JP7443294B2 - work equipment - Google Patents

Description

The present invention relates to a working machine such as a small hydraulic excavator (backhoe).

Conventionally, there are working machines equipped with an air conditioner that cools the inside of the cabin.
For example, Patent Document 1 discloses a configuration in which a radiator and an oil cooler are arranged upstream of a fan that takes in cooling air into an engine room, and a condenser for an air conditioner is further arranged upstream of the fan.

Further, Patent Document 2 discloses a configuration in which a concave housing portion for an air conditioner condenser, etc. is provided in the lower part of the rear wall of the cabin from the rear wall toward the cabin.

JP2019-019572A JP2013-244910A

However, in Patent Document 1, since the condenser is disposed at the most upstream side in the flow direction of the cooling air in the engine room, the temperature of the cooling air due to the condenser increases, resulting in a decrease in the cooling performance of the oil cooler and radiator, and There is a problem in that it causes thermal effects on the machine (work machine), such as an increase in the temperature of the machine.
In addition, in the technology of Patent Document 2, the air conditioner condenser housing part is formed to be concave toward the cabin side rather than the rear wall of the cabin, so the space inside the cabin becomes narrow and the livability decreases. It ends up. There is also the problem that heat from the condenser and the like tends to propagate into the cabin via the wall of the air conditioner condenser and the like housing section. Furthermore, since the cooling air that has been heated by cooling the condenser is discharged horizontally, there is also the problem that the hot air is blown out toward workers working behind the work equipment, pedestrians, and the like.

In view of the above-mentioned problems, the present invention suppresses the thermal influence on the working machine due to the condenser of the air conditioner without reducing the comfort of the cabin, and also suppresses the discharge of hot air to workers etc. around the working machine. The purpose is to

The technical means of the present invention for solving this technical problem is characterized by the following points.
The work machine includes a fuselage, a cabin mounted on the fuselage and provided with a driver's seat in which a driver is seated, an engine room disposed below and rearward of the cabin on the fuselage, and the A bonnet center that forms the upper and front parts of the engine room and separates the interior of the cabin from the engine room; a condenser that adjusts the temperature inside the cabin; and a condenser that generates an air flow to cool the condenser. an air conditioner having a fan; and a storage member that accommodates the condenser and the condenser fan, the condenser being arranged in an inclined manner that moves downward toward the rear, and the condenser fan facing toward the rear. The storage member is arranged in an inclined shape that moves downward as it goes toward the rear, and is arranged opposite to the front side of the capacitor to blow air obliquely upward toward the capacitor. a sloped wall formed to face the rear side of the capacitor, a left side wall connected to the left side of the sloped wall, a right side wall connected to the right side of the sloped wall, and a left side wall connected to the left side of the sloped wall; a first intake port that is formed in the right side wall and takes in air from outside the storage member to cool the condenser; and a second intake port that is formed in the right side wall and takes in air from the outside of the storage member to cool the capacitor; an exhaust port provided on the inclined wall and for discharging air diagonally upward after cooling the condenser, and the first intake port and the second intake port are arranged such that oblique sides thereof are along the inclined wall. It is formed into a roughly triangular shape arranged in the .

According to the work machine of the present invention, the condenser of the air conditioner is installed outside the engine room and cabin, thereby suppressing the thermal influence of the condenser of the air conditioner on the machine side without reducing the livability of the cabin. can do. Further, since the cooling air after cooling the condenser can be discharged diagonally upward to the rear, it is possible to prevent hot air from being blown out toward workers and the like around the work machine.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a rear perspective view schematically showing the overall outline of a backhoe that is an example of a working machine of the present invention. FIG. 1 is a left side view schematically showing an outline of a backhoe to which the present invention is applied. FIG. 1 is a right side view schematically showing an outline of a backhoe to which the present invention is applied. 1 is a plan view schematically showing an outline of a backhoe to which the present invention is applied. FIG. 1 is a rear view schematically showing an outline of a backhoe to which the present invention is applied. FIG. 2 is a front perspective view schematically showing the outline of the fuselage, support frame, capacitor, etc. FIG. 2 is a front perspective view schematically showing the outline of a bonnet center, an exterior cover, and the like. FIG. 2 is a side view schematically showing the outline of the fuselage, support frame, capacitor, etc. FIG. 2 is a rear view schematically showing the outline of the fuselage, support frame, capacitor, etc. FIG. 2 is a side view schematically showing an outline of a storage member that covers a capacitor. FIG. 2 is a side view schematically showing the outline of a capacitor, a receiver, an electric fan, and the like. FIG. 2 is a perspective view schematically showing the outline of a capacitor and an electric fan. FIG. 2 is a perspective view schematically showing the outline of a capacitor and an electric fan. FIG. 2 is a rear perspective view schematically showing the outline of a capacitor mounted tiltingly on the bonnet at the rear of the cabin. FIG. 2 is a rear perspective view schematically showing how AC hoses and control wiring are routed. FIG. 3 is a rear perspective view schematically showing a state in which the capacitor bracket is attached to the hood. FIG. 3 is a rear perspective view schematically showing a state in which the capacitor is attached to the bracket. FIG. 2 is a rear perspective view schematically showing a support frame provided with a boss member and a bonnet that covers the support frame.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a working machine 1 of the present invention will be described below based on the drawings.
Note that the embodiment described below is an example of embodying the present invention, and the configuration of the present invention is not limited to the specific example. However, in this embodiment, the explanation will be given using the backhoe 1 as an example.
A backhoe 1 as an example of the working machine 1 is shown in FIGS. 1 to 16 and the like.

In describing this embodiment, the front direction as seen from the driver O seated on the driver's seat 27 in the cabin 5 is defined as the front direction of the backhoe 1, and the rear direction of the driver O is defined as the rear direction of the backhoe 1. Further, the right direction of the driver O is defined as the right direction of the backhoe 1, and the left direction of the driver O is defined as the left direction of the backhoe 1. Further, the horizontal direction perpendicular to the front-rear direction of the backhoe 1 is defined as the body width direction.

