JPH09233907A - Farm working machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the farm working machine which can be made as small in the right-left direction as possible when not in operation, and can easily engage plural clutch claws on one side with plural clutch claws on the other side and project out right and left working machines sufficiently from the right and left parts of a machine frame when in operation. SOLUTION: Right and left rotational center shafts 22 are positioned behind inside right and left claw clutches 40 and arranged at the right and left parts of the machine frame 1. The right and left claw clutches 40 consist of one clutch claw body 42 which have plural clutch claws 41 and the other clutch claw body 44 having plural clutch claws 43 that engage the clutch claws 41 of the 1st clutch claw body 42 so that they can be disengaged. The clutch claws 43 of the clutch claw body 42 or 43 each have a tapered guide surface 45 formed to guide the clutch claws 43 of the other in the engaging direction at the time of mutual meshing connection.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an agricultural working machine, and more particularly to a working machine for performing soil work such as plowing work and scraping work.

[0002]

2. Description of the Related Art Conventionally, as an agricultural working machine of this type, as described in, for example, Japanese Utility Model Publication No. 7-11528, it is driven by vertical connecting pins on the left and right parts of a machine frame having an output shaft. The left and right working machines, each of which has a shaft and a rotary working body that is rotated by an output from the drive shaft, are rotatably connected in a horizontal direction, and the left and right working machines are located in front of the left and right connecting pins. When projecting to the left and right parts of the machine frame, claw clutches that releasably connect the inner ends of the drive shafts of the left and right working machines are provided at both ends of the output shaft. It is known that the left and right claw clutches are engaged and disengaged by displacing the claw clutch horizontally to the left and right portions of the machine frame and in a state of being folded in parallel behind the machine frame.

[0003]

In the structure described in the above publication, since the left and right connecting pins, which are folding fulcrums of the left and right working machines, are disposed behind the left and right claw clutches, Since the left and right work machines are folded around these left and right connecting pins, the width of the agricultural work machine in the left and right direction is made as small as possible when not in use, causing problems with transportation obstacles during transportation and problems with storage in the hangar. There are certain restrictions in solving the above.

Further, since the left and right connecting pins, which serve as folding fulcrums for the left and right working machines, are disposed behind the left and right claw clutches, when the left and right working machines are extended to the left and right parts of the machine frame. Even if the plurality of fixed side clutch claws and the plurality of movable side clutch claws that mesh with each other are formed in the same shape,
It can be easily engaged and disengaged from each other.

However, when non-working, in order to meet the demand for miniaturizing the lateral width of the agricultural work machine as much as possible, the plurality of fixed clutch pawls and the plurality of movable clutch pawls have the same shape. When the work machines on the left and right are extended to the left and right parts of the machine frame, the multiple clutch pawls on the fixed side and the multiple clutch pawls on the movable side do not match each other in phase and interfere with each other. The left and right working machines cannot be sufficiently projected to the left and right parts of the machine frame in a working state because they cannot engage with each other, and the left and right working machines are projected by the cylinder device like the configuration described in the above publication. In some cases, the clutch pawl may be damaged.

The present invention has been made in view of the above point, and the width of the agricultural work machine in the left-right direction can be reduced as much as possible during non-work, and a plurality of clutch pawls on one side can be used during work. And a plurality of clutch pawls on the other side can be easily engaged with each other to provide an agricultural work machine capable of sufficiently extending the left and right work machines to the left and right parts of the machine frame in a working state. is there.

