JP2004147636A - Agricultural work vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an agricultural work vehicle enabling easy adjustment of the attaching angle of a tractor-attaching mast of the work vehicle body to meet a tractor having a forwardly inclined rear hitch to attach the work vehicle. <P>SOLUTION: The agricultural work vehicle is attached to the rear hitch of a tractor and suspended by a stand. The attaching part of the stand has an attach angle-adjusting mechanism to enable the change of the posture of the agricultural work vehicle. The attach angle of a tractor-attaching mast of the vehicle is changed by the angle-adjusting mechanism to enable the attaching and detaching of the vehicle to a tractor having a forwardly inclined attaching angle of the rear hitch of the tractor. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an improvement in a stand of a working machine mounted on a tractor.
[0002]
[Prior art]
As a structure of a stand according to the prior art, Japanese Utility Model Publication No. 6-895 is known, and according to this publication, a pair of left and right stands is composed of a horizontal rod portion that is long in the front-rear direction and a rising rod portion. The upper part of the unit is configured to be inserted into a cylindrical holder having an insertion hole provided on the working machine side and having a vertically penetrating hole, and detachable with a connecting pin.
[0003]
[Problems to be solved by the invention]
At present, there are various tractors on the market, and in some tractors, a mounting angle of a mounting hitch provided at a rear portion of the tractor that connects the agricultural work machine and the tractor is inclined forward. In a stand configuration for suspending an agricultural work machine according to the prior art with respect to a tractor having such a mounting hitch, it is not possible to change the mounting angle in order to suspend the tractor mounting mast provided on the agricultural work machine body at a fixed mounting angle. It is impossible, and the mounting angle with the rear hitch of the tractor does not match, so that the tractor cannot be mounted on the tractor.
In addition, in order to match the mounting angle of the tractor mounting mast provided on the agricultural working machine with the mounting angle of the mounting hitch provided on the rear of the tractor, there is a method of preparing various types in which the angle of the rising rod portion of the stand is different, but the type of stand is different. It is not preferable from the viewpoint of increased parts management.
Therefore, the present invention provides an agricultural work machine capable of easily adjusting a mounting angle of a tractor mounting mast provided on the agricultural work machine so as to be able to cope with a tractor in which a tractor rear hitch for mounting the agricultural work machine is inclined forward. It is.
[0004]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, a farm working machine attached to a rear hitch of a tractor includes a stand for suspending the farm working machine, and a mounting angle adjusting mechanism that allows a posture of the farm working machine to be changeable at a mounting portion of the stand. It is intended to provide an agricultural work machine characterized by being provided.
[0005]
[Action]
With the above configuration, the mounting angle of the tractor mounting mast provided on the farm working machine is changed by the mounting angle adjustment mechanism, and the farm working machine that can be attached and detached even on a tractor where the mounting angle of the tractor rear hitch is inclined forward. The purpose is to provide.
[0006]
【Example】
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a plan view of a folding alternative scraping device embodying the present invention, and FIG. 2 is a rear view of the folding alternative scraping device. FIG. 3 is a side view of the scraping device, and FIG. 4 is a drive transmission diagram of the scraping device. FIG. 5 is an enlarged view of a clutch unit of the scraping device, and FIG. 6 is a perspective view of a clutch provided in the scraping device. FIG. 7 is a side cross-sectional view of the same scraping device, and FIG. 8 is a view showing a folding and rotating action of left and right extension working bodies provided in the same scraping device. FIG. 9 is an enlarged view showing a connecting portion of an extension working body provided in the same scraping device, and FIG. 10 is an enlarged view showing a connecting portion when the extension working body provided in the same scraping device is folded and rotation starts. 11 is a side view of the same scraping device when folded and stored, FIG. 12 is an enlarged action diagram showing the leveler connection of the same scraping device, and FIG. 13 is an enlarged view showing the leveler connecting portion of the same scraping device. 14 is a side cross-sectional view of a stand mounting portion of the same shaving device, FIG. 15 is a side cross-sectional view of a stand mounting portion of the shaving device according to the second embodiment, and FIG. 16 is a stand of the shaving device according to the third embodiment. It is side surface sectional drawing of a mounting part.
