JPH10292425A - Backhoe - Google Patents

Abstract

(57) [Problem] To provide a link mechanism for interlockingly connecting a traveling control lever and a traveling control valve in consideration of the configuration and arrangement of a control valve formed by coupling and fixing control valves for controlling various hydraulic devices. Provide a backhoe for simplicity. SOLUTION: The traveling control valve B3, B5 for controlling a traveling hydraulic motor is linked with a traveling control valve B3, B5 via a link mechanism in front of a driver's seat on a swivel table 6 to swing back and forth. A control valve provided with operation levers 23L and 23R, and a control valve 32 in which control valves B1 to B9 for controlling various hydraulic devices are provided in a direction perpendicular to the operation directions of the spools S1 to S9 in the swivel base 6, The control valve 32 is divided into a first control valve 32A including traveling control valves B3 and B5 and a second control valve 32B.
A is arranged on the side of the traveling operation levers 23L and 23R and the operation direction of the spool is in the front-rear direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a backhoe.

[0002]

2. Description of the Related Art Conventionally, as a backhoe, a swivel is provided on a traveling device so as to be swivelable about a vertical axis, and a swing bracket is supported at the front of the swivel so as to swing left and right.
A boom is swingably supported by the swing bracket, an arm is swingably supported at the end of the boom, and a bucket is swingably supported at the end of the arm. Is provided with a dozer, and these swing brackets, booms, arms, buckets, and dozers are swung by hydraulic cylinders. The traveling device includes a pair of left and right traveling bodies of a rubber crawler type, and these traveling bodies and the swivel table are driven by a hydraulic motor. Further, a hydraulic take-out unit is provided to drive a hydraulic attachment such as a hydraulic breaker attached in place of the bucket.

A control valve for controlling the swing bracket, a boom, an arm, a hydraulic cylinder for a bucket, a dozer, a hydraulic motor for a traveling body and a turntable, and a hydraulic attachment is a direct-acting spool type switching valve. The control valve is overlapped and connected in a direction orthogonal to the sliding direction of the spool to form an integral control valve,
In a small backhoe, due to space limitations, the control valves are provided at the front left side of the swivel so that the control valves are arranged in the front-rear direction.

[0004]

In the above-mentioned conventional vehicle, left and right traveling control levers for operating hydraulic motors of left and right traveling bodies are provided in front of a driver's seat so as to be swingable back and forth.
The hydraulic motor is driven by swinging the travel operation lever back and forth, but the control valves are provided so that the arrangement direction of each control valve is the front and rear direction. Are operated to slide in the left-right direction, and a link mechanism for interlocking the spool of the travel control valve and the travel operation lever is complicated.

Therefore, by arranging the control valves so that the arrangement direction of each control valve is the left-right direction, the sliding operation direction of the spool of the traveling control valve is matched with the swing direction of the traveling operation lever. There is a demand to simplify the link mechanism. However, in a small backhoe, the inside of the swivel base is provided with strength members for supporting the swing bracket in the front-rear direction, Since the swing motor and the swivel joint are arranged in the central portion, it is difficult to arrange the control valves such that the arrangement direction of each control valve is the left-right direction.

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above circumstances, and has as its object to provide a backhoe that simplifies a link mechanism that interlocks a traveling control lever and a traveling control valve. .

[0007]

The technical means taken by the present invention to achieve the above object is to provide a swivel supported on a traveling device so as to be able to swivel, and an operation provided on the swivel. In front of the seat, is provided a traveling operation lever that is swingably operated back and forth and is interlocked and connected via a link mechanism with a control valve that controls a traveling hydraulic motor. In a backhoe provided with a control valve having a traveling control valve to be controlled provided in a direction orthogonal to a spool operating direction, the control valve is divided into a first control valve including a traveling control valve and a second control valve. The first control valve is arranged on the side of the traveling operation lever so that the operation direction of the spool is in the front-rear direction. .

A turning operation lever for operating a control valve for controlling a turning hydraulic motor of the turning table is provided on the side of the driver's seat, which is operated to swing left and right, and a second control valve is provided. It is preferable to include a turning control valve and to arrange the spool so that the operation direction of the spool is the left-right direction.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIGS. 3, 4 and 5 show the overall structure of a small-sized backhoe 1.
And a traveling device 3 below. The traveling device 3 includes a pair of left and right traveling members 4 of a rubber crawler type, and the left and right traveling members 4 are connected to a frame.
The crawler belts of the left and right traveling bodies 4 are driven forward and reverse by a hydraulic motor M1 to be circulated and run. A dozer 5 is provided at the front of the frame of the traveling device 3 so as to be vertically swingable. The dozer 5 is provided by a hydraulic cylinder interposed between the dozer 5 and the frame of the traveling device 3. It is configured to swing up and down.

