JP2011140820A - Construction machinery - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide construction machinery which effectively cools an oil tank by a small and simple structure and prevents an excessive increase in temperature of oil in the oil tank. <P>SOLUTION: This construction machinery includes: an outside air lead-in port 14e for leading the outside air into an oil tank chamber 14 of a pile driver 10; an outlet 14d which discharges the air in the oil tank chamber to the outside; and an intake fan 22 for forming an air flow for discharging the air in the oil tank chamber from the outlet 14d to the outside by taking the outside air into the oil tank chamber from the outside air lead-in port 14e. The construction machinery also includes a solar cell 25 for generating electric power serving as a power source for the intake fan 22, and a battery 26 for storing the electricity generated by the solar cell 25. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a construction machine that operates by hydraulic pressure, such as a pile driver or a hydraulic excavator, and in particular, an oil tank chamber in which an oil tank storing oil (hydraulic oil) is partitioned separately from an engine chamber. The present invention relates to a cooling structure for an oil tank in a construction machine housed inside the machine.

  In construction machines such as pile drivers and hydraulic excavators, an oil cooler is installed in the radiator section of the engine to suppress the temperature rise of the hydraulic pump driven by the engine and the temperature rise of the oil supplied to the hydraulic cylinder. The cooling air is circulated by the driven cooling fan to cool the oil cooler together with the radiator.

  Further, in the case where the hydraulic pump is housed in the pump chamber partitioned from the engine chamber, a temperature increase in the pump chamber is suppressed by providing a cross-flow fan in the pump chamber and taking in outside air (see, for example, Patent Document 1). .)

JP 2007-211163 A

  However, in order to sufficiently cool the oil even when the outdoor temperature is high in summer, it is necessary to install a large oil cooler. In the above-mentioned Patent Document 1, a cross-flow fan is provided in the pump chamber. Therefore, there is a problem that the volume of the pump chamber becomes large.

  Therefore, an object of the present invention is to provide a construction machine that can effectively cool an oil tank with a small and simple structure and can prevent the temperature of oil in the oil tank from rising excessively.

  In order to achieve the above object, a construction machine according to the present invention introduces outside air into the oil tank chamber in a construction machine provided with an oil tank chamber that houses an oil tank in an upper swing body provided on an upper portion of a lower traveling body. An outside air introduction port, an exhaust port for discharging the air in the oil tank chamber to the outside, and an air for taking outside air into the oil tank chamber from the outside air introduction port and discharging the air in the oil tank chamber to the outside from the exhaust port And a fan for forming a flow, a solar cell for generating electric power as a power source for the fan, and a battery for storing electricity generated by the solar cell. The battery may be disposed on an upper portion of a counterweight provided on the rear side of the upper revolving body, and the battery may be disposed inside the counterweight.

  According to the construction machine of the present invention, by operating the fan, the air in the oil tank chamber having a high temperature can be exhausted from the exhaust port to the outside while taking in the outside air into the oil tank chamber. Even if the temperature rises, the oil can be efficiently cooled via the oil tank. In addition, the fan is extremely economical by operating with the electric power generated by the solar cell and is also environmentally good. Since the fan includes a battery for storing electricity generated by the solar cell, Even when the amount of power generation falls below the specified value, power can be supplied from the battery to the fan, the fan can be operated at all times regardless of the weather or day and night, and the burden on the battery and alternator attached to the engine is reduced. be able to. Further, space can be saved by disposing the solar cell on the counterweight and disposing the battery on the counterweight.

It is a principal part side view of a pile driver which shows one example of the present invention. It is a principal part top view of a pile driver similarly. It is a side view of a lower traveling body and an upper swing body of the pile driver. It is a top view of the lower traveling body and upper revolving body of a pile driver similarly. It is a side view of a pile driver similarly.

  The figure shows an embodiment in which the construction machine of the present invention is applied to a pile driving machine. The pile driving machine 10 is provided with a lower traveling body 11 provided with a crawler 11a, and can be turned on the lower traveling body 11. The upper revolving unit 12 is provided, and a leader 13 is provided at the front portion of the upper revolving unit 12 so as to be raised and lowered. The upper swing body 12 is provided with an oil tank chamber 14 on the right rear side on the main frame 12a, an cab 15 on the right front side, and an engine chamber 16 containing an engine, a hydraulic pump and the like on the left side. Yes. Further, a counterweight placement portion 17 is provided at the rear of the upper swing body 12, and the counterweight placement portion 17 has a counterweight having a weight for balancing the vehicle body in accordance with the work ability in front of the vehicle body. 17a is provided.

