JP5722196B2 - Construction machinery filter equipment - Google Patents

Description

  The present invention relates to a filter device for a construction machine, and more particularly to a filter device for a construction machine that requires maintenance on the filter.

  Generally, a construction machine such as a hydraulic excavator has a heat exchange device for cooling the engine. This heat exchange device is cooled by cooling air generated by a cooling fan driven by an engine. In addition, a filter is provided on the cooling air suction side of the heat exchange device to prevent clogging of the cooling fins provided in the heat exchange device with dust or the like.

  Moreover, the heat exchange device has a configuration in which a plurality of heat exchangers such as a radiator, an oil cooler, an intercooler, a fuel cooler, and a condenser are arranged in parallel. In the configuration in which the filter is provided in each individual heat exchanger, it becomes necessary to perform maintenance on each filter when clogging occurs, and the processing becomes troublesome.

  For this reason, for example, as shown in FIG. 5, in the heat exchange device 104 in which a plurality of heat exchangers 104a and 104b are arranged in parallel, the most upstream side of the cooling air flow direction (hereinafter, this direction is referred to as the front side). One filter 105 is arranged on the further upstream side of the arranged heat exchanger 104a.

  Conventionally, as a structure in which the filter 105 is disposed in front of the heat exchange device 104, a support frame 110 is provided so as to surround the top, bottom, left, and right of the heat exchange device 104, and the filter 105 is attached to the front surface (the surface upstream of the cooling air). (Patent document 1).

JP 2006-052689 A

However, in the conventional filter device 100 shown in FIG. 5, the entire structure including the lower portion of the heat exchange device 104 is covered with the support frame 110, and the filter 105 is disposed at a position facing the heat exchange device 104 of the support frame 110. It was said. For this reason, the support frame 110 inevitably has a structure protruding forward from the heat exchange device 104 (this protrusion amount is indicated by an arrow L _O in FIG. 5).

  In recent years, with the increase in functionality of construction machines, the number of devices mounted in the engine room 101 tends to increase. However, in the conventional structure in which the support frame 110 protrudes in front of the heat exchange device 104, the mounted device (for example, the electrical component 108, the battery 109, etc.) does not interfere with the support frame 110 with respect to the heat exchange device 104. Therefore, it is necessary to greatly separate the mounted equipment.

In the example shown in FIG. 5, it is necessary to dispose the mounted device with respect to the heat exchange device 104 at a distance greater than or equal to the distance indicated by the arrow L _O in the drawing. For this reason, the conventional filter device 100 has a problem that the engine chamber 101 cannot be effectively used and the engine chamber 101 becomes large.

  Further, in the conventional configuration, there is a problem that dust attached to the filter 105 may drop and adhere to the mounted device, and the work of removing the dust from the mounted device is troublesome.

  The present invention has been made in view of the above points, and an object of the present invention is to provide a construction machine filter device capable of effectively utilizing the space in the engine room.

From the first point of view, the above problem is
A filter that covers a cooling air upstream side of a heat exchange device that includes a first heat exchanger that is cooled by cooling air and a second heat exchanger that is disposed on the cooling air upstream side of the first heat exchanger. When,
Extending from the frame holding the first heat exchanger to the upstream side of the cooling air, covering the upper and both sides of the second heat exchanger and being hermetically fixed to the frame, A support frame for supporting the filter on the upstream side;
A partition that defines an engine room into a first space part into which the cooling air flows and a second space part in which the heat exchange device is disposed;
The partition is
The first frame is provided in the support frame, is provided to be parallel to the cooling air intake surface of the second heat exchanger, and has a first opening in which the filter is mounted. The wall,
A second wall portion extending from the lower portion of the first wall portion toward the upstream side of the cooling air;
A space constituting a part of the second space portion is provided at a lower portion of the second wall portion,
The second wall portion is
A construction machine comprising: a second opening that communicates the first space and a space that constitutes a part of the second space; and a lid that covers the second opening. it can be more resolved in the filter device.

