JP2002115545A - Cooler device for construction machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To adequately cool a plurality of heat exchangers by a single fan, by modifying a mounting position of the fan generating cooling air to make a large diametric fan adoptable and opposing at least the two heat exchangers directly to the single fan to additionally enlarge its size. SOLUTION: This cooler device comprises a fan support mounting a fan and a fan pulley to freely rotate on the same axial line, a swing arm mounted to freely swivel with this axial line serving as the center to be provided with an idler pulley, and a fixing means for fixing a swivel position of the swing arm, and a fan belt is wound around the fan pulley, the idler pulley, and a crank pulley of an engine, to arrange at least two heat exchangers opposed directly to the fan.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling device for a construction machine, and more particularly, to a structure for disposing a heat exchanger, such as a radiator or the like, which is driven by an engine to generate cooling air, and to which the cooling air flows. .

[0002]

2. Description of the Related Art A typical construction machine, for example, a hydraulic excavator includes a plurality of heat exchangers such as a radiator for cooling water for an engine and an oil cooler for hydraulic oil for a hydraulic device. These heat exchangers are cooled by the flow of cooling air generated by a fan that is rotationally driven by an engine. The heat exchanger and the fan are arranged on the fuselage in several forms described below.

(1) A radiator and an oil cooler are arranged in series: As shown in FIG. 7A, a radiator and an oil cooler are arranged in series in a cooling air path generated by a fan provided in an engine. .

(2) Arrangement of a radiator and an oil cooler in parallel: As shown in FIG. 7B, a radiator is arranged in a cooling air passage of a fan provided in an engine, and an oil cooler is arranged in parallel with the radiator. Is provided with a dedicated fan that is driven to rotate by a hydraulic motor or an electric motor. In this case, a space larger than that shown in FIG. 7A is prepared in a portion where the radiator and the oil cooler of the body are installed.

(3) Another example of arranging a radiator and an oil cooler in parallel: As shown in FIG. 7C, the space of the body where the radiator and the oil cooler are installed is shown in FIG.
The radiator and the oil cooler are arranged in parallel instead of reducing the width of each of the radiators and the oil coolers in the direction shown in FIG.

[0006]

The conventional construction machine cooling device of the above-described type has the following problems to be solved.

(1) Arrangement in series: In the form in which the radiator and the oil cooler are arranged in series as shown in FIG. 7A, a plurality of heat exchangers can be installed in a small space, and the cost is low. There are merits that can be done. However,
The cooling capacity of the heat exchanger installed on the downstream side of the cooling air passage is reduced by heat released from the other heat exchanger.

(2) Parallel arrangement: In the form in which the radiator and the oil cooler shown in FIG. 7 (b) are arranged in parallel, each is cooled by cooling air generated by a dedicated fan. The cooling capacity is not affected by each other. However, the cost of the cooling device increases because a fan driven by oil pressure or electricity is provided for the oil cooler. Also, since a large installation space is required, it is easy to apply when there is enough space in the body, but it cannot be implemented when the space is small.

(3) Another example of parallel arrangement: The configuration in which the radiator and the oil cooler shown in FIG. 7 (c) are arranged in parallel by changing the shape thereof is more heat than the series configuration shown in FIG. 7 (a). Since the amount of air flowing through each of the exchangers is halved, it is difficult to secure the cooling capacity even if the thickness of the heat exchanger in the direction in which the cooling air flows is increased. Increasing the fan speed to increase the air flow increases fan noise and construction machine noise. Further, since the fan is provided substantially at the center of the engine, it is difficult to increase the diameter of the fan to increase the air flow.

[0010] The present invention has been made in view of the above facts, and the main technical problem is to improve the mounting position of a fan that generates cooling air so that a large diameter fan can be adopted. Two heat exchangers are directly opposed to one fan, and the size thereof can be increased, so that a plurality of heat exchangers can be appropriately cooled by one fan, An object of the present invention is to provide a cooling device for a construction machine.

[0011]

According to the first aspect of the present invention, there is provided a single fan that is driven by an engine to generate cooling air, and the fan and the fan pulley are rotatably mounted on the same axis. A fan support, a swing arm attached to the fan support so as to be swingable about the rotation axis of the fan, an idler pulley rotatably attached to the swing arm, and a swing position of the swing arm. Fixing means for fixing, a fan belt wound around the fan pulley and the idler pulley and between the idler pulley and the crank pulley of the engine, each of which is disposed directly opposite to the fan and through which the cooling air flows. And a cooling device for a construction machine, comprising at least two heat exchangers.

