JPH08818Y2 - Working machine attachment / detachment device for riding agricultural machinery - Google Patents

Description

[Detailed Description of the Invention] (a) Industrial field of application The present invention relates to a riding agricultural machine in which a working machine such as a fertilizer applicator, a sowing machine, or a planting machine is detachably attached to a rear portion of the machine through a link. .

(B) Conventional technology In a conventional riding agricultural machine such as a tractor, when a work machine is detachably attached to the rear portion of a pair of left and right top links connected to the machine, on the other hand, from the PTO shaft of the machine to the work machine. It is necessary to make the transmission shaft that is transmitted to
On the other hand, since the transmission shaft is connected through a universal joint so that it can be transmitted even when the working machine is moved up and down, a hitch frame is attached to the rear portion of the link, and the transmission shaft is supported by this hitch frame. It was

(C) Problems to be solved by the invention Since the work attaching / detaching device in the known riding agricultural machine has the hitch frame attached to the rear portion of the link in order to support the transmission shaft, the structure becomes complicated and is eliminated. In order to simplify the structure, the separated transmission shaft hangs down, and when the work implement is lowered to be removed, there arises a problem that the transmission shaft collides with the ground and is damaged before the work implement touches the ground.

(D) Means for solving the problems In order to solve the problems, the technical means adopted by the present invention is to attach a detachable work machine to the rotating tip of the link mounted on the machine body so that the work machine can be moved up and down. In addition, in a riding agricultural machine in which the front end of the transmission shaft connected to the transmission case of the working machine via a universal joint is connected to the PTO shaft at the rear of the machine body so that it can move freely up and down, the transmission shaft that rotates vertically with the working machine. When the front end of the power transmission shaft is separated from the machine body by attaching the receiving frame to the lower part of the machine, the power transmission shaft that tilts forward and downward when the front end of the power transmission shaft is separated from the machine body is kept in the standby position for connecting to the PTO shaft. It is characterized in that it is supported by the receiving frame of the working machine.

(E) Operation Therefore, according to the present invention, when the working machine is detached from the link of the machine, the connecting portion located at the front end of the transmission shaft is separated from the machine body while the working machine is being raised, and if necessary. The operating means is also separated, and the transmission shaft is supported by the receiving frame provided in the front part of the working machine to maintain the state of being inclined forward and downward.

Then, when the link is rotated downward in the above state, the working machine connected to the link by the hooking system is grounded and separated from the link, but at this time, the transmission shaft is supported by the receiving frame, so that it is not grounded. There is no collision.

(F) Embodiment A passenger rice transplanter according to an embodiment of the present invention will be described. A body 1 of the passenger rice transplanter has a mission case 3 attached to a front portion of a main frame 2, and the mission case 3 moves forward. The engine covered by the bonnet 4 is mounted on the projecting engine frame, the front axles 5 and 5 are pivotally supported by the front axle extending from the mission case 3 to both sides, and the mission case is mounted on the rear of the main frame 2. A rear wheel 8, 7 is pivotally supported by a rear axle case 7, 7 that is transmitted through a propeller shaft 6 by means of 3, and a top link 11 and a pair of left and right lower links 12, 12 are mounted on a bracket 10 standing on the rear portion of the main frame. Of the pins 13 and 13 inserted into the rear ends of the lower links 12 and 12 so that the top link 11 is moved up and down by a hydraulic cylinder. Brackets 15 and 15 are erected on the end,
These brackets 15 and 15 are connected by a horizontal rod 16, and the lower end of the top link 11 is rotatable by a pin 17 on the upper part of a pair of left and right brackets 18 and 18 whose lower ends are pivotally attached to the horizontal rod 16. And the brackets 18 and 18 have a V-shaped receiving member 20 at the upper end.
The hook-shaped latches 21 and 21 curved downward toward the lower part are fixed to the fulcrum fulcrum pin 22, and the latches 21 and 21 are biased downward by the springs 23 and 23. An operating rod 26 whose upper end is bent laterally to form a gripping portion is connected to a pin 25 of the latch 21.

The operating rod 26 is loosely fitted in a T-shaped guide groove 27a of a guide plate 27 fixed to one bracket 18, has a stopper nut 28, and is constantly urged downward by a roll pin 29 made of a spring. Therefore, the operating rod 26 is rotated upwards against the roll pin 29 to rotate the stopper nut 28.
When the lever is passed through a wide upper portion of the guide groove 27a and lowered, the stopper nut 28 is received by the vertical portion of the guide groove 27a, and the latch 21 is held in the ascending / rotating posture. Raise 26 and latch 2
1, 21 are rotated downward by springs 23, 23, the stopper nut 28 moves rearward through a wide portion above the guide groove 27a, and the roll pin 29 rotates the operating rod 26 downward to rotate the guide groove 27a. The stopper nut 28 is fitted in the narrow vertical portion and contacts the rear surface of the guide groove 27a to prevent the latch 21 from rotating upward.

