JP2001227343A - Construction machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily attach and detach a partitioning means between a building cover and a fan shroud in a state of a cooling pipe preciously mounted on a heat exchanger. SOLUTION: A cooling water pipe 18 to be connected to the heat exchanger 16 and air pipes 22, 23 are arranged so as to extend from a part between an engine cover 10 and a fan shroud 24 toward an engine side. Cutouts 32B, 32C and 32D are provided on the partitioning plate 32 for constituting a partitioning device 31, and the cutouts 32B, 32C and 32D are fitted to respective pipes 18, 22 and 23. The partitioning plate 32 is fastened to mounting brackets 25 on the fan shroud side 24 in this state. A sealing plate 34 having a slit 34B is provided on the partitioning plate 32, and a part between the cutout 32B and the cooling water pipe 18 is blocked up with the sealing plate 34. Clearances between the cutouts 32C, 32D and the air pipes 22, 23 are respectively blocked up with sealing plates 36, 38.

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 shovel, and more particularly to a construction machine provided with a heat exchanger such as a radiator or an intercooler.

[0002]

2. Description of the Related Art Generally, construction machines such as hydraulic excavators are
It is generally constituted by a lower traveling body, an upper revolving body pivotally mounted on the lower traveling body, and a working device provided on the front side of the upper revolving body for excavating soil and the like.

[0003] The upper revolving superstructure comprises a revolving frame provided with a working device on the front side, a building cover provided on the revolving frame and having an air intake, and the revolving frame positioned in the building cover. And an engine mounted thereon, and a heat exchanger is arranged between the air intake and the engine (for example, Japanese Patent Application Laid-Open No. 10-103065).

Further, the heat exchanger includes a radiator that cools cooling water from the engine, an intercooler that cools intake air from a supercharger provided in the engine, and the like. The intercooler is connected to a pair of cooling pipes for supplying and discharging intake air from the supercharger to the intercooler.

In this type of conventional hydraulic excavator, a cooling fan is rotated by an engine, so that outside air is sucked into a building cover from an air intake as cooling air, and the cooling air is directed to a radiator, an intercooler and the like. It is configured to circulate and cool these sequentially.

In addition, a partition member is provided between the building cover and the heat exchanger, and the cooling air after passing through the heat exchanger flows from between the building cover and the heat exchanger toward the air intake side. This prevents backflow and increases the cooling efficiency of the heat exchanger.

Here, in this prior art, the intercooler is arranged on the opposite side of the radiator from the engine. Then, a pair of cooling pipes connected to the intercooler is inserted into a through hole provided in the partition member through a heat-resistant seal material, and in this state, the cooling pipe is routed from above the radiator or the like to the engine side. It has a configuration.

[0008]

In the prior art described above, the cooling pipe is inserted into the through-hole of the partition member via a heat-resistant sealing material. The cooling pipe must be inserted into the through-hole of the partition member through a heat-resistant sealing material by means such as press-fitting, and such a work of inserting the cooling pipe is troublesome for an operator. And the workability is reduced.

Further, when the partition member is removed during maintenance of the hydraulic excavator, it is necessary to remove the cooling pipe together with the partition member, and in this case, there is a problem that the workability is reduced.

Further, since the partition members are individually attached to the pair of cooling pipes, it is necessary to perform the mounting work of the partition members for each cooling pipe, which further reduces the workability and the parts. There is a problem that the score also increases.

In order to solve such a problem,
A method is also conceivable in which the partition member is divided into upper and lower parts, and a pair of these two divided members is sandwiched from above and below on the outer peripheral side of the cooling pipe.

However, in this case, it is necessary to prepare upper and lower partition members for each cooling pipe, which not only increases the total number of parts but also complicates the mounting structure of the partition members. There is.

The present invention has been made in view of the above-mentioned problems of the prior art, and an object of the present invention is to provide a partitioning means for connecting a building cover and a heat exchanger with a cooling pipe previously attached to the heat exchanger. It is an object of the present invention to provide a construction machine which can be easily attached and detached in between and can reduce the total number of parts.

[0014]

In order to solve the above-mentioned problems, a construction machine according to the present invention includes a building cover provided on a frame and having an air intake port on one side, and a building cover located in the building cover. An engine mounted on the frame, a cooling fan that is driven to rotate by the engine and supplies cooling air from the air intake toward the engine; and a cooling fan positioned between the air intake and the cooling fan. A heat exchanger having a cooling pipe provided on the frame and extending toward the engine, a fan shroud provided in the heat exchanger and surrounding the cooling fan from outside,
Partition means for preventing the cooling air after passing through the heat exchanger from flowing backward from between the building cover and the heat exchanger toward the air intake side.

A feature of the structure adopted by the invention of claim 1 is that the partitioning means has a notch provided in one of the heat exchanger and the fan shroud for inserting the cooling pipe. A partition plate, a sealing plate provided on the partition plate to close a gap between the cooling air pipe and the notch, and a seal provided between the building cover and the partition plate provided along the partition plate. It is constituted by the cover side seal.

