Working machinery

Abstract

To provide a work machine that suppresses the adhesion of obstructions or dirt to the imaging device and ensures a clear field of view. [Solution] A hydraulic excavator 50 has an upper rotating body 2 that is rotatably mounted relative to a lower traveling body 1, the upper rotating body 2 comprising a building cover 100 that covers a machine room 101, a cooling fan 10 that generates cooling air W, and a heat exchanger 9 that is cooled by the cooling air W generated by the cooling fan 10, wherein the upper rotating body 50 has recesses 200L, 200R provided on the side surface of the building cover 100 with the opening facing outward, cameras 13, 18 provided on the upper wall portions 202L, 202R of the recesses 200L, 200R that image the area around the building cover 100, and slits 61, 66 provided on the lower wall portions 201L, 201R of the recesses 200L, 200R that allow cooling air W to pass between the outside and inside of the machine room 101.

Description

Technical Field

[0001] The present invention relates to a working machine having a machine room in an upper revolving body.

Background Art

[0002] Patent Document 1 discloses a working machine that installs a plurality of cameras in a working machine, performs signal processing based on camera images acquired by these cameras, converts the viewpoint so as to be an overhead view point, and displays it on a monitor as an overhead image. The plurality of cameras include a rear camera that captures the rear view of the working machine and two side cameras that capture the side views on both the left and right sides. An image synthesizing means is provided for displaying a synthesized overhead image obtained by synthesizing the individual overhead images captured by each camera on the monitor. On the monitor, a display character obtained by graphically representing a plan view of the working machine is displayed. The synthesized overhead image synthesized by the image synthesizing means is a monitoring panoramic image having a rear overhead image based on a camera image from the rear camera at a rear position of the display character and left and right side overhead images based on camera images from the left and right side cameras at both left and right side positions, respectively. Further, a front camera having the front of the working machine as a field of view is provided, and this front camera is not synthesized by the image synthesizing means but is displayed on the monitor as a camera image, and a switching means for enlarging and displaying at least one of the camera images before the viewpoint conversion of the individual overhead images constituting the synthesized overhead image is superimposed on the synthesized overhead image displayed on the monitor.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in general, construction machinery such as hydraulic excavators are used outdoors. Therefore, in structures where cameras are installed on top of buildings, tanks, counterweights, etc., as in the conventional technology described above, there is a risk that the camera's field of view may be obstructed by fallen leaves or dirt caused by dust, etc.

[0005] The present invention has been made in view of the above circumstances, and its purpose is to provide a work machine that can suppress the adhesion of obstructions or dirt to the imaging device and ensure the field of view of the imaging device. [Means for solving the problem]

[0006] To achieve the above objective, the present invention provides a work machine comprising: a self-propelled lower traveling body; an upper rotating body rotatably mounted relative to the lower traveling body; and a front working device rotatably mounted relative to the upper rotating body, wherein the upper rotating body comprises: a machine room; a building cover covering the machine room; a prime mover located in the machine room; a cooling fan located in the machine room that generates cooling air; a heat exchanger located in the machine room that is cooled by the cooling air generated by the cooling fan; and a hydraulic pump located in the machine room that is driven by the prime mover, the work machine having a substantially V-shaped or substantially U-shaped cross-section and provided on the side surface of the building cover such that the opening faces outward; at least one imaging device provided on the upper wall of the recess that images the area around the building cover; and a vent provided on the lower wall of the recess that allows the cooling air to pass between the outside of the machine room and the inside of the machine room. [Effects of the Invention]

[0007] According to the present invention, it is possible to suppress the adhesion of obstructions or dirt to the imaging device and ensure the field of view of the imaging device. [Brief explanation of the drawing]

[0008] [Figure 1] This is a side view showing the overall appearance of a hydraulic excavator in one embodiment of the present invention. [Figure 2]This is a schematic diagram showing the detailed layout of equipment inside the machine room. [Figure 3] This is a perspective view showing a detailed overview of the left side of the building cover. [Figure 4] This is a perspective view showing a detailed overview of the right side of the building cover. [Figure 5] Figure 3 is an enlarged view of the main part, and Figure 4 is an enlarged view of the main part. [Figure 6] This is a perspective view from the front of the bracket, showing the detailed structure of the camera unit. [Figure 7] This is a perspective view from the back of the bracket, showing the detailed structure of the camera unit. [Figure 8] These are schematic cross-sectional views of the left recess and its surrounding structure, and the right recess and its surrounding structure. [Modes for carrying out the invention]

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

[0010] <Overview of Hydraulic Excavators> Figure 1 shows a hydraulic excavator 50, which is an example of a work machine of this embodiment. In the following description, the up-down direction, front-back direction, and left-right direction correspond to the arrow directions shown as appropriate in Figure 1 and other figures. That is, "up," "down," "front," "rear," "left," and "right" in the figures correspond to the up, down, left, right, front, and rear directions as seen from the perspective of an operator seated in the driver's cab 58 (described later).

