JP5286304B2 - Air duct unit for air conditioner of swivel work machine - Google Patents

Description

  The present invention relates to an air supply duct device for an air conditioner of a turning work machine.

  In a swivel working machine such as a backhoe, on the swivel base, a driver's seat, a control device in front of the driver's seat, an air conditioner unit installed on a unit mounting base constituting the upper plate of the swivel base below the driver's seat, An air conditioner outlet duct that blows out air from the air conditioner unit in front of the driver's seat and on the side of the control device is provided, and the air supply port of the air conditioner unit and the inlet port of the air conditioner outlet duct are located below the upper plate of the swivel base. There are air-conditioning air ducts that are connected to each other.

  In this type of conventional air-conditioning air supply duct device for a swivel work machine, the air-conditioning air-supply duct is integrally formed, and communicates with the side communicating with the air-supplying port of the air-conditioning unit and the introduction port of the air-conditioning outlet duct. For example, an air-conditioning air supply duct was placed below the upper plate of the swivel base, and was fixed to the upper plate of the swivel base with a bolt. (For example, patent document 1).

JP 2004-268802 A

  Therefore, in the conventional case, accuracy is required for the positional relationship between the one end side and the other end side of the air-conditioning air supply duct. If the accuracy is low, the air-conditioning unit air-feeding port and the air-conditioning outlet duct inlet port are matched. It may be difficult to install. Further, there is a problem that it becomes impossible to assemble the air supply duct for the air conditioner after wiring various harnesses below the upper plate of the swivel base.

  In view of the above problems, the present invention can be easily attached with one end side and the other end side of an air conditioner air supply duct aligned with an air supply port of an air conditioner unit and an inlet port of an air conditioner outlet duct. An object of the present invention is to provide an air-conditioning air supply duct device that allows an air-conditioning air-supply duct to be easily assembled even after various harnesses are wired below the upper plate of the upper plate.

The technical means of the present invention for solving this technical problem is installed on the swivel base on the driver's seat, the control device in front of the driver's seat, and the unit mounting base constituting the upper plate of the swivel base below the driver's seat. And an air conditioner outlet duct that blows air from the air conditioner unit in front of the driver's seat and on the side of the control device, and below the upper plate of the swivel base, An air-conditioning air supply duct that connects the inlet of the air-conditioning outlet duct is provided,
A work window that can be closed by a step plate is formed on the upper surface of the swivel between the driver's seat and the control device.
The air-conditioning air supply duct is pivoted so as to communicate with the first connection tool attached to communicate with the air-supply inlet of the air-conditioner unit under the unit mounting base from the work window and the air-conditioner outlet duct. It has the point which has the 2nd connection tool attached to a stand, and the air supply hose which connects the 1st connection tool and the 2nd connection tool.

According to another technical means of the present invention, the first connector is provided with a flange which is fixedly fixed to the lower surface of the unit mounting base, and the first connecting tool is disposed on the lower surface of the unit mounting base. There is provided a locking portion that is inserted from and engaged with one end portion of the flange, and the other end portion of the flange is fastened to the unit mounting base from above the work window with a fastener. .
According to another technical means of the present invention, the second connector is provided with a step piece having a communication hole communicating with the introduction port of the air-conditioning outlet duct, and the step piece is substantially the same height as the step plate. The point is that it is detachably fixed to the swivel.

  According to the present invention, one end side and the other end side of an air conditioner air supply duct can be easily attached to match the air supply port of the air conditioner unit and the inlet port of the air conditioner outlet duct, and the upper plate of the swivel base Even after various harnesses are wired below the air conditioner, the air-conditioning air supply duct can be easily assembled.

