JP2016188556A - Work machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a work machine where a plurality of hydraulic pipes connected to a control valve can be arranged below the control valve so that the arranged hydraulic pipes can easily be attached.SOLUTION: A work machine includes a machine body, a hydraulic oil tank which is mounted on the machine body, a hydraulic apparatus which is operated by hydraulic oil supplied from the hydraulic oil tank, a valve unit which has a plurality of control valves arranged in parallel for controlling operation of the hydraulic apparatus, a hydraulic pipe which can be connected to the control valve, a first bracket which is arranged on one side in a parallel arrangement direction of the control valve and forms a space to pass the hydraulic pipe below the control valve, and a second bracket which is arranged diagonally to the first bracket on the other side in the parallel arrangement direction of the control valve and forms the space together with the first bracket.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a working machine such as a backhoe.

Conventionally, what was indicated by the following patent documents 1 is known as working machines, such as a backhoe.
In the working machine disclosed in Patent Document 1, a hydraulic oil tank, a fuel tank, a battery, and the like are arranged on a swivel, and a valve unit is arranged long in the front-rear direction above the battery. The valve unit includes a first block and a second block formed by connecting a plurality of control valves in the front-rear direction, and a valve body formed larger in the vertical direction than the first block and the second block. . A valve body is connected to the rear part of the first block, and a second block is connected to the rear part of the valve body. Mounting brackets are arranged at the front lower part of the first block and the rear lower part of the second block.

JP 2006-144456 A

According to this working machine, the mounting brackets are arranged at the front lower part of the first block and the rear lower part of the second block, so that spaces are formed below the first block and below the second block. Therefore, a hydraulic pipe (pilot hose) connected to the control valve can be passed through this space.
However, since no space is formed below the valve body between the first block and the second block, the hydraulic pipe cannot pass therethrough. Therefore, some hydraulic pipes need to be routed without being routed under the control valve, and a space for arranging the bypassed hydraulic pipes is required.

In addition, it is necessary to divide a plurality of hydraulic pipes into a space below the first block and a space below the second block, and the hydraulic pipes that have passed through the two separated spaces spread over a wide range. The assembly work of the hydraulic pipe becomes troublesome.
The present invention has been made to solve the above-described problems of the prior art, and can arrange a plurality of hydraulic pipes connected to the control valve through the lower part of the control valve, It is an object of the present invention to provide a working machine capable of facilitating assembling work of a routed hydraulic pipe.

In order to solve the above problems, the present invention has taken the following technical means.
A work machine according to a first aspect of the present invention controls a machine body, a hydraulic oil tank provided in the machine body, a hydraulic device that operates by hydraulic oil supplied from the hydraulic oil tank, and an operation of the hydraulic device. A valve unit having a plurality of control valves and having the control valves arranged in parallel; a hydraulic pipe connectable to the control valve; and a hydraulic pipe disposed on one side of the control valve in a parallel direction and below the control valve A first bracket that forms a space through which to pass, and a second bracket that is disposed on the other side in the parallel direction of the control valve and that forms the space together with the first bracket. The second bracket is disposed obliquely.

In the working machine according to a second aspect of the present invention, the valve unit is provided on one side in the width direction of the machine body, and the width of the space formed by the first bracket and the second bracket is the machine body. The outside is set larger than the inside in the width direction.
The work machine of the invention which concerns on Claim 3 has a 3rd bracket which supports the center vicinity of the parallel direction of the said valve unit between the said 1st bracket and the said 2nd bracket.

In the work machine according to a fourth aspect of the present invention, the plurality of control valves include a plurality of dozer control valves, and one of the plurality of dozer control valves is near the center in the parallel direction of the valve units. Is arranged.
A work machine according to a fifth aspect of the present invention includes a fourth bracket interposed between the valve unit and the first bracket, and the fourth bracket has a first mounting hole for mounting the valve unit. And a second mounting hole for mounting the first bracket, and the first mounting hole and the second mounting hole are in a position shifted in the parallel direction.

In the work machine according to a sixth aspect of the present invention, the second mounting hole is a long hole extending in the parallel direction.
In the working machine according to the seventh aspect, the first bracket is provided with a hanging metal fitting.

  According to the working machine according to the present invention, the hydraulic pipe connected to the control valve can be routed through a space formed between the first bracket and the second bracket below the control valve. Since the second bracket is disposed obliquely with respect to the first bracket, a plurality of hydraulic pipes passing through a space formed between the first bracket and the second bracket can be brought close to each other and taken out. it can. This makes it possible to easily perform the assembly work of the hydraulic pipe.

It is the perspective view which looked at the turntable from the upper part. It is the figure which removed the valve unit in FIG. It is the figure which looked at the swivel stand which removed the valve unit from diagonally upper left. It is the figure which looked at the valve unit from the lower part. It is an upper perspective view of the support structure of a valve unit. It is a downward perspective view of the support structure of a valve unit. It is AA sectional drawing of FIG. It is the figure which looked at the support structure of the valve unit from the left. It is a top view which shows how to attach a 4th bracket. It is a top view which shows another attachment method of a 4th bracket. It is a perspective view of a valve unit. It is a top view of a switching valve vicinity. It is a rear view of the vicinity of a switching valve. It is an upper perspective view of the support structure of the valve unit of the second embodiment. It is a downward perspective view of the support structure of the valve unit of a second embodiment. It is a top view of a turntable. It is the whole working machine side view.

Hereinafter, a working machine according to the present invention will be described with reference to the drawings as appropriate.
FIG. 17 is a schematic diagram illustrating the overall configuration of the work machine 1 according to the present invention, and illustrates a backhoe that is a turning work machine.
The work machine 1 includes a lower traveling device 2 and an upper machine body (swivel body) 3.
A cabin 12 is mounted on the body 3. As shown in FIG. 16, a driver's seat 4 is provided in the cabin 12. In the embodiment of the present invention, the front side (left side in FIG. 17) of the driver seated on the driver's seat 4 of the work machine 1 is front, the rear side (right side in FIG. 17) is rearward, and the left side of the driver (FIG. The description will be made assuming that the front side of 17 is the left side and the right side of the driver (the back side in FIG. 17) is the right side. Further, the horizontal direction K2 (see FIG. 16), which is a direction orthogonal to the front-rear direction K1, will be described as the body width direction. In addition, the direction from the central part of the airframe 2 toward the right part or the left part will be described as outward of the airframe. In other words, the outward direction of the body is the direction of the body width and away from the body 2. The direction opposite to the outside of the aircraft will be described as the inside of the aircraft. In other words, the in-machine direction is the width direction of the machine body and the direction approaching the machine body 2.