[0007]

According to a first aspect of the present invention, there is provided an agricultural working machine comprising a machine frame rotatably provided with an output shaft in a left-right direction orthogonal to a traveling direction, and a left-right part of the machine frame in a vertical direction. Left and right work machines having a rotary shaft that is rotatably mounted around a rotary center shaft and that is rotated by the output from the output shaft, and a rotary work body that is rotated by the output from the rotary shaft, and the left and right work machines. When the working machine is horizontally extended to the left and right parts of the machine frame, the inner ends of the rotary shaft are meshedly connected to both ends of the output shaft, and the left and right work machines are folded to the rear of the machine frame. At this time, it is provided with a pawl clutch that releases the meshing connection between the both ends of the output shaft and the inner end of the rotary shaft. The left and right rotation center shafts are located inside and rearward of the left and right claw clutches, and are provided on the left and right portions of the machine frame, respectively. The left and right claw clutches are one clutch claw body having a plurality of clutch claws, and the other clutch claw body having a plurality of clutch claws that are disengageably engaged with the plurality of clutch claws of the one clutch claw body. Consists of.
The one clutch pawl is fixed to either one of the both ends of the output shaft of the machine frame and the inner end of the rotary shaft of the left and right working machines, and the other clutch pawl is provided on the other side. Each of them is mounted so that it can slide only in the axial direction. One of the plurality of clutch pawls of the one clutch pawl body and the plurality of clutch pawls of the other clutch pawl body has a taper shape that guides the other plurality of clutch pawls in a meshing direction when meshing with each other. Each of the guide surfaces is formed.

At the time of work, when the left and right work machines are rotated forward about their respective rotation center axes, the inner ends of the left and right work machines are brought into contact with the left and right parts of the machine frame, respectively. At about the same time, the clutch pawls at the inner ends of the rotary shafts of the left and right work machines are meshed with and connected to the clutch pawls at both ends of the output shaft of the machine frame.

Therefore, the left and right work machines are displaced horizontally to the left and right parts of the machine frame, and the inner ends of the left and right work machines are provided at both ends of the output shaft of the machine frame. Each of them is linked so as to be interlockable via a pawl clutch.

At this time, the left and right working machines are rotated about their respective rotation center axes, so that the tapered guide surfaces of the clutch pawls on one side are brought into contact with the clutch pawls on the other side. While being in contact with each other, the plurality of clutch pawls on the one side are guided in the meshing direction by the plurality of clutch pawls on the other side, so that the inner ends of the left and right working machines are connected to the left and right parts of the machine frame. Almost at the same time, the plurality of clutch pawls on one side are engaged with and connected to the plurality of clutch pawls on the other side, respectively.

When the left and right work machines are rotated rearward about their respective rotation center axes when not working, the inner ends of the left and right work machines are disengaged from the left and right parts of the machine frame. Substantially at the same time, the clutch pawls at the inner ends of the rotary shafts of the left and right working machines are disengaged from the clutch pawls at both ends of the output shaft of the machine frame, and the left and right pawl clutches are separated. Then, by rotating the left and right working machines further rearward, the left and right working machines are folded behind the machine frame in a state of protruding in parallel with each other.

At this time, since the left and right rotation center shafts are located inward and rearward of the left and right claw clutches and provided in the left and right portions of the machine frame, the left and right rotation center shafts are rearwardly arranged. The left and right working machines that are turned toward each other are folded in a state where they are close to each other.

Therefore, at the time of non-working, the left and right claw clutches are disengaged and the left and right working machines are folded in parallel with each other behind the machine frame, and the width of the agricultural working machine in the left-right direction is reduced as much as possible. To be done. Then, the farm work machine is transformed into a form that can solve the problem of traffic obstacle during transportation and the problem of storing in the hangar.

According to a second aspect of the present invention, there is provided the agricultural work machine according to the first aspect, wherein one clutch pawl is fixed to both ends of the output shaft of the machine frame, and the other clutch pawl is provided on the left and right. The inner end of the rotary shaft of the work machine is slidably mounted only in the axial direction, and the other clutch pawl is constantly urged by a spring in the axial direction on the one clutch pawl side. The plurality of clutch pawls of the one clutch pawl body are respectively formed with tapered guide surfaces for guiding the engagement of the plurality of clutch pawls of the other clutch pawl body.

Then, on the other hand, the tapered guide surfaces of the plurality of clutch pawls of one clutch pawl fixed to both ends of the output shaft of the machine frame are pivotally attached to the inner end portions of the rotary shafts of the left and right working machines. When the plurality of clutch pawls of the clutch pawl contact each other, and the left and right work machines are further rotated forward, the tapered guide surfaces of the clutch pawls on one side are provided on the other side. A plurality of clutch pawls on the other side are guided in the meshing direction while a clutch pawl body having a plurality of clutch pawls retracts in the axial direction against the spring.