  According to the disclosed filter device for a construction machine, a part of the second space portion is formed below the second wall portion constituting the partition. Therefore, when mounting equipment is mounted in the engine compartment, the second space By disposing the mounted device in a part of the section, the mounted device can be disposed close to the heat exchange device, thereby making it possible to effectively use the space in the engine room.

FIG. 1 is a side view showing a construction machine equipped with a filter device according to a first embodiment of the present invention. FIG. 2 is a cross-sectional view of the engine compartment in which the filter device according to the first embodiment of the present invention is mounted. FIG. 3 is a perspective view showing the filter device according to the first embodiment of the present invention. FIG. 4 is a cross-sectional view of an engine compartment equipped with a filter device according to a second embodiment of the present invention. FIG. 5 is a cross-sectional view for explaining a conventional filter device.

  Next, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 shows a construction machine provided with a filter device according to a first embodiment of the present invention. In the present embodiment, a small swing type small hydraulic excavator 1 will be described as an example of a construction machine. In this small turning type small hydraulic excavator 1, the amount of extension of the engine chamber 17 in the Y2 direction with respect to the cab 8 is set small.

  The small hydraulic excavator 1 includes a crawler type lower traveling body 2 that can be self-propelled, and an upper revolving body 3 that is turnably mounted on the lower traveling body 2. A work attachment 4 is provided on the front side of the upper swing body 3.

  The work attachment 4 includes a boom 6, an arm 9, a bucket 10, and the like. The boom 6 is attached to a turning frame 5 described later so as to be able to move up and down. The arm 9 is rotatably attached to the tip end side of the boom 6. Moreover, the bucket 10 is attached to the front end side of the arm 9 so that rotation is possible.

  The boom cylinder 12 is disposed between the turning frame 5 and the lower boom 6. The boom 6 moves up and down with respect to the revolving frame 5 by the boom cylinder 12. The arm cylinder 13 is disposed between the boom 6 and the arm 9. The arm 9 rotates with respect to the boom 6 by the arm cylinder 13. Further, the bucket cylinder 14 is disposed between the bucket 10 and the arm 9. The bucket 10 is rotated with respect to the arm 9 by the bucket cylinder 14.

  The upper revolving unit 3 is installed on the lower traveling unit 2 through a revolving mechanism 16 so as to be able to revolve. As shown in FIG. 2 in addition to FIG. 1, the upper swing body 3 is provided with a swing frame 5, a cab 8, a counterweight 15, an engine hood 17a, an exterior cover 18, an engine 20, a muffler 30, and the like. .

  The cab 8 is provided on the revolving frame 5, and a driver's seat (not shown) is provided therein. The operator sits on the driver's seat in the cab 8 and operates the small hydraulic excavator 1.

  The counterweight 15 has a function of balancing the weight with the work attachment 4. The engine hood 17a and the exterior cover 18 cover the engine 20, the heat exchanger 24, the pump 27, the filter device 35A, and the like.

  Next, the configuration inside the engine chamber 17 will be described.

  The engine chamber 17 is surrounded by a counterweight 15 (see FIG. 1), an engine hood 17a, and an exterior cover 18. FIG. 2 is a diagram showing an internal configuration of the engine chamber 17. As shown in the figure, an engine 20, a cooling fan 23, a heat exchange device 24, a pump 27, a filter device 35A, and the like are arranged in the engine chamber 17.

  The engine 20 is supported on an upper part of an engine mounting seat 21 disposed on the revolving frame 5 via a mount 22. The mount 22 is an anti-vibration mount and prevents vibration generated by the engine 20 from being transmitted to the turning frame 5.

  A cooling fan 23 is disposed on the X1 direction side (left side in the figure) of the engine 20. Further, a heat exchange device 24 is disposed on the X1 direction side of the cooling fan 23.