The traveling device 2 includes crawler traveling devices provided on the left and right sides of the body 3. The left traveling device 2 is driven by the left traveling motor ML. The right traveling device 2 is driven by the right traveling motor MR.
A dozer device 7 is attached to the front portion of the traveling device 2. The dozer device 7 has a support arm 8, a blade 9, and a dozer cylinder C1. The dozer cylinder C <b> 1 connects the front part of the traveling device 2 and the support arm 8. The blade 9 is attached to the front portion of the support arm 8. The dozer device 7 can raise and lower the support arm 8 and the blade 9 by expanding and contracting the dozer cylinder C1.

The airframe 3 includes a swivel base 5 supported on the traveling device 2 via a swivel bearing so as to be swiveled around a vertical axis. The swivel base 5 is swiveled by a swivel motor MT. The upper rear part of the swivel base 5 is covered with a bonnet 10. The upper part on the right side of the swivel base 5 is covered with a side cover 11.
A cabin 12 is mounted on the left side of the swivel base 5. The swivel 5 is provided with a support bracket 13 at a slightly right front part in the center of the body width direction. The excavator 6 is attached to the support bracket 13.

  The excavator 6 includes a swing bracket 14, a boom 15, an arm 16, and a bucket 17. The swing bracket 14 is supported by the support bracket 13 so as to be swingable about the vertical axis. A base portion of the boom 15 is pivotally attached to the swing bracket 14 so as to be rotatable about a horizontal axis, and is supported so as to be swingable up and down. The arm 16 is pivotally attached to the distal end side of the boom 15 so as to be rotatable about a horizontal axis, and is supported so as to be swingable back and forth. The bucket 17 is provided on the distal end side of the arm 16 so that a squeeze / dump operation is possible. The work machine 1 is configured to be able to be mounted with another work tool (hereinafter referred to as a hydraulic attachment) that can be driven by hydraulic pressure instead of or in addition to the bucket 17. Examples of the hydraulic attachment include a hydraulic breaker, a hydraulic crusher, an angle bloom, an earth auger, a pallet fork, a sweeper, a mower, and a snow blower.

  The swing bracket 14 is swingable by expansion and contraction of a swing cylinder C2 provided in the swivel base 5. The boom 15 is swingable by expansion and contraction of a boom cylinder C3 interposed between the boom 15 and the swing bracket 14. The arm 16 is swingable by expansion and contraction of an arm cylinder C4 interposed between the arm 16 and the boom 15. The bucket 17 is configured to be freely squeezed and dumped by expansion and contraction of a bucket cylinder C5 interposed between the bucket 17 and the arm 16. The dozer cylinder C1, the swing cylinder C2, the boom cylinder C3, the arm cylinder C4, and the bucket cylinder C5 are configured by hydraulic cylinders (hydraulic equipment).

The boom 15 and the dozer device 7 can be changed to different specifications.
The boom 15 can be changed to a two-piece specification. The two-piece specification is a specification in which the boom 15 is composed of two members, a front boom and a rear boom, and can be bent at a connecting portion between the front boom and the rear boom. In the case of the two-piece specification, separately from the boom cylinder C3, a boom cylinder (referred to as a second boom cylinder) for performing an operation of bending the boom 15 in the middle is additionally mounted.

The dozer device 7 can be changed to an A / D (angle dozer) specification. The A / D specification is a specification that enables the angle operation (swing leftward and rightward) of the dozer device 7. In the case of the A / D specification, an angle cylinder for angle operation is additionally mounted separately from the dozer cylinder C1.
The swivel 5 has a swivel substrate 30 and a step 20. The swivel board 30 is made of a thick plate connected to a swivel bearing. Step 20 is arranged above the revolving substrate 30 with an interval. On the step 20, the driver's seat 4 is arranged.

As shown in FIGS. 3 and 16, the left vertical rib 31 </ b> L and the right vertical rib 31 </ b> R are provided on the revolving substrate 30. The longitudinal ribs 31L and 31R extend from the front part to the rear part in the middle of the machine width direction. The front end portions of the vertical ribs 31 </ b> L and 31 </ b> R protrude forward from the front end portion of the turning substrate 30. A support bracket 13 is provided between the front end portions of the vertical ribs 31L and 31R. The left vertical rib 31L extends in the front-rear direction on the turning substrate 30 through the center of rotation of the body 3 in the front-rear direction. The right vertical rib 31 </ b> R extends from the slightly frontward width direction of the revolving substrate 30 toward the right rear side. The right vertical rib 31 </ b> R has a cutout portion 32 with an upper edge cut out downwardly behind the support bracket 13.

One end of the swing cylinder C2 is connected to the right front portion of the turning substrate 30. The other end of the swing cylinder C2 is connected to the swing bracket 14.
As shown in FIG. 16, an engine room S <b> 1 and a tank room S <b> 2 are formed on the swivel base 5. The engine room S1 is covered with a hood 10. The tank room S2 is covered with a side cover 11.

  An engine E is arranged in the engine room S1. The engine E is provided on the turning board 30 with the crankshaft directed in the body width direction. On the right side of the engine E, a radiator 18 is arranged. An oil cooler 19 is disposed on the right side of the radiator 18. A hydraulic pump 21 is disposed on the left side of the engine E. The hydraulic pump 21 is driven by the engine E. The hydraulic pump 21 has a first pump for supplying hydraulic oil that operates the hydraulic equipment, and a second pump for supplying pilot oil.

  A hydraulic oil tank 22 is disposed in the tank room S2 and in front of the radiator 18 and the oil cooler 19. The hydraulic oil tank 22 stores the hydraulic oil supplied to the hydraulic equipment. As shown in FIGS. 2 and 3, the hydraulic oil tank 22 has a rectangular parallelepiped body portion 22 a that is long in the vertical direction, and an extension portion 22 b that extends forward from the front lower portion of the body portion 22 a. It is formed in an L shape in a side view. A fuel tank 23 is disposed in front of the hydraulic oil tank 22. The fuel tank 23 stores fuel to be supplied to the engine E. The left part of the hydraulic oil tank 22 and the left part of the fuel tank 23 are located above the notch 32 formed in the right vertical rib 31R.

