JP3360960B2 - Construction machinery - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a construction machine such as a hydraulic excavator, and more particularly to a construction machine provided with a vent for outside air for cooling an engine or the like housed in a machine room.

[0002]

2. Description of the Related Art An engine mounted on a construction machine such as a hydraulic excavator is generally housed together with an air cleaner, a radiator and the like in a machine room provided in a work machine body.
Then, a vent hole for taking in outside air into the machine room is usually formed in a part of the cover that covers the machine room, and the outside air taken into the machine room through the vent hole passes through the inside of the radiator. Cooling the engine by promoting heat dissipation of flowing cooling water,
It is designed to be sucked into the engine via an air cleaner.

Therefore, a hydraulic excavator will be described as an example of a conventional construction machine with reference to FIGS. 4 to 6. FIG.

In the figure, 1 is a lower traveling body, 2 is an upper revolving body as a working machine body mounted on the lower traveling body 1 so as to be rotatable, and the upper revolving body 2 is a revolving body frame. A frame 3, a driver's cab 4 provided on the left side of the front part on the turning frame 3 and equipped with operating devices, and a machine room provided on the turning frame 3 behind the driver's cab 4. 5 and a counterweight 6 provided behind the machine room 5 and the like.

Reference numeral 7 denotes a working device located on the front side of the upper revolving structure 2 and provided on a bracket (not shown) of the revolving frame 3. The working device 7 can be lifted and lowered on the bracket of the revolving frame 3. A boom 8 provided, an arm 9 provided at the tip of the boom 8 so as to be able to descend and descend, and the arm 9
And a bucket 10 rotatably provided on the tip side of the boom 8, the boom 8, the arm 9, and the bucket 10 are operated by a boom cylinder 11, an arm cylinder 12, and a bucket cylinder 13, respectively.

Reference numeral 14 denotes an engine housed in the machine room 5. By operating the engine 14, a hydraulic pump or the like (not shown) is rotationally driven, and the pressure oil discharged from the hydraulic pump is run. And hydraulic motors for turning and the cylinders 11 to 13 are supplied to operate them.

Reference numeral 15 denotes a radiator attached to the engine 14. The radiator 15 cools the engine 14 with cooling water circulating therein, and the radiator 15 is cooled by the outside air taken into the machine room 5 through a vent hole 31 described later. By cooling the cooling water inside the engine 15, the cooling effect of the engine 14 is enhanced.

Reference numeral 16 denotes a building that covers the machine room 5. The building 16 has left and right side covers 17 (only one of which is shown) which are erected upward from both left and right ends of the revolving frame 3.
A plurality of upper covers 18A, 18B, 18C provided so as to be combined with the upper ends of the respective side covers 17.
And an engine cover 19 for covering an inspection window (not shown) of the engine 14 formed in each of the upper covers 18A to 18C.

Reference numeral 20 denotes an air cleaner provided below the upper cover 18A and provided in the machine room 5. The air cleaner 20 has a casing 21 formed in a cylindrical shape with a bottom, as shown in FIG. The filter element 22 and the like housed in the casing 21 are generally configured.
Then, the casing 21 has an outside air introduction pipe 21A provided on a side surface thereof and opened to the outside, and an intake air supplied to the engine 14 through a pipe 23 and air purified by a filter element 22 provided at a central portion of a bottom surface thereof. Outlet pipe 2
And 1B are projected. Further, a bracket 24 for mounting the air cleaner 20 in the machine chamber 5 is fixed to the side surface of the casing 21 by means such as welding.

Reference numeral 25 denotes a front support member which is located in front of the air cleaner 20 and is provided in the machine room 5. The front support member 25 is formed in a substantially L shape as a whole. A front end portion of a front cover 26 forming a part of the upper cover 18A is screwed to the upper end side which is fixed and extends in the width direction of the machine chamber 5.

Reference numeral 27 denotes a rear support member which is located at the rear side of the air cleaner 20 and is provided in the machine room 5. The rear support member 27 is formed in a gate shape as a whole, and, for example, a pair of lower end sides of the swivel frame 3 are provided. Machine room 5 as well as being fixed
A rear end portion of a louver 30 described later is screwed to an upper end side extending in the width direction of the.

Reference numeral 28 denotes an intermediate support member provided between the front support member 25 and the rear support member 27 and provided in the machine room 5. The intermediate support member 28 is formed in a substantially rectangular plate shape as a whole. And an insertion hole 2 through which the outside air introduction pipe 21A of the air cleaner 20 is inserted at a predetermined position above it.
8A is drilled. Here, the intermediate support member 28
Is erected on the revolving frame 3 so as to sandwich the air cleaner 20 between the front support member 25 and the front support member 25 and an intermediate support member 28, and an air cleaner mounting plate 29 for mounting the air cleaner 20 is provided on the upper end sides of the front support member 25 and the intermediate support member 28. It is fixed.

