric fan 27 faces the third opening 43 (see FIGS. 2 and 5). Thereby, the electric fan 27 and the capacitor 25 are arranged at the lower front part (specifically, the lower right front part) of the machine body 2. The electric fan 27 is arranged on the outer side of the machine body 2 of the capacitor 25 (specifically, the front side of the capacitor 25).

[0047] As shown in FIG. 5, the electric fan 27 and the capacitor 25 are arranged below the core surface 23a of the radiator 23 and the core surface 24a of the oil cooler 24. Also, the electric fan 27 and the capacitor 25 are arranged below the cooling fan 22.

[0048] As shown in FIGS. 6 and 7, the working machine 1 includes a shroud 60 that surrounds the periphery of the cooling fan 22. A mounting plate 61 is provided at the front part of the shroud 60, and the radiator 23 is attached to the front part of this mounting plate 61. A holding frame 63 that holds the periphery of the radiator 23 is provided around the radiator 23.

[0049] As shown in FIG. 7, the oil cooler 24 is supported by a support bracket 62. The support bracket 62 has a first attachment part 62a attached to the radiator 23 and a second attachment part 62b attached to the substrate 11.

[0050] As shown in FIG. 9, a first sealing material 65 and a second sealing material 66 are attached to the rear surface of the duct 45. The first sealing material 65 is attached to the first part 53 of the duct 45. The first sealing material 65 may be an integral body continuous with the sealing material 55 interposed between the first part 53 and the second part 54, or may be a separate body from the sealing material 55. The first sealing material 65 is arranged to abut against the upper part 63a of the front surface of the holding frame 63 (see FIG. 7). The second sealing material 66 is attached to the second part 54 of the duct 45 and is arranged to abut against the lower part 63b of the front surface of the holding frame 63 (see FIG. 7).

[0051] As shown in Figure 12, the first bonnet 31 is configured to be openable upwards. The rear of the first bonnet 31 and the front of the second bonnet 32 ​​are connected via a hinge (not shown), and the first bonnet 31 can be opened upwards with the hinge axis as the pivot point.

[0052] As described above, the first portion 53 of the duct 45 is attached to the underside of the first bonnet 31. Furthermore, the first portion 53 is separable from the second portion 54. Therefore, when the first bonnet 31 is opened, the first portion 53 separates from the second portion 54 and moves (rises) together with the first bonnet 31. In other words, by opening the first bonnet 31, the first portion 53 of the duct 45 can be separated from the second portion 54.

[0053] This allows access to the coolers (radiator 23, oil cooler 24) from the front of the machine body 2, making maintenance of the coolers easier. Considering maintainability in this way, it is preferable that the first portion 53 and the second portion 54 of the duct 45 are separable. However, in the work machine 1, the first portion 53 and the second portion 54 of the duct 45 may be formed as a single unit and not separable.

[0054] Figure 13 shows the airflow within the engine chamber 21 using arrows. When the cooling fan 22 and the electric fan 27 are driven (rotating), air (outside air) is drawn into the engine chamber 21 through the first opening 41 and the second opening 42 (see Figures 1 and 2). The outside air introduced into the engine chamber 21 through the first opening 41 is then introduced into the duct 45 through the first outside air inlet 47. The outside air introduced into the engine chamber 21 through the second opening 42 is then introduced into the duct 45 through the second outside air inlet 48 (see Figure 6).

[0055] A portion of the outside air introduced into the duct 45 from the first outside air intake 47 and the second outside air intake 48 (see arrow F1) is guided by the suction force of the cooling fan 22 through the first air guide 51 to the cooler (oil cooler 24, radiator 23), and after passing through the cooler, it cools the prime mover 20 located behind the cooling fan 22. The outside air, after cooling the prime mover 20, is discharged to the outside of the machine body 2 through an opening (not shown) formed in the substrate 11.

[0056] A portion of the remaining outside air (see arrow F2) introduced into the duct 45 from the first outside air intake 47 and the second outside air intake 48 is guided by the suction force of the electric fan 27 through the second air guide 52 to the condenser 25 via the vent 59, passes through the condenser 25 and is discharged to the outside of the machine body 2 through the third opening 43.

[0057] As shown in Figure 14, the work machine 1 may be equipped with a partition plate 67 that divides the internal space of the duct 45 into a first air guide section 51 and a second air guide section 52. The partition plate 67 is a plate having surfaces that extend substantially in the vertical direction and substantially in the horizontal direction. The partition plate 67 is positioned below the first opening 41 and to the left of the second opening 42. The partition plate 67 is positioned so as to allow the outside air introduced from the first opening 41 and the second opening 42 to flow separately into the first air guide section 51 and the second air guide section 52. Therefore, the partition plate 67 is positioned so as to divide the first opening 41 into two when viewed from above, and so as to divide the second opening 42 into two when viewed from the side.

[0058] The partition plate 67 is attached to the duct 45. The partition plate 67 may be attached to the first portion 53 of the duct 45 or to the second portion 54. When the partition plate 67 is attached to the first portion 53, it can be configured so that when the first bonnet 31 is opened, the partition plate 67 moves together with the first bonnet 31.

[0059] The partition plate 67 may be attached to the duct 45 in a way that allows its orientation to be changed. For example, the partition plate 67 can be pivotally supported at its upper or lower part on the duct 45, allowing its orientation to be changed using the pivoted portion as a fulcrum (see arrow M). This makes it possible to change (adjust) the area of ​​the first air guide section 51 and the area of ​​the second air guide section 52 of the duct 45, which are separated by the partition plate 67, as needed. This makes it possible to adjust the heat balance in the engine chamber 21 to a good degree.

[0060] As shown in Figures 1 to 3 and Figure 15, the work machine 1 is equipped with a camera 70 that photographs the front of the machine body 2. For the sake of convenience, the camera 70 will be referred to as the "front camera 70" below. The front camera 70 is located inside the camera case 71.