[0007]
In FIGS. 1, 2 and 3, A denotes a folding scraper which is an agricultural work machine, which is constituted by three divisions of one central work body and extension work bodies 2L and 2R extending the working width to the left and right. The central working body 1 has a center frame 11 extending left and right. A transmission case 12 is provided in front of the center of the center frame 11 so as to be sandwiched. Lower brackets 13L and 13R are provided. A top bracket 13T is provided on the upper part of the transmission case 12, and the tractor mounting mast 13 is constituted by the lower brackets 13L and 13R. An input shaft 12a protrudes forward, and the tractor mounting mast 13 is connected to a mounting hitch (not shown) provided in the tractor three-point link mechanism. A universal joint or the like is connected so as to transmit the drive from the PTO shaft.
[0008]
In the lower part of the transmission case 12, there are rotatably driven central crushing rotaries 14L and 14R extending horizontally in the left and right direction and rotatably supported at both ends. Then, a center cover 15 covering the upper portions of the center crushing rotaries 14L and 14R is fixed to side plates 11L and 11R provided at both ends at a lower portion of the center frame 11, and both ends are pivotally supported behind the center cover 15. A first center leveler 16 which is rotatable up and down, and a second center leveler 17 which is rotatably supported up and down at the rear of the first center leveler 16 at both ends thereof are provided.
[0009]
The extension working bodies 2L, 2R are provided with side crushing rotaries 22L, 22R rotatably supported at both ends below the side cover frames 21L, 21R in which the frame and the cover are integrated, and the side cover frames 21L, 2R are provided. Behind 21R, first side levelers 23L, 23R are pivotally supported at both ends and vertically rotatable, and second sides are vertically supported and rotatable at both ends behind the first side levelers 23L, 23R. The side levelers 24L and 24R form and are provided with side levelers.
[0010]
The connecting portion between the central working body 1 and the extended working bodies 2L, 2R is provided with rotating brackets 11a, 11a provided at both ends of the center frame 11 and side faces provided in a U-shape on the side cover frames 21L, 21R. The rotating brackets 25L, 25R are overlapped with each other, and the rotating shafts 2a, 2a are inserted and supported by the shafts. The extended working bodies 2L, 2R are brought into the expanded state during the extension work and the folded state during the movement storage during the non-work. It is pivotally connected.
[0011]
Reference numeral 3 denotes a leveler operating means for switching the second center leveler 17 and the second side levelers 24L and 24R between a soil collecting work position where the mud is scraped and a scraping work position where the mud is leveled evenly. Extension work lock devices for fixing the work bodies 2L, 2R in the unfolded state during the extension work, and are arranged at the front side connection portions of the central work body 1 and the extension work bodies 2L, 2R, respectively.
Reference numeral 5 denotes a fold lock device for fixing the extension working bodies 2L and 2R in a folded state when moving and storing when not working, and is disposed at both rear end portions of the central working body 1, respectively.
[0012]
Reference numeral 6 denotes a clutch, which is disposed at an outer end of the central crushing rotary 14L, 14R and an inner end of the side crushing rotary 22L, 22R, and is driven and transmitted.
Reference numeral 7 denotes a leveler connecting device which connects the second center leveler 17 and the second side levelers 24L and 24R at the time of extension work, and is disposed at both ends of the second center leveler 17, respectively.
Reference numeral 8 denotes a leveler fixing device, which is provided substantially at the inner end of the extension working bodies 2L and 2R, and is the first side leveler when the extension working bodies 2L and 2R are in a folded state when moving and stored when not working. 23L and 23R, and the second side levelers 24L and 24R are fixed for fluttering.
[0013]
In FIG. 4, the drive transmission will be described. Although not shown, the driving force is transmitted to an input shaft 12a connected to a tractor PTO shaft via a universal joint or the like, and is reduced by bevel gears 12b and 12c provided in the transmission case 12. A drive shaft 12d is provided in the horizontal direction by the bevel gear 12c, a sprocket 12e is provided substantially in the center, a chain 12g is laid on a sprocket 12f provided below the sprocket 12e, and the lower end of the transmission case 12 is further reduced in speed. The drive is transmitted to the output shaft 12h projecting left and right. The center crushing rotaries 14L and 14R are attached to both ends of the output shaft 12h and are driven to rotate.
[0014]
The center crushing rotaries 14L and 14R are configured such that the crushing claw 14b can be detachably attached to a plurality of helically provided claw holders 14c on the circumference of the rotor shafts 14a and 14a, and the outer end is a bearing retainer 14d. , 14d, and can be driven to rotate to break mud.
