JP7163272B2 - work machine - Google Patents

Description

TECHNICAL FIELD The present invention relates to a work machine having an air conditioner in a cabin.

2. Description of the Related Art Some work machines such as backhoes are equipped with air conditioners in their cabins in order to improve the driver's comfort.
The cab disclosed in Patent Document 1 has a compressor, a condenser, a receiver, and an air conditioner unit (evaporator) arranged in a cab roof, and the compressor is driven by an electric motor.

JP 2005-240427 A

However, in the technique of Patent Document 1, since the compressor is arranged on the roof, the compressor cannot be driven by the engine of the working machine, and a unique driving device is required.
Therefore, it is conceivable to change the technique of Patent Document 1 to a configuration in which the compressor is arranged near the engine and driven by the engine. There is a problem that deterioration of quality tends to occur.

SUMMARY OF THE INVENTION The present invention has been made to solve the problems of the prior art, and an object of the present invention is to improve the ease of assembly and the quality of assembly in a work machine equipped with an air conditioner.

A specific means for solving the problem in the present invention is a working machine comprising a machine body frame, an engine and a cabin mounted on the machine body frame, and an air conditioner device having a compressor, a condenser, a receiver and an evaporator,
the compressor is located near the engine, the evaporator is located at the bottom of the cabin, the condenser and the receiver are located at the side of the cabin,
A discharge hose that connects the compressor and the condenser and a liquid hose that connects the receiver and the evaporator are arranged along the side surface of the cabin and are held at the lower side surface via a retainer,
The discharge hose has a first discharge hose portion on the compressor side and a second discharge hose portion on the capacitor side, which are divided and connected below the holder,
The liquid hose has a first liquid hose section on the receiver side and a second liquid hose section on the evaporator side, which are divided and connected below the holder.

According to the present invention, the compressor is arranged near the engine, the evaporator is arranged at the bottom of the cabin, and the condenser and the receiver are arranged on the side of the cabin. The discharge hose and the liquid hose connected to the condenser and the receiver can be arranged along the side of the cabin, and the cabin is equipped with the condenser and the receiver, and the discharge second hose The part and the liquid first hose part can be connected and held, assembling the cabin is facilitated, the assembling property and assembling quality of the air conditioner device are improved, and the heat balance and maintainability are also improved.

It is a perspective view seen from the cabin side rear showing the embodiment of the present invention. It is explanatory drawing of an air-conditioner. It is a perspective view which shows the holding structure of a discharge hose and a liquid hose. It is a side view of a backhoe working machine. It is a top view of a backhoe working machine.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings.
4 and 5, the work machine 1 includes a machine body (swivel base) 20 having a body frame 3 at the bottom, a cabin 5 having a driver's seat 22, a crawler type travel device 23, and a work device 24 such as a backhoe. and
Hereinafter, in the embodiments of the present invention, the front-rear direction and the width direction of the machine body 20 and the cabin 5 are the front-rear direction and the left-right direction when viewed from a driver seated in the driver's seat 22 of the work implement 1 . Accordingly, the work device 24 is mounted on the front portion of the machine body 20, the cabin 5 is mounted on the left side and the front side of the machine body 20, and the door 25 is provided on the left side surface. A condenser 7 and a receiver 8 of an air conditioner 10 are attached to the rear upper portion of the right side surface of the cabin 5 .

The body 20 is rotatably supported above the travel device 23 . The fuselage 20 has a fuselage frame 3 and a weight 26 serving as a turning base. The body frame 3 is supported on the frame of the traveling device 23 via a turning bearing, and is turned around a vertical axis (vertical axis) by being driven by a turning motor. The weight 26 is attached to the rear portion of the fuselage 20 .
An engine 4 , a hydraulic pump 27 , a fan 28 , an alternator 29 , a compressor 6 , a radiator 30 and the like are arranged at the rear of the fuselage 20 . Although the engine 4 is a diesel engine in this embodiment, it may be a gasoline engine. The engine 4 is provided with its output shaft (crankshaft, power transmission shaft) directed in the body width direction (horizontal direction).

