JP2008168780A - Engine room for construction machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce dust or other foreign matter to be sucked into an engine room in carrying out inspection work inside the engine room as the engine is driven. <P>SOLUTION: In the engine room 10, a cooling fan 25 is disposed upstream of the engine 23, and a heat exchanger unit 31 is disposed upstream of a cooling fan 25. Between the heat exchanger unit 31 and the cooling fan 25, a shroud chamber 35 is formed, and a single layer of upper surface cover 16 is provided, in such a way that the upper surface cover 16 also serves as an upper wall. The upper surface cover 16 is composed to include a first cover 16A opening/closing the engine 23 upward and a second cover 16B provided separately from the first cover 16A to open/close an upper part of the chamber 35. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an engine room of a construction machine that is provided in a construction machine such as a hydraulic excavator and has a shroud chamber formed between a heat exchanger unit and a cooling fan and a single upper cover.

  There exists a thing shown by patent document 1 as this kind of prior art. This prior art is an engine room provided in a construction machine such as a hydraulic excavator. In the engine room, an engine, a cooling fan provided adjacent to the upstream side of the engine, and an upstream side of the cooling fan are provided. The heat exchanger unit is arranged. The heat exchanger unit includes a radiator, an oil cooler, and an intercooler. The space between the cooling fan and the heat exchanger unit forms a shroud chamber.

Further, the single upper surface cover that forms the upper part of the engine room also serves as the upper wall of the engine room, and is above the engine room, above the cooling fan, above the shroud room, and the heat exchanger unit. And an upper region including the upper part of the air inflow chamber forming the upstream side of the heat exchanger unit can be opened and closed as necessary.
JP 2006-44558 A

  In the conventional technology described above, for example, when the engine compartment is opened with the upper cover of the engine compartment opened and the engine compartment is inspected, the cooling fan rotates as the engine is driven. Therefore, foreign matters such as dust and dust outside the engine chamber are easily sucked into the engine chamber through the shroud chamber by the rotation of the cooling fan. When foreign matters such as dust and dust are sucked in, such foreign matters may adhere to the heat exchanger unit and the like, and there is a concern that the frequency of cleaning work increases.

  The present invention has been made from the above-described prior art, and its purpose is to suck in foreign matter such as dust and dirt into the engine compartment when the engine compartment is inspected while the engine is driven. The object is to provide an engine room of a construction machine that can reduce the amount of heat.

  In order to achieve the above object, according to the present invention, a cooling fan is disposed on the upstream side of an engine, a heat exchanger unit is disposed on the upstream side of the cooling fan, and a space between the heat exchanger unit and the cooling fan is provided. A shroud chamber is formed, and an upper surface cover made of a single layer is provided, and in the engine room of the construction machine where the upper surface cover also serves as an upper wall, the upper surface cover is capable of opening and closing the upper side of the engine; The second cover is provided independently of the first cover and includes a second cover capable of opening and closing the upper portion of the shroud chamber.

  In the present invention configured as described above, when the inspection operation in the engine compartment is performed with the engine being driven, it is only necessary to open the first cover that forms the upper surface cover and perform the inspection operation. At this time, since the shroud chamber is closed by the second cover, the cooling fan is driven as the engine is driven, but foreign matters such as dust and dust outside the engine chamber are sucked into the engine chamber through the shroud chamber. It will not be. That is, inhalation of foreign matter such as dust and dust into the engine compartment can be suppressed to a small extent, and such foreign matter can be prevented from adhering to the heat exchanger unit or the like. Further, when carrying out such an inspection operation in the engine compartment, it is possible to perform the inspection operation by opening only the first cover as described above, so the weight load associated with opening and closing the cover is light and the first cover can be easily Can be opened and closed.

  When cleaning the heat exchanger unit or the like, the second cover that forms the upper surface cover is opened, and for example, a cleaning nozzle connected to an air compressor is inserted into the shroud chamber, thereby Cleaning can be easily performed. In such cleaning, since only the second cover can be opened for cleaning, the weight load associated with opening and closing the cover is light and the second cover can be easily opened and closed. Can be easily performed.

