JPH11318106A - Apparatus for connecting working machine to tractor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus for connecting working machines to a tractor enabling the optimum connection of larger number of working machines with a single connection frame. SOLUTION: A connection frame 6 is connected to a tractor body 2 through a three-point link mechanism 5 having a top link 3 and a pair of right and left lower links 4, an upper engaging part 10 and a pair of right and left lower engaging parts 11 of a working machine 9 are engaged with the connection frame 6 by forming an upper connection part 7 and a pair of right and left lower connection parts 8 and the PTO shaft 12 of the tractor body 2 is connected to the PIC shaft 13 of the working machine 9 through a joint shaft 14. Two or more kinds of working machines 9 having different distances between the upper engaging part 10 and the lower engaging parts 11 are connected by using two or more lower connection parts 8 having different distances from the upper connection part 7 based on the position of the upper connection part 7 of the connection frame 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tractor working machine coupling device, and more specifically, to a plurality of working machines of different categories, such as a standard three-point link specification working machine and a special three-point link specification working machine. The present invention relates to a working machine connecting device in which different types of working machines are connected using one (same) connecting frame.

[0002]

2. Description of the Related Art A tractor working machine in which a plurality of types of working machines are connected by using a single connection frame (called a quick coupler or an auto hitch) for standardizing a top link and left and right lower links. The connecting device is disclosed in
It is publicly known in JP-A-3-36702.

In this known technique, a connecting frame is connected to a tractor body via a three-point link mechanism having a top link and a pair of left and right lower links, and an upper connecting portion and a pair of left and right lower connecting portions are connected to the connecting frame. The upper engaging portion and the pair of left and right lower engaging portions of the working machine are respectively engaged to form the P of the tractor body.
The TO shaft and the PIC shaft of the working machine are connected by a joint shaft.

[0004] The position of the upper connecting portion is adjustable so that a plurality of types of working machines having different distances from the upper engaging portion to the lower engaging portion in the working machine can be connected.

[0005]

In the above-mentioned prior art, a work machine to be mainly mounted can also be connected only by an upper connecting portion whose position can be adjusted, and a positional relationship between a lower connecting portion and a rear connecting point of a lower link. Is invariable, the positional relationship between the upper connecting portion and the rear connecting end of the top link, the positional relationship between the connecting frame and the PIC shaft, and the like are variable. It is difficult to link.

[0006] In addition to the work machine of the European and American standard three-point link specification and the work machine of the special three-point link specification unique to Japan,
The distance from the upper engaging portion to the lower engaging portion may be slightly different, making it difficult to cope with the working machine. Further, there are a plurality of categories of the three-point link mechanism, such as category 1 to category 4, category IN, etc., and it is preferable that the connection point interval of the left and right lower links in the connection frame, the left and right lower connection portion interval, and the like be wider. In some cases, it is better to be narrower, but it is difficult to change the interval in the above-mentioned known technology, so that it is difficult to correspond to a plurality of categories.

The present invention has been made in view of the above-described various points, and has as its object to provide a tractor working machine connecting device capable of more appropriately connecting a larger number of working machines with one connecting frame.

[0008]

A first concrete means for solving the problem in the present invention is to connect a tractor body 2 via a three-point link mechanism 5 having a top link 3 and a pair of left and right lower links 4. The frame 6 is connected, and an upper connecting portion 7 and a pair of left and right lower connecting portions 8 are formed on the connecting frame 6 to engage the upper engaging portion 10 and the pair of left and right lower engaging portions 11 of the working machine 9, respectively. In addition, the PTO shaft 12 of the tractor body 2 and the PIC shaft 13 of the work machine 9 are connected by a joint shaft 14, and the distance between the upper engaging portion 10 and the lower engaging portion 11 is different.
In order to connect more than two types of working machines 9, two or more lower connecting portions 8 having different distances from the upper connecting portion 7 with respect to the position of the upper connecting portion 7 in the connecting frame 6 are provided. is there.

Thus, the upper engaging portion 10 is moved from the lower engaging portion 11 with reference to the position of the upper connecting portion 7 in the connecting frame 6.
Two or more types of working machines 9 having different distances to each other can be connected. A second specific means for solving the problem in the present invention is that, in addition to the first specific means, one of the two or more lower connecting portions 8 is fixed in position and the other is fixed. That is, it can be changed freely.

Thus, the upper engagement portion 10 is moved from the lower engagement portion 11 to the lower engagement portion 11 with reference to the position of the upper connection portion 7 in the connection frame 6.
It is possible to connect two or more types of working machines 9 having different distances to each other, in particular, working machines 9 having slightly different distances. A third concrete means for solving the problem in the present invention is that a tractor body 2 has a top link 3 and a pair of left and right lower links 4.
The connecting frame 6 is connected via a three-point link mechanism 5 having
An upper connecting portion 7 and a pair of left and right lower connecting portions 8 are formed on the connecting frame 6 to engage the upper engaging portion 10 and the pair of left and right lower engaging portions 11 of the working machine 9 respectively. PTO shaft 1
2 and a PIC shaft 13 of the working machine 9 are connected by a joint shaft 14, and a holder 15 for holding the joint shaft 14 is provided on the connection frame 6.
0 and / or two or more types of working machines 9 having different distances to the lower engagement portion 11, the distances from the holders 15 differing based on the position of the holders 15 in the connection frame 6. The point is that the upper connecting portion 7 and / or the lower connecting portion 8 are provided at more than the locations.

