JP2013087542A - Construction machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric component cover which covers an electric component and serves also as a suction pipe of an air cleaner.SOLUTION: A body part 21A of an air cleaner 21 and an electric component 23 are mounted together on a rear partition plate 20 constituting a support member 14, and an electric component cover 24 demarcating a hollow box-shaped body 27 together with the rear partition plate 20 is mounted on the rear partition plate 20. In this case, the electric component cover 24 configuring the box-shaped body 27 has a lower end side outward opened, and is connected to a suction port 21D of the air cleaner 21 while surrounding the suction port 21D. Thus, the electric component cover 24 covers the electric component 23 mounted on the rear partition plate 20 to protect the electric component 23 in a waterproof state, and can serve also as a suction pipe of the cleaner 21.

Description

  The present invention relates to a construction machine such as a hydraulic excavator and a wheel loader, and more particularly to a construction machine provided with an air cleaner that cleans air supplied to an engine.

  Generally, a hydraulic excavator as a construction machine is provided with a self-propelled lower traveling body, an upper revolving body that is turnably mounted on the lower traveling body, and an upside-down movable structure on the front side of the upper revolving body. The work device is generally constructed, and the work device is moved up and down while turning the upper turning body to perform excavation work of earth and sand.

  An engine as a power source is mounted on a revolving frame serving as a base of the upper revolving structure, and this engine is covered with a building cover. In addition, an air cleaner for separating dust contained in the air is usually provided on the suction side of the engine, and this air cleaner is separated by separating the dust in the air with a filter housed in the main body. Air supplied to the engine is cleaned (for example, Patent Document 1).

  Here, in the prior art, a box-shaped intake pipe (intake duct) is connected to the intake port (air inflow pipe) of the air cleaner in order to prevent the air cleaner from sucking rain water and washing water together with air. . By connecting an intake pipe to the air cleaner intake port, rainwater or the like is prevented from being sucked into the air cleaner, and only air is supplied to the air cleaner through the intake port.

JP 2008-254519 A

  On the other hand, a hydraulic excavator is equipped with a large number of electrical components including relays, fuses and the like for controlling an electric system. Since these electrical components may be damaged due to rainwater or washing water, they are usually protected by being covered with a box-shaped electrical component cover.

  However, in the conventional technology described above, an intake pipe connected to the air cleaner inlet and an electrical component cover that covers a plurality of electrical components are provided separately. For this reason, there exists a problem that the number of parts and an assembly man-hour will increase by forming an intake pipe and an electrical component cover separately.

  In addition, by separately disposing the intake pipe and the electrical component cover in a device housing chamber that houses a mounted device such as an engine, the space in the device housing chamber is reduced. As a result, there is a problem that the degree of freedom of layout is reduced when the mounted device such as the engine is arranged in the device housing chamber.

  The present invention has been made in view of the above-described problems of the prior art, and an object thereof is to provide a construction machine that can also serve as an intake pipe of an air cleaner by using an electrical component cover that covers electrical components. .

  In order to solve the above-described problems, the present invention provides a vehicle body frame forming a support structure, a counterweight provided on the rear end side of the vehicle body frame, and mounted on the vehicle body frame positioned on the front side of the counterweight. An engine, a support member that stands on the vehicle body frame and supports a building cover that covers the engine, an air cleaner that supplies air purified by a filter housed in the main body to the engine, and an intake of the air cleaner The present invention is applied to a construction machine including an intake pipe that is connected to a mouth and introduces outside air to the air cleaner, and an electrical component that is provided to control an electric system.

  According to a first aspect of the present invention, the support member is configured such that the main body of the air cleaner and the electrical component are attached together, and the support member is protected in a waterproof state. An electrical component cover that is attached to the support member to define a hollow box-like body is provided, and the electrical component cover opens the lower side to the outside and connects the intake pipe to the suction port of the air cleaner. It is in the structure used also.

  According to a second aspect of the present invention, the air cleaner has a suction port extending downward from a main body of the air cleaner and connected to the electrical component cover.