Further, in a plan view of the working machine 1, X1 is the pivot axis of the working machine 1. The pivot axis X1 is an axis passing through the center of the pivot bearing 7 and extending in the vertical direction. Further, in a plan view of the work machine 1, Y1 is the center line of the work machine 1. The center line Y1 is a line passing through the pivot axis X1 and extending in the front-rear direction.
As shown in FIGS. 1 to 4, the backhoe 1 includes an upper revolving body 2 and a lower traveling body 3. As shown in FIGS. The upper revolving body 2 has a fuselage 4, a cabin 5, and a working device 6. The upper rotating body 2 (aircraft body 4) is mounted on the lower traveling body 3 so as to be able to rotate around the vertical axis of a swing bearing 7. Further, a weight 8 is provided at the rear of the body 4. The lower traveling body 3 includes a traveling frame 9, a crawler-type traveling device 10, and a dozer device 11. Note that the traveling device 10 may be of a tire type.

A working device 6 is arranged in front of the cabin 5. The working device 6 is attached to the body 4. This working device 6 includes a boom 12 driven by a boom cylinder 17 , an arm 13 driven by an arm cylinder 18 , and a bucket (work tool) 14 driven by a bucket cylinder 19 .
A prime mover 20 is mounted in an engine room 21 provided at the lower rear of the cabin 5 in the fuselage 4 . The prime mover 20 is mounted horizontally in an engine room 21. Note that "horizontally placed" means that the engine 20 is placed so that the axis of the crankshaft of the engine 20 extends in the width direction of the machine body. Note that the mounting position of the prime mover 20 is an example.

In this embodiment, the prime mover 20 is a diesel engine. Note that the prime mover 20 may be a gasoline engine, an LPG engine, an electric motor, or a hybrid type having an engine and an electric motor.
As shown in FIG. 4, in the engine room 21, a prime mover 20, a radiator G1, and an oil cooler O1 are arranged in this order from the center of the backhoe 1 toward the outside in the width direction of the machine body. The radiator G1 is a cooling device that cools the cooling water of the prime mover 20. The radiator G1 is provided with a cooling fan that cools the cooling water passing through the inside of the radiator G1. The oil cooler O1 is a cooling device that cools hydraulic oil.

As shown in FIGS. 1, 2, 3, and 5, the aircraft body 4 is provided with a cabin 5 in which a driver (operator) O can board. The cabin 5 is provided with a front panel 22 on the front, a rear panel 23 on the rear, a roof panel 24 on the top, a side panel 25 on the right side, and a door panel 26 on the left side. There is.
The front panel 22 is provided with a front window 22a. The rear panel 23 is provided with a rear window 23a made of a transparent material. The side panel 25 is provided with a right side window 25a. The door panel 26 is provided with a left side window 26a. Therefore, the driver O inside the cabin 5 can visually check the outside from the indoor space through the front window 22a, the rear window 23a, the right side window 25a, and the left side window 26a.

As shown in FIG. 4, the interior of the cabin 5 is provided with a driver's seat (seat) 27 on which a driver (operator) O is seated, and an operating device 28. The cabin 5 is disposed on the left side of the fuselage 4 in the width direction of the fuselage 4 with respect to a center line Y1 that passes through the rotation axis X1 and extends in the longitudinal direction. A bonnet 29 is provided at the rear of the cabin 5 and extends rearward.
As shown in FIGS. 6 to 16, the bonnet 29 is supported by a support frame 30 provided in the engine room 21, and is shaped to cover the support frame 30. The support frame 30 includes a plurality of leg members (a first leg 31a, a second leg 31b, and a third leg 31c) erected at a position rearward of the partition plate 4e on the rotating board 4a, and these leg members 31a. -31c, and a beam member 32 fixed to the upper part of the beam member 31c.

As shown in FIG. 7, the bonnet 29 includes a bonnet center 29a, a rear bonnet 29b, a left side bonnet 29c, and a right side bonnet 29d. The bonnet center 29a is a cover member that forms the upper part and the front part of the engine room 21, and blocks off the inside (indoor) side of the cabin 5 and the engine room 21 side. The rear bonnet 29b is a cover member that forms the rear part of the engine room, and is attached to the support frame 30. The left side bonnet 29c is a cover member that forms the left side of the engine room 21. The right side bonnet 29d is a cover member that forms the right side of the engine room 21. Each part of the bonnet 29 may be integrally molded of resin, for example, or may be made of sheet metal, or may be a combination of resin and sheet metal.

As shown in FIG. 6 etc., the fuselage 4 includes a rotating board (substrate) 4a, a plurality of vertical ribs (a first vertical rib 4b and a second vertical rib 4c), a support bracket 4d, a partition plate 4e, and a support bracket 4d. It has a frame 30. The rotating board 4a is formed from a thick steel plate or the like, and is arranged so that the plate surface faces in the vertical direction. The swing base plate 4a is rotatably supported on the lower traveling body 3 via a swing bearing 7 about a swing axis X1.

As shown in FIGS. 2, 3, etc., a swing bracket 4f is attached to the support bracket 4d so as to be swingable around a vertical axis (an axis extending in the vertical direction). A base end side of the working device 6 (boom 12) is attached to the swing bracket 4f so as to be rotatable around a horizontal axis.
As shown in FIG. 6 and the like, the partition plate 4e is a member that partitions the front lower part of the engine room 21. As shown in FIG. The partition plate 4e has a plate surface facing in the front-rear direction, and is disposed at the rear of the rotating board 4a from one side (left side) to the other side (right side) in the width direction of the machine body.

As shown in FIG. 6 and the like, the first leg 31a of the support frame 30 includes a first support portion 31a1, a first extension portion 31a2, a first horizontal portion 31a3, and a first vertical portion 31a4. The first support column 31a1 is erected on the front left side of the engine room 21 and extends upward. Specifically, the lower end of the first support portion 31a1 is attached to the left side of the rear surface of the partition plate 4e. The first extending portion 31a2 is bent and extends rearward and upward from the upper end of the first support portion 31a1. The first horizontal portion 31a3 is bent rearward from the upper end of the first extension portion 31a2 and extends horizontally. The first vertical portion 31a4 is bent downward from the tip of the first horizontal portion 31a3 and extends vertically.

As shown in FIG. 6 and the like, the second leg 31b includes a second support portion 31b1, a second extension portion 31b2, and a second horizontal portion 31b3. The second support column 31b1 is erected on the front right side of the engine room 21 and extends upward. Specifically, the lower end of the second support portion 31b1 is attached to the right side of the partition plate 4e. In other words, the lower end of the second support column 31b1 is located further forward than the first support column 31a1. The second extending portion 31b2 is bent and extended rearward and upward from the upper end of the second support portion 31b1. The second horizontal portion 31b3 is bent rearward from the upper end of the second extending portion 31b2 and extends horizontally. Further, the second horizontal portion 31b3 extends horizontally so as to cut through the beam member 32. A boss member 33 is provided in this second horizontal portion 31b3.