The position of the fan pulley with respect to the crank pulley can be arbitrarily set by freely setting the mounting position of the fan support on which the swing arm having the idler pulley is mounted. Can be arranged in parallel and upsized.

According to a second aspect of the present invention, in the cooling device for a construction machine according to the first aspect, the fixing means adjusts the swing position of the swing arm.

Further, the position of the fan pulley with respect to the crank pulley is easily set, the common use of the cooling device between similar models is enabled, and the swinging position is adjusted to be used as a fan belt tensioning device. Be able to use.

According to a third aspect of the present invention, there is provided a fan which is driven to rotate by an engine to generate cooling air, a fan support having the fan and a fan pulley rotatably mounted on the same axis. A belt pulling means attached to the fan support and having an idler rotatably and abutted on the fan belt with a predetermined force; a fan belt wound around the crank pulley of the engine and the fan pulley; And at least two heat exchangers disposed directly opposite the fan and through which the cooling air flows.

The position of the fan pulley with respect to the crank pulley can be arbitrarily set by freely setting the mounting position of the fan support having the idler pulley and the belt tensioning means. Enables arrangement and upsizing.

According to a fourth aspect of the present invention, in the cooling device for a construction machine according to any one of the first to third aspects, the fan support is mounted on a frame of a body of the construction machine. It is.

A fan shroud that covers the fan outer diameter and the fan in the shape of a wind tunnel while arbitrarily setting a mounting position of the fan and preventing a relative change between the heat exchanger mounted on the body and the fan. The chip clearance, which is a gap between the two, can be set small, the flow of cooling air can be made efficient, and the amount of cooling air can be increased.

[0019]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a hydraulic excavator for a construction machine according to the present invention. I do.

Referring to FIG.
The hydraulic excavator shown by the symbol
An upper revolving body 6 is supported on the upper revolving body 6 so as to be freely rotatable, and a working device 8 is attached to the upper revolving body 6 so as to be vertically swingable. The revolving superstructure 6 has a revolving superstructure frame 6a
A cab 6b as an operator's cab, an engine room 6c in which heat exchangers such as an engine and a radiator are stored, and a counterweight 6d are mounted.

Referring to FIG. 2 and FIG. 3, a cooling device 10 of a hydraulic excavator 2 is a radiator 1 of an engine cooling water which is driven by an engine 12 and is a heat exchanger.
A fan 18 for generating cooling air flowing through the oil cooler 16 of the hydraulic fluid 4 and the hydraulic device; a fan support 22 in which the fan 18 and the fan pulley 20 are rotatably mounted on the same axis 21; , A swing arm 24 rotatably mounted on the rotation axis 21 of the fan 18, idler pulleys 26 a and 26 b rotatably mounted on the swing arm 24, and a fixed position for fixing the swing position of the swing arm 24. Means 28. Fan pulley 20 and idler pulley 26
a, and a fan belt 32 between the idler pulley 26b and the crank pulley 30 of the engine 12, respectively.
The radiator 14 and the oil cooler 16 are disposed directly opposite to the fan 18 respectively.

The engine 12 is composed of, for example, a well-known diesel engine, and is attached to the revolving frame 6a via a well-known cushioning member 34. Crank pulley 30
Is a fan belt 3 on the crankshaft of the engine 12.
It is connected with an annular groove having a V-shaped cross section for hanging around 2b.

A fan support 22 for supporting the fan 18
Like the radiator 14 and the oil cooler 16, is mounted on a revolving body frame 6a which is a frame of the machine body (these mountings will be described later in detail).

The radiator 14 and the oil cooler 16 are well-known heat exchangers. The width and height defining each front surface area are formed as large as possible in the space of the upper swing body 6 in relation to the arrangement position of the fan 18 described later. The radiator 14 and the oil cooler 16
The mounting bracket 36 is integrally mounted on the revolving frame 6a by bolts 38.

