JP6797144B2 - Construction machinery - Google Patents

Description

The present invention relates to construction machinery such as hydraulic excavators used at work sites such as civil engineering, forestry, demolition, and underground construction.

For example, in construction machines such as hydraulic excavators, a camera is installed on the outside of the exterior surface on the rear side of the construction machine for the purpose of obtaining visibility behind the driver's seat and diagonally behind when performing excavation work or demolition work. In many cases. On the other hand, at the work site, there is a concern that the camera may be damaged due to the arrival of earth and sand or rubble, the camera may be disassembled illegally, or the camera may be stolen.

Here, Patent Document 1 describes a construction machine in which a camera is attached to the inside of an exterior cover (engine cover). According to the technique described in Patent Document 1, by mounting the camera inside the outer cover, it is possible to obtain both effects of preventing damage and preventing theft.

Japanese Unexamined Patent Publication No. 2013-204288

In the case of the technique described in Patent Document 1, a heat insulating cover is provided around the camera for the purpose of protecting the camera body from heat generation of the engine. This heat insulating cover is attached to the exterior cover together with the camera. For this reason, in addition to increasing the number of parts, for example, it is necessary to remove the heat insulating cover when performing the work of adjusting the angle of the camera, which may make the adjustment work troublesome.

An object of the present invention is to provide a construction machine capable of protecting a camera from the heat of an engine and suppressing troublesome adjustment work of the camera.

The construction machine of the present invention comprises a self-propelled lower traveling body, an upper rotating body rotatably mounted on the lower traveling body, and a work device swayably attached to the upper rotating body. The upper swivel body includes a swivel frame to which the work device is attached on the front end side, a counter weight provided on the rear end side of the swivel frame in order to balance the weight of the work device, and the counter weight. In a construction machine having an engine located on the front side and mounted on the swivel frame, an engine cover for opening and closing the engine, and a camera attached to the engine cover to view the rear of the upper swivel body. The counterweight is provided so as to penetrate between a front surface facing the engine and a rear surface opposite to the front surface, and has an opening that can be opened and closed by the engine cover. When the engine cover covers the opening, the engine cover is located in the opening, and the counterweight is inserted into the counterweight when the engine cover is closed, and between the engine and the camera. A camera covering portion that covers the camera is provided at a distance.

According to the present invention, the camera can be protected from the heat of the engine, and the adjustment work of the camera can be suppressed from becoming troublesome. That is, the camera attached to the engine cover enters the camera cover portion provided on the counterweight with the engine cover closed. Therefore, the camera is protected from the heat of the engine by the camera cover when the engine cover is closed. Moreover, when the engine cover is opened, the camera attached to the engine cover moves together with the engine cover, and the camera goes out from the inside of the camera cover (the camera is exposed from the camera cover). Therefore, the angle of the camera can be easily adjusted when the engine cover is opened.

It is a left side view which shows the hydraulic excavator by the 1st Embodiment. It is a rear view which looked at the hydraulic excavator from the right side of FIG. It is a perspective view which shows the engine cover, the counterweight, the camera, etc. in the closed door state. It is a perspective view which shows the engine cover, the counterweight, the camera, etc. in the opened door state. It is a perspective view which shows the counter weight, the camera cover part and the like. It is an exploded perspective view which shows an engine cover, a camera and the like. It is a rear view which shows by enlarging part (VII) in FIG. 2 and omitting an engine cover. It is sectional drawing seen from the direction of arrow VIII-VIII in FIG. It is a perspective view which shows the counter weight, the camera covering part and the like by the 2nd Embodiment. It is an exploded perspective view which shows the engine cover, the camera and the like by the 2nd Embodiment. It is a rear view of the position similar to FIG. 7 according to the second embodiment. It is sectional drawing seen from the direction of arrow XII-XII in FIG.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings, taking as an example a case where the embodiment of the present invention is applied to a hydraulic excavator as a typical example of a construction machine.