The revolving unit 2 includes a revolving base 6 supported by the traveling device 3, an excavating device 7 supported on the front of the revolving platform 6, and a revolving platform 6.
It is mainly constituted by a driver's seat 8 and a four-post canopy 9 provided above. The revolving base 6 is provided on a base member 10 constituting a bottom portion, and is arranged in the front-rear direction. The main structure is such that the upper surface, left and right side surfaces and the front surface are covered with a cover made of a resin plate or a steel plate, and the inside is hollow.

At the rear of the swivel 6, a partition 12 serving as a partition of an engine room is erected, and a weight for balancing weight is provided. Behind the partition 12, an engine and a radiator are provided. , A hydraulic pump, an air cleaner, a hydraulic oil tank, a fuel tank, and the like are attached to an attachment member on the base member 10, and a hood 13 that covers the rear of the engine and the like is attached to the partition 12 so as to be openable and closable. A cover body 14 that covers both the left and right sides is attached and fixed.

An outer race of a bearing is fixed to the base member 10, and an inner race of the bearing is fixed to a frame of the traveling device 3, and the base member 10 is supported rotatably around a vertical axis. And the base member 1
A hydraulic motor M2 that drives a drive gear that meshes with an internal gear provided on the inner peripheral side of the inner race of the bearing that supports the base member 10 is fixed to the center side on the center 0. The hydraulic motor M2 turns the hydraulic motor M2. The table 6 can be turned.

At the front ends of the left and right main frame members 11 of the swivel 6,
The support bracket 15 is fixed.
5, a swing bracket 16 is supported so as to be able to swing left and right around the vertical axis, and the swing bracket 16 is a hydraulic cylinder interposed between the swing bracket 16 and the rear portion of the right main frame member. It is configured to swing right and left.

The excavator 7 has a main structure including a boom 17, an arm 18 and a bucket 19. The boom 17 is supported by a swing bracket 16 so as to be swingable around a left-right axis. A bucket 19 is supported at the distal end side of the boom 17 so as to be swingable about the left-right axis, and the bucket 19 is supported at the distal end side of the arm 18 about the left-right axis via a pivot shaft and a link mechanism. I have.

The boom 17 is mounted on the swing bracket 1.
The arm 18 is swung by the expansion and contraction of a boom cylinder 20 interposed between the boom 17 and the middle part of the boom 17, and the arm 18 is expanded and contracted by an arm cylinder 21 interposed between the middle part of the boom 17 and the arm 18. Rocked by the bucket 19
Is swung by a bucket cylinder 22 interposed between the arm 18 and the link mechanism, and the boom cylinder 2
0, the arm cylinder 21 and the bucket cylinder 22 are constituted by hydraulic cylinders.

On the front surface of the swivel table 6 or on the tip side of the arm 18, there is provided a hydraulic take-out portion for operating a hydraulic attachment or the like which is attached in place of the bucket 19. The driver's seat 8 includes a partition 12 at the rear of the turntable 6.
A pair of left and right traveling operation levers 23L and 23R for separately operating the left and right traveling bodies 4 is provided in front of the driver's seat 8 in front of the driver's seat 8 and operated on both left and right sides of the driver's seat 15. Tables 24L and 24R are arranged.

An operating lever 24 for the bucket boom for operating the boom cylinder 20 and the bucket cylinder 22, an operating lever 26 for the dozer for operating the dozer 5, and an operating lever 25 for the bucket boom are provided on the right operating console 24R.
And a lock lever 27 for locking the lock. On the other hand, on the left operating table 24L, a turning / arm operating lever 2 for operating the hydraulic motor M2 and the arm cylinder 21 is provided.
8 and a lock lever 29 for locking the turning / arm operation lever 28.