  In addition, the present invention is characterized in that in the above invention, a frame for fixing the second cover is provided, and a bolt for fixing the second cover to the frame is provided.

  Further, the present invention is characterized in that, in the above-mentioned invention, a frame for fixing the second cover is provided, and a hinge portion for rotatably mounting the second cover to the frame is provided.

  Further, the present invention is the above invention, wherein the second cover is independent of the first divided portion and the first divided portion capable of opening and closing above the air inflow chamber forming the upstream side of the heat exchanger unit. And a second divided part capable of opening and closing above the shroud chamber.

  Further, the present invention is characterized in that, in the above-mentioned invention, a hinge portion for rotatably mounting the first cover is provided.

  Further, the present invention is the above invention, further comprising a bottom cover capable of opening and closing a lower portion of the air inflow chamber forming the upstream side of the heat exchanger unit, and the foreign matter that has flowed into the air inflow chamber in the air inflow chamber. Is provided with a foldable guide body that is discharged from the opening below the air inflow chamber formed when the bottom cover is opened.

  In the present invention, the upper cover includes a first cover that can be opened and closed above the engine, and a second cover that can be opened and closed above the shroud chamber, so that the engine chamber can be checked while the engine is driven. In carrying out the inspection, only the first cover can be opened for inspection work, and at this time, the shroud chamber can be kept closed by the second cover. As a result, inhalation of foreign matter such as dust and dirt into the engine compartment can be suppressed to a small extent, and such foreign matter can be prevented from adhering to the heat exchanger unit and the like, and the frequency of cleaning work is reduced compared to the conventional case. be able to.

  In addition, since it is possible to perform inspection work by opening only the first cover during such inspection work, the weight load associated with opening and closing the cover can be made lighter than before, which makes it easy to remove the first cover. It can be opened and closed, contributing to improving the efficiency of inspection work.

  Further, when cleaning the heat exchanger unit or the like, by opening the second cover, a cleaning tool can be inserted into the shroud chamber, the cleaning work can be easily performed, and the efficiency of the cleaning work is improved as compared with the conventional case. Since only the second cover can be opened for cleaning, the weight load associated with the opening and closing of the cover can be reduced as compared with the prior art, which facilitates the cleaning work. Efficiency can be improved compared to the conventional case.

  The best mode for carrying out an engine room of a construction machine according to the present invention will be described below with reference to the drawings.

  FIG. 1 is a side view showing a hydraulic excavator cited as an example of a construction machine provided with an embodiment of an engine room according to the present invention.

  A hydraulic excavator provided with an embodiment of an engine room according to the present invention is attached to a traveling body 1, a revolving body 2 disposed on the traveling body 1, and the revolving body 2 so as to be vertically rotatable. A front work machine 3 is provided.

  The front work machine 3 includes a boom 4 that is rotatably attached to the revolving structure 2, an arm 5 that is rotatably attached to the tip of the boom 4, and a bucket 6 that is rotatably attached to the tip of the arm 5. Including. Further, hydraulic actuators such as a boom cylinder 7 that drives the boom 4, an arm cylinder 8 that drives the arm 5, and a bucket cylinder 9 that drives the bucket 6 are included.

  On the swivel body 2, a cab 2 a is disposed at the front portion, and a counterweight 11 that maintains a weight balance is disposed at the rear portion. Between the cab 2a and the counterweight 11, an engine room 10 which is an embodiment of the present invention is disposed.

  2 and 3 are views showing a main part of an embodiment of the engine chamber of the present invention provided in the hydraulic excavator shown in FIG. 1, FIG. 2 is a plan view, and FIG. 3 is a side sectional view. FIG. 4 is a front view showing a heat exchanger unit provided in one embodiment of the engine room according to the present invention, and FIG. 5 is a perspective view showing a guide body provided in one embodiment of the engine room according to the present invention. FIG. 6 is a side sectional view showing a main part in a state where the upper surface cover is opened in one embodiment of the engine room according to the present invention.