It is the sectional view on the AA line of FIG. 3 which shows one Embodiment of this invention. It is a right view of the air supply duct apparatus part for the air conditioner. It is a top view of the turntable front part. It is a top view at the side of the air-conditioner unit of the air-conditioning air supply duct. It is a bottom view by the side of the air-conditioning outlet duct of the air-conditioning air supply duct. It is a perspective view of the upper part of the backhoe. It is a perspective view of the upper front part of the backhoe. It is the perspective view which looked at the air supply duct for air conditioners from the front side. It is a top view of the rear part of the swivel. It is a perspective view of the rear part of the swivel base.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In FIG. 6, 1 shows the upper structure of the turning work machine exemplified in the ultra-small turning type backhoe, and the backhoe 1 has a turning table 2 on a crawler type traveling machine body (not shown) via a vertical axis. An excavator (not shown) having a boom, an arm, and a bucket is mounted on the front of the swivel base 2 so as to be freely pivotable.

The swivel base 2 is composed of a swivel board 3 made of a thick plate material, and the bottom part of the swivel base 2 is supported on a traveling device via a swivel bearing so as to be swivelable.
A support bracket 5 for supporting the boom and boom cylinder of the excavator is provided at the front end of the swivel board 3, and the engine 6 shown in FIGS. 9 and 10 is mounted on the rear part of the swivel board 3. A partition wall 8 that partitions the front of 6 forward and backward, and a pair of left and right vertical ribs 9L and 9R that connect the support bracket 5 and the partition wall 8 are provided. The pair of vertical ribs 9L, 9R are parallel to each other and extend rearward, and the rear ends are fixed to the partition wall 8 by welding or the like.

  A bonnet that covers the engine 6 and the like is mounted on the rear part of the swivel base 2, and a driver's seat 11 is disposed on the front side of the bonnet. A control unit 12 having a pedal 28 and the like is provided. The swivel base 2 is equipped with a fall protection device such as Lope so as to surround the control unit 12, or with a cabin so as to surround the control unit 12.

A pair of left and right control tables 13L and 13R are arranged on the left and right sides of the driver's seat 11, and a left operation lever 14L and a right operation lever 14R are provided on the left and right control tables 13L and 13R, respectively. The left operation lever 14L is a turning / arm operation lever, and the right operation lever 14R is a boom / bucket operation lever.
An unloading lever 15 is provided on the left control platform 13L, 13R so as to protrude forward and upward, which is an obstacle to getting on and off, and when the unloading lever 15 is pulled up, a turning arm by the left and right operation levers 14L, 14R, It is configured to disable operation of the boom bucket.

A display panel (meter panel) 16 is provided on the right front side of the driver's seat 11. The display panel 16 is provided in front of the right turret 13R via a support arm that projects forward to the right turret 13R.
An upper plate (step) 19 of the swivel base 2 is provided below and in front of the driver's seat 11. The upper plate (step) 19 of the swivel base 2 includes a unit mounting base 21, a detachable step plate 22, a step piece 23, and a front step plate 24.

  As shown in FIG. 7, a traveling control device 27 having a pair of left and right traveling levers is disposed on the front step plate 24 in front of the driver's seat 11, and on the right side of the traveling control device 27, which is the upper front portion of the swivel base 2. Is provided with a swing pedal (steering pedal) 28 for swinging the working device left and right, and an SP pedal 29 for operating a hydraulic actuator provided separately on the working device is provided on the left side of the traveling control device 27.

As shown in FIG. 6, a step mounting plate 30 protrudes forward or leftward from the partition wall 8 and the left vertical rib 9 </ b> L, and a plurality of supports 31 protrude upward from the front side of the swivel board 3. The upper plate (step) 19 of the swivel base 2 is mounted and fixed on the step mounting plate 30 and mounted and fixed on the plurality of supports 31, and the step 19 is disposed above the swivel substrate 3.
A work window 33 that can be closed by the detachable step plate 22 is formed on the upper surface of the swivel base 2 between the driver's seat 11 and the traveling control device 27.