Further, the plurality of clutch pawls on the other side are disengaged from the tapered guide surfaces of the plurality of clutch pawls on the one side, and the clutch pawl body having the plurality of clutch pawls on the other side is rotated by the restoring force of the spring. The plurality of clutch pawls on the other side of the clutch pawl body are engaged with the plurality of clutch pawls on the one side.

By rotating one clutch pawl on the output shaft while the protruding ends of the clutch pawls on one side are in contact with the protruding ends of the clutch pawls on the other side, The plurality of clutch pawls of the one clutch pawl body are automatically meshed with the plurality of clutch pawls of the other clutch pawl body which are biased by the spring.

According to a third aspect of the present invention, there is provided the agricultural work machine according to the first aspect, wherein the left and right pivot shafts are located at a predetermined inclination angle with respect to an axis vertical to the left and right portions of the machine frame. They are provided so as to be inclined respectively.

When the left and right working machines are folded rearward about the left and right rotation center axes, the left and right working machines are tilted rearward while being close to each other. Folded into.

[0020]

An embodiment of the present invention will be described below with reference to the accompanying drawings.

Reference numeral 1 denotes a machine frame, which is a hollow cylindrical main frame 2 extending in the left-right direction, and integrally projecting from both sides of the main frame 2 toward the front and lower sides, and a lower pin at the tip. Left and right lower arms 4 each having a position 3, a mission 5 provided at an intermediate portion of the main frame 2, and a mast 7 having a connecting portion 6 at an end thereof integrally projected from an upper portion of the mission 5 toward an upper front side. It is configured to have. In addition, the left and right lower pins 3 are integrally and substantially integrally formed on one of the inner and outer sides of the tip of the left and right lower arms 4.

The mission 5 is rotatably supported by a mission case 8 fixed to an intermediate portion of the main frame 2 and a bearing body 9 in the mission case 8, and travels forward from the mission case 8. Direction, a bevel gear 11 fixed to the rear end of the input shaft 10, a bearing body inserted in the mission case 8 and the main frame 2 and in the mission case 8.
12 and an output shaft in the left-right direction which is rotatably supported by bearings 13 at both ends of the main frame 2 and is orthogonal to the input shaft 10.
14 and the output shaft located in the mission case 8
Bevel gear 15 fixed to 14 and meshed with the bevel gear 11
And is configured.

The main frame 2 has a connecting plate 17 integrally fixed to both ends thereof and having guide holes 16 communicating with the inside of the main frame 2. The base end of the lower arm 4 is integrally fixed, and a substantially U-shaped clutch cover 18 is provided on the outer side of the lower arm 4 so as to project outward. A horizontal connecting rod 19 is horizontally fixed to the lower end portions of the left and right lower arms 4, and both end portions of the connecting rod 19 projecting outward from the left and right lower arms 4 are connected to each other. Vertical lock pin 20
Are respectively fixed.

Further, the main frame 2 includes the left and right connecting plates.
Upper and lower shaft support plates 21 that are integrally projecting from the main frame 2 in the rearward and upward direction are located at the inner rear end of the main body 17 and are parallel to each other. Between the support plates 21, vertically rotatable center shafts 22 inclined forward and downward at a predetermined inclination angle with respect to the vertical axis are removably attached. Further, between the upper and lower shaft support plates 21 projectingly provided on the left and right portions of the main frame 2, support arms 23 are integrally projected rearward via the rotation center shaft 22.

Next, left and right work machines 24 are attached to the left and right portions of the machine frame 1 so as to be rotatable about the rotation center shaft 22. The left and right working machines 24 each have a hollow pipe-shaped left and right connecting frame 25,
At the inner end of the connecting frame 25, a contact plate 26 that comes into contact with the outer ends of the left and right clutch covers 18 when the left and right work machines 24 are extended to the left and right parts of the machine frame 1 is integrally formed. The upper and lower transmission cases 27 are integrally fixed to the outer ends thereof.

