JPS6230881Y2 - - Google Patents

Description

[Detailed description of the invention] The invention relates to a coupling device for an agricultural machine switching mechanism,
For example, the present invention relates to a system in which a working machine such as an automatically reversing dual plow is connected to a three-point suspension mechanism of a tractor, and the deflection and reversal of the dual plow is automatically switched in conjunction with the vertical movement of the three-point suspension mechanism.

Conventionally, as this type of automatic reversing dual plow, for example, a wire for deflecting and reversing the dual plow is installed between the working machine side equipped with the dual plow and the tractor, and the wire is installed between three points on the tractor. There is a structure in which the wire is pulled or relaxed in connection with the lifting and lowering movement of the working machine by a suspension mechanism, and the dual plow is deflected and reversed. In this case, a structure is adopted in which a wire connection mechanism for reversing the deflection of the dual plow is newly installed on the tractor or on the working machine side, and the base end of the wire is attached to this.

However, according to this structure, installing a new coupling mechanism on the tractor is fraught with many difficulties, and installing a new coupling mechanism on the work machine complicates the structure of the work machine and causes problems such as inconvenience in handling. have.

This idea was created with these points in mind.
A connection that locks interlocking media such as wires that switch the switching mechanism of the work equipment to the unused output shaft of the tractor when a work equipment that does not require the tractor's power is connected to the three-point suspension mechanism of the tractor. The connection of the agricultural machine switching mechanism that can solve the above problems at once by effectively utilizing the output shaft of the tractor without installing a new interlocking medium coupling mechanism on the tractor or work machine side. It provides equipment.

Next, an embodiment of the present invention will be described with reference to the accompanying drawings.

1 is a main frame, and this main frame 1 has a front frame part 2 formed in a channel shape, and a bar through hole 3 is bored in the front part thereof.
A lower link B as a three-point suspension mechanism of the tractor A is removably connected to this bar passage hole 3 via a hitch bar C, and a retaining metal fitting D is attached to the hitch bar C. Further, both side frame parts 4 are set upright on the front frame part 2, and a pin through hole 5 is bored in the upper part of this both side frame part 4.
A top link E as a three-point suspension mechanism of the tractor A is removably connected via a pin F, and a guide pin 6 as a guide is horizontally suspended between the frame portions 4 on both sides below the pin passage hole 5. ing. Further, at the rear of the front frame portion 2, a trifurcated upper, middle and lower step frame portion 7 is provided.
8, 9 are arranged in series, and these upper, middle and lower step frame parts 7, 8,
9 is provided with a through hole 10 that penetrates in the vertical direction,
The lower end of a stopper piece 11 is rotatably supported in the front and rear directions on a horizontal shaft 12 at the upper part of the upper frame part 7, and the stopper piece 11 is disposed between this stopper piece 11 and the protrusion at the rear end of the upper frame part 7. A tension spring 13 that urges the
is being strung up.

Further, reference numeral 14 denotes a main shaft metal fitting having a substantially fan shape as a switching mechanism, and a main shaft 15 rotatably inserted into the through hole 10 of the main frame 1 is fixedly and vertically fixed to the main shaft metal fitting 14 at an approximately middle portion thereof. At the same time, an arcuate long guide hole 16 with the main shaft 15 as the center is bored in the rear part of the main shaft fitting 14, and engaging recesses 17 and 18 are connected to the rear of both ends of the long guide hole 16. Locking pieces 19 and 20 are located on the sides of the engagement recesses 17 and 18 at both ends of the spindle fitting 14.
are set up facing each other. Further, the rear end of the spring hook 21 is attached to the front end of the main shaft metal 14 on the shaft 2.
A shaft rod 24 is rotatably supported in the horizontal direction via a shaft rod 2, and is provided protruding from the front upper part of the main frame 1 in a long hole 23 bored in the longitudinal direction of the middle part of the spring hook 21. The upper part is loosely fitted so that it can rotate freely.

Further, reference numeral 25 denotes a floating metal fitting as a switching mechanism, and this floating metal fitting 25 is pivotally supported on the upper protruding portion of the main shaft 15 of the main shaft metal fitting 14 so as to be freely rotatable in the horizontal direction. A stopper pusher 26 for pushing the stopper pusher 26 is supported so as to be movable forward and backward, and a tension spring 27 is stretched between the rear end of the stopper pusher 26 and the rear end of the floating bracket 25. The stopper pusher 26 is held in position by this tension spring 27.