Thus, the holder 1 in the connecting frame 6
5 from the PIC shaft 13 to the upper engaging portion 10.
And / or two or more types of working machines 9 having different distances to the lower engaging portion 11 can be connected. The fourth specific means for solving the problem in the present invention is, in addition to the third specific means, an upper connecting portion 7 and / or a lower connecting portion 8 at two or more locations.
The position of one is fixed and the other is freely changeable.

Thus, the holder 1 in the connecting frame 6
5 from the PIC shaft 13 to the upper engaging portion 10.
And / or two or more types of working machines 9 having different distances to the lower engaging portion 11, in particular, working machines 9 having slightly different distances can be connected. A fifth specific means for solving the problem in the present invention is to connect a connecting frame 6 to a tractor vehicle body 2 via a three-point link mechanism 5 having a top link 3 and a pair of left and right lower links 4. 6 is formed with an upper connecting portion 7 and a pair of left and right lower connecting portions 8 to form an upper engaging portion 1 of a working machine 9.
0 and a pair of left and right lower engaging portions 11 are engaged with each other, and a PTO shaft 12 of the tractor vehicle body 2 and a PIC shaft 13 of the work machine 9 are connected by a joint shaft 14.
In order to connect three or more types of working machines 9 having different distances from the lower connecting portion 8 to the lower engaging portion 11, two positions having different distances from the lower connecting portion 8 based on the position of the lower connecting portion 8 in the connecting frame 6 are referred to. That is, the upper connecting portion 7 is provided at the above position.

This makes it possible to connect two or more types of working machines 9 having different distances from the lower connecting portion 8 with reference to the position of the lower connecting portion 8 in the connecting frame 6, and to mainly use the working machine Can be connected reliably and stably. A sixth specific means for solving the problem in the present invention is that, in addition to the fifth specific means, one of the two or more upper connecting portions 7 is fixed in position and the other is fixed. That is, it can be changed freely.

Thus, the upper engaging portion 10 and the lower engaging portion 11 can be moved with reference to the position of the lower connecting portion 8 in the connecting frame 6.
It is possible to connect two or more types of working machines 9 having different distances to each other, in particular, working machines 9 whose distances are slightly different from each other, in addition to the main body mounted working machine. A seventh concrete means for solving the problem in the present invention is to connect a connecting frame 6 to a tractor vehicle body 2 via a three-point link mechanism 5 having a top link 3 and a pair of left and right lower links 4. 6 is formed with an upper connecting portion 7 and a pair of left and right lower connecting portions 8 to form an upper engaging portion 1 of a working machine 9.
0 and a pair of left and right lower engaging portions 11 are engaged with each other, and a PTO shaft 12 of the tractor vehicle body 2 and a PIC shaft 13 of the working machine 9 are connected by a joint shaft 14. In order to connect two or more types of working machines 9 having different distances from the lower engaging portion 11 to the lower engaging portion 11, the distance from the lower connecting portion 8 is different based on the position of the lower connecting portion 8 in the connecting frame 6. The upper connecting portion 7 is provided at a position more than
That is, the lower connecting portion 8 of the connecting frame 6 and the connecting point 16 of the lower link 4 are arranged substantially concentrically.

Thus, two or more types of work having different distances from the upper engaging portion 10 to the lower engaging portion 11 with reference to the positions of the lower connecting portion 8 and the connecting point 16 of the lower link 4 in the connecting frame 6. Machine 9 can be connected. Eighth concrete means for solving the problem in the present invention is, in addition to any one of the first to seventh concrete means, a connection point 16 of the left and right lower links 4 in the connection frame 6 and / or a left and right lower connection. That is, the left and right intervals of the portion 8 can be adjusted.

Thus, the connection point 16 of the left and right lower links 4 and / or the left and right lower connection portions 8 are enlarged and reduced to make the distance between the left and right lower links 4 different and / or the distance between the left and right lower engagement portions 11 is delicate. Different working machines 9 can be connected. A ninth concrete means for solving the problem in the present invention is, in addition to any one of the first to seventh concrete means, a connecting point 16 of the left and right lower links 4 in the connecting frame 6 and / or
Alternatively, a plurality of sets of the left and right lower connecting portions 8 are provided with different left and right intervals.

As a result, the connection point 16 of the left and right lower links 4 and / or the left and right lower connection portions 8 are stepwise enlarged and reduced,
The distance between the left and right lower links 4 is made different and / or the working machine 9 whose distance between the left and right lower engaging portions 11 is slightly different can be connected. A tenth specific means for solving the problem in the present invention is that, in addition to any one of the first, second, fifth and seventh specific means, a holder 15 for holding the joint shaft 14 on the connection frame 6 is provided. That is, it is provided so as to be able to change the vertical and / or front and rear positions freely.

Thus, when the working machine 9 is connected to the connection frame 6 with reference to the position of the upper connection portion 7 or the lower connection portion 8, the vertical and / or front-back position of the PIC shaft 13 is changed. Also, the joint shaft 14 is properly held by the holder 15.