Further, an inner upper part of a rotary cover 28, which is formed in a substantially arc shape, is integrally connected to and supported by the lower end of the contact plate 26 located below the connecting frame 25. The outer ends of the covers 28 are integrally connected to and supported by the inner parts of the transmission case 27, respectively.
Further, a vertical shaft support plate 29 is integrally projectingly provided on an inner end portion of the rotary cover 28, and a bearing body 30 fixed to a lower end portion of the shaft support plate 29 and an inner lower end portion of the transmission case 27. A rotary working body 32 is rotatably mounted between the bearing body 31 and the bearing body 31 fixed to the rotary working body 32.

The rotary working body 32 has a left and right cultivating shaft 33 rotatably mounted between the bearing bodies 30 and 31 at both ends thereof, and the radiating shaft 33 radially and axially protrudes from the cultivating shaft 33. A plurality of tillage claws 34 are provided, and an outer end portion of the tiller shaft 33 is projected into a lower end portion of the transmission case 27, and a sprocket 35 is fixed to the projecting end portion of the tiller shaft 33.

In the connecting frame 25, bearing bodies 36 at both ends of the connecting frame 25 are coaxial with the output shaft 14 when the left and right working machines 24 are extended to the left and right parts of the machine frame 1. The rotary shafts 37 located on the lines are rotatably supported in the axially immovable state. This left and right rotation axis
The outer ends of 37 are projected into the upper end of the transmission case 27, the sprockets 38 are fixed to the projected ends of the rotary shaft 37, and the endless chain 39 is provided between the sprockets 38 and the sprocket 35. Are each freely suspended.

Next, the left and right working machines 24 are connected to the machine frame 1
The output shaft of the machine frame 1 when horizontally projected to the left and right parts of the
The inner ends of the rotary shafts 37 of the left and right working machines 24 are meshedly connected to both ends of the left and right working machines 24, respectively.
Claw clutches 40 are provided for releasing the meshing connection between the both ends of the output shaft 14 and the inner ends of the rotary shafts 37 of the left and right working machines 24 when folded rearward.

The left and right claw clutches 40 have one clutch claw body 42 having a plurality of clutch claws 41 and a plurality of clutch claws releasably engaged with the plurality of clutch claws 41 of the one clutch claw body 42. And the other clutch pawl 44 having 43.

The one clutch pawl 42 corresponds to the machine frame 1
Of the output shaft projecting into the clutch covers 18 on both sides of the
A plurality of clutch claws of the other clutch claw body 44 are attached to the plurality of clutch claws 41 projectingly provided on the one clutch claw body 42 by spline fitting to both ends of the clutch claw 14.
Tapered guide surfaces 45 for guiding the 43 in the meshing direction are respectively formed.

Therefore, the one clutch pawl 42 is
A spline shaft portion 46 formed at both ends of the output shaft 14 has a tubular portion 48 formed with a large number of splines 47 that are spline-fitted, and an outer end portion of the tubular portion 48 has the plurality of clutch pawls 41. Are annularly arranged at a predetermined interval, the plurality of clutch claws 41 are formed to have a large thickness in the radial direction, and the tapered guide surfaces 45 are formed at the protruding ends thereof.

The other clutch pawl 44 is splined so as to be slidable only in the axial direction on the inner end of the rotary shaft 37 protruding from the inner end of the connecting frame 25 of the left and right working machines 24. The plurality of clutch pawls 43 that are fitted and project from the other clutch pawl body 44 have the one clutch pawl body.
Arc-shaped engaging portions 49 that engage with the tapered guide surfaces 45 of the plurality of clutch claws 41 of 42 in a freely disengageable manner are formed.

Therefore, the other clutch pawl 44 is
A large number of splines spline-fitted to the spline shaft portion 50 formed on the inner end portion of the rotary shaft 37 of the left and right working machines 24.
51 has a tubular portion 52, and the plurality of clutch pawls 43 are annularly arranged at a predetermined interval at the outer end of the tubular portion 52, and the inner corner portions of the plurality of clutch pawls 43 are provided. The arc-shaped engaging portions 49 are respectively formed in the.