[0011] The hydraulic excavator 50 has a body consisting of a self-propelled crawler-type lower vehicle 1 and an upper slewing vehicle 2 that is rotatably mounted on the lower vehicle 1, and a work device 51 (front work device) that is tilted and tilted attached to the upper slewing vehicle 2.

[0012] The working device 51 is configured as a multi-joint type, comprising a boom 4 that is capable of being raised and lowered, an arm 5 that is rotatably connected to the boom 4, and a bucket 6 that is rotatably connected to the arm 5. The boom 4, arm 5, and bucket 6 are operated by hydraulic actuators, namely a hydraulic cylinder 4A for the boom, a hydraulic cylinder 5A for the arm, and a hydraulic cylinder 6A for the bucket, respectively.

[0013] The upper rotating body 2 comprises a rotating frame 7, a counterweight 60, a driver's cab 58, and a building cover 100 that covers the machine room 101, which will be described later. The rotating frame 7 is the base of the upper rotating body 2 and is a support structure that extends in the front, rear, left, and right directions of the vehicle body by joining multiple steel plates and steel materials. The work device 51 is mounted on the front of the vehicle body of the rotating frame 7 so as to be able to move up and down. The counterweight 60 is installed at the rear of the vehicle body of the rotating frame 7 and acts as a weight to balance the weight with the work device 51. The driver's cab 58 is mounted on the front left side of the rotating frame 7.

[0014] <Machine room> Inside the building cover 100, there is a machine room 101 located at the rear of the vehicle body. A schematic diagram showing the detailed equipment layout inside the machine room 101 is shown in Figure 2.

[0015] In Figure 2, the machine room 101 contains an engine 8 (prime mover) mounted horizontally with its crankshaft oriented left-right, a hydraulic pump 82 driven by the engine 8, a heat exchanger 9, and in this example, a cooling fan 10 which is a suction-type fan, all mounted on a slewing frame 7. In addition, an exhaust gas purification device 15 (aftertreatment device) for purifying the exhaust gas discharged as the engine 8 operates is provided at the bottom of the machine room 101.

[0016] The heat exchanger 9 includes a plurality of appropriate heat exchangers, such as an oil cooler, a radiator, an intercooler, etc. The oil cooler cools the hydraulic oil used for driving the working device 51. The radiator cools the cooling water of the engine 8. The intercooler cools the intake air supplied to the engine 8 by a turbocharger (not shown). The cooling fan 10 rotates by the driving force of an electric motor (or the driving force of the engine 8) not shown, and generates cooling air (including the flows W1 to W6 described later. Hereinafter, simply referred to as "cooling air W" as appropriate) for cooling the heat exchanger 9.

[0017] The engine 8 is provided between the cooling fan 10 and the right side surface 100R of the building cover 100. In the machine room 101, a partition wall 190 is provided that partitions the space on the right side (in other words, on the side of the right side surface 100R) of the cooling fan 10 including the engine 8 in the machine room 101 into an upper side space WU and a lower side space WL.

[0018] <Details of the building cover> The building cover 100 has a left side surface 100L and the above-described right side surface 100R. The left side surface 100L includes a left door 11 (first opening / closing door) that opens and closes the machine room 101 from the left side to expose the inside from the outside, and a left cover 12 (first cover) located above the left door 11. The right side surface 100R includes a right door 16 (second opening / closing door) that opens and closes the machine room 101 from the right side to expose the inside from the outside, and a right cover 17 (second cover) located above the right door 16.

[0019] <Problems in the camera and its arrangement> In the hydraulic excavator 50 having the above-described configuration, in this embodiment, cameras 13 and 18 (details will be described later) capable of imaging the periphery of the upper swing body 2 are provided in order to ensure work safety and improve workability. At this time, since a working machine such as the hydraulic excavator 50 is usually used outdoors, depending on the location where the cameras 13 and 18 are provided, there is a risk that the field of view of the cameras cannot be secured due to a shielding object such as fallen leaves or dirt due to dust or the like.

