JP2017160748A - Construction machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a construction machine in which favorable heat balance in a control box can be secured even if the control box is arranged in a place where temperature becomes high.SOLUTION: There is provided a construction machine, for example, a super-large hydraulic shovel that comprises: a revolving structure 2; a working device 3 attached to the revolving structure 2; a control box 14 which is mounted to the revolving structure 2 and has a control instrument performing various control processing; and a machine room 6 stored the control box 14. The construction machine further comprises: a cover member 20 which is arranged in the machine room 6, and covers the control box 14 via a prescribed clearance 19; and an air introduction device including a fan 23 or the like for introducing air from the outside of the machine room 6 into the cover member 20, and discharging the introduced air to the outside of the cover member 20.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a construction machine including a control box having a control device that performs various control processes.

  This type of prior art is disclosed in Patent Document 1. Patent Document 1 discloses a work vehicle such as a small hydraulic excavator provided with a control box. The control box provided in the work vehicle includes a control device, a mounting plate that supports the control device, and a control device. And a control cover for covering.

  The control cover is formed with an opening for sucking and exhausting air, and the mounting plate is formed with a long hole for exhausting heat generated inside the control box. By exhausting the heated air inside the control box through the opening of the control cover and the long hole of the mounting plate, the heat balance inside the control box is kept good, and the inside of the control box The control equipment is protected.

JP 2010-229739 A

  In a construction machine, it may happen that the control box has to be placed at a high temperature place due to restrictions on various parts placement areas. However, when the control box shown in Patent Document 1 is arranged at a high temperature, the heat balance inside the control box cannot be maintained in a good state by heating the control cover. In such a case, there is a possibility that the control device arranged inside the control box may be damaged by heating.

  In order to solve the above-described problems, an object of the present invention is to provide a construction machine that can ensure a good heat balance inside the control box even when the control box is placed at a high temperature. .

  In order to solve the above-described problems, a construction machine according to the present invention includes a main body, a working device attached to the main body, a control box having a control device mounted on the main body and performing various control processes, and the control box. In a construction machine including a storage chamber in which the control box is stored, a cover member that is disposed inside the storage chamber and covers the control box through a predetermined gap, and air outside the storage chamber is supplied to the cover member. And an air guide device that guides the air inside and exhausts the guided air to the outside of the cover member.

  According to the construction machine of the present invention, the air outside the storage chamber is guided to the predetermined gap provided between the cover member and the control box by the wind guide device, so that the heat insulating region is formed in the predetermined gap portion. Can be formed. Further, the control box can be directly cooled by the air in the storage chamber guided to the predetermined gap. As a result, the present invention can ensure a good heat balance inside the control box, which has been difficult in the past, even when the control box is placed at a high temperature. Can be protected from.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view showing a very large hydraulic excavator constituting a first embodiment of a construction machine according to the present invention. It is the top view which showed typically the machine room part of 1st Embodiment. It is the rear view which showed typically the state which looked at 1st Embodiment from the counterweight side. It is the top view which showed typically the principal part structure of 1st Embodiment. It is AA sectional drawing of FIG. It is the top view which showed typically the principal part structure of 2nd Embodiment of this invention. It is BB sectional drawing of FIG. It is the top view which showed typically the principal part structure of 3rd Embodiment of this invention. It is the top view which showed typically the principal part structure of 4th Embodiment of this invention. It is CC sectional drawing of FIG.

  Embodiments of a construction machine according to the present invention will be described below with reference to the drawings.

  As shown in FIGS. 1-3, 1st Embodiment of the construction machine which concerns on this embodiment is comprised by the ultra-large hydraulic excavator, for example. This super-large hydraulic excavator is disposed on the traveling body 1, the revolving body 2 that forms the main body, and is attached to the revolving body 2 so as to be rotatable in the vertical direction. And a working device 3 for performing.