  According to a third aspect of the present invention, the support member is a partition plate provided on the front side of the counterweight, and the electrical component cover is provided on the partition plate.

  According to the invention of claim 1, since the hollow box-shaped body is defined by the support member and the electrical component cover, the rain water and the washing water are stored in the electrical component by accommodating the electrical component in the box-shaped body. It is possible to prevent adhesion and protect the electrical component in a waterproof state. On the other hand, by connecting the electrical component cover constituting the hollow box-like body to the air cleaner suction port, the electrical component cover also serves as an intake pipe whose lower side is opened. Therefore, rain water and washing water can be dropped downward along the electrical component cover, and only air can be supplied to the air cleaner through the suction port. As a result, rainwater or the like can be prevented from being sucked into the air cleaner through the suction port, and clogging or the like can be prevented, so that the air cleaning action by the air cleaner can be maintained for a long time.

  In this case, since the electrical component and the air cleaner suction port can be covered by a common electrical component cover, it is necessary to use the electrical component cover that covers the electrical component and the intake pipe connected to the air cleaner suction port separately. Therefore, the number of parts and the number of assembling steps can be reduced, and the manufacturing cost can be reduced.

  In addition, since the electrical component cover that covers the electrical components also serves as an intake pipe connected to the air cleaner suction port, the space of the device storage chamber that houses the mounted device such as the engine can be used effectively. It is possible to increase the degree of freedom in layout when the mounted device is arranged in the device housing chamber.

  According to the second aspect of the present invention, the suction port of the air cleaner extends downward from the main body portion and is connected to the electrical component cover, so that rain water or the like scattered on the air cleaner travels along the outer surface of the air cleaner and the tip of the suction port. Even if it has flowed up to, this rain water or the like can be dropped downward from the suction port. As a result, rainwater or the like can be prevented from being sucked into the air cleaner through the suction port, and clogging or the like can be reliably prevented.

  According to the invention of claim 3, the box-shaped body defined by the partition plate provided on the front side of the counterweight and the electrical component cover can be disposed close to the partition plate. Thereby, it can suppress that a box-shaped body obstructs the mounting apparatus accommodated in a building cover, and the freedom degree of the layout at the time of arrange | positioning a mounting apparatus can be raised further.

1 is a front view showing a hydraulic excavator according to an embodiment of the present invention. It is a top view which shows a hydraulic shovel. It is a partially broken front view which expands and shows the building cover, support member, air cleaner, etc. in FIG. It is the top view which looked at the building cover in FIG. 3, a support member, an air cleaner, etc. from upper direction. It is a partially broken perspective view showing a building cover, a support member, an air cleaner, an electrical component cover, and the like. It is a perspective view which shows a rear partition plate, an electrical component cover, an air cleaner, an electrical component, etc. It is a disassembled perspective view which shows a support member, an electrical component cover, an air cleaner, an electrical component, etc. It is sectional drawing which looked at the support member and the electrical component cover from the arrow VIII-VIII direction in FIG.

  Hereinafter, an embodiment of a construction machine according to the present invention will be described in detail with reference to FIGS. 1 to 8 by taking as an example a case where the construction machine is applied to a hydraulic excavator.

  In the figure, reference numeral 1 denotes a hydraulic excavator as a typical example of a construction machine, and the hydraulic excavator 1 is configured as a so-called small hydraulic excavator having a total weight of 7 tons or less, for example. The hydraulic excavator 1 includes a self-propelled lower traveling body 2 having left and right crawler belts 2A, an upper revolving body 3 that is turnably mounted on the lower traveling body 2, and a front portion of the upper revolving body 3 It is roughly constituted by the working device 4 provided so as to be able to move up and down. The upper swing body 3 includes a swing frame 5, a counterweight 6, a cab 13, a building cover 18 and the like which will be described later.

  Reference numeral 5 denotes a turning frame as a vehicle body frame serving as a base of the upper turning body 3. The revolving frame 5 forms a strong support structure and is mounted on the lower traveling body 2 so as to be revolving. The working device 4 is attached to the front end side of the revolving frame 5 so as to be able to move up and down, and the counterweight 6 is attached to the rear end side of the revolving frame 5 to balance the weight with the working device 4. In addition, an engine 7 and a heat exchange device 10 which will be described later are disposed on the front side of the counterweight 6.