On the right side of the traveling operation levers 23L, 23R, there is provided an SP operation pedal 30 for operating a hydraulic attachment or the like, and the traveling operation levers 23L, 23R are provided.
A swing operation pedal 31 for operating a hydraulic cylinder that swings the swing bracket 16 is provided on the left side of the swing bracket 16. As shown in FIGS. 1 and 2, a control valve 32 for controlling the various hydraulic devices is provided in the swivel 6. The control valve 32 includes a first control valve 32A and a second control valve 32A.
B, and control valves B1 to B9 each comprising a direct-acting spool type switching valve for controlling each hydraulic device are connected and fixed in a direction orthogonal to the operation (sliding) direction of the spools S1 to S9.

The first control valve 32A is disposed on the front left side of the swivel 6 so that the operating directions of the spools S1 to S6 are in the front-rear direction. The first control valve 32A controls the boom cylinder 20 in order from the right. A control valve B1, a bucket control valve B2 for controlling the bucket cylinder 22,
The right traveling control valve B3 for controlling the hydraulic motor M1 of the right traveling body 4, the SP control valve B4 for controlling the hydraulic attachment, the left traveling control valve B5 for controlling the hydraulic motor M1 of the left traveling body 4, and the arm cylinder 21. An arm control valve B6 to be controlled is connected and fixed, and is fixed to a mount 46 fixed to the base member 10. Boom control valve B1, bucket control valve B
2. Spools S1, S2, S of arm control valve B6
6 is a rearward projecting shape, and is a control valve B3 for right traveling.
The spools S3, S4, and S5 of the SP control valve B4 and the left traveling control valve B5 are formed to project rearward. The left and right traveling operation levers 23L and 23R, the SP operation pedal 30, and the swing operation pedal 31 are disposed forward of the first control valve 32A in the front-rear direction.

The second control valve 32B is provided with a spool S7-
9 are arranged so that the operation direction is the left-right direction,
A swing control valve B7 for controlling a hydraulic cylinder that swings the swing bracket 16 and a hydraulic motor M in order from the front.
A swing control valve B8 for controlling the hydraulic cylinder 2 and a dozer control valve B9 for controlling a hydraulic cylinder that swings the dozer 5 are connected and fixed, and are fixed on a mounting table 47 fixed to the base member 10. Each control valve B7, B8, B
Nine spools S7, S8, and S9 project leftward.

As shown in FIGS. 6 to 8, left and right operation levers 23L and 23R and a left and right control valve B are provided.
3 and B5 are linked to each other via link mechanisms 33 and 34. A link mechanism 33 for interlocking the right traveling control lever 23R and the right traveling control valve B3 is provided with a tubular body 35 fixed to the lower part of the right traveling control lever 23R extending leftward, Support shaft 36 for supporting body 35
A link 37 fixed to the lower side of the cylindrical body 35 so as to protrude downward, and a front end side pivotally attached to a lower end side of the link 37 by a pivot 38 so as to be rotatable around a left-right axis and a rear end. A link 39 whose side is pivotally attached to the spool S3 of the right-hand traveling control valve B3 so as to be rotatable around a left-right axis.
It is composed of The support shaft 36 is fixed between a pair of left and right support plates 40 fixed on a mounting base 46, and the cylindrical body 35 is fitted on the right side of the support shaft 36 so as to be rotatable around the axis in the left-right direction. I have.

A link mechanism 3 for interlocking the left traveling control lever 23L and the left traveling control valve B5.
Reference numeral 4 denotes an interlocking link 41 fixed to the lower part of the left-side traveling operation lever 23L so as to protrude leftward, a cylinder 42 fixed to the left end side of the interlocking link 41, and a support shaft for supporting the cylinder 42. 36, a link 43 fixed downwardly to the lower side of the cylindrical body 42, and a front end side is pivotally attached to a lower end side of the link 43 by a pivot 44 so as to be rotatable around a left-right axis. An end side is constituted by a link 45 pivotally attached to a spool S5 of the left traveling control valve B5 so as to be rotatable around a left-right axis. The cylindrical body 42 is externally fitted to the left side of the support shaft 36 so as to be rotatable around the axis in the left-right direction.

Therefore, the left-right running operation lever 23
L, 23R are supported so as to be able to swing back and forth around the axis in the left-right direction, and when the operation levers 23L, 23R are tilted forward, the spools S3, S5 are provided via link mechanisms 33, 34.
Is pushed in, the traveling body 4 moves forward and falls backward, whereby the spools S3 and S5 are pulled out via the link mechanisms 33 and 34, and the traveling body 4 moves backward.

