JPH0737445Y2 - Mobile agricultural machine work machine connection structure - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] In the present invention, a working machine such as a rice transplanter, a seeder, a direct flooder, a fertilizer applicator, and a pressure roller is connected to the rear of the passenger machine body. Regarding the working machine connection structure of a mobile agricultural machine, more specifically, a connecting hitch mounted on the rear of the passenger machine via a lifting link mechanism and a connecting hitch mounted on the front of the working machine can be detachably connected to the working machine mounting of the mobile agricultural machine. Regarding the structure.

[Prior art]

For example, a passenger rice transplanter has a structure in which the rice transplanter is connected to the rear of an elevating link mechanism mounted to the rear of the passenger aircraft. The elevating link mechanism is composed of an upper link and a pair of left and right lower links, and a vertical coupling hitch is pivotally connected to the rear end of the elevating link mechanism. The connecting hitch installed in front of the rice transplanter is attached to and detached from the connecting hitch at the rear end of the lifting link mechanism.

[Problems to be solved by the invention]

By the way, in order to attach / detach the connecting hitch on the working machine side to / from the connecting hitch on the passenger body side, it is necessary to keep the connecting hitch on the working equipment side in a fixed state in the attaching / detaching posture. The stand equipped on the machine side has a structure in which the stand itself in the grounded state supports the entire rice transplanter, and the stand itself is long in the front-rear direction, so if it is inverted and fixed to the upper position in the working state, the inversion radius is also long. In addition, in the upper position, there is a problem that the stand protrudes to the working machine side for a long time and interferes with the work.

In view of the above-mentioned conventional circumstances, the present invention was devised to solve the problem, and effectively utilizes the rolling shaft provided on the connecting hitch side, and extends the front side of the rolling shaft extending below the lifting link mechanism. The purpose of the present invention is to provide a working machine connecting structure for a mobile agricultural machine that does not project to the working machine side during work and can be shortened in length by providing a stand at the projecting portion.

[Means for solving problems]

In order to achieve the above object, the present invention enables the working machine to be freely rolled in order to detachably connect a connecting hitch mounted on the rear of the passenger body through a lifting link mechanism and a connecting hitch mounted on the front of the working machine. The rolling shaft on the side of the connecting hitch to be supported is provided with an extending portion extending below the lifting link mechanism in front of the connecting hitch, and the extending portion has a stand for holding the connecting hitch of the grounded work machine in a detachable posture, It is provided so that it can be detached or fixed upside down.

[Action]

Therefore, even in the case where the connecting hitch 4 which is equipped behind the passenger body J via the lifting link mechanism 3 and the connecting hitch 9 which is equipped in front of the working machine H are detachably connected, the working machine H The rolling shaft 10 on the side of the connecting hitch 9 which rotatably supports is provided with an extending portion 10a extending below the elevating link mechanism 3 in front of the connecting hitch 4.
Mount stand 11 to the
By rotating and fixing 11 downward, the grounded work machine H
Since the connecting hitch 9 is held in the attachable / detachable posture, the connecting hitch 4 and the connecting hitch 9 can be attached / detached quickly and easily.

Further, the extending portion 10a provided on the rolling shaft 10 is located below the elevating link mechanism 3 in front of the connecting hitch 4, and is in a working state in which the stand 11 is removed from the extending portion 10a or the stand 11 is located at a lower position. Even in the working state in which the rolling shaft 10 is inverted and fixed to the upper position, the extending portion 10a of the rolling shaft 10 does not interfere with the work.

Further, the stand 1 provided on the extending portion 10a of the rolling shaft 10
Since 1 only needs to support the front of the grounded work machine H in the vertical direction, its height T is shortened, and the vertical reversal radius centered on the extension 10a can be shortened. The stand 11 located below can also be provided so that it can be turned upside down and fixed.

Further, as in the embodiment, when the connecting hitch 9 on the working machine H side is grounded in the forward tilted posture by α degrees with respect to the vertical line N, the height T of the stand 11 supporting the front of the working machine H is set to the front. The range of the tilt angle can be further shortened, and even the stand 11 located below the lifting link mechanism 3 can be provided so as to be vertically inverted and fixed without contacting the upper link 1 or the lower link 2 constituting the lifting link mechanism 3.

〔Example〕

 The present invention will now be described with reference to the drawings showing an embodiment.

As shown in FIG. 3, a working machine H such as a seeder is connected to the rear of the passenger body J, and a lifting link mechanism 3 including an upper link 1 and a pair of left and right lower links 2 is connected to the rear of the passenger body J. And a connecting hitch 4 arranged vertically is pivotally connected to the rear end of the elevating link mechanism 3.

The passenger aircraft J is equipped with a pair of left and right front wheels 5 and rear wheels 6, respectively. The front wheels 5 and the rear wheels 6 are of a four-wheel drive type in which both are driven, and the front wheels 5 are connected to a steering wheel 7. The steering mechanism is configured so as to be freely steerable. The up-and-down link mechanism 3 is vertically driven by a hydraulic expansion and contraction mechanism including a hydraulic cylinder and a piston (not shown).

