JP5497718B2 - Swivel work machine - Google Patents

Description

  The present invention relates to a swivel work machine such as a backhoe in which a separately installed fan device is provided near the center of a swivel base.

  In a swivel working machine such as a backhoe, a hydraulic power source is provided with a drive source room in which a drive source such as an engine is disposed at the rear of the swivel, and hydraulic equipment such as a hydraulic oil tank is installed in front of the drive source room. The equipment room and the cabin that covers the seat and the control unit in front of it are provided on the left and right, and a drilling device is provided in front of the cabin located near the center of the swivel and the hydraulic equipment room. A hydraulic device such as a swivel motor is disposed in the lower part of the vicinity, and has a cooling fan and a member to be cooled that is cooled by the cooling air of the cooling fan between the cabin behind the excavator and the hydraulic device room. Some fan devices are provided so as to block the vicinity of the center of the swivel base from above.

  In this type of conventional swivel work machine, the lower part of the separate fan device is constrained to be pivotable by a hinge, and the upper part of the separate fan device is inclined from the vertical posture to the drive source side with this hinge as a fulcrum. It was possible to switch between an inclined posture and a temporary inclined posture inclined to the excavator side (for example, Patent Document 1).

JP 2010-77634 A

  However, in the conventional case, even if the separately installed fan device is switched to the temporary inclined posture that inclines to the excavator side, it is insufficient to open the upper part near the center of the swivel, and it is provided near the center of the swivel. There was a problem that the separately installed fan device was in the way when maintaining the swivel motor and swivel joint. Further, the maintenance of the separately installed fan device is difficult only by being able to switch between the normally inclined posture inclined to the drive source side and the temporary inclined posture inclined to the excavator side.

  In view of the above problems, the present invention can be configured so that a separate fan device that closes the vicinity of the center of the swivel base from above is not obstructed when maintaining the hydraulic equipment provided near the center of the swivel base. It is an object of the present invention to provide a swivel working machine that can easily perform maintenance of a standing fan device.

In order to achieve the above object in the present invention, in claim 1, a drive source room 21 in which a drive source 20 is disposed is provided at the rear of the swivel base 7, and a side hydraulic pressure is provided at the front side of the drive source room 21. The hydraulic equipment room 27 in which equipment is installed and the cabin 13 that covers the seat 12 and the control unit are provided on the left and right sides, and a fixed cover 80 that closes the front side and the upper side of the drive source room 21 is provided. A side cover portion 69 that covers the upper side is provided, the excavator 4 is provided in front of the cabin 13 and the hydraulic equipment chamber 27, the central hydraulic equipment is disposed in the lower portion near the center of the swivel base 7, and the excavator 4 A separately installed fan device 89 having a cooling fan 87 and a member 88 to be cooled that is cooled by the cooling air of the cooling fan 87 is provided between the cabin 13 and the hydraulic equipment chamber 27 in the vicinity of the center of the swivel base 7. Up A rotary working machine provided so as to close al,
A reversing means 98 is provided for reversing and arranging the separate fan device 89 from between the cabin 13 and the hydraulic equipment chamber 27 to the rear of the drive source room 21 so as to open the upper portion near the center of the swivel base 7. In the point.

According to claim 2, in the invention of claim 1, the height of the upper end of the separately installed fan device 89 at the fixed position is set to be substantially the same as or lower than the upper ends of the fixed cover 80 and the side cover portion 69. It is what.
According to a third aspect of the present invention, in the invention of the first or second aspect, the reversing means 98 has a left and right hinge shaft 105 disposed on the rear upper side of the separate fan device 89, and the separate fan device 89 is A separately installed fan device 89 is pivotally supported around the hinge shaft 105 so as to be inverted and mounted on the fixed cover 80 from between the cabin 13 and the hydraulic equipment chamber 27.

  According to claim 1, when maintaining the central hydraulic equipment near the center of the swivel base, the reversing means reverses the separately installed fan device from between the cabin and the hydraulic equipment room to above the rear drive source room. Since the upper part near the center of the swivel base is largely open, the separately installed fan device can be easily and smoothly maintained without disturbing the separately installed fan device. .

