JP2002095308A - Implement connecting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the dangerous approach of plural implements to a tractor when attaching to the rear part of the tractor and vertically moving the implements. SOLUTION: The 1st implement 21 and the 2nd implement 22 are liftably attached to the tractor 20. In the case of lifting the 1st and the 2nd implements 21, 22, the 2nd implement 22 is parallelly lifted by a bridging rod 52.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a working machine coupling device, and more particularly, to a first working machine and a second working machine disposed at the back and front of a tractor so as to be able to move up and down with respect to the tractor. The present invention relates to a connecting device to be mounted.

[0002]

2. Description of the Related Art As illustrated in FIG. 8, a first work machine 2 (in the figure, a rotary cultivator is shown and is a main work machine) and a second work machine 3 (FIG. In this example, a cultivator attached to the rotary cultivator is shown (attached to the cultivator), which is a sub-working machine), and the working machines 2 and 3 are mounted on the tractor 1 by a hydraulic device 5 having left and right lift arms 4.
A connecting device which is mounted so as to be able to move up and down via a three-point link hitch 6 is known. The working mode of the working machine mounted by this connecting device is such that when performing rotary plowing and cultivation work (ridge work), a tool bar (support frame) 8 extending from the rotary machine frame 7 is provided with a support (support rod). 9 is attached upside down, and the cultivator 3 provided at the lower part of the support 9 is
It is performed by grounding in a state where it is positioned at the notch formed in the cultivation cover 10.

When only the rotary tillage is performed or the vehicle runs on the road, the upside-down support portion 9A of the column 9 is turned upside down (including rotation or upside-down replacement), and as shown in FIG. Is turned 180 degrees upward and supported.

[0004]

According to the conventional connecting device shown in FIG. 8, when the first working machine 2 is lifted by the hydraulic pressure of the hydraulic device 5 and turns on a headland or travels on a road, the second working machine is used. 3 is also lifted by the same amount as the first working machine 2, the second working machine 3 may be too close to the rear surface of the frame 11 such as the cabin and the ropes provided in the tractor 1 and interfere with each other, Therefore, there is a problem that the lift amount is restricted. In particular, when the special three-point link hitch 6 shown in the figure is adopted, the above-mentioned problem becomes remarkable because the rear is lifted up in a tail-like manner, which is a large neck in the case of a small tractor.

For this reason, the toolbar 8 is extended backward,
When the work machine is lifted by moving the support portion 9A backward (sludge), the second work machine 3 can be prevented from approaching the tractor 1 by lifting the second work machine 3 away from the tractor 1 as much as possible. However, in this case, in the working posture, the second work machine 3 greatly overhangs rearward, and the front-rear balance is deteriorated, which causes a reduction in work accuracy. In addition, the reach when lifting is increased, so that the lifting force ( Hydraulic pressure) also increases.

Therefore, the present invention provides a first work machine by arranging a first work machine and a second work machine behind and behind a tractor and lifting or lowering the second work machine when lifting the work machine. It is an object of the present invention to provide a working machine coupling device that solves the above-described problems (including new problems) of the related art by differentiating the lifting and lowering movements of the machine and the second working machine.

[0007]

SUMMARY OF THE INVENTION The present invention relates to a tractor 20.
Work machine 21 and second work machine 2 arranged in front and behind
In order to achieve the above-mentioned object, the following technical measures are taken in the connecting device for mounting the second and the second tractors 20 on the tractor 20 so as to be able to move up and down. That is, the working machine connecting device according to claim 1 is provided with a check means 52 that makes the first working machine 21 and the second working machine 22 move up and down differently, and In the work connecting device according to claim 2, the lifting and lowering movement of the working machines 21 and 22 in claim 1 is such that the first working machine 21 is lifted and lowered by an arc movement with the front side as a fulcrum, and the second working machine 22 It is characterized by being moved up and down in a substantially parallel motion accompanying the circular motion.

By adopting such a configuration, when the first working machine 21 and the second working machine 22 are lifted, the second working machine 21
The work machine 22 is restrained (restricted) from approaching the tractor 20 rapidly by the restraint means (stretching means) 52.
The lift amount of the hydraulic device (working machine raising / lowering device) 25 is not subject to the rules. When the second working machine 22 is a fertilizer or a seeder, it is moved up and down in a substantially parallel motion, so that the fertilizer ( This also eliminates the spilling of particles or liquid) or seeds, and further eliminates the need to shift the mounting device of the second working machine 22 rearward, thereby reducing the reach when lifting (lifting) without increasing the lifting force. (Hydraulic pressure) does not increase.