An air conditioner unit 34 installed on the swivel base 2 below the driver seat 11 on the unit mounting base 21 via the support piece 32 shown in FIGS. 1 and 2, and in front of the driver seat 11 and on the side of the traveling control device 27. On the other hand, an air conditioner outlet duct 35 for blowing air from the air conditioner unit 34 is provided.
An air conditioner air supply duct 36 that connects the air supply port of the air conditioner unit 34 and the inlet port 44 of the air conditioner outlet duct 35 is provided inside the swivel base 2, that is, below the upper plate 19 of the swivel base 2. Yes.

The air conditioner unit 34 includes, for example, an evaporator, an expansion valve, and a blower, cools the introduced air with a refrigerant, and sends the cooling air from the air supply port via the air supply hole 48 of the unit mounting base 21. It is configured.
As shown in FIGS. 6 to 8, the air-conditioner outlet duct 35 is disposed on the front side of the driver's seat 11 and fixed on the upper plate 19 of the swivel base 2, and the first box 39. And a second box 40 projecting inward from the first box 39 toward the control device. The second box 40 is placed on the first box 39 and fixed to each other by welding or the like.

  As shown in FIGS. 1 and 8, the first box 39 is provided with an introduction port 44 that communicates with the air blowing port of the air conditioner unit 34 at the rear portion of the bottom wall 43, and surrounds the introduction port 44 in the bottom wall 43. A ring-shaped seal 45 is fixed. A mounting piece 46 that is attached to the upper plate 19 of the swivel base 2 is provided in the front lower portion of the first box 39 so as to protrude inward. The mounting piece 46 is fixed to the front step plate 24 with bolts, and the introduction port 44 of the first box 39 and the communication hole 47 of the seal 45 are communicated with a communication hole 68 of the step small piece 23 described later. An air outlet 49 for attaching a wind direction guide member to the inner wall of the first box 39 is provided, and air outlets are provided on the upper wall and the rear wall of the inward projecting portion of the second box 40. , 42 are attached.

  As shown in FIGS. 1 to 5, the air supply duct 36 for the air conditioner is attached to the first connection tool 51 attached to the work window 33 so as to communicate with the air supply port of the air conditioner unit 34 below the unit mounting base 21. The second connector 52 attached to the swivel base 2 so as to communicate with the inlet 44 of the air-conditioning outlet duct 35, and the air supply hose 53 that connects the first connector 51 and the second connector 52 are provided. Have.

The first connector 51 is formed in a cylindrical shape bent in an L shape, and a flange 55 is formed on the upper end on one end side of the first connector 51 and is superposed on the lower surface of the unit mounting base 21. A connecting cylinder portion 66 to which the air supply hose 53 is connected is formed to be open forward.
The flange 55 has a communication port 56 that communicates with the blower port of the air conditioner unit 34 and communicates with the first connector 51. A seal 57 having a communication hole 58 corresponding to the communication port 56 is attached to the upper surface of the flange 55.

On the lower surface of the unit mounting base 21, on the back side away from the work window 33, the first connector 51 is inserted from the work window 33 and one end of the flange 55 is inserted and engaged. A portion 59 is provided.
The locking portion 59 is formed by fixing a locking piece 61 to the lower surface of the unit mounting base 21 via a plate piece 60, and a guide inclined portion 62 inclined forward and downward is provided on the distal end side of the locking piece 61. The flange 55 is configured to guide one end portion of the flange 55 to the groove-shaped locking portion 59.

By engaging one end portion of the flange 55 with the engaging portion 59, the first connector 51 can be placed on the unit mounting base 21 and positioning can be performed.
A nut 64 is fixed to the lower surface of the other end portion (front end portion) of the flange 55, and the other end portion of the flange 55 is fastened to the unit mounting base 21 with a bolt or the like that is screwed onto the nut 64 from above the work window 33. The tool 67 is configured to be fastened.