  The outer shell of the engine compartment 10 includes a front cover 12, a rear cover 13, side covers 14, 15 shown in FIG. 2, bottom covers 17, 18, 19, 20, 21, 22 shown in FIG. The cover 16 is formed. The bottom covers 17 to 22 are respectively fixed to the revolving frame 50. In particular, the bottom covers 18 and 19 can be easily opened and closed.

  As shown in FIGS. 2 and 3, an engine 23 and a hydraulic pump 24 are arranged in the engine chamber 10. The rear cover 13 in the vicinity of the hydraulic pump 24 is formed with an opening 13a through which the air in the engine chamber 10 can be discharged to the outside. A cooling fan 25 held by the engine 23 is disposed on the upstream side of the engine 23 in the vicinity of the engine 23. The rotation of the crank pulley 27 driven along with the driving of the engine 23 is transmitted to the cooling fan 25 via the belts 28A and 28B, and the cooling fan 25 is rotated.

  A heat exchanger unit 31 is arranged on the upstream side of the cooling fan 25. The heat exchanger unit 31 includes a radiator 31a, an oil cooler 31b, and an intercooler 31c arranged in parallel to each other in a direction orthogonal to the air inflow direction. An air inflow chamber 36 is formed on the upstream side of the heat exchanger unit 31. The front cover 12 is formed with openings 12 a and 12 b that guide air to the air inflow chamber 36.

  As shown in FIG. 3, a shroud 29 is formed around the cooling fan 25 to form a through hole 29 a slightly larger than the outer diameter of the cooling fan 25. The upper portion of the shroud 29 is fixedly held by the frames 30a and 30b. The cooling fan 25 is rotatably held as described above while maintaining a gap called the chip clearance and the through hole 29A. A protective net 51 is attached to a position near the downstream side of the cooling fan 25. The space between the cooling fan 25 and the heat exchanger unit 31 described above forms a shroud chamber 35 that guides the air flow to the cooling fan 25.

  The upper surface cover 16 that forms the upper portion of the engine chamber 10 is a single cover, and the upper surface cover 16 also serves as the upper wall of the engine chamber 10. In the present embodiment, as shown in FIG. 3, the upper cover 16 is provided independently of the first cover 16 </ b> A capable of opening and closing the upper portion of the engine 23, and the upper portion of the shroud chamber 31. And a second cover 16B capable of opening and closing an upper region including the upper part of the air inflow chamber 36, and a third cover 16C connected to the front cover 12 and fixedly held.

  As shown in FIG. 3, the first cover 16 </ b> A described above is rotatably provided by a hinge portion 37 disposed on the rear cover 13 side, and has openings 16 </ b> A <b> 1 and 16 </ b> A <b> 2 that can discharge air in the engine compartment 10. Have. Further, a hook portion 38 is provided at an end located on the opposite side of the hinge portion 37. The hook portion 38 can be engaged with and disengaged from a locking portion 39 attached to one frame 30b for fixing and holding the shroud 29 shown in FIG.

  The above-described second cover 16B is connected to a frame 30c fixed to the third cover 16C, for example, with a bolt 40a, and connected to the other frame 30a, which fixes the above-described shroud 29, with a bolt 40b.

  3 and 4, the heat exchanger unit 31 described above is erected and fixed to the revolving frame 50 and supported by a support plate 32. The upper part of the heat exchanger unit 31, that is, the part close to the support plate 32 is shielded by the plate 33 as shown in FIG. The radiator 31a, the oil cooler 31b, and the intercooler 31c that form the heat exchanger unit 31 and the gaps between these and the side covers 14, 15 and the like are sealed with a seal member.

