JP2009263120A - Air conditioner layout of work machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air conditioner layout of a work machine capable of suppressing the increase of layout dimensions of an air conditioner including a driving system caused by the tightening of emission control or the improvement of maintenance-free, in the air conditioner of the work machine such as a crawler crane or a wheel crane. <P>SOLUTION: The air conditioner of the work machine comprises a prime mover 4 as a power source of the work machine, a power distributing device 8 distributing the driving force of the prime mover 4 to a working device 12, and a compressor 9 for compressing a coolant constituting the air conditioner. The compressor 9 is driven by the prime mover 4 through the power distributing device 8. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to the arrangement of air-conditioning equipment in work machines such as crawler cranes and wheel cranes, and more specifically, the work machine capable of suppressing an increase in the arrangement size of air-conditioning equipment due to stricter exhaust gas regulations and maintenance-free operation. It relates to the arrangement of air conditioning equipment.

  First, equipment arrangement of an air conditioner in a work machine according to a conventional example will be described with reference to FIGS. 7 is a schematic plan view of an upper swing body of a crane according to a conventional example in plan view, FIG. 8 is a schematic side view of FIG. 7 as viewed from the side, FIG. 9 relates to the conventional example, and an example of an increase in body size Fig. 10 is a schematic plan view of the upper swing body of the crane shown in plan view, and Fig. 10 is a schematic side view of Fig. 9 viewed from the side.

  Conventionally, in a work machine such as a crane, a prime mover (engine) as a power source of the work machine and various devices arranged around the work machine are fixed on a frame 22 of an upper swing body 21 as shown in FIGS. It is arranged. The driving force generated by the prime mover 24 such as a diesel engine is transmitted to a working device 32 such as a hydraulic pump via a power distribution device (power divider) 28, and is applied to the crank pulley 24c and the generator pulley 26a. Is transmitted to the generator 26 via the belt 27.

  Further, the driving force is transmitted to the compressor 29 for compressing the refrigerant of the air conditioner through the belt 30 wound around the crank pulley 24c and the compressor pulley 29a. And it is comprised so that the inside of the cab 23 may be air-conditioned by the air conditioner containing the said compressor 29 (for example, refer patent documents 1-3).

  Further, the driving force generated by the prime mover 24 is transmitted to the cooling fan 25 and is sent to a radiator 35 for cooling the prime mover 24. Here, reference numeral 33 denotes a flywheel housing for smooth rotation of the prime mover 24.

  Usually, as shown in FIGS. 7 and 8, a generator 26 and a compressor 29 for an air conditioner are often provided on both sides of the prime mover 24. This is because an efficient arrangement can be made in constructing a belt drive using the crank pulley 24c as a power source, and it is a standard arrangement of a prime mover manufacturer. In addition, in working machines such as construction machines with a small number of production, standard parts from prime mover manufacturers are used as much as possible in terms of cost and availability.

  However, in recent years, with the tightening of exhaust gas regulations and the maintenance-free operation, the number of accessories attached to the prime mover 24 has increased, and the layout size of air conditioning equipment including a drive system tends to increase. These increases in layout dimensions lead to an increase in body dimensions such as vehicle width and overall height, and in work machines such as wheel cranes that are legally restricted in terms of dimensions as vehicles, a very serious problem that determines the success or failure of the work machine. It becomes. On the other hand, in work machines such as crawler cranes, in recent years, it has been necessary to reduce the size of the airframe in order to improve transportability. It becomes a problem.

As is well known, an increase in the size of the aircraft causes an increase in weight and an increase in air resistance, and there is also a problem that fuel consumption during traveling and transportation deteriorates. An example is shown in FIGS. Reference numeral 37 denotes a filter for engine oil, which has been increased in size and increased by extending the engine oil replacement cycle, extending the life of the prime mover 24, and the like. Reference numeral 36 denotes an external EGR pipe, which is a device provided in response to the tightening of exhaust gas regulations, and has a function of controlling reburning of exhaust gas. As the number of accessories attached to the prime mover 24 increases, the machine width of the upper swing body 21 increases.
Japanese Patent Laid-Open No. 11-82053 Japanese Patent No. 3998025 JP 2007-107230 A

  Accordingly, an object of the present invention is to provide an air conditioner for a work machine such as a crawler crane or a wheel crane, which is capable of suppressing an increase in the arrangement size of the air conditioner including a drive system due to the tightening of exhaust gas regulations and the maintenance-free operation. It is to provide an air conditioning equipment arrangement.