The fan support 22 is integrally formed by welding steel members to each other. That is, the main plate 22b is erected on the bottom plate 22a,
2a and a main plate 22b, a reinforcing plate 22c
Are attached, and extend from the upper end of the main plate 22b in a direction away from the crank pulley 30, and the fixing means 2
8 (the fixing means 28 will be described later in detail) is provided with a support plate 22d. A cylindrical boss 22e is erected on the upper end side of the center of the main plate 22b so as to penetrate the main plate 22b, and a shaft 40 penetrating the boss 22e is rotatably mounted around the axis 21 via a bearing member. Have been. Fan 18 at one end of shaft 40
However, a fan pulley 26a is attached to the other end. A swing arm 2 is provided on the outer periphery of a portion of the boss 22c protruding from the main plate 22b toward the fan pulley 26a.
4 is formed with a mounting portion for rotatably mounting the shaft 4 about the axis 21.

The fan support 22 has a distance L1 between the axis 21 and the rotation center of the crank pulley 30 of the engine 12, and a bottom plate 22a attached to the revolving frame 6a by bolts 42. The dimension L1 is
It is set based on the space of the engine room 6c, the size of the fan 18, the sizes of the radiator 14 and the oil cooler 16, and the like.

Referring to FIG. 4 together with FIG. 2 and FIG. 3, the swing arm 24 is formed by integrally welding steel members to each other, and is an arm main body 24a formed of a plate and having a rectangular shape. A cylindrical boss 24b attached to one end thereof and rotatably fitted to an outer peripheral portion of a boss 22e of the fan support 22, and an idler pulley 26 provided at the other end.
and an idler pulley support mechanism 25 for rotatably supporting a and 26b. Thus, swing arm 2
Numeral 4 is attached so as to be swingable about the rotation axis 21 of the fan 18.

The idler pulley support mechanism 25 has a shaft 25a having a boss with a screw hole at one end, and a bolt rotatably penetrated by a plate member 25b provided at the tip of an arm body 24a of the swing arm 24. 25c and a slot hole 25d formed in the arm body 24a in the longitudinal direction thereof and through which the shaft of the shaft 25a is inserted. The shaft 25a is inserted into the slot hole 25d by bringing the neck of the boss having a screw hole into contact with the arm main body 24a, and idler pulleys 26a and 26b are rotatably mounted on the protruding portions. Is screwed. Thus, by rotating the bolt 25c, the idler pulley 26 which is the axis of the shaft 25a is rotated.
The distance between the rotation axis 27 of a and 26b and the rotation axis 21 of the fan pulley 20 can be freely adjusted. Each of the idler pulleys 26a and 26b has an annular groove having a V-shaped cross section for hanging the fan belts 32a and 32b.

The fixing means 28 is composed of a rod 28a having male threads formed at both ends and a ball joint 2 having female threads formed to be screwed to male threads at both ends of the rod 28a.
8b and 28b. Ball joint 28
One of b and 28b is attached to an end of the swing arm 24 to which the idler pulleys 26a and 26b are attached, and the other is attached to a support plate 22d of the fan support 22. Male screw of rod 28a and ball joint 2
By changing the engagement length of the female screw 8b, the swing position of the swing arm 24 is freely adjusted, and the dimension L2 between the shafts of the idler pulleys 26a and 26b and the crank pulley 30 is adjusted and fixed. The dimension L2 is the dimension L1 between the fan pulley 20 and the crank pulley 30, the space in the engine room 6c, and the fan belt 3
It is set based on the installation space of 2b and the like.

The fan pulley 20 and the idler pulley 26a
And the fan belt 32b wound between the idler pulley 26b and the crank pulley 30 are well-known with a V-shaped cross section. Further, the fan 18 itself is a well-known one.

Referring mainly to FIG. 2, a fan shroud 44, which is a cylindrical wind tunnel, is provided between the fan 18 and the radiator 14 and the oil cooler 16 arranged directly opposite to the fan 18. 14 and an oil cooler 16. The fan shroud 44 is formed in a tubular shape that connects to a round hole portion corresponding to the outer diameter of the fan 18 and a rectangular portion attached to the outer peripheral portions of the radiator 14 and the oil cooler 16. A tip clearance T which is a radial gap between the outer diameter tip of the fan 18 and the round hole of the fan shroud 44.
Are defined to the minimum as long as they do not interfere with each other.
Fan support 2 for supporting fan 18 as described above
2. Since the radiator 14 and the oil cooler 16 are directly mounted on the same revolving frame 6a without a buffer member or the like, the outer diameter of the fan 18 and the fan shroud 44
And there is no relative variation, and the chip clearance T can be set small.