A battery 24 is disposed on the right side of the front part of the hydraulic oil tank 22 and on the right side of the rear part of the fuel tank 23. A valve unit VU is disposed above the battery 24.
As shown in FIGS. 8 and 11, the valve unit VU includes control valves V1 to V13 for controlling the hydraulic oil supplied to the hydraulic equipment, a pressure oil intake inlet block B2, and a pressure oil discharge first outlet block. B1 and the second outlet block B3 are integrated. The control valves V1 to V13, the inlet block B2, the first outlet block B1, and the second outlet block B3 are arranged side by side in the horizontal direction. That is, the valve unit VU is disposed horizontally. The control valves V1 to V13 are arranged in a direction (front-rear direction) orthogonal to the longitudinal direction (spool operation direction).

  In the present embodiment, the control valve V1 is a swing control valve that controls the swing cylinder C2. The control valve V2 is a first control valve for SP that controls the hydraulic attachment. The control valve V3 is a turning control valve that controls the turning motor MT. The control valve V4 is a boom control valve that controls the boom cylinder C3. The control valve V5 is a two-piece control valve that controls the second boom cylinder. The control valve V6 is a bucket control valve that controls the bucket cylinder C5. The control valve V7 is an arm control valve that controls the arm cylinder C4. The control valve V8 is a second control valve for SP that controls the hydraulic attachment. The control valve V9 is a second control valve for dozer that controls the dozer cylinder. The control valve V <b> 10 is a traveling right control valve that controls the traveling motor MR of the right traveling device 5. The control valve V11 is a PPS / PLS control valve for PPS (Pressure of Pump Sensing) signal pressure and PLS (Pressure of Load Sensing) signal pressure. The control valve V12 is a travel left control valve that controls the travel motor MR of the travel device 5 on the left side. The control valve V13 is a first dozer control valve that controls the dozer cylinder.

In this embodiment, in order from the front, the first outlet block B1, the swing control valve V1, the SP first control valve V2, the swing control valve V3, the boom control valve V4, the two-piece specification control valve V5, and the bucket Control valve V6, arm control valve V7, SP second control valve V8, dozer second control valve V9, travel right control valve V10, inlet block B2, PPS / PLS control valve V11, travel left control valve V
12, the first control valve V13 for dozer and the second outlet block B3 are arranged in this order.

  The number and types of control valves constituting the valve unit VU can be changed according to the specifications of the work machine 1. The two-piece specification control valve V5 is a valve used in the case of the two-piece specification, and is not used in the case of the standard specification. That is, in the case of the standard specification, the number of control valves (number of sections) is reduced by one. In the case of the A / D specification, an A / D specification control valve for controlling the angle cylinder is used instead of the two-piece control valve V5.

  Swing control valve V1, SP first control valve V2, turning control valve V3, boom control valve V4, two-piece specification control valve V5, bucket control valve V6, SP second control valve V8, travel right Each of the control valve V10, the travel left control valve V12, the dozer first control valve V13, and the second outlet block B3 is provided with a connecting portion on the outer side (right side) of the machine body. As shown in FIGS. 4 and 8, each connection portion has connection pipes J1 to J6, J8, J10, J12, J13, JB3 for connecting pilot hoses (hydraulic hoses for pilot pressure) as hydraulic pipes. It is connected. Each connection pipe is bent downward from each connection portion, and then extends downward from the valve unit VU toward the body (left side). Lower portions of the valve units VU of the connecting pipes J1 to J6, J8, and J10 extend in parallel with the body width direction. The lower part of the valve unit VU of the connecting pipes J12, J13, JB3 extends obliquely so as to go forward as it goes inward of the machine body, substantially parallel to a second bracket 36 described later.

  As shown in FIG. 4, a pilot hose H1 for connecting to the swing pilot valve is connected to the connecting pipe J1 connected to the swing control valve V1. A pilot hose H2 for connecting to the SP pilot valve is connected to the connection pipe J2 connected to the SP first control valve V2. A pilot hose H3 for connecting to the turning / arm pilot valve is connected to the connecting pipe J3 connected to the turning control valve V3. A pilot hose H4 for connecting to the boom / bucket pilot valve is connected to the connecting pipe J4 connected to the boom control valve V4. A pilot hose H5 for connecting to a boom / bucket pilot valve is connected to the connecting pipe J5 connected to the two-piece control valve V5. A pilot hose H6 for connecting to the boom / bucket pilot valve is connected to the connecting pipe J6 connected to the bucket control valve V6. A pilot hose H8 for connecting to the SP pilot valve is connected to the connection pipe J8 connected to the SP second control valve V8. A pilot hose H10 for connecting to the traveling pilot valve is connected to the traveling right control valve V10. A pilot hose H12 for connecting to the traveling pilot valve is connected to the traveling left control valve V12. A pilot hose H13 for connecting to the dozer pilot valve is connected to the first dozer control valve V13. A pilot hose HB3 is connected to the second outlet block B3.

As shown in FIG. 16, operation levers 25 </ b> L and 25 </ b> R are provided on the left and right sides of the driver's seat 4. Each operation lever 25L, 25R is connected to a pilot valve (not shown) operated by the operation lever.
The pilot valve attached to the left operation lever 25L is a turning / arm pilot valve. The turning / arm pilot valve is connected to the turning control valve V3 and the arm control valve V7 via pilot hoses H3 and H7. The turning / arm pilot valve is operated by the left operation lever 25L to operate the turning control valve V3 and the arm control valve V7.

  The pilot valve attached to the right operation lever 25R is a boom / bucket pilot valve. The boom / bucket pilot valve is connected to the boom control valve V4 and the bucket control valve V6 via pilot hoses H4 and H6. The boom / bucket pilot valve is operated by the right operation lever 25R to operate the boom control valve V4 and the bucket control valve V6.

A dozer lever 26 is provided on the right side of the driver's seat 4. The dozer lever 26 is a lever for operating the dozer device 7. The dozer lever 26 is connected to a dozer pilot valve operated by the lever. The dozer pilot valve is connected to the first dozer control valve V13 via a pilot hose H13.
In front of the driver's seat 4, traveling levers 54 </ b> L and 54 </ b> R, a swing pedal 56 and an SP pedal 57 are provided. The left travel lever 54L is a lever for operating the left travel device 2. The right travel lever 54R is a lever for operating the right travel device 2. The swing pedal 56 is a pedal that swings the swing bracket 17. The SP pedal 57 is a pedal for operating a hydraulic attachment attached instead of the bucket 20.

