JP2010037810A - Loader work device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a loader work device enabling the hydraulic hose of a front loader to be attached and detached in a comfortable position. <P>SOLUTION: Side frames 19 on both right and left sides of the base of the front loader 2 are detachably connected to a main frame 14 vertically attached to both right and left sides of the body 3 of a traveling vehicle 1. Therefore, the front loader 2 can be detachably installed at the front of the body 3 of the traveling vehicle 1. A pressure oil supply passage for supplying pressure oil from a control valve 12 installed the body side 3 of the traveling vehicle 1 to a plurality of hydraulic devices 26, 29 of the front loader 2 includes a plurality of metal pipes 31 and a plurality of hydraulic hoses 33 detachably connected to the metal pipes 31 through connectors 32. At the rear of the main frame 14 through a support tool 34, the ends of the metal pipes 31 on the connector 32 sides are disposed between the body 3 and the main frame 14 through the connectors. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a loader working device in which a working device such as a front loader is detachably attached to a traveling vehicle such as a tractor.

  Conventionally, a front loader is detachably attached to the front part of a tractor body (see, for example, Patent Document 1). In this case, the side frame of the base part of the front loader is detachably connected to the main frame installed upright on both the left and right sides of the front part of the vehicle body of the tractor. The front loader has a pair of left and right side frames, a pair of left and right booms pivoted around the horizontal axis at the upper end of the side frame, and a pivotable about the horizontal axis at the tip of the boom. A boom cylinder, and a boom cylinder is installed between the middle part of the side frame in the vertical direction and the middle lower part of the boom, and a bucket is arranged between the middle upper part of the boom and the bucket. A cylinder is installed.

The boom cylinder and the bucket cylinder are expanded and contracted by a control valve to move the boom up and down and to squeeze and dump the bucket.
The control valve is disposed below the side of the driver's seat and is operated by an operation lever disposed on the side of the driver's seat.
The control valve and the boom cylinder and bucket cylinder of the front loader are connected by a plurality of metal pipes and a plurality of hydraulic hoses which are detachably connected to the metal pipes via connectors. The connecting tool connecting the hydraulic hose and the hydraulic hose is disposed inside the main frame and the side frame.
JP 2008-13993 A

When attaching and detaching the front loader from the tractor, the metal pipe and the hydraulic hose are separated or connected at the position of the connection tool. Conventionally, the installation position of the connection tool is a position hidden inside the main frame and the side frame. It had been. Therefore, when attaching / detaching the front loader when attaching / detaching the front loader, the operator turns both hands from the front and rear sides of the main frame and side frame, that is, separates or connects in a work posture that embraces the main frame and side frame. As a result, the work posture was poor and the burden on the worker increased.
Therefore, an object of the present invention is to provide a loader working device that can attach and detach a hydraulic hose of a front loader in an easy posture.

In order to achieve the above object, the present invention is such that the side frames on both sides in the left-right direction of the base portion of the front loader are detachably connected to the main frames installed upright on both sides in the left-right direction of the vehicle body of the traveling vehicle. A front loader is detachably mounted on the front of the vehicle body,
A pressure oil supply path for supplying pressure oil to a plurality of hydraulic devices of the front loader from a control valve provided on the vehicle body side of the traveling vehicle is detachably connected to the metal pipes and the metal pipes via connectors. The end of the metal pipe on the connection tool side is disposed behind the main frame and between the vehicle body and the main frame via a support tool.

According to this configuration, when attaching / detaching the metal pipe and the hydraulic hose, there is no need to hold the main frame from both the front and rear sides, and the attachment / detachment work can be easily performed only from the rear side of the main frame. The working posture is improved and the burden on the operator can be reduced.
And the said support tool is attached to a vehicle body, The said connection tool is exposed and arrange | positioned at the rear part side of the main frame. According to this configuration, the attaching / detaching operation of the metal pipe and the hydraulic hose can be more easily performed from the rear side of the main frame.
Further, a bonnet is attached to the front part of the vehicle body of the traveling vehicle, and a fuel injection port is provided at the upper rear end of the bonnet, and the main frame is arranged upright in front of the fuel injection port. The connector is arranged corresponding to the fuel inlet in the front-rear direction.