[0020] <Main part of the embodiment> In response to the above, the main feature of this embodiment is that the cameras 13 and 18 are positioned in the part of the building cover 100 that corresponds to the flow path of the cooling air W generated by the aforementioned cooling fan 10. The details will be explained below in order.

[0021] <Recess> Figure 3 is a perspective view showing a detailed overview of the left side 100L of the building cover 100, and Figure 4 is a perspective view showing a detailed overview of the right side 100R of the building cover 100. An enlarged view of the main part of Figure 3 is shown in Figure 5(a), and an enlarged view of the main part of Figure 4 is shown in Figure 5(b). As shown in Figures 3, 4, 5(a), and 5(b), in the hydraulic excavator 50 of this embodiment, a left recess 200L (see Figure 3) and a right recess 200R (see Figure 4) are formed on the left side 100L and right side 100R of the building cover 100, respectively, with the opening side facing outward. In this example, the recesses 200L and 200R have a roughly V-shaped (or roughly U-shaped) cross-sectional shape.

[0022] As shown in Figures 3 and 5(a), the left recess 200L is formed on the left side surface 100L, below the left cover 12 and above the left door 11. In this example, the left side surface 100L is the first side surface, which is one of the left and right sides, and the left recess 200L corresponds to the first recess. That is, in this example, the upper part of the left door 11 constitutes the lower wall portion 201L of the left recess 200L, and the lower part of the left cover 12 constitutes the upper wall portion 202L of the left recess 200L. In the left recess 200L, the position of the left end portion 201La of the lower wall portion 201L is located further to the left than the position of the left end portion 202La of the upper wall portion 202L (see also Figure 8(a) below).

[0023] As shown in Figures 4 and 5(b), the right recess 200R is formed on the right side surface 100R, below the right cover 17 and above the right door 16. In this example, the right side surface 100R is the second side surface, which is the other side of the left and right sides, and the right recess 200R corresponds to the second recess. That is, in this example, the upper part of the right door 16 constitutes the lower wall portion 201R of the right recess 200R, and the lower part of the right cover 17 constitutes the upper wall portion 202R of the right recess 200R. In the right recess 200R, the position of the right end portion 201Ra of the lower wall portion 201R is located further to the right than the position of the right end portion 202Ra of the upper wall portion 202R (see also Figure 8(b) below).

[0024] <Left and Right Slits> As shown in Figures 3 and 5(a), a left slit 61 (first intake port, vent) is provided at the top of the left door 11, which forms the lower wall portion 201L of the left recess 200L mentioned above, to draw cooling air W from outside the machine room 101 into the machine room 101. The left slit 61 is composed of small slit groups 61U and 61D, which are collections of strip-shaped small slits 61a and 61b with their axes approximately in the vertical direction. In other words, by arranging two stages, an upper small slit group 61U and a lower small slit group 61D, efforts are made to draw in as much outside air as possible. In particular, in this example, the vertical dimension of the small slits 61a that make up the lower small slit group 61D is shorter than that of the small slits 61b that make up the upper small slit group 61U.

[0025] Furthermore, as shown in Figures 4 and 5(b), a right slit 66 (first exhaust port, vent) is provided at the top of the right door 16, which forms the lower wall portion 201R of the right recess 200R described above, to exhaust the cooling air W from inside the machine room 101 to outside the machine room 101. The right slit 66 is composed of a group of small slits 66U, which is an assembly of strip-shaped small slits 66a with their axes approximately in the vertical direction. That is, unlike the left slit 61, the lower group of small slits is omitted, and only the upper group of small slits 66U is provided, so that as much upward flow W4 of the cooling air W (see also Figure 8(b) described later) as possible is generated. As a result, the overall opening area of ​​the left slit 61 is larger than the overall opening area of ​​the right slit 66.

[0026] <Camera placement> In the hydraulic excavator 50 of this embodiment, at least one camera is provided to image the area around the building cover 100. In this example, a left camera 13 (first imaging device) is provided to image the area around the left side of the building cover 100, i.e., the left side 100L, and a right camera 18 (second imaging device) is provided to image the area around the right side of the building cover 100, i.e., the right side 100R.