Here, the first working machine and the second working machine may be any as long as they are arranged in front of and behind and can be moved up and down with them.
It is not limited to two working machines, but may be two or more working machines. Furthermore, in the above-mentioned claim 1 or 2, the first work machine 21 is a rotary for performing tillage work, and is mounted on the tractor 20 by means of a special three-point link 23 so as to be lifted up and down in a butt position. It is recommended that the machine 22 is a cultivator attached to the rotary work, and is mounted so as to be raised and lowered substantially in parallel (claim 3).

Here, the first working machine 21 may be a working machine other than a rotary, for example, a plow, and the working machine mounting means may be a direct mounting type (standard three-point link, two-point link other than the special three-point link 23).
Point work, etc.), and the second working machine 22 may be anything attached to (attached to) the first working machine 21, such as a cultivator, a fertilizer, a seeder, or the like. However, as described in claim 3, when the special three-point link 23 is employed as the work implement mounting means (work implement attachment device), even if the first work implement 21 is lifted up, it is possible to lift the work implement 21 upward. Does not suddenly approach the tractor 20, especially when the tractor 20 is small.

The parallel link R for moving up and down the second working machine 22 has one end pivotally connected to the upper link point B and the other end connected to the second working machine 22.
It is recommended that a restraint means 52 be provided with a restraint rod 52A that is pivotally attached to the control means (claim 4). Here, it is possible to employ a telescopic fluid cylinder instead of the control rod 52A. However, if the control rod 52A is employed, the restriction (lifting of the tractor 2
0 and the second working machine 22), and the pivoting portions D and E at both ends (one end and the other end) of the restraint rod 52A can be detachably mounted, for example, on the toolbar 3
It is also easy to keep them at zero.

Further, as described above, when the first working machine 21 is lifted, the second working machine 22 is positioned substantially above the first working machine 21 as described above.
It is recommended that the two work machines 21 and 22 be lifted so as to overlap each other before and after (claim 5). By adopting such a configuration, when the tractor 20 travels on the road with the first work implement 21 and the second work implement 22 lifted, the traveling balance (the front-rear balance between the tractor and the work implement) is disrupted. This can prevent running and ensure running stability.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows the entire configuration of a work implement coupling device according to the present invention. A first work implement 21 exemplified by a rotary cultivator and a rotary work implement are attached (attached) behind a tractor 20 exemplified by a wheel. A second work machine 22 exemplified by a cultivator is arranged in front and back, and is connected to a tractor 20, a first work machine 21 and a directly mounted work machine mounting device 23 exemplified by a special three-point link so as to be able to move up and down freely. The left and right lift arms 26 of a hydraulic device (working machine lifting device) 25 mounted on the vehicle body 24 of the tractor 20 and the middle of the left and right lower links 27 are pivotally connected by left and right lift rods 28, respectively. And the first working machine 2
1 is raised and lowered by hydraulic pressure, and a toolbar (work implement mounting frame) 30 is protruded rearward from the machine casing 29 of the first work implement 21, and the second work implement is utilized by using a hitch metal fitting at the rear end of the toolbar 30. 22, the second working machine 2
Numeral 2 is movable up and down along with the up and down operation of the first work machine 21.

The tractor 20 is provided with a cabin 20A that surrounds (surrounds) the driver's seat. Instead of the cabin 20A, an upright prop may be provided. Alternatively, the cabin 20A may be provided with a cabin and a drop prop. The tractor may be an unmounted tractor or a tracked (crawler) tractor. The special three-point link 23 is the left and right lower link 2
7 and a central top link 31, and an extension bracket 33 is protruded rearward from a mounting table 32 attached to the upper rear surface of the tractor body 24.
By pivotally connecting the upper link point of the top link 31 to 3, the first working machine 21 is configured to move up and down in a manner ascending. However, instead of the special three-point link 23, a standard (Europe and US) three-point link using the upper link point of the top link 31 as the mounting base 32 or a two-point link may be used. Absent.

When the first working machine 21 is a rotary cultivator (also referred to as a rotary cultivator), it is mainly configured with a rotary cultivator 34 and a cultivation cover device 35 for covering the cultivator 34. Is configured to be rotatable by the power of a PTO shaft 36 provided in the tractor 20.
The rotary is exemplified by a side drive type, and FIG.
A transmission case 37 is provided at the center in the left-right direction (tilling width direction) as shown by, and this transmission case 37 has a PIC shaft 37A protruding forward (toward the tractor side).
By connecting the IC shaft 37A and the PTO shaft 36 with a transmission shaft 38 having joints at both ends, a transmission body such as a bevel gear in the transmission case 37 is driven.