[0016] With this configuration, when the partitioning means is attached, first, the notch provided in the partition plate is partitioned into the building cover so as to fit around the cooling pipe provided in the heat exchanger. The plate is arranged, and the partition plate is attached to the heat exchanger or the fan shroud in this state. Then, the sealing body is attached to the partition plate.

Thus, the cooling pipe can be inserted into the notch of the partition plate, and the gap between the notch and the cooling pipe can be closed by the sealing member. Further, the space between the partition plate and the building cover can be sealed by a cover-side seal provided along the partition plate.

According to a second aspect of the present invention, the sealing body comprises a flat sealing plate formed of a heat-resistant elastic material with a size larger than the notch. An insertion hole through which the cooling pipe is inserted, and a slit extending from the outer surface of the sealing plate toward the insertion hole to put the cooling pipe into and out of the insertion hole.

Thus, at the time of mounting the sealing body, the slit provided in the sealing body is pulled up and down or the like so as to expand the slit. Then, the cooling pipe is inserted into the insertion hole by fitting the insertion hole of the sealing body to the outer peripheral side of the cooling pipe through the expanded slit and releasing the tensile force in this state. it can.

According to a third aspect of the present invention, the building cover comprises:
A left and right side cover, a top cover provided between the left and right side covers and having an opening at a position corresponding to the engine and the heat exchanger, and an openable and closable cover that covers the opening. The cooling pipe is located between the engine cover and the fan shroud and extends in the longitudinal direction of the engine. Thereby, the cooling pipe can be routed from the space between the engine cover and the fan shroud toward the engine.

Further, according to the invention of claim 4, the partition plate is made of a plate material for closing a space between the engine cover and the fan shroud, and the cover-side seal extends along the partition plate and is provided on an inner surface of the engine cover. It is constituted by a hollow sealing member that is in elastic contact. Thus, in a state where the space between the engine cover and the fan shroud is closed by the partition plate, the space between the partition plate and the inner surface of the engine cover can be satisfactorily sealed using the sealing member without any gap.

Further, the invention according to claim 5 has a structure in which a reinforcing material is filled in a portion where the seal member is bent inside the seal member. Thus, the portion of the seal member that bends along the partition plate can be reinforced using the reinforcing material.

On the other hand, the invention of claim 6 is configured such that the engine cover is provided with a concave groove along the portion where the seal member contacts. Thereby, the seal member can be brought into wide contact with the wall surface of the groove provided in the engine cover, and the sealing property of the seal member can be improved.

According to a seventh aspect of the present invention, the heat exchanger includes a radiator for cooling cooling water from the engine, and an intercooler for cooling intake air from a supercharger provided in the engine. The cooling pipe is a radiator-side pipe that connects between the radiator and the engine,
And an intercooler-side pipe connecting between the engine and the intercooler.

Thus, the piping on the radiator side and the piping on the intercooler side can be easily routed, for example, from the gap between the engine cover and the heat exchanger to the engine side through the notch in the partition plate.

[0026]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A construction machine according to an embodiment of the present invention will now be described in detail with reference to the accompanying drawings, taking an example in which the construction machine is applied to a hydraulic shovel.

FIGS. 1 to 7 show a first embodiment of the present invention, wherein 1 is a lower traveling body of a hydraulic shovel, 2
Is an upper revolving structure that is rotatably mounted on the lower traveling structure 1. The upper revolving structure 2 includes a revolving frame 3, a cab 4 provided on the front left side of the revolving frame 3, and a revolving frame 3. And a counterweight 5 provided on the rear side of the turning frame 3, and a working device 6 for excavating soil and the like is provided at a front portion of the turning frame 3.

Here, as shown in FIG. 2, the revolving frame 3 is composed of left and right center frames 3 arranged substantially in parallel.
A, 3A, side frames 3B, 3B provided outside the left and right directions of each center frame 3A, and a plurality of overhang beams 3C, 3C connecting the side frames 3B and the center frame 3A. Generally, the lower side of the revolving frame 3 is covered by under covers 3D, 3D,. On the left side of the revolving frame 3, a bracket 3E is provided integrally between the center frame 3A and the side frame 3B and supports a radiator 17 of a heat exchanger 16, which will be described later.

Reference numeral 7 denotes a building cover provided on the revolving frame 3. The building cover 7 is, as shown in FIG. 2, left and right side covers 8 standing upright along the side frames 3B, 3B. , 8 and the upper end of each side cover 8 to the left,
A top cover 9 extending rightward and having an opening 9A formed at a position corresponding to an engine 12 and a heat exchanger 16 to be described later;
The upper cover 9 covers the opening 9A of the upper cover 9.
And an engine cover 10 (see FIG. 3) provided to be openable and closable.