Further, a stopper 53 for preventing the other clutch pawl 44 from coming off is integrally fixed to the projecting end portion of the spline shaft portion 50 of the left and right rotary shafts 37. Further, spring receiving plates 54, which are located inward of the other clutch pawl 44 and rotatably pass through the left and right rotating shafts 37, are fixed to the left and right connecting frames 25, respectively.

Further, one end of the left and right spring receiving plates 54 is in contact with one end of a coil spring 55 wound around the outer peripheral portion of the inner end of the left and right rotating shafts 37, and The other end of the spring 55 is in contact with the inner end of the other left and right clutch pawls 44. The left and right coil springs 55 constantly bias the other clutch pawl 44 toward the axial direction on the side of the one clutch pawl 42, and the stopper 53 prevents the clutch pawl 44 from coming off. ing.

Thus, when the left and right work machines 24 are projected to the left and right parts of the machine frame 1, the left and right clutch covers 18 cover the left and right claw clutches 40, respectively. Located on the inner rear side of the left and right claw clutch 40, that is, on the inner rear side of the meshing connection center line between the one clutch claw body 42 and the other clutch claw body 44 of the left and right claw clutch 40. The left and right rotation center shafts 22 are provided on the left and right portions of the machine casing 1, respectively.

Next, attachment frames 56 are integrally provided so as to project inwardly from the rear side of the connection frame 25 of the left and right work machines 24 in the vicinity of the inner ends thereof. The inner ends of the two are rotatably attached to the left and right rotation center shafts 22, respectively. Further, the left and right mounting frames are centered around the left and right rotation center shafts 22.
Via the 56, the left and right working machines 24 are respectively rotated in a state of horizontally projecting to the left and right parts of the machine frame 1 and in a state of being folded in parallel to the upper rear of the machine frame 1. There is.

A connecting frame for the left and right working machines 24
25, lock arms 57 are respectively provided so as to incline toward the front and are integrally projected. The left and right working machines 24 are extended to the left and right parts of the machine frame 1 at the tips of the left and right lock arms 57. Hooks 58, which engage with the left and right lock pins 20 in a disengageable manner, are rotatably attached by vertical support shafts 59, and the left and right hooks 58 are always closed by springs 59a. Being energized with this hook 58
Each has a handle 60 for operating in the opening direction.

Next, mounting frames 61 are integrally provided so as to project rearward in the vicinity of the outer ends of the connecting frames 25 of the left and right working machines 24, respectively. Between the left and right rear ends of the support arms 23 of the machine frame 1, both ends of a work machine support means 63 which is extendable and contractible are vertically rotatably supported by vertical support shafts 62.

Then, the working machine support means 63 makes the left and right working machines 24 parallel to the rear upper part of the machine frame 1 when the left and right working machines 24 are projected to the left and right parts of the machine frame 1. When folded, it expands and contracts, and the left and right working machines 24 are projected to the left and right parts of the machine frame 1 and the left and right working machines 24.
Is supported in a state of being folded in parallel to the upper rear of the machine frame 1.

In the figure, reference numeral 64 is a first ground leveling body supported by the rear ends of the rotary covers 28 of the left and right working machines 24 via a rubber plate 65 so as to be movable up and down, and 66 is a left and right side body. 1
A second ground leveling body, which is rotatably supported in the vertical direction at the lower end of the ground leveling body 64, is provided on the first ground leveling body 64 and the second ground leveling body 66 so as to project rearward and downward. A plurality of foreign matter burial rods.

Next, the operation of the above embodiment will be described.

During operation, the three-point connecting portions of the machine frame 1 (the connecting portion 6 of the mast 7 and the lower pins 3 of the left and right lower arms 4) are connected to the three-point connecting portions of the tractor, and power is transmitted to the PTO shaft of the tractor. The input shaft 10 of the mission 5 is connected via the shaft.