1 to 8 show the first embodiment. In FIG. 1, the hydraulic excavator 1 as a construction machine is widely used at work sites such as civil engineering, forestry, demolition, and underground construction. The hydraulic excavator 1 of the embodiment is a small-sized hydraulic excavator (for example, a machine weight of about 1 to 8 tons, more specifically, about 6 tons) suitable for work in a narrow work site such as a street. It is configured as a (mini excavator). Further, the hydraulic excavator 1 of the embodiment is configured as a cab specification hydraulic excavator.

The hydraulic excavator 1 includes a self-propelled crawler type lower traveling body 2, an upper swivel body 4 mounted on the lower traveling body 2 so as to be swivelable via a swivel device 3, and an upper swivel body 4 in the front-rear direction. It is configured to include a work device 5 oscillatingly attached to the front side. In this case, the lower traveling body 2 and the upper turning body 4 constitute the vehicle body of the hydraulic excavator 1.

The lower traveling body 2 is, for example, a track belt 2A in which a plurality of shoes are attached to a track link formed in an endless shape, and a left and right traveling hydraulic pressure for traveling a hydraulic excavator 1 by orbiting the track belt 2A. It is configured to include a motor (not shown). The swivel device 3 is provided between the lower traveling body 2 and the upper swivel body 4 (swivel frame 6 described later), and has a swivel bearing 3A that rotatably supports the upper swivel body 4 and a swivel center of the swivel bearing 3A. A swivel hydraulic motor (not shown) that swivels and drives the upper swivel body 4 is included.

The working device 5, also called the front device, is provided on the front side of the upper swing body 4. The work device 5 is configured as, for example, a swing post type work device. The working device 5 includes a swing post 5A, a boom 5B, an arm 5C, and a bucket 5D as a working tool. In addition to this, the work device 5 includes a swing cylinder (not shown) that swings the swing post 5A (and the entire work device 5) to the left and right, a boom cylinder 5E that rotates the boom 5B, and an arm 5C. It includes a rotating arm cylinder 5F and a bucket cylinder 5G as a work tool cylinder that rotates the bucket 5D.

The upper swivel body 4 includes a swivel frame 6, a cab 7, a counterweight 8, an engine 9, an exterior cover 10, an engine cover 11, and a camera 13. The swivel frame 6 serves as a support structure (base frame) for the upper swivel body 4, and a work device 5 is attached to the front end side. Further, on the swivel frame 6, a cab 7 is mounted on the left front side, and a counterweight 8 is mounted on the rear end side. Further, on the swivel frame 6, various devices such as an engine 9, a hydraulic pump (not shown), a heat exchanger (not shown), and a control valve device (not shown) are located on the front side of the counterweight 8. Is installed. These various devices are covered with an exterior cover 10 that forms an outer shell of the upper swing body 4.

A driver's seat 7A in which the operator is seated is provided in the cab 7. A traveling lever / pedal operating device and a working lever operating device (neither of which are shown) for operating the hydraulic excavator 1 are provided around the driver's seat 7A. By operating the traveling lever / pedal operating device and the working lever operating device, the operator can perform traveling operation by the lower traveling body 2, turning operation of the upper turning body 4, excavation work by the working device 5, and the like. ..

Further, in the cab 7, a display device (not shown) such as a monitor is provided located near (for example, in front of) the driver's seat 7A. For example, an image (image) taken by a camera 13 described later is displayed on this display device. As a result, the operator can monitor (confirm) the rear of the counterweight 8 by the image displayed on the display device while operating the hydraulic excavator 1 in the cab 7.

The counter weight 8 is provided on the rear end side of the swivel frame 6. The counterweight 8 is formed as a heavy object for balancing the weight with the working device 5. As shown in FIG. 5, the counterweight 8 is composed of a quadrangular (square frame-shaped) block body as a whole, and is integrally formed by, for example, a casting means. The rear surface 8A of the counterweight 8 has an arcuate convex curved surface so that the central portion in the left-right direction projects rearward. The curvature of the rear surface 8A of the counterweight 8 is set as, for example, the radius of curvature centered on the turning center of the upper swinging body 4 or the vicinity of the turning center. The counterweight 8 rises upward from the rear end of the swivel frame 6 and covers various devices such as the engine 9, the hydraulic pump, and the heat exchanger from the rear side.