A left side cover 8 of the building cover 7 is also provided.
2, an air intake 11 is provided at a position corresponding to the heat exchanger 16, and the air intake 11 is directed toward the heat exchanger 16 and the like in the building cover 7 using outside air as cooling air. It is for guiding. Further, the opening 9A of the top cover 9 is configured as a working hole for taking out or attaching the heat exchanger 16 from the inside of the building cover 7 during maintenance of the engine 12 and the heat exchanger 16, for example. is there.

Reference numeral 12 denotes an engine mounted on the revolving frame 3 located in the building cover 7.
As shown in FIG. 2, each center frame 3A of the turning frame 3
It is mounted horizontally so as to extend leftward and rightward.

Reference numeral 13 denotes a cooling fan provided on the left end side of the engine 12. The cooling fan 13 is driven to rotate by the engine 12, thereby sucking outside air from the air inlet 11 of the building cover 7 as cooling air. The cooling air is sequentially supplied to the radiator 17, the oil cooler 20, the intercooler 21, the engine 12, and the like of the heat exchanger 16 to cool them.

Further, a hydraulic pump 14 is provided at the other end of the engine 12, and the hydraulic pump 14
To supply hydraulic oil (pressure oil) to each hydraulic actuator provided in the lower traveling body 1, the working device 6, and the like.

Reference numeral 15 denotes a supercharger provided in the engine 12. The supercharger 15 has a drive side turbine chamber in the engine 1.
2 is provided on the exhaust pipe (not shown) side, and the driven side turbine chamber is provided at an intermediate portion (not shown) of the intake pipe including air pipes 22 and 23 to be described later. And the supercharger 15
Rotates the turbine using the exhaust gas from the engine 12 and pressurizes the air taken in from the intake pipe,
The air is supplied to an intake manifold (not shown) of the engine 12 via an intercooler 21 described later.

A heat exchanger 16 is provided between the air intake 11 and the engine 12 and provided on the revolving frame 3. The heat exchanger 16 includes a radiator 17, an oil cooler 20, and an intercooler 21 which will be described later. It is constituted by.

A radiator 17 is provided on the turning frame 3 so as to face the cooling fan 13.
The lower end is attached to the bracket 3E of the revolving frame 3, the upper end protrudes upward from the opening 9A of the building cover 7, and is housed in the engine cover 10.

The radiator 17 is connected to the engine 12
The cooling water from the engine is circulated through the cooling water pipes 18 and 19 into the heat radiating portion 17A, thereby exchanging the heat of the engine cooling water with the heat radiating portion 17A and releasing the heat into the cooling air. It cools water.

Reference numeral 18 denotes an inflow-side cooling water pipe (hereinafter, referred to as a cooling water pipe) as a cooling pipe provided on the radiator 17 side, and the cooling water pipe 18 has a left end as shown in FIGS. Side is connected to the upper end side of the radiator 17,
The right end is bent downward in a substantially L-shape and connected to a cylinder block (not shown) of the engine 12. The cooling water pipe 18 is disposed so as to extend in the length direction of the engine 12 from the radiator 17 side through the upper side of a fan shroud 24 described later.

Reference numeral 19 denotes an outflow-side cooling water pipe (hereinafter referred to as a cooling water pipe) as another cooling pipe provided on the radiator 17 side, and the cooling water pipe 19 has a radiator 17 at the left end as shown in FIG. The right end (not shown) is connected to a cylinder block of the engine 12.

Reference numeral 20 denotes an oil cooler provided integrally with the radiator 17. The oil cooler 20 radiates return oil (hydraulic oil) from hydraulic actuators provided on the lower traveling unit 1 and the working device 6 to a radiator 20A. By circulating the return oil, the heat of the return oil is exchanged by the heat radiating portion 20A and released into the cooling air to cool the return oil.

Reference numeral 21 denotes an intercooler provided integrally with the oil cooler 20, and the upper end of the intercooler 21 extends from the opening 9A of the building cover 7 to the engine cover 1.
It projects upward to a position higher than the radiator 17 and the oil cooler 20 inward.

Then, the intercooler 21 is connected to the engine 1
The air taken in by the supercharger 15 is circulated and circulated to the heat radiating portion 21A through air pipes 22 and 23, which will be described later. Then, the intake air is cooled.

Reference numeral 22 denotes an inflow-side air pipe (hereinafter, referred to as an air pipe) serving as a cooling pipe provided at an upper end side of the intercooler 21, and the air pipe 22 has an intercooler 21 on a left end side as shown in FIGS. And the right end is connected to the supercharger 15.

Reference numeral 23 denotes an outflow-side air pipe (hereinafter, referred to as an air pipe) serving as another cooling pipe provided on the upper end side of the intercooler 21 together with the air pipe 22.
3 is an intercooler 21 on the left end side as shown in FIGS.
And the right end is connected to the intake manifold side of the engine 12.

Here, the air pipes 22 and 23 are disposed apart from each other in the width direction of the intercooler 21, and pass through the oil cooler 20, the radiator 17, and the fan shroud 24 from the side of the intercooler 21, respectively. It is arranged so that it may extend in the vertical direction.