The hydraulic pump 27 is arranged to the left of the engine 4 . The fan 28 is arranged on the right side of the engine 4 . The alternator 29 is arranged above the right front portion of the engine 4 and outputs DC power to be stored in the battery. The compressor 6 is arranged above the right rear portion of the engine 4 and compresses the refrigerant of the air conditioner 10 that cools the inside of the cabin 5 . The radiator 30 is arranged to the right of the fan 28 and is cooled by driving the fan 28 . The hydraulic pump 27 , the fan 28 , the alternator 29 and the compressor 6 are driven by the power of the engine 4 .

A hydraulic oil tank 34 , a control valve 35 and a battery (not shown) are arranged on the right side of the fuselage 20 and covered with a bonnet 36 . The hydraulic oil tank 34 stores hydraulic oil for operating hydraulic equipment (hydraulic cylinders, etc., which will be described later) provided in the airframe 20 . The hydraulic oil stored in the hydraulic oil tank 34 is delivered by driving the hydraulic pump 27 . A control valve 35 controls the supply of hydraulic oil to the hydraulic equipment.

The traveling device 23 is a crawler-type traveling device, and crawlers 38 are provided on the right and left sides of the body 20, respectively. A dozer device 39 is provided in front of the travel device 23 . The dozer device 39 is raised and lowered by a dozer cylinder 40 .
A support bracket 41 is provided at the front of the body 20 . A swing bracket 42 is pivotally supported on the support bracket 41 . The swing bracket 42 is swingable about the vertical axis by driving a swing cylinder 43 mounted on the body frame 3 . The work device 24 is attached to the swing bracket 42 .

As shown in FIG. 4, the work device 24 has a boom 48, an arm 49, and a work implement 50. As shown in FIG. In this embodiment, a bucket is attached as the working tool 50, but it is possible to attach another working tool (hydraulic attachment) instead of or in addition to the bucket. Other working tools include hydraulic breakers, hydraulic crushers, angle blooms, earth augers, pallet forks, sweepers, mowers, snow blowers, and the like.

Further, the work device 24 has a boom cylinder 51, an arm cylinder 52, and a work tool cylinder 53 as drive mechanisms (hydraulic actuators) for the boom 48 and the like. The boom cylinder 51, the arm cylinder 52, the work implement cylinder 53, the swing cylinder 43, and the dozer cylinder 40 are configured by hydraulic cylinders.
A base end of the boom 48 is pivotally supported by the swing bracket 42 via the first horizontal shaft M1. The boom 48 swings up and down about the first horizontal axis M<b>1 due to the expansion and contraction of the boom cylinder 51 . A base end portion of the arm 49 is pivotally supported by a tip end portion of the boom 48 via a second horizontal shaft (pivotal shaft) M2. As the arm cylinder 52 expands and contracts, the arm 49 swings up and down about the second horizontal axis M2.

The working tool 50 is attached to the tip of the arm 49 via the third horizontal shaft M3 and the bracket 56 . One end of a first link 57 is pivotally supported on the bracket 56 via a fourth horizontal shaft M4. One end of a second link 58 is pivotally supported on the other end of the first link 57 via a fifth horizontal shaft M5. The other end of the second link 58 is pivotally supported near the distal end of the arm 49 and closer to the proximal side than the third horizontal shaft M3 via the sixth horizontal shaft M6. A distal end portion of the work tool cylinder 53 is pivotally supported on the fifth horizontal shaft M5. A base end portion of the work tool cylinder 53 is pivotally supported by a third pivot member 59 which is provided on the base end side of the arm 49 and will be described later. The work tool 50 performs scooping and dumping operations due to expansion and contraction of the work tool cylinder 53 .