By engaging one end portion of the flange 55 with the locking portion 59 and fastening the other end portion of the flange 55 to the unit mounting base 21, the flange 55 is connected via the communication port 56 of the flange 55 and the communication hole 58 of the seal 45. The 1 connector 51 is detachably fixed to the lower surface of the unit mounting base 21 so as to communicate with the air outlet of the air conditioner unit 34.
The second connector 52 is formed in a cylindrical shape bent in an L shape, and an air conditioning plate 65 inclined upward to the right is provided in the second connector 52, and air from the air conditioner unit 34 is supplied to the air conditioner outlet duct 35. The feed is efficiently sent to the introduction port 44.

  A step piece 23 is provided at the upper end of the second connector 52. On the rear side of the left end portion of the step small piece 23, a mounting piece 54 for mounting the end portion of the detachable step plate 22 is provided in a projecting manner. The step small piece 23 has a communication hole 68 that communicates with the introduction port 44 of the air-conditioning outlet duct 35. In addition, a receiving piece 50 that receives an end portion of the step small piece 23 is provided at the left end portion of the detachable step plate 22.

The step small piece 23 is fixed to the support cylinder 31 with a bolt or the like, and is detachably fixed to the swivel base 2 at substantially the same height as the detachable step plate 22, thereby the communication hole 68 and the seal of the step small piece 23. The second connector 52 is detachably fixed to the swivel base 2 so as to communicate with the inlet 44 of the air-conditioning outlet duct 35 through the communication hole 47 of 45.
The second connecting member 52 is formed with a connecting cylinder portion 70 to which the air supply hose 53 is connected so as to open to the left.

The air supply hose 53 is configured by a bellows hose so as to be bendable and extendable, and one end of the air supply hose 53 is detachably fitted and fixed to the connecting tube portion 66 of the first connection tool 51, The other end of the gas hose 53 is detachably fitted and fixed to the connecting cylinder portion 70 of the second connector 52.
The air-conditioning air supply duct 36 is inserted from the work window 33 to the lower side of the unit mounting base 21 with the first connection tool 51 and the second connection tool 52 connected to both ends of the air supply hose 53, The first connector 51 on the one end side and the second connector 52 on the other end side can be easily attached to the air supply port of the air conditioner unit 34 and the inlet port 44 of the air conditioner outlet duct 35. The air-conditioning air supply duct 36 may be divided and attached in advance from the first connector 51. Even after various harnesses are wired below the upper plate 19 of the swivel base 2, the air-conditioning air-supply duct is provided. 36 can be easily assembled.

Further, the first connector 51 can be easily attached to the unit mounting base 21 by inserting from the work window 33 and inserting and engaging one end portion of the flange 55 with the engaging portion 59.
Further, the second connector 52 is fixed to the swivel base 2 by using a step piece 23 that is detachably fixed to the swivel base 2 at substantially the same height as the detachable step plate 22. It can be simply connected so as to communicate with the inlet 44 of the duct 35.

  9 and 10, a support frame 73 fixed to the swivel board 3 is provided in the bonnet. The support frame 73 is connected to a pair of left and right rear legs 74 and 75, a pair of left and right front legs 76 and 77, and upper ends of the legs 74, 75, 76, and 77, and a bonnet front wall is attached to the support frame 73. The main body is composed of a plate body 78 and is arranged so as to straddle the engine 6, and the lower ends of the rear leg bodies 74 and 75 and the front leg bodies 76 and 77 are fixedly attached to the revolving board 3 via support legs or the like. Has been.

  A cooling fan 80 and a radiator 81 are provided on the right side of the engine 6 in the bonnet, and the cooling fan 80 blows cooling air from the radiator 81 side to the engine 6 side. An air conditioner condenser 82 is arranged on the right side of the radiator 81, and an air conditioner receiver (liquid receiver) 83 is arranged on the right side thereof. An air conditioner compressor 85 is disposed in the vicinity of the engine 6.

A duct that prevents the cooling air from the cooling fan 80 from flowing backward from the engine 6 side to the radiator 81 side is closed between the outer periphery of the radiator 81 and the bonnet by a plurality of closing plates such as the rear closing plate 84. It is configured.
The air conditioner hose 88 is inserted into the front wall of the bonnet, and the air conditioner unit 34 side, the air conditioner condenser 82, the air conditioner receiver 83, and the air conditioner compressor 85 in the bonnet are connected by the air conditioner hose 88 to circulate the refrigerant. It is configured as follows.