Thus, the radiator 14 and the oil cooler 16 are disposed in parallel directly opposite to the fan 18, respectively, and are rotated by the crank pulley 30 of the engine 12 via the fan belts 32b and 32a. Both are simultaneously cooled by the generated cooling air.

The operation of the cooling device 10 for a construction machine as described above will be described with reference to FIGS.

(1) Fan mounting position and fan size:
The mounting position of the fan support 22 for supporting the fan 18 and the swinging position of the swing arm 24 can be appropriately set with respect to the position of the crank pulley 30 of the engine 12 that drives the fan 18 to rotate. The position and the size of the fan 18 can be freely set. Therefore, a fan with a larger diameter can be installed as compared with the conventional case.

(2) Heat exchanger: Since the setting position of the fan 18 can be freely set, the front area of at least two heat exchangers, the radiator 14 and the oil cooler 16 is made larger than that of the conventional one, and one large diameter Each of them can be arranged to face the fan 18.

(3) Cooling air loss: The fan support 22, the radiator 14, and the oil cooler 16 for supporting the fan 18 are mounted on the revolving frame 6a, which is the same machine frame, so that the outer diameter of the fan 18 and the fan shroud 44 are provided. Can be minimized, the loss of the cooling air path can be reduced, and the air volume can be increased. Further, since the front areas of the two heat exchangers, the radiator 14 and the oil cooler 16 can be made larger than before, the pressure loss (air passage pressure loss) when the cooling air passes through the heat exchanger is also reduced.

(4) Cooling capacity: Therefore, the radiator 14 and the oil cooler 16 can be appropriately cooled. Further, since the fan 18 having a large diameter can be used, it is possible to increase the amount of cooling air by lowering the number of rotations of the fan without increasing the number of rotations of the fan, that is, the noise of the fan. The required cooling capacity can be secured without increasing the size, and the cost of the cooling device can be reduced and the body of the construction machine can be made compact.

(5) Swing arm: swing arm 2
No. 4 can be used in common among different types of construction machines by changing the dimension L2 which is the fixed position.
Further, the swing position of the swing arm 24 can be determined so as to avoid a structure in the body. Further, the swing arm 24 can be used as a belt tensioning device that adjusts the tension of the fan belt 32b by adjusting the swing position.

(6) Engine vibration: fan support 22
Radiator 14 and oil cooler 16 as heat exchangers
Is directly attached to the revolving frame 6a, and the engine 1
2 is mounted on the revolving frame 6a via the buffer member 34, so that the fan 18 and the engine 12 have different vibration modes.
It is absorbed by the fan belt 32b looped between the zero and the idler pulley 26b.

Next, another embodiment of a cooling device for a construction machine will be described with reference to FIGS. In FIGS. 5 and 6, substantially the same parts as those in FIGS. 1 to 4 are denoted by the same reference numerals. The description is omitted except where necessary to avoid duplication.

The cooling device, generally designated by reference numeral 50, is a single fan 18 which is driven by the engine 12 to generate cooling air flowing through the radiator 14 of the engine cooling water, which is a heat exchanger, and the oil cooler 16 for the hydraulic oil of the hydraulic device. A fan support 52 on which the fan 18 and the fan pulley 20 are rotatably mounted on the same axis 21; a fan belt 54 wound around the crank pulley 30 and the fan pulley 20 of the engine 12; A belt tightener 56 is attached to the fan support 52 with an idler 56a rotatably and abutted with a predetermined force on the fan 54. The radiator 14 and the oil cooler 16 are directly connected to the fan 18 respectively. They are arranged facing each other. The fan support 52 is attached to the revolving body frame 6a, which is the body frame, similarly to the radiator 14 and the oil cooler 16.

The fan support 52 is integrally formed by welding steel members to each other. That is, a pair of plates 52b, 52b are erected at intervals on the bottom plate 52a, and a main plate 52c is provided between the plates 52b, 52b at the upper end side. A cylindrical boss 52d is provided upright at the center of the main plate 52c so as to penetrate the main plate 52c, and a shaft 40 penetrating the boss 52d is mounted rotatably about the axis 21 via a bearing member. I have. The fan 18 is attached to one end of the shaft 40, and the fan pulley 20 is attached to the other end.