Numeral 24 denotes a fan shroud provided on the radiator 17 on the outer peripheral side of the cooling fan 13,
The fan shroud 24 is formed as a stepped cylindrical body as a whole, and is disposed so as to surround the cooling fan 13 from outside. The fan shroud 24 is formed as a substantially quadrangular frame-like body and is fastened to the end face side of the radiator 17 using bolts or the like, and is reduced in diameter from the square tube portion 24A and extends rightward. Drum-shaped cylindrical part 24B
And is constituted by.

The fan shroud 24 covers the cooling fan 13 from outside, forms a cooling air passage for guiding the cooling air generated by the cooling fan 13 toward the radiator 17, and generates noise and the like when the cooling fan 13 is driven. It also has a function as a soundproof wall for reducing noise.

Here, the square tubular portion 2 of the fan shroud 24
4A is provided with a pair of mounting brackets 25, 25 to which a partition plate 32 described later is mounted separately from the front and rear. The mounting bracket 25 is formed of a rectangular plate, and the lower end is fixed to the upper surface of the rectangular tube portion 24A by welding. 4 and 5, a nut 25A is welded to the upper end of the mounting bracket 25 on the opposite side to the partition plate 32, as shown in FIGS.
Constitutes a screw hole to which a fastening bolt 33 described later is attached.

A partitioning device 31 is provided between the engine cover 10 and the fan shroud 24 and provided on the side of the fan shroud 24. The partitioning device 31 includes a partition plate 32, a first, a second and a second, which will be described later. 3 sealing plates 34, 36, 38
And a cover-side seal 40. The partitioning device 31 prevents the cooling air that has passed through the heat exchanger 16 from flowing backward from between the engine cover 10 and the heat exchanger 16 toward the air intake 11.

Reference numeral 32 denotes a rectangular tube portion 24 of the fan shroud 24.
A partition plate that is detachably provided on the A side.
Is formed as a substantially square (trapezoidal) flat plate by using a metal plate such as a steel plate having rigidity.

Here, at the lower end of the partition plate 32, FIG.
As shown in FIG. 7, a substantially U-shaped cutout recess 32A is formed along the front and rear plate width directions. In addition, the partition plate 3
A first notch 32B is provided on the lower end side of the second notch 32B extending upward from the notch recess 32A to a position corresponding to the cooling water pipe 18 in an inverted U-shape (semicircular shape).

At the lower end of the partition plate 32, a second and a second U-shaped (semicircular arc) extending upward from the notch recess 32A to positions corresponding to the air pipes 22 and 23, respectively. Three notches 32C and 32D are provided.

Further, notches 32B,
Bolt insertion holes 32E, 32E for inserting the fastening bolts 33 to be described later are located between the holes 32C and 32C.
Screw holes 32 for mounting fastening screws 35, 37, 39, which will be described later, are located around the notches 32B, 32C, 32D.
F, 32F,...

The partition plate 32 has notches 32B, 3
The upper end portions of 2C and 32D are loosely fitted around the cooling water pipe 18 and the air pipes 22 and 23, respectively, and the cutout recess 32A is fitted to the outer peripheral side of the upper portion of the rectangular cylindrical portion 24A of the fan shroud 24 without any gap. . Then, in this state, the partition plate 32 is fastened to the mounting bracket 25 using the fastening bolts 33 to close the space between the engine cover 10 and the fan shroud 24.

Reference numeral 34 denotes a first sealing plate, which is located on the outer peripheral side of the first notch 32B and is removably fixed to the partition plate 32 and is provided as a sealing body. The plate 34 is made of a first material by using an elastic material such as rubber having heat resistance.
Is formed as a rectangular flat plate having a size larger than the notch 32B.

In the sealing plate 34, a circular pipe insertion hole 34A is formed in the center, and a slit 3 linearly extending from the outer surface toward the pipe insertion hole 34A.
4B is formed. The sealing plate 34 is fixed to the partition plate 32 by a plurality of fastening screws 35 (see FIGS. 3 and 4) in a state where the cooling water pipe 18 is inserted into the pipe insertion hole 34A through the slit 34B. .

The slit 34B of the sealing plate 34 is expanded by an operator when the sealing plate 34 is mounted, as will be described later. In this state, the cooling water pipe 18 is inserted into the pipe insertion hole 34A.
It is for putting in and out easily. The sealing plate 34 has a configuration in which the space between the cooling water pipe 18 and the first notch 32B is closed without any gap, and the space therebetween is hermetically sealed.

Numeral 36 denotes a second sealing plate, which is located on the outer peripheral side of the second notch 32C and is detachably provided on the partition plate 32, as a sealing body. Also the first
Almost the same as the sealing plate 34, by using an elastic material such as rubber having heat resistance, it is formed as a rectangular flat plate having a size larger than the second notch 32C.