Further, when the left and right work machine support means 63 are respectively extended, the left and right work machine support means 63 rotate the left and right work machines 24 forward around the respective rotation center shafts 22. , The contact plates of the inner ends of the left and right working machines 24
Almost at the same time as 26 is brought into contact with the opening edges of the clutch covers 18 on the left and right sides of the machine frame 1, the other clutch pawls 44 on the inner ends of the rotary shafts 37 of the left and right work machines 24 are attached to the machine frame. One of the output shafts 14 is engaged with one of the clutch claws 42 at both ends of the output shaft 14, and the left and right lock pins 20 of the machine frame 1 are engaged with the hooks 58 of the left and right work machines 24, respectively.

Therefore, the left and right working machines 24 are displaced horizontally to the left and right parts of the machine frame 1, and the left and right working machines 24 are provided at both ends of the output shaft 14 of the machine frame 1. The inner ends of the rotating shafts 37 are linked to each other by the mutual engagement of the clutch pawls 41 and 43 of the pawl clutch 40.

At this time, the left and right work machines 24 are rotated about their respective rotation center shafts 22, so that the plurality of clutch pawls 41 of the one clutch pawl body 42 are connected to the tapered guide surfaces 45 of the other. The arc-shaped engaging portions 49 of the plurality of clutch pawls 43 of the clutch pawl body 44 are brought into contact with each other, and the left and right work machines 24 are further rotated forward, whereby the plurality of clutch pawls 41 on one side are formed. While the clutch pawl 44 having the plurality of clutch pawls 43 on the other side of the tapered guide surface 45 retreats in the axial direction against the coil spring 55, the plurality of clutch pawls 43 on the other side move in the meshing direction. Be guided.

The plurality of clutch claws 43 on the other side are disengaged from the tapered guide surfaces 45 of the plurality of clutch claws 41 on the one side, and the clutch claw body 44 having the plurality of clutch claws 43 on the other side is coiled. The return force of the spring 55 pushes the clutch claws 43 in the axial direction, and the plurality of clutch claws 43 of the clutch claw body 44 mesh with the plurality of clutch claws 41 on one side.

One clutch pawl 42 is rotated by the output shaft 14 with the protruding ends of the clutch pawls 41 on one side abutting the protruding ends of the clutch pawls 43 on the other side. As a result, the plurality of clutch claws 41 of the other clutch claw body 44, which is biased by the coil spring 55, automatically meshes with the plurality of clutch claws 41 of the one clutch claw body 42.

Therefore, when the inner ends of the left and right work machines 24 are brought into contact with the left and right parts of the machine frame 1, respectively, substantially at the same time, the plurality of clutch claws 41 of the one clutch claw body 42 are connected to the other clutch claw body 44. The plurality of clutch claws 43 are meshed with each other and connected. Then, the left and right work machines 24 are supported by the respective work machine support means 63 in a work state in which they are horizontally projected to the left and right parts of the machine frame 1. Further, the left and right claw clutches 40, which connect both ends of the output shaft 14 of the machine frame 1 and the inner ends of the rotary shafts 37 of the left and right work machines 24, with the clutch covers 18 provided on the left and right parts of the machine frame 1. The safety when the left and right claw clutch 40 is rotated is secured as compared with the case in which the left and right claw clutch 40 is covered.

When the agricultural work machine is pulled by the tractor and the output from the PTO shaft of the tractor is transmitted to the input shaft 10 of the mission 5 via the power transmission shaft, the bevel gear is transmitted by the input shaft 10. Output shaft via 11 and 15
14 is rotated, the rotary shafts 37 of the left and right work machines 24 connected to both ends of the output shaft 14 via the left and right claw clutches 40 are rotated, and the left and right rotary shafts 37 in the left and right transmission cases 27 are rotated. The rotary work bodies 32 of the left and right work machines 24 are rotatably driven via the interlocking media (sprocket 35, 38 and endless chain 39), and the soil in the field is removed by the respective plowing claws 34 of the left and right rotary work bodies 32. It is cultivated one after another.