As shown in FIG. 6 and the like, the third leg 31c includes a third support portion 31c1 and a third horizontal portion 31c2. The third support portion 31c1 is erected at the rear center of the engine room 21 and extends upward. The third horizontal portion 31c2 is bent forward from the upper end of the third support portion 31c1 and extends horizontally. A boss member 33 is provided in this third horizontal portion 31c2.

As shown in FIG. 6 and the like, the beam member 32 is arranged so that its plate surface faces in the vertical direction and its longitudinal direction faces in the width direction of the machine body. The beam member 32 includes a first beam member 32a and a second beam member 32b. The first beam member 32a is placed across the upper end of the first horizontal part 31a3, the upper end of the second horizontal part 31b3, and the upper end of the third horizontal part 31c2, and is fixed to each of these horizontal parts 31a3, 31b3, and 31c2. ing. Specifically, as shown in FIG. 6 etc., the first beam member 32a extends to the right from the upper end of the first horizontal part 31a3, passes through the third horizontal part 31c2, and reaches the upper end of the second horizontal part 31b3. ing. Further, as shown in FIG. 16 and the like, the second beam member 32b extends rightward from the tip (rear end) of the first extending portion 31a2 and reaches the first vertical portion 31a4.

The backhoe 1 of this embodiment is equipped with an air conditioner (air conditioner) that can adjust the temperature inside the cabin 5.
The air conditioner includes an evaporator, a blower fan, a compressor, a capacitor D1, an electric fan (condenser fan) F1, a receiver R1, and the like. Each of these devices is connected by piping, and the refrigerant flows therethrough.

The evaporator cools the air blown into the cabin by exchanging heat between the refrigerant and the air blown into the cabin from the ventilation fan.
A compressor is a device that compresses vaporized refrigerant. Further, the condenser D1 is a cooling device (condenser) that cools compressed refrigerant. Receiver R1 temporarily stores the condensed refrigerant.

The evaporator and the blower fan are provided on the lower side inside the cabin 5.
In this embodiment, an electric fan F1, a condenser D1, and a receiver R1 of an air conditioner (AC system) are arranged at the rear of the cabin 5 and above the hood center 29a. Further, as shown in FIGS. 2, 3, etc., the upper end of the capacitor D1 is lower than the midpoint between the upper and lower ends of the rear window 23a, and lower than the upper end of the backrest of the driver's seat 27. placed in position. Further, as shown in FIG. 4 and the like, the capacitor D1 is arranged closer to the inside of the fuselage body than the outer edge of the fuselage body 4 in plan view.

As shown in FIGS. 13 to 16, a boss member (bracket support member) 33 is provided at the upper part of the support frame 30, to which a bracket 34 is attached. The boss member 33 is fixed to the support frame 30, passes through the bonnet 29, and supports the bracket 34 above the bonnet 29. The boss member 33 is a cylindrical member and is fixed to the upper part of the support frame 30 by welding. A female thread is formed inside the cylinder of the boss member 33. A bolt B1 is screwed into the boss member 33, and a bracket 34, which will be described later, is fastened thereto.

In this embodiment, a boss member 33 is provided on the second horizontal portion 31b3 of the second leg 31b. Two boss members 33 are provided side by side in a straight line in the front-rear direction. Further, a boss member 33 is provided on the third horizontal portion 31c2 of the third leg 31c. Two boss members 33 are provided side by side in a straight line in the front-rear direction.
As shown in FIG. 13, four circular holes 38 are provided at the rear of the bonnet center 29a. Specifically, the hole 38 is through which the boss member 33 passes, and is formed at a position corresponding to the boss member 33 with a diameter slightly larger than the outer diameter of the boss member 33.

Next, the bracket 34 will be explained. As shown in FIG. 14 and the like, the bracket 34 includes a support member 35 disposed on the bonnet center 29a and a base 36 to which the capacitor D1 is attached.
The support member 35 includes a pair of seal cushions 35a, a support plate 35b, a strut 35c, a first lateral portion 35d, a second lateral portion 35e, a first holding portion 35f, a second holding portion 35g, and a second holding portion 35g. It has a first vertical section 35h and a second vertical section 35i.

As shown in FIGS. 11B, 14, etc., the pair of seal cushions 35a are portions disposed at the upper part of the boss member 33, and are disposed apart from each other in the width direction of the machine body. The pair of seal cushions 35a are plate members that extend in the front-rear direction and have a rectangular shape in plan view. The seal cushion 35a is a seal member for suppressing air in the engine room 21 from being discharged to the outside through the hole 38. A hole 35a1 is formed in the pair of seal cushions 35a at a position corresponding to the boss member 33.

As shown in FIGS. 11A, 11B, 14, etc., the support plate 35b is a long plate member placed on the bonnet center 29a. The support plate 35b is a rectangular plate member extending in the width direction of the aircraft body in a plan view. Of the pair of seal cushions 35a, the support plate 35b extends to the left from the upper surface of the seal cushion 35a on the other side (right end side) in the machine width direction, and extends from the upper surface of the seal cushion 35a on the other side (left end side) in the machine body width direction. 35a.

A hole through which the bolt B1 passes is formed in the support plate 35b at a position corresponding to the boss member 33 (a position corresponding to the hole of the pair of seal cushions 35a). That is, the support member 35 is attached to the support frame 30 by fastening the support plate 35b to the boss member 33 provided on the support frame 30 using bolts B1. That is, the boss member 33 supports the support plate 35b of the support member 35 from the upper part of the beam member 32 through the hole 38 of the bonnet center 29a.

Further, as shown in FIGS. 11A, 11B, 14, etc., a hole 35b1 is formed in the support plate 35b. The hole 35b1 is a circular hole in a plan view, and is provided at a position corresponding to the boss member 33 (a position corresponding to the hole 35a1 of the pair of seal cushions 35a).
Further, in the support plate 35b, a hole 35b2 penetrating in the vertical direction is formed in a region (first region) sandwiched between the pair of seal cushions 35a. Further, a cutout portion 35b3 is formed in a region (second region) on one side (left side) of the one end side (left end side) in the body width direction. The hole 35b2 is a rectangular hole in plan view, and is formed with its longitudinal direction facing the width direction of the body. The cutout portion 35b3 is formed by cutting backward from the front end of the support plate 35b.

