JP2002330603A - Apparatus for connecting implement - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus capable of accurately transmitting vertical shaking of a rear cover on the side of a rotary implement to a plowing depth sensor on the side of a tractor and performing plowing depth control. SOLUTION: This apparatus for connecting the implement is obtained by rotatably pivoting a first shaking member for transmitting the movement of the rear cover on the side of the rotary implement so as to be rotatable around a transverse shaft, on the other hand, installing a second shaking member for coming into contact with the shaking member from the front side and transmitting the extent of shaking to the plowing depth sensor on the side of the tractor freely rotatable around the transverse shaft on the side of a three-point hitch mechanism and further providing a stopper for preventing reverse rotation capable of preventing the reverse rotation of the second shaking member in a supporting part for supporting the second shaking member in the apparatus composed by connecting the rotary implement through the three-point hitch mechanism installed in the tractor so as to enable lifting and lowering and transmitting the vertical shaking of the rear cover on the side of the rotary implement to the plowing depth sensor on the side of the tractor so that the rotary implement can automatically be lifted and lowered.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a working machine connecting device for connecting rotary working machines with a three-point link hitch mechanism.

[0002]

BACKGROUND OF THE INVENTION The present applicant has previously filed an application for connecting a rotary tillage device by a three-point link hitch mechanism. In this device, when a first swing member is pivotally attached to a front portion of a rotary work machine, a second swing member is pivotally attached to a three-point link hitch mechanism side, and the work machine is connected by a three-point link hitch mechanism. The two rocking members contact each other back and forth, and the movement of the rear cover on the rotary work machine is transmitted to the cultivation depth sensor on the tractor side to automatically raise and lower the work machine to maintain the set cultivation depth. It is something to do.

[0003]

By the way, in such a device, the movement of the swinging member on the three-point link hitch mechanism side was not regulated at all before the connection between the tractor and the working machine. There is a risk that the worker may unconsciously touch the rocking member or attach mud to the rocking member before connecting the work machine, which may cause the mud to be inverted, and lift the work machine without knowing the reversal. And the first swing member and the second swing member do not overlap each other in the front-rear direction, so that the movement of the rear cover on the rotary working machine side is not accurately transmitted to the cultivation depth sensor on the tractor side. In the worst case, there is a problem that the swinging member on the three-point link hitch side is deformed or damaged.

[0004]

SUMMARY OF THE INVENTION The present invention has been proposed in view of the above-mentioned problems, and has taken the following technical measures. That is, the invention of claim 1 connects the rotary working machine 30 via the three-point link hitch mechanism 14 mounted on the tractor 1 so as to be able to move up and down, and controls the vertical swing of the rear cover 40 of the rotary working machine 30 side. The rotary work machine 30 is configured to be able to automatically move up and down by transmitting the till depth sensor 65 on the side of the rotary shaft.
On the other hand, on the three-point link hitch mechanism 14 side, a second swing which contacts the swing member 50 from the front and transmits the swing amount to the plowing depth sensor 65 on the tractor 1 side. The member 60 is rotatably provided around a horizontal axis 58, and the support portion 57 for supporting the second swing member 60 is provided with an inversion prevention stopper 70 for preventing the second swing member 60 from being inverted. The configuration of the working machine coupling device is as follows.

According to a second aspect of the present invention, a through hole 72 is provided between the supporting portion 57 for supporting the second swinging member 60 and the second swinging member 60 to adjust the positional relationship between the two to an optimum relationship. , 7
3. The work machine coupling device according to claim 1, wherein a third hole is formed.

[0006]

[Function] Rotary work machine 30 placed on a flat place
When the tractor 1 equipped with the three-point link hitch mechanism 14 is moved backward, the three-point link hitch mechanism 1
4 and the mast 1 on the rotary working machine 30 side by the upper engagement portion 19.
Lift 6

When the tractor 1 is further raised by using the hydraulic lifting mechanism, the three-point link hitch mechanism 14 and the rotary work machine 30 are connected, and the PTO shaft 34 on the tractor 1 side is connected.
And the input shaft 32 on the rotary working machine 30 side are also connected via the universal joint 28 at the same time, and the connection is completed.