A circular pipe insertion hole 36A is formed in the sealing plate 36, and a slit 36 extending linearly from the outer surface of the sealing plate 36 toward the pipe insertion hole 36A.
B is provided. Then, the air pipe 22 is inserted into the pipe insertion hole 36A through the slit 36B, and in this state, the partition plate 3 is
Fixed to 2. Thus, the sealing plate 36 has a configuration in which the gap between the air pipe 22 and the second notch 32C is closed without a gap, and the gap between the two is airtightly sealed.

Reference numeral 38 denotes a third sealing plate as a sealing member which is provided on the outer peripheral side of the third notch 32D and is detachably fixed to the partition plate 32. The plate 38 is also configured substantially similarly to the first sealing plate 34, and has a pipe insertion hole 38A and a slit 38B.

Then, the third sealing plate 38 is fixed to the partition plate 32 by a plurality of fastening screws 39, closes the air pipe 23 and the third notch 32D without any gap, and hermetically seals the gap therebetween. It is configured to be sealed.

Reference numeral 40 denotes a cover-side seal for hermetically sealing the space between the engine cover 10 and the partition plate 32. The cover-side seal 40 is made of an elastic resin material such as rubber having heat resistance. It is formed as a hollow seal member having a substantially P-shaped cross section which extends in a substantially U-shape along the periphery of 32. Also, the cover side seal 40
The portions bent in the L-shape along the partition plate 32 are bent portions 40A, 40A. The cover-side seal 40 is detachably attached along the peripheral edge of the partition plate 32, and elastically contacts the inner surface of the engine cover 10 with interference.

Further, the radiator 17, oil cooler 20, and intercooler 21 of the heat exchanger 16 are provided with other partitioning devices (not shown) using a rubber seal or the like located on the front side and the rear side, respectively. The configuration is such that the cooling air after passing through the heat exchanger 16 is prevented from flowing toward the air intake 11 together with the partitioning device 31.

The hydraulic excavator according to the present embodiment has the above-described configuration, and the excavator performs an excavating operation on the engine 12 during excavation work.
The cooling fan 13 is rotationally driven by
The outside air becomes the cooling air and the building cover 7 extends from the air intake 11.
It is sucked in. Then, the cooling air flows toward the radiator 17, the oil cooler 20, and the intercooler 21 of the heat exchanger 16, and sequentially cools them.

Also, at this time, the space between the engine cover 10 and the fan shroud 24 is sealed by the partitioning device 31 so that the cooling air passing through the heat exchanger 16 and having a high temperature can be cooled by the engine cover 10 and the fan shroud 2.
4 to the air intake 11 side, so that a so-called reverse flow can be prevented from occurring, and the cooling efficiency of the heat exchanger 16 can be increased.

Next, the partitioning device 31 is connected to the engine cover 10.
An attachment method for attaching between the fan shroud 24 and the fan shroud 24 will be described with reference to FIGS.

First, the cover-side seal 40 is previously attached to the partition plate 3.
2, and in this state, the partition plate 32 is moved downward from above the opening 9A of the building cover 7 toward the fan shroud 24.

As a result, the notches 32 B,
32C and 32D are connected around the cooling water pipe 18 and the air pipe 2
2 and 23, and the notch recess 32A is fitted on the outer peripheral side of the upper portion of the rectangular cylindrical portion 24A of the fan shroud 24. Then, in this state, the partition plate 32 is fastened to the mounting bracket 25 using the fastening bolts 33.

Next, the slit 34B of the first sealing plate 34
The slit 34B is expanded by pulling the sealing plate 34 so as to separate the upper and lower parts vertically, and the pipe insertion hole 34A is fitted to the outer peripheral side of the cooling water pipe 18 through the expanded slit 34B. Then, the tensile force is released, and the cooling water pipe 18 is inserted into the pipe insertion hole 34A. In this state, the sealing plate 34 is fastened to the partition plate 32 using the fastening screw 35.

Also, the second and third sealing plates 36 and 38 are similar to the first sealing plate 34 in that
6A and 38A are fitted to the outer peripheral sides of the air pipes 22 and 23 via the slits 36B and 38B, respectively. In this state, the sealing plates 36 and 38 are fastened to the partition plate 32 by using fastening screws 37 and 39.

As a result, the cooling water pipe 18 and the air pipe 2
Notches 32B, 32C, 32D of partition plate 32
And the notches 32B, 32
The gaps between C, 32D and the pipes 18, 22, 23 can be closed without gaps by the sealing plates 34, 36, 38,
The space between them can be hermetically sealed. Further, the space between the partition plate 32 and the engine cover 10 can be hermetically sealed by the cover-side seal 40.

Thus, in the present embodiment, the partitioning device 3
1, the partitioning device 31 is connected to the engine cover 10 and the heat exchanger 16 while the cooling water pipe 18 and the air pipes 22 and 23 are still attached to the heat exchanger 16.
It can be easily installed and removed between.

Thus, the cooling water pipe 18 and the air pipe 2
It is possible to easily perform the sealing work on the pipes 2 and 23, and it is possible to save the trouble of performing the pipe fitting work and the like together as described in the related art, thereby improving the overall workability. Also, when performing maintenance work on the engine 12, the heat exchanger 16, and the like, the work of attaching and detaching the partition device 31 can be performed smoothly, and work efficiency can be improved.