[0061] The front camera 70 is positioned at the front lower part of the machine body 2. The front camera 70 is positioned on one side (right side) of the width direction of the machine body 2 relative to the boom 16. The boom 16 is positioned offset to one side (right side) of the width direction of the machine body 2 relative to the driver's seat 7. In other words, the work machine 1 has the boom 16 positioned on one side (right side) of the width direction of the machine body relative to the driver's seat 7, and the front camera 70 is positioned on one side (right side) of the width direction of the machine body relative to the boom 16.

[0062] The front camera 70 can photograph the area to the right and in front of the boom 16, which is positioned to the right of the driver's seat 7. This allows the front camera 70 to photograph the area that is obscured from view by the boom 16 by the operator seated in the driver's seat 7 (i.e., the area that is a blind spot for the operator seated in the driver's seat 7).

[0063] As shown in Figures 2 and 3, the front camera 70 is positioned on one side (right side) of the aircraft body 2 in the width direction relative to the cabin 8. The front camera 70 is positioned below the driver's seat 7 inside the cabin 8. The front camera 70 is positioned below the lower edge 8a of the cabin 8 (see Figure 2) or at approximately the same height as the lower edge 8a. The front camera 70 is positioned in front of the first portion 36a of the cover 36.

[0064] As shown in Figures 1 to 3 and Figure 15, the front camera 70 is attached to a support member 13 that supports the base end of the boom 16. Specifically, the front camera 70 is attached to a swing bracket 15. The swing bracket 15 is attached to a support bracket 14 provided at the front of the machine body 2, and the machine body 2 is rotatable around its vertical axis. Therefore, the front camera 70 can rotate together with the machine body 2 around its vertical axis.

[0065] Furthermore, the swing bracket 15 is pivotable around its vertical axis relative to the support bracket 14. Therefore, the front camera 70 can rotate together with the swing bracket 15 around its vertical axis relative to the support bracket 14. In addition, the front camera 70 can rotate together with the swing bracket 15 around its vertical axis relative to the aircraft body 2.

[0066] The front camera 70 is positioned to the side of the swing bracket 15. More specifically, the front camera 70 is positioned to the right of the swing bracket 15. As shown in Figure 2, the left-right center line CL1 of the light-receiving portion 70a (see Figure 15) of the front camera 70 is located to the right of the base end portion 16a of the boom 16. The light-receiving portion is the part that takes in light (light that generates an image) into the camera during shooting, and specifically includes a lens (a light-gathering lens).

[0067] As shown in Figure 16, the swing bracket 15 has a first pivot 15a, a second pivot 15b, a third pivot 15c, and a fourth pivot 15d. The first pivot 15a is located at the rear of the swing bracket 15, and a first pin 72 (see Figure 3) is inserted into it for pivoting to the support bracket 14. The second pivot 15b is located on the left side of the swing bracket 15, and a second pin 73 (see Figure 3) is inserted into it for pivoting to the tip of the swing cylinder C1. The third pivot 15c is located at the front of the swing bracket 15, and a third pin 74 (see Figure 1) is inserted into it for pivoting to the base end of the boom cylinder C2. The fourth pivot 15d is located at the top of the swing bracket 15, and a fourth pin 75 (see Figure 1) is inserted into it for pivoting to the base end of the boom 16.

[0068] As shown in Figure 17, the vertical position of the front camera 70 overlaps with the vertical position of the first pin 72 inserted into the first pivot 15a. Therefore, as shown in Figure 1, the vertical position of the front camera 70 overlaps with the vertical position of the support bracket 14 to which the first pivot 15a is pivotally supported by the first pin 72. As shown in Figures 15 and 17, the front camera 70 is positioned above the axis 74a of the third pin 74 inserted into the third pivot 15c.

[0069] As shown in Figure 17, the front camera 70 is positioned below the fourth pivot 15d. This means the front camera 70 is positioned below the base end 16a of the boom 16 (see Figures 1 and 2). As shown in Figure 17, the front camera 70 is positioned in front of the first pivot 15a. Furthermore, the front camera 70 is positioned in front of the fourth pivot 15d and behind the third pivot 15c.

[0070] As shown in Figures 15 to 18, the front camera 70 is attached to the swing bracket 15 by a mounting member 77. The mounting member 77 has a side plate portion 77a that is positioned along the side (right side) of the swing bracket 15 and a lower plate portion 77b that is positioned along the lower surface of the swing bracket 15. The front camera 70 is attached to the side plate portion 77a of the mounting member 77 via a camera case 71. More specifically, the front camera 70 is attached to the right side of the side plate portion 77a of the mounting member 77.

[0071] The side plate portion 77a is attached to the side (right side) of the swing bracket 15 by bolt BL1. The lower plate portion 77b is attached to the lower surface of the swing bracket 15 by bolt BL2. As a result, the mounting member 77 is attached to the side and lower surface of the swing bracket 15. With the mounting member 77 attached to the swing bracket 15, the front camera 70 is attached to the swing bracket 15.

[0072] As shown in Figures 17 and 19, the camera case 71 has a front plate 71a located in front of the front camera 70, a rear plate 71b located behind the front camera 70, an upper plate 71c located above the front camera 70, a side plate 71d located to the side (right) of the front camera 70, and a lower plate 71e located below the front camera 70. Figure 19 shows the state with the front plate 71a removed.

[0073] As shown in Figure 19, the lower plate 71e is provided with a mounting portion 71f which is attached to the side plate portion 77a of the mounting member 77. The front camera 70 is attached to either the rear plate 71b or the lower plate 71e. The lower plate 71e has a first notch 71g at a position facing the light-receiving portion 70a of the front camera 70. The rear plate 71b has a second notch 71h through which wiring 78 connected to the front camera 70 passes.

[0074] As shown in Figures 17 and 19, the front camera 70 is positioned facing forward and downward. More specifically, the light-receiving part 70a of the front camera 70 is positioned facing forward and downward. In Figure 20, the orientation (shooting direction) of the front camera 70 in a side view is indicated by arrow D1. As shown in Figure 20, the front camera 70 can photograph the ground GL in front of the traveling device 3. Therefore, when the work device 4 performs ground work such as excavation, the work area can be photographed. Note that the shooting direction indicated by the arrow in Figure 20 is just an example, and the angle of the shooting direction relative to the ground GL can be adjusted as appropriate by changing the mounting angle of the front camera 70.