At this time, the second swinging member 60 supported by the support portion 57 of the three-point link hitch mechanism 14 and the first swinging member 50 of the rotary working machine 30 are in contact with each other in the front-rear direction. Maintain the relationship until the implement is disconnected. Accordingly, the two swing members 50 and 60 simultaneously rotate in accordance with the vertical swing of the rear cover 40, and the movement is transmitted to the tillage depth sensor 65 installed on the tractor 1.

[0009]

Embodiments of the present invention will be described below with reference to the embodiments shown in the drawings. First, a description will be given of the configuration. Reference numeral 1 denotes a conventionally-known tractor, which transmits the rotational power having been shifted to the rear wheels 3 via a transmission (not shown) in a transmission case 2.

A hydraulic cylinder case 5 having a hydraulic cylinder 4 inside is fixed to a rear upper portion of the transmission case 2. The hydraulic cylinder case 5 has lift arms 7, 7.
Can be freely rotated. When hydraulic oil is supplied into the hydraulic cylinder 4, the lift arms 7, 7 rotate upward,
Conversely, when the operating pressure oil is removed, the lift arms 7, 7 descend.
In FIG. 6, reference numeral 8 denotes a top link hitch, 9 denotes a top link, 10 denotes a lower link, and 11 denotes a lift rod. A quick hitch 1 for lifting a working machine is provided on a three-point link 12 including a top link 9 and a lower link 10.
4 is detachably attached.

The quick hitch 14 includes a hook-shaped upper engaging portion 19 for locking a locking pin 17 provided on the top mast 16 on the working machine side from below, and connecting pins 20 and 20 on the rotary working machine side. Lower engaging portions 22 and 22 for locking are provided, and the lower engaging portions 22 and 22 are open at the rear, and the connecting pins 20 and 20 on the working machine side are accommodated in the openings. FIG.
Is a view of the quick hitch 14 viewed from the front side. The main frame portion 23 having a mountain shape is formed of a steel pipe, and the left and right are connected by an intermediate pipe 24 to reinforce the main frame portion 23.

The intermediate pipe 24 has a pair of plate members 26, 26.
A bearing 29 is formed on the plates 26, 26 to support the rear part of the universal joint 28. Bearing 29
Are supported so as to be able to rotate in the front-rear direction by a predetermined angle around shafts 31 provided on the left and right, and a spline hole 33 into which the input shaft 32 of the rotary working machine 30 can be fitted is formed in the center. . Therefore, when the rotary work machine 30 is lifted by the quick hitch 14 and the work machine 30 is assembled, the input shaft 32 of the rotary work machine 30 enters the spline hole 33, and the rotational power of the PTO shaft 34 of the tractor 1 is transferred to the universal joint 28. , Spline hole 33, input shaft 32
Are sequentially transmitted to the rotary working machine 30 side via the 27 is a pin for attaching the lower link 10.

The rotary working machine 30 includes a transmission case 36 for transmitting the power from the input shaft 32 to the tilling shaft 35, a plurality of tilling claws 38 attached to the tilling shaft 35, and a main cover 39 for covering the upper portion of the tilling portion. And a rear cover 40 rotatably attached to the rear of the main cover 39. The vertical swing of the rear cover 40 is transmitted to the wire 46 via the rod 42 and the bell crank 44. Reference numeral 47 denotes a connect pipe of the rotary working machine 30, and reference numeral 48 denotes a connect pipe 4
7 is a hitch plate fixed to 7. A triangular plate 49 is attached to the left hitch plate 48 when viewed from the side, and a first swing member 50 is pivotally attached to the plate 49 by a fulcrum pin 51 so as to be able to rotate back and forth.
A roller 53 is attached to an upper portion of the first swing member 50, and a pin 5 for attaching a front end of the wire 46 is attached to a lower end thereof.
5 is fixed, the front end of a spring 56 is locked on the upper part of the first swing arm 50, and the rear end of the spring 56 is fixed on the rotary working machine 30 side. It is always biased backward. Accordingly, when the cultivation depth is shallow and the rear cover 40 is standing, the first swinging member 50 is pulled rearward and is in a rearwardly inclined posture when viewed from the side, and the cultivation depth is increased to increase the rear cover 4.
When 0 moves upward, the rod 42 is pushed and the bell crank 44
Is rotated counterclockwise about the fulcrum 45, and as a result, the wire 46 is pulled rearward and the first swing member 5
The zero roller 53 is rotated forward.