Further, the main shaft fitting 14 is rotated to one side of the reference position x in the front-rear direction of the fuselage centering on the main frame 1, and the floating fitting 25 is rotated to the other side of the reference position x. The floating fitting 2 engages with the locking piece 19 at one end of the main shaft fitting 14 and is deviated from the reference position x by a predetermined angle α.
A tension spring 28 is stretched between the front end of the spring hook 5 and the pin 21a at the front end of the spring hook 21, and the tension spring 28 rotates the main shaft bracket 14 in the direction in which the floating bracket 25 is deflected. is set to.

Furthermore, a protruding rod 30 fixed to the stopper pressing metal fitting 26 is loosely fitted in an elongated hole 29 formed in the front-rear direction of the floating metal fitting 25 so as to be movable forward and backward. A top end of the protruding rod 30 is provided with a link body 31 as a universal joint.
One end of a wire 32 as an interlocking medium is fixed to the top 31. The wire 31 is guided forward, and the middle of the wire 32 is hung on a guide pin 6 that is hung on both side frame portions 4 of the main frame 1.
The other end of the coil spring 32a is engaged with a locking portion 34 of a coupling device 33, and the coupling device 33 is connected to the output shaft G of the tractor A.
(PTO shaft).

As shown in FIG. 3, the coupling device 33 has a block-shaped coupling 36 attached to one end of a round bar-shaped coupling shaft 35. An insertion hole 37 into which the shaft G is inserted is bored in the axial direction, and
A locking hole 38 is bored across one side of the insertion hole 37 in a direction perpendicular to this insertion hole 37.
A stopper pin 39 for preventing the removal of the output shaft G, which is inserted into the insertion hole 37 and engages in the reduced diameter recess H in the form of an annular groove, is detachably attached to the stopper pin 39. While rotation of the shaft G is allowed, the connector 36 is prevented from coming off. Further, a plurality of notched recesses 40 are formed at predetermined intervals on the other end of the connecting shaft 35, and a cylindrical locking fitting 42 having a communicating hole 41 corresponding to the notched recesses 40 is attached to the connecting shaft. A locking piece 43 having the locking portion 34 is integrally erected on one end of the locking fitting 42, and is slidably inserted into the other end of the locking fitting 42.
A locking pin 44 for preventing removal and for positioning is inserted into and inserted into a selected one of the notched recesses 40 from the communication hole 41 of the locking metal fitting 42 so as to be freely inserted and removed.

Next, a front plow body 45 and a rear plow body 46 as working machines are respectively attached to the rear part of the main frame 1 so as to be rotatable in the horizontal direction. That is, the front plow body 45 is mounted on one side arm 4 of the both-side arms 47 that are parallel to the main shaft 15 and are rotatable between the middle frame portion 8 and the lower frame portion 9 of the main frame 1.
While fixing the front end of 7 with the key 48,
The front end of the other side arm 47 of both side arms 47 is attached horizontally rotatably to a front shaft 49 located on the side of the main shaft 15 and suspended in parallel;
A beam 51 is attached to the rear end of both arms 47 via a rear shaft 50 so as to be rotatable in the horizontal direction, and a plow tip 53 and a plow spatula 54 are attached to the front of an inclined shaft 52 attached to the lower end of this beam 51. In addition to providing
A reversing rod 55 is attached to the rear of the tilting shaft 52. Further, the rear plow body 46 has front end portions of both side arms 57 attached to front shafts 56 on both sides provided between the upper frame portion 7 and the middle frame portion 8 of the main frame 1 so as to be horizontally rotatable. In addition, the beam 58, the tilting shaft 59, the plow tip 60, the plow spatula 61 and the reversing rod 6
2, etc., respectively, in the same manner as in the front plow body 45. Further, an intermediate portion of a front plow reversing handle 63 is pivotally supported on an upwardly protruding portion of a rear shaft 50 on one side of the front plow body 45, and a front portion of this reversing handle 63 is pivoted on a shaft 64 on one side arm 47. At the same time, the rear part of the reversing handle 63 is loosely fitted to the reversing rod 55, and the intermediate part of the rear plow reversing handle 65 is supported by a shaft 66 on the beam 58 of the rear plow body 46.
A reversal interlocking rod 67 is pivotally supported and spanned between the one side bent end of the reversal handle 65 and the one side protrusion of the one side arm 47 of the front plow body 45. The rear part of the reversing handle 65 is loosely fitted into the reversing rod 62.