[0027] <Left camera> As shown in Figures 3 and 5(a), the left camera 13 is attached to the lower slope of the left cover 12 near the rear end, which is the upper wall portion 202L of the left recess 200L, via a substantially flat bracket 14. Specifically, as shown in Figures 6 and 7, the bracket 14 has a substantially rectangular opening 14A in the center. A storage box 71 for housing and supporting the left camera 13 is provided on the back surface of the bracket 14. The left camera 13 is fixed to the storage box 71 with the connecting cable 72 connected, so that the lens 13a of the left camera 13 faces into the opening 14A, and is positioned relative to the bracket 14.

[0028] As a result, as shown in the figure, the bracket 14, storage box 71, left camera 13, and connecting cable 72 are integrated into a single unit, forming the left camera unit 80. This left camera unit 80 is detachably attached to the left cover 12 from the surface side by bolts 81, with the position of the opening 14A of the bracket 14 aligned with the position of a rectangular opening (not shown) provided at the mounting position of the upper wall portion 202L (i.e., the lower slope of the left cover 12).

[0029] In the left camera unit 80, the tip of the lens 13a of the left camera 13 protrudes beyond the surface of the bracket 14. As a result, when the left camera unit 80 is mounted on the upper wall portion 202L, the tip of the lens 13a protrudes beyond the surface of the left cover 12. Also, as shown in Figure 6, there is a gap r between the outer shape of the lens 13a and the opening 14A of the bracket 14, and this gap can function as an auxiliary vent (intake or exhaust port) for the cooling air W. When mounting the left camera unit 80, as shown in Figure 8(a), a schematic cross-sectional view of the left recess 200L and its surrounding structure, the left camera 13 is positioned to the left of the upper end position 61x of the left slit 61 (more specifically, the upper slit group 61U).

[0030] <Right camera> As shown in Figures 4 and 5(b), the right camera 18 is mounted to the lower slope near the front end of the right cover 17, which is the upper wall portion 202R of the right recess 200R, via a substantially flat bracket 19. The right camera 18, like the left camera 13 described above, is integrated with the bracket 19, support box (not shown), and connecting cable (not shown) into a right camera unit 90 (see Figures 4 and 5(b)). The mounting structure of the right camera 18 to the bracket 19 and the mounting structure to the upper wall portion 202R via bolts 91 (see Figures 4 and 5(b)) in the right camera unit 90 are the same as those of the left camera unit 80, and therefore will not be described. When mounting the right camera unit 90, as shown in Figure 8(b), a schematic cross-sectional view of the right recess 200R and its surrounding structure, the right camera 18 is positioned to the right (in other words, outside) of the upper end 66x of the right slit 66.

[0031] <Left and right opening windows> On the other hand, as shown in Figures 3 and 5(a), in this embodiment, a left opening window 62 (second air intake), different from the left slit 61, is provided in the left cover 12 above the left camera unit 80 equipped with the left camera 13, for drawing cooling air W from outside the machine room 101 into the machine room 101. The left opening window 62 is composed of a collection of approximately parallelogram-shaped small windows 62a whose axes are obliquely inclined in a rearward upward shape.

[0032] As shown in Figures 4 and 5(b), a right opening window 67 (second exhaust port), different from the right slit 66, is provided on the right cover 17 above the right camera unit 90 equipped with the right camera 18, for exhausting cooling air W from inside the machine room 101 to outside the machine room 101. The right opening window 67, like the left opening window 62 described above, is composed of a collection of parallelogram-shaped small windows 67a whose axes are obliquely inclined in a rearward upward shape. The small windows 67a are larger than the small windows 62a of the left opening window 62 shown in Figure 3, and are arranged in fewer numbers in the right opening window 67 than the number of small windows 62a in the left opening window 62. As a result, the overall opening area of ​​the right opening window 67 shown in Figures 4 and 5(b) is larger than the overall opening area of ​​the left opening window 62 shown in Figures 3 and 5(a).

[0033] <Effects of the Embodiment> In the hydraulic excavator 50 of this embodiment, configured as described above, when the operator starts the engine 8, a cooling fan 10 is driven by a controller (not shown) to prevent the vehicle from overheating. When the cooling fan 10 is driven, outside air is drawn into the machine room 101 through the left slit 61 of the left door 11 and the left opening window 62 of the left cover 12, generating cooling air W. The cooling air W drawn into the machine room 101 cools the heat exchanger 9, engine 8, hydraulic pump 82, exhaust gas purification device 15, etc., and is then discharged through the right slit 66 of the right door 16 and the right opening window 67 of the right cover 17.