Next, at the time of non-working, the hooks 58 of the left and right work implements 24 are respectively removed from the left and right lock pins 20 of the machine frame 1, and the left and right work implement support means 63 are contracted to support the left and right work implements. When the left and right work machines 24 are rotated rearward and upward by the means 63 about the respective rotation center shafts 22, and the inner ends of the left and right work machines 24 are separated from the left and right parts of the machine frame 1, respectively. Substantially at the same time, the other clutch pawl 44 at the inner end of the rotary shaft 37 of the left and right working machines 24 is the output shaft of the machine frame 1.
The left and right claw clutches 40 are disengaged from the clutch claw bodies 42 on both ends of the clutch 14, respectively. Then, the left and right working machines 24 are further rotated rearward and upward, whereby the left and right working machines 24 are folded in parallel to the rear upper side of the machine frame 1.

At this time, the left and right rotation center shafts 22 are positioned inward and rearward of the left and right claw clutches 40 and are directed forward and downward at a predetermined inclination angle with respect to the axis of the left and right portions of the machine frame 1 in the vertical direction. Since the left and right working machines 24 are folded upward and rearward about the left and right pivoting center shafts 22, the left and right working machines 24 are placed between each other. It is folded in a state that it is tilted upward and backward while making it close.

Therefore, when not in operation, the left and right claw clutches 40 are disengaged and the left and right working machines 24 are folded in parallel to the rear upper part of the machine frame 1 so that the width of the agricultural working machine in the left-right direction can be maximized. Be miniaturized. Then, the farm work machine is transformed into a small form that can solve the problems of traffic obstacles during transportation and the problems of storing in the hangar.

Next, in the above-described embodiment, one clutch pawl 42 of the left and right pawl clutches 40 is the output shaft of the machine frame 1.
It is fixed to both ends of 14 respectively, and one of these clutch pawls
The case has been described in which the plurality of clutch claws 41 of 42 are provided with the tapered guide surfaces 45 for guiding the plurality of clutch claws 43 of the other clutch claw body 44 in the meshing direction.

Not limited to this, one clutch pawl 42 is axially slidably attached to the inner ends of the rotary shafts 37 of the left and right working machines 24, respectively. A coil spring 55 constantly urges the clutch pawls 41 of the one clutch pawl body 42 in the axial direction, and guides the plurality of clutch pawls 43 of the other clutch pawl body 44 in the meshing direction. The guide surface 45 is formed and the other clutch pawl is formed.
The 44 may be fixed to both ends of the output shaft 14 of the machine casing 1, respectively.

With this structure, as in the case of the above-described embodiment, the left and right rotation center shafts 22 provided on the left and right parts of the machine frame 1 are positioned inside and behind the left and right claw clutches 40.
When the left and right work machines 24 are rotated in the front-rear direction about, the clutch claws 41 and 43 of the left and right claw clutches 40 are smoothly and disengageably engaged with each other. Then, the left and right working machines 24 are respectively horizontally extended to the left and right parts of the machine frame 1, and the left and right working machines 24 are respectively in a non-working state in which the left and right working machines 24 are folded in parallel to the upper rear part of the machine frame 1 and slightly deformed. Easily displaced.

[0058]

According to the first aspect of the present invention, the left and right rotation center shafts are provided on the left and right portions of the machine frame so as to be located inside and rearward of the claw clutches on the left and right portions of the machine frame. Since the left and right working machines are rotatably provided around the center axis, the left and right working machines are folded toward the rear of the machine frame, and the horizontal width of the agricultural working machine is as small as possible when not in use. In addition, there is no risk of traffic obstruction during transportation, and it can be easily taken in and out of the hangar.