A swing arm 48 is fixed to the lower surface of the SP operation pedal 30 so as to project downward.
Is swung right and left around the axis in the front-rear direction via a support shaft 51 which is fixedly supported on a support table 49 fixed to the upper surface side of the revolving base 6 and which is rotatably and internally fitted to and supported by a cylindrical body 50 in the front-rear direction. It is freely supported. The SP operation pedal 30 and the SP control valve B4 are linked to each other by a link mechanism 52. The link mechanism 52 is pivotally attached to the lower end of the swing arm 48 via a ball joint and extends to the left, and is pivotally connected to the left end of the interlock rod 53 via a ball joint. The mounted swing lever 54 and the swing lever 5
A cylindrical body 56 fixed to the lower front portion of the base 4 and fixed to the mounting base 46 so as to protrude upward, and is externally rotatably fitted around a vertical axis. A link 57 fixed to the left projecting shape is pivotally connected to the link 57 so as to be rotatable around a vertical axis, and is rotatable around a vertical axis to a spool S4 of the SP control valve B4. And a link 58 pivotally attached to the link mechanism 52, thereby simplifying the link mechanism 52.

Therefore, when the SP operation pedal 30 is swung to the right, the spool S4 is pulled out via the link mechanism 52, for example, the hydraulic motor of the hydraulic attachment rotates forward, and the SP operation pedal 30 is swung to the left. When you do
When the spool S4 is pushed in, the hydraulic motor of the hydraulic attachment rotates in the reverse direction. The bucket / boom operation lever 25 is supported by a support member 59 of the right operation table 24R via a support mechanism 60 so as to be swingable in the front-rear direction and swingable in the left-right direction.
0 and the spool S2 of the boom control valve B1 spool S1 and the bucket control valve B2 are linked and connected by a boom cable 61 and a bucket cable 62 composed of push-pull cables.

The operation lever 2 for the bucket / boom
5 swings forward, the boom 17 swings upward,
When the bucket boom operation lever 25 is swung to the rear side, the boom 17 swings downward, and when the bucket boom operation lever 25 is swung to the right side, the bucket 1 is moved.
9 is dumped, and the bucket boom operation lever 25 is moved.
Is swung to the left, the bucket 19 performs a scraping operation (squeezing operation).

As shown in FIG. 9, the swing / arm operation lever 28 is swingable in the front-rear direction and the left-right direction on the support member 63 of the left operation table 24L via the support mechanism 64. The support mechanism 64 is connected to the spool S8 of the swing control valve B8 and the spool S6 of the arm control valve B6 by a swing cable 65 and an arm cable 66, each of which is a push-pull cable. .

When the swing / arm operation lever 28 is swung forward, the arm 18 performs a dumping operation (swings forward). When the swing / arm operation lever 28 is swung rearward, the arm 18 is swung. When the swiveling arm 18 swings (swings rearward) and the swing / arm operation lever 28 swings rightward, the swivel table 6 swings rightward, and the swing / arm operation lever 28 swings leftward. When swung, the swivel 6 turns leftward.

As shown in FIGS. 10 to 13, a swing arm 67 is fixed to the lower surface of the swing operation pedal 31 so as to project downward, and the swing arm 67 is fixed to the upper surface of the swivel 6. Front and rear cylinder 69 fixed to the support base 68
The support shaft 70 is pivotally supported around a longitudinal axis through a support shaft 70 which is rotatably fitted inside. The swing operation pedal 31 and the swing control valve B
4 is linked to and linked by a link mechanism 71. The link mechanism 71 is pivotally attached to the lower end of the swing arm 67 via a ball joint and extends rightward, and pivotally connected to the right end of the interlock rod 72 via a ball joint. A swinging lever 73 fixed to a cylindrical body 75 which is attached to the support shaft 74 fixed to the mounting base 46 so as to be rotatable around an axis in the vertical direction; An arm 76 fixed in a protruding manner, and an interlocking rod 77 pivotally attached to the arm 76 via a ball joint and extending rearward.
And a cylindrical body 79 pivotally attached to the rear end side of the interlocking rod 77 via a ball joint and fitted around a shaft 78 fixed to the mounting base 47 so as to be rotatable around a vertical axis. A fixed interlocking lever 80, an arm 81 fixed to the cylindrical body 79 so as to protrude rearward, and a swing control valve B7 pivotally attached to the arm 81 so as to be rotatable around a vertical axis.
And a link 82 pivotally attached to the spool S7 so as to be rotatable around a vertical axis.