The bracket 24 of the air cleaner 20 is screwed to the air cleaner mounting plate 29, and the air cleaner 20 has its outside air introducing pipe 21A inserted into the insertion hole 28A of the intermediate support member 28. It is supported in the machine room 5 by the front support member 25 and the intermediate support member 28 via. The rear end of the front cover 26, whose front end is screwed to the front support member 25, is screwed to the upper end side of the intermediate support member 28 extending in the width direction of the machine room 5, and the front end of the louver 30 is also screwed. The part is screwed.

Reference numeral 30 denotes a louver provided between the intermediate support member 28 and the rear support member 27.
As shown in FIG. 6, 0 is a front mounting portion 30A screwed to the intermediate support member 28, a rear mounting portion 30B screwed to the rear support member 27, a front mounting portion 30A and a rear mounting portion 30B. And a plurality of stays 3 arranged at a predetermined interval between the front mounting portion 30A and the rear mounting portion 30B.
It is composed of 1, 31 ,. Here, the respective stays 31 are welded at a front end portion thereof to the front side mounting portion 30A and at a rear end portion thereof to the rear side mounting portion 30B at predetermined intervals, and are formed between the respective stays 31. The plurality of gaps form a vent 32 that allows outside air to flow between the machine room 5 and the outside.

In the hydraulic excavator constructed as described above, when the engine 14 in the machine room 5 is operated, outside air is taken into the machine room 5 through the ventilation port 32 formed by the louver 30, and the outside air is taken in. Is introduced into the air cleaner 20 through the outside air introduction pipe 21A, is cleaned by removing dust by the filter element 22, and is then sucked into the engine 14 through the pipe 23 from the intake lead-out pipe 21B. Further, most of the outside air taken into the machine room 5 is guided to a cooling fan (not shown) of the engine 14 to cool the cooling water circulating in the radiator 15 to enhance the cooling effect of the engine 14. It has become.

[0016]

By the way, in the hydraulic excavator according to the above-mentioned conventional technique, the intermediate support member 28 is provided between the front support member 25 and the rear support member 27, and the intermediate support member 28 is used to interpose the front support member 28. Since the front cover 26 and the louver 30 are arranged between the support member 25 and the rear support member 27, the opening area of the vent 32 formed by the louver 30 is smaller than that of the intermediate support member 28 and the rear support member 27. By being limited to the range partitioned by the support member 27, the amount of outside air taken into the machine room 5 becomes insufficient, and as a result, a sufficient cooling effect for the engine 14 cannot be obtained. .

By providing the intermediate support member 28, the front cover 26 and the louver 30 are separately provided between the front support member 25 and the rear support member 27, and the air cleaner is provided in the machine chamber 5. To support 20, the front support member 25 and the intermediate support member 2
Since the air cleaner mounting plate 29 is provided between the parts 8 and 8, there is a problem that the number of parts and the man-hours for assembling the parts increase accordingly, which causes an increase in manufacturing cost.

The present invention has been made in view of the above problems of the prior art, and an object of the present invention is to provide a construction machine capable of improving the cooling effect of the engine and reducing the number of parts.

[0019]

In order to solve the above-mentioned problems, the present invention provides a lower traveling body, a working machine main body provided on the lower traveling body, and a working machine main body provided with The present invention is applied to a construction machine provided with a machine room accommodating an engine and an air cleaner for cleaning air taken into the engine, and a cover member covering the machine room.

A feature of the configuration adopted by the invention of claim 1 is that the cover member is located in front of the air cleaner and is provided in the machine chamber.
A rear support member provided on the rear side of the air cleaner and provided in the machine chamber, and a front end side fixed to the front support member and a rear end side fixed to the rear support member, and housed in the machine chamber. consists of a louver forming the outside air vents for cooling the engine, the louver has a cover before covering the top of the machine room is fixed to the front support member, fixed to said rear support member a cover after covering the upper portion of the machine room, the front is formed by a plurality of stays provided apart from each other between the cover and the rear <br/> cover, the plurality of stay At least one of
The book of the stay, the precursor extend under Menma of the front cover
It is designed to be welded to the bottom surface of the bar .

[0021] In this case, as in the invention of claim 2, wherein the lower surface of the front cover, when Ru is provided a mounting portion for the air cleaner
In both cases , it is desirable that the air cleaner is mounted via the air cleaner mounting portion.

[0022]

According to the configuration of the action invention of claim 1, the cover after the previous and cover before being secured to the support member covers the top of the machine room, and is fixed to the rear support member to cover the upper part of the machine room,
To form a louver and a plurality of stays provided between the respective cover, is extended under Menma before cover at least one of the stays of the plurality of stays constituting a louver welding
By doing so, the rigidity of the louver can be increased, and the support member between the front support member and the rear support member can be eliminated . For this reason , the area of the outside air vent formed by the louver can be increased, and the amount of outside air taken into the machine room can be increased.