Also, when maintaining a separately installed fan device, it is only necessary to invert the separately installed fan device by the reversing means and place it on the upper side of the drive source room. can do.
According to the second aspect, the separately installed fan device does not obstruct the field of view during excavation work or the like, and the work by the turning work machine can be performed satisfactorily.

  According to the third aspect, when maintaining the hydraulic equipment near the center of the swivel base, the separately installed fan device may be reversed around the upper hinge shaft. Therefore, it can be easily reversed and placed on the fixed cover at the same height as or higher than that, and the inverted state can be maintained stably.

It is a left view of the vicinity of the center of the swivel showing the first embodiment of the present invention. It is a top view of the turntable center vicinity. It is a front view near the center of the swivel. It is a top view of the turntable. It is a left view of the rear part of the swivel. It is a left view of the backhoe. It is a left view of the vicinity of the swivel center showing the second embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In FIG. 6, the backhoe 1 exemplified as a work machine mainly includes a traveling device 2, a revolving body 3, and an excavating device 4.
The swivel body 3 includes a swivel base 7 supported on a bearing body 8 provided at a central portion between the left and right crawler travel bodies 5 of the travel device 2 so as to be pivotable about a swivel axis in the vertical direction. A bonnet 11 that covers the various devices that are mounted, and a cabin 13 that is disposed on the front side of the bonnet 11 and covers the seat 12 and the front steering unit.

The swivel base 7 is configured by covering the swivel frame 15 with a cover member, and the rear part of the swivel base 7 is fixed to the swivel frame 15 and has a weight balance with the excavator 4 and the like at the front part of the swivel base 7. The counter weight 17 is intended.
The rear upper surface and the right upper surface of the swivel base 7 are open, and these open portions are covered with a rounded bonnet 11 protruding upward from the upper surface of the swivel base 7.

  4 to 5, inside the bonnet 11, a drive source room 21 in which an engine (drive source) 20 is arranged on the swivel base 7 and a radiator 23 located on the right side of the drive source room 21 are installed. The cooling air suction chamber 24 is provided, and a hydraulic device chamber 27 in which side hydraulic devices such as a hydraulic oil tank 26 and a control valve are installed is provided in front of the cooling air suction chamber 24. Accordingly, the drive source room 21 and the cooling air suction chamber 24 are formed on the left and right of the rear part of the swivel base 7, and the hydraulic device room 27 is disposed on the right side of the swivel base 7.

A partition wall 29 is provided between the cooling air suction chamber 24 and the hydraulic equipment chamber 27, and a blocking wall body 75, which will be described later, is provided as a partition between the drive source room 21 and the cooling air suction chamber 24.
The drive source room 21 is provided with a muffler 31, an air cleaner 33, and a radiator fan 37 in addition to the engine 20, and the radiator fan 37 sucks cooling air from the front of the radiator 23 toward the engine 20.

  The cooling air suction chamber 24 is provided with an oil cooler 55 and an engine oil cooler 57 in addition to the radiator 23. A shroud (wind tunnel) 73 is provided on the radiator 23 so as to protrude leftward. The wind tunnel 73 includes a tubular wind tunnel body 74 and a blockage projecting in the front-rear direction and upward from a midway portion in the left-right direction of the wind tunnel body 74. The closing wall 75 closes the space between the drive source room 21 and the cooling air suction chamber 24.

A return pipe 65 communicating with the hydraulic oil tank 26 penetrates the partition wall 29 and protrudes toward the cooling air suction chamber 24, and a return filter 66 is provided on the hydraulic equipment chamber 27 side.
The bonnet 11 is made of resin or a thin steel plate, and includes a side cover portion 69 that covers the upper side of the hydraulic oil tank 26 and the like (hydraulic equipment chamber 27), and a heat exchanger portion such as the engine 20 (drive source room 21) and the radiator 23 ( The rear cover 70 covers the latter half of the cooling air suction chamber 24).