[0075] As shown in Figure 3, the front camera 70 is positioned so as to be parallel or nearly parallel to the side surface 16b of the boom 16 when viewed from above. In Figure 3, the direction (shooting direction) of the front camera 70 when viewed from above is indicated by arrow D2. By positioning the front camera 70 in this way, the shooting direction D2 of the front camera 70 is nearly parallel to the line of sight of the operator seated in the driver's seat 7, so that the image captured by the front camera 70 is close to the scene imagined by the operator.

[0076] In the embodiment described above, the front camera 70 is attached to the swing bracket 15, but the work machine 1 may not have a swing bracket 15. In this case, the front camera 70 can be attached to the support bracket 14 that supports the base end of the boom 16. In this case, the front camera 70 is attached to the side (right side) of the support bracket 14 by a mounting member 77 of an appropriate shape. As a result, the front camera 70 is positioned to the side (right side) of the support bracket 14.

[0077] Furthermore, although the work machine 1 in the above-described embodiment is a slewing work machine in which the base end of the boom 16 is positioned in front of the driver's seat 7, it may also be a slewing work machine (ultra-short slewing machine) in which the base end of the boom 16 is positioned to the side (right) of the driver's seat 7. In this case, the front camera 70 is attached to the right front of the machine body 2 (for example, the first part 36a of the cover 36) at a different position from the support member 13 (support bracket 14, swing bracket 15).

[0078] As shown in Figure 3, a display device 79 is located inside the cabin 8. The display device 79 is positioned to the right and in front of the driver's seat 7. The display device 79 displays images captured by the front camera 70. This allows the operator seated in the driver's seat 7 to check the blind spots from the driver's seat 7 (particularly the front and lower right side of the boom 16) by looking at the images displayed on the display device 79.

[0079] As shown in Figure 1, the work machine 1 is equipped with a first camera 80 that photographs the area around the machine body 2. The first camera 80 photographs the side (right side) of the machine body 2. For the sake of explanation, the first camera 80 will be referred to as the "side camera 80" below. The side camera 80 is located on the fifth bonnet 35, which forms the side (right side) of the machine body 2.

[0080] As shown in Figures 1, 3, and 21, the fifth bonnet 35 has an openable and closable door 35a. The door 35a can be opened outward (to the right) from the main body 35b of the fifth bonnet 35, with the rear as the pivot point. By opening the door 35a, it is possible to access the engine compartment 21.

[0081] As shown in Figure 22, the fifth bonnet 35 has an outer wall 37 that constitutes the outer surface (side) of the aircraft body 2, and an inner wall 38 provided inside the outer wall 37. Specifically, the door 35a of the fifth bonnet 35 has an outer wall 37 and an inner wall 38. The side camera 80 is positioned between the outer wall 37 and the inner wall 38. The outer wall 37 and the inner wall 38 are spaced apart in the aircraft body width direction K2. As a result, a space S1 is formed between the outer wall 37 and the inner wall 38, and the side camera 80 is positioned in this space S1.

[0082] The outer wall 37 has a recess 37a that is indented toward the inside of the aircraft body 2 (towards the inner wall 38). The recess 37a has a first inclined surface 37b that transitions toward the inside of the aircraft (to the left) as it goes downward, and a second inclined surface 37c that transitions toward the outside of the aircraft (to the right) as it goes downward. The upper end of the second inclined surface 37c is continuous with the lower end of the first inclined surface 37b. An opening 37d is formed in the first inclined surface 37b. As shown in Figure 21, the width (width in the front-to-back direction) of the recess 37a increases as it goes downward from the opening 37d. The recess 37a is formed in an isosceles trapezoidal shape, with the lower side being longer than the upper side.

[0083] As shown in Figure 22, the side camera 80 is attached to the outer wall 37 via a mounting bracket 81. The mounting bracket 81 has a fixing member 81a fixed to the inner surface of the outer wall 37 and a mounting member 81b to which the side camera 80 is attached. The mounting member 81b is detachably attached to the fixing member 81a by a bolt BL3.

[0084] The inner wall 38 has an inner wall recess 38a that is recessed toward the inside of the aircraft body 2 (inward towards the aircraft body) at a position opposite to the recess 37a. The inner wall recess 38a is provided at a position opposite to the first inclined surface 37b. The space S1 formed between the outer wall 37 and the inner wall 38 is widened in the portion where the inner wall recess 38a is provided. The side camera 80 and mounting fixture 81 are arranged in this widened portion.

[0085] As shown in Figure 22, the side camera 80 is positioned in the recess 37a. More specifically, the light-receiving portion 80a of the side camera 80 is positioned in the opening 37d formed in the recess 37a. Because the light-receiving portion 80a of the side camera 80 is positioned in the opening 37d, the side camera 80 can photograph the outside of the aircraft body 2 (outside the outer wall 37) through the opening 37d. Furthermore, the side camera 80 does not protrude outward from the outer wall 37 that constitutes the outer surface of the aircraft body 2. In other words, the side camera 80 is located inside the aircraft (to the left) relative to the outer surface (right side) of the fifth bonnet 35.

[0086] As shown in Figure 22, the side camera 80 is positioned facing outward and downward from the aircraft body 2. More specifically, the light-receiving part 80a of the side camera 80 is positioned facing outward and downward from the aircraft body 2. Specifically, the light-receiving part 80a of the side camera 80 is positioned facing downward and to the right of the fifth bonnet 35. This allows the side camera 80 to photograph the downward and to the right of the aircraft body 2.

[0087] As shown in Figure 21, the side camera 80 is positioned below the door 35a of the fifth bonnet 35. The side camera 80 is positioned below the vertical center CL2 of the fifth bonnet 35. The side camera 80 is positioned below the lower end of the boom 16. The vertical position of the side camera 80 overlaps with the vertical position of the support bracket 14.