According to this configuration, a work space corresponding to at least the front-rear width of the fuel inlet can be secured on the rear side of the main frame, and workability when the metal pipe and the hydraulic hose are attached and detached from the rear side of the main frame. Can be further improved.
Further, the end of the hydraulic hose on the connection tool side is held by a holding tool that holds a plurality of hydraulic hoses in a vertical arrangement, and the hydraulic hose separated from the metal pipe is attached to the front loader in this holding tool. A locking portion for locking is provided.
According to this configuration, the metal pipe and the hydraulic hose can be arranged in an orderly manner in the space between the bonnet and the main frame. Even when the front loader is separated from the traveling vehicle, the hydraulic hose on the front loader side can be The front loader can be neatly locked.

  ADVANTAGE OF THE INVENTION According to this invention, the loader working apparatus which can attach / detach the hydraulic hose of a front loader with an easy attitude | position can be provided.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 and 2, the loader working device according to the present invention has a front loader 2 attached to the front portion of a tractor (traveling vehicle) 1. The vehicle body 3 of the tractor 1 is configured such that a clutch housing K is connected to the rear part of the engine E, and a transmission case M is connected to the rear part of the clutch housing K via a vehicle body box B. A front axle frame F protrudes, left and right front wheels 5 are suspended on the front axle frame F via a front axle case, and rear axle cases are provided on the left and right sides from the transmission case M, and left and right rear wheels 6 are provided on the rear axle case. Suspended.

On the front axle frame F, a battery, a radiator, other accessory devices, auxiliary machines, and the like are mounted, and these are covered with a bonnet 4.
A mounting frame G is bolted between the rear part of the front axle frame F and the clutch housing K, and a reinforcing frame A is connected to the rear part of the mounting frame G via a connecting frame C. The rear part of the reinforcing frame A is a mission. The vehicle body 3 is reinforced by being connected to the case M. The connection frame C may be connected to the vehicle body box B.
A rear wheel fender 7 that covers the inside and upper part of the rear wheel 6 is provided on each of the left and right sides of the rear part of the vehicle body 3. A driver seat 8 is provided between the pair of left and right rear wheel fenders 7. A control unit 10 including a control handle 9 is provided in the front.

The front wheel 5 is configured to be steered by a steering handle 9 via a power steering device or the like. The rear wheel 6 is configured such that a driving force is transmitted from the engine E via a clutch, a transmission, a propulsion shaft, a rear wheel differential device, and the like. The driving force of the engine E may be transmitted to the front wheels 5 as well.
A floor sheet 11 is provided between the lower ends of the pair of left and right rear wheel fenders 7. The floor seat 11 is extended to below the control unit 10 and the driver's seat 8. A control valve 12 is provided below the driver's seat 8 and on the inner side of one rear wheel fender 7 (right side in the present embodiment). A control lever 13 for operating the control valve 12 is provided on the right side of the driver's seat 8, and the control lever 13 is connected to a spool portion of the control valve 12 through a rod.

  As shown in FIGS. 3 and 4, main frames 14 for mounting the base of the front loader 2 are provided upright on both the left and right sides of the middle part of the vehicle body 3 of the tractor 1. The main frame 14 is integrally formed as a single plate (thick plate) made of cast steel, and is fixed to the left and right outer end portions of the support base 15 that is disposed so as to protrude from the mounting frame G in the left and right direction by welding or the like. And is provided upright. The support base 15 is made of a cylindrical tube material having a horizontal axis. A mounting bracket 16 made of a plate material or the like is fixed to the middle of the support base 15 by welding or the like, and the front end of the outer reinforcing plate D is fixedly attached to the mounting bracket 16 by a fastener such as a bolt. The rear end of the outer reinforcing plate D is connected to the middle part of the reinforcing frame A or the rear axle case.