Support arms 39 project outward from the left and right sides of the transmission case 37, respectively. The support arms 39 have side projections 40 and side plates 41 at the projecting ends. The side transmission case 40 and the side plate 41 are extended downward, and the transmission case 37, the left and right support arms 39, the side transmission case 40, and the side plate 41 are connected to each other.
Thus, a substantially gate-shaped machine casing 29 is assembled in a front view. A cultivation cover device 35 is mounted (supported) on the machine frame 29. The cultivation cover device 35 includes a fixed cover body 42 and the fixed cover body (front cover body) 42.
The main body is composed of a movable cover body (rear cover body) 44 supported at the rear end by a hinge 43 so as to be able to swing up and down, left and right side cover bodies 45, and the like. Are biased in the ground direction and supported by left and right bouncing means 46 interposed therebetween (see FIG. 4).

The assembling means 47 for assembling the tillage cover device 35 to the machine frame 29 will be described with reference to FIG.
As described above, since the machine casing 29 is a gate-shaped assembly, the front and rear stays 48 (in FIG. 5, the side plates 41 and 40) having the mounting holes 48 </ b> A formed in the side transmission case 40 and the side plate 41.
Are omitted, and only the stay of the side transmission case 40 is shown. However, the stay of the side plate 41 has the same configuration. Therefore, the front and rear stays 48 are provided to face each other on the left and right. The tilling cover device 35 is inserted, and the
A and the mounting holes 42B of the end plates (flanges) 42A formed on the left and right sides of the fixed cover body 42 are aligned with each other and directly attached with a bolt fastener 49 (a set by directly overlapping the stay 48 and the end plate 42A). Method) (first example),
A method using a so-called float structure (second example) in which a cylindrical vibration isolating rubber is interposed between the stay 48 and the end plate 42A, and a bolt fastener 49 is inserted into the rubber and assembled. In place of the above, a method (third example) of attaching without a gap by interposing a shim made of sheet metal has been conventionally adopted.

However, in the above-described first example, the gap cannot be filled, and furthermore, since the metal materials are overlapped with each other, vibration and sound insulation cannot be achieved. The second mentioned above
In the example, since it has a float structure, it is excellent in terms of vibration proof (sound proof), but its cost is high, and the gap cannot be adjusted. In the third example described above, clearance adjustment is possible, but vibration and soundproofing cannot be performed. Therefore, in the assembling means 47 shown in FIG. 5, a spacer 50 having a bottle insertion hole 50A serving also as a shim and a vibration-proof rubber is interposed to provide a proper clearance and a vibration-proof (sound-proof) effect. Yes, this spacer 50 is vibration-proof (sound-proof)
In consideration of the effect and durability against screw tightening, a resin or rubber material having a hardness of 70 to 90 degrees is optimal.

FIGS. 3 (1) and 3 (2) show a side cover body 45 in the tilling cover device 35 for preventing soil adhesion. That is, the side cover body 45 is
5A is made of a reinforced resin (PP material containing about 30% glass fiber), and the inner surface (soil-adhered surface) is made of a material having a small sliding friction (easy to slide) in FIG. A plate material 45B is formed by simultaneously and integrally forming a fluororesin with the main body 45A, or a fluororesin, a silicone rubber or the like is coated. In FIG. 3 (2), a plate 45B made of stainless steel is simultaneously formed.

When the first working machine 21 is a rotary and the second working machine 22 is a cultivator (ridge), the tilling cover device 3
5, a notch 44A is formed in the movable cover body 44 as shown in FIG. 4, and a cultivator is set in the notch 44A so that ridge work can be performed immediately after rotary plowing. I have. The cultivator 22A is provided with a support (support rod) 22 on a rear end hitch fitting 30A of the mounting support frame 30.
B is provided so that it can be turned upside down.
The reference numeral 0 is attached to the machine frame 29 by a screw-shaped adjustment rod 51 between itself and the top mast 29A.

When only the rotary tilling is performed or the tractor 20 travels on the road with the working machine directly mounted, the soil cultivator 22A is turned over as shown in FIG. 1 by turning the hitch metal fitting 30A upside down or replacing the support 22B. It is turned upside down and supported. As described above, when the cultivator 22A, that is, the second work machine 22 is supported at a position above the rotary tilling unit 34 and the left and right lift arms 26 of the hydraulic device 25 are lifted, the first work machine 21 is moved to the front side. As described with reference to FIG. 8, when the second work machine 22 is moved up and down around the fulcrum (the lower link point A on the left and right and the upper link point B at the center) in an arc motion and the second work machine 22 moves up and down accompanying this arc motion. Then, the cultivator 22A suddenly approaches the cabin 20A or the like.

