JP2019163600A - Construction machine - Google Patents

Abstract

To provide a construction machine capable of protecting a camera from heat produced by an engine and preventing adjustment procedures of the camera from becoming troublesome.SOLUTION: A counterweight 8 is arranged on a rear end side of a revolving frame 6 and has an access port 8B. The access port 8B is arranged by passing between a front surface 8C facing to an engine 9 and a rear surface 8A at an opposite side of the front surface 8C. The access port 8B is openably/closably covered by an engine cover 11. A camera 13 is attached on the engine cover 11 to capture a rear side of an upper revolving body 4. A camera covering part 8G covering the camera 13 is arranged in the counterweight 8 to separate the camera 13 apart from the engine 9, which the camera 13 enters when the engine cover 11 is in a closed door situation.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a construction machine such as a hydraulic excavator used at a work site such as civil engineering, forestry, demolition, and underground construction.

  For example, a construction machine such as a hydraulic excavator installs a camera outside the exterior surface of the rear side of the construction machine for the purpose of obtaining a view behind the driver's seat and obliquely behind when performing excavation work or dismantling work. There are many cases to do. On the other hand, at the work site, there is a concern of damage to the camera due to the arrival of earth and sand or rubble, unauthorized disassembly of the camera, theft, etc., so a damage prevention cover and a theft prevention mounting structure are required.

  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, it is possible to obtain both effects of preventing damage and preventing theft by attaching the camera to the inside of the exterior cover.

JP 2013-204288 A

  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 the heat generated by the engine. The heat insulating cover is attached to the exterior cover together with the camera. For this reason, in addition to the increase in the number of parts, for example, it is necessary to remove the heat insulating cover when performing the operation of adjusting the angle of the camera, and the adjustment operation may be troublesome.

  The objective of this invention is providing the construction machine which can protect a camera from the heat of an engine, and can suppress that the adjustment operation | work of a camera becomes troublesome.

  The construction machine of the present invention comprises a self-propelled lower traveling body, an upper revolving body that is pivotably mounted on the lower traveling body, and a work device that is swingably attached to the upper revolving body. The upper swing body includes a swing frame having the work device attached to a front end side, a counterweight provided on the rear end side of the swing frame to balance the weight of the work device, and the counterweight In a construction machine comprising an engine mounted on the revolving frame located on the front side, an engine cover that covers the engine so that it can be opened and closed, and a camera that is attached to the engine cover and reflects the rear of the upper revolving structure, 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 can be opened and closed by the engine cover. The camera is positioned in the opening when the engine cover covers the opening, and the counterweight has the opening when the engine cover is closed. A camera cover portion is provided that covers the camera while the camera enters and separates the engine and the camera.

  ADVANTAGE OF THE INVENTION According to this invention, a camera can be protected from the heat of an engine and it can suppress that the adjustment work of a camera becomes troublesome. That is, the camera attached to the engine cover enters the camera cover provided on the counterweight with the engine cover closed. For this reason, the camera is protected from the heat of the engine by the camera cover when the engine cover is in the closed state. 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 of the camera cover (the camera is exposed from the camera cover). For this reason, the angle of the camera can be easily adjusted when the engine cover is opened.

It is a left view which shows the hydraulic excavator by 1st Embodiment. It is the rear view which looked at the hydraulic excavator from the right side of FIG. It is a perspective view which shows the engine cover, counterweight, camera, etc. of a closed door state. It is a perspective view which shows the engine cover, counterweight, camera, etc. of a door open state. It is a perspective view which shows a counterweight, a camera cover part, etc. It is a disassembled perspective view which shows an engine cover, a camera, etc. FIG. 3 is a rear view showing an enlarged (VII) portion in FIG. 2 while omitting an engine cover. It is sectional drawing seen from the arrow VIII-VIII direction in FIG. It is a perspective view which shows the counterweight by 2nd Embodiment, a camera cover part, etc. It is a disassembled perspective view which shows the engine cover, camera, etc. by 2nd Embodiment. It is a rear view of the same position as FIG. 7 by 2nd Embodiment. It is sectional drawing seen from the arrow XII-XII direction 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 present invention is applied to a hydraulic excavator as a typical example of a construction machine.