Further, according to the configuration of the invention of claim 2, by attaching the air cleaner to the lower surface side of the front cover via the mounting portion for the air cleaner, eliminates components used only for mounting the air cleaner, the number of parts And the number of parts assembling steps can be reduced.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. In the embodiments, the same components as those of the above-described conventional technique are designated by the same reference numerals, and the description thereof will be omitted.

In [0025] Figure 41 represents a louver according to this embodiment which is provided between the rear support member 27 and the front support member 25, cover 42 before the louver 41 to be described later,
Rear cover 43, the connecting portion 44 and the stays 45A~45
A louver 30 according to the prior art integrally formed by D
Of what is substantially the same structure when, differs from the prior art in structure, such as the front cover 42 and the stays 45A to 45D.

[0026] 42 in front cover of the louver 41, the front cover
Over 42, as shown in FIGS. 2 and 3, is formed as the rear end side of the plate-like body having a substantially right angle bent portion 42A, by the front end portion is screwed to the front support member 25, machine room 5 constitutes a part of the upper cover 18A that covers the upper side of 5.

[0027] 43 indicates a cover after the louvers 41, similarly to the rear side mounting portion 30B by rear <br/> cover 43 is prior art, opposing the front end side of the bent portion 42A of the front cover 42 It is formed as a plate-like body that serves as a bent portion 43A, and its rear end portion is screwed to the rear support member 27 to form a part of the upper cover 18A that covers the upper side of the machine chamber 5.

[0028] 44 is a connecting portion connecting front cover 42 and the rear cover 43 in the longitudinal direction of the machine chamber 5, the connecting portion 44 is substantially the same as the coupling portion 29C according to the prior art, its one side end Although it is formed as a plate-like body having a bent portion 44A of a substantially right angle, the dimension in the front-back direction is set larger than that of the connecting portion 29C. The coupling portion 44, the front end face in the bent portion 42A of the front cover 42, rear cover and rear surfaces over 4
Are respectively welded to the third bent portion 43A, front cover 42,
It constitutes a part of the top cover 18A together with the rear cover 43.

45A, 45B, 45C and 45D are front covers
Shows four stays arranged between the rear cover 43 and over 42, respective stay 45A~45D comprises different from flat bar of lengths, the front end portion of the front cover 42
To, it is welded at predetermined intervals from each other, respectively to the rear cover 43 to the rear end portion, the gap formed between the respective stays 45A to 45D, circulating the ambient air to and from the machine room 5 and the outside vent A mouth 46 is formed.

[0030] Here, the stay 45B and 45D of the respective stays 45A~45D the longitudinal dimension than the other stays 45A and 45C are larger, to the lower surface side of the front side front cover 42 It has been extended. The stays 45A and 45C have their front end portions covered by the front cover.
The bent portion 42A of over 42, are welded respectively to rear ends to the bent portion 43A of the rear cover 43, the stay 45B and 45
The rear end of the D although is welded to the bent portion 43A of the rear cover 43, a portion located on the lower surface side of the front <br/> cover 42 of the front end of the stay 45B and 45D, the entire It is welded before the lower surface of the cover 42 over the circumference. Thus, the entire louvers 41 which are integrally formed increases the rigidity of the connecting portion, front cover 42, rear cover 43, the connecting portion 44 and the stays 45A~45D the front cover 42 and the stay 45B and 45D The rigidity of can be increased.

[0031] 47, 47, ... are provided on the lower surface side of the front cover 42 shows three spacers as mounting portion of the air cleaner 20, each of said spacers 47 before cover 42 as shown in FIG. 3 It is welded to the lower surface portion, and the lower end surfaces of the respective stays protrude below the lower end surfaces of the stays 45A to 45D. Then, before the center of the spacer 47 cover 4
2 has a bolt insertion hole 47A penetrating therethrough, and the air cleaner 20 has the bolt 4 inserted into the bolt insertion hole 47A.
8,48, a bracket 24 fixed to the side surface of the casing 21 through a ... by fixing the respective spacers 47, so as before mounted in the machine chamber 5 positioned below the cover 42 There is.

The hydraulic excavator according to the present embodiment has the above-mentioned structure, and is taken into the machine room 5 through the ventilation port 46 of the louver 41 when the engine 14 housed in the machine room 5 is operated. Regarding the action of cooling the cooling water circulating in the radiator 15 by the outside air, there is no particular difference from the conventional technique.