The input shaft 34a of the planting device 34 is driven by the PTO shaft 30 of the mission case 3 via the intermediate shaft 31a, the transmission shaft 31 and the universal joints 32 and 33 before and after the transmission shaft 31, and is provided at the front end of the transmission shaft 31. The universal joint 32 is connected to the intermediate shaft 31a by a coupler 35 so that the universal joint 32 can be transmitted and received and separated.

In addition, a pair of left and right support members 38, 38 are directed forward on the pipe frame 37 with a transmission shaft that connects the front portion of the main transmission case 36 of the planting device 34 and the front portions of the left and right transmission cases. The upper part of the front end is fitted with rolling stoppers 39, 39, and the inner surface of the rear part is a receiving frame 40 whose lower part is bent toward the center of the machine width.
Is arranged so as to face below the transmission shaft 31 that rotates up and down together with the planting device 34, and when the front connecting portion of the transmission shaft 31 is separated, the rear portion of the transmission shaft 31 is received by the receiving frame 40. It is configured to receive and support the transmission shaft 31 in a state of being inclined downward and forward.

The receiving frame 40 does not come into contact with the transmission shaft 31 even when the planting device 34 is raised to the highest position.

Reference numeral 41 denotes a connecting frame that is erected on the front of the main transmission case 36. The receiving pin 42 for engaging the receiving members 20, 20 is fixed to the upper portion thereof, and the latch 21 is engaged to the lower portion thereof. The receiving pin 43 is fixed, and a recess 44 that fits into the lower receiving pin 43 is provided near the lower part of the rear surface of the brackets 18, 18.

45 is a link rod that transmits the elevation of the front of the float 46 to the control valve of the hydraulic cylinder,
The intermediate portion has an offset metal 47 and a joint 48. The joint 48 has a deformed hole 50 at one end and a deformed portion provided at the other end and fitted into the deformed hole 50.
51, a latch 53 pivotally attached to one end and biased by a spring 52 for engagement, and a receiving pin 55 projecting from the other end, and formed on the lower surface of the offset gold 47. The fixed inverted U-shaped metal fitting 54 is fitted from above to the transmission shaft 31 which is separated and supported by the receiving frame 40 to support the rear portion of the link rod 45 when the joint 48 is in the detached state. To do.

56 is a marker wire, the middle part of which is divided, and the rear end of the front part of the outer part is fixed by an outer stopper 57 on the top link 11, and the front end part of the outer part of the rear part is on the top link. Connecting device fixed to 58
In the connection state, the lever 59 is tilted and locked so that the split portion of the inner wire is engaged and disengaged in the connecting device 58.

Further, the connecting shaft 60 at the front part of the universal joint 32 connected to the front part of the transmission shaft 31 is a deformed part in which both side surfaces are shaved in parallel, and a conical hole 61 is formed in one arc-shaped part.
The coupler 35 is attached to the rear end of the intermediate shaft 31a which is connected to the PTO shaft 30 and whose rear part is supported by the rear part of the main frame 2 via the bracket 2a. A deformed hole 63, which is connected to the rear end of the intermediate shaft 31a by a pin 62, and in which a deformed portion of the connecting shaft 60 fits in the shaft center portion, and a radial locking hole in which the inner end has a slightly smaller diameter. A connecting pipe 66 having a 65, and a locking tool 67 composed of a ball fitted in the locking hole 65 and fitted in the hole 61.
And a locking ring 70 that is slidably fitted around the outer circumference of the connecting pipe 66, is urged rearward by a winding spring 68, and is received by a retaining ring 69. In this state, the locking ring 70 is moved forward against the winding spring 68, and the large diameter portion of the inner circumference faces the locking tool 67, so that the connecting shaft 60 can be pulled out. When the shaft 60 is connected to the coupler 35, the front end of the intermediate shaft 31a is connected to the PTO shaft 30 of the mission case 3, and the PTO shaft 30 has the same plant body 7 as the conventional one.
As shown in FIG. 1, 1 is provided with a fixed-position stop clutch that disengages at a raised position, so that the intermediate shaft 31a is provided with the engaging member 67.
Will stop when it is located on the axis, and the connecting shaft 60 is brought into a state where the hole 61 is right above, and in this state, the locking ring 70 is pushed forward to move the connecting shaft 60 into the deformed hole 63. When the locking ring 70 is released, the locking ring 70 is moved backward by the winding spring 68 and pushes the locking tool 67 into the hole 61 so that the locking ring 67 is locked. At this time, the hole 61 becomes a matching mark for connection.

In the above-mentioned riding rice transplanter, when removing the planting device 34,
Remove the connecting part to the marker wire 56, hang the end of the rear part on the upper end of the support arm 72, push the locking ring 70 of the coupler 35 forward, and pull out the connecting shaft 60 of the universal joint 32. It is supported by the receiving frame 40 and maintains a state of being inclined downward to the front. Then, the link rod 45 is separated by the releasing operation of the connecting device 58, the metal fitting 54 is fitted on the transmission shaft 31, and is placed on the transmission shaft 31, and the operating rod 26 is pulled up and then pulled forward to pull the stopper nut 28 into the guide plate 27. The latch 21 is removed from the receiving pin 43 by being locked to the front surface of. When the top link 11 is rotated downward by the hydraulic cylinder in this state, the stand 73 in the lowered posture of the planting device 34 is grounded, and the upper and lower receiving pins 42, 43 are separated from the receiving plate 20 and the recess 44, The connection between the planting device 34 and the links 11, 12 is released.