[0034] At this time, the side surface of the building cover 100 that covers the machine room 101 is provided with recesses 200L and 200R having a roughly V-shaped (or roughly U-shaped) cross-section. A left slit 61 and a right slit 66 are provided in the lower wall portions 201L and 201R of the recesses 200L and 200R, respectively, while a left camera 13 and a right camera 18 are provided in the upper wall portions 202L and 202R, respectively.

[0035] As a result, as shown in Figure 8(a) above, the left slit 61 functions as a vent that allows cooling air W to pass between the outside and inside of the machine room 101, specifically as an intake for drawing cooling air W into the machine room 101. Of the cooling air W entering the left recess 200L on the side of the building cover 100, the flow W1 directed approximately horizontally toward the lower wall 201L is introduced directly into the machine room 101 through the left slit 61. On the other hand, of the cooling air W entering the left recess 200L, the flow W2 directed approximately horizontally toward the upper wall 202L collides with the upper wall 202L, changes direction downwards, and is introduced into the machine room 101 through the left slit 61 in the lower wall 201L. The left camera 13, which is installed on the upper wall 202L, is strongly exposed to the flow W2 when the air changes direction at the upper wall 202L as described above.

[0036] Furthermore, as shown in Figure 8(b) above, the right slit 66 functions as a vent that allows the cooling air W to pass between the outside and inside of the machine room 101, specifically as an exhaust port for exhausting the cooling air W to the outside of the machine room 101. The flow W3 of the cooling air W that cools the various pieces of equipment above the partition wall 190 inside the machine room 101 and heads toward the right slit 66 is discharged out of the machine room 101 almost horizontally from the right slit 66. On the other hand, the flow W4 of the cooling air W that cools the hydraulic pump 82 located in the lower part of the machine room 101 and heads toward the right slit 66 collides with the upper wall portion 202R of the right recess 200R, changes direction almost horizontally toward the outside of the machine room 101, and is then discharged out of the machine room 101. The right camera 18, which is installed on the upper wall portion 202R, is strongly exposed to the flow of cooling air W4 when the camera changes direction on the upper wall portion 202R as described above.

[0037] As a result of the above, according to this embodiment, since the cameras 13 and 18 are constantly exposed to the flow of cooling air W2 and W4 while the engine is running, obstructions such as fallen leaves or dirt such as dust are less likely to adhere to the cameras 13 and 18, and even if they do adhere, they can be blown away and removed by the flow of cooling air W2 and W4. Therefore, a good field of view for the cameras 13 and 18 can be ensured.

[0038] Furthermore, in this embodiment, as shown in Figures 3 and 8(a), the position of the left end (in other words, the upper end; the same applies hereinafter) 201La of the lower wall portion 201L of the left recess 200L is located further to the left (in other words, outside) than the position of the left end (in other words, the lower end; the same applies hereinafter) 202La of the upper wall portion 202L. In other words, the lower wall portion 201L protrudes to the left of the upper wall portion 202L. As a result, the flow W2 of the cooling air W, which changes direction downward in the upper wall portion 202L and flows into the machine room 101, collides with a wide area of ​​the upper wall portion 202L, making it more likely for the flow W2 to hit the left camera 13 installed on the upper wall portion 202L.

[0039] Furthermore, in this embodiment, as shown in Figure 3, a left opening window 62, different from the left slit 61, is provided above the left recess 200L on the left side surface 100L of the building cover 100, to draw cooling air W from outside the machine room 101 into the machine room 101. As a result, a flow W5 (see Figure 3) of cooling air W is generated that flows into the machine room 101 from the left opening window 62 above the left recess 200L, separate from the flow W2 that collides with the upper wall portion 202L of the left recess 200L, changes direction, and flows into the machine room 101 from the left slit 61. This improves the cooling performance of the cooling fan 10 for each piece of equipment inside the machine room 101.