In addition, in FIG. 1, 68 is the front plow body 4.
Reference numeral 5 indicates a plowing depth adjustment device, and reference numeral 69 indicates a fixing pin for suppressing displacement of the rear plow body 46. When this fixing pin 69 is removed, both arms 57 of the rear plow body 46 move to the front and rear shafts 56, 66, and thereby the rear plow body 46 can be deflected in the left-right direction. However, in this embodiment, the fixing pin 69 is not removed. In other words, both arms 57 of the rear plow body 46 are used in a fixed state.

Note that y in the figure indicates the center line of the reference position x.

Next, the operation of the above structure will be explained.

In the above configuration, plowing is performed while being pulled by the tractor A with the front plow body 45 and the rear plow body 46 inverted to either the left or right side.

First, assume that plowing is performed in a left-inverted state as shown in FIG. 4a. At this time, the main frame 1 including the front plow body 45 and the rear plow body 46 is lowered via the lower link B and the top link E, and the front plow body 45 and the rear plow body 46 are grounded. Then, as shown in FIGS. 5a and 5b, the main shaft fitting 1
4 is an engagement recess 1 connected to one end of the guide elongated hole 16
The stopper piece 11 attached to the main frame 1 is engaged in the inside of the main frame 1 to lock it, and the idler fitting 25 is engaged with the engagement recess 17 side with the main shaft 15 as a fulcrum by the tension action of the tension spring 28. Plowing work is performed in a state where the stopper piece 19 is in contact with the stopper piece 19. In this case, even if the output shaft G of the tractor A rotates, the output shaft G can freely rotate within the insertion hole 37 of the coupling device 36 of the coupling device 33 without being hindered by the stopper pin 39. The turning force is provided by the coupling device 33.
Moreover, the coupling device 33 is prevented from coming off by a stopper pin 39 inserted into the diameter-reducing recess H of the output shaft G.

Next, as shown in FIG.
When the point suspension mechanism is raised, as shown in FIG. 6a, the main frame 1 is lifted by the lower link B and the top link E, and the front plow body 45 attached to the rear end of the main frame 1 and the rear plow body 46 is lifted. In addition, one end of the connecting device 33 is locked to the block body 31 by lifting and rotating by the lower link B and the top link E, and the other end is connected to the output shaft G via the coil spring 32a. The wire 32 that is locked to the portion 34 is pulled, and the position of the wire 32 in contact with the guide pin 6 is rotated toward the connecting device 33, and the piece 31 at one end of the wire 32 and the piece 32 are attached. A stopper push metal fitting 26 fixed to the lower end of the protruding rod 30 via the protruding rod 30 presses the tension spring 2.
7, the stopper piece 11 is pulled forward by the tip of the stopper pusher 26, and the spring 1
3 to cause the stopper piece 11 to escape from the engagement recess 17 of the guide elongated hole 16 of the main shaft fitting 14. Therefore, when lifting the main frame 1 by the lower link B and the top link E, in this embodiment, the lower link B and the top link E have different turning radii at the time of lift-up. Since the angle of the front frame 4 with respect to the coupling device 33 after lifting is larger than the angle of the front frame 4 with respect to the coupling device 33, the distance between the coupling device 33 and the guide pin 6 before lifting is greater than the angle of the coupling device 33 after lifting with respect to the guide pin 6. The distance from the guide pin 6 increases, and the wire 32 is pulled by the changed distance.

In addition, since the floating metal fitting 25, which is energized by the action of the spring hanging metal fitting 21 and the tension spring 28, is in a state deviated from the reference position x by a predetermined angle α as described above, As shown in FIG. 6b, the locking piece 1 at one end is automatically rotated in the left direction in the figure.
The main shaft fitting 14 is rotated in conjunction with the rotating direction via the main shaft fitting 9 .

Also, due to this rotation of the main shaft fitting 14, the stopper piece 11 is positioned in front of the engagement recess 18 at the other end of the guide elongated hole 16, and the tension spring 13
is pulled and engaged in the engagement recess 18 by the return force of the stopper piece 11.
4 is locked in main frame 1.

As the main spindle fitting 14 rotates, both side arms 47 fixed to the main shaft 15 integrated with the main spindle fitting 14 via a key 48 are rotated, and are connected to this one side arm 47 via an inversion handle 63. The front plow body 45 that has been rotated is reversed to the right, and the rear plow body 46 connected to the one side arm 47 via the reversal linking rod 67 is reversed to the right, so that the front plow body 45 is reversed to the right as shown in FIG. 4b. Plow body 45 and rear plow body 46
is automatically reversed and set to the right in the direction of travel.

