JP5527334B2 - Construction machinery - Google Patents

Description

  The present invention relates to a construction machine.

  2. Description of the Related Art Conventionally, a construction machine is known that includes a lower traveling body, an upper swing body mounted on the lower traveling body, and a machine room cover that covers a machine room provided on the upper swing body (for example, a patent) Reference 1).

  In the machine room of the construction machine, an intake duct, a radiator, a fan, and an engine are disposed in order from the upstream side in the air flow direction. An air filter is attached to the intake duct. Equipment such as an air cleaner is installed inside the intake duct. When the engine is driven, air is taken into the machine room from the intake port of the machine room cover by the rotation of the fan. The taken-in air exchanges heat with the refrigerant flowing through the radiator through the intake duct and is discharged out of the machine room through the exhaust port of the machine room cover.

JP 2008-174004 A

  By the way, if equipment such as an air cleaner is installed inside the air intake duct, the air flow through the air intake duct toward the core surface of the radiator will be hindered, and the heat exchange efficiency at the radiator will be reduced and the performance will be fully demonstrated. It may not be possible. Moreover, it is necessary to increase the size of the intake duct in order to secure a space for housing the equipment, and there is a problem that the structure becomes complicated and the weight increases. On the other hand, the present inventor considered not to install the device inside the intake duct but to arrange the device upstream of the intake duct in the air flow direction.

  However, when the device is disposed upstream of the air intake duct in the air flow direction, there is a problem that when the air filter is removed from the air intake duct and replaced, the device becomes an obstacle and maintenance is difficult. . Therefore, it may be possible to secure a work space for attaching and detaching the air filter by increasing the distance between the intake duct and the device, but this is not preferable because the upper-part turning body becomes large.

  The present invention has been made in view of this point, and an object of the present invention is to arrange the air filter and the device in a limited space and to sufficiently secure a work space for attaching and detaching the air filter. is there.

  The present invention is directed to a construction machine including a lower traveling body, an upper revolving body mounted on the lower traveling body, and a machine room cover that covers a machine room provided on the upper revolving body. The solution was taken.

That is, the first invention is a radiator disposed in the machine room such that the core surface faces the left-right direction of the vehicle,
An intake duct disposed upstream of the radiator in the air flow direction;
An air filter that is detachably attached to the intake duct with a filter surface facing the core surface of the radiator;
A device disposed upstream of the air filter in the air flow direction,
The intake duct has an air filter mounting portion for mounting the air filter, and a device mounting portion that is formed integrally with the air filter mounting portion and mounts the device.
The air filter mounting portion has a pair of guide plates respectively disposed along the upper and lower surfaces of the air filter,
The air filter is accommodated between the pair of guide plates and attached to the intake duct so that the filter surface is inclined toward the radiator side toward the rear of the vehicle. A work space for attaching and detaching the air filter is provided.

  In the first invention, the equipment, the intake duct, and the radiator are arranged in the machine room in order from the upstream side in the air flow direction. An air filter is detachably attached to the intake duct. The filter surface of the air filter is inclined toward the radiator as it goes rearward of the vehicle. As a result, a work space for attaching and detaching the air filter is provided between the air filter and the device.

  With such a configuration, the air filter and the device can be arranged in a limited space, and a work space for attaching and detaching the air filter can be secured sufficiently. Specifically, when replacing the air filter, it is necessary to pull the air filter forward and remove it from the intake duct. However, when the distance between the air filter and the device is narrow, there is a problem that the air filter interferes with the device and the air filter cannot be removed.

  On the other hand, in the present invention, the filter surface of the air filter is inclined toward the radiator side toward the rear of the vehicle, so that a triangular work space is provided between the air filter and the device in plan view. Become. Then, by pulling out the end of the air filter on the vehicle rear side into the work space, the air filter can be smoothly removed from the intake duct.

  In particular, when the air filters are arranged in two upper and lower stages, it is possible to effectively remove the upper air filter by providing such a work space. Specifically, a maintenance hole for inserting the air filter is formed in the machine chamber cover, but the upper edge portion of the maintenance hole partially overlaps the upper air filter. This is to secure the weight of the counterweight by making the opening area of the maintenance hole the minimum necessary. Therefore, the upper air filter cannot be pulled out toward the maintenance hole if it remains at its height. Therefore, when removing the upper air filter, the upper air filter may be pulled out from the maintenance hole by pulling it down to the working space side and then lowering it to the height position of the lower air filter.

Furthermore, in the first invention, the intake duct has an air filter mounting portion and a device mounting portion. The air filter mounting portion and the device mounting portion are integrally formed.