  That is, in order to achieve the above object, the means adopted by the air conditioner arrangement of the work machine according to claim 1 of the present invention is the motor as a power source of the work machine in the air conditioner arrangement of the work machine, and the motor A power distribution device for distributing the driving force to the working device and a compressor for compressing the refrigerant constituting the air conditioner, and the compressor is driven by the prime mover via the power distribution device. It is characterized by.

  The air conditioner arrangement of the work machine according to claim 2 of the present invention employs the air conditioner arrangement of the work machine according to claim 1, wherein the input shaft of the power distribution device is coaxial with the output shaft of the prime mover. A first output shaft is provided on the input shaft side of the power distribution device in parallel with the input shaft, and a second output shaft is provided on the opposite side of the input shaft in parallel with the input shaft. An input shaft of the working device is connected to the second output shaft, and a rotation transmission means for transmitting rotation to the input shaft of the compressor is connected to the first output shaft. The compressor is driven through the above.

  The air conditioner arrangement of the work machine according to claim 3 of the present invention employs the air conditioner arrangement of the work machine according to claim 1, wherein the input shaft of the power distribution device is coaxial with the output shaft of the prime mover. A plurality of the second output shafts are provided in parallel to the input shaft on the side opposite to the input shaft, and the second output shaft includes the input shaft of the working device and the compressor. The rotation transmission means for transmitting the rotation to the input shaft is connected, and the compressor is driven through the rotation transmission means.

  The air conditioner arrangement of the work machine according to claim 4 of the present invention employs the air conditioner arrangement of the work machine according to claim 2 or 3, wherein the rotation transmission means is the first output shaft or the second output shaft. It comprises a pulley attached to an output shaft and an input shaft of the compressor, and a belt wound around these pulleys.

  The air conditioner arrangement of the work machine according to claim 5 of the present invention employs the air conditioner arrangement of the work machine according to claim 2 or 3, wherein the rotation transmission means is the first output shaft or the second output shaft. It consists of the shaft coupling which connects an output shaft and the input shaft of the said compressor, or a shaft coupling and a gear box.

  According to the air conditioner arrangement of the work machine according to claim 1 of the present invention, in the air conditioner arrangement of the work machine, the prime mover as the power source of the work machine and the power for distributing the driving force of the prime mover to the work device Since the distribution device and the compressor for compressing the refrigerant constituting the air conditioner are provided, and this compressor is driven by the prime mover through the power distribution device, the degree of freedom of the arrangement of the compressor is increased. The size of the vehicle body can be reduced by disposing the compressor at a position that avoids existing prime mover accessories.

  According to the air conditioner arrangement of the work machine according to claim 2 of the present invention, the input shaft of the power distribution device is coaxially connected to the output shaft of the prime mover, and the input shaft side of the power distribution device is A first output shaft is provided in parallel with the input shaft, and a second output shaft is provided in parallel with the input shaft on the opposite side of the input shaft, while the input shaft of the working device is connected to the second output shaft. In addition, rotation transmission means for transmitting rotation to the input shaft of the compressor is connected to the first output shaft, and the compressor is driven via the rotation transmission means.

  As a result, the space between the prime mover and the power distribution device existing in the upper part of the flywheel housing can be used effectively. In addition, the compressor is more efficient than a system in which the compressor is driven by a hydraulic pressure or an electric motor, and is excellent in cost and reliability.

  Further, according to the air conditioner arrangement of the work machine according to claim 3 of the present invention, the input shaft of the power distribution device is coaxially connected to the output shaft of the prime mover, and the input shaft is opposite to the input shaft. A plurality of the second output shafts are provided in parallel with each other, and the rotation output means for transmitting the rotation to the input shaft of the working device and the input shaft of the compressor is provided on the second output shafts. And the compressor is driven through this rotation transmission means.

  Therefore, for example, even when the width of the power distribution device is large and the compressor cannot be disposed on the side surface of the power distribution device, it can be configured without sacrificing the entire width of the airframe. Further, even if there are many auxiliary machines on the prime mover side and the compressor cannot be arranged on the prime mover side, it can be configured without sacrificing the full width of the machine body. In addition, as described above, the compressor is more efficient than the method in which the compressor is driven by a hydraulic pressure or an electric motor, and is excellent in cost and reliability.