The support column 35c is erected from the support plate 35b and extends upward. In this embodiment, the support columns 35c are provided in pairs spaced apart from each other in the width direction of the aircraft body. The left column 35c1 and the right column 35c2 are provided at positions corresponding to the holes 35b1 of the support plate 35b, that is, at positions corresponding to the boss members 33. More specifically, the left column 35c1 and the right column 35c2 are welded to the support plate 35b, and are attached to the boss member 33 by tightening together with the support plate 35b using bolts B1. The left column 35c1 is attached to the front hole 35b1 at one end (left end) of the support plate 35b in the machine width direction, and the right column 35c2 is attached to the front hole 35b1 at the other end (right end) of the support plate 35b in the machine width direction. is attached to the hole 35b1.

Further, as shown in FIGS. 11A, 11B, 14, etc., each of the pillars 35c extends forward along the upper surface of the support plate 35b, bends forward and upward, and bends backward at the upper end. There is.
As shown in FIG. 11A, FIG. 11B, FIG. 14, etc., the first lateral portion 35d is arranged so that its plate surface faces in the up-down direction and extends in the width direction of the fuselage. The first horizontal portion 35d is placed from the upper end of the left column 35c1 to the upper end of the right column 35c2, and is fixed to each of these columns 35c1 and 35c2.

The second lateral portion 35e is disposed so that its plate surface faces in the up-down direction and extends in the width direction of the machine body. The second lateral portion 35e is provided at the rear end of the upper surface of the support plate 35b. A first holding portion 35f and a second holding portion 35g are provided on one side (left side) and the other side (right side) of the second lateral portion 35e in the body width direction, respectively.
The first holding part 35f extends upward from the left side of the second lateral part 35e, and is curved toward the rear and upper part in the middle.

The second holding part 35g extends upward from the right side of the second lateral part 35e, and is curved toward the rear and upper part in the middle.
The first vertical portion 35h is a member that is inclined so as to move downward toward the rear, and to which one end (left end) of the base 36 in the body width direction is attached. The first vertical portion 35h extends rearward from one end (left end) of the first horizontal portion 35d in the fuselage width direction, bends downward, bends in the middle, extends rearward and downward, and extends backward from the first horizontal portion 35d. 1 extending rearward beyond the upper end of the holding portion 35f. The upper end of the first holding part 35f and the lower part of the first vertical part 35h are joined by a joining means such as welding. That is, the upper end of the first vertical part 35h is connected to the left end of the first horizontal part 35d, the lower part of the first vertical part 35h is connected to the upper end of the first holding part 35f, and the first vertical part 35h is connected to the left end of the first horizontal part 35d. , the first horizontal portion 35d and the first holding portion 35f. Further, the midway portion of the first vertical portion 35h is inclined from the upper front to the lower rear when viewed from the side.

The second vertical portion 35i is a member that is inclined so as to move downward toward the rear, and to which the other end (right end) of the base 36 in the body width direction is attached. The second vertical portion 35i extends rearward from near the other end (right end) in the fuselage width direction of the first horizontal portion 35d, bends downward, bends in the middle, and extends rearward and downward. , extends rearward beyond the upper end of the second holding portion 35g. The upper end of the second holding part 35g and the lower part of the second vertical part 35i are joined by a joining means such as welding. That is, the upper end of the second vertical part 35i is connected to the vicinity of the right end of the first horizontal part 35d, the lower part of the second vertical part 35i is connected to the upper end of the second holding part 35g, and the second vertical part 35i is connected to the upper end of the second vertical part 35i. is held by the first lateral portion 35d and the second holding portion 35g. Moreover, the middle part of the second vertical part 35i is inclined from the upper front to the lower rear when viewed from the side.

The base 36 is a flat member to which the capacitor D1 and the electric fan F1 are attached. The base 36 is attached to the inclined portions of the first vertical portion 35h and the second vertical portion 35i so that the plate surface slopes downwardly toward the rear.
Specifically, the left edge of the base 36 is provided with a left attachment portion 36a1 for attaching the base 36 to the first vertical portion 35h. Two left mounting portions 36a1 are provided, one above the other. The left mounting portion 36a1 is provided with a through hole through which the bolt B1 passes. The base 36 is fixed to the first vertical portion 35h by attaching the left attachment portion 36a1 to the first vertical portion 35h via the bolt B1.

Further, two holes 36a3 are formed in the left attachment portion 36a1 to which the left attachment portion D1a1 on the left edge of the capacitor D1 is attached. In this embodiment, the left mounting portion D of the capacitor D1 is
A sheet metal member (not shown) is bolted to the left mounting portion D1a1 using the hole 36a3 formed in 1a1, an elastic member such as rubber is attached to this sheet metal member, and this sheet metal member and the left mounting portion D1a1 are connected between The left mounting portion D1a1 of the capacitor D1 is fixed to the left mounting portion 36a1 of the base 36 by tightening with bolts while sandwiching the elastic member.

A right attachment portion 36a2 for attaching the base 36 to the second vertical portion 35i is provided on the right edge of the base 36. Two right mounting portions 36a2 are provided, one above the other. The right mounting portion 36a2 is provided with a through hole through which the bolt B1 passes. The base 36 is fixed to the second vertical portion 35i by attaching the right attachment portion 36c2 to the second vertical portion 35i via the bolt B1.
Further, two holes 36c4 are formed in the right mounting portion 36c2 to which the right mounting portion D1a2 on the right edge of the capacitor D1 is attached. In this embodiment, a sheet metal member (not shown) is bolted to the left mounting part D1a1 using the hole 36a4 formed in the right mounting part D1a2 of the capacitor D1, and an elastic member such as rubber is attached to this sheet metal member. The right mounting portion D1a2 of the capacitor D1 is fixed to the right mounting portion 36a2 of the base 36 by fastening this sheet metal member and the right mounting portion 36a2 with bolts with the elastic member sandwiched therebetween.