  The air conditioner hose 88 includes a first hose body 89 that connects the air conditioner unit 34 and the air conditioner receiver 83, a second hose body 90 that connects the air conditioner unit 34 and the air conditioner compressor 85, an air conditioner compressor 85, and an air conditioner. It has the 3rd hose body 91 which connects capacitor 82, the 4th hose body 92 which connects receiver 83 for an air conditioner, and capacitor 82 for an air conditioner, and these 1st hose bodies 89 and 2nd hose body 90 are The air conditioner unit 34 is inserted into the front wall of the bonnet and disposed in the hood.

  A sponge 94 attached to the rear leg body 75 or the like is provided above the rear closing plate 84, and the first hose body 89 and the third hose body 91 are inserted through the sponge 94, and the engine 6 side in the bonnet and the radiator 81 are inserted. Accordingly, the first hose body 89 and the third hose body 91 are fixed by the sponge 94 to improve the sealing performance, and the sponge 94 is used as a bracket for the first hose body 89 and the third hose body 91. It is trying to become.

Accordingly, by using the sponge 94 in the passage portion of the first hose body 89 and the third hose body 91 in the rear closing plate 84, it becomes possible to make a sealed structure while preventing breakage due to vibration isolation, and improving the cooling performance. Quality can be improved.
The air-conditioning air supply duct device of the present invention can be applied not only to the backhoe 1 but also to excavators and other turning work machines.

1 Backhoe 2 Turntable 11 Driver's Seat 19 Upper Plate (Step)
DESCRIPTION OF SYMBOLS 21 Unit mounting base 22 Detachment step plate 23 Step small piece 27 Traveling control device 33 Work window 34 Air-conditioner unit 35 Air-conditioner outlet duct 36 Air-conditioner air supply duct 51 First connection tool 52 Second connection tool 53 Air-supply hose 55 Flange 59 Locking part 68 Communication hole

Claims (3)

On the swivel base (2), the driver's seat (11), the control device (27) in front of the driver's seat (11), and the upper plate (19) of the swivel base (2) below the driver's seat (11) are configured. An air conditioner unit (34) installed on the unit mounting base (21) and an air conditioner outlet duct for blowing air from the air conditioner unit (34) in front of the driver seat (11) and on the side of the control device (27) (35) is provided, and an air conditioner for connecting the air supply port of the air conditioner unit (34) and the inlet port (44) of the air conditioner outlet duct (35) below the upper plate (19) of the swivel base (2). An air supply duct (36) is provided,
A work window (33) that can be closed by a step plate (22) is formed on the upper surface of the swivel base (2) between the driver's seat (11) and the control device (27),
The air conditioner air supply duct (36) is attached to the work window (33) below the unit mounting base (21) so as to communicate with the air supply port of the air conditioner unit (34). A second connector (52) attached to the swivel base (2) so as to communicate with the inlet (44) of the air-conditioning outlet duct (35), a first connector (51), and a second connector ( 52) and an air supply hose (53) connected to the air conditioner.   The first connector (51) is provided with a flange (55) that is fixed to the lower surface of the unit mount (21). The first connector (51) is provided on the lower surface of the unit mount (21). Is inserted from the work window (33) and one end of the flange (55) is inserted and engaged, and the other end of the flange (55) is attached to the unit mounting base (21). The air supply duct device for an air conditioner for a swing working machine according to claim 1, wherein the air supply duct device is configured to be fastened with a fastener from above the window (33).   The second connector (52) is provided with a step piece (23) having a communication hole (68) communicating with the introduction port (44) of the air conditioner outlet duct (35). The air supply duct device for an air conditioner of a swivel working machine according to claim 1 or 2, characterized in that it is fixed to the swivel base (2) so as to be detachable at substantially the same height as the step plate (22).

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