A vertical connection hitch 9 is provided in front of the working machine H, and a fixed bracket 20 is fixed below the connection hitch 9 to a locking rod 17 which will be described later. Is a rolling shaft arranged in the front-back direction
10 is fixed. The lower part of the swing arm 23 provided on the working machine H side is supported by the rear projection of the rolling shaft 10 so as to be freely rollable.

The rolling shaft 10 is provided with an extending portion 10a which protrudes forward by a length L from the front surface of the fixed bracket 20. The extending portion 10a is in a connected state of the connecting hitch 4 and the connecting hitch 9. It extends beyond the lower part of the connecting hitch 4 toward the front, and extends below the lifting link mechanism 3.
The inside diameter of the mounting boss portion 11a of the stand 11 is rotatably fitted into the outside diameter of the extension portion 10a, and the butterfly bolt 12 is screwed into the nut 12a fixed to the outside diameter of the mounting boss 11a. There is.

By tightening the butterfly bolt 12, the mounting boss portion 11a of the stand 11 can be fixed to the extending portion 10a of the rolling shaft 10.
By loosening the butterfly bolt 12, the stand 11 can be removed from the mounting portion 10a of the rolling shaft 10.

The stand 11 is, as shown in FIG. 2 or 4,
It is composed of a mounting boss portion 11a and a leg portion 11b having an upper end fixed to the mounting boss portion 11a and having a grounding base 13 at the lower end. In this stand 11, the connecting hitch 9 has an angle of α degrees from the vertical line N. Since it suffices to support the front side of the working machine H as much as possible in the detachable posture inclining forward, the height T including the grounding base 13 and the lateral width B of the grounding base 13 are the radii about the axis of the rolling shaft 10. It can be made short to lie within R.

Since this radius R is a radius that does not contact the upper link 1 arranged on the upper side and the pair of left and right lower links 2 arranged on the lower side, the lower position shown by a solid line without removing the stand 11 ( It is possible to rotate from the grounding position) to the upper position (working position) indicated by the chain line and fix the upper position.

As shown in FIG. 5, the connecting hitch 4 is provided with a substantially U-shaped hook 14 fixed to both upper left and right sides, and a locking hole 15 at a lower position by cutting out the left and right side plates. Cage,
The locking rod 16 on the connecting hitch 9 side is fitted into the upper hook 14 from above, and the locking rod 17 on the connecting hitch 9 side is fitted into the lower locking hole 15 from the rear side. Further, a chucking lever 19 for locking the locking rod 17 is provided on the side surface of the connecting hitch 4 so as to be rotatable and fixed around a fulcrum shaft 19a.

Further, as shown in FIG. 4, the connecting hitch 9 is provided with an upper locking rod 16 and a lower locking rod 17 fixed to the left and right side plates, respectively, and the lower locking rod 17 is provided therewith. Rolling axis
The structure is such that the upper portion of a fixed bracket 20 which supports 10 in a fixed state is fixed. Further, as shown in FIGS. 1 and 4, mounting rods 21 are fixed to the left and right side plates of the connecting hitch 9, and the mounting rods 21 and the rolling shaft 10 on the working machine H side are pivoted in the left and right directions. A rolling spring 22 is stretched between the moving swing arm 23 and the swinging arm 23 so that the working machine H is maintained in a horizontal posture even when the passenger machine body J is tilted left and right.

Therefore, when connecting the connecting hitch 9 to the connecting hitch 4, the connecting hitch 9 is held in a detachable posture in which the connecting hitch 9 is tilted forward by an angle α with respect to the vertical line N, and the hook 14 on the connecting hitch 4 side is connected. It is necessary to engage with the locking rod 16 on the side of the rolling shaft 10.
Since it is held by the stand 11 attached to the 10a or the stand 11 pivotally fixed to the lower position, after operating the chucking lever 19 in the opening direction, the lifting link mechanism 3 can be used at the lower position of the connecting hitch 4 for riding. Move Aircraft J backwards. The hook 14 on the connecting hitch 4 side is the locking rod of the connecting hitch 9.
16 When the passenger body J is stopped at the time of being located below and the lifting link mechanism 3 is operated to be raised, the connecting hitch 9 in a state in which the locking rod 16 thereof is locked to the hook 14 on the connecting hitch 4 side is Due to the weight of H, the locking rod 17 on the lower side automatically locks the hole.
Fit to 15.

When the lifting link mechanism 3 is in the raised position, the checking lever is
By operating 19 to the closed position and locking the locking rod 17 fitted in the locking hole 15, the working machine H can be connected to the rear of the passenger body J easily and quickly.

When removing the work implement H, operate in the reverse order of the above,
The working machine H can be grounded in a detachable position in which the position of the connecting hitch 9 is inclined forward by the angle α with respect to the vertical line N.