Further, as shown in FIG. 11B, an electric fan F1 is attached to the back side (lower front side) of the base 36. The electric fan F1 is attached so as to be aligned with a through hole 36a5 formed in the center of the base 36. That is, an electric fan F1 for cooling the capacitor D1 is provided on the bonnet 29 and at a position facing the capacitor D1, and the bracket 34 supports the capacitor D1 and the electric fan F1.

In this way, the capacitor D1 is attached to the front side (rear upper side) of the base 36, and the electric fan F1 is attached to the back side (front lower side) of the base 36, so that the capacitor D1 and the electric fan F1 are directed toward the rear. It is installed in an inclined position so that it moves downward. That is, the capacitor D1 is arranged above the bonnet 29 and at a position facing the lower part of the back side of the rear panel 23 of the cabin 5. Further, the capacitor D1 is arranged in an inclined manner such that its upper surface moves downward as it goes rearward. In this embodiment, the capacitor D1 is attached to the front side (rear upper side) of the base 36, and the electric fan F1 is attached to the back side (front lower side) of the base 36, but the present invention is not limited to this. The electric fan F1 may be attached to the front side (rear upper side) of the base 36, and the capacitor D1 may be attached to the back side (front lower side) of the base 36. Further, instead of the electric fan F1, a fan driven by the driving force of an engine, a fan driven by hydraulic pressure, or the like may be provided.

As shown in FIGS. 10A to 11B, a receiver R1 that stores the refrigerant that has passed through the condenser D1 is arranged on the other side (right side) of the condenser D1 in the body width direction in the storage member 44. . The receiver R1 has a cylindrical shape, and in this embodiment, the receiver R1 is arranged to the right of the capacitor D1 and extends in the vertical direction. The receiver R1 is vertically attached to the middle of the second vertical portion 35i via a stay 50. Capacitor D1 and receiver R1 are connected by AC hose 40. The receiver R1 is arranged at a position spaced rearward from the cabin 5 in order to provide a space in which the AC hose 40 is curved and routed.

As shown in FIG. 13, the bonnet 29 is provided with a hole 39 through which an air conditioner hose 40 through which refrigerant for the air conditioner flows and a harness 41 connected to the electric fan F1 are routed. Specifically, the bonnet center 29a is provided with a rectangular hole 39 that communicates the inside and outside of the engine compartment 21. In this embodiment, the hole 39 is arranged in the bonnet center 29a at a position corresponding to the cutout 35b3 of the support plate 35b arranged above the bonnet center 29a. That is, this hole 39 is provided to the left of the hole 38 formed in the center of the bonnet center 29a. Further, the hole 39 is provided closer to the cabin 5 (rear panel 23) than the rear end of the bonnet center 29a.

The hole 39 is connected to the compressor in the bonnet 29 and is used to pass an AC hose 40 through which refrigerant flows and wiring (harness) 41 for controlling an air conditioner (air conditioner).
As shown in FIG. 13 and the like, the AC hose 40 and the wiring 41 are arranged to extend upward from the hole 39. Further, the AC hose 40 and the wiring 41 are arranged to extend rightward along the first lateral portion 35d. AC hose 40 is connected to condenser D1, receiver R1, and sight glass R2. As shown in FIG. 15, the AC hose 40 is routed along the first lateral portion 35d of the bracket 34 by a guide member 43. As shown in FIG. The guide member 43 is a hook-shaped member with a J-shaped cross section, and is attached to the upper part of the capacitor D1.

As shown in FIGS. 13 to 15, the AC hose 40a exits upward from the hole 39, bends to the right, and connects to the capacitor D1 when it reaches the upper right edge of the capacitor D1. An AC hose 40b is connected to the lower right edge of the capacitor D1, and the AC hose 40b is curved upward and connected to the upper end of the receiver R1. Another AC hose 40c is connected to the receiver R1, and the AC hose 40c is arranged in a straight line in the front. Further, the AC hose 40c is provided with a sight glass R2, and the AC hose 40c that has passed through the sight glass R2 is bent to the left, routed along the first lateral portion 35d, and bent downward to form a hole. 39. Note that the sight glass R2 is arranged at substantially the same height as the upper end of the receiver R1, and is arranged so as to be visible from the second opening 45b (second intake port 46b) on the right side. That is, a sight glass R2 for ascertaining the condition of the air conditioner gas is provided at a position that is visible from the outside of the storage member 44 through the intake port 46.

Note that a sealing member 42 made of an elastic material such as rubber is inserted into the square hole 39. The sealing member 42 is mounted in a state where it is pressed down from above by attaching a plate-like member to the supporting member 35, and prevents rainwater, dust, etc. from entering the engine room 21 through the hole 39.
For convenience of explanation, the configuration of the assembled capacitor D1 (capacitor D1, bracket 34, receiver R1, etc.) will be described as a capacitor D1 assembly, as shown in FIG. 15. As shown in FIG. 15, the backhoe 1 has an appearance as if carrying a capacitor D1 assembly on its back.

As shown in FIGS. 1 to 16 and others, the capacitor D1 assembly is covered by a housing member 44 and mounted on the bonnet 29. As shown in FIGS.
In this embodiment, the storage member 44 is a member formed in a triangular shape that is inclined rearward when viewed from the side. The inclined rear surface (the oblique side surface) of the storage member 44 corresponds to the upper surface (the surface side facing rearward (front surface side)) of the capacitor D1. The storage member 44 may be molded of resin or the like, or may be made of sheet metal.

As shown in FIG. 12 and the like, the storage member 44 has a top wall 44a, a left side wall 44b, a right side wall 44c, and an inclined wall 44d. The ceiling wall 44a constitutes the upper part of the storage member 44. The left side wall 44b constitutes the left side of the storage member 44. The right side wall 44c constitutes the right side of the storage member 44. The inclined wall 44d constitutes a rear inclined part of the storage member 44. The top wall 44a, the left side wall 44b, the right side wall 44c, and the inclined wall 44d form a space in which the capacitor D1, receiver R1, etc. are housed.

The inclined wall 44d is an inclined portion corresponding to the upper surface of the capacitor D1. Further, the inclined wall 44d is provided with a third opening 47 corresponding to the upper surface of the capacitor D1.
Further, as shown in FIG. 12 and the like, the storage member 44 has a receiver storage section 44e. The receiver storage part 44e is a cylindrical space larger than the receiver R1, and in this embodiment is arranged on the right side of the inclined wall 44d (third opening 47).