[0015]
The side crushing rotaries 22L and 22R are configured to be detachable, having crushing crushing claws 14b on claw holders 14c provided in a plurality of rows spirally on the circumference of the rotor shafts 22La and 22Ra. The inner end 22R is supported by the bearing retainer 14d, and the outer end is supported and rotatable by a bearing retainer 22a provided inside the side plates 21La and 21Ra constituting the side cover frames 21L and 21R. A pair of clutches 6 and 6 are provided at the outer end of the central crushing rotary 14 and the inner end of the lateral crushing rotary 22L and 22R, respectively. 22L and 22R.
[0016]
FIGS. 5 and 6 show drive transmission to the extension work body 2L, and the clutch 6 is provided at the outer end of the central crushing rotary 14L, 14R and the inner end of the side crushing rotary 22L, 22R, respectively. The extension work body 2L will be described because it is symmetrical and has the same configuration.
[0017]
The clutch 6 further includes a center clutch rotor shaft 61a further protrudingly provided by a bearing retainer 14d provided at an outer end of the rotor shaft 14a, and a bearing retainer 14d provided at an inner end of the rotor shaft 22La. It is provided between the protruding side clutch rotor shaft 61b. Further, the clutch 6 has a disk-like shape having a horizontal end surface at the outer end of the center clutch rotor shaft 61a, and an engagement member 62 having an engagement piece 62a on the outer peripheral portion directed toward the extension work body 2L. The side clutch rotor shaft 61b has a disk having an end face facing the engagement body 62 at an inner end thereof and an engagement piece 63a facing the center work body 1 at an outer peripheral portion. An engagement body 63 is provided and configured. The engaging piece 62a and the engaged piece 63a have an abutting surface on the rotation direction side, and while the central soil breaking rotary 14L is driven to rotate, the engaging piece 62a is brought into contact with the engaged piece 63a. The rotation driving force is transmitted to the side crushing rotary 22L.
[0018]
The engaging member 62 is fixed by bolts 14e together with the crushing claws 14b detachably attached to a claw holder 61c provided on the center clutch rotor shaft 61a, and the engaged member 63 is a claw provided on the side clutch rotor shaft 61b. The holder 61c is fixed by bolts 14e together with the earth removal claws 14b which are detachably attached.
[0019]
In FIG. 7, reference numeral 3 denotes a leveler operating means, which includes an operating lever 31 and a lock bracket 32 pivotally supported at a substantially rear portion of the center frame 11 so as to be freely rotatable in the front-rear direction. A connection plate 33 that connects the brackets 32 is provided. The first leveler support arm 34 is provided with a start end behind the center frame 11 above the shaft support of the lock bracket 32 and is supported to be vertically rotatable rearward. Both ends of a second leveler support arm 35 provided toward the upper surface of a substantially central portion of the second center leveler 17 from the end portion are pivotally supported and rotatably connected to form a link body.
[0020]
The first leveler support arm 34 has a lock plate 34a having a U-shaped notch 11c, and the lock bracket 32 is engaged with the U-shaped notch of the lock plate 34a. When the operation lever 31 is rotated back and forth, the lock bracket 32 connected by the connection plate 33 is rotated in the front-rear direction and provided on the lock bracket 32. The lock pin 32a and the lock plate 34a having a U-shaped notch provided in the first leveler support arm 34 are disengaged, and the first center leveler 16 and the second center leveler 17 are fixed and held to scrape mud. It becomes possible to switch to the soiling work position b to be approached and to the shaving work position a where the fixing is released and the mud is leveled evenly.
[0021]
FIG. 8 is a view showing the turning operation of the extension working bodies 2L, 2R of the folding and scraping apparatus A, and the opening is formed in the turning brackets 11a, 11a provided at both rear end portions of the center frame 11 provided in the central working body 1. The rotation of the center of the rotated hole and the U-shaped side rotation brackets 25L, 25R provided at the rear inner ends of the side cover frames 21L, 21R provided on the extension working bodies 2L, 2R. The rotating shafts 2a, 2a are inserted so as to be aligned with the center of the hole, and are pivotally supported so as to be rotatable.
[0022]
The extension working body 2R is in the middle of rotation, and the extension working body 2L is rotated about the rotation shaft 2a in the folding direction at the time of moving and storage, and is fixed and held by the folding lock device 5. . The extension working bodies 2L and 2R are assisted by a gas spring G, which is a compression elastic body, to rotate when folded.