Here, the counterweight 8 has an inspection port 8B that serves as an opening. The inspection port 8B is opened in a square shape and is provided at the center of the counterweight 8 in the left-right direction. In this case, the inspection port 8B is provided so as to penetrate between the rear surface 8A and the front surface 8C of the counterweight 8, that is, between the front surface 8C facing the engine 9 and the rear surface 8A on the opposite side of the front surface 8C. There is. The inspection port 8B is covered with the engine cover 11 so as to be openable and closable. As shown in FIG. 4, the operator opens the engine cover 11 so that the inspection port 8B is open, so that the operator can perform maintenance and inspection work on the mounted equipment such as the engine 9 and the hydraulic pump through the inspection port 8B. Can be done.

Left and right link mounting seats 8D and 8E project from the inner peripheral edge on the upper side of the inspection port 8B so as to face each other in the left and right directions. The left and right link mounting seats 8D and 8E have an oval shape extending upward and downward along the inner peripheral edge of the inspection port 8B, and are integrally formed with the counterweight 8. Link mechanisms 12 and 12 (vehicle body side mounting plates 12A), which will be described later, are mounted on the left and right link mounting seats 8D and 8E, respectively. Further, an additional weight mounting hole 8F for mounting an additional weight (not shown) to the counterweight 8 is provided on the rear surface 8A of the counterweight 8 below the inspection port 8B.

Further, as shown in FIG. 5, the counterweight 8 is provided with a camera covering portion 8G located in the inspection port 8B. The camera cover portion 8G covers the camera 13 attached to the engine cover 11 as a whole. That is, the camera 13 attached to the engine cover 11 enters the camera covering portion 8G when the engine cover 11 covers the inspection port 8B and the door is closed. As a result, the camera covering portion 8G covers the camera 13 with a gap between the engine 9 and the camera 13. The camera covering portion 8G is formed by a pair of vertical walls 8G1 and 8G2 extending upward and downward from the counterweight 8 (inner surface of the inspection port 8B), and the engine 9 and the camera 13 between the vertical walls 8G1 and 8G2. It is equipped with a horizontal wall 8G3 that separates them. In this case, the vertical walls 8G1 and 8G2 are separated from each other in the left and right directions and extend in parallel with each other in the upward and downward directions.

In the first embodiment, the camera covering portion 8G is provided on the upper opening edge of the inspection port 8B. That is, the camera covering portion 8G protrudes downward from the opening edge to the upper side of the opening edge on the inner peripheral surface of the inspection port 8B, more specifically, the opening edge on the rear surface 8A side. It is provided in. In this case, the camera covering portion 8G is provided integrally with the counterweight 8. In other words, the camera covering portion 8G is integrally molded into (the main body of) the counterweight 8 by casting means in the inspection port 8B of the counterweight 8.

The vertical walls 8G1 and 8G2 of the camera covering portion 8G extend in parallel from the inner peripheral surface of the inspection port 8B toward the lower side. Further, the horizontal wall 8G3 is located between the vertical walls 8G1 and 8G2 and extends downward from the inner peripheral surface of the inspection port 8B and extends diagonally downward from the middle toward the rear side. As a result, the camera covering portion 8G is opened toward the rear side of the hydraulic excavator 1. That is, the camera covering portion 8G includes the rear end edge of the left vertical wall 8G1, the rear end edge of the right vertical wall 8G2, the rear end edge (lower end edge) of the horizontal wall 8G3, and the left and right vertical walls 8G1,. It is opened in a square shape by the peripheral edge of the inspection port 8B between 8G2. The camera 13 attached to the engine cover 11 moves in and out of the camera cover portion 8G as the engine cover 11 opens and closes.