As shown in FIG. 10B, the storage member 44 is attached to the bracket 34. A third attachment portion 44a1 is provided on the ceiling wall 44a. The third attachment portion 44a1 is a portion (hole) for attaching the storage member 44 to the first lateral portion 35d. Specifically, the storage member 44 is attached to the first lateral portion 35d via a second attachment portion 35d1, a third attachment portion 44a1, and a bolt B1 formed on the first lateral portion 35d. The second attachment portion 35d1 is a hole formed in the first lateral portion 35d that is separated from the body in the width direction and penetrates in the vertical direction. It is attached to the first horizontal portion 35d by passing through the attachment portion 35d1.

A fourth mounting portion 44b1 is provided on the left side wall 44b. A fifth attachment portion 44c1 is provided on the right side wall 44c. The fourth attachment portion 44b1 and the fifth attachment portion 44c1 are portions (holes) for attaching the storage member 44 to the support plate 35b. Specifically, the storage member 44 is attached to the support plate 35b via a first attachment portion 35b4, a fourth attachment portion 44b1, a fifth attachment portion 44c1 formed on the support plate 35b, and a bolt B1. The first attachment portion 35b4 is formed at the front portion of the support plate 35b. Specifically, the first attachment portion 35b4 is formed on the front side of the ends (left end and right end) of the support plate 35b in the body width direction. The first attachment portion 35b4 is formed by bending the end portion of the support plate 35b in the body width direction upward. The left side wall 44b and the right side wall 44c are attached to the support plate 35b by inserting bolts B1 into the first attachment part 35b4 and the fourth attachment part 44b1, as well as the first attachment part 35b4 and the fifth attachment part 44c1.

As shown in FIGS. 10A to 12, etc., the storage member 44 includes an opening 45a (first intake port 46a), an opening 45b (second intake port 46b), and It has an opening 47 (exhaust port 48). Specifically, the storage member 44 has an intake port 46 provided on the left and right side surfaces through which air for cooling the capacitor D1 is drawn in by the electric fan F1, and a rear surface formed in an inclined shape that moves downward toward the rear. An exhaust port 48 is provided for discharging the air blown out from the electric fan F1 and after cooling the capacitor D1 obliquely upward to the rear. Further, the surface of the storage member 44 on which the exhaust port 48 is formed is arranged in a slope that moves downward as it goes rearward, and the capacitor D1 is arranged in a slope that moves downward as it goes rearward. The electric fan F1 faces the exhaust port 48, and is arranged on the front side of the capacitor D1 to blow air obliquely upward toward the rear of the capacitor D1.

The air intake ports 46a and 46b are openings through which the electric fan F1 sucks cooling air from the width direction of the body (body width direction), and are formed on the sides of the storage member 44.
Specifically, the left side wall 44b of the storage member 44 is provided with a first opening 45a that opens outward to the left. The first opening 45a serves as a first intake port 46a. The first intake port 46a is formed in a substantially triangular shape, and is arranged so that its oblique side runs along the inclined wall 44d. The right side wall 44c of the storage member 44 is provided with a second opening 45b that opens toward the right outward direction. The second opening 45b serves as a second intake port 46b. The second air intake port 46b is formed in a substantially triangular shape, and is arranged so that the oblique side thereof runs along the inclined wall 44d.

Further, the second intake port 46b has a protruding upper portion. Further, the second intake port 46b is formed across the receiver housing portion 44e. That is, intake ports 46a and 46b are provided on the left and right sides of the capacitor D1 to take in cooling air CA from the outside. A mesh member 49 for dustproofing is attached to these intake ports 46a and 46b.
Specifically, as shown in FIG. 10B, the intake ports 46a and 46b are formed to substantially match the outer shape of the bracket 34. Specifically, the oblique sides of the left and right intake ports 46a, 46b match the inclinations of the first vertical portion 35h and the second vertical portion 35i. The substantially triangular intake ports 46a and 46b communicate with the space on the back side of the capacitor D1. That is, the oblique side of the intake port 46 is located lower and forward than the capacitor D1. The left and right intake ports 46a, 46b take in cooling air CA from the outside into the space behind the capacitor D1. Cooling air CA is taken into the storage member 44 from the left and right intake ports 46a and 46b by the electric fan F1, and is sent to the capacitor D1 as cooling air CA.

Here, to explain the positional relationship between the receiver R1 and the second intake port 46b on the right side, the receiver R1 is arranged on the right side of the capacitor D1, but is arranged at the rear of the cabin 5 with an interval. . Therefore, the receiver R1 is arranged on the rear end side of the second intake port 46b. In other words, the receiver R1 is disposed in a portion of the second intake port 46b that is short in length in the vertical direction, and is therefore arranged so as not to block the opening of the second intake port 46b. Note that the shapes, areas, etc. of the left and right intake ports 46a, 46b are not limited to those illustrated. For example, the left and right intake ports 46a, 46b may have a rectangular shape. Further, the areas of the left and right intake ports 46a and 46b may be set in consideration of the cooling capacity of the capacitor D1.

Further, a third rear opening 47 is formed in the inclined wall 44d, and the opening faces rearward and upward. The third rear opening 47 serves as an exhaust port 48 . The exhaust port 48 is an opening for discharging the air HA after cooling the capacitor D1. The exhaust port 48 is formed from the upper end to the lower end of the inclined wall 44d. This exhaust port 48 is arranged so as to correspond to the upper surface of the capacitor D1.

Specifically, the slanted rear surface of the storage member 44 is provided with a third rear opening 47 that is opened in the rearward-outward direction. After this, the third opening 47 serves as an exhaust port 48 for discharging the air HA after heat exchange in the condenser D1. That is, the exhaust port 48 for discharging the air HA after heat exchange in the condenser D1 is provided facing diagonally upward and behind the condenser D1. The exhaust port 48 is provided on the upper surface side of the capacitor D1. A dustproof mesh member 49 is attached to the exhaust port 48 .

The heat-exchanged air HA that has been sent into the condenser D1 by the electric fan F1 and passed through the condenser D1 is discharged backward and diagonally upward from the exhaust port 48.
As shown in FIGS. 10A, 10B, etc., the AC hose 40 is provided with a sight glass R2 for ascertaining the condition of the air conditioner gas. As shown in FIGS. 10A, 10B, etc., the sight glass R2 is arranged so as to be visible from the protrusion 46b1 of the second intake port 46b on the right side when viewed from the side.