  On the other hand, according to the air conditioner arrangement of the work machine according to claim 4 of the present invention, the rotation transmitting means includes a pulley attached to the first output shaft or the second output shaft and the input shaft of the compressor, and Since it consists of a belt hung between these pulleys, the rotation transmission means can be easily realized using commercially available equipment.

  According to the air conditioner arrangement of the work machine according to claim 5 of the present invention, the rotation transmission means is a shaft coupling that connects the first output shaft or the second output shaft and the input shaft of the compressor, or Since it consists of a shaft coupling and a gear box, the rotation transmission means can be realized in a compact and simple manner using commercially available equipment.

  Next, the air conditioner arrangement of the work machine according to the first embodiment of the present invention will be described with reference to the attached FIGS. FIG. 1 is a schematic plan view of an upper swing body of a crane according to a first embodiment of the present invention viewed in plan, and FIG. 2 is a schematic side view of FIG.

  The air conditioner arrangement of the work machine according to the first embodiment of the present invention is such that a prime mover 4 such as a diesel engine as a power source of the work machine and a prime mover 4 of the work machine upper revolving body 1 A power distribution device 8 for distributing the driving force to the work device 12 and a compressor 9 for cooling the refrigerant constituting the air conditioning device for air-conditioning the cab 3 are provided. It is driven by the prime mover 4 via the device 8.

  That is, the driving force (rotational force) generated by the prime mover 4 is transmitted to the cooling fan 5 attached to the prime mover output shaft 4a protruding toward the cab 3 side, and is supplied to the radiator 15 for cooling the prime mover 4. The air is blown and transmitted from the pulley 4c attached to the motor output shaft 4a to the generator 6 via the belt 7 wound around the pulley 6a attached to the input shaft of the generator 6. Has been.

  On the other hand, the input shaft of the power distribution device 8 is coaxially connected to the motor output shaft 4b on the opposite side of the cab 3 of the motor 4 and the input shaft side of the power distribution device 8 is parallel to the input shaft. On the opposite side of the first output shaft 8a from the input shaft, a second output shaft 8b is provided in parallel with the input shaft. The input shaft of the working device 12 such as a hydraulic pump is connected to the second output shaft 8b, and the driving force generated by the prime mover 4 causes the second output shaft 8b of the power distribution device 8 to The power is transmitted to the working device 12 via the above.

  Furthermore, in the layout shown in FIGS. 1 and 2, the first output shaft 8a provided on the input shaft side on the front upper side of the power distribution device 8 includes a pulley 8c attached to the output shaft 8a, The rotation transmission means 11 which consists of the pulley 9a attached to the input shaft of the compressor 9 and the belt 10 wound around these pulleys 8c and 9a is connected. Then, the driving force generated by the prime mover 4 is transmitted from the first output shaft 8a of the power distribution device 8 via the rotation transmission means 11 disposed in the upper space of the flywheel housing 13 to the air conditioner. It is comprised so that it may be transmitted to the compressor 9 for compressing a refrigerant | coolant. Reference numeral 16 denotes an external EGR pipe, and reference numeral 17 denotes an engine oil filter.

  As described above, the air conditioner arrangement of the work machine according to the first embodiment of the present invention is provided with the first output shaft 8a on the input shaft side disposed on the upper front side of the power distribution device 8, and the first output Since the rotation transmission means 11 comprising the pulley 8c attached to the shaft 8a, the pulley 9a attached to the input shaft of the compressor 9, and the belt 10 wound around these pulleys 8c, 9a is constructed, the flywheel The space between the prime mover 4 and the power distribution device 8 existing above the housing 13 can be used effectively.

  Further, by providing the first output shaft 8a on the upper front side of the power distribution device 8, the degree of freedom of arrangement of the rotation transmission means 11 and the compressor 9 can be increased, and the existing prime mover auxiliary machines can be installed. The compressor 9 can be arranged at the avoided position to reduce the vehicle body dimensions (in this case, the full width). In addition, the compressor 9 is more efficient than a system in which the compressor 9 is driven by a hydraulic pressure or an electric motor, and is excellent in cost and reliability.