[0088] Thus, the side camera 80 is positioned low and facing downwards to the right. This prevents a blind spot from occurring in the vicinity of the lower right side of the aircraft 2, which is outside the field of view of the side camera 80.

[0089] Figures 20 and 23 show examples of the shooting range R1 of the side camera 80. As shown in Figure 20, the light-receiving part 80a of the side camera 80 is positioned in the opening 37d formed in the recess 37a, and the width of the recess 37a widens as it extends downward from the opening 37d. Therefore, the side camera 80 can secure a shooting range R1 that extends widely downward. As shown in Figure 23, the side camera 80 is positioned at a low position, and the light-receiving part 80a is positioned in the recess 37a and faces downward to the right, so it can photograph the lower right side of the aircraft body 2.

[0090] As shown in Figures 20 and 23, the side camera 80 can include at least a portion of the running gear 3 in its shooting range R1. More specifically, the side camera 80 can include the right running gear 3R in its shooting range R1. More specifically, it can include a portion of the crawler (track) of the crawler-type right running gear 3R in its shooting range R1. This allows the operator to intuitively and quickly grasp the shooting position from the image captured by the side camera 80 (an image showing a portion of the crawler). As a result, it becomes possible to easily and accurately maneuver the machine 2 to the side.

[0091] The work machine 1 has its cabin 8 located on the left side of the body 2, and its side camera 80 located on the right side of the body 2. In addition, since the prime mover 20 is located on the right side of the body 2, the body 2 has a shape that bulges to the right to secure space for the prime mover 20. As a result, it is difficult for the operator seated in the driver's seat 7 of the cabin 8 to see the lower right side of the body 2, but they can understand the situation in the lower right side of the body 2 by looking at the images captured by the side camera 80.

[0092] As shown in Figures 4, 20, and 23, the work machine 1 is equipped with a second camera 85 that photographs the area around the machine body 2. The second camera 85 photographs the area behind the machine body 2. For the sake of explanation, the second camera 85 will be referred to as the "rear camera 85" below. The rear camera 85 is located inside the weight 12 that constitutes the rear of the machine body 2.

[0093] As shown in Figures 20, 24, and 25, the weight 12 has a rear plate portion 12a and a lower plate portion 12b. The rear plate portion 12a constitutes the rear surface of the machine body 2. The lower plate portion 12b is positioned above the base plate 11 and extends horizontally forward from the lower part of the rear plate portion 12a. The weight 12 has a hollow portion 12c. The hollow portion 12c has a first through portion 12d that penetrates the rear plate portion 12a in the front-rear direction, a second through portion 12e that penetrates the lower plate portion 12b in the up-down direction, and a connecting portion 12f that connects the first through portion 12d and the second through portion 12e.

[0094] The rear camera 85 is located within the hollow portion 12c of the weight 12. The rear camera 85 is supported within the hollow portion 12c of the weight 12 by a support body 86. The support body 86 has a lower portion 86a, an intermediate portion 86b, and an upper portion 86c. The lower portion 86a is attached to the lower surface of the lower plate portion 12b by bolts BL4. The intermediate portion 86b extends upward from the upper surface of the lower portion 86a through the second through portion 12e and the communication portion 12f. The upper portion 86c extends rearward from the upper end of the intermediate portion 86b through the first through portion 12d. The rear camera 85 is attached to the upper portion 86c.

[0095] As shown in Figure 24, an extension plate 86d extending laterally (to the right) is provided at the intermediate portion 86b of the support 86. The weight 12 has a recessed portion 12g that is recessed toward the rear. The front surface 12g1 and the left surface 12g2 of the recessed portion 12g face the cavity 12c. The rear surface of the extension plate 86d abuts against the front surface 12g1 of the recessed portion 12g. This prevents the support 86 from tilting backward.

[0096] As shown in Figures 23 and 25, the weight 12 has a second recess 12h that is recessed toward the inside (forward) of the aircraft body 2. A second opening 12i is formed in the second recess 12h. The second opening 12i is connected to the first penetration 12d. The width (width in the left-right direction) of the second recess 12h increases as it extends downward from the second opening 12i. The second recess 12h is formed in an isosceles trapezoidal shape, with the lower side being longer than the upper side.

[0097] The rear camera 85 is positioned in the second recess 12h. More specifically, the light-receiving portion 85a of the rear camera 85 is positioned in the second opening 12i formed in the second recess 12h. Because the light-receiving portion 85a of the rear camera 85 is positioned in the second opening 12i, the rear camera 85 can photograph the outside (rear) of the aircraft 2 through the second opening 12i. Furthermore, the rear camera 85 does not protrude rearward from the weight 12 that constitutes the outer surface (rear surface) of the aircraft 2. In other words, the rear camera 85 is positioned in front of the rear surface of the weight 12.

[0098] As shown in Figure 25, the rear camera 85 is positioned facing outward and downward towards the aircraft 2. More specifically, the light-receiving part 85a of the rear camera 85 is positioned facing outward and downward towards the aircraft 2. In other words, the light-receiving part 85a of the rear camera 85 is positioned facing downward and rearward. This allows the rear camera 85 to photograph the area below and rearward towards the aircraft 2. Also, as shown in Figure 4, the rear camera 85 is positioned below the vertical center CL3 of the aircraft 2. Furthermore, as shown in Figures 4 and 21, the rear camera 85 is positioned below the vertical center CL4 of the weight 12. In this way, because the rear camera 85 is positioned low and facing downward and rearward, it is possible to prevent blind spots from occurring in the vicinity of the lower rear of the aircraft 2 that are outside the shooting range of the rear camera 85.

[0099] Figures 20 and 23 show examples of the shooting range R2 of the rear camera 85. As shown in Figure 20, the rear camera 85 is positioned at a low position, and its light-receiving part 85a is located in the second recess 12h and faces downward and rearward, so it can photograph the lower vicinity of the rear of the aircraft 2. As shown in Figure 23, the light-receiving part 85a of the rear camera 85 is located in the second opening 12i formed in the second recess 12h, and the width of the second recess 12h widens as it extends downward from the second opening 12i, so the rear camera 85 can secure a shooting range R2 that extends widely downward.