The engine 9 is located on the front side of the counterweight 8 and is provided on the rear side of the swivel frame 6 (see FIG. 1). The engine 9 is mounted on the turning frame 6 in a horizontal position extending in the left-right direction. The engine 9 is composed of an internal combustion engine such as a diesel engine. A hydraulic pump is attached to the output side of the engine 9. By driving a hydraulic pump, the engine 9 uses the hydraulic oil stored in the hydraulic oil tank (not shown) as pressure oil to hydraulic actuators (left and right traveling hydraulic motors, turning hydraulic motors, swing cylinders, etc. Boom cylinder 5E, arm cylinder 5F, bucket cylinder 5G). The drive source (power source) for driving the hydraulic pump may be composed of an engine 9 alone as an internal combustion engine, or may be composed of, for example, an engine and an electric motor.

The exterior cover 10 is provided on the rear side of the swivel frame 6 continuously with the counterweight 8. The exterior cover 10 is arranged on the rear left side of the swivel frame 6 and smoothly continuous from the left end side of the counterweight 8 toward the front, and the left rear cover 10A and the rear right side of the swivel frame 6 are arranged on the right end side of the counterweight 8. A right rear cover 10B that is smoothly continuous from the front to the front, and a top cover 10C that is arranged between the left rear cover 10A and the right rear cover 10B and is smoothly continuous from the upper end side of the counterweight 8 to the front. Is configured to include. The exterior cover 10 covers on-board equipment such as an engine 9, a hydraulic pump, a heat exchanger, and a control valve device mounted on the swivel frame 6 together with a counter weight 8 and an engine cover 11.

The engine cover 11 covers the engine 9 so as to be openable and closable. The engine cover 11 can be moved between a closed state in which the inspection port 8B of the counterweight 8 is covered as shown in FIG. 3 and an open state in which the inspection port 8B of the counterweight 8 is opened as shown in FIG. it can. For this purpose, the engine cover 11 is attached to the inspection port 8B of the counterweight 8 via the link mechanisms 12 and 12, which will be described later. Further, at the upper end side of the engine cover 11, more specifically, at the position where the engine cover 11 faces the camera covering portion 8G in the closed state covering the inspection port 8B, a quadrangular through hole for the camera is provided. 11A is provided.

The camera 13 is attached to the back surface (the surface facing the engine 9), which is the inner surface of the engine cover 11, at a position corresponding to the camera opening 11A. The camera 13 is arranged obliquely downward so as to face the camera opening 11A. Although not shown, the engine cover 11 is provided with a lock mechanism for locking the engine cover 11 at the closed position shown in FIG. Further, the engine cover 11 may be provided with a handle or the like that the operator grasps when opening and closing the engine cover 11, if necessary.

The link mechanisms 12 and 12 move the engine cover 11 upward and downward with respect to the counterweight 8. As shown in FIG. 6, the link mechanisms 12 and 12 are arranged between the counterweight 8 and the engine cover 11 in pairs in the left and right directions. The link mechanisms 12 and 12 include a vehicle body side mounting plate 12A, a cover side mounting plate 12B, a first link member 12C, a second link member 12D, and a spring 12E, respectively. The vehicle body side mounting plate 12A is mounted on the link mounting seats 8D and 8E of the inspection port 8B of the counterweight 8. The cover-side mounting plate 12B is mounted on the inner side surface (back surface) of the engine cover 11.

Each of the link mechanisms 12 and 12 constitutes a parallel link by the first link member 12C and the second link member 12D. Therefore, the engine cover 11 can move upward in parallel with the rear surface 8A of the counterweight 8 from the closed position shown in FIG. 3 to the open position shown in FIG. At this time, the spring 12E can reduce the force required for the operator to lift the engine cover 11 by urging the engine cover 11 toward the open position against the weight of the engine cover 11. it can.

The camera 13 is attached to the engine cover 11. The camera 13 projects the rear side of the upper swivel body 4, and is composed of, for example, a wired or wireless CCD camera (digital camera). The camera 13 captures a range behind the counterweight 8 which is a blind spot for the operator in the cab 7. The image captured by the camera 13 is transmitted to the display device in the cab 7. In the drawings, the wiring of the camera 13 is omitted.