[0023]
In FIG. 9, the extension work lock device 4 for fixing the extension work bodies 2L and 2R in the unfolded state at the time of extension work and the extension work bodies 2L and 2R are rotated upward to fix the extension work bodies 2L and 2R in the folded state at the time of moving and storing. The fold lock device 5 will be described. However, since it is symmetrical and has the same configuration, only one extension work body 2L will be described. Reference numeral 4 denotes an extension work lock device, which is provided with an engagement plate 41 having a U-shaped notch disposed at both front ends of the center frame 11, and an engagement hook 42 is horizontally provided below the engagement plate 41. And is always elastically held in the locking direction.
[0024]
An engagement pin 43a which engages with a U-shaped notch provided in the engagement plate 41 and is engaged by the engagement hook 42 is provided at an inner front portion of the side cover frame 21L. A coupling bracket 43 is provided to fix the extended work body 2L in the deployed state during the extension work, and to release the lock, grasp the lever 42a provided on the engagement hook 42 as shown in FIG. The lock can be released by moving it.
[0025]
Reference numeral 5 denotes a folding lock device, which is provided with a folding engagement hook 51 which is rotatably supported in the horizontal direction by the rotating bracket 11a and has a hook-shaped notch. It is held elastically.
[0026]
A folding engagement pin 52 is provided on the side rotation bracket 25L. When the extension work body 2L is folded and rotated, the folding engagement pin 53 is provided in an engagement groove 53 provided on the rotation bracket 11a. The mating pin 52 engages and is engaged by the folding engagement hook 51, so that the extension working body 2L can be fixed in the folded state at the time of moving and storing. As shown in FIG. 10, the lock can be released by grasping the lever 51a provided on the folding engagement hook 51 and rotating the lever 51a in the release direction.
[0027]
FIG. 11 is a side view showing a state in which the extension working bodies 2L and 2R are folded, and a stand S is detachably mounted on a stand bracket 11b provided at a front portion of a center frame 11 provided in the central working body 1. FIG. 14 is a side sectional view of the stand mounting portion.
[0028]
The stand bracket 11b is formed in a U-shape that opens forward. A plurality of U-shaped notches 11c are provided in the upper part, and the through-hole 11d is formed straight below the notches 11c. The same number as the notches 11c is provided. In this embodiment, the notch 11c and the through hole 11d are provided at two locations. An engaging pin S1 is provided at an upper portion of a mounting portion of the stand S, that is, a rising rod portion, and a mounting hole S2 is provided linearly below the engaging pin S1. The engaging pin S1 is engaged with the cutout portion 11c. Then, the center of the through hole 11d and the center of the mounting hole S2 are aligned, and the mounting pin S3 is inserted to be detachable.
[0029]
Further, by providing the angle of the center line connecting the notch portion 11c provided in the stand bracket 11b and the center point of the through hole 11d at a phase of α °, the mounting position of the stand S is changed to change the position of the substitute device A. And the mounting angle of the tractor mounting mast 13 formed by the lower brackets 13L and 13R and the top bracket 13T can be changed. With this configuration, it is possible to mount even a tractor in which the rear hitch T of the tractor is inclined forward. In this embodiment, the notch 11c and the through-hole 11d are provided at two places, respectively, so that the mounting angle can be adjusted in two stages so that the tractor can be mounted regardless of the type.
[0030]
Referring to FIG. 15, a second embodiment of the stand mounting portion will be described.
A stand S is detachably mounted on a stand bracket 11b provided at a front portion of the center frame 11 provided in the central working body 1, and can be detached from the tractor and stored in a folded state and an expanded state, though not shown. . A plurality of U-shaped cutouts 11c are provided at the upper portion of the stand bracket 11b, and a plurality of U-shaped cutouts 11c are formed from the center of the cutouts 11c downward in the same radius. There are two places.
[0031]
The angle of the center line connecting the center point of the through hole 11d and the center point of the notch 11c is provided at a phase of β °, so that the mounting position of the stand S is changed to change the posture of the substitute device A. And the mounting angle of the tractor mounting mast 13 formed by the lower brackets 13L and 13R and the top bracket 13T can be changed. With this configuration, it is possible to mount even a tractor in which the rear hitch T of the tractor is inclined forward. In this embodiment, since the notch portions 11c are provided at three places, the angle of the hitch point can be adjusted in three stages, so that the tractor can be mounted regardless of the type.
[0032]
Referring to FIG. 16, a third embodiment of the stand mounting portion will be described.
A stand S is detachably mounted on a stand bracket 11b provided at a front portion of the center frame 11 provided in the central working body 1, and can be detached from the tractor and stored in a folded state and an expanded state, though not shown. . The stand bracket 11b is formed in a U-shape that opens forward. A U-shaped notch 11c is provided at the upper portion, and a through hole 11d is provided below the notch 11c in a straight line. The center frame 11 is provided rotatably in the front-rear direction.