  1 to 8 show a first embodiment. In FIG. 1, a 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 according to the embodiment is a small-sized hydraulic excavator suitable for work in a narrow work site such as a street (for example, the machine weight is about 1 to 8 tons, more specifically about 6 tons). (Mini excavator). The hydraulic excavator 1 according to the embodiment is configured as a cab specification hydraulic excavator.

  The hydraulic excavator 1 includes a crawler-type lower traveling body 2 that can be self-propelled, an upper revolving body 4 that is turnably mounted on the lower traveling body 2 via a revolving device 3, and a front-rear direction of the upper revolving body 4. And a working device 5 attached to the front side in a swingable manner. In this case, the lower traveling body 2 and the upper swing body 4 constitute a vehicle body of the hydraulic excavator 1.

  The lower traveling body 2 includes, for example, a crawler belt 2A in which a plurality of shoes are attached to an endless track link, and left and right traveling hydraulic pressures that cause the excavator 1 to travel by driving the crawler belt 2A around. And a motor (not shown). The slewing device 3 is provided between the lower traveling body 2 and the upper slewing body 4 (a slewing frame 6 to be described later), a slewing bearing 3A that rotatably supports the upper slewing body 4, and a center of slewing bearing 3A. And a turning hydraulic motor (not shown) for driving the upper turning body 4 to turn.

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

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

  In the cab 7, a driver's seat 7A on which an operator is seated is provided. Around the driver's seat 7A, a traveling lever / pedal operating device for operating the excavator 1 and a working lever operating device (both not shown) are provided. The operator can perform a traveling operation by the lower traveling body 2, a turning operation by the upper revolving body 4, an excavation operation by the working device 5, etc. by operating the traveling lever / pedal operating device and the working lever operating device. .

  In the cab 7, a display device (not shown) such as a monitor is provided in the vicinity (for example, the front) of the driver's seat 7A. On this display device, for example, a video (image) taken by a camera 13 described later is displayed. Thereby, the operator can monitor (confirm) the back of the counterweight 8 by the image displayed on the display device while operating the excavator 1 in the cab 7.

  The counterweight 8 is provided on the rear end side of the turning frame 6. The counterweight 8 is formed as a heavy object for balancing the weight with the work device 5. As shown in FIG. 5, the counterweight 8 is composed of a block body having a quadrangular shape (square frame shape) as a whole, and is integrally formed by, for example, casting means. The rear surface 8A of the counterweight 8 is an arc-shaped convex curved surface so that the central portion in the left-right direction protrudes rearward. The curvature of the rear surface 8A of the counterweight 8 is set, for example, as a radius of curvature centered on the turning center of the upper turning body 4 or the vicinity of the turning center. The counterweight 8 rises upward from the rear end portion of the swing 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 serving as an opening. The inspection port 8 </ b> B is opened in a square shape, and is provided in the center portion of the counterweight 8 in the left-right direction. In this case, the inspection port 8B is provided 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 opposite to the front surface 8C. Yes. The inspection port 8B is covered with an engine cover 11 so as to be opened and closed. As shown in FIG. 4, the operator performs maintenance and inspection work on the equipment such as the engine 9 and the hydraulic pump through the inspection port 8B by setting the engine cover 11 in an open state where the inspection port 8B is opened. 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 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) described later are mounted on the left and right link mounting seats 8D and 8E, respectively. An additional weight attachment hole 8F for attaching 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 cover portion 8G located in the inspection port 8B. The camera cover 8G covers the camera 13 attached to the engine cover 11 as a whole. That is, when the engine cover 11 is closed with the engine cover 11 covering the inspection port 8B, the camera 13 attached to the engine cover 11 enters the camera cover 8G. Thereby, the camera cover 8G covers the camera 13 with the engine 9 and the camera 13 being separated. The camera cover 8G includes a pair of vertical walls 8G1 and 8G2 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 8G1 and 8G2. And a lateral wall 8G3 that separates them. In this case, the vertical walls 8G1, 8G2 are spaced apart in the left and right directions and extend in parallel in the upper and lower directions.

