JP2000204590A - Sealing structure of construction machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To ensure good built-up efficiency as well as the stable securement of sealing efficiency of a sealing member fixed to the peripheral surface of an air conditioner in an engine room of a construction machinery. SOLUTION: This sealing structure of a construction machine is equipped with an engine, a cooling fan mounted to the engine, a first cooling device set by meeting the cooling fan, a second cooling device set in parallel with the first cooling device, an engine room storing the engine therein and a sealing member for closing between at least a side section of the first cooling device and a wall surface forming section of the engine room meeting the side section and, at the same time, piping member for supplying and discharging the cooling objective fluid to the second cooling device is made to pass around below the side of the first cooling device. Then, the sealing member includes first sealing members 40a, 40b and 40c fixed to at least the side section of the first cooling device and a second sealing member 41 forming insertion grooves 42 for inserting the piping member and, at the same time, fixing one side to the wall surface forming section, and the first sealing members and second sealing member are so formed that the other side of the second sealing member and upper surface are in a state to adhere to the first sealing members 40a, 40b and 40c.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sealing device for an engine room of a construction machine such as a hydraulic shovel.

[0002]

2. Description of the Related Art FIG. 6 is a plan view of a main part of a construction machine, schematically showing the arrangement of hydraulic excavators, and FIG. 7 is a cross-sectional view of the main part taken along the line AA in FIG. In the drawing, 1 is an upper excavator of a hydraulic excavator, 2 is a cab, 3 is a work attachment, 4 is a counterweight, 5 is an engine, 6 is a hydraulic oil tank, 7 is a fuel tank, 8 is a hydraulic switching valve group, and 9 is a hydraulic switching valve group. Swing motor, 10 a hydraulic pump, 11 a cooling fan, 12 a radiator device, 13 an oil cooler, 14 a sealing member, 15 a cooling air inlet, 16 a cooling air outlet, 17 an engine room, 18 a radiator A chamber 19 is a piping member for communicating the oil cooler with the hydraulic switching valve group 8 and the hydraulic oil tank 6 in an oil path. An introduction pipe 20 for introducing the hydraulic oil to the oil cooler and an outlet pipe 21 for extracting the hydraulic oil from the oil cooler. Having. 22 is an upper frame on which a radiator device and the like are placed, 23 is a frame member, 24
Is a vertical wall, 25 is a front end face of a counterweight, 26 is a guard that covers the upper part of the upper swing body 1, 27 is a mounting member for mounting the radiator device on the upper frame, 28 is a slit, and 29 is a pipe insertion hole. It is. In the hydraulic excavator shown in FIG.
An engine room 17 is provided in front of the engine room 17.
The engine 5 is arranged inside. A cooling fan 11 is arranged in the output shaft direction of the engine 5, and a radiator device 12 for cooling water that cools the engine 5 is arranged facing the cooling fan 11. A hydraulic cylinder (not shown) that discharges from a hydraulic pump 10 disposed on the body 1 and drives a work attachment 3 rotatably connected to the upper swing body 1, a swing motor 9 that swings the upper swing body 1, and not shown An oil cooler 13 for cooling hydraulic oil for operating various hydraulic actuators such as a traveling motor for traveling is arranged. After the cooling fan 11 is rotated by the rotation of the engine, cooling air is introduced from the cooling air inlet 15 and the cooling air is further passed through the oil cooler 13 and the radiator device 12 to cool the cooling water and hydraulic oil. Room 1
The inside of the cooling unit 7 is cooled and discharged from the cooling air outlet 16 to the outside.

The radiator 1 is provided inside the engine room 17.
A radiator chamber 18 is provided on the opposite side of the radiator device 12 from the side where the engine 5 is disposed, which is divided by two devices. The radiator device 12 has a lower side fixed to the upper frame 22, and a side portion (in FIG. 6, a front-rear direction of the hydraulic shovel) and a frame member 23, a vertical wall 24, and a front end face of the counterweight 4, which constitute a wall surface of the engine compartment 17. The seal member 14 (14a, 14b, 14c) is disposed between the seal member 14 and the like 25 and the like. Once the oil cooler 13 is
The cooling air that has passed through the radiator device 12 can be prevented from being returned to the radiator chamber 18 in a heated state by being rewound on the back surface of the radiator device 12, and the seal member 14 exhibits reliable sealing performance. The more the cooling efficiency can be improved.