  The travel levers 54 </ b> L and 54 </ b> R are disposed in front of the driver seat 4. The travel levers 54L and 54R are connected to a travel pilot valve below the step 20. The traveling pilot valve is connected to the traveling right control valve V10 and the traveling left control valve V12 via pilot hoses H10 and H12. The traveling pilot valve is operated by the left and right traveling levers 54L and 54R, thereby controlling the traveling right control valve V10 and the traveling left control valve V12. Traveling pedals 55L and 55R are provided in front of the driver's seat 4, and the traveling device 2 can be operated by the traveling pedals 55L and 55R.

  The swing pedal 56 is disposed on the right side of the travel levers 54L and 54R. The swing pedal 56 is connected to a swing pilot valve located below the step 20. The swing pilot valve is connected to the swing control valve V1 via a pilot hose H1. The swing pilot valve is operated by the swing pedal 56 to control the swing control valve V1.

  The SP pedal 57 is disposed on the left side of the travel levers 54L and 54R. The SP pedal 57 is connected to an SP pilot valve (not shown) below the step 20. The SP pilot valve is connected to the SP first control valve V2 and the SP second control valve V8 via pilot hoses H2 and H8. The SP pilot valve is operated by the SP pedal 57 to control the SP first control valve V2 and the SP second control valve V8.

  As shown in FIGS. 2, 8, etc., the battery 24 is supported on the turning substrate 30 by a support base 27. The support 27 includes a front leg portion 27A, a rear leg portion 27B, a lower plate portion 27C, a front plate portion 27D, a rear plate portion 27E, a back plate portion 27F, a front upper plate portion 27G, and a rear upper plate portion 27H. . The front leg portion 27 </ b> A and the rear leg portion 27 </ b> B are spaced apart from each other in the front-rear direction, and the lower end portion is fixed on the turning substrate 30. The lower plate portion 27C is a portion on which the battery 24 is placed, and is provided in parallel with the turning substrate 30 across the front leg portion 27A and the rear leg portion 27B. The front plate portion 27D is provided above the front leg portion 27A and in front of the battery 24. The rear plate portion 27E is provided above the rear leg portion 27B and behind the battery 24. The back plate portion 27F is provided on the left side (inside the aircraft) of the battery 24, and connects the left edges of the front plate portion 27D, the rear plate portion 27E, and the lower plate portion 27C. A substantially U-shaped cutout 27I is formed in the back plate portion 27F. The front upper plate portion 27G is fixed to the upper end portion of the front plate portion 27F and the upper end portion of the back plate portion 27F, and extends forward and rearward of the front plate portion 27F. The portion extending forward is located above the fuel tank 23, and the portion extending backward is located above the battery 24. The rear upper plate portion 27H is bent from the upper end portion of the rear plate portion 27E and extends forward, and is located above the battery 24.

As shown in FIGS. 1 and 16, the valve unit VU is provided on one side (right side) of the body 3 in the width direction. The valve unit VU is supported above the battery 24 by the support member 33. The front part of the valve unit VU is located above the fuel tank 23. The rear part of the valve unit VU is located above the extending part 22 b of the hydraulic oil tank 22.
The support member 33 includes a support plate 34, a first bracket 35, a second bracket 36, a third bracket 37, and a fourth bracket 38.

As shown in FIGS. 4 and 8, the support plate 34 supports the lower surface of the valve unit VU.
As shown in FIGS. 2 to 6, the support plate 34 is a rectangular flat plate in a plan view, and is arranged with the long side facing the front-rear direction and the short side facing the body width direction. The support plate 34 and the valve unit VU are fixed by bolts. The support plate 34 is above the extended portion 22b of the hydraulic oil tank 22, the rear portion of the fuel tank 23, and the battery 24, and to the left of the front upper plate portion 27G and the rear upper plate portion 27H of the support base 27 (inside the body) )). As shown in FIGS. 5 and 6, a first plate 39 is fixed to the rear part of the bottom surface of the support plate 34. The first plate 39 extends leftward and rearward of the support plate 34, and a hanging bracket 40 made of an eyebolt is attached to the upper surface. In addition, a pair of long holes 41 extending in the front-rear direction are formed in the front portion of the support plate 34. The pair of long holes 41 are arranged side by side in the body width direction. These long holes 41 are provided below first mounting holes 38A of a fourth bracket 38 described later.

As shown in FIGS. 4 to 6, 8, etc., the first bracket 35, the second bracket 36, and the third bracket 37 support the lower surface of the support plate 34.
As shown in FIGS. 4 to 6, the first bracket 35 includes an inner bracket 35 </ b> A located on the inner side of the machine body and an outer bracket 35 </ b> B located on the outer side of the machine body. The inner bracket 35A and the outer bracket 35B have a horizontal plate portion 35a and a pair of vertical plate portions 35b. The upper surface of the horizontal plate portion 35 a is in contact with the lower surface of the support plate 34. The pair of vertical plate portions 35b extend downward from one side edge and the other side edge of the horizontal plate portion 35a.

  The inner bracket 35A and the outer bracket 35B extend in a direction orthogonal to the parallel direction of the control valves V1 to V13 (machine width direction), and are arranged with a gap G1 in the machine width direction. As shown in FIG. 6 and the like, the gap G1 is provided at a position overlapping one of the long holes 41 (on the body side) formed in the support plate. The inner bracket 35A and the outer bracket 35B are connected by a front connecting member 42 disposed in front of the brackets 35A and 35B.

The inner bracket 35 </ b> A has an end on the inboard side (left side) protruding from the left edge of the support plate 34, and an end on the outer side (right side) of the body is located below the support plate 34. The outer bracket 35A has an end on the inboard side (left side) located below the support plate 34 and on the right side of the inner bracket 35A, and an end on the outer side (right side) of the airframe is on the right side of the support plate 34. Protrudes from the edge.
As shown in FIG. 3, the end of the inner bracket 35A on the inboard side is located above the right portion of the support bracket 13 provided at the front of the swivel base 5, and the support bracket 13 and the bolt BL1. It is connected by. A cylindrical spacer 43 is interposed between the inner bracket 35 </ b> A and the support bracket 13.