[0019]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 5 show a first embodiment of a tractor working machine coupling device according to the present invention, in which a working machine 9 exemplified by a rotary cultivator is in a standard state (attached state with a standard three-point link specification). The special three-point link specification mounting state is achieved by changing the top link 3 and the top link bracket 26 described later to those of a special three-point link specification.

In both cases, the same tractor body 2, the same connection frame 6 and the same joint shaft 14 for stabilizing the three-point link mechanism 5 are used. The tractor vehicle body 2 has a top link bracket 26 fixed on the upper rear surface, a work implement lifting / lowering device 27 having a hydraulic cylinder mounted on the rear upper surface, a lower link pin 30 on the lower rear portion of the tractor vehicle 2, and a PTO shaft 12. Is projected rearward from substantially the center of the rear surface.

The three-point link mechanism 5 has a top link 3 and a pair of left and right lower links 4, and a front connection portion 3R of the top link 3 is connected to a top link bracket 26 via a pin. The front connecting portion 4F is connected to the lower link pin 30, and the lower link 4
Is connected to a lift arm 28 of a work machine elevating device 27 via a lift rod 29, and can be moved up and down freely.

A connecting frame 6 is connected to the rear end of the three-point link mechanism 5, that is, the rear ends of the top link 3 and the left and right lower links 4. Standard three-point link specification (or special three-point link specification)
The work machine 9 is detachably connected by elevating the elevating device 27, and the PTO shaft 12 and the PIC shaft 13 are connected by the joint shaft 14.

In the working machine 9, a support case 34 is projected right and left from a gear case 33 with the PIC shaft 13 projected forward, and a transmission case and side frames are fixed to outer ends of the left and right support arms 34 to form a rotary machine frame 35. And
The pawl shaft is rotatably supported by the transmission case and the lower part of the side frame, and a large number of tilling claws are attached to the pawl shaft.

The top mast 3 is mounted on the gear case 33.
6, a connecting bracket 37 protruding forward is fixed to the left and right support arms 34, and a support frame extending rearward is swingably connected to the left and right support arms 34. The height between the support frame and the top mast 36 is high. An adjustment mechanism is provided to adjust the height of the cultivator or the rear two wheels mounted on the rear part of the support frame.

The pin at the front upper end of the top mast 36 of the working machine 9 forms the upper engaging portion 10 and the left and right connecting bracket 37
The lower pin 11 forms a lower engaging portion 11. Linking frame 6
Is a square pipe (or a round pipe, flat bar, etc.)
The main frame 41 has a main frame 41 formed in a substantially A-shape when viewed from the rear. An upper body 42 is fixed to the upper center of the main frame 41, and a lower body 43 is fixed to lower left and right portions. The main frame 41
And the left and right lower bodies 43 are connected to the main frame 41 by a lower reinforcing member 45 formed of the same material or a flat bar, and the upper and lower reinforcing members 44 and 45 are located in the left and right middle portions. It is formed by connecting a pair of vertical reinforcing plates (plate members) 46.

The upper body 42 is formed in the shape of a cockscomb. The upper body 42 is connected to the rear connecting part 3R of the top link 3 through a pin at the front upper part, and the concave upper connecting part 7 is formed at the rear part. The upper connecting portion 7 engages the upper engaging portion 10 of the working machine 9. A pin 16a projects outward from a portion of the lower body 43 projecting forward and downward, and is connected to a rear connecting portion 4R of the lower link 4 to form a rear connecting point 1 of the lower link 4.
6 is formed at a rear portion of the lower connecting portion 8 having a rearwardly open concave shape.
Are formed in a pair at the top and bottom, and the two lower connecting portions 8A,
8B, the lower engaging portion 11 of the working machine 9 is selectively engaged and disengageable, and two types of working machines 9 having different distances from the upper engaging portion 10 to the lower engaging portion 11 are shown. Are connected on the basis of the upper connection portion 7. Although the lower connecting portions 8A and 8B are displaced only in the vertical direction, they may also be displaced in the front-rear direction.

As shown in FIGS. 2 and 3, a lock member 48 is rotatably supported on the lower body 43 via a horizontal shaft 47. A rear portion of the lock member 48 has a pair of upper and lower members. It has a lock recess, and the lower connecting portion 8A, 8
B can also be engaged with the lower engaging portion 11 engaged with B, and the engagement prevents the lower engaging portion 11 from being detached from the lower connecting portions 8A, 8B.

The lock member 48 is urged by a coil spring 49 in a direction in which it engages with the lower engagement portion 11, and the front portion thereof is connected to the mountain-shaped link 51 of the release means 50. The release means 50 is a bracket 5 fixed to the upper reinforcing member 44.
An arm 53 is pivotally supported by the arm 2 and a link 5
1 is penetrated so as to be relatively rotatable, and an operation lever 54 is fixed to the arm 53. By rotating the operation lever 54 from the solid line state in FIG. , And the lock member 48 is rotated clockwise to release the engagement with the lower engagement portion 11.