[0004]

SUMMARY OF THE INVENTION The oil cooler 13
Is connected to an introduction pipe 20 for introducing hot working oil into the oil cooler 13 and an outlet pipe 21 for leading cooled working oil from the oil cooler 13. Since the oil cooler 13 is disposed in the radiator chamber 18, the hydraulic switching valve group 8 is located near the center in the left-right direction of the upper revolving unit 1 and the hydraulic oil tank 6 is located near the radiator chamber 18 due to restrictions on equipment layout. In many cases, the inlet pipe 20 and the outlet pipe 21 need to be guided from the radiator chamber 18 to the engine 5 side from the radiator device 12 in the engine chamber 17. However, as described above, the wall components of the radiator device 12 and the engine room 18 surrounding the radiator device 12 (the frame member 23, the vertical wall 2).
4, the front end face 25 of the counterweight, etc.), the seal member 14 is disposed, so that the inlet pipe 20 and the outlet pipe 21 penetrate the seal member 14.

[0005] The seal member 14 can sufficiently exhibit the above-mentioned effects so as to airtightly separate the radiator chamber 18 from the inside of the engine chamber 17. However, when assembling a hydraulic excavator, the sealing member 14 is required to improve the assembly efficiency. Introductory pipe 2
After disposing the discharge pipe 21 and the radiator device 12, the radiator device 12 having the seal member 14 fixed to the side and the oil cooler 13 temporarily assembled integrally with the radiator device 12 are assembled. As shown in FIG. 7, a slit portion 28 is formed upward from a lower end of a seal member 14a fixed to one side surface of the radiator device 12, and the inlet pipe 20 and the outlet pipe 21 are connected to the slit section 28.
Through the pipe insertion hole 2 formed in the seal member 14a.
9 is positioned.

The seal member 14 is often formed of urethane foam because it is inexpensive and can cope with complicated shapes. A sealing member 14 made of a soft material such as urethane foam is attached and fixed to a side surface of the radiator device 12, and the radiator device 1
When suspending the pipe 2 from above and assembling it into the engine compartment 17, the work of passing the inlet pipe 20 and the outlet pipe 21 through the slit 28 involves a deformation of the seal member 14 a, which is a difficult task, and deteriorates the assemblability. I was letting it. That is, the introduction pipe 20 is inserted into the slit 28 of the seal member 14a.
If the outlet pipe 21 does not enter smoothly, the lower end of the seal member 14a is deformed, and a gap is generated. Further, when the sealing member 14a is attached and fixed to the side surface of the radiator device 12, if the attaching position is shifted even slightly, the inner circumference of the pipe insertion hole 29 and the introduction pipe 20 are removed.
Also, a gap is generated between the outer circumference of the outlet pipe 21 and the outer circumference. As described above, according to the related art, there is a problem also in terms of ensuring stable sealing of the seal member 14 and ensuring good assembly.

[0007]

An engine, a cooling fan attached to the engine, a first cooling device arranged to face the cooling fan, and a cooling device arranged in parallel with the first cooling device. A second cooling device, an engine room accommodating the engine, a sealing member for sealing at least a side portion of the first cooling device, and a wall component of the engine room facing the first cooling device. With
In a construction machine in which a pipe member that sends and discharges a cooling target fluid to and from the second cooling device passes near a lower portion beside the first cooling device, the seal member includes at least the first cooling device. A first seal member fixed to the side portion;
A second sealing member having an insertion groove formed therein for inserting the piping member and having one side surface fixed to the wall surface forming portion, wherein the other side surface and the upper surface of the second sealing member are the first sealing member;
The first seal member and the second seal member were formed so as to be in close contact with the seal member.

According to this, it is sufficient that the pipe insertion groove is formed only in the second seal member, and the position of the pipe member is adjusted in advance on the wall constituting member, and the second seal member is fixed. After the pipe member is inserted into the insertion groove, the first seal member fixed to the side is suspended from above in the engine compartment, so that the pipe member can be easily assembled without worrying about the pipe member, and sufficient sealing performance is ensured. Can be obtained.

If the first cooling device is set as a radiator for engine cooling water, and the second cooling device is set as an oil cooler for cooling hydraulic oil for operating various hydraulic actuators of the construction machine, Can be improved.

Further, the insertion groove formed in the second seal member is formed in an arc shape which opens to the other side surface and surrounds at least a half circumference of the pipe member. Can hold the pipe member alone, and can position the pipe member, so that the assemblability can be improved. If the first seal member is formed of a soft elastic material such as urethane foam, the surface of the first seal member that contacts the pipe member can be brought into close contact with the outer periphery of the pipe member by elastic deformation, and a reliable sealing property is obtained. be able to.

Since the second seal member is formed of an elastic member which is harder than the first seal member, the pipe member can be securely held, and there is no displacement. Sex can be obtained.