On the other hand, the quick hitch 14 on the side of the three-point link hitch mechanism has a locking plate 5 as shown in FIG.
7 is fixed to the lower left portion of the main frame 23, and a second swinging member 60 is pivotally attached to the locking plate 57 by a fulcrum pin 58. At the upper part of the second swing member 60, there is provided a contact portion 60a which is bent in an inverted shape when viewed from the side, and the roller 53 of the first swing member 50 is attached to the contact portion 60a from the back. It is configured to abut.

A pin 61 is fixed to a lower end of the second swinging member 60, and a rear end of a wire 62 is connected to the pin 61. The front end of the wire 62 is connected to an arm 66 of a potentiometer 65 which is a tillage sensor mounted on the side of the hydraulic cylinder case 5 of the tractor 1. The arm 66 is constantly urged forward by a spring 68. Accordingly, as a result of the second swing member 60 being pushed from behind by the roller 53 of the first swing member 50, the second swing member 60
When the arm 66 rotates about the pin 58, which is the rotation fulcrum, the arm 66 is rotated counterclockwise while opposing the spring 68. Reference numeral 70 denotes a stopper for preventing the second swinging member 60 from being inverted (clockwise rotation in FIG. 6). The stopper 70 is fixed horizontally from the locking plate 57 to the second swinging member 60. As a result of the adhesion or the external force acting, the stopper 70 regulates even a force that causes a large rotation in the clockwise direction. As described above, the second swinging member 60 is always held in the backward tilted posture to prevent the second swinging member 60 from inverting itself, thereby preventing the second swinging member 60 from being damaged and deformed when the working machine is connected.

FIGS. 8 and 9 show the detailed structure of the second swinging member 60 and the locking plate 57 supporting the second swinging member.
Both holes 60 and 57 are provided with through holes 72 and 73 through which thin rods such as small bolts and screwdrivers can be inserted, and the wires 62 are aligned so that the through holes 72 and 73 are aligned when viewed from the side. Adjust the length. That is, the nut 7 of the outer wire 62a fastened to the base of the locking plate 57
4 and 74 are loosened to adjust the position of the outer wire 62a, and the protrusion of the inner wire 62b is adjusted so that the through holes 72 and 73 are eventually overlapped. Through hole 72,
The position where 73 coincides is the position where the posture of the second rocking member 60 is optimal, the roller 53 on the first rocking member 50 contacts the second rocking member 60 exactly, and the rear cover 40 The depth change is accurately detected and fed back to the tillage depth sensor 65 accurately. 8 and 9, reference numeral 75 denotes a rubber boot covering the outer periphery of the inner wire 62b.

FIG. 10 illustrates the case where the position of the rod 42 is changed when transmitting the vertical swing of the rear cover 40 to the cultivation depth sensor 65 on the tractor 1 side. The configuration will be briefly described. A metal fitting 77 having a folded piece 77a bent upward is provided on the rear upper portion of the rear cover 40 with a bolt 76.
And a bracket 78 having a triangular shape in a side view is fixed to the rear end of the main cover 39. A pivot arm 82 having two through holes 79 and 80 is pivotally supported by the bracket 78, and one of the through holes 79 and 80 and the folded piece 77a are supported.
And are connected by a rod 42.