[0100] As shown by the dashed line L2 in Figure 21, the side camera 80 and the rear camera 85 are positioned at the same height. Therefore, the height of the shooting range of the side camera 80 and the height of the shooting range of the rear camera 85 can be made approximately the same. This allows the operator to view the images captured by the side camera 80 and the images captured by the rear camera 85 with the same sense of perspective, making it easy to grasp the surrounding situation from the captured images.

[0101] As shown in Figure 26, the screen 79a of the display device 79 (see Figure 3) has a first display unit 79b that displays the image IM1 captured by the side camera 80 and a second display unit 79c that displays the image IM2 captured by the rear camera 85. Therefore, the display device 79 can display the image IM1 captured by the side camera 80 and the image IM2 captured by the rear camera 85 on the screen 79a.

[0102] This allows the operator seated in the driver's seat 7 to check the blind spots from the driver's seat 7, which are captured by the side camera 80 and the rear camera 85, by viewing the images displayed on the display device 79.

[0103] In the example shown in Figure 26, the left side of the image IM1 captured by the side camera 80 shows a part of the fifth bonnet 35 (lower right) and a part of the right running gear 3R (crawler) of the aircraft body 2. The front of the image IM2 captured by the rear camera 85 shows a part of the weight 12 (lower rear) of the aircraft body 2 and parts of the right running gear 3R and left running gear 3L (crawler).

[0104] As shown in Figure 26, the screen 79a of the display device 79 has a first display unit 79b and a second display unit 79c arranged side by side. In the illustrated example, the first display unit 79b and the second display unit 79c are arranged side by side in the front-to-back direction, but they may also be arranged side by side in the left-to-right direction.

[0105] When displaying the image IM1 captured by the side camera 80 and the image IM2 captured by the rear camera 85 side by side on a single screen 79a, by making the height of the shooting range of the side camera 80 and the height of the shooting range of the rear camera 85 approximately the same, the images from the side camera 80 and the rear camera 85 displayed on a single screen 79a can be viewed simultaneously without any sense of incongruity.

[0106] The work machine 1 may be equipped with an image processing device that processes images captured by the side camera 80 and images captured by the rear camera 85 so that they are continuous. In this case, the image processed by the image processing device becomes a single continuous image covering the area from the side to the rear of the machine body 2, and this image is displayed on the screen 79a of the display device 79. As a result, the operator who looks at the image displayed on the screen 79a of the display device 79 can quickly and easily grasp the situation around the machine body 2.

[0107] As shown in Figure 3, since the prime mover 20 of the work machine 1 is located on the right side of the machine body 2, the weight 12 located at the rear of the machine body 2 does not become excessively hot due to heat transfer from the prime mover 20. Therefore, it is possible to prevent the heat generated from the prime mover 20 from adversely affecting the rear camera 85 located inside the weight 12.

[0108] The following describes modifications of the embodiments described above.

[0109] Figures 27 to 30 show modified versions of the mounting structure for attaching the front camera 70 to the aircraft body 2. This modified mounting structure includes a camera mounting bracket 100 for attaching the front camera 70 to the aircraft body 2. The mounting angle of the front camera 70 relative to the camera mounting bracket 100 is adjustable in at least one of the vertical and horizontal directions.

[0110] The camera mounting bracket 100 is located inside the camera case 71. The camera mounting bracket 100 has a first plate 101, a second plate 102, a first shaft 103, and a second shaft 104. The first plate 101 and the second plate 102 are fixed to the side plate portion 77a of the mounting member 77. The first plate 101 and the second plate 102 are arranged parallel to each other with a gap between them in the vertical direction. The camera case 71 is attached to the second plate 102 of the mounting member 77 by mounting fixtures (bolts BL5 and nuts NT1).

[0111] In this embodiment, the first shaft 103 and the second shaft 104 are screws. The first shaft 103 and the second shaft 104 are arranged on the same axis with a gap between them in the vertical direction. The first shaft 103 and the second shaft 104 extend in the vertical direction. The upper part of the first shaft 103 passes through the first plate 101. The upper part of the second shaft 104 passes through the second plate 102. The lower part of the first shaft 103 is connected to the upper part of the front camera 70. The upper part of the second shaft 104 is connected to the lower part of the front camera 70.

[0112] The first shaft 103 is rotatable around its vertical axis relative to the first plate 101. The second shaft 104 is rotatable around its vertical axis relative to the second plate 102. Therefore, the front camera 70 is rotatable around its vertical axis relative to the camera mounting bracket 100 together with the first shaft 103 and the second shaft 104. This allows the mounting angle of the front camera 70 relative to the camera mounting bracket 100 to be adjusted horizontally (left and right) (see Figure 30).

[0113] Although not shown in the diagram, the mounting angle of the front camera 70 relative to the camera mounting bracket 100 may be adjustable in the vertical direction. In this case, the first plate 101 and the second plate 102 are arranged parallel to each other with a gap between them in the left-right direction. The first shaft 103 and the second shaft 104 are arranged to extend horizontally. One end of the first shaft 103 passes through the first plate 101, and the other end is connected to the front camera 70. One end of the second shaft 104 passes through the second plate 102, and the other end is connected to the front camera 70.

[0114] The first shaft 103 is rotatable around a horizontal axis relative to the first plate 101. The second shaft 104 is rotatable around a horizontal axis relative to the second plate 102. As a result, the front camera 70 can rotate together with the first shaft 103 and the second shaft 104 around a horizontal axis relative to the camera mounting bracket 100. This allows the mounting angle of the front camera 70 relative to the camera mounting bracket 100 to be adjusted in the vertical direction.

[0115] With a mounting structure equipped with a camera mounting bracket 100 as described above, the camera's shooting range can be appropriately adjusted to a suitable range by adjusting the mounting angle of the camera relative to the camera mounting bracket.