[0012]

FIG. 1 to FIG. 4 show an embodiment of the present invention. In each of the drawings, the same reference numerals are given to the same components as those in the related art. FIG. 1 is a main part plan view showing an engine room of a hydraulic shovel. In the figure, 40
Reference numerals a and 40b denote first seal members. FIG. 2 is a cross-sectional view of the hydraulic shovel of FIG. 1 taken along the line BB.
The seal member 42 is a pipe insertion groove. FIG. 3 is a view showing the first seal member 40a, and FIG. 4 is a view showing the second seal member 41.

In the hydraulic excavator shown in FIGS. 1 to 4, cooling air is introduced from a cooling air inlet 15 by a cooling fan 11 and passed through an oil cooler 13 as in the prior art shown in FIGS. The hydraulic oil is cooled, the cooling air is further passed through the radiator device 12 to cool the engine cooling water, the inside of the engine room 17 is further cooled, and discharged from the inside of the engine room 17 through the cooling air outlet 16. Seal members 40 (40a, 40b, 40a, 40b, 40a, 40b, 40)
The radiator chamber 18 is airtightly separated from the engine chamber 17 by being sealed by 40c). Radiator device 1
2 is fixed to the upper frame 22 via a mounting member 27. The cooling air that has passed through the radiator device is wrapped back on the back of the radiator device, and the cooling air that has been warmed after passing through the oil cooler 13 and the radiator device 12 tends to return toward the radiator chamber.
This can be prevented by the zero and second seal members 41, and the cooling efficiency of the oil cooler 13 and the radiator device 12 is not reduced.

The oil cooler 13 has an inlet pipe 20 as a pipe member into which the return oil having heat from the hydraulic switching valve group 8 is introduced, and the hydraulic oil cooled by the oil cooler 13 is supplied to the hydraulic oil tank 6. An outlet pipe 21 which is a pipe member for returning is connected. The first seal member 40a is attached and fixed to the front side of the hydraulic excavator of the radiator device 12, and the lower end opposite to the side attached to the radiator device 12 is cut out stepwise as shown in FIG. ing. Second
The seal member is fixed to a wall component (in the present embodiment, a frame component), and a pipe insertion groove 42 is formed on a surface opposite to the surface fixed to the wall component, that is, on a side facing the first seal member. Have been. The pipe insertion groove 42 is formed in an arc-shaped groove that covers at least a half of the outer circumference of the pipe member (the inlet pipe 20 and the outlet pipe 21) without a gap, and the second seal member 41 is made of a single-foam rubber or the like. Since it is formed of a hard elastic member, the pipe member can be held alone. Piping members (introduction pipe 20 and extraction pipe 2
The area on the circumference that is not covered by the pipe insertion groove 42 of 1) is pressed against the first seal member 40a formed of a soft elastic member such as urethane foam as in the related art,
Due to the elastic deformation of the first seal member 40a, the first seal member 40a contacts the outer periphery of the pipe member without any gap.

The hydraulic shovel configured as described above is assembled as follows. First, the second seal member 41 is fixed to a frame member which is a wall component of the engine room 17. The method of fixing the second seal member may be performed by sticking with an adhesive or the like, but is not limited thereto. Next, the inlet pipe 20 and the outlet pipe 21 which are pipe members are inserted into the pipe insertion groove 42 and positioned. Further, the first seal members 40a and 40b are fixed to the side edges, and the radiator device 12 in which the oil cooler 13 is temporarily assembled is suspended from above and fixed on the mount member 27. At this time, the operator does not need to be aware of the pipe member, and simply lowers the radiator device 12 straight, and the notch 43 of the first seal member 40a is inserted into the second seal member 41, the inlet pipe 20, and the outlet pipe 21. The sealing can be performed tightly.

As described above, according to the present embodiment, the seal member is divided into the first seal member 40a and the second seal member 41, and the portion through which the inlet pipe 20 and the outlet pipe 21 pass is formed by the second seal member.
Since it is formed individually as the seal member 41, it is not necessary to form the first seal member 40a in a complicated shape. After the inlet pipe 20 and the outlet pipe 21 are previously positioned and positioned in the second seal member 41 formed of a hard elastic material, the radiator device 12 to which the first seal member 40a is fixed may be hung down. Since the lower end of the member 40a is not deformed inappropriately and a gap is not generated, and the hard second seal member 41 is brought into contact with the soft first seal member 40a so as to press the same, the both contact with each other. No gap is generated due to the fact that both of the seal members are pressed down and deformed. In addition, since the cutout portion 43 of the first seal member 40a and the portion of the second seal member 41 other than the pipe insertion groove 42 may be formed in a simple shape, they can be easily brought into close contact with each other.
This can also prevent the generation of a gap. That is, in the present embodiment, the sealing property of the sealing member can be ensured, and the assembling property can be further improved.