When the through hole 80 close to the rotation axis is selected, the rotary work machine 30 is connected by using the quick hitch 14 as in the above embodiment. Lower link 1 without using
0, the rotary work machine 30 is directly connected to the rear cover 40.
When the side wire 46 is directly connected to the tillage depth sensor 65 of the tractor 1, the other through hole 79 is selected.

By changing the connection position of the rod 42 in this manner, the amount of pushing and pulling of the wire can be properly maintained, and it is possible to share the parts in both the direct mounting type and the quick type by using a common component. . Next, the operation will be described with reference to FIGS. When the rotary work machine 30 placed on flat ground is mounted, the lock of the quick hitch 14 (not shown) is released, and the lift arms 7, 7 are lowered to move the tractor 1 backward.

Then, the upper engaging portion 19 of the quick hitch 14 is sunk under the mast 16 of the rotary working machine 30, and the lift arms 7, 7 are rotated upward so as to scoop up the locking pin 17 on the mast 16 side. Let it. Then, as shown in FIG. 7, the rotary working machine 30 rotates clockwise around the locking pin 17, and the connecting pins 20, 20 of the rotary working machine 30 enter the lower engaging portions 22, 22 from behind.
In this state, a lock device (not shown) is operated to
And the connection with the working machine 30 are completed.

At this time, since the connection between the PTO shaft 34 of the tractor 1 and the input shaft 32 of the rotary working machine 30 is automatically performed, the tractor 1 is rotated while the PTO shaft 34 is rotated.
Is advanced, the tilling shaft 35 of the rotary working machine 30 rotates, and the soil is plowed by the tilling claws 38.

When the tilling operation is started and the tilling depth gradually increases, the rear cover 40 is lifted by the soil (the imaginary line in FIG. 7), and the movement is represented by the rod 42 and the bell crank 4.
4, transmitted to the first swinging member 50 via the wire 46. When the wire 46 is pulled backward, the roller 53 of the first swinging member 50 rotates forward, and the roller 53 pushes the contact portion 60a of the second swinging member 60 to rotate it counterclockwise. . Then, when the second swinging member 60 is pushed with the increase in the cultivation depth, the wire 62 is pulled, and the arm 66 of the cultivation depth sensor 65 is rotated to notify the controller (not shown) that the cultivation depth has increased. The controller reads the change and supplies the operating pressure oil into the hydraulic cylinder 4, and rotates the lift arms 7, 7 upward until the set working depth is reached. In this way, the plowing depth control is executed. In connecting the rotary working machine 30 to the tractor 1, the second swinging member 60 is provided with a locking plate 57.
The inversion of itself is prevented by the inversion-preventing stopper 70 fixed to the surface, so that the worker's hand hits it or mud or the like adheres and turns it downward (clockwise in FIG. 6).
The movement is prevented by the stopper 70, so that the second swinging member 60 always maintains the rearwardly inclined posture and is connected to the first swinging member 50 on the working machine 30 side. enable.

When the rotary working machine 30 is to be removed, the reverse operation may be performed. If the lock device (not shown) is released and the lift arms 7, 7 are moved downward, the rotary work can be easily performed. The locking pin 17 on the machine 30 side and the lower connecting pins 20, 20 are disengaged from the quick hitch 14.

Finally, the configuration of FIGS. 11 and 12 will be briefly described. The drawings shown in these figures disclose a stand configuration for stably supporting the rotary working machine 30 detached from the tractor 1. Stand 85
Are provided on the left and right, but since the configuration is the same, the right side will be described here.

Connect pipe 47 of rotary working machine 30
Two U-shaped bolts 86, 86 are provided near the outer end of the so as to sandwich the connect pipe 47 from behind, and provided.
A board 89 to which the square pipe 88 is fixed is attached to the bolts 86 and 86 and fixed with a nut 90. Stand 85
Is composed of a main frame 92 formed by bending a pipe and a caster 94, and a rectangular tube portion 92a provided on the main frame 92 is inserted into the square pipe 88 of the substrate 89 from the side to support the entire rotary working machine 30. And As is apparent from the description of this embodiment, the stand 85 does not require any processing on the rotary working machine 30 side and can be retrofitted, so that it is convenient.