With such a configuration, the distance between the air filter and the device can be kept constant only by attaching the air filter and the device to the intake duct. That is, as compared with the case where the air filter and the device are separately provided in the machine room, variation in the distance between the air filter and the device can be suppressed, and the assembly workability is improved.

According to a second invention, in the first invention,
A lock member for fixing the air filter in contact with a side wall portion of the air filter on the vehicle rear side is provided.

In the second invention, the side wall of the air filter on the vehicle rear side is fixed by the lock member. With such a configuration, the air filter can be securely fixed so as not to drop out of the intake duct .

  According to the present invention, since the filter surface of the air filter is inclined toward the radiator side toward the rear of the vehicle, a triangular work space is provided between the air filter and the device in plan view. Then, by pulling out the end of the air filter on the vehicle rear side into the work space, the air filter can be smoothly removed from the intake duct.

1 is a perspective view showing an overall configuration of a construction machine according to an embodiment of the present invention. It is a top view which shows the internal structure of an upper revolving body. It is a rear view which shows the internal structure of an upper turning body. It is a perspective view which shows the structure of an air intake duct. It is a perspective view which shows the structure of the projection plate of an air filter. It is a perspective view which shows the structure of a locking member. It is a top view which shows the state which unlocked the locking member. It is a top view which shows the state which pulled out the air filter in the working space.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. It should be noted that the following description of the preferred embodiment is merely illustrative in nature and is not intended to limit the present invention, its application, or its use.

  FIG. 1 is a perspective view showing an overall configuration of a construction machine according to an embodiment of the present invention. In FIG. 1, up and down and front and rear, left and right directions are indicated by arrows. Unless stated otherwise, the vertical direction will be described according to the directions indicated by these arrows.

  As shown in FIG. 1, the construction machine 10 includes a crawler type lower traveling body 11 and an upper revolving body 20 that is rotatably mounted on the lower traveling body 11. The upper swing body 20 includes an attachment 13, a cab 14, a machine room 15, an upper frame 21, and the like. Incidentally, the construction machine 10 of this embodiment is a small turning type. The upper turning body 20 is configured to be relatively small so that the turning radius becomes smaller, and the outline of the rear part of the upper turning body 20 is formed in an arc shape when viewed from above.

  The attachment 13 is installed in the front part of the upper turning body 20, and is composed of a boom 13a, an arm 13b, a bucket 13c, and the like. Each of the booms 13a and the like operates in conjunction with the expansion and contraction of the hydraulic cylinder 13d that is hydraulically controlled, and performs operations such as excavation. The operation of the boom 13a and the like is performed in the cab 14.

  The cab 14 is a rectangular box-shaped cab, and is installed adjacent to the attachment 13 at the left front portion of the upper swing body 20. The machine room 15 is provided at the rear part of the upper swing body 20. The periphery of the machine room 15 is covered with a machine room cover 16. An engine 31 (see FIG. 2), hydraulic equipment, and the like are housed in the machine room 15 in a dense state. In this construction machine 10, a machine room cover 16 that covers the rear part of the machine room 15 also serves as a counterweight that ensures a front-rear balance with the attachment 13.

  A maintenance hole 17 is formed in the left rear portion of the machine room cover 16. An openable / closable door 18 is attached to the maintenance hole 17. The maintenance hole 17 is an opening for performing maintenance of various devices arranged in the machine room 15, and an air filter 50 to be described later is inserted through the maintenance hole 17, so that the air filter 50 can be replaced. It can be carried out.

  FIG. 2 is a plan view showing an internal configuration of the upper swing body. As shown in FIG. 2, the upper frame 21 is installed at the lower part of the upper swing body 20, and the cab 14, the machine room 15, and the like are arranged on the upper frame 21. The upper frame 21 is provided with a bottom plate 22, a pair of vertical plates 23, a beam plate 24, a pedestal 25, and the like.

  The bottom plate 22 is a metal plate material whose upper surface greatly extends, and the cab 14 is installed at the left corner of the front side. Although not shown, a turning mechanism is provided at a front portion in the middle of the width direction of the bottom plate 22, and the bottom plate 22 is supported by the lower traveling body 11 so as to be turnable by this turning mechanism.

  The pair of vertical plates 23 extend in parallel in the front-rear direction from the front end portion to the rear end portion of the bottom plate 22 in the middle portion of the bottom plate 22 in the left-right width direction. The vertical plate 23 is erected so as to be welded to the bottom plate 22 and orthogonal to the bottom plate 22. Between the pair of vertical plates 23, the boom 13a of the attachment 13 is rotatably supported. The vertical plate 23 is provided with a pedestal 25 for the engine 31.