FIG. 5 shows another embodiment of the present invention, and corresponds to FIG. 1 described above. In the figure,
50a, 50b, and 50c are first seal members, and 51 is a second seal member.
It is a sealing member. According to the present embodiment, the pipe insertion groove 42 ′ that opens upward is formed on the upper surface of the second seal member 51. In this embodiment, the same operation and effect as those of the above-described embodiment can be obtained, but the second seal member 5
When the piping member is positioned and held by itself, it can be held more stably.

[0018]

According to the first aspect of the present invention, it is sufficient that the pipe insertion groove is formed only in the second seal member, and the position of the pipe member is adjusted in advance on the wall constituting member to fix the second seal member. Then, after the pipe member is fitted into the insertion groove of the second seal member, the first seal member fixed to the side is suspended from above in the engine room, so that the pipe member can be easily assembled without worrying about the pipe member. In addition, sufficient sealing properties can be reliably obtained.

According to the second aspect of the present invention, the first cooling device cools a radiator for engine cooling water, and the second cooling device cools hydraulic oil for operating various hydraulic actuators of a construction machine. Since the oil cooler is configured to be capable of assembling, the assemblability of the construction machine can be improved.

According to the third aspect of the present invention, the second seal member can hold the pipe member by itself and can position the pipe member, so that the assemblability can be improved. If the first seal member is formed of a soft elastic material such as urethane foam, the surface of the first seal member that contacts the pipe member can be brought into close contact with the outer periphery of the pipe member by elastic deformation, and a reliable sealing property is obtained. be able to.

According to the fourth aspect of the present invention, since the first sealing member is formed of a harder elastic member, the pipe member can be securely held, and there is no displacement. Reliable sealing performance can be obtained.

[Brief description of the drawings]

FIG. 1 is a main part plan view showing an engine room of a hydraulic shovel according to an embodiment of the present invention.

FIG. 2 is a sectional view of the hydraulic shovel of FIG. 1 taken along line BB.

FIG. 3 is a view showing a first seal member 40a.

FIG. 4 is a view showing a second seal member 41.

FIG. 5 is a view showing another embodiment of the present invention.

FIG. 6 is a main part plan view showing a device arrangement configuration of a conventional hydraulic excavator.

FIG. 7 is a cross-sectional view of a main part as viewed from the AA direction in FIG. 6;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Upper revolving body 3 Work attachment 4 Counter weight 5 Engine 6 Hydraulic oil tank 7 Fuel tank 8 Hydraulic switching valve group 9 Swing motor 10 Hydraulic pump 11 Cooling fan 12 Radiator device 13 Oil cooler 14a, 14b, 14c Seal member 15 Cooling air introduction Port 16 Cooling air outlet 17 Engine room 18 Radiator chamber 19 Piping member 20 Inlet pipe 21 Outlet pipe 22 Upper frame 23 Frame member 24 Vertical wall 25 Counterweight front end face 26 Guard 27 Mount member 28 Slit part 29 Piping insertion holes 40a, 40b , 40c, 50a, 50b, 50c First seal member 41 Second seal member 42, 42 'Piping insertion groove

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2D015 CA02 3D038 AA07 AB09 AC00 AC02 AC11 AC12 AC14 AC23 AC25

Claims (4)

[Claims] 1. An engine, a cooling fan attached to the engine, a first cooling device arranged to face the cooling fan, and a second cooling device arranged in parallel with the first cooling device. A cooling device, an engine room that houses the engine, at least a side portion of the first cooling device,
A sealing member for hermetically sealing a space between the first cooling device and a wall member of the engine room facing the first cooling device; In the construction machine that has passed near the lower part of the first cooling device, the sealing member has a first sealing member fixed to at least a side portion of the first cooling device, and an insertion groove for inserting the piping member. A second seal member having one side surface fixed to the wall surface forming portion, wherein the other side surface and the upper surface of the second seal member are in close contact with the first seal member; A seal structure for a construction machine, wherein a second seal member is formed. 2. The apparatus according to claim 1, wherein the first cooling device is a radiator device for engine cooling water, and the second cooling device is an oil cooler that cools hydraulic oil for operating various hydraulic actuators of a construction machine. The seal structure for a construction machine according to claim 1, wherein 3. The insertion groove formed in the second seal member is formed in an arc shape that opens to the other side surface and surrounds at least a half circumference or more of the pipe member. 2. The seal structure for a construction machine according to 1. 4. The seal structure for a construction machine according to claim 1, wherein the second seal member is formed of an elastic member harder than the first seal member.