The camera 13 is mounted inside the engine cover 11 at a position corresponding to the camera opening 11A. As a result, the camera 13 is located in the inspection port 8B in a closed state in which the engine cover 11 covers the inspection port 8B. As shown in FIG. 6, the camera 13 is attached to the inner side surface (back surface) of the engine cover 11 via the cover side bracket 14 and the camera side bracket 15. That is, the cover side bracket 14 is fixedly provided on the inside of the engine cover 11 at the upper side of the camera opening 11A. The cover-side bracket 14 is formed in a U-shape as a whole by bending a plate material such as a steel plate or the like.

The cover-side bracket 14 is composed of a pair of leg portions 14A fixed to the inside of the engine cover 11 by using, for example, an adhesive means, a welding means, or the like, and a connecting portion 14B connecting the front end edges of the pair of leg portions 14A. Has been done. Each leg 14A is provided with a bolt insertion hole 14C through which a bolt 16 for attaching the camera-side bracket 15 to the cover-side bracket 14 is inserted. Further, a welding nut 14D screwed with the bolt 16 is fixedly provided on the inner surface (the surface on the camera opening 11A side) of each leg portion 14A at a portion corresponding to the bolt insertion hole 14C.

A camera-side bracket 15 is attached to the cover-side bracket 14 so that the attachment angle can be adjusted upward and downward. The camera-side bracket 15 is formed in a U-shape as a whole by bending a plate material such as a steel plate, for example, and connects the pair of legs 15A and the front end edges of the pair of legs 15A. It is composed of and. Each leg 15A is provided with a bolt insertion hole 15C through which the bolt 16 is inserted. The connecting portion 15B is provided with a mounting notch 15D for mounting the camera 13 on the camera-side bracket 15. The camera 13 is attached to the connecting portion 15B of the camera-side bracket 15 using bolts (not shown).

The camera-side bracket 15 is attached to the leg portion 14A of the cover-side bracket 14 by bolts 16 so that the angle can be adjusted, and the camera 13 is fixed to the connecting portion 15B of the camera-side bracket 15 by bolts (not shown). As a result, the camera 13 is attached to the engine cover 11 via the camera-side bracket 15 and the cover-side bracket 14 so that the angle can be adjusted.

The angle of the camera 13 can be adjusted by rotating (swinging) the camera-side bracket 15 with respect to the cover-side bracket 14 in the vertical direction around the bolt 16. Then, the camera 13 is made to face the camera opening 11A of the engine cover 11, adjusted so that the field of view of the camera 13 includes the necessary range behind the upper swing body 4, and the bolt 16 is fastened to the engine. The camera 13 can be fixed to the cover 11 at a desired angle.

The hydraulic excavator 1 according to the embodiment has the above-described configuration, and the operation thereof will be described next.

When the operator on the cab 7 starts the engine 9, the engine 9 drives the hydraulic pump. The pressure oil discharged from the hydraulic pump is used for the traveling lever / pedal operating device provided in the cab 7, the lever operation of the working lever operating device, and the traveling hydraulic motor, the turning hydraulic motor, and the boom according to the pedal operation. Discharge toward the cylinder 5E, arm cylinder 5F, bucket cylinder 5G, and the like. As a result, the hydraulic excavator 1 can perform a traveling operation by the lower traveling body 2, a turning operation of the upper rotating body 4, an excavation operation by the working device 5, and the like.

At this time, the camera 13 mounted near the upper end inside the engine cover 11 photographs the rear of the counterweight 8 which is a blind spot for the operator in the cab 7, and the image captured by the camera 13 is inside the cab 7. It is displayed on the display device arranged in. As a result, the operator who operates the hydraulic excavator 1 in the cab 7 can confirm (monitor) the rear of the counterweight 8 by the image displayed on the display device, and the surroundings when performing a turning operation, an excavation operation, or the like. Visibility can be improved.

During the operation of the hydraulic excavator 1, the inspection port 8B of the counterweight 8 is covered with the engine cover 11. At this time, as shown in FIG. 8, the camera 13 enters the camera covering portion 8G provided in the inspection port 8B of the counterweight 8. Therefore, the camera covering portion 8G can protect the camera 13 from the heat of the engine 9. That is, the camera cover portion 8G can insulate the camera 13 from the engine 9.