  The beam plate 24 is a band-shaped metal plate material, and is disposed so as to extend in the width direction from the left end portion to the right end portion of the bottom plate 22 in the middle portion of the bottom plate 22 in the front-rear direction. They are joined together.

  FIG. 3 is a rear view showing an internal configuration of the upper swing body. As shown in FIG. 3, the engine 31 is installed on the base 25 via a vibration isolator 31a. The engine 31 is accommodated in the machine room 15 so that the drive shaft thereof faces in the left-right direction of the bottom plate 22. An intake port 16 a is formed in the upper left portion of the machine room cover 16. An exhaust port 16 b is formed on the upper right side of the machine room cover 16.

  In addition to the engine 31, a hydraulic pump 32, a radiator 33, a fan 34, an intake duct 40, and the like are accommodated inside the machine room 15. In this construction machine 10, an intake duct 40, a radiator 33, a fan 34, an engine 31, and a hydraulic pump 32 are arranged side by side in order from the upstream side in the air flow direction.

  The radiator 33 is disposed so that the core surface faces the left-right direction of the vehicle. The fan 34 is connected to the left end of the drive shaft of the engine 31 and is disposed between the engine 31 and the radiator 33. The hydraulic pump 32 is connected to the right end portion of the drive shaft of the engine 31 and is located on the right side portion of the machine room 15.

  As shown by the arrow line in FIG. 3, in this construction machine 10, when the engine 31 is driven, an air flow from the left side to the right side is formed inside the machine room 15, and the refrigerant 33 exchanges heat with the air. As a result, the engine 31 and the like are cooled. Specifically, air is taken into the machine chamber 15 from the intake port 16 a by the rotation of the fan 34. The taken-in air passes through the radiator 33, absorbs the heat of the refrigerant flowing through the radiator 33, becomes hot air, and is discharged out of the machine room 15 through the exhaust port 16b.

  As shown in FIG. 4, the intake duct 40 includes a box-shaped duct body 41 that opens from the upstream side to the downstream side in the air flow direction. The duct body 41 is provided with an air filter mounting portion 42 for mounting the air filter 50 and a device mounting portion 56 for mounting an air cleaner 55 as a device.

  The air cleaner 55 collects air supplied to the engine 31, and is connected to an intake pipe 55 a bypassed from the duct body 41 and an exhaust pipe (not shown) directed to the engine 31.

  The air filter mounting portion 42 is provided in the opening on the upstream side of the duct body 41. A specific configuration of the air filter mounting portion 42 will be described later. Two air filters 50 arranged so as to be arranged in the vertical direction are detachably attached to the air filter attachment portion 42. The upper air filter 50 partially overlaps the upper edge of the maintenance hole 17 when viewed from the vehicle rear side (see FIG. 3).

  As for the air filter 50, the filter surface inclines to the radiator 33 side as it goes to the vehicle rear side. Thus, a triangular work space S (see the hatched area in FIG. 7) is provided between the air filter 50 and the air cleaner 55 in plan view.

  The air filter attachment portion 42 and the device attachment portion 56 are integrally formed. Thereby, the distance between the air filter 50 and the air cleaner 55 can be kept constant only by attaching the air filter 50 and the air cleaner 55 to the intake duct 40. That is, as compared with the case where the air filter 50 and the air cleaner 55 are separately provided in the machine room 15, variation in the distance between the air filter 50 and the air cleaner 55 can be suppressed, and the assembly workability is improved.

  The air filter mounting portion 42 is disposed on a pair of guide plates 43 disposed along the upper and lower surfaces of the air filter 50, a contact plate 44 disposed on the vehicle front side, and a vehicle rear side. And a locking member 45.

  The pair of guide plates 43 accommodates the air filter 50 therebetween. Further, the pair of guide plates 43 function as guides when the air filter 50 is inserted through the maintenance hole 17 of the machine room cover 16.

  As shown in FIG. 5, the upper guide plate 43 is formed with a notch hole 43 a that opens to the vehicle rear side. On the upper surface of the air filter 50, a protruding plate 50a that is bent so as to protrude upward is attached. When the air filter 50 is accommodated between the pair of guide plates 43, the air filter 50 is positioned in the thickness direction by fitting the protruding plate 50 a into the notch hole 43 a of the guide plate 43.

  The contact plate 44 contacts the side wall surface of the air filter 50 on the vehicle front side, so that the air filter 50 is positioned in the depth direction. Further, the vehicle left end of the contact plate 44 is bent toward the vehicle rear side, and the bent portion contacts the vehicle left surface of the air filter 50, whereby the air filter 50 is positioned in the thickness direction. .