The boom 48 has a boom body 60 and a pivot portion 62 . The boom body 60 is bent upward in the middle in the length direction (the direction from the base end to the tip end). That is, the boom body 60 has a bent portion 60a in the middle in the length direction. Further, the boom body 60 is formed in a substantially square tubular shape by left and right vertical plates and upper and lower horizontal plates.
The cabin 5 of the working machine 1 has a pair of left and right front struts 5a, a pair of left and right rear struts 5b, and a left door strut 5c, and is configured by mounting a roof 5d on top of them. The front struts 5a, the rear struts 5b, and the beam members therebetween are formed by connecting individual pipes or by bending the pipes into a substantially gate shape when viewed from the side. It can also be configured in a pillar style.

About half of the front side of the bottom of the cabin 5 is mounted on the fuselage 20, and about half of the rear side is elevated so that it can be arranged above the engine 4. - 特許庁A floor sheet is arranged inside the bottom of the cabin 5, and a driver's seat 22 and control levers are arranged on the upper side thereof.
1 to 3, an air conditioning box 61 is provided at the bottom of the cabin 5 (below the driver's seat 22). A duct 63 for guiding conditioned air is connected.

The condenser 7 of the air conditioner 10 is equipped with an electric fan, and is connected to the adjacently arranged receiver 8 via a connection pipe P, which are arranged in the mounting box 15 .
The mounting box 15 has a fixed frame 15a and a cover, and the fixed frame 15a is mounted on the upper part of the right rear strut 5b on the side of the cabin 5 and/or the right rear part of the roof 5d.

Therefore, the condenser 7 and the receiver 8 are arranged in the rear upper portion of the right side of the cabin 5, and are positioned so as not to impair the driver's view of the outside as much as possible.
A discharge hose D connecting the compressor 6 and the capacitor 7 is divided into a first discharge hose portion D1 on the compressor 6 side and a second discharge hose portion D2 on the capacitor 7 side. The second discharge hose portion D2 on the capacitor 7 side extends downward from the rear portion of the capacitor 7 along the right rear strut 5b, and the lower portion thereof is held by a holder 13 fixed to the lower side surface of the right rear strut 5b. It is

A liquid hose L that connects the receiver 8 and the evaporator 9 is divided into a first liquid hose section L1 on the receiver 8 side and a second liquid hose section L2 on the evaporator 9 side. The second liquid hose portion L2 on the evaporator 9 side extends downward from the upper portion of the receiver 8 along the receiver 8 and the right rear column 5b, and its lower portion is fixedly held by the lower side surface of the right rear column 5b. It is held by a tool 13.

The second discharge hose portion D2 and the second liquid hose portion L2 are arranged substantially in parallel, and the lower portions thereof are attached to the lower side surface of the right rear column 5b by separate holders 13. As shown in FIG. One holder 13 may be used in common.
The first discharge hose portion D1 on the compressor 6 side of the discharge hose D includes a discharge hose base portion D1a extending from the compressor 6 to above the engine 4, and a discharge hose base portion D1a extending from above the engine 4 to the body frame 3 and extending to the cabin 5. It is divided into and connected to the discharge hose intermediate portion D1b extending to the rear lower portion of the side surface.

Therefore, the discharge hose D is divided into three parts: a discharge hose base portion D1a, a discharge hose intermediate portion D1b, and a second discharge hose portion D2.
The discharge hose base portion D1a and the discharge hose middle portion D1b are both arranged near the engine 4 and are protected by a heat-resistant cover or the like. , is turned to the rear lower part of the body frame 3 .

The liquid second hose portion L2 on the side of the evaporator 9, like the discharge hose intermediate portion D1b, is routed to the rear lower portion of the body frame 3 so as to be as far away from the engine 4 as possible, and together with the discharge hose intermediate portion D1b. It extends upward from the lower rear portion of the body frame 3 .
Although the discharge hose D and the liquid hose L can be made of resin hoses over their entire lengths, metal pipes are used partially or appropriately.