  In the first embodiment, the camera cover 8G is provided at the opening edge on the upper side of the inspection port 8B. That is, the camera cover 8G protrudes from the opening edge on the opening side of the inner peripheral surface of the inspection port 8B, more specifically, to the upper side of the opening edge on the rear surface 8A side, from the opening edge toward the lower side. Is provided. In this case, the camera cover 8G is provided integrally with the counterweight 8. In other words, the camera cover 8G is integrally formed in the counterweight 8 (the main body) by the casting means in the inspection port 8B of the counterweight 8.

  The vertical walls 8G1 and 8G2 of the camera cover 8G extend in parallel from the inner peripheral surface of the inspection port 8B toward the lower side. The horizontal wall 8G3 is positioned between the vertical walls 8G1 and 8G2 and extends downward from the inner peripheral surface of the inspection port 8B, and extends obliquely downward from the middle toward the rear side. Thereby, the camera cover 8G is opened toward the rear side of the excavator 1. That is, the camera cover 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, the left and right vertical walls 8G1, A rectangular opening is formed by the peripheral edge of the inspection port 8B between 8G2. The camera 13 attached to the engine cover 11 enters and exits the camera cover portion 8G as the engine cover 11 is opened and closed.

  The engine 9 is provided on the rear side of the revolving frame 6 and is located on the front side of the counterweight 8 (see FIG. 1). The engine 9 is mounted on the revolving frame 6 in a horizontally placed state extending in the left-right direction. The engine 9 is constituted by 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 hydraulic oil stored in a hydraulic oil tank (not shown) as pressure oil to generate hydraulic actuators (left and right traveling hydraulic motors, swing hydraulic motors, swing cylinders, (Boom cylinder 5E, arm cylinder 5F, bucket cylinder 5G). In addition, the drive source (power source) for driving the hydraulic pump can be configured by the engine 9 alone as an internal combustion engine, or may be configured by an engine and an electric motor, for example.

  The exterior cover 10 is provided on the rear side of the revolving frame 6 continuously to the counterweight 8. The exterior cover 10 is disposed on the left side of the rear portion of the revolving frame 6 and smoothly continues to the front from the left end side of the counterweight 8. The outer cover 10 is disposed on the right side of the rear portion of the revolving frame 6 and the right end side of the counterweight 8. A right rear cover 10B that is smoothly continuous from the front to the front, and an upper surface cover 10C that is disposed between the left rear cover 10A and the right rear cover 10B and that is smoothly continuous forward from the upper end side of the counterweight 8. It is comprised including. The exterior cover 10 covers mounted devices such as the engine 9, the hydraulic pump, the heat exchanger, and the control valve device mounted on the revolving frame 6 together with the counterweight 8 and the engine cover 11.

  The engine cover 11 covers the engine 9 so that it can be opened and closed. The engine cover 11 can be moved between a closed state where the inspection port 8B of the counterweight 8 is covered as shown in FIG. 3 and an open state where 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 link mechanisms 12 and 12 described later. In addition, the upper end side of the engine cover 11, more specifically, a camera opening that is a rectangular through-hole at a position facing the camera cover 8G in a closed state where the engine cover 11 covers the inspection port 8B. 11A is provided.

  A camera 13 is attached at a position corresponding to the camera opening 11 </ b> A on the back surface (the surface facing the engine 9) that is the inner surface of the engine cover 11. The camera 13 is disposed obliquely downward so as to face the camera opening 11A. Although not shown, the engine cover 11 is provided with a lock mechanism that locks the engine cover 11 in the closed position shown in FIG. In addition, the engine cover 11 may be provided with a handle or the like that is gripped by an operator when the engine cover 11 is opened and closed as necessary.

  The link mechanisms 12 and 12 move the engine cover 11 upward and downward relative 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. Each of the link mechanisms 12 and 12 includes 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. 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 attachment plate 12B is attached to the inner side surface (back surface) of the engine cover 11.

  Each link mechanism 12, 12 comprises a parallel link by the first link member 12C and the second link member 12D. For this reason, the engine cover 11 can move substantially parallel upward while facing 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 dead weight of the engine cover 11. it can.

  The camera 13 is attached to the engine cover 11. The camera 13 reflects the back of the upper revolving unit 4 and is configured by, for example, a wired or wireless CCD camera (digital camera). The camera 13 captures an area behind the counterweight 8 that is a blind spot for the operator in the cab 7. The video imaged by the camera 13 is transmitted to the display device in the cab 7. In the drawing, the wiring of the camera 13 is omitted.