  A cab 4 provided with a driver's seat is disposed at the front position of the revolving structure, and a counterweight 5 is disposed at the rear position. A machine room 6 is disposed between the cab 4 and the counterweight 5.

  An engine 10 and a hydraulic pump 11 driven by the engine 10 are arranged in the machine room 6. Due to heat generated by the engine 10, the inside of the machine room 6 becomes a high temperature environment. In addition, a heat exchanger 12 that cools engine cooling water and the like and a cooling fan 13 that generates air for cooling the heat exchanger 12 are disposed inside the machine room 6. Further, a control box 14 having control devices for performing various control processes is arranged inside the machine room 6 which is a place where the temperature is high. The machine room 6 constitutes a storage room in which the control box 14 is stored.

  As shown in FIGS. 4 and 5, the present embodiment is arranged inside the storage room, that is, the machine room 6, and covers, for example, a box shape that covers the upper surface and three side surfaces of the control box 14 via a predetermined gap 19. A cover member 20 is provided. The remaining one side surface of the cover member 20 is an open surface that faces the side wall of the machine room 6. The cover member 20 is fixed to the side wall of the machine room 6, for example. The lower end of the cover member 20 is in contact with the floor 24 of the machine room 6.

  In the present embodiment, air outside the machine room 6 is guided to the inside of the cover member 20, that is, a predetermined gap 19 provided between the cover member 20 and the control box 14, and the guided air is guided to the cover member 20. It has a wind guide device that discharges to the outside.

  For example, a plurality of wind guide devices are formed in the vertical direction on the side wall of the machine chamber 6 facing the open surface of the cover member 20, and the introduction side opening 6 a that guides air outside the machine chamber 6 to the inside of the cover member 20. And a discharge side opening 20b formed in the cover member 20 for discharging the guided air, and a fan 23 provided in the discharge side opening 20b for discharging the air guided into the cover member 20. ing.

  A plurality of introduction-side openings 6a are provided with air guide plates 26 that prevent foreign matters such as dead leaves from entering the cover member 20. The discharge side opening 20b is formed at a position facing the upper portion of the control box 14, for example.

  The fan 23 is driven by an electric motor 22 that is operated by, for example, battery power (not shown) guided through the signal line 21.

  In the present embodiment, a bracket 25 that is provided inside the cover member 20 and supports the control box 14 is provided.

  In the first embodiment configured as described above, the fan 23 is driven by the electric motor 22, so that the air outside the machine room 6 is guided as shown by arrows 27, 28, and 29 in FIGS. 4 and 5. It is led into the inside of the cover member 20 from the plate 26 and the introduction side opening 6a, that is, led to a predetermined gap 19 between the cover member 20 and the control box 14, and is discharged into the machine chamber 6 from the discharge side opening 20b. The

  That is, according to the present embodiment, air outside the machine room 6 is placed between the cover member 20 and the control box 14 by the air guide device including the introduction side opening 6a, the discharge side opening 20b, the fan 23, and the like. By being guided to the predetermined gap 19 provided, a heat insulating region can be formed in a portion of the predetermined gap 19. Further, the control box 14 can be directly cooled by the air outside the machine room 6 guided to the predetermined gap 19.

  Accordingly, the first embodiment can secure a good heat balance inside the control box 14 even when the control box 14 is arranged in the machine room 6 which is a place where the temperature becomes high, and is arranged inside the control box 14. A control device (not shown) can be protected from high temperatures.

  In the first embodiment, the air guide plate 26 is provided at the position of the introduction side opening 6a. However, in place of the air guide plate, a net-like body capable of preventing entry of foreign matters such as dead leaves is provided. May be.

  Moreover, in 1st Embodiment, although the electric motor 22 which act | operates with the electric power of a battery is provided as a drive part of the fan 23 contained in an air guide apparatus, the drive part which drives the fan 23 was discharged from the hydraulic pump. You may comprise with the hydraulic motor act | operated by pressure oil.