  Reference numeral 7 denotes an engine mounted on the revolving frame 5 on the front side of the counterweight 6, and the engine 7 is supported in a horizontally placed state in which the axis of a crankshaft (not shown) extends leftward and rightward. Yes. A cooling fan 7A for supplying cooling air to a heat exchange device 10 described later is provided on the left side of the engine 7, and a hydraulic pump 9 described later is attached to the right side of the engine 7.

  Reference numeral 8 denotes an air introduction pipe for introducing air into the engine 7. The base end side (downstream side) of the air introduction pipe 8 is connected to the suction side of the engine 7, and the distal end side (upstream side) of the air introduction pipe 8. ) Is provided with an air cleaner 21 to be described later.

  A hydraulic pump 9 is attached to the right side of the engine 7, and the hydraulic pump 9 is driven by the engine 7. The hydraulic pump 9 discharges pressure oil for operation toward various hydraulic actuators provided in the lower traveling body 2, the upper swing body 3, and the work device 4.

  Reference numeral 10 denotes a heat exchange device provided on the left side of the engine 7 so as to face the cooling fan 7A. The heat exchange device 10 includes, for example, a radiator that cools engine cooling water, an oil cooler that cools hydraulic oil, an intercooler that cools air compressed by a turbocharger (not shown), and the like. The engine 7, the hydraulic pump 9, the heat exchange device 10 and the like described above are configured to be covered with a building cover 18 described later.

  Reference numeral 11 denotes a hydraulic oil tank disposed on the right side of the front portion of the revolving frame 5. The hydraulic oil tank 11 stores hydraulic oil supplied to various hydraulic actuators mounted on the hydraulic excavator 1. Reference numeral 12 denotes a fuel tank disposed on the front side of the hydraulic oil tank 11. The fuel tank 12 stores fuel supplied to the engine 7.

  Reference numeral 13 denotes a cab disposed on the left side of the front portion of the swivel frame 5 adjacent to the left side of the work device 4. The cab 13 defines a driver's cab in which an operator is boarded, and a driver's seat on which the operator is seated and various operation levers (none of which are shown) operated by the operator are arranged. ing.

  Reference numeral 14 denotes a support member erected on the rear side of the revolving frame 5. The support member 14 supports a building cover 18 described later. Here, the support member 14 includes a front partition plate 15 extending left and right on the revolving frame 5 so as to partition the engine 7 and the heat exchange device 11 and the cab 13, and a left end side of the front partition plate 15. The left front partition plate 16, which rises upward from the revolving frame 5 while facing the rear surface 13A of the cab 13, the rear partition plate 20, which will be described later, and the left front partition plate 16 and the rear partition plate 20 are connected to each other. And a connecting member 17 made of a bent rod-like body.

  Reference numeral 18 denotes a building cover provided on the revolving frame 5 located on the front side of the counterweight 6. The building cover 18 extends left and right between the cab 13 and the hydraulic oil tank 11 and the counterweight 6, and covers the engine 7, the hydraulic pump 9, the heat exchanger 10, the air cleaner 21 described later, and the like. . Here, the building cover 18 is disposed on the left end side of the engine cover 18A so that the mounted device such as the engine 7 can be opened and closed from above, and the mounted device can be opened and closed from the left side. The left side door cover 18B is covered, and the right side door cover 18C is disposed on the right end side of the engine cover 18A and covers the mounted device so that it can be opened and closed from the right side.

  As a result, a device storage chamber 19 is defined on the revolving frame 5 by the building cover 18, and the engine 7, the hydraulic pump 9, the heat exchange device 10, an air cleaner 21 described later, and the like are stored in the device storage chamber 19. It becomes the composition which is done.

  In this case, the engine cover 18 </ b> A extends left and right between the cab 13 and the counterweight 6. The front end portion of the engine cover 18A is rotatably attached to the front partition plate 15 of the support member 14 via a hinge mechanism, and the rear end side of the engine cover 18A is upward, downward, frontward, and rearward. It is configured to rotate (open, close).