[0116] The work machine 1 may have a prime mover 20 located at the rear of the machine body 2. In this case, the rear bonnet covering the prime mover 20 at the rear of the machine body 2 has an outer wall 37 and an inner wall 38, and the rear camera 85 can be placed between the outer wall 37 and the inner wall 38 of the rear bonnet. In this case, the outer wall 37 of the bonnet (rear bonnet) constitutes the rear surface of the machine body 2. This prevents the heat generated from the prime mover 20 from adversely affecting the rear camera 85 located on the rear bonnet, even when the prime mover 20 is located at the rear of the machine body 2.

[0117] In this case, the rear bonnet on which the rear camera 85 is located can be, for example, at least one of the following: the rear cover 91 located in the center of the aircraft width direction at the rear of the aircraft 2 as shown in Figure 4; the left rear cover 92 located at the left rear of the aircraft 2; and the right rear cover 93 located at the right rear of the aircraft 2.

[0118] As described above, the outer wall 37 of the bonnet, in which the camera is located (between the outer wall and the inner wall), constitutes at least one of the side and rear surfaces of the aircraft body 2.

[0119] In the embodiment described above, the work machine 1 is equipped with a front camera 70, a side camera 80, and a rear camera 85. However, the work machine 1 may be equipped with only one or two of the front camera 70, side camera 80, and rear camera 85. In other words, the work machine 1 only needs to be equipped with at least one of the front camera 70, side camera 80, and rear camera 85.

[0120] A preferred embodiment of the present invention provides a work machine 1 as described in the following items.

[0121] (Item A1) An implement 1 comprising a machine body 2, a prime mover 20 mounted on the machine body 2, a cooler (radiator 23) for cooling the prime mover 20, a cooling fan 22 driven by the prime mover 20, an air conditioning system including a condenser 25, and a duct 45 equipped with an outside air intake section 46 into which outside air is introduced by the drive of the cooling fan 22, wherein the duct 45 has a first air guide section 51 that guides outside air introduced from the outside air intake section 46 to the cooler, and a second air guide section 52 that guides outside air introduced from the outside air intake section 46 to the condenser 25.

[0122] With this work machine 1, the duct 45, which is provided with a first air guide section 51 and a second air guide section 52, allows for the common use of an air guide structure for guiding outside air to cool the cooler (radiator 23) for the prime mover 20 and an air guide structure for guiding outside air to cool the condenser 25 for the air conditioning system. Therefore, the space occupied by the duct can be reduced compared to when both air guide structures are in separate ducts.

[0123] (Item A2) The work machine 1 according to Item A1, further comprising a partition plate 67 that divides the internal space of the duct 45 into the first air guide section 51 and the second air guide section 52.

[0124] According to this work machine 1, by providing a partition plate 67, it is possible to balance the amount of air guided to the cooler (radiator 23) through the first air guide section 51 and the amount of air guided to the condenser 25 through the second air guide section 52. This makes it possible to adjust the heat balance inside the duct 45. Furthermore, it is possible to prevent a decrease in cooling effect due to insufficient air guided by either the first air guide section 51 or the second air guide section 52.

[0125] (Item A3) The work machine 1 described in Item A1 or A2, wherein the condenser 25 is positioned lower than the cooler (radiator 23).

[0126] With this work machine 1, by positioning the condenser 25 lower than the cooler (radiator 23), the space below the cooler can be effectively utilized.

[0127] (Item A4) The work machine 1 according to any one of items A1 to A3, comprising a cabin 8 mounted on the left side of the machine body 2, and the condenser 25 attached to the duct 45 at the front lower right side of the machine body 2.

[0128] With this work machine 1, the condenser 25 is attached to the duct 45 and positioned at the front lower part of the right side of the machine body 2 (opposite the cabin 8), so the space at the front lower part of the right side of the machine body 2 (to the right and in front of the cabin 8) can be effectively utilized.

[0129] (Item A5) The prime mover 20, the cooling fan 22, and the cooler (radiator 23) are arranged in a line from the rear to the front of the machine body 2, and the condenser 25 is located in front of and below the cooler, as described in any of Items A1 to A4.

[0130] With this work machine 1, by positioning the condenser 25 in front of and below the cooler (radiator 23), the space in front of and below the cooler can be effectively utilized. In addition, the condenser 25 and cooler can be compactly arranged close together. This improves the mounting of the condenser 25 and cooler, and increases the design (external shape) freedom of the machine body 2.

[0131] (Item A6) An implement 1 according to any one of items A1 to A5, comprising an electric fan 27 for cooling the condenser 25, wherein the electric fan 27 is located on the outer side of the machine body 2 relative to the condenser 25.

[0132] With this work machine 1, the condenser 25 and the electric fan 27 can be compactly mounted on the machine body 2. Furthermore, by positioning the electric fan 27 on the outside of the machine body 2 relative to the condenser 25, the operator's visibility is improved, and the noise transmitted to the operator can be reduced.

[0133] (Item A7) The work machine 1 according to any one of items A1 to A6, wherein the duct 45 has a first portion 53 which constitutes at least a part of the first air guide portion 51 and a second portion 54 which constitutes at least a part of the second air guide portion 52, and the first portion 53 and the second portion 54 are separable.

[0134] With this work machine 1, the duct 45 can be separated into a first part 53 and a second part 54, making it possible to easily perform maintenance on the cooler.

[0135] (Item A8) The work machine 1 according to Item A7, comprising an openable and closable bonnet (first bonnet 31) covering the upper part of the engine chamber 21 housing the prime mover 20, wherein the first part 53 separates from the second part 54 when the bonnet is opened and moves together with the bonnet.

[0136] With this work machine 1, by opening the bonnet (first bonnet 31), it becomes possible to access the cooler (radiator 23) from the front of the machine body 2, thus making it easy to perform maintenance on the cooler.

[0137] (Item A9) The work machine 1 according to any one of Items A1 to A8, wherein the outside air intake section 46 includes a first outside air intake section 47 that introduces outside air from the top of the machine body 2 and a second outside air intake section 48 that introduces outside air from the side of the machine body 2.

[0138] With this work machine 1, outside air can be introduced into the duct 45 from the top and side of the machine body 2 by the first outside air intake section 47 and the second outside air intake section 48. As a result, outside air can be smoothly taken into the duct 45, and a cooling effect can be reliably obtained from the taken-in outside air.