In FIG. 1, the PTO shaft 12 and the PIC shaft 1
3 is interlocked with a joint shaft 14, and the joint shaft 14 has a telescopic shaft at an intermediate portion, and a PTO
On the side connected to the shaft 12, there is provided a conformal universal joint (constant universal joint) 58 composed of two sets of hook type joints.
On the side connected to the C-axis 13, there is provided a universal joint 59 comprising a pair of hook-type joints. It should be noted that the conformal universal joint 58 may be employed also on the PIC shaft 13 side.

The PIC shaft 1 is provided at the rear end of the joint shaft 14.
3 and a yoke 60 fitted and connected to the yoke 60.
Are supported by the holder 15. Holder 15 is connected frame 6
Are supported by a mounting body 61 fixed to the left and right vertical reinforcing members 46. Each of the right and left attachment bodies 61 is detachably attached to the vertical reinforcing member 46 via a bolt 62 and is vertically and / or vertically adjustable.

The holder 15 is connected to the yoke 15 via a bearing.
63, which is rotatably supported around this axis, a U-shaped holder 64, which is fixed to the back surface of the cylinder 63, and pins fixed to the left and right walls of the holder 64. And a pair of left and right shaft portions 65 formed. The shaft 65 is displaced rearward from the center of the cylindrical body 63 in the axial direction, and the holder 15 is pivotally supported by the mounting body 61 via the shaft 65. The holding member 64 is provided with a positioning member 66 protruding in a radially outward direction, and this positioning member 66 can be brought into contact with a stopper 67 provided on the mounting body 61.

The holder 15 can swing about the shaft 65, and can be held in a position in which the positioning member 66 abuts against the stopper 67. The positioning member 66 and the stopper 67 control the yoke 15 in position. The posture control means 24 performs the operation. That is, the holding tool 15 is
In the state prior to fitting, the positioning member 66 abuts against the stopper 67 and serves to make the axis of the yoke 60 and the axis of the PIC shaft 13 substantially concentric.
When fitted to the IC shaft 13, the positioning member 66 is separated from the stopper 67.

The holder 15 has a shaft portion 65 displaced downward from the vertical center of the mounting body 61 and can be mounted upside down on the connecting frame 6. The vertical position and / or the front-back position of the yoke 60 can be changed. Next, the work implement mounting operation according to the first embodiment will be described.

1 and 2, a connecting frame 6 is connected to the tractor body 2 via a three-point link mechanism 5, and the main frame 41 is arranged so as to be substantially vertical or inclined forward. The lock member 48 is released by abutting the stopper 67 and operating the operation lever 54. In this state, the tractor body 2 moves backward with respect to the work machine 9 placed on the ground. The upper connecting portion 7 of the connecting frame 6 is engaged with the upper engaging portion 10 of the working machine 9, and the lifting / lowering device 27 is operated to raise the connecting frame 6 to lift the working machine 9, thereby the working machine 9 Moves slightly forward, so that one of the upper and lower lower connecting portions 8A and 8B is engaged with the lower engaging portion 11, and the operation lever 54 is operated in reverse to lock the lower engaging portion 11 with the lock member 48.

At substantially the same time when the lower engaging portion 11 engages with the lower connecting portion 8, the PIC shaft 13 is attached to the yoke 60 in the holder 15.
Is inserted, and the PIC shaft 13 is completely connected to the joint shaft 14 when the lower engaging portion 11 is prevented from coming off by the lock member 48. When the work machine 9 and the work machine 9 having different distances from the upper engagement section 10 to the lower engagement section 11 are mounted on the connection frame 6, the same operation is performed, and the lower engagement section 11 is engaged. The lower connecting portions 8A and 8B are different, and the vertical position (front and rear) of the holder 15 is also adjusted as necessary.

FIG. 6 shows a second embodiment of the present invention. The lower connecting portion 8 formed on the lower body 43 is different from the first embodiment. The lower connecting portion 8 has an upper lower connecting portion 8A formed on the lower body 43 and a lower lower connecting portion 8B formed on the adjusting body 70 fixed to the lower body 43. The adjusting body 70 is fixed to the lower body 43 via a bolt 70a, and can be adjusted vertically by selecting a screw hole of the lower body 43.

Accordingly, the lower connecting portion 8A of the two or more lower connecting portions 8 is fixed in position, the position of the other lower connecting portion 8B is freely changeable, and the upper connecting portion 8 is adjusted based on the position of the upper connecting portion 7. Many types of working machines 9 having slightly different distances from the joint portion 10 to the lower engagement portion 11 can be connected. The lower lower connecting portion 8B is fixed in position, and the upper lower connecting portion 8A is
And the upper and lower positions can be freely changed, or the lower connecting portion 8 on the fixed side may be formed at a plurality of locations. The position of the adjusting body 70 can be adjusted in the front and rear.

FIG. 7 shows a third embodiment of the present invention. The connecting frame 6 of the third embodiment includes a holding member 15.
Are unchanged, and the upper connecting portion 7 is formed as a pair of upper and lower portions like the lower connecting portion 8. The holder 15 is substantially the same as that shown in FIGS. 4 and 5, but the shaft 65 of the holder 64 is directly pivotally supported by the vertical reinforcement 46, or the mounting body 61 is attached to the vertical reinforcement 46. The position of the work machine 9 to be connected is fixed so that the position cannot be adjusted, and the position of the work machine 9 to be connected is set based on the PIC shaft 13.