As shown in FIGS. 3 and 4, a cylindrical boss portion 17 having a left and right pin hole is integrally provided on the upper portion of the main frame 14. A receiving portion 18 having an open arc-shaped receiving recess is provided integrally therewith.
The main frame 14 is attached to both side surfaces of the vehicle body 3 via the support base 15 and the mounting frame G in order to removably connect the side frame 19 of the front loader 2 to the middle part in the longitudinal direction of the vehicle body 3. .
The side frame 19 is provided at the rear end of the boom 20 for detachably connecting the front loader 2 to the vehicle body 3 using the main frame 14. The side frame 19 is mounted so as to sandwich the main frame 14 from both the inside and the outside, and is therefore composed of two plates, which are connected between the two plates 19a (see FIG. 3). ) Are connected by welding or the like.

An engagement pin 21 that engages with the receiving portion 18 of the main frame 14 is integrally fixed to the lower end of the side frame 19, and the main frame 14 is disposed on the rear surface side of the middle portion in the vertical direction of the side frame 19. A cylindrical boss portion 22 having a pin hole corresponding to the boss portion 17 is integrally provided.
Then, in a state where the receiving portion 18 of the main frame 14 is engaged with the engaging pin 21 of the side frame 19, both the boss portions 17 and 22 are made to coincide with each other, and the connecting pin 23 is inserted therethrough, whereby the front loader 2 can be connected to the tractor 1. Further, the front loader 2 can be separated from the tractor 1 by removing the connecting pin 23.

As shown in FIG. 1, the boom 20 of the front loader 2 is formed in a mountain shape that is bent at the center in the longitudinal direction and protrudes upward, and moves upward and downward from the front and rear ends toward the center in the longitudinal direction. The width is gradually increased. And the boom 20 is comprised by the substantially square cylinder shape with the metal plate materials, such as a steel plate, as a whole. In addition, the boom 20 is provided in a pair on the left and right sides, and is disposed on both the left and right sides of the bonnet 4. The pair of booms 20 are connected to each other by a connecting pipe 24 on the front side.
The boom 20 has a base end side (rear end side) pivotally connected to the upper part of the pair of side frames 19 by a pin 25 so as to be rotatable about a left and right axis, and can swing up and down. .

Further, a boom cylinder 26 composed of a double-acting hydraulic cylinder is interposed between the lower surface of the middle part of the boom 20 in the longitudinal direction and the middle part of the left and right side frames 19 in the vertical direction. The boom 20 can swing up and down.
Further, the lower part of the back of the work tool (bucket) 27 is pivotally connected to the tip of the boom 20 by a pin 28 so as to be swingable about a left and right axis. A work tool cylinder (bucket cylinder) 29 composed of a double-acting hydraulic cylinder is interposed between the upper rear surface of the work tool 27 and the upper surface of the middle part in the longitudinal direction of the boom 20. The work tool 27 can swing up and down (squeezing and dumping is possible) by the expansion and contraction operation.

A stand 30 (see FIG. 1) is attached to the lower surface on the front end side of the boom 20. The stand 30 is for supporting the boom 20 in a self-supporting manner with the work tool 9 grounded when the front loader 2 is separated from the tractor 1. The stand 30 can be stored and held on the lower surface on the front end side of the boom 20 when the front loader 2 is connected to the tractor 1.
The telescopic operation of the boom cylinder 26 and the work implement cylinder 29 is performed by operating the control valve 12 provided at the lower part of the driver seat 8 by operating the control lever 13 provided on the right side of the driver seat 8. Is called.

  The control valve 12 and the boom cylinder 26 and the work tool cylinder 29 of the front loader 2 can be attached to and detached from a plurality of (four) metal pipes 31 on the control valve 12 side via a connecting tool 32. It is connected with a hydraulic hose 33 on the connected front loader 2 side. The connection tool 32 connecting the metal pipe 31 and the hydraulic hose 33 is disposed between the bonnet 4 and the inside of the main frame 14 and the side frame 19 on one side (right side) of the tractor 1 in the left-right direction. Has been. The connector 32 is composed of a male side and a female side, and for example, a known hose coupler that can be easily attached and detached by a one-touch method can be employed.