[0040] Furthermore, in this embodiment in particular, as shown in Figures 4 and 8(b), the position of the right end (in other words, the upper end; the same applies hereinafter) 201Ra of the lower wall portion 201R of the right recess 200R is located further to the right (in other words, outward) than the position of the right end (in other words, the lower end; the same applies hereinafter) 202Ra of the upper wall portion 202R. This makes it possible to create a structure that makes it easier for the flow W2 of the cooling air W to hit the left camera 13 of the upper wall portion 202L of the left recess 200L, which is the intake side of the cooling air W (a structure in which the position of the left end portion 201La of the lower wall portion 201L of the left recess 200L is located further to the left than the left end portion 202La of the upper wall portion 202L; see Figure 8(a)), and to achieve a symmetrical structure.

[0041] Furthermore, in this embodiment, as shown in Figure 8(b), the position of the right camera 18 on the upper wall portion 202R of the right recess 200R is located further to the right (in other words, outward) than the upper end 66x of the right slit 66 of the lower wall portion 201R. In other words, the position of the right camera 18 protrudes to the right of the upper end 66x of the right slit 66. As a result, at least a portion of the cooling air W flow W4, which, as described above, collides with the upper wall portion 202R of the right recess 200R from below inside the machine room 101, changes direction, and flows out to the outside of the machine room 101, is more likely to reliably hit the right camera 18.

[0042] Furthermore, in this embodiment, as shown in Figure 4, a right opening window 67, different from the right slit 66, is provided above the right recess 200R on the right side surface 100R of the building cover 100, for exhausting the cooling air W from inside the machine room 101 to outside the machine room 101. This allows the flow of cooling air W W6 (see Figure 4) that has passed through the upper space WU above the aforementioned partition wall 190 inside the machine room 101 to be exhausted almost horizontally from the upper right opening window 67.

[0043] <Regarding the problems to be solved and the effects of the invention> The problems that this invention aims to solve and the effects of this invention are not limited to those described above. In other words, this invention may solve problems not mentioned above, produce effects not mentioned above, solve only some of the problems described, or produce only some of the effects described.

[0044] <Regarding shape, numerical values, and structure> With regard to the components illustrated in the embodiments and drawings, their shapes, numerical values, or the interrelationships of the structures of multiple components can be arbitrarily modified and improved within the scope of the technical concept of the present invention.

[0045] Furthermore, although not to be exemplified individually, the present invention may be implemented with various modifications without departing from its spirit. [Explanation of Symbols]

[0046] 1. Lower running body 2. Upper rotating body 8. Engine (prime mover) 9 Heat exchanger 10 Cooling Fans 11. Left door (first opening / closing door) 12 Left cover (first cover) 13. Left camera (first imaging device, imaging device) 16 Right door (second opening / closing door) 17 Right cover (second cover) 18. Right camera (second imaging device, imaging device) 50 Hydraulic Excavator (Work Machine) 51 Working device (front working device) 61 Left slit (first air intake, vent) 62 Left opening window (second air intake) 66 Right slit (first exhaust port, vent) 66x Upper edge of the right slit 67 Right-hand opening window (second exhaust vent) 82 Hydraulic pump 100 Building Cover 100L Left side (one side, first side) 100R Right side (the other side, second side) 101 Machine room 200L Left recess (1st recess) 200R Right recess (2nd recess) 201L Lower wall part 201R Lower wall part 201La Left end (upper end) 201R Lower wall part 201Ra Right edge (upper edge) 202L Upper wall section 202R Upper wall part 202La Left end (bottom end) 202R Upper wall part 202Ra Right side end (bottom end) W Cooling Air W1-4 Cooling airflow

Claims

1. A self-propelled lower vehicle, An upper slewing body is provided so as to be rotatable relative to the lower traveling body, A front work device is provided that can be tilted upward and downward relative to the upper rotating body, It has, The upper rotating body is, The machine room and, A building cover that covers the aforementioned machine room, The prime mover located in the aforementioned machine room, A cooling fan is placed in the aforementioned machine room and generates cooling air, A heat exchanger is located in the aforementioned machine room and is cooled by the cooling air generated by the cooling fan, A hydraulic pump located in the machine room and driven by the prime mover, In a work machine equipped with, A recess is provided on the side of the building cover, having a roughly V-shaped or U-shaped cross-section, with the opening facing outward, An imaging device provided on the upper wall of the recess and for imaging the area around the building cover, A vent is provided in the lower wall of the recess, allowing the cooling air to circulate between the outside of the machine room and the inside of the machine room, A work machine characterized by having the following features.