  Further, in the present embodiment, as shown in FIGS. 3 and 6, foreign matters such as dust and dust flowing into the air inflow chamber 36 are formed in the air inflow chamber 36 when the bottom cover 18 is opened. The folding guide body 52 is provided to be discharged from the opening 36b.

  As shown in FIGS. 5 and 6, the guide body 52 includes a shaft portion 52a fixed to the front cover 12, a first flat plate portion 52c connected to the shaft portion 52a, and the first flat plate portion 52c. And a second flat plate portion 52d that is connected to the shaft portion 52b and can be suspended in the direction of the opening 36b described above. In the folded state, as shown in FIG. 5, the front cover 12 is detachably held by the fasteners 53a and 53b.

  In the present embodiment configured as described above, for example, when the inspection work in the engine compartment 10 is performed in a state where the engine 23 is driven, the second cover 16B forming the upper surface cover 16 is not opened, and the first cover Only 16A needs to be opened. That is, as illustrated in FIG. 6, the first cover 16 </ b> A may be rotated upward about the hinge portion 37 by releasing the engagement between the hook portion 38 and the locking portion 39. Thereby, the upper part of the engine 23 is opened, and the inspection work of the equipment in the engine compartment 10 can be performed while visually confirming the driving state of the engine 23.

  Further, for example, when cleaning the heat exchanger unit 31 or the like, the bolts 40a and 40b fixing the second cover 16B are removed without opening the first cover 16A, and only the second cover 16B is opened. That's fine. Moreover, what is necessary is just to open the bottom covers 18 and 19 so that it may illustrate in FIG. Furthermore, the fasteners 53A and 53B may be loosened to deploy the guide body 52, and the first flat plate portion 52c and the second flat plate portion 52d may be suspended. Accordingly, as illustrated in FIG. 6, the upper part of the shroud chamber 35, the upper part of the heat exchanger unit 31, and the upper part of the air inflow chamber 36 are opened, and an opening is formed between the frame 30 a and the heat exchanger unit 31. 35a is formed, and an opening 36a is formed between the heat exchanger unit 31 and the third cover 16C.

  Therefore, for example, a cleaning nozzle of an air compressor (not shown) is inserted into the shroud chamber 35 from the opening 35 a above the shroud chamber 35, and cleaning from the back side of the heat exchanger unit 31 is performed while visually confirming. be able to. By this cleaning, foreign matter adhering to the cores and fins of the heat exchanger unit 31 can be discharged to the outside from the opening 35 b below the shroud chamber 35. In addition, the above-described air compressor cleaning nozzle is inserted into the air inflow chamber 36 through the opening 36a above the air inflow chamber 36, so that cleaning from the front side of the heat exchanger unit 31 is performed while visually checking. can do. By this cleaning, foreign matter adhering to the heat exchanger unit 31 can be discharged to the outside through the guide body 52 from the opening 36 b below the air inflow chamber 36. After completion of the cleaning operation, as shown in FIG. 3, the guide body 52 is folded and fixed to the front cover 12 by the fasteners 53a and 53b, and the second cover 16B is secured to the frames 30c and 30a by the bolts 40a and 40b, respectively. And the bottom covers 18 and 19 are closed.

  According to the present embodiment configured as described above, the upper surface cover 16 that forms the upper part of the outer shell of the engine chamber 10 can open and close the first cover 16A that can open and close the engine 23 and the shroud chamber 35. Since the second cover 16B is included, when the inspection operation in the engine chamber 10 is performed with the engine 23 driven, only the first cover 16A can be opened and the inspection operation can be performed. Sometimes the shroud chamber 35 can be kept closed by the second cover 16B. As a result, the inhalation of foreign matter such as dust and dirt into the engine compartment 10 can be suppressed to a small extent, and such foreign matter can be prevented from adhering to the heat exchanger unit 31 and the like, and the frequency of cleaning work can be reduced. Can do.