In this embodiment, the sight glass R2 is arranged so as to be visible from the second opening 45b (second intake port 46B) on the right side, but it is only necessary to confirm the sight glass R2 from the outside. The location is not limited to the illustrated location. For example, the receiver R1 may be placed to the left of the capacitor D1, and the sight glass R2 may be placed so that it can be seen from the first intake port 46a on the left side.

As described above, the work machine 1 according to the present embodiment includes a machine body 4, a cabin 5 that is mounted on the machine body 4 and has a driver's seat 27 in which the driver O is seated, and a rear part of the cabin 5. The capacitor D1 is located above the bonnet 29 and faces the bottom of the rear panel 23 of the cabin 5. placed in position.

According to the above configuration, by installing the condenser D1 of the air conditioner outside the engine room 21 and the cabin 5, the thermal influence of the condenser D1 of the air conditioner on the main body side can be reduced without reducing the livability of the cabin 5. can be suppressed. Moreover, compared to the case where the capacitor D1 is arranged in the engine room 21, the maintainability of the capacitor 21 and each member arranged in the engine room 21 can be improved.

Further, the capacitor D1 (or the storage member 44 that accommodates the capacitor D1) is arranged in an inclined manner such that the upper surface (rear surface) moves downward as it goes rearward.
Thereby, the mounting space for the capacitor D1 in the vertical direction can be reduced compared to the case where the capacitor D1 is mounted vertically. For example, the rear window 23a of the rear panel 23 is made of a transparent material, the upper end of the capacitor D1 is lower than the midpoint between the upper and lower ends of the rear window 23a, and the backrest of the driver's seat 27 is It can be placed at a lower position than the top end. Thereby, compared to the case where the capacitor D1 is mounted vertically, it is possible to suppress a decrease in rearward visibility from the driver O seated in the driver's seat 27 through the rear window 23a. Further, when the rear window 23a of the cabin 5 serves as the escape port 37, an area for the driver O to escape through the escape port 37 can be secured even when the capacitor D1 is mounted. Furthermore, since the exhaust heat from the condenser D1 can be exhausted backward and diagonally upward, it is possible to prevent the exhaust from the condenser D1 from directly hitting workers or pedestrians working near the backhoe 1. I can do it. Further, it is possible to suppress the propagation of noise from the electric fan F1 and the like toward the rear of the working machine 1.

Further, compared to the case where the capacitor D1 is mounted horizontally, the space for mounting the capacitor D1 in the front and rear direction can be made smaller. Thereby, the capacitor D1 can be disposed inward of the machine body 4 from the outer edge of the machine body 4 (for example, the outer edge of the weight 8) in plan view, and can be accommodated within the turning radius of the working machine 1.
Further, in this embodiment, the rear edge of the body 4 (weight 8) has an arc shape centered on the rotation axis X1, and the capacitor D1 passes through the rotation axis X1 of the working machine 1 in plan view. Moreover, they are installed evenly on the left and right sides in the width direction of the fuselage centering on the center line Y1 extending in the front-rear direction. Thereby, the capacitor D1 can be arranged inward of the machine body 4 from the outer edge of the machine body 4 (for example, the outer edge of the weight 8) in plan view, and can be appropriately accommodated within the turning radius of the working machine 1.

The right side wall 44c of the storage member 44 (capacitor D1) and the right side wall (side panel 25) of the cabin 5 in the width direction of the aircraft body are substantially the same. Therefore, rear visibility for the driver O using the right side mirror 5a provided in the cabin 5 can be ensured.
Further, the working machine 1 is fixed to a support frame 30 that supports the bonnet 29 within the bonnet 29, a bracket 34 that supports the capacitor D1, and the support frame 30. A bracket support member (boss member 33) is provided above the support member 29.

According to the above configuration, the capacitor D1 can be appropriately supported above the bonnet 29.
Further, the bonnet 29 is provided with a hole 39 through which an AC hose 40 through which refrigerant for an air conditioner flows is routed. Thereby, the AC hose 40 can be appropriately routed between the inside and outside of the engine room 21.

Further, an electric fan F1 for cooling the capacitor D1 is provided on the bonnet 29 and at a position facing the capacitor D1. Thereby, the capacitor D1 can be efficiently cooled.
Further, an electric fan F1 for cooling the capacitor D1 is provided on the bonnet 29 and at a position facing the capacitor D1, and the bracket 34 supports the capacitor D1 and the electric fan F1. Thereby, the capacitor D1 and the electric fan F1 can be appropriately supported above the bonnet 29.

Further, the bonnet 29 is provided with a hole 39 through which an AC hose 40 through which refrigerant for the air conditioner flows and a harness 41 connected to the electric fan F1 are routed. Thereby, the AC hose 40 and the harness 41 can be appropriately routed between the inside and outside of the engine room 21.
The work machine 1 includes a fuselage 4, a cabin 5 which is mounted on the fuselage 4 and has a driver's seat 27 in which a driver O sits, a bonnet 29 disposed on the rear side of the cabin 5, and a cabin. 5, a fan (electric fan F1) that generates an air flow to cool the capacitor D1, and a storage member 44 that accommodates the capacitor D1 and the fan (electric fan F1). , and the storage member 44 includes an intake port 46 provided on the left and right side surfaces and which takes in air for cooling the capacitor D1 from the outside of the storage member 44, and a rear surface formed in an inclined shape that moves downward toward the rear. An exhaust port 48 is provided at the rear side and discharges the air after cooling the condenser D1 diagonally upward. Thereby, the exhaust heat from the capacitor D1 can be exhausted backward and diagonally upward.

Further, the surface of the storage member 44 on which the exhaust port 48 is formed is arranged in a slope that moves downward as it goes rearward, and the capacitor D1 is arranged in a slope that moves downward as it goes rearward. A fan (electric fan F1) facing the exhaust port 48 is disposed on the front side of the capacitor D1 and is configured to blow air obliquely upward toward the rear toward the capacitor D1. Thereby, it is possible to prevent the exhaust air from the capacitor D1 from directly hitting workers, pedestrians, etc. who are working near the backhoe 1.