As shown in FIGS. 4-6, the inner bracket 35A is formed with a long hole 35c extending in the front-rear direction. The long hole 35 c is provided at a position that overlaps the other (outside the machine body) long hole 41 formed in the support plate 34.
As shown in FIGS. 2 and 3, the end of the outer bracket 35 </ b> B on the outer side of the machine body is positioned above the front part of the front upper plate 27 </ b> G of the support base 27. It is connected. A cylindrical spacer 44 is interposed between the outer bracket 35B and the front upper plate 27G.

  As shown in FIG. 5 and the like, a hanging metal fitting 45 made of an eyebolt is attached to an end of the inner bracket 35 </ b> A on the left (inside the body) side. The inner bracket 35A has a high rigidity because it is formed of a rigid material into the shape described above. By attaching the suspension fitting 45 to the inner bracket 35A (first bracket 35) having high rigidity, the attachment portion of the suspension fitting 45 can be prevented from being damaged when the valve unit VU, which is a heavy object, is lifted. Moreover, since it is not necessary to provide a separate member for attaching the hanging bracket 45, the number of parts can be reduced and the weight can be reduced. Further, since the hanging metal fitting 45 can be attached in a state where the valve unit VU is assembled to the first bracket 35, the workability is excellent.

As shown in FIGS. 5 and 8, the second plate 46 is fixed to the upper surface of the outer bracket 35 </ b> B. The second plate 46 extends forward from the support plate 34 on the right side (outside the body). A suspension fitting 47 is attached to the upper surface of the front portion of the second plate 46.
As shown in FIG. 5, FIG. 6, etc., the second bracket 36 has a horizontal plate portion 36a and a pair of vertical plate portions 36b. The upper surface of the horizontal plate portion 36 a is in contact with the lower surface of the support plate 34. The pair of vertical plate portions 36b extend downward from one side edge and the other side edge of the horizontal plate portion 36a. The second bracket 36 is disposed obliquely with respect to the first bracket 35. Specifically, the second bracket 36 extends obliquely with respect to the orthogonal direction (machine width direction). More specifically, the 2nd bracket 36 is extended diagonally so that it may go ahead as it goes to the body side.

  The end of the second bracket 36 on the outer side (right side) of the body projects from the right edge of the support plate 34, and the end of the body side (left side) projects from the left edge of the support plate 34. As shown in FIG. 2, the end of the second bracket 36 on the outer side of the machine body is located above the rear upper plate 27H of the support base 27 and is connected to the rear upper plate 27H by a bolt BL3. . As shown in FIG. 8, a cylindrical spacer 48 is interposed between the second bracket 36 and the rear upper plate 27H. As shown in FIGS. 2 and 3, the end of the second bracket 36 on the inboard side is connected to the support column 48 by a bolt BL4. The support column 48 has a lower end portion fixed to the swivel 5 and an upper end portion fixed to the second bracket 36. The support column 48 is erected on the left side of the vertical rib 31 </ b> R and in front of the hydraulic oil tank 22. Since the second bracket 36 extends obliquely so as to go forward as it goes toward the inside of the machine body, the support column 48 is erected in front of the hydraulic oil tank 22 while avoiding interference with the hydraulic oil tank 22. can do.

The first bracket 35 is disposed on one side (front side) of the control valves V1 to V13 in the parallel direction. The second bracket 36 is disposed on the other side (rear side) of the control valves V1 to V13 in the parallel direction. That is, the first bracket 35 and the second bracket 36 are separated in the front-rear direction in the parallel direction of the control valves V1 to V13.
The first bracket 35 and the second bracket 36 form a space S for passing a hydraulic pipe (pilot hose) below the control valve. Specifically, as shown in FIGS. 8 and 4, the first bracket 35 and the second bracket 36 are located below the support plate 34 and have a space S between the first bracket 35 and the second bracket 36. Forming. Therefore, the space h can be routed through the pilot hoses H1 to H6, H8, H10, H12, H13, and HB3, and there is no need to route the pilot hose by bypassing the valve unit VU.

  Further, as described above, it is disposed obliquely with respect to the first bracket 35. Specifically, the first bracket 35 extends toward the body width direction, and the second bracket 36 extends obliquely toward the front as it goes toward the body. As a result, the first bracket 35 and the second bracket 36 gradually move away from each other toward the outside of the machine body, and the space S gradually increases. That is, the width of the space S formed by the first bracket 35 and the second bracket 36 is set to be larger on the outer side than on the inner side in the width direction of the body 3. Therefore, a plurality of pilot hoses H1 to H6, H8, H10, H12, H13, and HB3 are arranged from the outer side of the body (outside in the width direction of the body) toward the inner side of the body (inside in the width direction of the body). , It can be easily passed through the space S.

  Further, as shown in FIG. 4, the plurality of pilot hoses can be directed obliquely forward by passing the pilot hoses along the second bracket 36 toward the inward side of the body and through the space S. it can. That is, the second bracket 36 functions as a guide that determines the direction of the pilot hose. As a result, the plurality of pilot hoses that have passed through the space S are taken out toward each other and obliquely forward on the inward side of the body. As a result, it is possible to easily perform the assembling work of connecting the plurality of pilot hoses taken out from the space S to the pilot valve.

As shown in FIGS. 5, 6, etc., the first bracket 35 and the second bracket 36 are connected by a first connecting member 49 and a second connecting member 50.
The first connecting member 49 connects the left end of the first bracket 35 (the inward end of the machine body) and the left end of the second bracket 36. The first connecting member 49 is a rod-shaped member and extends in the front-rear direction.

  The second connecting member 50 connects a midway portion in the length direction (extending direction) of the first bracket 35 and a midway portion in the length direction (extending direction) of the second bracket 36. The second connecting member 50 has a horizontal plate portion 50a and a pair of vertical plate portions 50b. As shown in FIGS. 6 and 7, the horizontal plate portion 50 a is provided below the lower surface of the support plate 34 with a gap G <b> 2 from the lower surface. The pair of vertical plate portions 50b extend upward from the front end portion and the rear end portion of the horizontal plate portion 50a, respectively. One of the pair of vertical plate portions 50 b is connected to the first bracket 35, and the other is connected to the second bracket 36. Pilot hoses H1 to H6, H8, H10, H12, H13, and HB3 can be passed through the gap G2 between the horizontal plate portion 50a of the second connecting member 50 and the lower surface of the support plate 34.