As shown in FIGS. 1, 3, and 5, the end of the metal pipe 31 on the connection tool 32 side is attached to the vehicle body 3 behind the main frame 14 via a support tool 34. The support 34 is composed of a rectangular plate-shaped main part, and a plurality (four) of insertion holes 34a are formed at equal intervals in a single line along the longitudinal direction of the plate-shaped member. In addition, one metal pipe 31 is inserted through each insertion hole 34a. At the upper end of the support 34, a bracket portion 34b for being attached to a part of the side surface of the vehicle body 3 of the tractor 1 is integrally provided.
As shown in FIG. 3, the front end side of the floor seat 11 is bent and inclined obliquely upward, and is extended on the side surface of the vehicle body 3 (side surface of the engine E or clutch housing K) so as to protrude outward in the left-right direction. The upper surface of the member 37 is fixedly supported by a bolt 38. The bracket portion 34 b at the upper end of the support 34 is fixed to the rear surface side of the support member 37 with a bolt 39.

The metal pipe 31 is disposed through the lower side of the floor sheet 11, and the front end side thereof is bent and inclined obliquely upward and is inserted and supported by the support tool 34. Therefore, the support tool 34 is obliquely inclined in the front-rear direction and attached to the support member 37 on the side surface of the vehicle body 3, whereby the insertion hole 34a of the support tool 34 faces the metal pipe 31 in the front-rear direction. Openings are formed so as to be inserted and supported in a single vertical row.
Further, the connection tool 32 is disposed so as to be exposed in a side view on the rear side of the main frame 14. A bonnet 4 is attached to the front portion of the vehicle body 3 of the tractor 1, and a fuel injection port 35 is provided at the upper rear end of the bonnet 4. The main frame 14 is arranged upright on the front side of the fuel injection port 35. In the front-rear direction, the connection tool 32 substantially corresponds to the fuel injection port 35 and is disposed at a position where fuel injection is easy and a position where hose connection is easy.

  Further, the end of the hydraulic hose 33 on the connection tool 32 side is held by a holding tool 36 that holds a plurality (four) of hydraulic hoses 33 in a vertical arrangement. The retainer 36 is a latch that latches the hydraulic hose 33 after being separated from the metal pipe 31 with a hook portion (not shown) provided in a part of the front loader 2, for example, a part of the side frame 19. A portion 36a is provided. The holder 36 is made of a rectangular plate-like member, and in the longitudinal direction of the plate-like member, a plurality of (four) insertion holes 36b through which the hydraulic hoses 33 are inserted one by one are arranged at slight intervals. The hydraulic hoses 33 are formed at equal intervals, and one hydraulic hose 33 is inserted into each insertion hole 36b one by one so that the plurality of hydraulic hoses 33 are arranged and held in a vertical row.

The other end of the hydraulic hose 33 is connected to a hydraulic piping pipe (not shown) disposed along the lower surface of the boom 20 at a midway in the longitudinal direction of the boom 20 (when the boom 20 is swung up and down). Connected with a length that allows for a change in hose length). This hydraulic piping pipe is branched to the left and right at the position of the connecting pipe 24 that connects the left and right booms 20, and is connected to the boom cylinder 26 and the work tool cylinder 29 installed on the left and right booms 20, respectively.
The embodiment of the present invention is configured as described above, and the following operation will be described.
The traveling of the tractor 1 and the operation of the front loader 2 are performed by the driver sitting on the driver's seat 8 and operating the control unit 10 in a predetermined order. When the front loader 2 is separated from the tractor 1, the work tool is first grounded and then the stand 30 is taken out and then the boss portions 17 and 22 are connected to the main frame 14 and the side frame 19. Subsequently, the pin 23 is pulled out, and then the work tool cylinder 29 is contracted to lift the locking pin 21 of the side frame 19 from the receiving portion 18 of the main frame 14, and finally the metal at the position of the connection tool 32. The hydraulic hose 33 is separated from the pipe 31. This completes the separation work. When the front loader 2 is connected to the tractor 1, the tractor 1 is brought close to the front loader 2, and first, the hydraulic hose 33 is connected to the metal pipe 31 at the position of the connection tool 32, and the work tool cylinder 29 is extended. Then, the locking pin 21 of the side frame 19 is engaged by being lowered toward the receiving portion 18 of the main frame 14, and the boss portion 17 of the main frame 14 and the boss portion 22 of the side frame 19 are matched. Then, the connecting pin 23 is inserted. Thereby, the connection of the front loader 2 is completed.