The partition plate 32 has a cooling water pipe 18,
At the positions corresponding to the air pipes 22 and 23, the first, second and third
The notches 32B, 32C, and 32D are provided, so that the three pipes 18, 22, and 23 can be connected to the first, second, and third pipes only by attaching the partition plate 32 to the fan shroud 24.
Can be simultaneously inserted into the notches 32B, 32C, 32D.

This eliminates the necessity of separately attaching the partition plate 32 to each of the pipes 18, 22, and 23 as described in the prior art, thereby easily performing the attachment and detachment operation of the partition device 31. In addition to this, it is not necessary to prepare a separate partition plate 32 for each of the pipes 18, 22, and 23, and the total number of parts can be reduced.

As described above, the partition plate 32 has the first
Conventionally, the second and third notches 32B, 32C, and 32D are provided, and the first, second, and third sealing plates 34, 36, and 38 are provided with slits 34B, 36B, and 38B. As described in the technology, it is not necessary to use a partition member that is divided into upper and lower parts, so that the number of components can be reduced and the mounting structure of the partition plate 32 and the sealing plates 34, 36, and 38 can be simplified. .

Further, the cooling water pipe 18, the air pipe 22,
23 can be easily routed from the space between the engine cover 10 and the heat exchanger 16 toward the engine 12 via the partitioning device 31, and the layout design of the pipes 18, 22, and 23 can be easily performed. be able to.

Next, FIG. 8 shows a second embodiment of the present invention. In this embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof will be given. It shall be omitted.

The feature of the present embodiment is that the partition plate 32 of the cover-side seal 52 constituting the partitioning device 51 is provided.
Inside the bent portion 52A bent along the corner of
3 is filled.

Here, the partitioning device 51 includes the partitioning plate 32, the first, second, and third sealing plates 34, 36, and 38 and the cover side in substantially the same manner as the partitioning device 31 described in the first embodiment. It is substantially constituted by a seal 52.

The cover-side seal 52 is formed substantially along the partition plate 32 by using a heat-resistant elastic resin material such as rubber, like the cover-side seal 40 according to the first embodiment. It is formed as a hollow seal member extending in a letter shape, and has bent portions 52A, 52A.

However, the cover side seal 52 is
The difference from the first embodiment is that the reinforcing material 53 is filled in the insides of 2A and 52A. The reinforcing material 53 is formed as a bar-shaped body by using, for example, an elastic resin material such as rubber having heat resistance substantially in the same manner as the cover-side seal 52.

As a method of attaching the reinforcing member 53, for example, a small cut is made in the bent portion 52A of the cover side seal 52, and a molten resin (rubber) flows into the bent portion 52A through this cut. After that, it is done by closing the cut.

Thus, also in the present embodiment having such a configuration, it is possible to obtain substantially the same operation and effect as in the first embodiment. Particularly, in the present embodiment, since the reinforcing material 53 is filled in the bent portions 52A, 52A of the cover-side seal 52, the reinforcing material 53 is used.
The bending portion 52A of the cover-side seal 52 can be reinforced with respect to bending stress acting on the bending portion 52A in a concentrated manner, and the durability and life of the cover-side seal 52 can be increased to improve the performance and performance of the partitioning device 51. Reliability can be improved.

Next, FIGS. 9 and 10 show a third embodiment of the present invention. In the present embodiment, the same components as those in the first embodiment are denoted by the same reference numerals. The description is omitted.

However, the feature of the present embodiment is that the projection 64 is provided at a position corresponding to the cover-side seal 63 of the partitioning device 61 in the engine cover 60, so that the concave groove 65 is formed on the inner surface of the engine cover 60. And the cover-side seal 63 is brought into contact with the groove 65.

Here, the partitioning device 61 has substantially the same configuration as the partitioning device 31 described in the first embodiment.
It has a cover-side seal 63 and the like. And the partition plate 6
2, a notch concave portion 62A that fits into the square tube portion 24A of the fan shroud 24, a first notch (not shown) through which the cooling water pipe 18 is inserted, and a second notch through which the air pipe 22 is inserted. A notch 62B and a third notch (not shown) through which the air pipe 23 is inserted are provided.

The protruding portion 64 is formed as a U-shaped protruding portion along the outer surface of the engine cover 60 by performing press working or the like on a position of the engine cover 60 corresponding to the cover-side seal 63. Have been. The inside of the protrusion 64 is a concave groove 65, and the cover-side seal 63 is in contact with the concave groove 65 with a tight allowance.

Thus, also in the present embodiment having such a configuration, it is possible to obtain substantially the same operation and effect as in the first embodiment. In particular, in the present embodiment, the portion of the engine cover 60 where the cover-side seal 63 comes into contact is formed as the concave groove 65, so that the cover-side seal 63 can come into wide contact with the wall surface of the concave groove 65, and the engine cover The contact area of the cover side seal 63 with respect to 60 can be increased, and the sealing performance of the cover side seal 63 can be improved.