Next, another example shown in FIGS. 6 to 8 will be described. In this example, an annular groove 31 is formed in the extending portion 10a of the rolling shaft 10, and the mounting boss 11a of the stand 11 is configured to be vertically flippable around the annular groove 31.

That is, the mounting plate 32 having an L-shaped cross section is fixed to the mounting boss 11a of the stand 11, and the connecting pin 33 is provided in the mounting hole formed in the mounting plate 32 and the mounting hole formed in the mounting boss portion 11a.
Has been inserted. A restricting pin 34 that abuts the outside of the mounting plate 32 and restricts the insertion depth of the tip is fitted into the connecting pin 33, and a snap ring 35 fitted and fixed to the connecting pin 33 and a mounting plate.
A spring 36 is provided between the inside of 32 and the inside of 32 to bias the restriction pin 34 to the outside of the mounting plate 32.

In addition, an annular groove 31 formed in the extending portion 10a of the rolling shaft 10
The flat portion 37 further engraved on one side surface of the annular groove 31.
And a recess 39 formed on the other side surface.
Therefore, when the stand 11 is rotated to the lower position (grounding position), the tip of the connecting pin 33 faces the flat surface portion 37, but there is a gap between the flat surface portion 37 and the tip of the connecting pin 33. s
Since the stand 11 swings in the left-right direction around the axis of the rolling shaft 10 at a predetermined angle, even if the grounding base 13 is grounded on a grounding surface with uneven horizontal surface, it can be grounded on one side. It does not become unstable.

Further, when the stand 11 is turned and rotated to the upper position (working position) indicated by the chain line, the tip of the connecting pin 33 is fitted into the recess 39, so that the inverted position of the upper position (working position) of the stand 11 is changed.
Can be supported in a fixed state. Since the connecting pin 33 is always fitted in the annular groove 31, the stand 11 can be positioned rotatably between the lower position and the upper position centering on the mounting portion 10a.

Although the example in which the seeding machine is connected has been described above, the connection structure of the present invention can also be connected to working machines such as a rice transplanter, a direct watering seeder, a fertilizer applicator, and a pressure roller.

[Effect of device]

INDUSTRIAL APPLICABILITY As described above, according to the present invention, in order to detachably connect the connecting hitch mounted on the rear of the passenger body through the lifting link mechanism and the connecting hitch mounted on the front of the working machine, the working machine can be rolled freely. The rolling shaft on the side of the connecting hitch that is borne by is provided with an extension that extends below the lifting link mechanism in front of the connecting hitch, and a stand is attached to this extension or the stand at the upper position is rotated downward. By fixing it, the connection hitch of the grounded work implement can be held in the attachment / detachment posture, so that the connection hitch and the connection hitch can be attached and detached quickly and easily, and the extension part provided on the rolling shaft is , Even when the stand is located below the lifting link mechanism beyond the connecting hitch and the stand is removed from the extension, or the stand is reversed and fixed in the upper position. Extending portion of the rolling shaft, or stand inverted fixed above position does not obstruct the work.

Furthermore, the stand provided at the extension of the rolling shaft need only be provided at a height that supports the front of the grounded work machine in the vertical direction. It can be configured to be fixed upside down.

[Brief description of drawings]

1 to 5 show one embodiment of the present invention, FIG. 1 is an overall side view of a seeder showing a grounded state and an inverted state of the stand, FIG. 2 is an enlarged perspective view of the stand, and FIG. The figure is an overall side view showing a state in which a connecting hitch of a seeder is connected to a connecting hitch of a passenger machine without a rice transplanter, FIG. 4 is a rear view of the connecting hitch, and FIG. 5 is a partial side view of the connecting hitch. . 6 to 8 show another example, FIG. 6 is an overall side view of the seeder showing the grounded state and the inverted state of the stand, FIG. 7 is a front view of the stand, and FIG. 8 is a locking groove. FIG. 3 is a partial side view of a stand shaft showing the. J …… Passenger aircraft, H …… Working machine, 1 …… Upper link, 2
...... Lower link, 3 ... elevating link mechanism, 4 ... Coupling hitch, 9 ... Connecting hitch, 10 ... Rolling shaft, 10a ...
… Extension part, 11 …… Stand, 11a …… Mounting boss part, 11b…
… Legs, 12 …… Butterfly bolts, 13 …… Grounding base, 14 …… Hooks, 15 …… Locking holes, 16 …… Locking rods, 17 …… Locking rods, 20
...... Fixed bracket.

Claims (1)

[Scope of utility model registration request] 1. A connecting hitch for removably connecting a connecting hitch mounted on the rear of a passenger body via a lifting link mechanism and a connecting hitch mounted on the front of the working implement so that the working implement can be rolled freely. The rolling shaft on the side is provided with an extension portion extending below the elevating link mechanism in front of the connecting hitch, and a stand for holding the connection hitch of the grounded work machine in the attachment / detachment position is detachable or attachable to the extension portion. Work implement connection structure for mobile agricultural machines that can be fixed upside down.