The working machine 9 that can be connected to the connection frame 6 is
The distance from the IC shaft 13 to the upper engaging portion 10 and the lower engaging portion 11 is from the holder 15 to the upper lower connecting portion 8A and the lower upper connecting portion 7A, and from the holder 15 to the lower lower portion. One from the connecting part 8B and the upper upper connecting part 7B, one from the holder 15 to the upper lower connecting part 8A and the upper upper connecting part 7B, one from the holder 15 to the lower lower connecting part 8B and the lower one It is up to the upper connecting portion 7A.

In the connecting frame 6 of the third embodiment, one of the upper connecting portion 7 and the lower connecting portion 8 may be formed at two places, and the other may be formed at one place. More than two places may be formed. FIG. 8 shows a fourth embodiment of the present invention, which is different from the third embodiment in the upper connecting portion 7 on the upper side.
B is different. The upper connecting portion 7B is formed by an adjusting body 71 which is attached to the upper body 42 via a bolt 71a so as to be able to adjust the vertical position (and / or the front and rear), and a distance from the holder 15 to the upper connecting portion 7B. Can be changed.

Therefore, as compared with the third embodiment, it is possible to connect various types of working machines 9 having slightly different distances from the PIC shaft 13 to the upper engaging portion 10. The upper connecting portion 7B on the upper side may be fixed in position, and the upper connecting portion 7A on the lower side may be freely changed in the vertical (and / or front and rear) position, or the fixed side may be formed at a plurality of locations.

FIG. 9 shows a fifth embodiment of the present invention. In the fifth embodiment, the connecting frame 6 includes a lower connecting portion 8.
Is a reference point in only one place, and the upper connecting part 7 is provided in two places as in the third embodiment, and the upper and lower upper connecting parts 7
A and 7B are fixed, and the holder 15 is substantially the same as that shown in FIGS. Therefore, based on the position of the lower connecting portion 8 in the connecting frame 6,
Two types of work machines 9 having different distances from the upper engaging portion 10 to the lower engaging portion 11 can be connected to two upper connecting portions 7A and 7B having different distances.

The lower side (second) of a distance different from the distance from the two upper connecting portions 7A and 7B to the lower connecting portion 8A.
It is also possible to provide a lower connecting portion so that four types of working machines 9 having different distances from the upper engaging portion 10 to the lower engaging portion 11 can be connected. FIG. 10 shows a sixth embodiment of the present invention. In the sixth embodiment, the lower connecting portion 8 serves as a reference point only at one place similarly to the known technology, and the upper connecting portion 7 Similarly to the fourth embodiment, the upper connection of the lower upper connection portion 7A with the position fixed and the adjustment body 71 attached to the upper body 42 via the bolt 71a so as to be capable of adjusting the vertical (and / or front and rear) position. 7B.

Therefore, the PIC axis 1
Working machine 9 whose distance from 3 to upper engaging portion 10 is slightly different
Can be connected in various types. Note that the upper upper connecting portion 7B may be fixed in position, and the lower upper connecting portion 7A may be freely changed in vertical (and / or front and rear) positions. FIGS. 11 and 12 show a seventh embodiment of the present invention. The connection frame 6 of the seventh embodiment has a lower connection portion 8 in only one place as in the case of the sixth embodiment. The working machine 9 is connected with the lower connecting portion 8 as a reference, and the lower connecting portion 8 and the rear connecting point 16 of the lower link 4 are located substantially concentrically.

The lower link pin 16a forming the connection point 16 is fixed to a base member 72.
2 is a lower body 43 or a main frame 41 forming the lower connecting portion 8.
And a lower engaging portion 11 that is engaged with the lower connecting portion 8.
It is arranged outside the lower connecting portion 8 so as not to interfere with the lower connecting portion 8. In the case of the seventh embodiment, the holder 15 is attached so that the vertical position can be changed, and the upper connecting portion 7 is the same as that of the third or fourth embodiment.
A plurality of working machines 9 having different distances to the shaft 13 and the upper engaging portion 10 can be connected.

FIGS. 13 and 14 show an eighth embodiment of the present invention, in which a connection point 16 of the left and right lower links 4 and a left and right lower connection portion 8 are freely adjustable in a left and right space. Main frame 41
The left and right lower portions extend to a position where they are connected to the lower reinforcing member 45. A link 51 is pivotally supported by the left and right lower portions, and a screw shaft 73 is rotatably supported.

The lower body 43 forming the lower connecting portion 8 is separated from the main frame 41, and the end of the link 51 is inserted through the lower body 43, so that the lock member 48 and the key, spline or serration are formed. The lower body 43 is slidably connected in the left-right direction and slidably integrally.
The lower link pin 16 a forming the connection point 16 is attached to the lower part of the lower body 43.

The left and right lower ends 43 of the screw shaft 73 move in opposite directions while being prevented from rotating by the link 51 when rotated. The connecting portion 8 is moved in the left-right expanding / contracting direction, and even if the intervals between the left and right lower engaging portions 11 are different in the plurality of working machines 9, stepless adjustment is performed so that the lower engaging portions 11 can be normally engaged. it can.