The fan support 52 has a distance L1 between the axis 21 and the center of rotation of the crank pulley 30 of the engine 12, and a bottom plate 52a attached to the revolving frame 6a with bolts 42. The dimension L1 is
It is set based on the space of the engine room 6c, the size of the fan 18, the sizes of the radiator 14 and the oil cooler 16, and the like.

The belt tightener 56 is a well-known device that automatically tensions the belt, that is, automatically applies a predetermined tension to prevent the belt from becoming loose. Belt tightener 56
Includes a main body 56b, a swing arm 56c having one end attached to the main body 56b so as to be swingable about an axis X (FIG. 6).
An idler 56a rotatably attached to the other end of the swing arm 56c. The swing arm 56c is connected to the main body 56b.
Arrow Z by a spring (not shown)
The fan belt 54 shown in FIG. 6 is constantly urged by a predetermined force in a direction extending from the inside to the outside. Main body 56b
Is the fan 1 on the main plate 52c of the fan support 52.
8 is fixed and mounted above the mounting axis 21 by means such as bolts (not shown).

Thus, the radiator 14 and the oil cooler 16 are disposed in parallel directly opposite to the fan 18, respectively, and are rotated by the crank pulley 30 of the engine 12 via the fan belt 54.
Both are cooled simultaneously by the cooling air generated by.

With reference to FIGS. 5 and 6, the operation of the cooling device 50 of the construction machine as described above will be described.

(1) Fan mounting position and fan size:
The mounting position of the fan support 52 that supports the fan 18 can be appropriately set with respect to the position of the crank pulley 30 of the engine 12 that drives the fan 18 to rotate. Therefore, the mounting position of the fan 18 and the size of the fan 18 are reduced. Can be set freely. Therefore, a fan with a larger diameter can be installed as compared with the conventional case.

(2) Heat exchanger: Since the mounting position of the fan 18 can be freely set, the front area of at least two heat exchangers, the radiator 14 and the oil cooler 16 is made larger than before, and one large diameter Can be arranged to face each other.

(3) Cooling air loss: The fan support 52 for supporting the fan 18, the radiator 14, and the oil cooler 16 are mounted on the revolving frame 6a, which is the same machine frame, so that the outer diameter of the fan 18 and the fan shroud 44 are provided. Can be minimized, the loss of the cooling air path can be reduced, and the air volume can be increased. Further, since the front areas of the two heat exchangers, the radiator 14 and the oil cooler 16 can be made larger than before, the pressure loss (air passage pressure loss) when the cooling air passes through the heat exchanger is also reduced.

(4) Cooling capacity: Therefore, the radiator 14 and the oil cooler 16 can be appropriately cooled. Further, since the fan 18 having a large diameter can be used, it is possible to increase the amount of cooling air by lowering the number of rotations of the fan without increasing the number of rotations of the fan, that is, the noise of the fan. The required cooling capacity can be secured without increasing the size, and the cost of the cooling device can be reduced and the body of the construction machine can be made compact.

(5) Engine Vibration: Fan Support 52
Radiator 14 and oil cooler 16 as heat exchangers
Is directly attached to the revolving frame 6a, and the engine 1
2 is attached to the revolving body frame 6a via the buffer member 34, so that the form of vibration differs between the fan 18 and the engine 12, but this difference in vibration is caused by the difference between the crank pulley 30 and the fan pulley 20. The fan belt 54 that has been hung around and the belt tensioning means 56 absorbs it by auto-tension. The cooling device 50 is particularly effective when the dimension L1 (FIG. 6) between the fan pulley 20 and the crank pulley 30 is small and the length of the fan belt 54 is relatively short.

As described above, the present invention has been described in detail based on the embodiments. However, the present invention is not limited to the above-described embodiments. It can be changed or modified.