  Next, the arrangement of the air conditioning equipment for the work machine according to Embodiment 2 of the present invention will be described with reference to FIGS. FIG. 3 is a schematic plan view of the upper swing body of the crane according to the second embodiment of the present invention viewed in plan, and FIG. 4 is a schematic side view of FIG. 3 viewed from the side.

  However, the second embodiment of the present invention differs from the first embodiment in that there is a difference in the arrangement of the rotation transmission means provided in the power distribution device and the compressor constituting the air conditioner, except for these differences. Since the configuration is exactly the same as in the first embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and different points will be described below.

  That is, in the first embodiment, the driving force of the prime mover 4 is generated from the first output shaft 8a provided on the input shaft side on the front upper side of the power distribution device 8 in the layout shown in FIGS. Further, it is configured to be transmitted to the compressor 9 disposed further on the front side through the rotation transmitting means 11.

  On the other hand, in the second embodiment of the present invention, the driving force of the prime mover 4 is the first provided on the input shaft side at the upper rear side of the power distribution device 8 in the layout diagrams shown in FIGS. The output shaft 8 a is configured to be transmitted to the compressor 9 disposed further on the back side through the rotation transmitting means 11.

  As described above, the air conditioner arrangement of the work machine according to the second embodiment of the present invention is provided with the first output shaft 8a on the input shaft side disposed at the upper back side of the power distribution device 8, and the first output Since the rotation transmission means 11 comprising the pulley 8c attached to the shaft 8a, the pulley 9a attached to the input shaft of the compressor 9, and the belt 10 wound around these pulleys 8c, 9a is constructed, As in the first embodiment, the space between the prime mover 4 and the power distribution device 8 existing above the flywheel housing 13 can be used effectively.

  Further, by providing the first output shaft 8a at the upper part on the back side of the power distribution device 8, the compressor 9 is disposed at a position avoiding the existing prime mover auxiliary machines as in the first embodiment, and the vehicle body The dimensions (in this case too) can be reduced. In addition, the compressor 9 is more efficient than a system in which the compressor 9 is driven by a hydraulic pressure or an electric motor, and is excellent in cost and reliability.

  Next, an air conditioner for a working machine according to Embodiment 3 of the present invention will be described with reference to FIGS. FIG. 5 is a schematic plan view of the upper turning body of the crane according to the third embodiment of the present invention viewed in plan, and FIG. 6 is a schematic side view of FIG. 5 viewed from the side.

  However, the third embodiment of the present invention differs from the first embodiment described above in that there is a difference in the arrangement of the rotation transmission means provided in the power distribution device and the compressor constituting the air conditioner, except for these differences. Since the configuration is exactly the same as in the first embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and different points will be described below.

  That is, in the first embodiment, the driving force of the prime mover 4 is generated from the first output shaft 8a provided on the input shaft side on the front upper side of the power distribution device 8 in the layout shown in FIGS. In the third embodiment of the present invention, the driving force of the prime mover 4 is transmitted to the compressor 9 disposed further on the front side via the rotation transmission means 11. The power distribution device 8 is configured to be transmitted to the compressor 9 via the spline 14 (rotation transmission means 11) from the second output shaft 8b. Therefore, in the second embodiment, a space is secured on the back side of the prime mover 9 that could not be arranged, and for example, an air compressor 18 for producing compressed air can be arranged in this space.

  Thus, the air conditioner arrangement of the work machine according to Embodiment 3 of the present invention is such that the compressor is connected to the second output shaft 8b provided on the side opposite to the input shaft side of the power distribution device 8 via the spline 14. 9 is connected and arranged, for example, even if the width of the power distribution device 8 is large and the compressor 9 cannot be disposed on the side surface of the power distribution device 8, it can be configured without sacrificing the entire width of the airframe. Further, even when there are many auxiliary machines on the prime mover 4 side and the compressor 9 cannot be disposed on the prime mover 4 side, it can be configured without sacrificing the full width of the machine body. In addition, as in the first and second embodiments, the compressor 9 is more efficient than the method in which the compressor 9 is driven by a hydraulic pressure or an electric motor, and is excellent in cost and reliability.

  As described above, according to the air conditioner arrangement of the work machine according to the present invention, it is possible to cope with the stricter exhaust gas regulations and the maintenance-free operation. The compressor which comprises an air-conditioning apparatus can be arrange | positioned well, it becomes possible to maintain a required airframe dimension, and the fuel consumption at the time of driving | running | working and transport does not deteriorate. In addition, the efficiency, cost, and reliability are not sacrificed unlike the method of driving the compressor with a hydraulic pressure or an electric motor.