Next, as described above, the direction of the tractor A is changed while the front plow body 45 and the rear plow body 46 are lifted, and the three-point suspension mechanism of the tractor A is lowered in preparation for re-ploughing, as shown in FIG. 7a. , the front plow body 45 and the rear plow body 46 of the main frame 1 land on the ground, and the wire 32 that was pulled when the front plow body 45 and rear plow body 46 were lifted is automatically relaxed and pulled back. As shown in FIG. 7b, the floating bracket 25 automatically rotates around the main shaft 15 from the position shown by the chain line in the figure to the position shown by the solid line by the action of the spring hook 21 and the tension spring 28. It comes into contact with the locking piece 20 at the other end of the metal fitting 14 and is biased toward the next direction change.

Then, the front plow body 45 and the rear plow body 46, which have changed direction and been reversed and lowered by being towed by the tractor A, perform plowing.

Next, when changing direction to the outward route again at the terminal point of the return route, when the main frame 1 is lifted in the same manner as above, the wire 32, the main shaft bracket 14, the floating bracket 25, etc. operate in the same manner as described above, and the The plow body 45 and the rear plow body 46 are automatically switched and reversed to prepare for plowing on the outward trip.

In the embodiment described above, a double automatic reversing double plow was used as an example of the working machine, but the working machine is not limited to this, and may be a working machine such as a continuous plow, a triple plow, or a plow. In short, any working machine may be used as long as it is connected to and towed by tractor A, but does not use the output shaft (PTO shaft) of tractor A as its power source.

According to the present invention, the coupling device has an insertion hole in one end of the coupling shaft into which the output shaft of the tractor is inserted, and a stopper pin that is freely inserted and removed to engage in the diameter-reducing recess of the output shaft inserted into the insertion hole. and a locking fitting for locking an interlocking medium that switches and interlocks the switching mechanism of the working machine is selectively attached to the other end of the connecting shaft to connect the output shaft of the tractor and the switching mechanism of the working machine. Now that the device has been configured, connect the coupling device of this coupling device to the output shaft of the tractor, and connect the interlocking medium that switches and interlocks the switching mechanism of the work equipment that does not require the power of the tractor to the locking metal fitting of the coupling device. By using the above output shaft as a coupling mechanism for the interlocking medium, a dedicated coupling mechanism for the interlocking medium can be newly installed on the tractor or work machine side, and the output shaft of the tractor can be connected without complicating the structure of the tractor or work machine. can be effectively used for purposes other than transmitting power to work equipment, and by engaging the stopper pin with the diameter-reducing recess of the output shaft, the output shaft can be rotated without using any special locking means. The connecting shaft can be reliably connected without being interlocked with the connecting shaft, and can be prevented from coming out. Also, the locking fittings are selectively attached to the connecting shaft, so it can be adjusted according to the length of the interlocking medium and the switching operation of the switching mechanism. It is possible to operate the interlocking medium in a proper position, and therefore it is possible to provide a coupling device for a tractor that is simple in structure and highly practical.

[Brief explanation of the drawing]

The figures show one embodiment of the present invention, in which Fig. 1 is a side view of an automatic reversing dual plow using a coupling device, and Fig. 2
The figure is an exploded perspective view of the switching mechanism section, FIG. 3 is a perspective view of the coupling device, FIGS. 4a and 4b are plan views illustrating the overall operation, and FIGS.
b explains the function of each main part,
A is a side view, and b is a plan view. 14, 25... main shaft metal fittings constituting the switching mechanism,
Floating metal fitting, 32...Wire as interlocking medium, 3
3... Connecting device, 35... Connecting shaft, 36... Connecting tool, 37... Insertion hole, 39... Stopper pin, 4
0... Notch recess, 42... Locking metal fitting, 44... Locking pin, A... Tractor, G... Output shaft, H...
Reduced diameter recess.

Claims (1)

[Claims for Utility Model Registration] (1) One end of the connecting shaft has an insertion hole into which the output shaft of the tractor is inserted, and a stopper pin that engages in the diameter-reducing recess of the output shaft inserted into the insertion hole can be freely inserted and removed. An agricultural machine switching mechanism characterized in that a coupling device provided on the connecting shaft is attached to the other end of the coupling shaft, and a locking metal fitting for locking an interlocking medium that switches and interlocks the switching mechanism of the working machine is selectively attached to the other end of the coupling shaft. coupling device. (2) The agricultural machine according to claim 1 of the utility model registration claim, wherein the locking metal fitting is fitted into the connecting shaft so as to be freely retractable and the selected position is determined by a locking pin that can be inserted and removed. Connection device for switching mechanism.