(1) Attach the fan support to the engine:
In the embodiment of the present invention, the fan 18 is installed at a distance L1 from the crank pulley 30 of the engine 12 by the fan support 22 or the fan support 52 attached to the revolving frame 6a.
A fan support may be attached to the engine 12 depending on the structure of the construction machine, the size of the heat exchanger, and the like. In this case, since the relative position varies between the heat exchanger attached to the body frame 6a and the fan provided to the engine 12 attached to the body frame 6a via the buffer member, the chip between the fan and the fan shroud is changed. The clearance T is set large in consideration of this.

(2) Means for fixing swing arm: In the embodiment of the present invention, the means 28 for fixing the swinging position of the swing arm 24 in the cooling device 10 allows the position of the swing arm 24 to be adjusted. , Rod 28a
And ball joints 28b and 28 screwed to both ends thereof
b, but when the position does not need to be adjusted,
The swing arm 24 may be directly fixed to the fan support 22 with bolts or the like.

(3) Belt tightening means: In the embodiment of the present invention, a belt tightener 5 is used as the belt tightening means.
6, but it goes without saying that another appropriate belt tension mechanism may be used.

[0056]

According to the cooling device for a construction machine constructed in accordance with the present invention, a large-diameter fan can be adopted by improving a mounting position of a fan for generating cooling air, and at least two fans are provided. Cooling of construction machinery, in which the heat exchanger is directly opposed to one fan and its size can be increased, and a plurality of heat exchangers can be appropriately cooled by one fan. An apparatus is provided.

[Brief description of the drawings]

FIG. 1 is a side view of a hydraulic excavator which is a typical construction machine equipped with a cooling device for a construction machine constructed according to the present invention.

FIG. 2 is a partially enlarged cross-sectional view of the upper swing body shown in the direction of arrows AA in FIG. 1 (the illustration of the fixing means and the idler pulley support mechanism is omitted).

FIG. 3 is a front view of the cooling device shown in the direction of arrows BB in FIG. 2;

FIG. 4 is a side view of a part of the swing arm shown in the direction of arrows CC in FIG. 3;

FIG. 5 is a partially enlarged cross-sectional view of the upper-part turning body, showing another embodiment viewed in the direction of arrows AA in FIG. 1;

FIG. 6 is a front view of the cooling device shown in the direction of the arrow DD in FIG. 5;

7A and 7B are explanatory diagrams of a conventional cooling device installation mode in an upper swing body of a hydraulic shovel, wherein FIG. 7A illustrates a mode in which a radiator and an oil cooler are installed in series, and FIG. (C) shows another embodiment in which a radiator and an oil cooler are arranged in parallel.

[Explanation of symbols]

 2: Hydraulic excavator (construction machine) 6: Upper revolving body 6a: Revolving body frame (body frame) 10: Cooling device 12: Engine 14: Radiator (heat exchanger) 16: Oil cooler (heat exchanger) 18: Fan 20 : Fan pulley 22: Fan support 24: Swing arm 26 a: Idler pulley 26 b: Idler pulley 28: Fixing means 30: Crank pulley 32 a: Fan belt 32 b: Fan belt 50: Cooling device 52: Fan support 54: Fan belt 56: Belt Tightener 56a: Idler

Claims (4)

[Claims] 1. A fan that is rotated by an engine to generate cooling air, a fan support in which the fan and a fan pulley are rotatably mounted on the same axis, and a rotation axis of the fan attached to the fan support. A swing arm pivotally mounted on the swing arm, an idler pulley rotatably mounted on the swing arm, fixing means for fixing the swing position of the swing arm, the fan pulley, the idler pulley, and the A fan belt wound around each of the idler pulley and the crank pulley of the engine, and at least two heat exchangers each disposed directly opposite the fan and through which the cooling air flows. A cooling device for a construction machine, comprising: 2. The cooling device for a construction machine according to claim 1, wherein said fixing means adjustably positions a swing position of said swing arm. 3. A single fan that is rotated by an engine to generate cooling air, a fan support in which the fan and the fan pulley are rotatably mounted on the same axis, a crank pulley of the engine and the fan pulley. A fan belt that is hung between the fan belt, a belt tensioning means attached to the fan support having an idler rotatably and with a predetermined force on the fan belt, each of which directly faces the fan; A cooling device for a construction machine, comprising: at least two heat exchangers disposed and through which the cooling air flows. 4. The cooling device for a construction machine according to claim 1, wherein the fan support is attached to a body frame of the construction machine.