  The cooling fan 23 is rotationally driven by the engine 20. When the cooling fan 23 is driven to rotate, outside air is taken in as cooling air from the intake 51 formed in the exterior cover 18 into the first space 55 in the engine chamber 17.

  The cooling air generated by the cooling fan 23 passes through only the filter device 35A and the heat exchange device 24 and flows from the first space portion 55 toward the second space portion 56 as will be described later. The heat exchange device 24 is cooled by this cooling air. Thus, the cooling air flows toward the right side in FIG. Therefore, the arrow X1 direction side in the figure is the cooling air upstream side, and the arrow X2 direction in the figure is the cooling air downstream side.

  The heat exchange device 24 includes a radiator unit 24A (first heat exchanger), a fuel cooler 24B (second heat exchanger), an air conditioner condenser 24C (second heat exchanger), a frame body 24D, and the like. It is configured.

  The radiator unit 24A is an oil cooler for cooling hydraulic fluid such as a radiator that cools cooling water flowing in the engine 20, a boom cylinder 12, an arm cylinder 13 and a bucket cylinder 14, and an excess oil supplied to the engine. An intercooler for cooling the supply air is arranged in parallel.

  The fuel cooler 24B cools the surplus fuel returning to a fuel tank (not shown), and the condenser 24C is provided for an air conditioner. The frame body 24D is disposed so as to surround the radiator unit 24A, and has a function of holding the radiator unit 24A.

  The fuel cooler 24B and the condenser 24C are disposed on the cooling air upstream side of the radiator unit 24A and supported by the frame body 24D. Further, the frame body 24D has an opening 24E to which the filter device 35A is connected on the upstream side of the cooling air of the radiator unit 24A. Further, a seal member 50 is provided on the upper portion of the frame body 24D to seal between the engine hood 17a and the heat exchange device 24 when the engine hood 17a is attached to the exterior cover 18.

  The second space 56 is defined by the frame 24D and the seal member 50 into a first section 56A in which the engine 20 is disposed and a second section 56B in which the fuel cooler 24B and the condenser 24C are disposed. As a result, the cooling air that has flowed into the second section 56B passes exclusively through the heat exchange device 24 and flows into the first section 56A.

  The pump 27 is disposed on the side opposite to the side where the cooling fan 23 of the engine 20 is disposed (downstream side of cooling air). The pump 27 is a hydraulic source such as a boom cylinder 12, an arm cylinder 13, and a bucket cylinder 14 that drive the work attachment 4. This pump 27 is also driven by the engine 20.

  Exhaust gas discharged from the engine 20 is introduced into the muffler 30 via the exhaust manifold 28 and the exhaust pipe 29. The muffler 30 is fixed to the upper position of the engine 20 on the X2 direction side via a fixing bracket 33. Exhaust noise of exhaust gas is silenced by repeatedly expanding and compressing in a plurality of spaces formed in the muffler 30.

  A tail pipe 31 is provided at the exhaust end of the silencer 30. The exhaust gas that has been silenced by the silencer 30 is discharged from the tail pipe 31 to the outside of the machine body.

  Next, the filter device 35A will be described with reference to FIG. 3 in addition to FIG.

  The filter device 35 </ b> A is disposed upstream of the cooling air with respect to the opening 24 </ b> E of the heat exchange device 24. The filter device 35 </ b> A is configured to include a filter 36 and a filter support frame 46.

  The filter 36 is disposed so as to face the fuel cooler 24B and the condenser 24C disposed on the cooling air upstream side of the heat exchange device 24. The filter 36 removes dust so that the dust flowing from the intake port 51 together with the cooling air is not sucked into the heat exchange device 24.

  The filter support frame 46 has a frame shape with the lower side removed. That is, the filter support frame 46 includes an upper piece 46a and left and right side pieces 46b and 46c, and is disposed so as to surround the fuel cooler 24B and the condenser 24C. Therefore, a lower opening 47 is formed on the lower side of the filter support frame 46 (the arrow Z2 side in the figure).