Therefore, in the present invention, the first working machine 21
Check means 52 that makes the lifting and lowering motion of the second work machine 22 different from that of the second work machine 22
Here, the second working machine 22 is moved up and down in a substantially parallel movement accompanying the circular motion of the first working machine 21. With reference to FIGS. 1, 2 and 4, the restraint means (which serves as a strut means when the work machine is lifted) 52 will be described. The restraining means 52 is composed of a strut member 52A that projects the second work machine 22 during lifting operation (when lifting) when the work machines 21 and 22 are moved up and down. One end of the rod is pivotally connected E near the upper link point B, and the other end is pivotally connected D to the second work machine 22 so as to be freely rotatable. The pivots E and D are detachable.

Referring to FIG. 2, the left and right lift rods 2
A mounting bracket 53 is attached to the upper end portion of the bracket 8 so as to be detachable and fixable, and a pivot shaft 54 is detachably inserted into the bracket 53 to form a pivot portion E at one end. On the other hand, as shown in FIG. As shown in the drawing, a support rod (which may be an interval adjuster for a cultivation plate) 55 is attached, and the other end (glasses) of the projecting member 52A is pivotally attached to the left and right ends of the support rod 55 so as to be freely inserted and removed. D
It is doing. Therefore, in the illustrated example, the restraining means 52 is composed of two strut members (bar members) 52A which are parallel to each other and are aligned along the front-rear direction. When the first working machine 21 is lifted, it is accompanied by this. 2nd work machine 2 lifted
2 is that the rod 52A exerts a thrust action through the rotation of the pivoting portions D and E at both ends, and the second working machine 22 is moved up and down in a substantially parallel motion. Thus, the parallel link R is made up of the bar 52A and the support bar 30 and the like.

Further, when the first working machine 21 is lifted, the second working machine 22 is located substantially above the first working machine 21 so that the first and second working machines 21 and 22 overlap each other. By being lifted, the first and second working machines 21 and 2
When the vehicle 2 is lifted and the vehicle is traveling on the road, the work implements 21 and 22 are not greatly rearward from the tractor 20. Therefore, the stability of traveling on the road (the balance between front and rear is small) and the maneuverability (steering) are also improved. is there. Checking means 52 includes two
It is also possible to use a single strut 52A instead of the two struts 52A.

For example, the pivot shaft 54 is erected in the left-right direction (for example, the connecting shaft (pivot shaft) F of the lift arm 26 is set in the left-right direction), and the center portion of the connecting shaft F in the left-right direction (the left and right sides of the tractor 20). In the direction center).
By pivoting E to A, it becomes one strut. Further, the restraining means 52 is provided with one or two struts 52.
A, regardless of whether it is made of A,
May be provided with a connecting shaft (pivot shaft) F on the extension bracket 33 in the left-right direction and pivotally connected to the connecting shaft F. In short, the connecting portion E is coaxial with the upper link point B or in the vicinity thereof. Should be located.

When at least one of the left and right lift rods 28 is constituted by a fluid pressure cylinder, the first working machine 21 can be horizontally controlled. It is desirable to use a ball joint so as not to hinder horizontal control. Furthermore, when the second working machine 22 is the soil cultivator 22A and the rotary plow and the soil cultivation work are performed, the pivot portions D and E are released, and the strut rod 52A can be stored in the support frame 30 or the like in the front-rear direction. In this case, it is preferable that a holder for the rod 52A be attached to the support frame 30.

When the second work machine 22 is a fertilizer / seeder 22C as shown in FIG. 1, a pivoting part D is positioned on this tank part (main body), and fertilizer application and the like are performed from the feeding part 22D. Do. At this time, it is advantageous that the fertilizer can be prevented from being spilled due to the second working machine 22 being moved up and down in a substantially parallel motion. The illustrated first work machine 21 is provided with a ridge cutting device 56 as shown in FIG.

Conventionally, the ridge cutting device 56 has a disk-shaped disc-shaped or shoe-shaped (disk-shaped in the figure) ridge-cutting body 57 which is supported on a side transmission case 4 by a support rod 59 and a bracket 58.
It was fixed to the front side of 0 (supported to be unable to swing). With this fixed type, when the ridge body 57 contacts (collides with) the ridge G, either the ridge body 57 or the ridge G is damaged.
When the ridge G is made of concrete, the damage to the ridge body 57 is remarkable. Therefore, the ridge cutting device 56 shown in FIG.
When the external force F1 acts upon contact between the ridge G and the ridge G,
7 is swinging.