  The camera 13 is attached to a position corresponding to the camera opening 11 </ b> A inside the engine cover 11. Thereby, the camera 13 is located in the inspection port 8B in a closed state where 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 inside the engine cover 11 so as to be positioned above 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.

  The cover-side bracket 14 includes a pair of leg portions 14A that are fixed to the inside of the engine cover 11 by using, for example, an adhesive means, a welding means, and the like, and a connecting portion 14B that connects the front end edges of the pair of leg portions 14A. Has been. Each leg portion 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 that is screwed to the bolt 16 is fixedly provided at a portion corresponding to the bolt insertion hole 14C on the inner side surface (the surface on the camera opening 11A side) of each leg portion 14A.

  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 a pair of leg portions 15A and a connecting portion 15B for connecting the front end edges of the pair of leg portions 15A. It is comprised by. Each leg portion 15A is provided with a bolt insertion hole 15C through which the bolt 16 is inserted. The connecting portion 15B is provided with an attachment notch 15D for attaching the camera 13 to the camera side bracket 15. The camera 13 is attached to the connecting portion 15B of the camera side bracket 15 using a bolt (not shown).

  The camera side bracket 15 is attached to the leg part 14A of the cover side bracket 14 by a bolt 16 so that the angle can be adjusted, and the camera 13 is fixed to the connecting part 15B of the camera side bracket 15 by a bolt (not shown). Thus, 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 up and down around the bolt 16 with respect to the cover side bracket 14. Then, the camera 13 is made to face the camera opening 11A of the engine cover 11, and the field of view of the camera 13 is adjusted so that the necessary range behind the upper swing body 4 is included, and the bolt 16 is fastened to tighten 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 who has boarded the cab 7 starts the engine 9, the hydraulic pump is driven by the engine 9. The hydraulic oil discharged from the hydraulic pump is divided into a traveling hydraulic motor, a turning hydraulic motor, a boom according to the lever operation of the traveling lever / pedal operating device provided in the cab 7, the lever operation of the working lever operating device, and the pedal operation. Discharge toward the cylinder 5E, arm cylinder 5F, bucket cylinder 5G and the like. As a result, the excavator 1 can perform a traveling operation by the lower traveling body 2, a turning operation by the upper revolving body 4, an excavation work by the work device 5, and the like.

  At this time, the camera 13 mounted near the upper end on the inner side of the engine cover 11 photographs the rear side of the counterweight 8 that is a blind spot for the operator in the cab 7, and the image captured by the camera 13 is captured in the cab 7. Displayed on the display device arranged in the screen. Thereby, the operator who operates the 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 the turning operation, the excavation operation, etc. Visibility can be improved.

  During the operation of the hydraulic excavator 1, the inspection port 8 </ b> B of the counterweight 8 is covered with the engine cover 11. At this time, the camera 13 enters the camera cover 8G provided in the inspection port 8B of the counterweight 8, as shown in FIG. For this reason, the camera 13 can be protected from the heat of the engine 9 by the camera cover 8G. That is, the camera 13 can be thermally insulated from the engine 9 by the camera cover 8G.

  On the other hand, when the angle of the camera 13 is adjusted, the lock mechanism of the engine cover 11 is unlocked, and the engine cover 11 is brought into an open state in which the inspection port 8B is opened. As a result, the camera 13 goes out of the camera cover 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 in the closed state, and covers the camera 13 with the engine 9 and the camera 13 being spaced apart. A camera cover 8G is provided. For this reason, the camera 13 attached to the engine cover 11 enters the camera cover 8G provided on the counterweight 8 with the engine cover 11 closed. Thus, the camera 13 is protected from the heat of the engine 9 by the camera cover 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 goes out of the camera cover 8G. That is, the camera 13 is exposed from the camera cover 8G. For this reason, the angle of the camera 13 can be easily adjusted by opening the engine cover 11. Therefore, in the first embodiment, the camera cover 8G can protect the camera 13 from the heat of the engine 9 and can suppress the adjustment work of the camera 13 from being troublesome.

  According to the first embodiment, the camera cover 8G includes a pair of vertical walls 8G1 and 8G2 and a horizontal wall 8G3 provided between the vertical walls 8G1 and 8G2. For this reason, the camera 13 can be entirely covered by the camera cover portion 8G including the pair of vertical walls 8G1 and 8G2 and the horizontal wall 8G3. Thereby, the camera 13 can be stably insulated from the engine 9.