  The filter support frame 46 has a first wall portion 41A that faces the cooling air intake surfaces of the fuel cooler 24B and the condenser 24C substantially in parallel, and the first wall portion 41A has a first wall 36A to which the filter 36 is attached. One opening 43A is formed. When the filter 36 is attached to the first opening 43A, the filter 36 faces the heat exchange device 24 (specifically, the cooling air intake surface of the fuel cooler 24B and the condenser 24C) substantially in parallel. .

  In the present embodiment, the cooling air intake surfaces of the fuel cooler 24B and the condenser 24C and the first wall portion 41A face each other substantially in parallel. However, the first wall portion is not necessarily strictly parallel to the first wall portion. 41A may be inclined at an arbitrary angle with respect to the cooling air intake surfaces of the fuel cooler 24B and the condenser 24C.

  Thus, the filter support frame 46 supports the filter 36 at a position facing the fuel cooler 24B and the condenser 24C, and the first space 55 into which the cooling air flows, the fuel cooler 24B, and the condenser 24C are disposed. The function which defines the 2nd division 56B of the 2nd space part 56 to be performed is shown.

  The filter support frame 46 is attached to the heat exchange device 24 via an upper piece 46a and left and right side pieces 46b and 46c. The upper piece 46 a and the left and right side pieces 46 b and 46 c of the filter support frame 46 are airtightly fixed to the frame body 24 </ b> D of the heat exchange device 24.

  The filter support frame 46 is formed so as to extend in a direction substantially perpendicular to the first wall portion 41A and from the first wall portion 41A toward the cooling air upstream side (in the direction of arrow X1 in the figure). A lower piece 46d is provided. Therefore, the first wall portion 41A and the lower piece 46d have a substantially L-shape as shown in FIG.

  On the floor surface 59 below the lower piece 46d of the filter support frame 46, mounted devices such as a battery 52 and an electrical component 53 are mounted.

  A frame 45 is provided around the battery 52 and the electrical component 53 at the same height as the lower piece 46d of the filter support frame 46. A second opening 44 is formed by the frame body 45 and the lower piece 46d. Therefore, maintenance for the battery 52, the electrical component 53, and the like is performed through the second opening 44.

  A space (third section 56C) in which the battery 52, the electrical component 53, and the like are disposed communicates with the second section 56B of the second space section 56 through the lower opening 47 of the filter support frame 46, and the second space section. Make a part of 56.

As shown in FIG. 3, the frame body 45 has a tray 3 attached to the second opening 44.
7 is supported.

  The frame body 45 includes a horizontal frame body 45B, a deck portion 60, and the like. The horizontal frame body 45B is disposed at both side positions (Y1 direction position and Y2 direction position) in the second opening 44. Each horizontal frame body 45B is fixed to the floor surface 59 by, for example, a support member provided on the floor surface 59 (not shown).

  In the present embodiment, an edge portion of the deck portion 60 that constitutes a part of the exterior cover 18 that faces the second opening 44 is also a part of the frame body 45. In the present embodiment, since a part of the deck portion 60 constituting the engine chamber 17 is used as the frame body 45 in this way, the number of parts can be reduced. Further, since the lower piece 46 d of the filter support frame 46 is used as a support member for the tray 37 that cooperates with the frame body 45, a seal member between the filter support frame 46 and the frame body 45 can be omitted. Although the advantage of omitting the seal member is lost, a support member may be provided on the frame body 45 side without providing the lower piece 46d on the filter support frame 46.

  As described above, the frame body 45 is formed in the second opening 44. When the tray 37 is mounted in the second opening 44, the tray 37 is supported by the lower piece 46d of the filter support frame 46 and the frame body 45 through seal members (not shown) on the outer periphery. . For this reason, the tray 37 is attached to the second opening 44 in a reliable and stable state by the lower piece 46 d of the filter support frame 46 and the frame body 45.