Further, a sight glass R2 for grasping the condition of the air conditioner gas is provided at a position visible from the outside of the storage member 44 through the intake port 46.
According to the above configuration, the work machine 1 can easily check the status of the sight glass R2.
Further, the work machine 1 includes a support frame 30 that supports the bonnet 29 within the bonnet 29, and a bracket 34 that supports the capacitor D1 and the fan (electric fan F1) above the bonnet 29. A bracket support member 33 is provided on the upper part of the support frame 30 and passes through the bonnet 34 to support the bracket 34 above the bonnet 29. Thereby, the capacitor D1 can be appropriately supported above the bonnet 29.

Further, a receiver R1 for storing refrigerant for an air conditioner is arranged on the side of the condenser D1 in the storage member 44. This allows for a compact arrangement.
The work equipment 1 also includes a body 4, a cabin 5 which is mounted on the body 4 and has a driver's seat 27 in which a driver O sits, and an air conditioner for adjusting the temperature in the cabin 5. The capacitor D1, the support frame 30 that is disposed in the bonnet 29 disposed on the rear side of the cabin 5 and supports the bonnet 29, the bracket 34 that supports the capacitor D1 above the bonnet 29, and the support frame 30. A bracket support member (boss member 33) is fixed and extends through the bonnet 29 to support the bracket 34 above the bonnet 29. As a result, by installing the capacitor D1 outside the engine room 21 and the cabin 5, it is possible to suppress the thermal influence on the main unit side by the capacitor D1 of the air conditioner without reducing the comfort of the cabin 5. . Moreover, compared to the case where the capacitor D1 is arranged in the engine room 21, the maintainability of the capacitor 21 and each member arranged in the engine room 21 can be improved.

Further, the bonnet 29 is provided with a hole 38 through which the bracket support member (boss member 33) passes. Thereby, the upper surface of the bonnet 29 and the upper surface of the bracket support member (boss member 33) can be aligned substantially flush.
It also includes a fan (electric fan F1) that cools the capacitor D1, and the bracket 34 supports the electric fan F1. Thereby, the capacitor D1 and the electric fan F1 can be appropriately supported above the hood 29.

The receiver R1 is also provided to store refrigerant for the air conditioner, and the bracket 34 supports the receiver R1. Thereby, the receiver R1 can be appropriately supported above the bonnet 29.
Further, the bracket support member is a boss member 33 fixed to the upper surface of the support frame 30. Thereby, the bracket 34 can be appropriately supported above the bonnet 29.

The embodiments disclosed this time should be considered to be illustrative in all respects and not restrictive. The scope of the present invention is indicated by the claims rather than the above description, and it is intended that all changes within the meaning and range equivalent to the claims are included. By the way, although the present invention has been explained using the backhoe 1 as an example, it is not limited to the backhoe 1, but can be applied to other construction machines, agricultural machines, etc.

1 Backhoe (work equipment)
2 Upper rotating body 3 Lower traveling body 4 Airframe 5 Cabin 8 Weight 20 Prime mover 21 Engine room 27 Driver's seat (seat)
29 Bonnet 30 Support frame 33 Boss member 34 Bracket 36 Base D1 Capacitor F1 Electric fan R1 Receiver R2 Sight glass

Claims (7)

The aircraft and
a cabin mounted on the aircraft body and provided with a driver's seat in which a driver is seated;
an engine room located below and to the rear of the cabin on the aircraft;
a bonnet center forming an upper and front part of the engine room and partitioning the interior of the cabin and the engine room;
an air conditioner having a condenser that regulates the temperature within the cabin and a condenser fan that generates an air flow to cool the condenser;
A storage member that accommodates the capacitor and the capacitor fan,
The capacitor is arranged in a slope that moves downward toward the rear,
The condenser fan is disposed in an inclined manner that moves downward toward the rear, and is disposed opposite to the front side of the condenser to blow air obliquely upward toward the condenser,
The storage member is formed in an inclined shape that moves downward toward the rear, and includes an inclined wall disposed opposite to the rear side of the capacitor, a left side wall connected to a left side of the inclined wall, and a left side wall connected to the left side of the inclined wall. a right side wall connected to the right side of the storage member; a first intake port formed on the left side wall to take in air from outside the housing member to cool the condenser; and a first intake port formed on the right side wall to cool the condenser. a second intake port that takes in air from the outside of the storage member; and an exhaust port that is provided on the inclined wall and discharges the air after cooling the condenser diagonally upward to the rear;
The working machine is characterized in that the first intake port and the second intake port are formed in a substantially triangular shape with a hypotenuse extending along the inclined wall. A sight glass for grasping the state of the air conditioner gas used in the air conditioner is provided at a position that is visible from the outside of the storage member through the first intake port or the second intake port. The work machine according to claim 1, characterized in that: a support frame that supports the bonnet center within the engine room;
a bracket that supports the capacitor and the capacitor fan above the hood center;
According to claim 1 or 2, the support frame includes a bracket support member that is provided at an upper part of the support frame, passes through the bonnet center, and supports the bracket above the bonnet center. Work equipment described. The working machine according to any one of claims 1 to 3, wherein a receiver for storing a refrigerant used in the air conditioner is disposed on a side of the condenser in the storage member. comprising an undercarriage body and the aircraft body rotatably mounted on the undercarriage body,
The storage member is disposed above the hood center and at a position facing a lower rear side of the rear panel of the cabin,
The rear panel is provided with a rear window made of a transparent material,
5. The storage member according to claim 1, wherein the upper end of the storage member is located lower than a midpoint between the upper and lower ends of the rear window and lower than the upper end of the backrest of the driver's seat. The working machine according to any one of the items above. a rear bonnet forming a rear part of the engine room;
a weight disposed below the rear bonnet;
The working machine according to any one of claims 1 to 5, wherein the storage member is disposed further inside the machine than an outer edge of the weight in plan view. The air conditioner includes a compressor that compresses a refrigerant, a condenser that cools the compressed refrigerant, a condenser fan that blows air to the condenser, a receiver that stores the cooled refrigerant, and a receiver that stores the cooled refrigerant. It has a blower fan that blows air, and an evaporator that exchanges heat between the air blown from the blower fan and the refrigerant,
The evaporator and the blower fan are arranged in a lower part of the cabin, the compressor is arranged in the engine room, and the condenser, the condenser fan, and the receiver are arranged above the bonnet center. The working machine according to any one of items 6 to 6.

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