  On the other hand, the left side door cover 18 </ b> B extends forward and rearward between the cab 13 and the left end portion of the counterweight 6. A front end side of the left side door cover 18B is rotatably attached to a side end surface portion of the left front partition plate 16 via a hinge mechanism or the like, and a rear end side of the left side door cover 18B is a rear partition plate described later. 20 is attached to the other side end face portion 20E through a catch mechanism or the like in a detachable manner.

  Next, the rear partition plate which comprises the support member 14 with the above-mentioned front partition plate 15, the left front partition plate 16, etc. is demonstrated.

  Reference numeral 20 denotes a rear partition plate provided on the left front side of the counterweight 6, and the lower end side of the rear partition plate 20 is fixed to the revolving frame 5 using a bolt (not shown), whereby the counterweight 6 It is erected on the revolving frame 5 in a state of facing the front surface of. As shown in FIGS. 5 to 7, the rear partition plate 20 forms a left side portion of the device accommodating chamber 19 between the left front partition plate 16 and the left side door cover 18 </ b> B together with the left front partition plate 16. It is something to support.

  Here, the rear partition plate 20 faces the front surface of the counterweight 6 and rises upward from the revolving frame 5 while rising, and an upper end surface 20B that protrudes horizontally from the upper end of the rising surface 20A, A flange portion 20C that is bent downward while facing the rising surface portion 20A from the protruding end side of the upper end surface portion 20B, and a one-side end surface portion 20D that is bent forward from one side end portion of the rising surface portion 20A. The other end surface portion 20E is bent forward from the other side end portion of the rising surface portion 20A.

  In this case, an electrical component 23 to be described later is attached to the rising surface portion 20A, and two bolt insertion holes 20A1 are formed in the rising surface portion 20A in the vicinity of the other end surface portion 20E so as to be spaced apart in the upward and downward directions. It is installed. On the other hand, an air cleaner 21, which will be described later, is attached to the upper end surface portion 20B. A large-diameter hole 20B1 through which a suction port 21D of the air cleaner 21 is inserted, and two bolt insertion holes 20B2 disposed in the vicinity of the large-diameter hole 20B1. Is drilled. Further, two bolt insertion holes 20C1 are formed in the flange portion 20C. Further, the other side end surface portion 20E is configured to support the rear end portion of the left side door cover 18B.

  Reference numeral 21 denotes a centrifugal air cleaner attached to the rear partition plate 20. The air cleaner 21 is provided on the upstream side of the air introduction pipe 8 connected to the suction side of the engine 7, centrifuges dust in the air supplied to the engine 7, and supplies only purified air to the engine 7. To do.

  Here, the air cleaner 21 is provided in a main body portion 21A composed of a cylindrical tube, a filter 21B that is accommodated in the main body portion 21A and captures dust in the air, and a central portion in the axial direction of the main body portion 21A. A mounting base 21C, a cylindrical suction port 21D that extends downward from the outer peripheral side of the main body portion 21A and sucks air from an opening at the lower end side, and is provided at one end side in the axial direction of the main body portion 21A for cleaning. The exhaust port 21E that discharges the air to the air introduction tube 8 and the dust discharge tube 21F that protrudes downward from the other axial end of the main body 21A and discharges the separated dust to the outside.

  As shown in FIG. 7, the air cleaner 21 has bolts 22 inserted from below into the bolt insertion holes 20B2 of the upper end surface portion 20B with the mounting base 21C placed on the upper end surface portion 20B of the rear partition plate 20. Are attached to the upper end surface portion 20B of the rear partition plate 20. In this state, the air inlet 21 </ b> D of the air cleaner 21 is inserted into the large-diameter hole 20 </ b> B <b> 1 provided in the upper end surface portion 20 </ b> B of the rear partition plate 20, and the outlet 21 </ b> E of the air cleaner 21 is connected to the air introduction pipe 8 extending from the engine 7. Has been.