On the other hand, when adjusting the angle of the camera 13, the lock mechanism of the engine cover 11 is unlocked to open the engine cover 11 with the inspection port 8B open. As a result, the camera 13 moves out of the camera covering portion 8G. In this state, the angle of the camera 13 can be adjusted by loosening the bolt 16 that fixes the camera-side bracket 15 and the cover-side bracket 14 and swinging the camera-side bracket 15 around the bolt 16.

As described above, according to the first embodiment, the camera 13 enters the counterweight 8 when the engine cover 11 is closed, and covers the camera 13 with a gap between the engine 9 and the camera 13. A camera covering portion 8G is provided. Therefore, the camera 13 attached to the engine cover 11 enters the camera cover portion 8G provided on the counterweight 8 with the engine cover 11 closed. As a result, the camera 13 is protected from the heat of the engine 9 by the camera cover portion 8G when the engine cover 11 is in the closed state.

Moreover, when the engine cover 11 is opened, the camera 13 attached to the engine cover 11 moves together with the engine cover 11, and the camera 13 moves out of the camera cover portion 8G. That is, the camera 13 is exposed from the camera covering portion 8G. Therefore, the angle of the camera 13 can be easily adjusted by opening the engine cover 11. Therefore, in the first embodiment, the camera covering portion 8G can protect the camera 13 from the heat of the engine 9, and can suppress the troublesome adjustment work of the camera 13.

According to the first embodiment, the camera covering portion 8G includes a pair of vertical walls 8G1, 8G2 and horizontal walls 8G3 provided between these vertical walls 8G1, 8G2. Therefore, the camera 13 can be totally covered by the camera covering portion 8G provided with the pair of vertical walls 8G1 and 8G2 and the horizontal walls 8G3. As a result, the camera 13 can be stably insulated from the engine 9.

According to the first embodiment, the camera covering portion 8G is provided on the upper opening edge of the inspection port 8B, which is the opening of the counterweight 8. Therefore, the camera 13 can be arranged on the upper side of the engine cover 11 in the vertical direction. As a result, the camera 13 can be arranged at a high position on the rear side of the upper swing body 4.

Next, FIGS. 9 to 12 show a second embodiment. The feature of the second embodiment is that the camera covering portion is provided on the lower opening edge of the opening of the counterweight. In the second embodiment, the same components as those in the first embodiment described above are designated by the same reference numerals, and the description thereof will be omitted.

In the second embodiment as well, the camera covering portion 21 is provided in the inspection port 8B of the counterweight 8 as in the first embodiment. In the second embodiment, the camera covering portion 21 is provided on the lower opening edge of the inspection port 8B. That is, the camera covering portion 21 projects upward from the opening edge to the lower side of the opening edge on the inner peripheral surface of the inspection port 8B, more specifically, the opening edge on the rear surface 8A side. It is provided in.

The camera covering portion 21 is formed between a pair of vertical walls 21A and 21B extending upward and downward from the counterweight 8 (the inner surface of the inspection port 8B), and the engine 9 and the camera 13 between the vertical walls 21A and 21B. It has a side wall 21C that separates them. In this case, the vertical walls 21A and 21B extend in parallel from the inner peripheral surface of the inspection port 8B toward the upper side. The horizontal wall 21C is located between the vertical walls 21A and 21B and extends upward from the inner peripheral surface of the inspection port 8B, and extends diagonally upward from the middle toward the rear side.

On the other hand, at the lower end side of the engine cover 11, more specifically, at the position where the engine cover 11 faces the camera covering portion 21 in the closed state where the engine cover 11 covers the inspection port 8B, a camera opening having a rectangular through hole is formed. 22 is provided. That is, as the camera cover portion 21 is provided on the lower side in the inspection port 8B, the camera opening 22 is also provided on the lower end side of the engine cover 11. The camera 13 is attached to the back surface (the surface facing the engine 9), which is the inner surface of the engine cover 11, at a position corresponding to the camera opening 22.