Further, the cover 63 can be brought into contact with the cover 63 while being held in the groove 65. For example, even when vibrations during excavation work are transmitted to the cover 63, the engine cover 60 can be covered with the cover 63. The side seal 63 does not swing, and the cover side seal 63 can be kept in stable contact with the engine cover 60.

Further, since the concave portion 65 is formed by partially pressing the engine cover 60, for example, the entire engine cover 60 is formed to be thick and the concave portion 6 is formed.
The height position of the outer surface of the engine cover 60 can be set lower as compared with the case where the base member 5 is formed by cutting or the like, and the rear view from inside the cab 4 can be secured well. Further, the reinforcement of the entire engine cover 60 is
(Concave groove 65).

In the first embodiment, the partition plate 32
Is provided on the fan shroud 24 via the mounting bracket 25 as an example. Alternatively, for example, the L-shaped mounting brackets 25 ′ and 25 ′ may be heated as shown by a dashed line in FIG. By providing the radiator 17 of the exchanger 16, the partition plate 32 may be attached to the radiator 17. This is the same for the second and third embodiments.

In the first embodiment, the cooling water pipe 18 attached to the radiator 17 and the intercooler 2
1, the air pipes 22, 23 are inserted into the notches 32B, 32C, 32D of the partition plate 32 as an example. The pipe may be inserted into a notch provided in the partition plate.

On the other hand, in the present embodiment, a description has been given by taking a hydraulic excavator as an example of a construction machine. However, the present invention is not limited to this, and is applicable to other construction machines such as a hydraulic crane and a wheel-type hydraulic excavator. You may.

[0095]

As described in detail above, according to the first aspect of the present invention, the partition plate constituting the partition means is provided on one of the heat exchanger and the fan shroud, and the partition plate provided on this partition plate is provided. In the notch, the cooling pipe provided in the heat exchanger is inserted, and the gap between the notch and the cooling air pipe is closed by the sealing plate provided in the partition plate. Since the gap between the notches of the partition plate and the cooling pipe can be sealed by a sealing body, the gap between the notch of the partition plate and the cooling pipe can be sealed by the sealing body, and the building cover and the partition plate are sealed. Can be sealed by the cover-side seal, and the sealing performance of the partitioning means can be improved.

When installing the partitioning means, first, a partitioning plate is arranged in the building cover so as to fit around the cooling pipe, and in this state, the partitioning plate is mounted on a fan shroud or the like. By attaching the stop to the partition plate, the partitioning means can be easily attached between the building cover and the heat exchanger while the cooling pipe is still attached to the heat exchanger. As described in the technology, the labor for performing the work of inserting and fitting the cooling pipe and the like can be omitted, and the overall workability can be improved. Further, as described in the related art, it is not necessary to prepare a partitioning unit for each cooling pipe, and the number of components can be reduced as a whole.

According to a second aspect of the present invention, the sealing body is formed by a flat sealing plate having an insertion hole, and the sealing plate has a slit for putting a cooling pipe into and out of the insertion hole. When the sealing body is attached, the slit provided in the sealing body is expanded so that the insertion hole of the sealing body can be easily fitted to the outer peripheral side of the cooling pipe. Thus, the operation of attaching the sealing body can be performed smoothly, and the overall operation efficiency can be further improved.

According to the third aspect of the present invention, the cooling pipe is arranged so as to extend between the engine cover and the fan shroud in the longitudinal direction of the engine.
The cooling pipe can be easily routed from the space between the engine cover and the fan shroud toward the engine side, and the cooling pipe can be smoothly routed.

Further, according to the invention of claim 4, the space between the engine cover and the fan shroud is closed by using a partition plate, and the partition plate has a hollow seal elastically contacting the inner surface of the engine cover. Since the structure is provided with the member, the seal member can be stably contacted along the inner surface of the engine cover, and the gap between the engine cover and the partition plate can be satisfactorily sealed without any gap using the seal member. it can.

Further, according to the fifth aspect of the present invention, since the inside of the seal member is filled with the reinforcing material in the bent portion of the seal member, the bent portion of the seal member is reinforced with the reinforcing material. As a result, the durability of the seal member can be improved.

On the other hand, according to the invention of claim 6, the engine cover is provided with a groove along the portion where the seal member comes into contact. Therefore, the seal member extends over the wall surface of the groove provided on the engine cover. The contact can be made widely, and the sealing performance of the sealing member can be improved.

Further, according to a seventh aspect of the present invention, the cooling pipe comprises:
The radiator-side pipe connecting the radiator and the engine and the intercooler-side pipe connecting the engine and the intercooler are configured. The space between the heat exchanger and the exchanger can be easily routed toward the engine through the cutout of the partition plate, and the layout design of the piping can be easily performed.

[Brief description of the drawings]

FIG. 1 is an external perspective view showing a hydraulic excavator according to a first embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view of the hydraulic excavator when enlarged from a direction indicated by arrows II-II in FIG.