[0026]

As described above, according to the present invention, the rotary working machine is connected to the tractor via the three-point link hitch mechanism so as to be able to move up and down, and the vertical swing of the rear cover on the rotary working machine side is controlled by the tractor side. In a configuration in which the rotary work machine can be automatically raised and lowered by transmitting the tillage depth sensor, a first swing member for transmitting the movement of the rear cover is pivotally mounted on the rotary work machine side so as to be rotatable around a horizontal axis. On the other hand, on the three-point link hitch mechanism side, a second rocking member that contacts the rocking member from the front and transmits the rocking amount to the cultivation depth sensor on the tractor side is provided rotatably about the horizontal axis, (2) Since the support portion for supporting the swing member is provided with an inversion prevention stopper for preventing the inversion operation of the second swing member, the swing of the three-point link hitch mechanism side when the tractor is connected to the rotary work machine. Hook the moving member Gravely direction reversal position, as a result of the forced coupling, there is no possibility to cause problems such as deforming damage the swinging member, anyone can easily connecting operation is facilitated matching operations.

Also, the second swinging member 6
The through hole 7 for adjusting the positional relationship between the supporting portion 57 that supports the first swing member 0 and the second swinging member 60 to an optimal relationship.
By drilling 2, 73, it is possible to easily perform the initial setting operation of the second swinging member that feeds back the amount of change in tillage depth to the tillage depth sensor on the machine side.

[Brief description of the drawings]

FIG. 1 is a side view of a three-point link hitch mechanism (quick hitch).

FIG. 2 is a front view of FIG.

FIG. 3 is a side view of an upper portion of the rotary working machine.

FIG. 4 is a front view of FIG. 3;

FIG. 5 is an enlarged side view of a main part.

FIG. 6 is a side view of the tractor and the rotary working machine.

FIG. 7 is a side view of the tractor and the rotary working machine.

FIG. 8 is an exploded perspective view of a main part.

FIG. 9 is an enlarged side view of a main part with a part cut away.

FIG. 10 is an exploded perspective view of a main part.

FIG. 11 is a side view showing a state where the stand is mounted on the rotary working machine.

FIG. 12 is a perspective view of a main part.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tractor 2 Transmission case 3 Rear wheel 4 Hydraulic cylinder 14 Three-point link hitch mechanism (quick hitch) 30 Rotary work machine 34 PTO shaft 39 Main cover 40 Rear cover 50 First swing member 60 Second swing member 70 Reversal prevention stopper

Continued on front page F-term (reference) 2B033 AA05 AB01 DA08 DB31 DB48 ED14 2B041 AA09 AB05 AC03 CA16 CF05 HA07 HA12 HA15 HA16 HA23 HA25 2B304 KA08 KA09 KA16 LA02 LA06 LB05 LB15 MA04 MB02 PC02 PC08 PD17 PD25 QA04 QA12 QA15 QA14 QA12 RA14 RA17 RA24 RA27

Claims (2)

[Claims] 1. A rotary work machine is connected to a tractor via a three-point link hitch mechanism so as to be able to move up and down, and the vertical swing of a rear cover on the rotary work machine is transmitted to a cultivation depth sensor on the tractor to perform rotary work. A first swinging member for transmitting the movement of a rear cover is rotatably mounted on the rotary working machine side about a horizontal axis, while a three-point link hitch mechanism side is provided. A second swinging member that contacts the swinging member from the front and transmits the swinging amount to the cultivation depth sensor on the tractor side is provided rotatably around a horizontal axis,
A work machine coupling device, wherein a support portion for supporting the second swing member is provided with a reverse prevention stopper for preventing a reverse operation of the second swing member. 2. A through hole for adjusting a positional relationship between the supporting portion for supporting the second swinging member and the second swinging member to an optimum relationship is provided. Claim 1
The working machine coupling device as described in the above.