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

  Next, FIG. 9 to FIG. 12 show a second embodiment. A feature of the second embodiment resides in that a camera cover is provided at the lower opening edge of the counterweight opening. In the second embodiment, the same components as those in the first embodiment described above are denoted by the same reference numerals, and description thereof is omitted.

  Also in the second embodiment, a camera cover 21 is provided in the inspection port 8B of the counterweight 8 as in the first embodiment. In the second embodiment, the camera cover 21 is provided at the lower opening edge of the inspection port 8B. That is, the camera cover 21 protrudes from the opening edge on the opening side of the inner peripheral surface of the inspection port 8B, more specifically, to the lower side of the opening edge on the rear surface 8A side and upward from the opening edge. Is provided.

  The camera cover 21 includes 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. And a lateral wall 21 </ b> C 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, extends upward from the inner peripheral surface of the inspection port 8B, and extends obliquely 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 cover 21 in a closed state covering the inspection port 8B, a camera opening that is a rectangular through hole is formed. 22 is provided. In other words, the camera opening 22 is also provided on the lower end side of the engine cover 11 as the camera cover 21 is provided on the lower side in the inspection port 8B. A camera 13 is attached at a position corresponding to the camera opening 22 on the back surface (the surface facing the engine 9) that is the inner surface of the engine cover 11.

  In the second embodiment, the camera 13 attached to the lower end side of the engine cover 11 is covered with the camera cover portion 21 as described above. The basic operation of the second embodiment is the same as that of the first embodiment described above. There is no special difference. That is, also in the second embodiment, the camera cover 21 can protect the camera 13 from the heat of the engine 9 and the adjustment work of the camera 13 is troublesome as in the first embodiment. This can be suppressed.

  In particular, in the second embodiment, the camera cover 21 is provided on the lower opening edge of the inspection port 8 </ b> B that is the opening of the counterweight 8. For this reason, the camera 13 can be arranged on the lower side of the engine cover 11 in the vertical direction. Thereby, the camera 13 can be arrange | positioned in the low position of the rear side of the upper turning body 4. FIG.

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

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

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

  In the first embodiment, the hydraulic excavator 1 including the 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. For example, a hydraulic excavator provided with another type of work device (front device) such as a hydraulic excavator provided with a mono-boom type work device or a hydraulic excavator provided with an offset type work device. Can be applied. The same applies to the second embodiment.

  In the first embodiment, the small-sized hydraulic excavator 1 has been described as an example, but may be applied to, for example, a medium-sized or larger hydraulic excavator. Moreover, although the working tool of the working 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 demolition machine (demolition hydraulic excavator) using the working tool as a crusher. be able to.

1 Excavator (construction machine)
2 Lower traveling body 4 Upper revolving body 5 Working device 6 Revolving 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)

A self-propelled lower traveling body, an upper revolving body that is turnably mounted on the lower traveling body, and a work device that is swingably attached to the upper revolving body,
The upper swing body includes a swing frame having the work device attached to the front end side, a counterweight provided on the rear end side of the swing frame to balance the weight of the work device, and a front side of the counterweight A construction machine comprising an engine mounted on the revolving frame, an engine cover that covers the engine in an openable and closable manner, and a camera that is attached to the engine cover and reflects the rear of the upper revolving body;
The counterweight is provided to penetrate between the front surface facing the engine and the rear surface opposite to 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 a closed state where the engine cover covers the opening,
The construction machine characterized in that the counterweight is provided with a camera cover part that covers the camera with the engine cover in between the engine and the camera when the engine cover is closed. . The construction machine according to claim 1,
The camera cover includes a pair of vertical walls extending upward and downward from the counterweight, and a horizontal wall separating the engine and the camera between the pair of vertical walls. machine. The construction machine according to claim 1,
The opening of the counterweight is opened in a square shape,
The construction machine according to claim 1, wherein the camera cover is provided at an opening edge on the upper side of the opening. The construction machine according to claim 1,
The opening of the counterweight is opened in a square shape,
The construction machine according to claim 1, wherein the camera cover is provided on an opening edge below the opening.

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