JP2005073681A - Foldable farm machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a foldable farm machine having such a driving and connecting structure that connecting bodies for transmitting drive are smoothly connected, without being damaged, and waviness, eccentricity, and an oscillation noise of a driving shaft and a driven shaft are absorbed, when the drive is transmitted. <P>SOLUTION: This foldable farm machine is so structured that a working body is foldable by dividing the body into two or three parts and a working width of the body is extended in the right and left directions by developing the body, wherein the connecting bodies are mounted on the driving shaft so that the working body is driven in a state that the working width is extended. An elastic material is attached to engaging parts of the connecting bodies, so that flexibility of the connecting bodies is brought about by elastic action of the elastic material, and therefore, the elastic material absorbs the eccentricity and smoothly transmits the rotational drive, even when shaft centers of a harrowing rotary and an extended harrowing rotary shaft are not positioned on a same axis and have an angle to each other so as to cause the eccentricity. Further, the elastic material absorbs the oscillation noise of the engaging parts of the connecting bodies. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a drive transmission configuration of a folding farm work machine.

As a background art, in a clutch device having a claw body that is provided at the shaft ends of a pair of rotating shafts and meshes with the shaft core in an oblique direction, the tip of the other claw body abuts on the claw body. A clutch device is known which is provided with an escape portion that leads to the shaft end face so as not to cause a problem. (Patent Document 1)
Japanese Patent Laid-Open No. 08-191609

  In the configuration of the above background art, the engagement surface of the clutch portion on the rotational direction side of the crushed soil rotary is hit by the non-uniform rotation due to the transmission angle of the power drive joint portion connected to the tractor, and vibration and noise are generated. There's a problem.

  In addition, there is a problem that vibration and noise are generated due to misalignment in processing, and the extended rotary shaft is swung and rotates eccentrically.

  Therefore, the present invention is smoothly connected without being damaged by the collision when the connecting body for driving transmission is fitted, and absorbs the undulation and eccentricity of the driving shaft and the driven shaft at the time of driving transmission to reduce vibration and noise. It is an object of the present invention to provide a folding farm machine having a drive connection configuration that can be reduced.

  In order to solve the above-mentioned problems, a central working body that can be mounted on a tractor and provided with a rotary crushed rotary, and a central working body that can be folded with respect to the central working body, and an extended crushed rotary to extend the working width to the left and right In the folding agricultural work machine, comprising a connecting body for connecting between the shafts of the extended ground breaking rotary of the extension working body and the ground breaking rotary of the central working body, the connecting work body is composed of an extended working body provided to be rotatable. Further, the present invention provides a folding farm machine characterized by having guides for positioning with each other and further coupled by a power transmission claw, and having an elastic body detachably provided between the power transmission claws.

  With the configuration as described above, the engagement operation of the clutch for transmitting the drive can be smoothly performed by the action of the guide body protruding on the outer peripheral facing surface, and the ground breaking rotary shaft as the driving shaft and the extended ground breaking as the driven shaft. Even if the shaft axis of the rotary shaft has a slight angle, the elastic body mounted on the power transmission pawl of the clutch that is the coupling body performs a flexible operation and can transmit the drive while maintaining the engagement of the clutch. Further, since the elastic body is made detachable, replacement due to wear or the like can be easily performed.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 is a cross-sectional view of a drive unit of a folding farm working machine embodying the present invention, FIG. 2 is an enlarged cross-sectional view of a connecting body, FIG. 3 is an enlarged perspective view showing a connecting body and an elastic body, and FIG. It is explanatory drawing which shows the connection process of a transmission nail | claw and an elastic body.

  In FIG. 1, A is a folding agricultural work machine, which is composed of one central work body and three foldable extension work bodies 2 and 2 that extend the work width to the left and right. The central working body 1 is provided with a center frame 11 extending to the left and right, a mission case 12 provided so as to be sandwiched in front of the center portion of the center frame 11, and a tractor mounting mast 13 further projecting forward of the mission case 12. An input shaft 12a protrudes from the front of the transmission case 12, and a universal joint is connected to transmit power from the PTO shaft of the tractor (not shown), and the tractor mounting mast 13 is not shown. It is attached to a three-point link mechanism.

  Reference numeral 5 denotes a folding lock device, which is arranged at both rear ends of the central working body 1 and fixes the extended working bodies 2 and 2 in a folded state when moving and storing during non-working. Folding engagement hooks 51, 51 that are elastically held in the locking direction and folding engagement pins 52 are provided on the extension rotation brackets 25, 25, and the extension working bodies 2, 2 are folded around. As it moves, the folding engagement pin 52 engages with the folding engagement hooks 51, 51, and the extension work bodies 2, 2 are fixed in the folded state at the time of moving and storing. The lock can be released by turning levers 51a and 51a provided on the folding engagement hooks 51 and 51 in the release direction.

  G is composed of a gas chamber sealed with high-pressure gas by a gas spring and a piston lot that compresses the piston lot. The piston lot has a repulsive force in the extending direction. By using this repulsive force, the extension work bodies 2 and 2 are folded. It assists dynamic movement.

  The drive transmission is not shown, but is transmitted to the input shaft 12a connected to the tractor PTO shaft via a universal joint, and is decelerated by bevel gears 12b and 12c provided in the mission case 12. A drive shaft 12d is provided in the horizontal direction by the bevel gear 12c, a sprocket 12e is provided at a substantially central portion, a chain 12g is installed on a sprocket 12f provided below the sprocket 12e, and further decelerated to lower end of the transmission case 12 Then, the driving force is transmitted to the output shaft 12h protruding left and right. On this output shaft 12h, crushed rotary 14 and 14 are assembled at both ends and are driven to rotate.