[0139] (Item A10) The machine body 2 has a discharge section (third opening 43) for discharging outside air that has passed through the condenser 25 to the outside, and the discharge section is located at the front lower part of the machine body 2. The work machine 1 according to any one of items A1 to A9.

[0140] With this work machine 1, outside air that has passed through the condenser 25 can be discharged forward and downward from the discharge section (third opening 43), thus preventing the discharged outside air from hitting workers around the machine body 2.

[0141] (Item A11) The work machine 1 according to Item A10, wherein the condenser 25 is arranged at an angle so as it moves backward as it goes downward, and the discharge section (third opening 43) is at an angle so as it moves backward as it goes downward.

[0142] With this work machine 1, the discharge section (third opening 43) is inclined to move towards the rear as it goes downwards, so the front lower part of the machine body 2 on which the discharge section is provided is less likely to hit obstacles when the work machine 1 is moving.

[0143] (Item B1) The work machine 1 comprises a machine body 2, a bonnet (fifth bonnet 35) that forms the outer surface of the machine body 2, and a first camera (side camera 80) that photographs the area around the machine body 2, wherein the bonnet has an outer wall 37 that forms at least one of the side and rear surfaces of the machine body 2, and an inner wall 38 provided inside the outer wall 37, and the first camera is positioned between the outer wall 37 and the inner wall 38.

[0144] With this work machine 1, since the first camera (side camera 80) is positioned between the outer wall 37 and the inner wall 38 of the bonnet (fifth bonnet 35) which constitutes at least one of the side and rear surfaces of the machine, the camera can be installed at a lower position than when it is installed on the top surface of the bonnet. This reduces the blind spot when imaging the area below and near the machine, and allows for imaging of a wide area around the machine.

[0145] (Item B2) The first camera (side camera 80) is positioned below the vertical center of the bonnet (fifth bonnet 35) as described in Item B1.

[0146] With this work machine 1, by positioning the first camera (side camera 80) at a low position, it is possible to prevent a blind spot in the shooting range below the vicinity of the machine body 2 (near the fifth bonnet 35). Also, compared to when the first camera is positioned at a high position, the downward area can be photographed even when the first camera is installed at a position close to horizontal. Therefore, it is possible to reduce the downward blind spot while also securing the shooting range of the first camera in the horizontal direction. In addition, it is possible to reduce the degree to which the captured image is stretched by image processing, thereby reducing distortion of the captured image. As a result, it becomes easier to grasp the surrounding situation from the image captured by the first camera.

[0147] (Item B3) The work machine 1 according to item B1 or B2, wherein the outer wall 37 has a recess 37a that is recessed toward the inner wall 38, and the first camera (side camera 80) is positioned in the recess 37a.

[0148] With this work machine 1, the first camera (side camera 80) is positioned in the recess 37a, so that the first camera does not protrude outside the machine body 2. This prevents the first camera from colliding with other objects and reduces the likelihood of damage to the first camera.

[0149] (Item B4) The work machine 1 as described in Item B3, wherein the first camera (side camera 80) is positioned outward and downward toward the machine body 2, and the recess 37a widens toward the downward.

[0150] This work device 1 makes it possible to secure a wide shooting range (angle) below the first camera (side camera 80).

[0151] (Item B5) The work machine 1 according to any one of items B1 to B4, wherein the bonnet (fifth bonnet 35) has an openable and closable door 35a, the door 35a has an outer wall 37 and an inner wall 38, and the first camera (side camera 80) is positioned between the outer wall 37 and the inner wall 38 of the door 35a.

[0152] With this work machine 1, it is possible to easily access the first camera (side camera 80) by opening the door 35a, thus making it easier to perform maintenance on the first camera.

[0153] (Item B6) The work machine 1 according to Item B1, comprising a traveling device 3 that supports the machine body 2 so as to be able to move, the bonnet (fifth bonnet 35) forming the side of the machine body 2, and the camera (side camera 80) being positioned to face side and downward of the machine body 2, and capable of including at least a part of the traveling device 3 in its shooting range.

[0154] With this work machine 1, the traveling device 3 can be included in the shooting range of the camera (side camera 80), making it easy for the operator to understand the positional relationship between the captured area and the machine body 2 by looking at the camera's image.

[0155] (Item B7) The work machine 1 according to any one of items B1 to B6, comprising a weight 12 that constitutes the rear of the machine body 2, and a second camera (rear camera 85) disposed inside the weight 12.

[0156] With this work machine 1, the second camera 85, which is located inside the weight 12, can photograph the area behind the machine body 2 (behind the weight 12). Furthermore, because the second camera 85 is located inside the weight 12, the weight 12 can protect the second camera 85.

[0157] (Item B8) The work machine 1 described in Item B7, wherein the second camera 85 is positioned below the vertical center of the weight 12.

[0158] With this work machine 1, by positioning the second camera 85 at a low position (below the vertical center of the weight 12), it is possible to prevent a blind spot in the shooting range from occurring below the vicinity of the machine body 2 (near the weight 12).

[0159] (Item B9) The work machine 1 described in item B7 or B8, wherein the camera (side camera 80) and the second camera 85 are arranged at approximately the same height.

[0160] With this work machine 1, the shooting ranges of the camera (side camera 80) and the second camera 85 can be aligned in the vertical direction, so that the image captured by the camera (side camera 80) and the image captured by the second camera 85 can be viewed simultaneously without any sense of incongruity.

[0161] (Item B10) The work machine 1 according to any one of Items B7 to B9, wherein the weight 12 has a second recess 12h that is recessed toward the inside of the machine body 2, and the second camera 85 is positioned in the second recess 12h.

[0162] With this work machine 1, the second camera 85 is positioned in the second recess 12h, so that the second camera 85 does not protrude outside the machine body 2. This prevents the second camera 85 from colliding with other objects, making it less likely for the second camera 85 to be damaged.

[0163] (Item B11) The work machine 1 as described in Item B10, wherein the second camera 85 is positioned outward and downward toward the body 2, and the second recess 12h widens toward the downward.