The second embodiment covers the camera 13 attached to the lower end side of the engine cover 11 by the camera covering portion 21 as described above, and the basic operation thereof is according to the first embodiment described above. There is no particular difference from the one. That is, in the second embodiment as in the first embodiment, the camera covering portion 21 can protect the camera 13 from the heat of the engine 9, and the adjustment work of the camera 13 becomes troublesome. Can be suppressed.

In particular, in the second embodiment, the camera covering portion 21 is provided on the lower opening edge of the inspection port 8B, which is the opening of the counterweight 8. Therefore, the camera 13 can be arranged below the engine cover 11 in the vertical direction. As a result, the camera 13 can be arranged at a low position on the rear side of the upper swing body 4.

In the first embodiment, the case where the engine cover 11 is opened and closed in the vertical direction has been described as an example. However, the present invention is not limited to this, and for example, the engine cover may be opened and closed to the left or right. This also applies to the second embodiment.

In the first embodiment, a case where the camera covering portion 8G is formed into a square cylinder as a whole by a pair of vertical walls 8G1, 8G2 and horizontal walls 8G3 has been described as an example. However, the present invention is not limited to this, and the camera covering portion may be formed in a semi-cylindrical shape as a whole, for example. This also applies to the second embodiment.

In the first embodiment, a case where the camera covering portion 8G is integrally molded with the counterweight 8 (main body) by a casting means has been described as an example. However, the present invention is not limited to this, and the camera covering portion may be formed separately from, for example, the main body of the counterweight, and the camera covering portion of the separate body may be fixed (fixed) to (the opening) of the counterweight. Good. This also applies to the second embodiment.

In the first embodiment, a hydraulic excavator 1 provided with a swing-type working device 5 that can swing (swing) in the left and right directions has been described as an example. However, the present invention is not limited to this, and for example, a hydraulic excavator equipped with a monoboom type working device, a hydraulic excavator equipped with an offset type working device, and the like, a hydraulic excavator equipped with another type of working device (front device). Can be applied. This also applies to the second embodiment.

In the first embodiment, the small hydraulic excavator 1 has been described as an example, but it may be applied to, for example, a medium-sized or larger hydraulic excavator. Further, although the work tool of the work device 5 has been described by taking the hydraulic excavator 1 of the bucket 5D as an example, it is widely applied to various construction machines such as a dismantling machine (hydraulic excavator for dismantling) using the work tool as a crusher. be able to.

1 Hydraulic excavator (construction machinery)
2 Lower traveling body 4 Upper swivel body 5 Working device 6 Swivel frame 8 Counterweight 8A Rear surface 8B Inspection port (opening)
8C front 8G, 21 camera cover 8G1,8G1,21A, 21B vertical wall 8G3,21C horizontal wall 9 engine 11 engine cover 13 camera

Claims (4)

It is composed of a self-propellable lower traveling body, an upper rotating body rotatably mounted on the lower traveling body, and a work device swayably attached to the upper rotating body.
The upper swivel body includes a swivel frame to which the work device is attached on the front end side, a counter weight provided on the rear end side of the swivel frame in order to balance the weight of the work device, and a front side of the counter weight. In a construction machine having an engine mounted on the swivel frame, an engine cover for opening and closing the engine, and a camera attached to the engine cover to view the rear of the upper swivel body.
The counterweight is provided so as to penetrate between the front surface facing the engine and the rear surface on the opposite side of the front surface, and has an opening that can be opened and closed by the engine cover.
The camera is located in the opening in the closed state where the engine cover covers the opening.
The counterweight is a construction machine characterized in that the camera enters the counterweight when the engine cover is closed, and a camera covering portion for covering the camera is provided with a gap between the engine and the camera. .. In the construction machine according to claim 1,
The camera covering portion includes a pair of vertical walls extending upward and downward from the counterweight, and a horizontal wall that separates the engine and the camera between the pair of vertical walls. machine. In the construction machine according to claim 1,
The opening of the counterweight is opened in a square shape.
A construction machine characterized in that the camera covering portion is provided on an opening edge on the upper side of the opening. In the construction machine according to claim 1,
The opening of the counterweight is opened in a square shape.
A construction machine characterized in that the camera covering portion is provided on an opening edge below the opening.

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