The tray 37 hermetically seals the second opening 44 in the attached state, whereby the first space 55 and the third section 56C of the second space 56 are defined. That is, the second wall portion 42 is configured by the lower piece 46 d of the filter support frame 46, the frame body 45, and the tray 37. Therefore, the cooling air that has flowed into the first space portion 55 via the intake port 51 does not pass through the second opening portion 44, and the first opening portion 43A formed exclusively in the first wall portion 41A. It passes through (filter 36) and flows into the second section 56B of the second space 56.

  Therefore, in the present embodiment, the filter support frame 46 (first wall portion 41A) and the second wall portion 42 allow the first space portion 55 and the second space portion 56 (first section 56A to third section 56C) to be connected. The partition 40A that defines the above is configured.

  A door 19 is disposed at a position of the exterior cover 18 facing the filter device 35A. The tray 37 can be taken out from the door 19 through the door 19.

  Note that the tray 37 has a shape that covers the bottom of the first space portion 55 widely, and thus has a function of collecting dust falling from the filter 36. In the present embodiment, the tray 37 is formed of a metal material. However, the tray 37 may be formed of an elastic material such as a synthetic resin so that the tray 37 itself has a function such as a seal.

  In the filter device 35 </ b> A configured as described above, the interior of the engine chamber 17 is divided into the second space 55 and the second space 56 by the filter support frame 46 (first wall portion 41 </ b> A) and the second wall portion 42. 56B and the third section 56C. At this time, as described above, the lower piece 46d of the filter support frame 46 extends through the frame 45 and the tray 37 toward the upstream side of the cooling air and is connected to the exterior cover 18 (deck portion 60). The second wall portion 42 is configured.

  Therefore, unlike the conventional configuration in which the support portion that supports the filter completely covers the upstream side of the cooling air including the lower position of the heat exchange device, the third section 56C at the lower position of the first space 55 is the second space. A part of the portion 56 is configured. The third section 56C communicates with the second section 56B of the second space 56 through the lower opening 47 of the filter support frame 46. Therefore, the filter support frame 46 does not exist at the lower position on the upstream side of the cooling air of the heat exchange device 24. For this reason, when mounting the battery 52, the electrical component 53, etc. in the third section 56C, the battery 52, the electrical component 53, etc. can be mounted close to the heat exchange device 24.

  Specifically, according to the filter device 35 </ b> A according to the present embodiment, the battery 52, the electrical component 53, and the like can be disposed at the lower position of the filter support frame 46 that supports the filter 36. Thereby, it is possible to prevent a so-called dead space (useless space) from being generated in the lower portion of the filter support frame 46 as in the related art, and the space in the engine chamber 17 can be effectively utilized.

  The tray 37 is mounted on the deck portion 60 on the upstream side of the cooling air of the filter 36. For this reason, when the dust adhering to the filter 36 falls due to vibration of the engine 20 or the like, it can be collected by the tray 37.

  In the filter device 35 </ b> A according to the present embodiment, the cleaning process for the filter 36 can be performed in the first space 55. That is, dust attached to the filter 36 in the first space 55 is dropped on the tray 37, and then the tray 37 is taken out of the first space 55 through the door 19 to remove the dust. Is possible. Thereby, while facilitating the cleaning process of the filter 36, it can suppress that dust scatters at the time of cleaning.

  Next, the filter apparatus which is 2nd Embodiment of this invention is demonstrated.

  FIG. 4 is a cross-sectional view of the engine chamber 17 on which the filter device 35B according to the second embodiment of the present invention is mounted. In FIG. 4, components corresponding to those of the filter device 35 </ b> A according to the first embodiment described with reference to FIGS. 1 to 3 are denoted by the same reference numerals, and description thereof is omitted.