  As shown in FIG. 7, the lock member 45 includes a lock plate 46 that contacts the side wall surface of the air filter 50 on the vehicle rear side, an arm plate 47 attached to the lock plate 46, and a rotation center of the lock plate 46. A fastening bolt 48 and a fastening nut 49 are provided.

  The lock plate 46 is in contact with the side wall surface of the air filter 50, thereby sandwiching and fixing the air filter 50 with the contact plate 44. The lock plate 46 is moved between a lock position for fixing the air filter 50 and a release position for releasing the lock state of the air filter 50 by rotating around the bolt shaft of the fastening bolt 48 together with the arm plate 47. It is free. The lock plate 46 can be fixed at the lock position by tightening the fastening nut 49 in a state where the lock plate 46 is in contact with the side wall surface of the air filter 50.

-Removal procedure of air filter-
Next, a procedure for removing the air filter 50 from the intake duct 40 will be described with reference to FIGS. 7 and 8. First, as shown in FIG. 7, the lock plate 46 of the lock member 45 is rotated to release the locked state of the air filter 50, and the air filter 50 is pulled out along the pair of guide plates 43 toward the vehicle rear side. The fitting between the cutout hole 43a and the protruding plate 50a is released.

  Then, as shown in FIG. 8, after the end of the air filter 50 on the vehicle rear side is pulled out toward the work space S, the air filter 50 is pulled out from the maintenance hole 17. Thereby, the air filter 50 can be removed from the intake duct 40.

  As described above, the work space S is provided between the air filter 50 and the air cleaner 55 by inclining the filter surface of the air filter 50 toward the radiator 33 toward the rear of the vehicle. The air cleaner 55 can be disposed in a limited space, and a sufficient working space S for attaching / detaching the air filter 50 can be secured.

  In particular, when the air filter 50 is arranged in two upper and lower stages as in the present embodiment, the work of removing the upper air filter 50 can be effectively performed by providing such a work space S. It can be carried out. Specifically, the maintenance hole 17 formed in the machine room cover 16 partially overlaps the upper edge air filter 50 (see FIG. 3). This is to secure the weight of the counterweight by making the opening area of the maintenance hole 17 the minimum necessary. For this reason, the upper air filter 50 cannot be pulled out toward the maintenance hole 17 if it remains at its height. Therefore, when removing the upper air filter 50, the upper air filter 50 is pulled out from the maintenance hole 17 by being pulled out to the working space S side and then lowered to the height position of the lower air filter 50. be able to.

<< Other Embodiments >>
About the said embodiment, it is good also as following structures.

  In the present embodiment, the air cleaner 55 has been described as an example of the device disposed upstream of the air filter 50 in the air flow direction, but is not limited to this form. For example, the configuration of the present embodiment can be similarly applied to a configuration in which a radiator sub tank, a counter weight, a battery, and the like are disposed upstream of the air filter 50 in the air flow direction as other devices.

  As described above, the present invention provides a highly practical effect that the air filter and the device are arranged in a limited space and a sufficient work space for attaching and detaching the air filter can be secured. Therefore, it is extremely useful and has high industrial applicability.

DESCRIPTION OF SYMBOLS 10 Construction machine 11 Lower traveling body 15 Machine room 16 Machine room cover 20 Upper turning body 33 Radiator 40 Intake duct 42 Air filter attachment part 45 Lock member 50 Air filter 55 Air cleaner (equipment)
56 Equipment mounting part S Work space

Claims (2)

A construction machine comprising a lower traveling body, an upper swing body mounted on the lower traveling body, and a machine room cover covering a machine room provided on the upper swing body,
A radiator disposed in the machine room such that the core surface faces the left-right direction of the vehicle;
An intake duct disposed upstream of the radiator in the air flow direction;
An air filter that is detachably attached to the intake duct with a filter surface facing the core surface of the radiator;
A device disposed upstream of the air filter in the air flow direction,
The intake duct has an air filter mounting portion for mounting the air filter, and a device mounting portion that is formed integrally with the air filter mounting portion and mounts the device.
The air filter mounting portion has a pair of guide plates respectively disposed along the upper and lower surfaces of the air filter,
The air filter is accommodated between the pair of guide plates and attached to the intake duct so that the filter surface is inclined toward the radiator side toward the rear of the vehicle. A construction machine comprising a work space for attaching and detaching the air filter. In claim 1,
A construction machine comprising a lock member that contacts the side wall of the air filter on the vehicle rear side and fixes the air filter.

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