  The crushed rotary 14, 14 is configured such that the crushed claw 14 b can be detachably attached to a claw holder 14 c provided in a plurality of spirals on the circumference of the crushed rotary shafts 14 a, 14 a, and an outer end portion thereof is a bearing retainer 14 d. , 14d, and the mud can be crushed by being driven to rotate.

  The extended ground breaking rotary 22, 22 is configured to be detachable by having a ground breaking claw 14 b on a claw holder 14 c provided in a plurality of rows spirally on the circumference of the extended ground breaking rotary shafts 22 a, 22 a. The inner end is supported by the bearing retainer 14d, and the outer end is supported by bearing retainers 22b and 22b provided on the inner sides of the side plates 21a and 21a constituting the extension cover frames 21 and 21, and is rotatable. . A pair of connecting bodies 6 and 6 are provided at the outer ends of the crushed rotary rotary 14 and 14 and the inner ends of the extended crushed rotary 22 and 22, and the rotational force from the crushed rotary 14 and 14 is extended to the extended crushed rotary. 22 and 22 can be transmitted to the drive.

  FIG. 2 shows a drive transmission connecting portion to the extension working bodies 2, 2, and a connecting body 6 provided at an outer end portion of the soil breaking rotary 14, 14 and an inner end portion of the extended soil breaking rotary 22, 22, respectively. 6 includes a central connecting body 6a provided at the outer end of the ground breaking rotary 14 of the central working body 1 and an extended connecting body 6b provided at the inner end of the extended ground breaking rotary 22 of the extending working body 2. Is done.

  The central coupling body 6 a is provided with a clutch rotor shaft 61 fitted to a spline formed at a shaft end protruding from the bearing retainer 14 d of the soil breaking rotary shaft 14 a of the soil breaking rotary 14 at the end of the clutch rotor shaft 61. The clutch 62a is attached to the clutch attachment plate 61a, and the elastic body 63 is detachably attached to the clutch 62a.

  The extension coupling body 6b includes an extension clutch rotor shaft 64 fitted to a spline formed at a shaft end protruding from the bearing retainer 14d of the extension rotary shaft 22a of the extended soil breaking rotary 22, and an end portion of the extension clutch rotor shaft 64. The clutch 62b attached to the clutch attachment plate 64a provided in FIG.

  The structure and connecting operation of the connecting body 6 will be described with reference to FIGS. The central connection body 6a provided at both ends of the central work body 1 is provided with the extended connection body 6b provided at the inner ends of the extension work bodies 2 and 2 for extending the work width to the left and right with respect to the central work body 1. Come into. Then, the clutches 62a and 62b provided at the opposed shaft end portions of the central coupling body 6a and the extended coupling body 6b come into contact with each other. Reference numeral 621 denotes an engagement piece showing an embodiment of the guide body of the present invention. At the time of entering, the engagement piece 621 protruding from the outer peripheral facing surfaces of the clutches 62a and 62b is an angled inclined surface at the tip. The shaft core position is determined by meshing smoothly by contact.

  The clutch 62b is provided with several engaging pieces 621 on the outer periphery at equal pitches, and further provided with a power transmission claw 622 inside the engaging pieces. The clutch 62a is provided with several engagement pieces 621 on the outer periphery at equal pitches, and further provided with a power transmission claw 622 inside the engagement piece, and the power transmission claw is provided with a protruding piece for preventing the elastic body from coming off. It is. The elastic body 63 is a rubber material or a synthetic resin material.

  Moreover, even if the elastic core 63 is detachably attached to the rotary shaft rotating surface of the power transmission claw 622 of the clutch 62a, the shaft cores of the crushed rotary 14 and the extended crushed rotary 22 may have a small angle. The elastic body 63 attached to the attachment portions of the clutches 62a and 62a performs a flexible operation and can transmit the drive while keeping the engagement of the clutches 62a and 62b.

  Sectional drawing of the drive part of the folding agricultural work machine which implemented this invention   Enlarged sectional view of the connector   Enlarged perspective view showing the coupling body and the elastic body   Explanatory drawing which shows the connection process of a guide body, a power transmission claw, and an elastic body

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Central work body 11 Center frame 12 Transmission case 12a Input shaft 12h Output shaft 13 Tractor mounting mast 14 Crushed soil rotary 14a Crushed soil rotary shaft 14b Crushed soil claw 14d Bearing retainer 2 Extended work body 2a Rotating shaft 21 Extended cover frame 22 Extended ground broken rotary 22a Extension crushed rotary shaft 22b Bearing retainer 25 Extension rotation bracket 5 Folding lock device 51 Folding engagement hook 52 Folding engagement pin 6 Connection body 6a Central connection body 6b Extension connection body 61 Clutch rotor shaft 61a Clutch mounting plate 62a Clutch a
62b Clutch b
63 Elastic body 64 Extension clutch rotor shaft 64a Clutch mounting plate A Folding agricultural machine G Gas spring

Claims (1)

  A central work body equipped with a crushed rotary that can be mounted on a tractor, and a rotary work body, and an extended work body that can be folded with respect to the central work body and that can be rotated with an extended crushed rotary to extend the work width to the left and right. A folding farming machine provided with a connecting body for connecting the shafts of the extended crushed rotary of the extended working body and the crushed rotary of the central working body. A folding agricultural machine characterized in that it is further coupled by a power transmission claw, and an elastic body is detachably provided between the power transmission claws.

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