In FIG. 3 , an arch frame 64 is fixed to the rear portion of the body frame 3 so as to straddle the engine 4 . The arch frame 64 is equipped with engine-related equipment and supports the rear lower portion of the cabin 5 . A right side portion of the arch frame 64 protrudes outward from the side surface of the cabin 5 and is covered with the bonnet 36 .
The upper right portion of the arch frame 64 substantially corresponds to the lower portion of the right rear strut 5b of the cabin 5. A fixing plate 65 is fixed here, and a mounting member 66 is attached to the fixing plate 65. As shown in FIG. The mounting member 66 holds two connecting pipes (first connecting pipe S1, second connecting pipe S2).

The two connection pipes S1 and S2 are bent upward at one end and bent downward at the other end from a horizontal portion Sa substantially along the upper right upper surface of the arch frame 64 .
The first connecting pipe S1 detachably connects the discharge second hose portion D2 on the side of the capacitor 7 to one end bent upward, and connects the first discharge hose portion D1 on the side of the compressor 6 to the other end bent downward. The first discharge hose portion D1 (intermediate discharge hose portion D1b) on the compressor 6 side and the second discharge hose portion D2 on the capacitor 7 side are detachably connected.

The second connecting pipe S2 detachably connects the liquid first hose portion L1 on the receiver 8 side to one end bent upward, and connects the liquid second hose portion L2 on the evaporator 9 side to the other bent downward end. The first liquid hose portion L1 on the receiver 8 side and the second liquid hose portion L2 on the evaporator 9 side are detachably connected.
The discharge hose intermediate portion D1b connected to the two connecting pipes S1 and S2 and the liquid second hose portion L2 on the side of the evaporator 9 are arranged in parallel along the inner surface of the bonnet 36, and the discharge second hose portion D2 and the first liquid hose portion L1 are attached to the body frame 3 side in separate steps.

Therefore, the engine 4, the compressor 6, the evaporator 9, etc. are assembled to the body frame 3, and the two connection pipes S1, S2, the first discharge hose portion D1, the second liquid hose portion L2, etc. are installed. In a separate process, the condenser 7, the receiver 8, and the like are assembled to the cabin 5, and the second discharge hose portion D2 and the first liquid hose portion L1 are connected and held.

After the cabin 5 is mounted on the body frame 3, the two connection pipes S1 and S2 are connected to the discharge second hose portion D2 and the liquid first hose portion L1.
It is extremely important from the point of view of reliability of connection that the upper ends of the first discharge hose portion D1 and the second liquid hose portion L2 are held on the body frame 3 side via the two connecting pipes S1 and S2. However, the end of the hose itself may be attached to the fixing plate 65 or the attachment member 66 .

The suction hose 67 that connects the evaporator 9 and the compressor 6 is connected at the same time when the first discharge hose portion D1 is connected to the compressor 6 .
The working machine 1 shown in the above embodiment includes a body frame 3, an engine 4 and a cabin 5 mounted on the body frame 3, and an air conditioner 10 having a compressor 6, a condenser 7, a receiver 8 and an evaporator 9. The compressor 6 is arranged near the engine 4, the evaporator 9 is arranged at the bottom of the cabin 5, the condenser 7 and the receiver 8 are arranged at the side of the cabin 5, and the compressor 6 and the discharge hose D connecting the capacitor 7 and the liquid hose L connecting the receiver 8 and the evaporator 9 are arranged along the side surface of the cabin 5 and held at the lower side surface via the holder 13 In the discharge hose D, a first discharge hose portion D1 on the compressor 6 side and a second discharge hose portion D2 on the capacitor 7 side are divided and connected below the holder 13, and the liquid hose At L, the first liquid hose portion L1 on the receiver 8 side and the second liquid hose portion L2 on the evaporator 9 side are divided below the holder 13 and connected.