2. In the work machine described in claim 1, Multiple recesses are provided, The plurality of recesses include a first recess provided on a first side which is one of the left and right sides of the building cover. The aforementioned vent is, The lower wall portion of the first recess includes a first air intake port for drawing cooling air from outside the machine room into the machine room, Multiple imaging devices are provided, The plurality of imaging devices, The first imaging device is provided on the upper wall portion of the first recess and includes a first imaging device that images the area around the first side of the building cover. A work machine characterized by the following features.

3. In the work machine described in claim 2, In the first recess, the upper end position of the lower wall portion is located further outward than the lower end position of the upper wall portion. A work machine characterized by the following features.

4. In the work machine described in claim 2, On the first side surface, as the ventilation opening, The structure has a second intake port, different from the first intake port, located above the first recess, which draws the cooling air from outside the machine room into the machine room. A work machine characterized by the following features.

5. In the work machine described in claim 1, Multiple recesses are provided, The plurality of recesses include a second recess provided on the second side, which is the other side of the left and right sides of the building cover. The aforementioned vent is, The second recess is provided in the lower wall portion and includes a first exhaust port for exhausting the cooling air from the machine room to the outside of the machine room, Multiple imaging devices are provided, The plurality of imaging devices, The second recess includes a second imaging device provided on the upper wall portion of the second recess, which images the area around the second side of the building cover. A work machine characterized by the following features.

6. In the work machine described in claim 5, In the second recess, the upper end position of the lower wall portion is located further outward than the lower end position of the upper wall portion. A work machine characterized by the following features.

7. In the work machine described in claim 6, The second imaging device provided on the upper wall is located further outward than the upper end position of the first exhaust port provided on the lower wall. A work machine characterized by the following features.

8. In the work machine described in claim 7, The aforementioned prime mover is It is provided between the cooling fan and the second side surface, The aforementioned machine room is The machine room has a partition wall that separates the space on the second side side from the cooling fan, which includes the prime mover, between the upper space and the lower space. The second side is, The structure has a second exhaust port, different from the first exhaust port, located above the second recess, which exhausts the cooling air from the machine room to the outside of the machine room. A work machine characterized by the following features.

9. In the work machine described in claim 1, The building cover has a first side which is one of the left and right sides, and a second side which is the other of the left and right sides. The first aspect is, A first opening / closing door that allows the interior of the machine room to be exposed from the outside, A first cover located above the first opening / closing door, It has, The second aspect is, A second opening / closing door that allows the interior of the machine room to be exposed from the outside, A second cover located above the second opening / closing door, It has, Multiple recesses are provided, The plurality of recesses are, A first recess formed on the lower side of the first cover and on the upper side of the first opening / closing door, A second recess formed on the lower side of the second cover and on the upper side of the second opening / closing door, Includes, In the first recess, the upper end position of the lower wall portion is located further outward than the lower end position of the upper wall portion. In the second recess, the upper end position of the lower wall portion is located further outward than the lower end position of the upper wall portion. The aforementioned prime mover is It is provided between the cooling fan and the second side surface, The aforementioned machine room is The machine room has a partition wall that separates the space on the second side side from the cooling fan, which includes the prime mover, between the upper space and the lower space. The aforementioned vent is, A first air intake port is provided on the upper part of the first opening / closing door, which is the lower wall portion of the first recess, and draws the cooling air from outside the machine room into the machine room, It includes a first exhaust port provided on the upper part of the second opening / closing door which forms the lower wall of the second recess, for exhausting the cooling air from the machine room to the outside of the machine room, Multiple imaging devices are provided, The plurality of imaging devices, A first imaging device is provided at the lower part of the first cover, which forms the upper wall portion of the first recess, and which images the area around the first side of the building cover. The system includes a second imaging device provided at the lower part of the second cover, which forms the upper wall portion of the second recess, for imaging the area around the second side of the building cover, The second imaging device is located outside the upper end position of the first exhaust port, The first cover is, A portion above the first imaging device is a second intake port, different from the first intake port, which draws the cooling air from outside the machine room into the machine room. The second cover is, Located above the second imaging device, there is a second exhaust port, different from the first exhaust port, which exhausts the cooling air from the machine room to the outside of the machine room. The opening area of ​​the first intake port is larger than that of the first exhaust port. The opening area of ​​the second intake port is smaller than that of the second exhaust port. A work machine characterized by the following features.

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