  The oil tank chamber 14 that accommodates the oil tank 18 is a box-like shape formed by a top plate 14a and a bottom plate 14b having a rectangular shape in plan view, and a four peripheral wall 14c. The top plate 14a has a rectangular opening. The exhaust port 14d and the outside air introduction port 14e are each opened, and an inspection door 14f is provided on the wall surface outside the vehicle body.

  The exhaust port 14 d is covered with a duct member 19. The duct member 19 covers a mounting plate 19a larger than the exhaust port 14d, an air circulation port 19b that opens to the center of the mounting plate 19a and communicates with the exhaust port 14d, and an upper side of the air circulation port 19b. And a flat tunnel-shaped cover member 19d having a side opening 19c on the side surface, and rises upward from the mounting plate 19a between the side opening 19c of the cover member 19d and the air circulation port 19b. And a weir plate 20 that is inclined in the direction of the side opening 19c and forms an air flow path between the upper edge of the inclined portion and the lower surface of the top plate of the cover member 19d. Further, an oil supply port 18a for supplying oil to the oil tank 18 and an oil supply lid 21 that closes the oil supply port 18a are provided at the center of the top plate of the duct member 19, and the oil supply lid 21 is provided via a hinge. Thus, the fuel filler opening 18a can be opened and closed.

  An air intake duct 23 is provided on the top surface of the top plate 14a so as to cover the outside air inlet 14e and the periphery of the air intake fan 22. The intake duct 23 includes a lower flange portion 23a that is fixed to the upper surface of the top plate 14a, a fan mounting portion 23b that is erected on the right side surface of the upper swing body 12, and an outside air inlet that opens to the fan mounting portion 23b. 23c and a cover portion 23d that rises from the lower flange portion 23a and covers the periphery of the outside air introduction port 14e and is inclined downward from the upper surface portion of the fan mounting portion 23b. It is provided in the state which faced the inner peripheral part of the inlet 23c. Further, a guide cylinder 24 extending below the oil tank 18 in the oil tank chamber 14 is inserted into the outside air introduction port 14e.

  The intake fan 22 is operated by the electric power generated by the solar cell 25, and the electric power generated by the solar cell 25 is stored in the battery 26, and the electric power is supplied from the battery 26 to the intake fan 22. The solar cell 25 is a well-known battery that generates power with sunlight, and is fixed to the upper surface of a support base 27 attached to the top surface of the counterweight mounting portion 17 with screws or the like, and the battery 26 is mounted on the counterweight mounting portion 17. Is provided inside. The electric power generated by the solar cell 25 is always charged in the battery 26, and the intake fan 22 is operated by the electric power obtained through the battery 26.

  In the pile driving machine 10 having the oil tank chamber 14 formed in this way, the temperature of the oil rises by driving a front device such as a hydraulic auger when the outside air temperature is high in summer, and the outer surface temperature of the oil tank 18 is increased. When the air temperature rises, the intake fan 22 is operated by a switch provided on the cab 15 or the temperature in the oil tank chamber 14 or the temperature of the oil is detected by a sensor, and the temperature detected by the sensor is By automatically operating the intake fan 22 when the temperature becomes higher than a preset temperature, the outside air can be taken into the oil tank chamber 14 and the oil tank 18 can be cooled.

  That is, when the intake fan 22 is operated, the outside air taken into the intake duct 23 from the outside air inlet 23c of the intake duct 23 passes from the outside air introduction port 14e through the guide cylinder 24 to the lower part of the oil tank chamber 14. It is guided by A1 and introduced into the lower part of the oil tank chamber 14. On the other hand, the air whose temperature has risen in the oil tank chamber 14 is pushed out by the outside air introduced into the lower portion of the oil tank chamber 14, and the air circulation port 19 b and the weir plate from the exhaust port 14 d formed in the upper portion of the oil tank chamber 14. The air is forcibly discharged to the outside through the upper air flow path A2 that reaches the side opening 19c through 20 above. Therefore, no hot air is trapped in the oil tank chamber 14, the oil tank chamber 14 can be efficiently and reliably cooled by the outside air, and the oil temperature can be prevented from excessively rising.