  In the first and second embodiments, the pulley 8c attached to the first output shaft 8a, the pulley 9a attached to the input shaft of the compressor 9, and the pulleys 8c and 9a are wound around. Although the rotation transmission means 11 comprising the belt 10 has been described, the rotation transmission means 11 includes a shaft coupling connected to the first output shaft 8 a or the second output shaft 8 b and the input shaft of the compressor 9. Or what consists of a shaft coupling and a gear box may be sufficient.

  Similarly, in Embodiment 3 described above, the first output shaft 8a or the second output shaft 8b and the rotation transmission means 11 comprising a spline connected to the input shaft of the compressor 9 have been described. The rotation transmission means 11 includes a pulley 8c attached to the first output shaft 8a, a pulley 9a attached to the input shaft of the compressor 9, and a belt 10 wound around these pulleys 8c and 9a. Alternatively, the first output shaft 8a or the second output shaft 8b and a gear box connected to the input shaft of the compressor 9 may be used.

It is the typical top view which planarly viewed the upper turning body of the crane which concerns on Embodiment 1 of this invention. It is the typical side view which looked at FIG. 1 from the side. It is the typical top view which planarly viewed the upper turning body of the crane which concerns on Embodiment 2 of this invention. It is the typical side view which looked at FIG. 3 from the side. It is the typical top view which planarly viewed the upper turning body of the crane which concerns on Embodiment 3 of this invention. It is the typical side view which looked at FIG. 5 from the side. It is the typical top view which planarly viewed the upper turning body of the crane which concerns on a prior art example. FIG. 8 is a schematic side view of FIG. 7 viewed from the side. It is the typical top view which looked at the upper revolving body of the crane which concerns on a prior art example, and shows an example of the increase in a body size. FIG. 10 is a schematic side view of FIG. 9 viewed from the side.

Explanation of symbols

1: upper swing body, 2: swing frame, 3: cab
4: prime mover, 4a, 4b: prime mover output shaft, 4c: crank pulley,
5: Cooling fan,
6: Generator, 6a: Pulley, 7: Belt,
8: Power distribution device, 8a: First output shaft, 8b: Second output shaft, 8c: Pulley,
9: Compressor, 9a: Pulley, 10: Belt,
11: Rotation transmission means, 12: Working device, 13: Flywheel housing,
14: Spline, 15: Radiator, 16: Piping of external EGR,
17: Filter for engine oil, 18: Air compressor

Claims (5)

  In the arrangement of the air conditioning equipment of the work machine, a prime mover as a power source of the work machine, a power distribution device for distributing the driving force of the prime mover to the work device, and a compressor for compressing refrigerant constituting the air conditioner are provided. The compressor is driven by a prime mover through the power distribution device.   The input shaft of the power distribution device is coaxially connected to the output shaft of the prime mover, the first output shaft is parallel to the input shaft on the input shaft side of the power distribution device, and the input shaft is on the opposite side of the input shaft. A second output shaft is provided in parallel with the input shaft, and the input shaft of the working device is connected to the second output shaft, and the first output shaft rotates on the input shaft of the compressor. 2. The air conditioner arrangement for a work machine according to claim 1, wherein a rotation transmission means for transmission is connected, and the compressor is driven through the rotation transmission means.   An input shaft of the power distribution device is coaxially connected to an output shaft of the prime mover, and a plurality of the second output shafts are provided in parallel to the input shaft on the opposite side to the input shaft, The two output shafts are connected to the input shaft of the working device and the rotation transmission means for transmitting rotation to the input shaft of the compressor, and the compressor is driven through the rotation transmission means. The air conditioner arrangement of the work machine according to claim 1.   3. The rotation transmitting means comprises a pulley attached to the first output shaft or the second output shaft and an input shaft of the compressor, and a belt wound around these pulleys. Or the air-conditioning equipment arrangement | positioning of the working machine of 3.   The said rotation transmission means consists of a shaft coupling which connects the said 1st output shaft or the 2nd output shaft, and the input shaft of the said compressor, and a gear box, The gear box of Claim 2 or 3 characterized by the above-mentioned. Arrangement of air conditioning equipment for work machines.

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