  In the second embodiment of the present invention shown in FIGS. 6 and 7, the entire cover member 20 is formed in a box shape that covers the upper surface, the lower surface, and the side surface of the control box 14, and the cover member is formed on the side wall of the machine room 6. A passage for communicating the inside of the machine 20 with the outside of the machine room 6, for example, a metal duct 30 is provided. A bracket 32 is provided on the floor 24 of the machine room 6 and supports the cover member 20. As shown in FIG. 7, a heat insulating material 31 is attached to the inner surface of the cover member 20.

  The discharge side opening 20b of the cover member 20 is formed at a position facing the lower portion of the control box 14, for example. Other configurations are the same as those of the first embodiment.

  In the second embodiment configured as described above, the fan 23 is driven by the electric motor 22, so that the air outside the machine room 6 is ducted as indicated by arrows 27, 28 and 29 in FIGS. 6 and 7. 30 is guided to a predetermined gap 19 between the cover member 20 and the control box 14 through the opening 30a, and is discharged into the machine chamber 6 through the discharge side opening 20b. Thereby, an effect equivalent to that of the first embodiment can be obtained.

  Further, in the second embodiment, the bottom of the cover member 20 is separated from the floor 24 of the machine room 6 by the bracket 32, thereby preventing the heat of the floor of the machine room 6 from being directly transmitted to the cover member 20.

  Moreover, since the heat insulating material 31 is stuck inside the cover member 20, a more excellent heat insulating effect on the control box 14 can be obtained.

  In addition, in 2nd Embodiment, although the metal duct 30 was provided as a channel | path which connects the inside of the cover member 20 and the exterior of the machine room 6, it replaces with the metal duct 30, and the hose which can be bent and deformed is used. You may make it the structure provided. When such a hose is provided, the arrangement position of the control box 14 inside the machine room 6 can be set relatively freely.

  In the third embodiment of the present invention shown in FIG. 8, a fan 35 for sucking air outside the machine room 6 is provided in the introduction side opening 6a formed in the side wall of the machine room 6 included in the air guide device, and the cover The discharge side opening 20b formed in the member 20 is not provided with a fan. The fan 35 is driven by an electric motor 34 that is operated by electric power of a battery (not shown) connected to the signal line 33. Other configurations are the same as those of the first embodiment.

  In the third embodiment configured as described above, when the fan 35 is driven by the electric motor 34, the air outside the machine room 6 is introduced into the introduction side opening 6a as indicated by arrows 36, 37, and 38 in FIG. Then, it is guided to a predetermined gap 19 between the cover member 20 and the control box 14 and discharged into the machine chamber 6 through the discharge side opening 20b. The third embodiment configured as described above can achieve the same effect as the first embodiment.

  The introduction-side opening 6a is provided at a position facing the lower part of the control box 14, and the discharge-side opening 20b is opposed to the side surface position of the cover member 20 facing the upper part of the control box 14 or the upper surface of the control box 14. The cover member 20 may be provided on the upper surface of the cover member 20, the introduction side opening 6a is opposed to the upper part of the control box 14, and the discharge side opening 20b is opposed to the lower part of the control box 14. You may provide in a position.

  In the fourth embodiment of the present invention shown in FIGS. 9 and 10, the fan shroud 40 in which the cooling fan 13 for generating the air for cooling the heat exchanger 12 is installed is used for cooling the control box 14. .

  That is, the air guide device provided in the fourth embodiment is formed on the side wall of the machine room 6 facing the open surface of the cover member 20, and the introduction side opening 6a through which air outside the machine room 6 is guided, A discharge side opening 20b that is formed in the cover member 20 and discharges the guided air, and a passage that guides the air discharged from the discharge side opening 20b to the inside of the fan shroud 40, that is, a discharge side opening of the cover member 20 A passage for communicating the portion 20b and the opening 40a of the fan shroud 40, for example, a metal duct 41 is included.