[0164] This work device 1 makes it possible to secure a wide shooting range (angle) below the second camera 85.

[0165] (Item B12) The aircraft body 2 is equipped with a prime mover 20, and the bonnet constitutes the outer surface of the prime mover chamber 21 in which the prime mover 20 is located.

[0166] This work device 1 prevents the heat generated from the prime mover 20 from adversely affecting the first camera located on the hood.

[0167] (Item C1) A work machine 1 comprising a machine body 2, a driver's seat 7 mounted on the machine body 2, a work device 4 equipped with a boom 16 that can swing vertically in front of the machine body 2, and a camera (front camera 70) that photographs the front of the machine body 2, wherein the boom 16 is positioned offset to one side in the width direction of the machine body 2 relative to the driver's seat 7, and the camera is positioned at the front lower part of the machine body 2 and on one side in the width direction relative to the boom 16.

[0168] With this work machine 1, the camera (front camera 70) is located at the front lower part of the machine body 2 and on one side in the machine body width direction relative to the boom 16 (the side on which the view from the driver's seat is obstructed by the boom 16). Therefore, during operation, the work situation in a position that is in the blind spot of the driver's seat 7 can be reliably grasped without being obstructed by the movement of the boom 16.

[0169] (Item C2) The work machine 1 as described in Item C1, wherein the machine body 2 has a support member 13 that supports the base end 16a of the boom 16, and the camera (front camera 70) is attached to the support member 13.

[0170] With this work machine 1, the camera (front camera 70) is attached to a support member 13 that supports the base end 16a of the boom 16, so the camera does not move due to the swinging of the boom 16. If the camera is attached to the boom 16 or arm 17, the camera will also move when the boom 16 or arm 17 is moved during work, but this can be prevented by attaching the camera to the support member 13.

[0171] (Item C3) The work machine 1 according to Item C2, wherein the support member 13 includes a support bracket 14 provided on a base plate 11 located below the driver's seat 7, and a swing bracket 15 that is rotatable about an axis extending vertically with respect to the support bracket 14 and supports the base end of the boom 16, and the camera (front camera 70) is attached to the swing bracket 15.

[0172] With this work device 1, the camera (front camera 70) can be moved in conjunction with the rotation of the swing bracket 15 that supports the base end of the boom 16. Therefore, the shooting position relative to the boom 16 can always be kept the same, regardless of the swing position of the boom 16. This ensures that the work area operated by the work device 4 is reliably captured by the camera.

[0173] (Item C4) The camera (front camera 70) is located to the side of the swing bracket 15, and is the work machine 1 described in Item C3.

[0174] With this work machine 1, since the camera (front camera 70) is positioned to the side of the swing bracket 15, the camera can take pictures without being affected by the vertical swing of the boom 16.

[0175] (Item C5) The work machine 1 according to any one of items C1 to C4, comprising a cabin 8 that protects the driver's seat 7, wherein the camera (front camera 70) is positioned on one side in the width direction relative to the cabin 8.

[0176] With this work machine 1, the operator seated in the driver's seat 7 can check the condition of one side of the machine in the width direction relative to the cabin 8, which is a part that is difficult for the operator to see, by using images captured by a camera (front camera 70).

[0177] (Item C6) The work machine 1 according to any one of items C1 to C5, wherein the machine body 2 is rotatable about an axis in the vertical direction, and the camera (front camera 70) is rotatable together with the machine body 2 about an axis in the vertical direction.

[0178] With this work machine 1, the camera (front camera 70) can rotate together with the machine body 2 around its vertical axis, so the camera's shooting range can be moved as the machine body 2 rotates. Therefore, the work area operated by the work device 4 can be reliably photographed by the camera.

[0179] (Item C7) A work machine 1 according to any one of items C1 to C6, comprising a camera mounting bracket 100 for attaching the camera (front camera 70) to the machine body 2, wherein the camera's mounting angle relative to the camera mounting bracket 100 can be adjusted in at least one of the vertical and horizontal directions.

[0180] With this work machine 1, the shooting range of the camera can be appropriately adjusted to an appropriate range by adjusting the mounting angle of the camera (front camera 70) relative to the camera mounting bracket 100.

[0181] While embodiments of the present invention have been described above, the embodiments disclosed herein should be considered in all respects to be illustrative and not restrictive. The scope of the present invention is indicated by the claims rather than the foregoing description, and all modifications within the meaning and scope of equivalents of the claims are intended to be included.

[0182] 1. Work machine 2. Machine body 4. Work device 7. Driver's seat 8. Cabin 13. Support member 14. Support bracket 15. Swing bracket 16. Boom 16a. Base end 70. Camera (front camera) 100. Camera mounting bracket

Claims

1. A work device comprising: a machine body; a driver's seat mounted on the machine body; a work device equipped with a boom that can swing vertically in front of the machine body; and a front camera for photographing the front of the machine body, wherein the boom is positioned offset to one side in the width direction of the machine body relative to the driver's seat, and the front camera is positioned at the front lower part of the machine body, on one side in the width direction relative to the boom.

2. The work machine according to claim 1, wherein the machine body has a support member that supports the base end of the boom, and the front camera is attached to the support member.

3. The work machine according to claim 2, wherein the support member includes a support bracket provided on a base plate located below the driver's seat, and a swing bracket that is rotatable about an axis extending vertically with respect to the support bracket and supports the base end of the boom, and the front camera is attached to the swing bracket.

4. The work machine according to claim 3, wherein the front camera is positioned to the side of the swing bracket.

5. The work machine according to claim 1, comprising a cabin that protects the driver's seat, wherein the front camera is positioned on one side in the width direction relative to the cabin.

6. The work machine according to claim 1, wherein the machine body is rotatable about an axis in the vertical direction, and the front camera is rotatable together with the machine body about an axis in the vertical direction.

7. The work machine according to claim 1, comprising a camera mounting bracket for attaching the front camera to the machine body, wherein the mounting angle of the front camera relative to the camera mounting bracket is adjustable in at least one of the vertical and horizontal directions.

Images