JPS6031443Y2 - rotary coupling device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a rotary coupling device, and more specifically, the present invention relates to a rotary coupling device, and more specifically, the rotary can be freely repositioned between tandem and offset positions with respect to a traveling work vehicle via a three-point linkage mechanism. Regarding this device, its main purpose is to enable the top link of the three-point linkage to be located on the center line of the traveling work vehicle, despite the above-mentioned position change, so that:
The purpose is to prevent the so-called twisting of the three-point linkage when moving up and down the rotary.

A three-point linkage mechanism is used to connect the rotary crane to a moving work vehicle such as a tractor that has a hydraulic system so that it can be raised and lowered freely.
It is known to change the position or arrangement of a traveling work vehicle and a rotary into tandem and offset mutual positions.

Conventionally, in the tandem type connection, the top link of the three-point linkage was designed to be located on the central extension line of the traveling work vehicle, so if the connection position was changed to the offset type, the rear of the top link mentioned above could be positioned. This tilts in the offset direction, causing so-called twisting when the rotary is moved up and down, and a large load is placed on the top link, making it difficult to expect smooth and accurate up and down movement.

Therefore, as disclosed in Japanese Utility Model Application Publication No. 51-118408, polygonal shafts are provided at the tips of the left and right lower link brackets and the top mast so that they can be moved back and forth in the lateral direction. There is a technology that connects the lower link and top link, but since the polygonal shaft protrudes greatly in the lateral direction, there is a risk of the shaft bending, and if this happens, it becomes impossible to move forward or backward in the lateral direction. There is a problem.

The present invention has been devised to solve this problem in view of the above-mentioned viewpoint, and is a device for connecting a rotary to a traveling work vehicle via a three-point linkage mechanism. A connecting frame each having a lower link attachment part is provided, brackets are provided side by side on the left and right sides of the rotary transmission box, and ground biasing bodies are respectively attached to a pair of left and right arms protruding outward from the transmission box on both sides. For mounting, a plate body is provided, each of these plates projects forward, and a plate body is attached to each of the left and right sides of each plate body, which protrudes forward from the arm body and parallel to the plate body, and The connecting frame is characterized in that the rear end portion of the connecting frame is closely fitted to the bracket and the plate body, respectively, so that the left and right positions can be changed and fixed.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

In FIGS. 1 and 2, reference numeral 1 denotes a traveling work vehicle exemplified as a two-axle, four-wheel type tractor, and a hydraulic device 3 having a pair of left and right lift arms 2 is mounted on the rear upper surface of the vehicle.

4 is a three-point link mechanism, consisting of a top link 5 in the center and a pair of lower links 6 on the left and right.
In the embodiment, one end of the top link 5, which is extendable and retractable with a screw structure, is detachably connected to an extension bracket 8 detachably provided on the base 7, and the middle of the lower link 6 and the lift arm 2 are connected to a lift rod. Connected by 9.

10 is a rotary, which is mainly composed of a machine frame 11, a tiller 12 that is driven to rotate around a horizontal horizontal axis, a tiller cover device 13, etc., and is connected to the work vehicle 1 via the aforementioned three-point linkage 4. ing.

The machine frame 11 includes a central conduction box 14 and a pair of left and right arms 15 protruding outward from the conduction box 14 on both sides.
The power receiving shaft 16 of the working vehicle 1 is interlocked with the PTO shaft of the working vehicle 1 by a transmission shaft 17 with a freely rearward hand, so that the tilling section 12 can be driven, and in the embodiment, a side drive system is illustrated. .

Reference numeral 18 denotes a connection frame for relay connection, and as is clearer from FIGS. 3 and 4, it includes a top mast 19 in the center, a pair of left and right lower link attachment arms 20, and attachment arms 20. The top mast 19 is composed of a pair of left and right support arms 21 that connect the top mast 19, respectively.The top mast 19 is sloped upward in the front as shown in the second figure, has a top link attachment part 19A at the front part, and a lower link attachment arm. 2
0 has a downward slope in the front, and has a lower link attachment portion 20A at the front thereof.

In the embodiment, the top link attachment portion 19A has a hole structure and is detachable by inserting and removing the attachment pin 22, but the attachment portion 19A may have a pin shape and the top link side may have a hole structure.

Furthermore, although the lower link attachment portions 20A are shown as pins that protrude inwardly toward each other, these pins may protrude outwardly.

Alternatively, the mounting portion 20A may have a hole structure and the ball joint of the lower link and the mounting portion 20A may be connected by inserting and removing a pin.

The rear end of the connecting frame 18 can be fixed to the rotary machine frame 11 by changing its left and right positions. For this reason, mounting brackets 23 having holes are installed at intervals in the left and right directions on the upper part of the transmission box 14. The rear part of the top mast 19 can be attached and detached by inserting and removing a pin 23A, and furthermore, three plates 24 are fixed and protruded at intervals from each of the left and right arm bodies 15 in the form of a forward inclined protrusion. The lower link mounting arm 20 is fitted and held in the clamping portion 24A between each plate body 24, and is configured to be detachable with a fastener 25.
The numbers shown in the figure indicate the so-called offset amount.