When the front loader 2 is separated or connected to the tractor 1, an operation of attaching / detaching the hydraulic hose 33 to / from the metal pipe 31 at the position of the connector 32 is performed. At that time, according to the configuration of the present invention, it is not necessary to embed and dismount the main frame 14 from both the front and rear sides, and the detachment operation can be easily performed only from the rear side of the main frame 14. This improves the burden on the operator.
The embodiment of the present invention has been described above, but the present invention is not limited to this embodiment, and various modifications can be made. For example, the support 34 may be attached to the main frame 14 side. Moreover, although the case of four hydraulic piping is illustrated, it is provided according to the installation number of the hydraulic equipment installed in the front loader 2.

1 is an overall side view of a loader working device showing an embodiment of the present invention. It is a top view of FIG. FIG. 2 is an enlarged side view of the vicinity of the main frame in FIG. 1. FIG. 3 is an enlarged plan view near the main frame in FIG. 2. It is an enlarged side view of the hydraulic piping system in FIG.

Explanation of symbols

1 Tractor (traveling vehicle)
2 Front loader 3 Car body 4 Bonnet 5 Front wheel 6 Rear wheel 7 Rear wheel fender 8 Driver's seat 9 Control handle 10 Control part 11 Floor seat 12 Control valve 13 Control lever 14 Main frame 15 Support base 16 Mounting bracket 17 Boss part 18 Receiving part 19 Side frame 20 Boom 21 Locking pin 22 Boss portion 23 Connecting pin 24 Connecting pipe 25 Pin 26 Boom cylinder 27 Working tool (bucket)
28 pin 29 Work tool cylinder (bucket cylinder)
30 stand 31 metal pipe 32 connector 33 hydraulic hose 34 support tool 35 fuel injection port 36 holder

Claims (4)

The front loader is attached to and detached from the front of the vehicle body of the traveling vehicle by detachably connecting the side frames on the both sides of the front loader base to the main frame installed upright on both sides of the vehicle body of the traveling vehicle. Equipped with possible
A pressure oil supply path for supplying pressure oil to a plurality of hydraulic devices of the front loader from a control valve provided on the vehicle body side of the traveling vehicle is detachably connected to the metal pipes and the metal pipes via connectors. A plurality of hydraulic hoses to be connected to each other, and an end of the metal pipe on the side of the connector is disposed between the vehicle body and the main frame behind the main frame via a support. Loader working device.   The loader working device according to claim 1, wherein the support tool is attached to a vehicle body, and the connection tool is disposed to be exposed on a rear side of the main frame.   A bonnet is attached to the front part of the vehicle body of the traveling vehicle, a fuel injection port is provided at the upper rear end of the bonnet, and a main frame is arranged upright on the front side of the fuel injection port, The loader working device according to claim 1 or 2, wherein the connection tool is disposed corresponding to the fuel injection port in the front-rear direction.   The end of the hydraulic hose on the connector side is held by a holder that holds a plurality of hydraulic hoses in a vertical arrangement, and this holder holds the hydraulic hose separated from the metal pipe on the front loader. The loader working device according to any one of claims 1 to 3, wherein a locking portion is provided.

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