  The air cleaner 21 captures dust in the air sucked into the main body portion 21A through the suction port 21D by the filter 21B, and rotates the air in the main body portion 21A to centrifuge the dust. By discharging the dust to the outside through the dust discharge pipe 21F, only the cleaned air is discharged to the air introduction pipe 8 through the discharge port 21E and supplied to the engine 7.

  Reference numeral 23 denotes a plurality of electrical components provided on the rear partition plate 20 of the support member 14. These electrical components 23 are composed of relays, fuses, and the like, for example, and control an electrical system for supplying power to electrical equipment mounted on the hydraulic excavator 1. Here, the electrical component 23 is attached to the rising surface portion 20A of the rear partition plate 20, and is covered with an electrical component cover 24, which will be described later, so that it is protected from rainwater, washing water, and the like in a waterproof state.

  Next, the electrical component cover 24 attached to the rear partition plate 20 of the support member 14 will be described.

  Reference numeral 24 denotes an electrical component cover attached to the rear partition plate 20. This electrical component cover 24 is formed by bending a rectangular flat plate, covers each electrical component 23, and also serves as an intake pipe to which the suction port 21D of the air cleaner 21 is connected.

  Here, as shown in FIGS. 6 to 8, the electrical component cover 24 includes a front partition 24 </ b> A that faces the rising surface 20 </ b> A of the rear partition plate 20 with an interval, and a rear partition from one side end of the front partition 24 </ b> A. An inclined folded curved surface portion 24B bent so as to incline toward one side end surface portion 20D of the plate 20, and a substantially right angle from the other side end portion of the front surface portion 24A toward the rising surface portion 20A of the rear partition plate 20. The bent right curved surface portion 24 </ b> C and a mounting surface portion 24 </ b> D provided at an end of the right folded surface portion 24 </ b> C and in contact with the rising surface portion 20 </ b> A of the rear partition plate 20 are configured.

  Further, two bolt insertion holes 24A1 corresponding to the bolt insertion holes 20C1 drilled in the flange portion 20C of the rear partition plate 20 are drilled on the upper end side of the front surface portion 24A, and the mounting surface portion 24D has a rear surface. Two bolt insertion holes 24D1 corresponding to the bolt insertion holes 20A1 drilled in the rising surface portion 20A of the partition plate 20 are drilled.

  Then, as shown in FIG. 7, the bolt 25 is inserted through the bolt insertion hole 24D1 provided in the mounting surface portion 24D of the electrical component cover 24 and the bolt insertion hole 20A1 provided in the rising surface portion 20A of the rear partition plate 20, The bolts 25 are inserted into the bolt insertion holes 24A1 provided in the front surface portion 24A of the electrical component cover 24 and the bolt insertion holes 20C1 provided in the flange portion 20C of the rear partition plate 20, and the nuts 26 are screwed into the respective bolts 25. The electrical component cover 24 is attached to the rear partition plate 20 by wearing.

  At this time, the upper end edge 24E of the electrical component cover 24 is in contact with the periphery of the upper end surface portion 20B provided on the rear partition plate 20 without a gap, and the side edge 24F of the inclined folded curved surface portion 24B of the electrical component cover 24 is It abuts on the side edge of one side end face portion 20D provided on the partition plate 20 without a gap. On the other hand, the lower end edge 24G of the electrical component cover 24 is separated from the rising surface portion 20A of the rear partition plate 20 by the amount by which the upper end surface portion 20B protrudes. Accordingly, as shown in FIGS. 6 and 8, a hollow box-like body having a pentagonal cross-sectional shape by the rising surface portion 20A, the upper end surface portion 20B, the one side end surface portion 20D and the electrical component cover 24 of the rear partition plate 20. 27 is defined, and the lower end portion of the box-like body 27 is an opening portion 27A.

  As described above, the electrical component cover 24 is attached to the rear partition plate 20 to define a hollow box-shaped body 27, and the electrical component 23 is accommodated in the box-shaped body 27, thereby allowing rainwater and washing water to be contained. Therefore, the electrical component 23 can be protected in a waterproof state.