At this time, since the transmission shaft 31 descends together with the planting device 34 while maintaining the frontward and downward inclined state supported by the receiving frame 40, the transmission shaft 31 may be damaged by colliding with the ground. Absent.

Further, when connecting the planting device 34, the receiving pin 20 receives the receiving pin 20 with the top link 11 and the lower link 12 lowered.
If you raise the planting device 34 directly below the
20 is fitted to the lower surface of the receiving pin 42, and when the device 34 is further raised, the recess 44 is fitted to the receiving pin 43. Therefore, when the operating rod 26 is tilted upward, the latches 21,21 are pulled by the springs 23,23 and pivoted downward to engage with the receiving pins 43, thereby connecting the main body of the planting device 34 and the links 11,12. Is completed.

Next, after connecting the marker wire 56 and the link rod 45, the transmission shaft 31 is connected to the PTO shaft 30. At this time,
While the planting device 34 is being raised as described above, the transmission shaft 31 retains the connection standby position to the PTO shaft 30 by the support of the receiving frame 40, that is, the inclined position facing the coupler 35 located in the lower front. Therefore, the coupling shaft 60 of the universal joint 32 at the rear of the transmission shaft 31 and the coupler 35 can be coupled easily and quickly.

(G) Effect of the Invention In short, according to the present invention, a detachable work machine is mounted on the pivoting tip of the link mounted on the machine body 1 so as to be able to move up and down, and a transmission case of the work machine is provided via a universal joint. In the riding agricultural machine in which the front end of the connected transmission shaft 31 is connected to the PTO shaft at the rear part of the machine body 1 so as to be able to come into contact with and separate from the PTO shaft, face the lower side of the transmission shaft 31 that rotates up and down together with the working machine, and work the receiving frame 40. When the front end of the transmission shaft 31 is attached to the front part of the machine and the front end of the transmission shaft 31 is separated from the machine body 1, the transmission shaft 31 tilts forward and downward.
Is supported by the receiving frame 40 of the working machine while maintaining the standby position for coupling to the PTO shaft. Although it does not hinder the rotation operation at all, when removing the working machine, the connecting part of the transmission shaft can be easily separated while raising the working machine once to secure a working space. By supporting the transmission shaft just separated from the machine body with the receiving frame, it is possible to prevent the transmission shaft from accidentally falling on the ground, and at the same time, the receiving frame 40 of the raised work machine can support the transmission shaft to the PTO. Standby position for connection to the axis,
In other words, since the bearings are supported while maintaining the forward tilting posture, there is no inconvenience that the transmission shaft collides with the ground surface even when the working machine is lowered in this state. The universal joint of the transmission shaft 31 is also increased because the transmission shaft 31 supported by the receiving frame 40 also rises while maintaining the inclined posture to the front lower side together with the working machine that rises.
The PTO shaft can be easily brought close to the connecting position of the PTO shaft, and the connecting work between the PTO shaft and the transmission shaft 31 can be performed quickly, which is a very useful practical effect.

BRIEF DESCRIPTION OF THE DRAWINGS The drawings show one embodiment of the present invention. FIG. 1 is a side view of a riding rice transplanter, FIG. 2 is a side view with a planting device removed, and FIG. A plan view of the rear connecting portion of the link, FIG. 4 is a side view of the same, FIG. 5 is a rear view of the same, FIG. 6 is a side view of essential parts, FIG. 7 is a front view of the same, and FIG. A plan view of the link rod, FIG. (B) is a side view of the same as above, FIG. (C) is a side view showing a separated state, and (d) of FIG.
9E is a sectional view of the transmission shaft and its connecting portion, FIG. 9B is a vertical plan view of the connecting portion, and FIG. 9C is a C of the coupler. It is a -C arrow line view. 1 ... Aircraft, 11 ... Top link, 12 ... Lower link,
21 …… Latch, 26 …… Operating rod, 30 …… PTO shaft, 31 …… Transmission shaft, 32,33 …… Universal joint, 34 …… Planting device, 35 …… Coupler, 36 …… Transmission case, 40 …… Received frame,
42,43 …… Receiving pin, 45 …… Link rod, 56 …… Marker wire

Claims (1)

[Scope of utility model registration request] 1. A front end of a transmission shaft 31 is attached to a rotating tip of a link attached to a machine body 1 so that a detachable working machine can be lifted and lowered, and is connected to a transmission case of the working machine via a universal joint. In a riding agricultural machine that is connected to the PTO shaft at the rear of the machine body 1 so as to be able to come into contact with and separate from the PTO shaft, the receiving frame 40 is attached to the front part of the work machine by facing it under the transmission shaft 31 that rotates vertically with the work machine. When the front end of the shaft 31 is separated from the machine body 1, the transmission shaft 31 inclined forward and downward is supported by the receiving frame 40 of the working machine while maintaining the standby position for connecting to the PTO shaft. A work machine attachment / detachment device for a riding agricultural machine.