FIG. 3 is an enlarged sectional view of an engine cover, a cooling fan, a fan shroud, a partition device, and the like, which are enlarged from the direction of arrows III-III in FIG.

FIG. 4 is an enlarged sectional view of a fan shroud, a heat exchanger, a partition device, and the like, which are enlarged from a direction indicated by arrows IV-IV in FIG.

FIG. 5 shows an engine cover, a fan shroud,
It is a principal part expanded sectional view which expands and shows a heat exchanger, a partition device, etc.

FIG. 6 shows an engine cover, a fan shroud,
FIG. 3 is an exploded view showing a heat exchanger, a partitioning device and the like in an exploded manner.

FIG. 7 shows an engine cover, a fan shroud,
FIG. 3 is an exploded perspective view showing a heat exchanger and a partitioning device in an exploded manner.

FIG. 8 is a partially broken front view showing a partition plate and a cover-side seal according to a second embodiment of the present invention as a single unit.

FIG. 9 is an external perspective view showing a hydraulic excavator according to a third embodiment of the present invention.

FIG. 10 is an enlarged cross-sectional view of a main part of the engine cover, the fan shroud, the heat exchanger, the partition device, and the like according to the third embodiment, as viewed from the same position as FIG.

[Explanation of symbols]

 3 Revolving frame (frame) 7 Building cover 8 Side cover 9 Top cover 9A Opening 10, 60 Engine cover 11 Air intake 12 Engine 13 Cooling fan 15 Supercharger 16 Heat exchanger 17 Radiator 18 Inlet-side cooling water pipe (cooling) 20 Oil cooler 21 Intercooler 22 Inlet-side air pipe (cooling pipe) 23 Outlet-side air pipe (cooling pipe) 24 Fan shroud 31, 51, 61 Partition device (partition means) 32, 62 Partition plate 32B First Notch 32C, 62B Second notch 32D Third notch 33 Fastening bolt 34 First sealing plate (sealing body) 34A, 36A, 38A Pipe insertion hole 34B, 36B, 38B Slit 36 Second Sealing plate (sealing body) 38 Third sealing plate (sealing body) 40, 52, 63 Cover-side seal 40A 52A bent portion 53 stiffener 65 groove portion

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Nobuyuki Kimura 650, Kandamachi, Tsuchiura-shi, Ibaraki Prefecture Inside the Tsuchiura Plant of Hitachi Construction Machinery Co., Ltd. Inside Tsuchiura Factory

Claims (7)

[Claims] 1. A building cover provided on a frame and having an air intake on one side, an engine located in the building cover and mounted on the frame, and the air intake rotated by the engine and driven by the engine. A cooling fan that supplies cooling air from the cooling fan to the engine side, and a cooling pipe that is provided between the air inlet and the cooling fan and that is provided on the frame and that extends toward the engine side. An exchanger, a fan shroud provided in the heat exchanger and surrounding the cooling fan from outside, and a cooling wind after passing through the heat exchanger, wherein the cooling air flows from between the building cover and the heat exchanger to the air inlet. A partitioning means for preventing backflow toward the side, wherein the partitioning means is provided on one of the heat exchanger and the fan shroud, and And the partition plate having a notch for inserting the a sealing plate for closing a gap between-out the cooling air pipe and the notch provided in the partition cut plate,
A construction machine comprising a cover-side seal provided along the partition plate and sealing between the building cover and the partition plate. 2. The sealing body is a flat sealing plate formed of a heat-resistant elastic material with a size larger than the notch, and the sealing plate includes the cooling pipe. 2. The structure according to claim 1, further comprising: an insertion hole through which a hole is inserted, and a slit extending from the outer surface of the sealing plate toward the insertion hole to move the cooling pipe into and out of the insertion hole. 3. Construction machinery. 3. The engine according to claim 1, wherein the building cover is provided between left and right side covers, and the engine is provided between the left and right side covers.
An upper cover having an opening at a position corresponding to the heat exchanger, and an engine cover provided on the upper cover so as to be openable and closable so as to cover the opening, wherein the cooling pipe is provided with the engine cover and a fan shroud. 3. The construction machine according to claim 1, wherein the construction machine is configured to extend in a length direction of the engine between the engine and the engine. 4. The partition plate is made of a plate material for closing a space between the engine cover and the fan shroud, and the cover-side seal extends along the partition plate and elastically contacts an inner surface of the engine cover. The construction machine according to claim 3, wherein the construction machine comprises a hollow seal member. 5. The construction machine according to claim 4, wherein the inside of the seal member is filled with a reinforcing material at a portion where the seal member bends. 6. The engine cover is provided with a concave groove along a portion where the seal member contacts.
Or the construction machine according to 5. 7. The heat exchanger includes a radiator that cools cooling water from the engine, and an intercooler that cools intake air from a supercharger provided in the engine. 7. A radiator-side pipe connecting the radiator and the engine and an intercooler-side pipe connecting the engine and the intercooler. Construction machinery.