6 and 7 (1) divides the column 59 into upper and lower parts, and joins the divided part 59A so as to rotate about the vertical axis. One of the divided parts 59A is attached to one of the divided parts 59A. A stopper pin 59C is implanted, and the other end of the stopper pin 59C is swingable and is capable of swinging.
B, a coil spring 60 is inserted into the divided portion 59A to support the ridge body 57 in the solid line posture (working posture) shown in FIG. 6, and holds the ridge cutting resistance F2 and the external force F1. When acts, the ridge body 57 can be swung as shown by X in FIG. 6 against the elasticity of the coil spring 60.

In FIG. 7 (2), the upper end of the support column 59 is a cylindrical boss 59D facing in the front-rear direction, and the boss 59D is formed as a divided portion 59A so that the support shaft in the front-rear direction is relatively rotatable. A stopper pin 59C, a receiver 59B and a coil spring 60 are provided so that the ridge body 57 can be swung as indicated by the arrow Y. The above embodiment is an example, and the rotary which is the first working machine 21 may be a center drive, and the first working machine 21 may be a plow. Further, the portal-shaped support frame 30 in a plan view can be adjusted back and forth by a nest structure and can be fixed by inserting and removing a pin.
A is adjustable in length by the screw portion 52B, but may be a nested structure instead of the screw portion 52B and may be adjusted by inserting and removing pins.

[0031]

As described above in detail, according to the present invention, when a plurality of working machines are mounted on a tractor so as to be able to vertically move up and down, it is possible to prevent a sudden approach to the tractor side even when the working machines are lifted. Therefore, the lift amount is not restricted.

[Brief description of the drawings]

FIG. 1 is an overall side view of a working machine coupling device according to the present invention, and also shows an operation state.

FIG. 2 is a side view showing the vicinity of an upper link point which is a main part of FIG.

FIG. 3 is a partial plan view showing two examples of a rotary cover.

FIG. 4 is a plan view showing a main part of FIG. 1;

FIG. 5 is an exploded perspective view of the tillage cover device.

FIG. 6 is a plan view of the ridge cutting device.

FIGS. 7A and 7B show a swing motion means of the ridge cutting device, wherein FIG. 7A is a perspective view of a vertical swing type, and FIG. 7B is a perspective view of a horizontal swing type.

FIG. 8 is an overall side view showing a conventional working machine coupling device.

[Explanation of symbols]

 Reference Signs List 20 tractor 21 first working machine 22 second working machine 23 three-point link 25 hydraulic device 26 lift arm 52 restraining means

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2B034 AA09 BA07 BA10 BC06 BD02 BE03 JA06 JA18 JB01 JB13 2B041 AA01 AB05 AC02 AC03 CA16 CA17 CC02 CC11 2B304 KA20 LA06 LA07 LA18 LB06 LB15 MA02 MB03 PC08 RA11

Claims (5)

[Claims] 1. A connecting device for mounting a first working machine (21) and a second working machine (22) disposed in front and behind a tractor (20) on a tractor (20) so as to be able to move up and down. A work implement coupling device comprising a check means (52) that makes the first work implement (21) and the second work implement (22) move up and down differently. 2. The lifting and lowering movement of the working machine (21) (22)
2. The work implement according to claim 1, wherein the first work implement (21) is moved up and down in a circular motion with the front side as a fulcrum, and the second work implement (22) is moved up and down in a substantially parallel motion accompanying the circular motion. 3. The working machine coupling device as described in the above. 3. A first work machine (21) is a rotary for performing tillage work, mounted on a tractor (20) so as to be raised and lowered by a special three-point link (23), and a second work machine. The work implement coupling device according to claim 1 or 2, wherein (22) is a cultivator attached to the rotary work, and is mounted so as to move up and down substantially in parallel. 4. A parallel link (R) that moves up and down the second work machine (22) has one end pivotally connected to the vicinity of the upper link point (B) and the other end pivotally connected to the second work machine (22). The work implement coupling device according to any one of claims 1 to 3, further comprising a restraint means (52) provided with a restraint rod (52A). 5. When the first working machine (21) is lifted, the second working machine (22) is located substantially above the first working machine (21), and the first and second working machines (21) (22) 5) is lifted so as to overlap the front and rear sides.