The lower body 43 is provided with only one of the lower connecting portion 8 and the lower link pin 16a, and the other is connected to the main frame 41.
And only the one provided on the lower body 43 may be adjusted in the left-right position. That is, in the eighth embodiment, the connection points 16 of the left and right lower links 4 and / or the left and right lower connection parts 8 are freely adjustable in the left and right distance. FIG.
Shows a ninth embodiment of the present invention, and similarly to the eighth embodiment, the connection points 16 of the left and right lower links 4 and the left and right lower connection portions 8 can be adjusted in the left-right space.

The main frame 41, the upper reinforcing member 44, and the lower reinforcing member 45 are integrally molded or separately formed and fixed to each other, and a pair of left and right supporting members are provided across the upper reinforcing member 44 and the lower reinforcing member 45. A member 74 is attached so that the left and right positions can be adjusted. The left and right support members 74R, 74L are provided with a mounting portion 76 vertically protruding from the main portion 75, connecting portions 77L, 77R protruding inwardly from the main portion 75, and a lower connection vertically protruding from the outer end of the main portion 75. And a lower link pin mounting portion 78 and the like.

The upper and lower ends of the mounting portion 76 have bolts 7.
9, the upper and lower reinforcing members 44 and 45 have a plurality of screw holes in the left and right direction, and the left and right mounting positions of the mounting portion 76 can be changed stepwise. I have. The connecting portions 77L and 77R of the left and right support members 74R and 74L are nested, and penetrate the bolts 80 at the expanded and contracted positions to connect and fix the connecting portions 77L and 77R.

Therefore, when the distance between the left and right support members 74R and 74L is changed, the connection points 16 of the left and right lower links 4 and the lower left and right connection portions 8 are stepwise changed in the left and right expansion and contraction directions.
Even if the intervals between the left and right lower engaging portions 11 are different between the plurality of working machines 9, stepwise adjustment can be performed so that the lower engaging portions 11 can be normally engaged. In addition, only one of the lower connecting portion 8 and the lower link pin 16a is provided on the support member 74, and the other is provided on the main frame 41, and only the member provided on the support member 74 is adjusted in the left-right position. Is also good. The lower link pins 16a are provided in a pair on the left and right from the lower link pin mounting portion 78, but only one of them may be provided.

FIG. 16 shows a tenth embodiment of the present invention, in which two connection points 16 of the left and right lower links 4 and two left and right lower connection parts 8 are provided. The two left and right lower portions of the main frame 41 are protruded outward in the left and right directions to provide two sets of lower bodies 43, the links 51 penetrate the both lower bodies 43, and two lock members 48 are provided. Left and right lower link pins 1
6a is protruded.

Therefore, the working frame 9 having a wide left and right lower connecting portion 8 and the connecting point 16 and the working machine 9 having a narrow connecting point 16 can be connected to the connecting frame 6. In addition, even if there are two types of working machines 9, the lower link pins 16a may be shared by one set. According to the above-described first embodiment of the present invention, two or more lower connecting portions 8 having different distances from the upper connecting portion 7 are provided based on the position of the upper connecting portion 7 in the connecting frame 6. Therefore, two or more types of working machines 9 having different distances from the upper engaging portion 10 to the lower engaging portion 11 can be connected with respect to the upper engaging portion 10.

According to the second embodiment, one of the two or more lower connecting portions 8 is fixed in position and the other is provided so as to be changeable in position. , Two or more types of working machines 9 having different distances from the upper engaging portion 10 to the lower engaging portion 11, in particular, the working machines 9 having slightly different distances can be connected. According to the third embodiment, the upper connecting portion 7 and / or the lower connecting portion 8 are provided at two or more locations different in distance from the holder 15 based on the position of the holder 15 in the connecting frame 6. Therefore, two or more types of working machines 9 having different distances from the PIC shaft 13 to the upper engagement portion 10 and / or the lower engagement portion 11 can be connected with respect to the PIC shaft 13.

According to the fourth embodiment, one or more of the two or more upper connecting portions 7 and / or lower connecting portions 8 are fixed in position, and the other is provided so as to be changeable in position. Therefore, based on the PIC shaft 13, two different distances from the PIC shaft 13 to the upper engagement portion 10 and / or the lower engagement portion 11 are provided.
It is possible to connect more than two types of working machines 9, particularly working machines 9 whose distances are slightly different.

According to the fifth embodiment, the upper connecting portion 7 is located at two or more positions different in distance from the lower connecting portion 8 with respect to the position of the lower connecting portion 8 in the connecting frame 6. The lower connecting portion 8 is provided with reference to the lower connecting portion 8.
It is possible to reliably and stably connect two or more types of working machines 9 having different distances from the working machine 9. According to the sixth embodiment, based on the position of the lower connecting portion 8 in the connecting frame 6,
The upper connecting portion 7 is provided at two or more positions different in distance from the lower connecting portion 8, one of the two or more upper connecting portions 7 is fixed in position, and the other is provided in a freely changeable position. Therefore, in addition to two or more types of working machines 9 having different distances from the upper engaging portion 10 to the lower engaging portion 11 based on the lower engaging portion 11, The working machines 9 whose distances are slightly different can be connected.