Of course, three or more mounting brackets 23 may be provided, and the same number of fitting holding portions 24A may be provided between the plates 24.

In addition, in FIG. 1, 26 is an auxiliary traveling device;
It is worn when working in wet fields.

Reference numeral 27 denotes a ground biasing body, which is provided using the plate body 24.

Of course, although no gauge device is attached to the rotary in the illustrated example, a front gauge, a rear gauge, etc. may be attached as a gauge device.

To explain the operation of the embodiment above, the tilling section 12 of the rotary 10 connected by the three-point linkage 4 is rotationally driven by the travel of the traveling work vehicle 1 and the drive of the circular zero axis, and the tilling work is carried out. As shown in FIG. 3, the rear part of the top mast 19 of the connecting frame 18 is connected to the mounting bracket 23 on the right side of the transmission box 14 with a pin 23A and other mounting tools, and the lower link mounting arm 20 of the connecting frame 18 is connected to the mounting bracket 23 on the right side of the transmission box 14.
The working vehicle 1 and the rotary 10 are connected in a so-called tandem manner by fitting and holding the respective rear portions into the right-hand holding portions 24A of the pair of left and right arms 15 and connecting them with the fasteners 25. This is the standard connected position.

Therefore, the rotary 10 was used as a work vehicle 1 for work such as plowing along the ridge.
To offset to the right or left, use the aforementioned pin 23.
If the A1 fastener 25 is removed and the attachment positions of the rear part of the top mast 19 and the lower link attachment arm 20 are changed, for example, as shown in FIG. 4, the rotor I710 will be offset to the right relative to the work vehicle 1. There is, and at this time,
The top link 5 is positioned on the extension of the center line of the work vehicle 1, as in FIG. 3.

In addition, the lower link 6 of the three-point linkage 4 and the work vehicle 1
are connected with a check chain or the like to prevent sway. At this time, in the case of Fig. 3, if the chain is stretched externally, no force will be applied to the retaining pin at the rear of the lower link 6, and this is different from Fig. 3. On the other hand, if the pin is facing outward, placing the chain inside will prevent strain on the retaining pin.

According to the present invention, the connection frame 18 has a top link attachment portion 19A and a pair of left and right lower link attachment portions 20A.
A plate body 24 whose rear end is attached to a bracket 23 provided on the transmission box 14 of the rotary 10 and a pair of left and right arm bodies 15.15 protruding outward on both sides from the transmission box 14;
Since the top link 5 is attached to the top link 24 so that the left and right positions can be freely changed and fixed, the top link 5 can be positioned on an extension of the center of the traveling work vehicle 1 in both cases where the rotary 10 is connected to the traveling work vehicle 1 in a standard manner or in an offset manner. This has the advantage that even when the rotary 10 is raised and lowered, the top link 5 does not twist, ensuring smooth and accurate raising and lowering operations, and also improving the durability of the top link 5.

Further, the plate body 24 attached to the pair of left and right arm bodies 15, 15 is attached to the ground biasing body 27 of the rotary cover, and the arm body 15, The plate bodies 24 attached to the frame 15 are parallel to each other and protrude forward, and the rear end of the connecting frame 18 is tightly fitted into the plate bodies 24, 24, so that the connection is simple. Not only can this be done, but the connection is strong and there is less wobbling in the left and right direction.
As a result, the rigidity of the plates 24, 24 can be increased.

[Brief explanation of the drawing]

Fig. 1 is an overall plan view of an example of the present invention, and Fig. 2 is a side view of the same part omitted. FIG. 3 is a plan view of the standard connection, and FIG. 4 is a plan view of the offset connection. 1... Traveling work vehicle, 3... Hydraulic system,
4...Three-point link mechanism, 5...Top link, 6...Lower link, 10...
...Rotary, 14...Conduction box, 15...
...Arm body, 18...Connection frame, 19A...
...Top link mounting part, 20A...Lower link mounting part, 23...Top mast mounting bracket, 24...Lower link arm holding part.

Claims (1)

[Scope of utility model registration request] In a device for connecting a rotary 10 to a traveling work vehicle 1 via a three-point linkage 4, a transmission box 1 of the rotary 10 is connected.
Brackets 23 are installed in parallel on the left and right sides of the transmission box 1.
A pair of left and right arms 15, 15 protruding outward on both sides from 4.
Plates 24, 24 having ground biasing bodies 27 are attached to the plate bodies 24, 24, each of which has a forwardly projecting shape, and these plates 24, 24 are provided on both sides of each of these plates 24, 24. Parallel forward protruding plate body 24.2
4 is attached to the arms 15, 15, and the rear end portion of the connecting frame 18, which has a top link attachment portion 19A and a pair of left and right lower link attachment portions 20A, is fixed to the bracket 23 and the plate body 24, respectively, to change the left and right positions. A rotary coupling device characterized in that the rotary coupling device is mounted in a freely fitting and tight-fitting manner.