[0033]
Then, a handle H having a screw shaft is bridged above the rotating portion between the stand bracket 11b and the center frame 11, and the stand bracket 11b is rotated in the front-rear direction by being rotated forward and backward, and The posture of the substitute device A can be changed. With this configuration, the mounting angle of the tractor mounting mast 13 formed by the lower brackets 13L and 13R and the top bracket 13T can be set in a stepless manner between γ °, and the rear hitch T of the tractor can be set. It is also possible to mount the tractor that leans forward.
[0034]
FIGS. 12 and 13 illustrate the leveler connecting operation. The leveler connecting device 7 provided at both outer ends of the second center leveler 17 and inner ends of the second side levelers 24L and 24R is symmetrical. Since it has the same configuration, only one extension work body 2L will be described.
[0035]
The leveler connecting device 7 is provided at the end of the second center leveler 17 with a leveling auxiliary plate 71 protruding toward the extension work body 2L and a connecting piece 72 provided on the upper part of the leveling auxiliary plate 71. At the inner end, an extended terrain assisting plate 73 protruding toward the central work body 1 so as to overlap with the terrain assisting plate 71, and the upper surface of the connecting piece 72 is held above the extended terrain assisting plate 73. A lock plate 74 fixed and held is rotatably supported in a vertical direction.
[0036]
The lock plate 74 is pivotally supported by a fulcrum pin 75, is rotatable in the vertical direction, and is always elastically held in the opening direction by a spring 76 to form an opening. Then, the extension work body 2L is deployed and rotated during extension work, and as shown in FIG. 12, the extension terrain assisting plate 73 is formed on the lock plate 74 while overlapping with the upper surface of the terrain assisting plate 71. The opening that contacts the tip of the connecting piece 72. When the rotation is further advanced, as shown in FIG. 13, the distal end of the connection piece 72 pushes the contact portion 74a of the lock plate 74, the lock plate 74 rotates downward, and the holding surface 74b is connected to the connection surface 74b. The upper surface of the piece 72 is held and fixed and held, and the second center leveler 17 and the second side leveler 24L are connected. By being connected in this manner, the second side levelers 24L, 24R can be displaced to a substitute leveling machine for leveling the soil in conjunction with the second side leveler 17, and a soil collecting work position for scraping the soil. .
[0037]
9 and 3, a description will be given of the leveler fixing means in a case where the extension working bodies 2L and 2R are turned upward to be in a folded state at the time of moving and storing when not working. Therefore, one extension work body 2L side will be described. Reference numeral 8 denotes a leveler fixing device, and a first lock arm 82 that pivotally supports a start end of a fulcrum pin 81 projecting from the inner side plate 21La of the side cover frame 21L outward in the horizontal direction so as to be rotatable rearward. A second lock arm 83 is provided from the end of the first lock arm 82 toward the upper surface of the second side leveler 24L, and both ends are pivotally supported to form a link body. Further, a leveler lock bracket 86, which is rotatably supported by a fulcrum pin 85 provided so as to be parallel to the rotation shaft 2a, is provided so as to protrude from the side plate 21La outward in the horizontal direction.
[0038]
The leveler lock bracket 86 is disposed at a position substantially orthogonal to the first lock arm 82, and has a hook-shaped notch at one end on the side of the first lock arm 82 around the fulcrum pin 85. At an end, a release pin 87 is provided so as to penetrate the side plate 21Lb and protrude toward the central working body 1 side. A spring 88 is provided on the outer peripheral surface of the central working body 1 on which the release pin 87 protrudes, so that the release pin 87 is always elastically held in the extending direction, that is, the leveler lock bracket 86 in the locking direction. .
[0039]
When the extension working body 2L is in the deployed state at the time of extension work, the tip of the release pin 87 contacts the side plate of the center cover 15 provided on the central working body 1 and moves in the contracting direction, thereby causing the leveler lock. The bracket 86 is turned to the release position and stopped. Therefore, the link body constituted by the first lock arm 82 and the second lock arm 83 can be bent, and the second center leveler 17 and the second side leveler 24L connected by the leveler connecting device 7 move in the vertical direction. This makes it possible to perform the scraping work for leveling the mud and the rubbing work for scraping the mud.