  In addition, since the second cover 16B is closed during such an inspection operation, the inspection tool or the like may fall into the shroud chamber 35 or may fall on the cooling fan 25 and damage the cooling fan 25. Can be prevented. Further, when carrying out such an inspection operation in the engine compartment 10, it is possible to perform the inspection operation by opening only the first cover 16A as described above, so that the weight load associated with opening and closing the cover can be reduced. Thus, the first cover 16A can be easily opened and closed, which contributes to improving the efficiency of inspection work.

  When cleaning the heat exchanger unit 31 or the like, by opening the second cover 16B, a cleaning nozzle of an air compressor, that is, a cleaning tool can be inserted into the shroud chamber 35, and this cleaning operation can be easily performed. The efficiency of the work can be improved, and only the second cover 16B can be opened and cleaned, so the weight load associated with opening and closing the cover can be reduced, thereby facilitating the cleaning work. The efficiency of this cleaning work can be improved.

  Further, when cleaning the front side of the heat exchanger unit 31, foreign matter existing in the air inflow chamber 36 can be smoothly discharged from the opening 36 b through the guide body 52. The efficiency of work etc. can be improved.

  FIG. 7 is a side sectional view showing a main part of another embodiment of the engine compartment according to the present invention. In another embodiment shown in FIG. 7, a hinge portion is provided that rotatably attaches the second cover 16B of the upper surface cover 16 that forms the upper portion of the engine compartment 10 to the frame. That is, the second cover 16B is provided independently of the first divided portion 16B1 that can open and close the upper portion of the air inflow chamber 36 that forms the upstream side of the heat exchanger unit 31, and the first divided portion 16B1. 2nd division part 16B2 which can open and close the upper direction of the shroud chamber 35 is included.

  The first divided portion 16B1 is rotatably attached to the frame 30c by a hinge portion 54, and includes a hook portion 55 at an end portion. The hook portion 55 can be engaged with and disengaged from a locking portion 56 provided on the support plate 32 that supports the heat exchanger unit 31. The second divided portion 16B2 is pivotally attached to the frame 30a by a hinge portion 57, and includes a hook portion 58 at the end. This hook portion 58 can also be engaged and disengaged with another locking portion 59 provided on the support plate 32.

  Further, the bottom cover 18 is rotatably attached to the revolving frame 50 by a hinge part 60, and is fixed to the revolving frame 50 by a bolt when the opening 36b is closed. Similarly, the bottom cover 19 is pivotally attached to the revolving frame 50 by a hinge portion 61, and is fixed to the revolving frame 50 by a bolt when the opening 35b is closed. Other configurations are the same as those of the embodiment shown in FIGS.

  In another embodiment configured as described above, in the cleaning operation, as illustrated in FIG. 7, the engagement between the hook portion 55 and the locking portion 56 of the first divided portion 16 </ b> B <b> 1 is released, and this first operation is performed. By rotating the dividing portion 16B1 upward, an opening 36a that allows insertion of the cleaning nozzle is formed above the air inflow chamber 36. Similarly, by disengaging the hook portion 58 and the locking portion 59 of the second divided portion 16B2, and rotating the second divided portion 16B2 upward, the cleaning nozzle is disposed above the shroud chamber 35. An opening 35a that allows insertion is formed. Further, by removing the bolt that has fixed the bottom cover 18 and rotating the bottom cover 18, the opening 36 b is formed, and the bolt that has fixed the bottom cover 19 is removed and the bottom cover 19 is rotated. Thus, the opening 35b is formed.

  Therefore, the same cleaning as in the embodiment shown in FIGS. 1 to 6 described above can be performed through the openings 36a, 36b, 35a, and 35b. About another effect, it is equivalent to embodiment shown in FIGS. 1-6 mentioned above.

  In the above embodiment, as shown in FIG. 3 or the like, the second cover 16B forming the upper surface cover 16 is fixed to the frame 30a via the bolt 40b, or the second cover 16B is attached as shown in FIG. The second divided portion 16B2 to be configured is attached to the frame 30a by the hinge portion 57. However, the present invention is not limited to this configuration, and the second cover 16B is positioned on the engine 23 side via the bolt 40b. 3 may be fixed to the frame 30b shown in FIG. 3 or the like, and the second divided portion 16B2 constituting the second cover 16B may be attached to the frame 30b shown in FIG.