  Further, by inserting the suction port 21D of the air cleaner 21 into the large-diameter hole 20B1 formed in the upper end surface portion 20B of the rear partition plate 20 constituting the box 27, the electrical component cover 24 and the rear partition plate 20 The defined box-shaped body 27 functions as an intake pipe (intake duct) connected to the suction port 21 </ b> D of the air cleaner 21. In this case, when the air is sucked into the suction port 21D of the air cleaner 21 by the operation of the engine 7, the opening 27A on the lower end side of the box-shaped body 27 is not sucked into the suction port 21D along with this air. Is set to just the area.

  Thus, the electrical component cover 24 that defines the box-shaped body 27 together with the rear partition plate 20 is connected to the suction port 21D in a state of surrounding the suction port 21D of the air cleaner 21, and also serves as the intake pipe of the cleaner 21. It is the composition to do.

  The hydraulic excavator 1 according to the present embodiment has the above-described configuration. The hydraulic excavator 1 is self-propelled to the work site by the lower traveling body 2 and then lifts the working device 4 while turning the upper revolving body 3. The excavation work of earth and sand is performed by moving it.

  Here, the electrical component cover 24 covering each electrical component 23 attached to the rear partition plate 20 defines a box-shaped body 27 together with the rear partition plate 20, and the box-shaped body 27 is a suction port 21 </ b> D of the air cleaner 21. Functions as an intake pipe connected to the.

  For this reason, when the inside of the air introduction pipe 8 connected to the suction side of the engine 7 becomes negative pressure during the operation of the engine 7, air is introduced into the suction port 21 </ b> D of the air cleaner 21 connected to the upstream side of the air introduction pipe 8. (Outside air) is inhaled. In this case, since the box-shaped body 27 as an intake pipe is connected to the suction port 21D of the air cleaner 21, air is introduced into the box-shaped body 27 from the opening 27A of the box-shaped body 27, and then the air cleaner 21. Is sucked into the main body 21A through the suction port 21D.

  The air sucked into the main body portion 21A of the air cleaner 21 generates a swirling flow within the main body portion 21A. Thereby, the dust mixed in the air is centrifuged in the main body 21A and is captured by the filter 21B accommodated in the main body 21A. In this way, by removing dust in the air by the air cleaner 21, only clean air is discharged from the discharge port 21 </ b> E of the air cleaner 21 to the air introduction pipe 8 and supplied to the engine 7 through the air introduction pipe 8. Can do. Therefore, even in a work site where a large amount of dust is mixed in the air, such as a crushed stone site, only the air cleaned by the air cleaner 21 can be supplied to the engine 7 and the life of the engine 7 can be extended.

  On the other hand, when the hydraulic excavator 1 is operated in the rain, a part of rainwater enters the equipment storage chamber 19 covered with the building cover 18. In this case, since the electrical component 23 attached to the rear partition plate 20 is accommodated in a box-shaped body 27 defined by the electrical component cover 24 and the rear partition plate 20, the electrical component 23 is waterproofed from rainwater. Can be protected. As a result, it is possible to reliably prevent rainwater or the like from adhering to the electrical component 23, and improve the durability of the electrical component 23.

  Further, the box-shaped body 27 defined by the rear partition plate 20 and the electrical component cover 24 functions as an intake pipe connected to the suction port 21D of the air cleaner 21, thereby allowing rainwater to flow into the rear partition plate 20 and the electrical component. The air can be dropped downward along the product cover 24, and only the air introduced into the box 27 can be supplied into the air cleaner 21 through the suction port 21D. For this reason, clogging of the filter 21B and the like can be suppressed, and the air cleaning action by the air cleaner 21 can be maintained over a long period of time.

  Moreover, the air cleaner 21 is inserted into the box-shaped body 27 defined by the rear partition plate 20 and the electrical component cover 24 in a state where the suction port 21D of the air cleaner 21 extends downward from the outer peripheral side of the main body portion 21A. Even if rainwater or the like scattered on the outer surface of 21 flows along the outer surface of the air cleaner 21 to the tip of the suction port 21D, the rainwater or the like can be dropped downward from the suction port 21D. As a result, rainwater or the like can be prevented from being sucked into the main body portion 21A through the suction port 21D, and clogging or the like can be reliably prevented.