[0040]
Then, when the extension work body 2L is turned to the folded state at the time of moving and storing when not working, the leveler operation means 3 is used to switch to the soil closing work position b. At this time, the link body constituted by the first lock arm 82 and the second lock arm 83 becomes linear, and when the extension work body 2L starts folding and rotating, the release pin 87 is moved by the elastic force of the spring 88. Move in the extension direction. The leveler lock bracket 86 starts rotating in the locking direction with the fulcrum pin 85 as a fulcrum, and engages with the upper surface of the first lock arm 82 where the cutout portion of the leveler lock bracket 86 is linear. The refraction of the link body composed of the first lock arm 82 and the second lock arm 83 is fixed. With such a configuration, it is possible to suppress flapping of the first side leveler 23L and the second side leveler 24L in the folded state at the time of moving and storing when not working.
[0041]
【effect】
With the configuration described above, the mounting angle of the tractor mounting mast provided on the agricultural work machine can be easily changed by changing the stand mounting position, and the mounting angle of the mounting hitch provided on the rear of the tractor is inclined forward. It can also be detached from the tractor.
[Brief description of the drawings]
FIG. 1 is a plan view of a folding scraper. FIG. 2 is a rear view of the scraping device. FIG. 3 is a side view of the scraping device. FIG. 4 is a drive transmission diagram of the scraping device. FIG. 5 is a clutch of the scraping device. FIG. 6 is a perspective view of a clutch provided in the same scraping device. FIG. 7 is a side cross-sectional view of the same scraping device. FIG. 8 is a folding / rotating action diagram of left and right extension working bodies provided in the same scraping device. FIG. 9 is an enlarged view showing a connecting portion of an extension working body provided in the same scraping device. FIG. 10 is an enlarged view showing a connecting portion when the extension working body provided in the same scraping device is folded and rotation starts. FIG. 12 is an enlarged view showing the leveler connection of the same scraping device when folded and stored. FIG. 13 is an enlarged view showing the leveler connection portion of the same scraping device. FIG. 15 is a side sectional view of a part. Side cross-sectional view of the stand mounting part of the location Figure 16 is a side cross-sectional view of the stand mounting part of the rotary harrow according to a third embodiment EXPLANATION OF REFERENCE NUMERALS
DESCRIPTION OF SYMBOLS 1 Central working body 11 Center frame 11a Rotating bracket 11b Stand bracket 11c Notch 11d Through hole 11L, 11R Side plate 12 Transmission case 12a Input shaft 12b, 12c Bevel gear 12d Drive shaft 12e, 12f Sprocket 12g Chain 12h Output shaft 13 Tractor mounting Masts 13L, 13R Lower bracket 13T Top bracket 14 Central crushing rotary 14a Rotor shaft 14b Crushing claw 14c Claw holder 14d Bearing retainer 14e Bolts 14L, 14R Central crushing soil rotary 15 Center cover 16 First center leveler 17 Second center leveler 2a Rotating shaft 2L 2R Extension working body 21L, 21R Side cover frame 21La, 21Ra Side plate 21Lb Side plate 22a Bearing retainer 22L, 22R Side crushed rotary 22La, 22Ra Rotor shaft 23L, 23R First side leveler 24L, 24R Second side leveler 25L, 25R Side rotation bracket 3 Leveler operating means 31 Operating lever 32 Lock bracket 32a Lock pin 33 Connection plate 34 First leveler support arm 34a Lock plate 35 Second leveler support arm 4 Extension work lock device 41 Engagement plate 42 Engagement hook 42a Lever 43 Engagement bracket 43a Engagement pin 5 Folding lock device 51 Folding engagement hook 52 Folding engagement pin 53 Engagement groove 6 Clutch 61a Center Clutch rotor shaft 61b Side clutch rotor shaft 61c Claw holder 62 Engagement body 62a Engagement piece 63 Engagement body 63a Engagement piece 7 Leveler connecting device 71 Grounding auxiliary plate 72 Connecting piece 73 Extended grounding auxiliary plate 74 Lock plate 7 a Contact portion 74b Nipping surface 75 Support bin 76 Spring 8 Leveler fixing device 81 Support pin 82 First lock arm 83 Second lock arm 84 Bracket 85 Support pin 86 Leveler lock bracket 87 Release pin 88 Spring A Folding device G Gas sprig S Stand T Rear hitch

Claims (1)

A farm work machine mounted on a rear hitch of a tractor, comprising a stand for suspending the farm work machine, and a mounting angle adjusting mechanism for changing a posture of the farm work machine provided at a mounting portion of the stand. Machine.

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