  In the filter device 35A according to the first embodiment described above, the first wall portion 41A is configured to be supported by the heat exchange device 24 via the filter support frame 46. Further, a part of the second wall portion 42 is constituted by the lower piece 46 d of the filter support frame 46. In contrast, in the filter device 35B according to the present embodiment, the first wall portion 41B constituting the partition 40B is configured integrally with the exterior cover 18 (wall portion) of the engine chamber 17, and the second wall. The frame 45 constituting the portion 42 is provided with a vertical frame 45A in contact with the lower end of the first wall 41B.

  In the present embodiment, the first wall portion 41B is formed by forming the exterior cover 18 so as to extend vertically downward (Z2 direction) at the opening forming position where the engine hood 17a is mounted.

  Thus, by using a part of the exterior cover 18 as the partition 40B (first wall portion 41B), the number of parts of the filter device 35B can be reduced and the structure can be simplified. Specifically, in the first embodiment, the first wall portion 41 </ b> A of the filter support frame 46 is supported by the frame body 24 </ b> D of the heat exchange device 24 and at the same time the second space 56 </ b> B of the first space portion 55 and the second space portion 56. The upper piece 46a and the left and right side pieces 46b and 46c are necessary to define the above. In this embodiment, the upper piece 46a and the left and right side pieces 46b and 46c of the filter support frame 46 are used. A configuration can be eliminated.

  Further, since the configuration such as the upper piece 46a of the filter support frame 46 and the left and right side pieces 46b, 46c can be eliminated, there is no protrusion of the heat exchange device 24 toward the upstream side of the cooling air, and no Mounted devices such as the battery 52 and the electrical component 53 arranged in the three sections 56C can be further brought closer to the heat exchange device 24. Therefore, according to the filter device 35B according to the present embodiment, the space in the engine compartment 17 can be further effectively used.

  The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific embodiments described above, and various modifications are possible within the scope of the gist of the present invention described in the claims. It can be modified and changed.

  Specifically, in the above-described embodiment, the example in which the present invention is applied to the small excavator 1 has been described. However, the present invention can also be applied to various construction machines having a filter.

DESCRIPTION OF SYMBOLS 1 Small hydraulic excavator 5 Swing frame 15 Counterweight 17 Engine chamber 17a Engine hood 18 Exterior cover 19 Door 20 Engine 23 Cooling fan 24 Heat exchange device 24A Radiator unit (first heat exchanger)
24B Fuel cooler (second heat exchanger)
24C condenser (second heat exchanger)
24D Frame 30 Silencer 35A, 35B Filter device 36 Filter 37 Tray 40A, 40B Partition 41A, 41B First wall 42 Second wall 43A, 43B First opening 44 Second opening 45 Frame 46 Filter support frame 50 Seal member 51 Inlet port 52 Battery 53 Electrical component 55 First space portion 56 Second space portion 56A First section 56B Second section 56C Third section 60 Deck section

Claims (2)

A filter that covers a cooling air upstream side of a heat exchange device that includes a first heat exchanger that is cooled by cooling air and a second heat exchanger that is disposed on the cooling air upstream side of the first heat exchanger. When,
Extending from the frame holding the first heat exchanger to the upstream side of the cooling air, covering the upper and both sides of the second heat exchanger and being hermetically fixed to the frame, A support frame for supporting the filter on the upstream side;
A partition that defines an engine room into a first space part into which the cooling air flows and a second space part in which the heat exchange device is disposed;
The partition is
The first frame is provided in the support frame, is provided to be parallel to the cooling air intake surface of the second heat exchanger, and has a first opening in which the filter is mounted. The wall,
A second wall portion extending from the lower portion of the first wall portion toward the upstream side of the cooling air;
A space constituting a part of the second space portion is provided at a lower portion of the second wall portion,
The second wall portion is
A construction machine comprising: a second opening that communicates the first space and a space that constitutes a part of the second space; and a lid that covers the second opening. Filter device. 2. The construction machine filter device according to claim 1 , wherein the mounted device mounted in the engine room is disposed at a position facing the second opening in the second space.

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