  2 to 4, the hydraulic device chamber 27 and the cabin 13 are arranged on the front side of the drive source room 21 so as to be separated from each other on the left and right sides. The cabin 13 and the hydraulic device chamber located near the center of the swivel base 7. The excavator 4 shown in FIG. Central hydraulic devices such as a swing motor 78 and a swivel joint 79 are arranged in the lower part near the center of the swivel base 7.

A fixed cover 80 that covers the front side and the upper side of the drive source room 21 is provided at a boundary portion between the drive source room 21 and the front side and the upper side thereof. The fixed cover 80 is attached to a support frame 81 provided in the drive source room 21. It is fixed. A partition plate 84 is formed at the boundary between the drive source room 21 and the cabin 13 in the fixed cover 80 so as to be immersed backward and downward.
A separate fan device 89 having a cooling fan 87 and an air conditioner condenser 88 is provided between the cabin 13 behind the excavator 4 and the hydraulic equipment chamber 27 so as to block the vicinity of the center of the swivel base 7 from above. Yes.

  The air conditioner condenser 88 is an outdoor unit of an air conditioner (air conditioner) 91 provided in the cabin 13 shown in FIG. 4 and is a member to be cooled that is cooled by cooling air from the cooling fan 87. Air conditioner hoses 92a and 92b introduced from the drive source room 21 side are connected to the air conditioner capacitor 88. The air conditioner hoses 92a and 92b supply and discharge the refrigerant and the like to and from the air conditioner condenser 88, and are formed of a flexible rubber hose or the like.

  As shown in FIGS. 1 to 3, the separately installed fan device 89 has a rectangular cylindrical storage case 93 that stores and holds the cooling fan 87 and the air conditioner condenser 88 in addition to the cooling fan 87 and the air conditioner condenser 88. The storage case 93 is open at both upper and lower ends. A fan cover 95 having an air circulation hole is attached to the upper end portion of the storage case 93 so as to close the upper end opening.

  1 and 2, the lower end portion of the storage case 93 is placed on a fixing member 96 that is disposed and fixed in the middle of the upper and lower sides between the cabin 13 and the hydraulic equipment chamber 27, and projects forward from the lower end of the storage case 93. The separately installed fan device 89 is fixed at a fixed position between the cabin 13 and the hydraulic equipment chamber 27 by the fastening member 97 such as a bolt through a mounting plate 94 that is detachably fixed to the fixing member 96. Yes.

  Between the storage case 93 and the fixed cover 80 side, the separately installed fan device 89 is inverted and disposed above the drive source room 21 from between the cabin 13 and the hydraulic device chamber 27 (arranged in a vertically inverted state). Inversion means 98 is provided. The reversing means 98 is fixed to the support frame 81 in the drive source room 21 with bolts or the like and protrudes forward from the fixed cover 80, the support cylinder 102 fixed to the support bracket 101, and the storage case 93. It has a pair of left and right support stays 104 projecting from the upper part and a hinge shaft 105 fixed between the pair of support stays 104. The hinge shaft 105 is inserted into and held by the support cylinder 102 so as to be rotatable about the axis. 105 and the support cylinder 102 are disposed in the left-right direction above the rear fan device 89. The hinge shaft 105 is on the front side of the upper portion of the fixed cover 80, and the separately installed fan device 89 is set at a fixed position between the cabin 13 and the hydraulic equipment chamber 27, and is reversed and mounted on the fixed cover 80 as will be described later. It is arranged at the center point of symmetry so that it is point-symmetric with the placed state (mounted in an upside down state).

  Thus, the reversing means 98 is constituted by a hinge mechanism having the hinge shaft 105 and the support cylinder 102, and the separately installed fan device 89 is pivotally supported around the upper hinge shaft 105 so as to be reversible. The hose 92a, 92b is connected to the condenser 88 for air conditioner and can be reversed and placed on the fixed cover 80 from between the cabin 13 and the hydraulic equipment chamber 27. When the separately installed fan device 89 is inverted on the fixed cover 80, the separately installed fan device 89 is placed horizontally on the fixed cover 80 via the fan cover 95, and can be stably installed here. ing.