With this configuration, the condenser 7 and the receiver 8 can be arranged at positions where the cooling efficiency can be improved without increasing the ground clearance of the cabin 5 . Although the cabin 5 has a limited ground clearance up to the top of the roof, since the condenser 7 and the like are not present on the roof, the space above the driver's head can be widened, and the comfortability is improved. Further, by arranging the condenser 7 and the receiver 8 on the side surface of the cabin 5, the discharge hose D and the liquid hose L connected to them can be arranged along the side surface of the cabin 5, and the hose D, It is possible to prevent L from loosening and facilitate hose connection. Furthermore, the condenser 7 and the receiver 8 can be attached to the cabin 5, and the discharge second hose portion D2 and the liquid first hose portion L1 can be connected and held, making it easy to assemble the cabin 5, Assembleability and assembly quality of the air conditioner 10 are improved, and heat balance and maintainability are also improved.

In the working machine 1, the first discharge hose portion D1 includes a discharge hose base portion D1a extending from the compressor 6 to above the engine 4 and a discharge hose base portion D1a extending from above the engine 4 to the body frame 3. It is divided into and connected to the discharge hose intermediate portion D1b extending to the side lower portion of the cabin 5 at the same time.
With this configuration, the discharge hose base portion D1a is arranged on the engine 4 side, and the discharge hose intermediate portion D1b is arranged on the body frame 3 side, and these are arranged and connected individually, so that the discharge hose D can be handled well. , easy connection and easy heat shielding for each hose.

Further, in the work machine 1, a first connection pipe S1 connecting the first discharge hose portion D1 and the second discharge hose portion D2, the first liquid hose portion L1 and the second liquid hose portion L2 are provided. is provided on the body frame 3 side at a position corresponding to the side lower portion of the cabin 5 .
With this configuration, the first connection pipe S1 and the second connection pipe S2 can be stably held on the body frame 3 side. Therefore, the connection between the first connecting pipe S1 and the second connecting pipe S2, the discharge second hose portion D2 and the liquid first hose portion L1 can be easily and reliably connected.

It should be noted that the present invention is not limited to the above-described embodiments, and the shape, configuration, combination, etc. of the members can be changed.
For example, although a backhoe working machine was exemplified as the working machine, a working machine such as a tractor, wheel loader, front loader, combine harvester, or the like may be used as long as it has a cabin and an air conditioner.

Reference Signs List 1 working machine 3 body frame 4 engine 5 cabin 6 compressor 7 condenser 8 receiver 9 evaporator 10 air conditioner 13 holder 20 body 22 driver's seat D discharge hose D1 discharge hose first part D1a discharge hose base D1b discharge hose middle part D2 discharge hose first 2 Hose section L Liquid hose L1 Liquid first hose section L2 Liquid second hose section S1 First connecting pipe S2 Second connecting pipe

Claims (3)

A working machine comprising a body frame, an engine and a cabin mounted on the body frame, and an air conditioner having a compressor, a condenser, a receiver and an evaporator,
the compressor is located near the engine, the evaporator is located at the bottom of the cabin, the condenser and the receiver are located at the side of the cabin,
A discharge hose that connects the compressor and the condenser and a liquid hose that connects the receiver and the evaporator are arranged along the side surface of the cabin and are held at the lower side surface via a retainer,
The discharge hose has a first discharge hose portion on the compressor side and a second discharge hose portion on the capacitor side, which are divided and connected below the holder,
The liquid hose is a working machine in which a first liquid hose section on the receiver side and a second liquid hose section on the evaporator side are divided and connected below the holder. The first discharge hose portion is divided into a discharge hose base portion extending from the compressor to above the engine, and a discharge hose intermediate portion that descends from above the engine to the body frame and extends to the lower side of the cabin. 2. The work machine according to claim 1, wherein the work machine is connected to and connected to the work machine. A first connection pipe that connects the first discharge hose portion and the second discharge hose portion, and a second connection pipe that connects the first liquid hose portion and the second liquid hose portion are connected to the cabin. The working machine according to claim 1 or 2, which is provided on the body frame side at a position corresponding to the side lower part.

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