Further, the rotation center shafts of the left and right working machines are provided on the inner and rear sides of the left and right claw clutches of the machine frame, and the plurality of clutch claws of one clutch claw body and the other are provided. One of the plurality of clutch pawls of the clutch pawl is formed with a tapered guide surface for guiding the other clutch pawls in the engaging direction at the time of meshing engagement with each other. It is possible to easily engage a plurality of clutch claws on one side with a plurality of clutch claws on the other side on the surface, and to extend the left and right work machines to the left and right parts of the machine frame sufficiently in the working state. You can

According to the second aspect of the present invention, when one clutch pawl engages with the other clutch pawl, the other clutch is engaged by the tapered guide surfaces of the plurality of clutch pawls of the one clutch pawl. The plurality of clutch pawls can be smoothly meshed with the plurality of clutch pawls of one clutch pawl body while the pawl body moves back and forth in the axial direction against the spring.
It is possible to prevent the situation in which the left and right working machines do not horizontally project to the left and right parts of the machine frame due to the mutual interference of the plurality of clutch claws on both sides. It is possible to prevent the clutch claws from being broken when it is carried out by the like.

According to the third aspect of the present invention, the left and right working machines can be folded toward the upper rear of the machine frame, and the weight balance is greater than that in the case where the left and right working machines are folded horizontally behind the machine frame. The stability during transportation such as road driving can be secured well.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a folding mechanism portion of an agricultural working machine showing an embodiment of the present invention.

FIG. 2 is an explanatory plan view of the same agricultural working machine.

FIG. 3 is a side view of the same agricultural working machine.

FIG. 4 is a cross-sectional view showing a drive system of a rotary working body of the same working machine.

FIG. 5 is a sectional view showing a state in which the upper claw clutch is in the middle of engagement.

FIG. 6 is a sectional view showing a meshed state of the upper claw clutch.

FIG. 7 is an explanatory diagram showing a meshing state of a plurality of fixed and movable clutch pawls.

[Explanation of symbols]

 1 Machine frame 14 Output shaft 22 Rotation center shaft 24 Working machine 32 Rotary work body 37 Rotating shaft 40 Claw clutch 41 Clutch claw 42 One clutch claw body 43 Clutch claw 44 The other clutch claw body 45 Guide surface 55 Spring

Claims (3)

[Claims] 1. A machine frame in which a left and right output shaft orthogonal to a traveling direction is rotatably provided, and is attached to left and right parts of the machine frame so as to be rotatable about a vertical rotation center axis. Left and right work machines having a rotary shaft rotated by the output from the output shaft and a rotary work body rotated by the output from the rotary shaft, and the left and right work machines horizontally on the left and right parts of the machine frame. When projecting, the inner ends of the rotary shaft are meshedly connected to both ends of the output shaft, respectively, and both ends of the output shaft and the rotary shaft are folded when the left and right working machines are folded behind the machine frame. A left and right rotation center shafts located inside and rearward of the left and right claw clutches, respectively, and provided in left and right portions of the machine frame, respectively. The claw clutch has multiple clutch claws One clutch pawl body and the other clutch pawl body having a plurality of clutch pawls that are disengageably engaged with the plurality of clutch pawls of the one clutch pawl body, and the one clutch pawl body is It is fixed to either one of the both ends of the output shaft of the machine frame and the inner end of the rotary shaft of the left and right work machines, and the other clutch pawl can be slid only in the axial direction on the other side. One of the plurality of clutch pawls of the one clutch pawl and the plurality of clutch pawls of the other clutch pawl is axially mounted, and guides the other plurality of clutch pawls in the engagement direction when they are engaged with each other. The agricultural working machine is characterized in that each of the tapered guide surfaces is formed. 2. One clutch pawl is fixed to both ends of an output shaft of the machine frame, and the other clutch pawl is slid only in an axial direction on an inner end of a rotary shaft of the left and right working machines. The other clutch pawl is always urged by a spring in the axial direction toward the one clutch pawl, and the other clutch pawl of the one clutch pawl is the other one. The agricultural work machine according to claim 1, wherein each of the clutch claw bodies is formed with a tapered guide surface for guiding the engagement of the plurality of clutch claws. 3. The right and left rotation center shafts are respectively provided on the left and right parts of the machine frame so as to be inclined forward and downward at a predetermined inclination angle with respect to a vertical axis line. Farm work machine.