The height of the upper end of the separately installed fan device 89 at the fixed position is set to be substantially the same as or lower than the upper ends of the side cover portion 69 and the fixed cover 80.
A grease injector 107 is detachably held and fixed to the fixing member 96 at the front lower side of the separately installed fan device 89 between the cabin 13 and the hydraulic equipment chamber 27.
According to the above embodiment, the capacity of the cooling fan 87 and the number of rotations of the cooling fan 87 can be freely set as compared with the conventional case in which the cooling fan is rotated by the pulley of the engine to cool the condenser for the air conditioner. Accordingly, it is possible to obtain an efficient capacity of the cooling fan 87 and fan rotation speed, and the performance of the air conditioner 91 can be improved. Further, the separately installed fan device 89 is on the front side of the drive source room 21, and it is not necessary to suck in hot air discharged from the engine 20, so that the performance of the air conditioner 91 can be improved also in this respect.

Since the height of the upper end of the separate fan device 89 is set to be substantially the same as or lower than the upper ends of the side cover portion 69 and the fixed cover 80, the separate fan device 89 is used for excavation work or the like. The field of view is not obstructed, and the work by the turning work machine can be performed satisfactorily.
When maintaining the central hydraulic equipment such as the swing motor 78 and swivel joint 79 near the center of the swivel base 7, the fastener 97 is removed, and the separately installed fan device 89 is then reversed around the upper hinge shaft 105. The separate fan device 89 can be easily placed on the fixed cover 80 between the cabin 13 and the hydraulic equipment chamber 27 while the air conditioner hoses 92a and 92b are connected to the air conditioner condenser 88. The upper part near the center of the swivel base 7 is largely opened without removing the air conditioner hoses 92a and 92b.

  Accordingly, the central hydraulic device such as the swing motor 78 and the swivel joint 79 provided near the center of the swivel base 7 can be easily and smoothly maintained without the separate fan device 89 being in the way. In addition, it is possible to prevent the air conditioner gas from being released into the atmosphere by attaching and detaching the air conditioner hoses 92a and 92b, and to improve the layout flexibility of the air conditioner hoses 92a and 92b.

  Also, when the separately installed fan device 89 is maintained, the separately installed fan device 89 is then inverted around the upper hinge shaft 105 and mounted on the fixed cover 80 from between the cabin 13 and the hydraulic equipment chamber 27. The separately installed fan device 89 is stably placed on the fixed cover 80 via the fan cover 95 in an inverted state, so that the cooling fan 87 and the condenser 88 for the air conditioner are opened from the lower end opening of the storage case 93. Can be easily taken out, and the separately installed fan device 89 can be easily maintained.

FIG. 7 shows a second embodiment, and a reversing means 98 for reversing and arranging the separately installed fan device 89 between the cabin 13 and the hydraulic equipment chamber 27 above the drive source room 21 is provided with a support frame 81 in the drive source room 21. Rail member 111 fixed with bolts or the like, and rail clamping member 112 projecting from the rear upper part of the storage case 93.
The rail member 111 includes an arc-shaped rail portion 115, an upper mounting portion 116 projecting downward from the upper end of the arc-shaped rail portion 115, and a lower mounting portion 117 projecting rearward from the lower end of the arc-shaped rail portion 115. The upper mounting portion 116 and the lower mounting portion 117 are fixed to the support frame 81, and an arcuate corner portion 118 is formed between the arcuate rail portion 115 and the upper mounting portion 116.

The rail clamping member 112 includes a support rod 121 projecting from the storage case 93 and a pair of clamping rollers 123 and 124 supported by the support rod 121 so as to be rotatable around a support shaft in the left-right direction. The rail member 111 is sandwiched between the rollers 123 and 124.
Thus, the reversing means 98 is constituted by a rail mechanism having the rail member 111 and the rail clamping member 112, and the reversing means 98 allows the separately installed fan device 89 to connect the air conditioner hoses 92 a and 92 b to the air conditioner condenser 88. It can be inverted and placed on the fixed cover 80 from between the cabin 13 and the hydraulic device chamber 27 while being connected.