Therefore, when the swing operation pedal 31 is swung to the right, the spool S7 is pushed in through the link mechanism 71, the swing bracket 16 swings to the right, and the swing operation pedal 31 is moved to the left. Rocking
The spool S7 is pulled out, and the swing bracket 16 swings leftward. The dozer operating lever 26 has a boss portion 26a at the lower end of the lever 26 rotatably supported by the right operating platform 24 about an axis in the left-right direction and can swing back and forth. The dozer control valve B9 is linked to the dozer control valve B9 via a dozer cable 83 composed of a push-pull cable and a link mechanism 84.

The link mechanism 84 includes a cylindrical member 87 rotatably fitted around a shaft 86 fixed to a support plate 85 fixed to the mount 47 so as to be rotatable around a longitudinal axis. An arm 88 fixed to the lower part so as to protrude downward, and a spool S rotatably attached to the arm so as to be pivotable about a longitudinal axis.
9, a link 89 pivotally attached to the front and rear direction about an axial center, and an arm 90 fixed to the rear portion of the cylindrical body 87 so as to protrude upward. One end of the dozer cable 83 is An arm 91 fixed to the boss portion 26a so as to protrude downward is pivotally connected via a ball joint, and an end side is pivotally connected to the arm 90 of the link mechanism 84 via a ball joint.

When the dozer operating lever 26 is swung forward, the dozer cable 83 and the link mechanism 8 are moved.
4, the spool S9 is pushed in, the dozer 5 is swung downward, and the dozer operation lever 26 is swung rearward, and the spool S9 is pulled out via the dozer cable 83 and the link mechanism 84. The dozer 5 is configured to swing upward.

The left and right operation consoles 24 are supported at their rear portions so as to be rotatable around a left-right axis, so that they can be raised rearward so as not to be in the way when getting on and off. At this time, the operation levers 25 and 28 are locked so as not to move, and the lock lever 27 on the right side is, as shown in FIG.
4 is rotatably supported around a left-right axis and is swingable back and forth.

The boss 27a at the lower end of the lock lever 27
, An arm 93 is fixed, and a front end of a link 94 is pivotally attached to the arm 93 via a pin 95 so as to be rotatable around a left-right axis.
A link 97 rotatably supported on the operation console 24 around a left-right axis via a support shaft 96 is pivotally mounted via a pin 98 so as to be freely rotatable about the left-right axis. A tension spring 100 is interposed between the pin 98 and a pin 99 provided below the support shaft 96.

On the other hand, the boss 27 at the lower end of the lock lever 27
On the lower side of a, there is provided a cylinder 102 rotatably supported on the operation table 24 via a support shaft 101 around a left-right axis. The cylinder 102 has a first lever 103 and a Second
The first lever is formed with a long hole 105 in the longitudinal direction.
Is inserted. The second lever 104 is provided with a pin 106 in the left-right direction.
08, the block body 10
8 is a mount 11 for the operation lever 25 for the bucket boom.
The lower end of a lock rod 110 that is removably inserted into an engagement hole 112 formed in the first lock rod 110 is fixed, and the lock rod 110 is configured to be guided in a longitudinal direction by a guide cylinder 113.

In the above configuration, when the lock lever 27 is in the position shown by the solid line in FIG.
0 is removed from the engagement hole 112, and the link 94 is pulled backward by the urging force of the tension spring 100, and the lock lever 27 is urged in the direction of arrow A. When the lock lever 27 is swung backward from this state and pulled to the position indicated by the imaginary line, the first lever 103 is swung forward by the arm 93 and the second lever 104 is swung upward by the arm 93. The lock rod 110 is pushed upward and inserted into the engagement hole 112, whereby the swing operation of the bucket / boom operation lever 25 becomes impossible.

At this time, the link 94 is moved forward, the biasing direction of the tension spring 100 is switched, and the link 94 is pushed forward so that the lock lever 27 is biased in the direction of arrow B. It is configured. 4 post canopy 9
As shown in FIGS. 3, 4, 5, and 15, the front support 114, the rear support 115, and the connecting member 116 are provided with a pair of left and right posts 117 integrally formed of one pipe material. The post 117 has a mounting plate 118 fixed to the lower end of the front support 114, a front sash 119, and a front upper connection pipe 12.
0A, the connecting pipe 120B at the upper rear and the lower end of the rear support 115 are connected to each other by a fixed mounting base 121.