However, according to this embodiment, the stay 45B of the stays 45A to 45D constituting the louver 41 is included.
And 45D extend up to the lower surface side of the front cover 42 by soluble
Since the louver 41 is configured to be supported by the front support member 25 and the rear support member 27 by being fixed by contact and increasing the rigidity of the entire louver 41, it is possible to eliminate the intermediate support member 28 used in the prior art. You can As a result, the opening area of the vent hole 46 formed by the louver 41 is increased, and the amount of outside air taken into the machine room 5 can be increased, and as a result, the cooling effect of the engine 14 is significantly improved. be able to.

Further, by increasing the rigidity of the entire louver 41, the front cover 42 together constituting a part of the upper cover 18A, each spacer 47 as a mounting portion of the air cleaner 20 to the lower surface of the front cover 42 Since it is provided, the front cover 26 and the air cleaner mounting plate 29 according to the prior art can be eliminated in addition to the above-described intermediate support member 28, and the number of parts and the number of man-hours for assembling the parts can be reduced. As a result, the manufacturing cost can be significantly reduced.

In the above embodiment, in order to increase the rigidity of the louver 41, each stay 45A forming the louver 41 is formed.
Two of ~45D has been described by taking a case where the extended (the stay 45B and 45D) to the lower surface side of the front cover 42 as an example, the present invention is not limited thereto, for example, the stays 45A may the one of the ~45D is extended to the lower surface side of the front cover 42, it may be configured to further extend three or more stays to the lower surface side of the front cover 42.

Further, in the above-mentioned embodiment, the hydraulic excavator has been described as an example of the construction machine, but the present invention is not limited to this, and for example, a hydraulic crane, a wheel loader or another engine equipped with a bulldozer or the like is mounted. It can also be applied to construction machinery.

[0037]

According to the invention as claimed in claim 1 described above in detail, according to the present invention, a cover prior to being fixed to the front support member, and the cover after being fixed to the rear support member, between the respective cover to form a louver by a plurality of stays provided, and configured to be welded is extended under Menma least one stay <br/> front cover out of the plurality of stays constituting the louver Therefore, it is possible to increase the rigidity of the louver, and between the front support member and the rear support member, as in the case of the conventional technique.
Since it is not necessary to provide an intermediate support member, the opening area of the ventilation port formed by the louver can be increased. As a result, the amount of outside air taken into the machine room can be increased, and the cooling effect of the engine can be greatly improved.

Further, according to the invention of claim 2, the air cleaner attachment portion provided on the lower surface of the front cover constituting the louver, by attaching the air cleaner under surface of the front cover through the mounting portion Since parts used only for attaching the air cleaner can be eliminated, the number of parts can be reduced as compared with the conventional technology, and the number of assembly steps of parts can be reduced, resulting in a significant reduction in manufacturing cost. it can.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view showing a machine room and the like of a hydraulic excavator according to an embodiment of the present invention.

FIG. 2 is a plan view showing a louver, an air cleaner and the like shown in FIG.

FIG. 3 is a cross-sectional view of the louver viewed from the direction of arrows III-III in FIG.

FIG. 4 is an external view showing a hydraulic excavator as a construction machine according to a conventional technique.

FIG. 5 is a partially cutaway perspective view showing a machine room and the like of a hydraulic excavator according to a conventional technique.

6 is a plan view showing a louver, an air cleaner and the like shown in FIG.

[Explanation of symbols]

1 undercarriage 2 upper rotating body (machine body) 5 machine room 18A, 18B, 18C upper cover (cover member) 25 front support member 27 after the support member 41 louver 42 front cover 43 after cover 45A, 45B, 45C , 45D Stay 46 Vent 47 Spacer (mounting part for air cleaner)

Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) B60K 11/04 B60K 11/08 F01P 1/00 F01P 9/00

Claims (2)

(57) [Claims] 1. A lower traveling body, a working machine main body provided on the lower traveling body, and an air cleaner provided in the working machine main body for cleaning an engine and air drawn into the engine. In the construction machine including the machine room and a cover member that covers the machine room, the cover member includes a front support member that is located in front of the air cleaner and is provided in the machine room, and a rear side of the air cleaner. For cooling the engine housed in the machine room, the rear support member being provided in the machine room and the front end side being fixed to the front support member and the rear end side being fixed to the rear support member. made from the outside air louver forming a vent, the louver has a cover before covering the top of the machine room is fixed to the front support member, solid to the rear support member A cover after to cover the top of the machine chamber, wherein the front cover
It is formed by a plurality of stays provided apart from each other between the over and rear cover, at least one of the stays of the plurality of stays, extending under Menma of the front cover Welded to the lower surface of the front cover
A construction machine characterized by having the structure . Under surface according to claim 2, wherein the front cover, the construction machine according to claim 1, Rutotomoni provided a mounting portion for an air cleaner, through for the air cleaner attachment portion comprising a structure for mounting the air cleaner.