According to the seventh embodiment, the connecting frame 6
The upper connecting portion 7 is provided at two or more positions different in distance from the lower connecting portion 8 with respect to the position of the lower connecting portion 8 in the above, and the lower connecting portion 8 and the lower link 4 in the connecting frame 6 are connected. Since the point 16 and the point 16 are arranged substantially concentrically, two types having different distances from the upper engaging part 10 to the lower engaging part 11 based on the connecting point 16 of the lower engaging part 11 and the lower link 4 are used. The above working machines 9 can be connected.

According to the eighth embodiment, the connecting frame 6
Since the connecting point 16 and / or the lower left and right connecting part 8 of the left and right lower link 4 is adjustable in a stepless manner, the connecting point 16 and / or the lower left and right connecting part 8 of the left and right lower link 4 is enlarged and reduced. The distance between the left and right connection points 16 can be slightly different, and / or the working machine 9 with a slightly different distance between the left and right lower engagement portions 11 can be connected.

According to the ninth embodiment, the connecting frame 6
The left and right lower link 4 connection point 16 and / or the left and right lower connection part 8 are adjusted in a stepwise manner so that the connection point 16 and / or the left and right lower connection part 8 of the left and right lower link 4 can be enlarged or reduced. The distance between the left and right connecting points 16 can be different, and / or the working machines 9 having different distances between the left and right lower engaging portions 11 can be connected.

According to the tenth embodiment, the connecting frame 16 has a plurality of sets of connecting points 16 of the left and right lower links 4 and / or lower right and left connecting parts 8 at different left and right intervals. The connection points 16 of the lower link 4 and / or the left and right lower connection parts 8 can be stepwise enlarged and reduced to make the distance between the left and right connection points 16 different and / or the distance between the left and right lower engagement parts 11 different. The work machine 9 can be connected.

Further, according to the first embodiment, since the holder 15 for holding the joint shaft 14 is provided on the connecting frame 6 so as to be vertically and / or vertically movable, the working machine 9 is connected to the upper side. When the PIC shaft 13 is connected to the connection frame 6 with reference to the position of the portion 7 or the lower connection portion 8, the joint shaft 14 is properly held by the holder 15 even if the vertical and / or front-back positions of the PIC shaft 13 are changed. Can hold.

The present invention is not limited to the above embodiment, but can be variously modified. For example, in the working machine coupling device, the joint shaft 14 is connected to the PIC shaft 13
May be artificially fitted to the first case.
In the second, fifth, and tenth embodiments, the holder 15 becomes unnecessary.

[0064]

According to the present invention described in detail above, two or more types of reference are made based on the position of the upper connecting portion 7, the position of the holder 15, or the lower connecting portion 8. The working machine 9 or the working machines 9 with slightly different distances can be connected, and the lower connecting portion 8 and the connecting point 16 of the lower link 4 can be concentric with each other to connect two or more types of working machines 9, and the upper connecting portion 7 can be connected. Alternatively, when there are two or more lower connecting portions 8, at least one is fixed, so that the working machine 9 to be mainly mounted can be more reliably and stably connected.

Further, the connection of the working machine 9 can be expanded or contracted steplessly or stepwise at the connection points 16 of the left and right lower links 4 and / or the lower left and right connection parts 8.
The joint shaft 14 can be supported even when the vertical and / or front / rear position of the joint shaft 14 is changed.

[Brief description of the drawings]

FIG. 1 is a cross-sectional side view showing a first embodiment of the present invention.

FIG. 2 is a side view of a connection frame.

FIG. 3 is a front view of a connection frame.

FIG. 4 is a sectional side view of the holder.

FIG. 5 is a rear view of the holder.

FIG. 6 is a side view showing a second embodiment.

FIG. 7 is a cross-sectional side view showing a third embodiment.

FIG. 8 is a side view showing a fourth embodiment.

FIG. 9 is a cross-sectional side view showing a fifth embodiment.

FIG. 10 is a front view showing a sixth embodiment.

FIG. 11 is a front view showing a seventh embodiment.

FIG. 12 is a side view showing the seventh embodiment.

FIG. 13 is a front view showing an eighth embodiment.

FIG. 14 is a front view showing the eighth embodiment.

FIG. 15 is a front view showing a ninth embodiment.

FIG. 16 is a front view showing a tenth embodiment.

[Explanation of symbols]

 2 Tractor body 3 Top link 4 Lower link 5 Three-point link mechanism 6 Connecting frame 7 Upper connecting part 8 Lower connecting part 9 Work implement 10 Upper engaging part 11 Lower engaging part 12 PTO shaft 13 PIC shaft 14 Joint shaft 15 Holder 16 connection points

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Tatsuya Maeyama 64 Ishizukitamachi, Sakai City, Osaka Prefecture Inside Kubota Sakai Factory (72) Inventor Shunji 64 Ishizukitamachi, Sakai City, Osaka Prefecture Kubota Sakai Manufacturing Co., Ltd. In-house (72) Inventor Michio Tai 64 Ishizukita-cho, Sakai City, Osaka, Japan Kubota Sakai Works, Inc. (72) Inventor Hirofumi Sakane 64 Ishizu-Kitamachi, Sakai City, Osaka Prefecture, Kubota Sakai Works, Inc. (72) Invention Person Seiichi Okamura 64 Ishizu-Kitacho, Sakai City, Osaka Prefecture, Japan (72) Inventor Ippei Yamaji 64 Ishizu-Kitamachi, Sakai City, Osaka Prefecture Inside Kubota Sakai Plant, Inc. (72) Inventor Takashi Uchida Sakai, Osaka 64, Ishizu-Kitacho, Ishizu-shi Inside Kubota Sakai Factory (72) Inventor Takahito Kurohara 64, Ishizu-Kitacho, Sakai-shi, Osaka Pref. House (72) inventor Kazumi Umeki Sakai, Osaka Prefecture Ishizukita-cho, 64 address, Ltd. Kubota Sakai manufacturing plant (72) inventor Takaaki Ono Sakai, Osaka Prefecture Ishizukita-cho, 64 address, Ltd. Kubota Sakai manufacturing plant