  For example, the introduction side opening 6 a is formed at a position facing the lower part of the control box 14, and the discharge side opening 20 b is formed at a position facing the upper part of the control box 14. Other configurations are the same as those of the first embodiment.

  In the fourth embodiment configured as described above, when the cooling fan 13 is operated, a wind for cooling the heat exchanger 12 is generated as indicated by arrows 42 and 43 in FIG. 9. Due to the flow of the cooling air, the inside of the fan shroud 40 becomes negative pressure. As a result, as shown by arrows 44, 45, and 46 in FIGS. 9 and 10, the air outside the machine chamber 6 is guided from the introduction side opening 6 a to the predetermined gap 19 between the cover member 20 and the control box 14, It is discharged to the duct 41 from the discharge side opening 20b. The wind exhausted to the duct 41 is guided into the fan shroud 40 from the opening 40 a, merged with the wind generated by the cooling fan 13, and guided into the machine room 6.

  In the fourth embodiment configured as described above, an effect equivalent to that of the first embodiment described above can be obtained, and as a fan included in the air guide device, a cooling fan 13 that generates wind for cooling the heat exchanger 12 is provided. By utilizing it, the number of parts can be reduced and the production cost can be reduced.

  In the fourth embodiment, although the metal duct 41 is provided as a passage for guiding the air discharged from the discharge side opening 20b provided in the cover member 20 to the inside of the fan shroud 40, the metal duct is provided. Instead of 41, a hose that can be bent and deformed may be provided. When such a hose is provided, the arrangement position of the control box 14 inside the machine room 6 can be set relatively freely.

  Moreover, although 1st-4th embodiment is comprised by the super-large hydraulic excavator, the construction machine which concerns on this invention is not restricted to a super-large hydraulic excavator. Applicable to any construction machine having a work device attached to the main body, a control box having a control device mounted on the main body for performing various control processes, and a storage chamber for storing the control box and forming a place where the temperature becomes high Is possible.

1 traveling body 2 revolving body (main body)
3 Working device 4 Cab 5 Counterweight 6 Machine room (storage room)
6a Introduction side opening 10 Engine 11 Hydraulic pump 12 Heat exchanger 13 Cooling fan 14 Control box 19 Predetermined gap 20 Cover member 20b Discharge side opening 21 Signal line 22 Electric motor 23 Fan 24 Floor 25 Bracket 26 Air guide plate 30 Duct 30a opening 31 heat insulating material 32 bracket 33 signal line 34 electric motor 35 fan 40 fan shroud 40a opening 41 duct (passage)

Claims (5)

In a construction machine comprising a main body, a work device attached to the main body, a control box having a control device mounted on the main body for performing various control processes, and a storage chamber in which the control box is stored,
A cover member disposed inside the storage chamber and covering the control box via a predetermined gap;
A construction machine comprising: an air guide device that guides air outside the storage chamber to the inside of the cover member and discharges the guided air to the outside of the cover member. The construction machine according to claim 1,
The air guide device includes an introduction-side opening that guides air outside the storage chamber to the inside of the cover member, and a discharge-side opening that is formed in the cover member and discharges the air guided to the inside of the cover member. And a fan provided in at least one of the introduction side opening and the discharge side opening. The construction machine according to claim 2,
A construction machine comprising a bracket provided inside the cover member and supporting the control box. The construction machine according to claim 2,
A construction machine comprising a bracket provided on the floor of the storage chamber and supporting the cover member. The construction machine according to claim 1,
The storage room consists of a machine room for storing the engine,
A heat exchanger, a cooling fan for generating air to cool the heat exchanger, and a fan shroud in which the cooling fan is installed,
The air guide device is formed in a side wall of the machine room, and is formed in the cover member and an introduction side opening that guides air outside the machine room to the inside of the cover member, and is introduced into the cover member. A construction machine comprising: a discharge-side opening that discharges the discharged air; and a passage that guides the air discharged from the discharge-side opening to the inside of the fan shroud.