  That is, when the separately installed fan device 89 is located between the cabin 13 and the hydraulic equipment chamber 27, the pair of clamping rollers 123 and 124 of the rail clamping member 112 moves the lower end portion of the arc-shaped rail portion 115 of the rail member 111 forward and backward. In this state, when the separately installed fan device 89 is rotated upward with the upper rear side as a fulcrum, the pair of clamping rollers 123 and 124 are moved from the lower end to the upper end along the arc-shaped rail portion 115. When the separately placed fan device 89 rotates 90 degrees toward the upper and rear sides and further rotates the separately placed fan device 89, the pair of sandwiching rollers 123 and 124 rotate and move at the arc-shaped corner portion 118. Then, the separately placed fan device 89 further rotates 90 degrees, and as a result, the separately placed fan device 89 is turned upside down from between the cabin 13 and the hydraulic equipment chamber 27 and the fixed cover 8 It is adapted to be mounted on the top.

The other points are the same as those in the case of the first embodiment, and have the same effects as in the case of the first embodiment.
In the above embodiment, the separately installed fan device 89 has the air conditioner condenser 88 as a member to be cooled. However, the member to be cooled by the cooling air of the cooling fan 87 is an oil cooler, radiator, engine oil. A cooler, an EGR cooler, a fuel cooler, or the like may be used.

  In the embodiment, the separately placed fan device 89 is inverted and placed on the fixed cover 80. Instead, the separately placed fan device 89 is inverted above the fixed cover 80 and then fixed. You may make it hold | maintain this inversion state with a stopper etc., without mounting on the cover 80. FIG. In this case, the separately installed fan device 89 may be held in a state where it is tilted rearward and the like.

  Further, a motor or other drive source may be provided in the drive source room 21 instead of the engine 20.

1 Backhoe 7 Swivel 12 Seat 13 Cabin 20 Engine (Drive Source)
21 Drive source room 27 Hydraulic equipment room 69 Side cover part 78 Turning motor 79 Swivel joint 80 Fixed cover 87 Cooling fan 88 Air conditioner condenser (cooled member)
89 Separate fan device 98 Reversing means 105 Hinge shaft

Claims (3)

A drive source room (21) in which a drive source (20) is arranged is provided at the rear of the swivel base (7), and a hydraulic equipment room (with a side hydraulic device installed on the front side of the drive source room (21)) ( 27) and a cabin (13) that covers the seat (12) and the control unit are provided on the left and right sides, a fixed cover (80) that closes the front side and the upper side of the drive source room (21) is provided, and a hydraulic equipment room ( 27) is provided with a side cover portion (69) that covers the upper side, and a drilling device (4) is provided in front of the cabin (13) and the hydraulic equipment chamber (27), and is near the center of the swivel base (7). A central hydraulic device is disposed in the lower portion of the slab, and a cooling fan (87) and cooling air from the cooling fan (87) are provided between the cabin (13) and the hydraulic device chamber (27) behind the excavator (4). Separately installed fan device (89) having cooled member (88) to be cooled , A swivel base (7) swivel work machine near the center is provided so as to close from above the,
The separate fan device (89) is inverted from between the cabin (13) and the hydraulic equipment room (27) to the rear of the drive source room (21) so as to open the upper part near the center of the swivel base (7). A turning work machine characterized in that reversing means (98) to be arranged is provided.   The height of the upper end of the separately installed fan device (89) in the fixed position is set to be substantially the same as or lower than the upper ends of the fixed cover (80) and the side cover part (69). The turning work machine according to claim 1.   The reversing means (98) has a left and right hinge shaft (105) disposed on the rear upper side of the separately placed fan device (89), and the separately placed fan device (89) is connected to the cabin (13) and the hydraulic equipment. A separate fan device (89) is pivotally supported about a hinge shaft (105) so as to be reversed and placed on the fixed cover (80) from between the chamber (27) and the chamber (27). Item 3. A turning work machine according to item 1 or 2.

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