Claims (10)

[Claims] 1. A connecting frame (6) is connected to a tractor body (2) via a three-point link mechanism (5) having a top link (3) and a pair of left and right lower links (4). 6), an upper connecting portion (7) and a pair of left and right lower connecting portions (8) are formed to form an upper engaging portion (10) and a pair of left and right lower engaging portions (11) of the working machine (9), respectively. And the PTO shaft (12) of the tractor body (2) and the P
An IC shaft (13) is connected by a joint shaft (14), and two or more types of working machines (9) having different distances from the upper engaging portion (10) to the lower engaging portion (11) are connected. In order to achieve this, two or more lower connecting portions (8) having different distances from the upper connecting portion (7) are provided with reference to the position of the upper connecting portion (7) in the connecting frame (6). Characteristic tractor working machine coupling device. 2. The tractor according to claim 1, wherein one of the two or more lower connecting portions (8) is fixed in position and the other is provided so as to be changeable in position. Work machine coupling device. 3. A connecting frame (6) is connected to the tractor body (2) via a three-point link mechanism (5) having a top link (3) and a pair of left and right lower links (4). 6), an upper connecting portion (7) and a pair of left and right lower connecting portions (8) are formed to form an upper engaging portion (10) and a pair of left and right lower engaging portions (11) of the working machine (9), respectively. And the PTO shaft (12) of the tractor body (2) and the P
An IC shaft (13) is connected with a joint shaft (14), and a holder (15) for holding the joint shaft (14) is provided on the connection frame (6). In order to connect two or more types of working machines (9) having different distances to the joining portion (10) and / or the lower engaging portion (11), the position of the holding tool (15) in the connecting frame (6) is used as a reference. A tractor working machine connecting device, wherein an upper connecting portion (7) and / or a lower connecting portion (8) are provided at two or more places at different distances from the holder (15). 4. The two or more upper connecting portions (7) and / or
4. The tractor working machine connecting device according to claim 3, wherein one of the lower connecting portions (8) is fixed in position and the other is provided so as to be changeable in position. 5. 5. A connecting frame (6) is connected to the tractor body (2) via a three-point link mechanism (5) having a top link (3) and a pair of left and right lower links (4). 6), an upper connecting portion (7) and a pair of left and right lower connecting portions (8) are formed to form an upper engaging portion (10) and a pair of left and right lower engaging portions (11) of the working machine (9), respectively. And the PTO shaft (12) of the tractor body (2) and the P
An IC shaft (13) is connected by a joint shaft (14), and two or more types of working machines (9) having different distances from the upper engaging portion (10) to the lower engaging portion (11) are connected. For this purpose, the upper connecting portion (7) is provided at two or more positions different in distance from the lower connecting portion (8) with reference to the position of the lower connecting portion (8) in the connecting frame (6). A tractor working machine coupling device. 6. The tractor according to claim 5, wherein one of the two or more upper connecting portions (7) is fixed in position and the other is provided so as to be changeable in position. Work machine coupling device. 7. A connecting frame (6) is connected to the tractor body (2) via a three-point link mechanism (5) having a top link (3) and a pair of left and right lower links (4). 6), an upper connecting portion (7) and a pair of left and right lower connecting portions (8) are formed to form an upper engaging portion (10) and a pair of left and right lower engaging portions (11) of the working machine (9), respectively. And the PTO shaft (12) of the tractor body (2) and the P
An IC shaft (13) is connected by a joint shaft (14), and two or more types of working machines (9) having different distances from the upper engaging portion (10) to the lower engaging portion (11) are connected. In order to provide an upper connecting portion (7) at two or more positions different in distance from the lower connecting portion (8) based on the position of the lower connecting portion (8) in the connecting frame (6), and A lower link (8) of the connecting frame (6) and a connecting point (16) of the lower link (4) are arranged substantially concentrically. 8. A connection point (16) of the left and right lower links (4) and / or a left and right lower connection part (8) of the connection frame (6) is adjustable in a left and right space. A tractor working machine coupling device according to any one of claims 1 to 7. 9. A plurality of sets of connecting points (16) and / or lower left and right connecting parts (8) of the left and right lower links (4) in the connecting frame (6) with different left and right intervals. The tractor working machine coupling device according to any one of claims 1 to 7. 10. A joint shaft (1) is attached to said connecting frame (6).
The holding tool (15) for holding 4) is provided so as to be able to change the vertical and / or front and rear positions freely.
8. The tractor working machine coupling device according to any one of 2, 5 to 7.