  Thus, according to the present embodiment, the body part 21A of the air cleaner 21 and the electrical component 23 are attached together to the rear partition plate 20 constituting the support member 14, and the rear partition plate 20 has the rear partition plate 20 attached thereto. In addition, an electrical component cover 24 that defines a hollow box 27 is attached. And the electrical equipment cover 24 which comprises the box-shaped body 27 is connected to the said suction inlet 21D in the state which the lower end side opened outside and the suction inlet 21D of the air cleaner 21 was surrounded. Thereby, the electrical component cover 24 can cover the electrical component 23 attached to the rear partition plate 20 and protect it in a waterproof state, and can also serve as the intake pipe of the air cleaner 21.

  Thus, according to the present embodiment, since the electrical component 23 and the suction port 21D of the air cleaner 21 can be covered by the common electrical component cover 24, the intake pipe connected to the suction port 21D of the air cleaner 21 Need not be provided separately from the electrical component cover 24 that covers the electrical component 23. As a result, the number of parts and assembly man-hours can be reduced, which can contribute to a reduction in manufacturing cost.

  In addition, since the electrical component cover 24 covering the electrical component 23 also serves as an intake pipe connected to the suction port 21D of the air cleaner 21, the space of the equipment storage chamber 19 covered by the building cover 18 can be effectively used. Can do. As a result, it is possible to increase the degree of freedom of layout when the mounted devices such as the engine 7, the hydraulic pump 9, the heat exchange device 10, and the air cleaner 21 are arranged in the device storage chamber 19.

  Further, by attaching the electrical component cover 24 to the rear partition plate 20 provided on the left front side of the counterweight 6, the box-shaped body 27 defined by the rear partition plate 20 and the electrical component cover 24 is replaced with the rear partition plate 20. Can be placed close to. As a result, it is possible to suppress the box-like body 27 from interfering with the mounted device disposed in the device storage chamber 19, and to further increase the degree of freedom in layout when the mounted device is disposed in the device storage chamber 19. Can do.

  In the above-described embodiment, the case where the air cleaner 21, the electrical component 23, and the electrical component cover 24 are attached to the rear partition plate 20 is illustrated. However, the present invention is not limited to this. For example, the air cleaner 21, the electrical component 23, and the electrical component cover 24 may be attached to the left front partition plate 16.

  In the embodiment described above, the hydraulic excavator 1 is taken as an example of the construction machine. However, the present invention is not limited to this. For example, the construction machine is widely used in construction machines equipped with an air cleaner and a precleaner such as a wheel loader and a hydraulic crane. Can be applied.

1 Excavator (construction machine)
5 Turning frame (body frame)
6 Counterweight 7 Engine 14 Support member 18 Building cover 20 Rear partition plate 21 Air cleaner 21A Main body 21B Filter 21D Suction port 23 Electrical component 24 Electrical component cover 27 Box 27A Opening

Claims (3)

A vehicle body frame forming a support structure, a counterweight provided on the rear end side of the vehicle body frame, an engine mounted on the vehicle body frame positioned on the front side of the counterweight, and standing on the vehicle body frame A support member that supports the building cover that covers the engine, an air cleaner that supplies air purified by a filter housed in the main body to the engine, and an air cleaner that is connected to a suction port of the air cleaner. In a construction machine comprising an intake pipe that introduces and an electrical component provided to control the electrical system,
The support member is configured to attach the main body of the air cleaner and the electrical component together,
The support member is provided with an electrical component cover that is attached to the support member to define the hollow box-like body in order to protect the electrical component in a waterproof state.
The electrical equipment cover is a construction machine characterized in that the lower side is opened to the outside and connected to the suction port of the air cleaner to serve also as the intake pipe.   The construction machine according to claim 1, wherein a suction port of the air cleaner is provided so as to extend downward from a main body portion of the air cleaner and is connected to the electrical component cover.   The construction machine according to claim 1 or 2, wherein the support member is a partition plate provided on a front side of the counterweight, and the electrical component cover is provided on the partition plate.

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