The 1st connection member 49 and the 2nd connection member 50 are formed from rigid materials, such as a metal.
As shown in FIGS. 4 to 6 and the like, the third bracket 37 is disposed between the first bracket 35 and the second bracket 36. Specifically, the third bracket 37 is disposed behind the inner bracket 35 </ b> A of the first bracket 35 and in front of the second bracket 36 on the in-vehicle side.

The third bracket 37 has a horizontal plate portion 37a and a pair of vertical plate portions 37b. The upper surface of the horizontal plate portion 37 a is in contact with the lower surface of the support plate 34. The pair of vertical plate portions 37b extend downward from one side edge and the other side edge of the horizontal plate portion 37a. The third bracket 37 extends in a direction orthogonal to the parallel direction of the control valves V1 to V13 (machine width direction).
As shown in FIGS. 2 and 3, the end of the third bracket 37 on the outer side (right side) of the machine body protrudes from the right edge of the support plate 34. The end of the third bracket 37 on the outer side of the machine body is connected to the front upper plate 27G of the support base 27 by a bolt BL5. As shown in FIG. 8, a spacer 51 is interposed between the third bracket 37 and the front upper plate 27G.

  As shown in FIGS. 4 and 6, the end of the third bracket 37 on the inboard side (left side) is located below the support plate 34 and to the left of the second connecting member 50. The end is obliquely cut out substantially parallel to the second bracket 36. Accordingly, when the pilot hoses H1 to H6, H8, H10, H12, H13, and HB3 are passed through the space S, the third bracket 37 is not hindered.

  As shown in FIGS. 4 and 8, the third bracket 37 supports the vicinity of the center in the parallel direction of the valve unit VU at the portion below the support plate 34 (the end on the inward side of the machine body). Accordingly, the front portion of the valve unit VU is supported by the first bracket 35, the rear portion is supported by the second bracket 36, and the vicinity of the center (near the center of gravity) is supported by the third bracket 37. If the valve unit VU is supported only at the front part and the rear part, the support plate 34 and the valve unit VU may be deformed near the center in the parallel direction to cause oil leakage. In order to prevent this deformation, it is necessary to take measures such as increasing the thickness of the bracket in order to increase the rigidity of the bracket. However, when the plate thickness of the bracket is increased, the space S decreases, so that it is difficult to pass all pilot hoses through the space S. On the other hand, in the present invention, since the vicinity of the center in the parallel direction of the valve unit VU is supported by the third bracket 37, the valve unit VU can be supported near the center of gravity in addition to the front and rear portions. Deformation is prevented from occurring.

Specifically, the third bracket 37 supports the vicinity below the second control valve V9 for the dozer among the control valves V1 to V13 constituting the valve unit VU. The two dozer sections (first dozer control valve V13 and second dozer control valve V9) in the valve unit VU distribute the signal output from one dozer pilot valve to the two sections V13 and V9. Therefore, it is not necessary to arrange two pilot hoses toward the pilot valve side for the dozer. Therefore, as shown in FIG. 4, it is not necessary to pass the pilot hose below the second control valve V9 for the dozer in the vicinity of the center of the valve unit VU, and even if the third bracket 37 is arranged, it does not get in the way. That is, since the third bracket 37 is disposed at a position that supports the vicinity of the lower portion of the second control valve V9 for dozer, the third bracket 37 prevents the pilot hose from passing through the space S while preventing the valve It becomes possible to prevent deformation of the unit VU.

  As shown in FIG. 8, the fourth bracket 38 is interposed between the valve unit VU and the first bracket 35. Specifically, the fourth bracket 38 is interposed between the lower surface of the first outlet block B1 and the swing control valve V1 at the front of the valve unit VU and the upper surface of the first bracket 35. As shown in FIGS. 5 and 8, a cylindrical spacer 52 is interposed between the fourth bracket 38 and the first bracket 35.

As shown in FIG. 9, the fourth bracket 38 is an elongated flat plate-like member, and has a first attachment portion 38A and a pair of second attachment portions 38B. The first attachment portion 38A is attached to the valve unit VU. The second attachment portion 38B is attached to the first bracket 35.
The first attachment portion 38A extends in the orthogonal direction (machine width direction) and has a pair of first attachment holes 38a. The pair of first mounting holes 38a are circular holes for fixing the valve unit VU with bolts, and are formed at intervals in the orthogonal direction.

  The pair of second attachment portions 38B extends from both end portions of the first attachment portion 38A in the parallel direction. The pair of second mounting portions 38B extend in the same direction (forward direction in the case of FIG. 9). The pair of second attachment portions 38 </ b> B has second attachment holes 38 b for attachment to the first bracket 35. The 2nd attachment hole 38b consists of a long hole extended in the said parallel direction (front-back direction). The second mounting hole 38b and the first mounting hole 38a are at positions shifted in the parallel direction (front-rear direction).

  The valve unit VU is disposed on the fourth bracket 38, and the bolt BL6 (see FIG. 4) is inserted into the first mounting hole 38a from below, whereby the fourth bracket 38 and the valve unit VU are fixed. The bolt BL6 can be inserted from below the support plate 34 using the long hole 41, the long hole 35c, and the gap G1. Further, as shown in FIG. 9, the bolt insertion hole 35d and the second mounting hole 38b formed in the first bracket 35 (the inner bracket 35A and the outer bracket 35B) are overlapped with each other, and from above the second mounting hole 38b. The fourth bracket 38 and the first bracket 35 are fixed by inserting the bolts.

The first bracket 35, the second bracket 36, the third bracket 37, and the fourth bracket 38 are formed of a rigid material such as metal.
The number and size of sections (control valves) of the valve unit VU are changed depending on the specifications of the work machine 1. There are three types of specifications of the work implement 1, for example, a standard specification, a two-piece specification, and an A / D (angle dozer) specification, and the number and size of sections of the valve unit VU differ depending on each specification.

  In terms of the number of sections, the two-piece specification and the A / D specification have one more section than the standard specification. Specifically, in the two-piece specification, a control valve (in the above embodiment, the two-piece specification control valve V5) for controlling the second boom cylinder is added to the standard specification. In the A / D specification, a control valve for controlling the angle cylinder is added to the standard specification.