  Moreover, in the said embodiment, although the 2nd cover 16B can open and close the upper direction of the shroud chamber 35, and the upper direction of the air inflow chamber 36, this invention is not restricted to comprising in this way, The second cover 16B may be configured to be able to open and close only above the shroud chamber 35.

It is a side view which shows the hydraulic excavator mentioned as an example of the construction machine with which one Embodiment of the engine room which concerns on this invention is provided. It is a top view which shows the principal part of one Embodiment of the engine room of this invention with which the hydraulic shovel shown in FIG. 1 is equipped. It is a sectional side view which shows the principal part of one Embodiment of the engine room of this invention with which the hydraulic shovel shown in FIG. 1 is equipped. It is a front view which shows the heat exchanger unit with which one Embodiment of the engine room which concerns on this invention is equipped. It is a perspective view which shows the guide body with which one Embodiment of the engine room which concerns on this invention is equipped. In one embodiment of the engine room concerning the present invention, it is a sectional side view showing an important section in the state where an upper surface cover was opened. It is a sectional side view which shows the principal part of another embodiment of the engine room which concerns on this invention.

Explanation of symbols

2 Revolving body 10 Engine chamber 12 Front cover 13 Rear cover 14 Side cover 15 Side cover 16 Top cover 16A First cover 16A1 Opening portion 16A2 Opening portion 16B Second cover 16B1 First split portion 16B2 Second split portion 16C Third cover 17 Bottom cover 18 Bottom cover 19 Bottom cover 20 Bottom cover 21 Bottom cover 22 Bottom cover 23 Engine 25 Cooling fan 29 Shroud 30a Frame 30b Frame 30c Frame 31 Heat exchanger unit 31a Radiator 31b Oil cooler 31c Intercooler 35 Shroud chamber 35a Opening 35b Opening 35b Part 36 Air inflow chamber 36a Opening part 36b Opening part 37 Hinge part 38 Hook part 39 Locking part 40a Bolt 40b Bolt 52 Guide body 54 Hinge part 55 Foot Part 56 locking portion 57 hinge 58 hook portion 59 engaging portion 60 hinge 61 hinge

Claims (6)

A cooling fan is disposed on the upstream side of the engine, a heat exchanger unit is disposed on the upstream side of the cooling fan, a shroud chamber is formed between the heat exchanger unit and the cooling fan, and a single layer is formed. In the engine room of the construction machine provided with a top cover, and this top cover also serves as the upper wall,
The upper surface cover includes a first cover that can be opened and closed above the engine, and a second cover that is provided independently of the first cover and can be opened and closed above the shroud chamber. Engine room for construction machinery. In the invention of claim 1,
An engine room of a construction machine, comprising a frame to which the second cover is fixed, and a bolt for fixing the second cover to the frame. In the invention of claim 1,
An engine room of a construction machine, comprising a frame to which the second cover is fixed, and a hinge portion for rotatably attaching the second cover to the frame. In the invention of claim 3,
The second cover is provided with a first divided part capable of opening and closing an upper part of an air inflow chamber forming an upstream side of the heat exchanger unit, and the first divided part is provided independently of the first divided part, and is provided above the shroud chamber. An engine room of a construction machine, comprising: a second divided portion that can be opened and closed. In the invention according to any one of claims 1 to 4,
An engine room of a construction machine, comprising a hinge portion for rotatably mounting the first cover. In the invention of claim 1,
A bottom cover capable of opening and closing the lower part of the air inflow chamber forming the upstream side of the heat exchanger unit;
The air inflow chamber is provided with a foldable guide body that discharges foreign matter flowing into the air inflow chamber from an opening below the air inflow chamber formed when the bottom cover is opened. The engine room of the construction machine that is characteristic.

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