The mounting plate 118 is fixed to the front end side of the upper surface of the revolving base 6 by bolts, and the mounting table 121 is fixed to the upper surface of the partition 12 by bolts. In addition, left and right connecting material 1
A canopy roof 122 is fixed between the 16 columns, and a U-shaped file 123 is fixed below the left and right rear columns 115. Instead of the four-post canopy 9, a two-post canopy 124, a front filer 125, and a pair of left and right side files 126 are attached as shown in FIG. Mounting stand 1 for 2-post canopy 124
27 is bolted through a bolt insertion hole of the mounting stand 121 of the four-post canopy 9, and a mounting plate 128 of the front wrench 125 is bolted through a bolt insertion hole of the mounting plate 118 of the four-post canopy 9 The mounting plate 129 of the side filer 126 is bolted to the upper surface side of the swivel 6.

[0039]

According to the present invention, a control valve, which is provided with a control valve for controlling various hydraulic devices in a direction orthogonal to the operation direction of the spool, is interlocked to a traveling operation lever via a link mechanism. By dividing the first control valve including the traveling control valve into the first control valve and the second control valve, the first control valve is disposed on the side of the traveling operation lever when the control valve is disposed in the narrow swivel. The operation direction of the spool can be arranged so as to be in the front-rear direction, whereby the traveling operation lever swing direction can be made to coincide with the operation direction of the spool of the traveling control valve. And a link mechanism for interlocking the driving control valve with the traveling control valve.

Further, a turning operation lever for operating a control valve for controlling a turning hydraulic motor of the turning table is provided on the side of the driver's seat, which is operated to swing left and right, and a second control valve is provided. By including the turning control valve and arranging the spool so that the operation direction of the spool is the left-right direction, it is possible to simplify an interlocking mechanism such as a cable that interlocks and connects the turning operation lever and the turning control valve.

[Brief description of the drawings]

FIG. 1 is a plan sectional view of a swivel base.

FIG. 2 is a side view showing an arrangement of a control valve.

FIG. 3 is a side view of the backhoe.

FIG. 4 is a front view of the backhoe.

FIG. 5 is a rear view of the backhoe.

FIG. 6 is a front sectional view showing an interlocking structure between an operation lever and the like and a control valve.

FIG. 7 is a partial side sectional view showing an interlocking structure between an operation lever and the like and a control valve.

FIG. 8 is a plan view showing an interlocking structure between an operation lever and the like and a control valve.

FIG. 9 is a plan view showing an interlocking structure between an operation lever and a control valve.

FIG. 10 is a side view showing an interlocking structure between an operation lever and the like and a control valve.

FIG. 11 is a front view showing an interlocking structure between an operation pedal and a control valve.

FIG. 12 is a plan view showing an interlocking structure between an operation lever and the like and a control valve.

FIG. 13 is a front view showing a part of an interlocking structure between an operation lever and a control valve.

FIG. 14 is a side view showing a lock mechanism of the operation lever.

FIG. 15 is a perspective view of a four-post canopy.

FIG. 16 is an exploded perspective view of a 2-post canopy and a file.

[Explanation of symbols]

 Reference Signs List 3 traveling device 6 turntable 8 driver's seat 23L traveling operation lever 23R traveling operation lever 32 control valve 32A first control valve 32B second control valve 33 link mechanism B3 traveling operation lever B5 traveling operation lever S3 spool S5 spool M1 Hydraulic motor for traveling

Claims (2)

[Claims] 1. A swivel base rotatably supported on a traveling device, and in front of a driver seat provided on the swivel base,
A traveling control lever that is operated to swing back and forth, and is linked to a traveling control valve that controls a traveling hydraulic motor via a link mechanism, and controls various hydraulic devices in the swivel. In a backhoe including a control valve having a valve provided in a direction orthogonal to an operation direction of a spool, the control valve is divided into a first control valve including a traveling control valve and a second control valve, and a first control valve is provided. A backhoe, wherein the valve is arranged on the side of the traveling operation lever and the operation direction of the spool is in the front-rear direction. 2. A turning operation lever for operating a control valve for controlling a turning hydraulic motor of a turning table is provided on a side of a driver's seat, which is operated to swing left and right, and a second control valve is provided. 2. The backhoe according to claim 1, further comprising a turning control valve, wherein the spool is arranged so that an operation direction of the spool is a left-right direction.