Regarding the size of the section, the two-piece specification has a larger section than the A / D specification. Specifically, the control valve for controlling the second boom cylinder is larger than the control valve for controlling the angle cylinder.
As described above, the number and size of sections of the valve unit VU vary depending on each specification. Therefore, conventionally, it is necessary to prepare three types of brackets interposed between the valve unit VU and the first bracket 35 in order to correspond to the above-described three types of specifications. On the other hand, in this invention, it becomes possible to respond | correspond to three specifications with one type of bracket by using the 4th bracket 38 which consists of the said structure.

When it corresponds to the standard specification, as shown in FIG. 10, it arrange | positions so that the 2nd attachment part 38B may extend ahead, and the 2nd attachment hole 38b is located ahead of the 1st attachment hole 38a. Thereby, the attachment position (first attachment hole 38a) with respect to the valve unit VU is located behind the attachment position (second attachment hole 38b) with respect to the first bracket 35.
When the two-piece specification and the A / D specification are supported, as shown in FIG.
8 is turned over from the state of FIG. 10 so that the second mounting portion 38B extends rearward, and the second mounting hole 38b is positioned rearward of the first mounting hole 38a. Thereby, the attachment position (first attachment hole 38a) with respect to the valve unit VU is in front of the attachment position (second attachment hole 38b) with respect to the first bracket 35. Therefore, it is possible to cope with the two-piece specification and the A / D specification in which one section is more than the standard specification.

The use of the correspondence to the two-piece specification and the correspondence to the A / D specification can be performed by changing the front and rear positions of the fourth bracket 38 with respect to the first bracket 35 using the second mounting hole 38b. Since the second mounting hole 38b is a long hole extending in the front-rear direction, the position of the bolt insertion hole 35d with respect to the second mounting hole 38b can be shifted in the front-rear direction.
Specifically, when it corresponds to the two-piece specification, the bolt insertion hole 35d is positioned behind the second mounting hole 38 as shown in FIG. When it corresponds to the A / D specification, the fourth bracket 38 is shifted rearward from the state shown in FIG. 9, and the bolt insertion hole 35d is positioned in front of the second mounting hole 38b. In this way, by adjusting the front / rear position of the fourth bracket 38 with respect to the first bracket 35, the number of sections is the same, but both the two-piece specification with a large section and the A / D specification with a small section are supported. Can do.

Even when the front and rear positions of the fourth bracket 38 with respect to the first bracket 35 are changed, the first mounting hole 38a is formed from below the support plate 34 by providing the elongated hole 41, the elongated hole 35c, and the gap G1. Bolts can be inserted into the.
A switching valve 60 that can be connected to a control valve constituting the valve unit VU is arranged above the valve unit VU. The switching valve 60 is a three-way switching valve. The switching valve 60 has an inlet port 61, a first outlet port 62, a second outlet port 63, and an operation handle 64. The switching valve 60 can switch the destination of the hydraulic oil introduced from the inlet port 61 to the first outlet port 62 or the second outlet port 63 by switching the operation handle 64.

A return oil passage 65 is connected to the inlet port 61. A first oil passage 66 is connected to the first outlet port 62. A second oil passage 67 is connected to the second outlet port 63. As a result, the switching valve 60 can switch the connection destination of the return oil passage 65 to either the first oil passage 66 or the second oil passage 67.
The return oil path 65 is an oil path for returning the hydraulic oil from the hydraulic equipment to the hydraulic oil tank 22, and includes a connector 65A, a pipe joint 65B, and a hydraulic hose 65C. The connection tool 65 </ b> A is connected to the inlet port 61 of the switching valve 60. The pipe joint 65B connects the connecting tool 65A and the hydraulic hose 65C. The hydraulic hose 65C connects the pipe joint 65B and the hydraulic device.

  The first oil passage 66 is composed of a first pipe material. The first pipe member has a first connector 66A, a connection pipe 66B, and a pipe joint 66C. The central axis of the pipe joint 66C and the connecting pipe 66B is arranged in the vertical direction. The first connector 66 </ b> A is connected to the first outlet port 62 of the switching valve 60. One end (upper end) of the pipe joint 66C is connected to the lower portion of the first connector 66A, and the other end (lower end) is connected to one end (upper end) of the connection pipe 66B. One end (upper end) of the connection pipe 66B is connected to the other end (lower end) of the pipe joint 66C, and the other end (lower end) is connected to the inlet port at the upper part of the control valve V8. The first connector 66A, the connection pipe 66B, and the pipe joint 66C are formed of a rigid material such as metal.

  The second oil passage 67 is composed of a second pipe material. The second pipe member has a second connection tool 67A, a third connection tool 67B, and a pipe 67C. The second connector 67 </ b> A is connected to the second outlet port 63 of the switching valve 60. The third connector 67B is provided in an oil path that returns from the outlet port of the control valve V4 to the hydraulic oil tank 31. The pipe 67C connects the second connector 67A and the third connector 67B. The second connector 67A, the third connector 67B, and the pipe 67C are made of a rigid material such as metal. The pipe 67C is formed in a substantially L shape, and includes a horizontal portion extending from the second connection tool 67A toward the body side and a vertical portion bent from the horizontal portion and extending downward to the third connection tool 67B. Have.

The third connector 67B and the outlet port of the control valve V4 include a first connection pipe 68, a pipe joint 69,
The second connection pipe 70 and the connection tool 71 are connected. The first connection pipe 68 has one end connected to the outlet port of the control valve V4 and the other end connected to the pipe joint 69. The pipe joint 69 connects the other end of the first connection pipe 68 and the connection tool 71. The second connection pipe 70 has one end connected to the connection tool 71 and the other end connected to the third connection tool 67B.

  A hydraulic hose 73 is connected to the third connector 67B via a pipe joint 72. The hydraulic hose 73 is connected to the hydraulic oil tank 22. When the switching valve 60 connects the return oil path 65 and the second oil path 67, the hydraulic oil that has passed through the return oil path 65 passes through the second oil path 67 without entering the valve unit VU. The hydraulic hose 73 is entered and returned to the hydraulic oil tank 22. When the switching valve 60 connects the return oil path 65 and the first oil path 66, the hydraulic oil that has passed through the return oil path 65 enters the inlet port of the control valve V8.

  The switching valve 60 is supported above the valve unit VU by the first pipe material that forms the first oil passage 66. Since the first pipe material (the first connector 66A, the connection pipe 66B, and the pipe joint 66C) that forms the first oil passage 66 is formed of a rigid material, the switching valve 60 does not require a special support member. Can be supported above the control valve constituting the valve unit VU (in this embodiment, above the control valve V8). Moreover, since the 2nd pipe material (2nd connection tool 67A, 3rd connection tool 67B, and pipe 67C) which forms the 2nd oil path 67 is also formed from the rigid material, the 1st pipe material which forms the 1st oil path 66 At the same time, the switching valve 60 can be supported above the valve unit VU.