  Thereby, the temperature rise of the oil tank 18 can be prevented, the oil can be prevented from overheating even in the hot summer season, and the oil cooler can be downsized. Further, since hot air rises in the oil tank chamber 14, the upper air flow path A2 on the exhaust side is provided on the top plate 14a of the oil tank chamber 14 so that the hot air can be satisfactorily discharged from the upper air flow path A2. Can be discharged.

  Furthermore, by operating the intake fan 22 with the electric power generated by the solar battery 25, it is extremely economical and environmentally good. In addition, the intake fan 22 can be operated without imposing a load on the alternator of the engine that must supply a large amount of power to the cooler in the cab 15 and the cab is operated by operating the cooler even when the engine is idling. The air in the oil tank 18 can be cooled by operating the intake fan 22 while cooling.

  In addition, since the intake fan 22 is supplied with electric power through a battery 26 that stores electricity generated by the solar battery 25, the intake fan 22 can always be operated regardless of the weather or day and night. Moreover, since the solar cell 25 and the battery 26 are provided in the counterweight mounting part 17, they can be used as weights.

  Furthermore, even in the case of a medium or small pile driver with limited space, the intake fan 22 is provided on the upper surface of the oil tank chamber 14, so that the volume of the oil tank chamber 14 can be increased without increasing the volume of the outside air. Can be circulated effectively, and the inside of the oil tank chamber 14 can be cooled well. Further, the upper portion of the outside air introduction port 14e is covered with the intake duct 23, the intake fan 22 is provided at the outside air inlet opening to the side of the intake duct 23, and the exhaust port 14d is covered with the duct member 19. The rainwater can be prevented from flowing into the oil tank chamber 14.

  In particular, the radiator is a construction machine in which an oil tank chamber 14 is arranged on a side different from the engine chamber 16 where a flow of air is obtained by a radiator fan in a medium-sized or small pile driver with limited space. Even in the case of the oil tank chamber 14 in which the air flow by the fan is not obtained, the outside air can be effectively taken into the oil tank chamber 14, so that the oil tank 18 can be made without increasing the size of the oil tank chamber 14. Can be cooled satisfactorily.

  It should be noted that the shape and position of the outside air inlet and outlet and the position where the fan is provided in the oil tank chamber can be provided at any position as long as the air can be cooled by circulating the outside air through the oil tank chamber. For example, an outside air introduction port may be provided in the lower part of the oil tank chamber, an exhaust port may be provided in the upper part, and an exhaust fan may be provided in the exhaust port. Moreover, arrangement | positioning of a solar cell and a battery is also arbitrary, a solar cell can be arrange | positioned on the roof part of a driver's cab, and a battery can also be accommodated in the inside of an oil tank chamber. Furthermore, the present invention is not limited to those applied to a pile driving machine as in the above-described embodiments, but can be applied to other various construction machines such as a hydraulic excavator and a crane.

  DESCRIPTION OF SYMBOLS 10 ... Pile driver, 11 ... Lower traveling body, 11a ... Crawler, 12 ... Upper turning body, 12a ... Main frame, 13 ... Leader, 14 ... Oil tank chamber, 14a ... Top plate, 14b ... Bottom plate, 14c ... Four round walls , 14d ... exhaust port, 14e ... outside air inlet port, 14f ... inspection door, 15 ... cab, 16 ... engine room, 17 ... counterweight placement part, 17a ... counterweight, 18 ... oil tank, 18a ... oil filler port, DESCRIPTION OF SYMBOLS 19 ... Duct member, 19a ... Mounting plate, 19b ... Air distribution port, 19c ... Side opening, 19d ... Cover member, 20 ... Dam plate, 21 ... Filling lid, 22 ... Intake fan, 23 ... Intake duct, 24 ... Guide Tube, 25 ... solar cell, 26 ... battery, 27 ... support base

Claims (2)

In a construction machine having an oil tank chamber for storing an oil tank in an upper swing body provided at an upper portion of a lower traveling body, an outside air introduction port for introducing outside air into the oil tank chamber and air in the oil tank chamber are An exhaust port for discharging the air into the oil tank chamber and forming an air flow for discharging the air in the oil tank chamber from the exhaust port to the outside. A construction machine comprising: a solar battery that generates electric power as a power source of the battery; and a battery that stores electricity generated by the solar battery. 2. The construction machine according to claim 1, wherein the solar cell is disposed on an upper portion of a counterweight provided on a rear body of the upper swing body, and the battery is disposed inside the counterweight. .

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