As shown in FIG. 13, the rotation shaft 64a of the operation handle 64 of the switching valve 60 is arranged in the vertical direction.
When the rotating shaft of the operation handle of the switching valve is arranged in the horizontal direction (see, for example, FIG. 7 of Patent Document 1), a switching force (force required for switching) is applied to prevent the valve from switching due to its own weight. It needs to be set larger. Therefore, the force required when the operator performs a switching operation increases. On the other hand, in the present invention, since the rotation shaft 64a of the operation handle 64 of the switching valve 60 is arranged in the vertical direction, the valve is not switched by its own weight. Therefore, it is not necessary to set a large switching force of the switching valve, and the operator can easily perform the switching operation.

  Further, when the rotation shaft 64a of the operation handle 64 of the switching valve 60 is arranged in the vertical direction, the operation direction of the operation handle 64 is the same as the screw direction of the pipe joint 66B, and the operation handle 64 is operated (rotated). There is a possibility that the thread of the pipe joint 66B is loosened. However, in the present invention, since the second pipe material (particularly the pipe 67C) constituting the second oil passage 67 is made of a rigid material, even if the operation handle 64 is rotated, the rotation can be transmitted to the pipe joint 66B. In addition, the screw of the pipe joint 66B does not loosen.

The upper part of the switching valve 60 can be covered with an upper cover (not shown). In this case, if the rotation shaft of the operation handle 64 is disposed in the horizontal direction, the operation handle 64 and the upper cover may interfere with each other. Therefore, in order to prevent this interference, the handle must be formed short, and the force required for the operation increases. On the other hand, in the present invention, since the rotation shaft 64a of the operation handle 64 of the switching valve 60 is arranged in the vertical direction, sufficient operation force can be avoided while preventing the operation handle 64 from interfering with the upper cover. It is possible to secure a handle length that can be obtained. Moreover, as shown in FIG. 13, by tilting the tip end portion of the operation handle 64 downward, it is possible to more reliably achieve avoidance of interference with the upper cover and securing of the handle length.
<Second embodiment>
14 and 15 show a second embodiment of the present invention. Hereinafter, with respect to the second embodiment, main changes to the above-described embodiment will be described. The same components as those in the above-described embodiment are denoted by the same reference numerals and description thereof is omitted.

In the second embodiment, the first bracket 35 is formed of one member. That is, the inner bracket 35A and the outer bracket 35B of the above-described embodiment (see FIGS. 5 and 6) are integrated. The first bracket 35 extends in a direction orthogonal to the parallel direction of the control valves V1 to V13 (machine body width direction).
The end of the first bracket 35 on the outer side of the body projects from the right edge of the support plate 34, and the end on the side of the body projects from the left edge of the support plate 34. The end of the first bracket 35 on the outer side of the machine body is connected to the front upper plate 27 </ b> F of the support base 27. The end of the first bracket 35 on the inward side of the machine body is connected to the support bracket 13.

  Holes for attaching suspension fittings are provided in the end of the first bracket 35 on the inboard side and the end of the outer side of the body, respectively. Thus, by setting it as the structure which can attach a suspension metal fitting to the both ends of the 1st bracket 35, the 2nd plate 46 for attaching the suspension metal fitting of the above-mentioned embodiment is omissible. In addition, by attaching the hanging bracket to the highly rigid first bracket 35 also on the outer side of the fuselage, the mounting portion of the hanging bracket can be more reliably damaged when lifting the heavy valve unit VU. Can be prevented.

  In the embodiment described above, the elongated hole 35c is formed in the inner bracket 35A. However, in this modified embodiment, a rectangular hole 35e is formed instead of the elongated hole 35c. In the above-described embodiment, the pair of long holes 41 is formed in the support plate 34. However, in this modified embodiment, one rectangular hole 41a is formed instead of the pair of long holes 41. The rectangular hole 35e and the rectangular hole 41a are provided at overlapping positions, and are positioned below the first mounting hole 38a of the fourth bracket 38.

  As mentioned above, although this invention was demonstrated, it should be thought that embodiment disclosed this time is an illustration and restrictive at no points. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

DESCRIPTION OF SYMBOLS 1 Work implement 3 Machine body 22 Hydraulic oil tank 34 Support plate 35 1st bracket 36 2nd bracket 37 3rd bracket 38 4th bracket 38a 1st attachment hole 38b 2nd attachment hole 45 Hanging bracket S Space V1-V13 Control valve V9 Dozer Second control valve V13 Dozer first control valve VU Valve unit

Claims (7)

The aircraft,
A hydraulic oil tank provided in the airframe;
Hydraulic equipment that operates by hydraulic oil supplied from the hydraulic oil tank;
A valve unit having a plurality of control valves for controlling the operation of the hydraulic equipment and in parallel with the control valves;
A hydraulic pipe connectable to the control valve;
A first bracket disposed on one side of the control valve in the parallel direction and forming a space for passing a hydraulic pipe below the control valve;
A second bracket disposed on the other side of the control valve in the parallel direction and forming the space together with the first bracket;
With
The working machine, wherein the second bracket is disposed obliquely with respect to the first bracket. The valve unit is provided on one side in the width direction of the aircraft,
2. The work machine according to claim 1, wherein a width of the space formed by the first bracket and the second bracket is set to be larger on the outer side than on the inner side in the width direction of the machine body.   The work machine according to claim 1 or 2, further comprising a third bracket between the first bracket and the second bracket that supports the vicinity of the center of the valve unit in the parallel direction. The plurality of control valves include a plurality of dozer control valves,
4. The work machine according to claim 3, wherein one of the plurality of dozer control valves is disposed near a center in a parallel direction of the valve units. A fourth bracket interposed between the valve unit and the first bracket;
The fourth bracket has a first mounting hole for mounting the valve unit and a second mounting hole for mounting the first bracket;
The work machine according to claim 4, wherein the first mounting hole and the second mounting hole are in a position shifted in the parallel direction.   The work machine according to claim 5, wherein the second mounting hole is a long hole extending in the parallel direction.   The work machine according to any one of claims 1 to 6, wherein a hanging bracket is provided on the first bracket.

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