JPS59198902A - Hitch apparatus of direct mounting type working machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to a connecting device for a directly mounted working machine that is mounted directly on a tractor, and more specifically, it relates to a connecting device for a directly mounted work machine that is mounted directly on a tractor. The invention relates to a coupling device suitable for attaching a vehicle to a tractor.

<Prior art> When a large-volume work machine such as a sprayer, broadcaster, etc. is mounted directly on a tractor, the work machine is placed as close to the tractor as possible to reduce the lifting moment that acts on the front wheels of the tractor. However, since the space between the front of the working machine and the back of the tractor becomes extremely narrow, there are problems in that the connection work becomes difficult and the danger increases.

The conventional connection method is the left and right F in the three-point link of I.
The partial link is pinned directly to the frame of the working machine, the working machine is lifted up by the partial link, and the upper link of the three-point link is pinned to the machine frame, thus forming a dirty four-bar link mechanism. The connection is completed by fixing (two-dimensionally the older brother) with an auxiliary link, etc. When coupling, the tractor must be driven to bring the tip of the lower link close to the pinning position on the machine frame, which requires a signal to the tractor driver from outside the tractor driver. A person is needed. Also, the work of pinning the rib link to the front of the work machine is as follows:
Because it was performed in a small space, it was extremely dangerous and often caused accidents.

In order to solve this dangerous connection method that requires two people, the inventor of the present application previously proposed a device that allows only the tractor driver to connect the work equipment. The proposal (Unexamined Japanese Patent Publication No. 56-16
The coupling device of No. 4702) includes a hook formed at the tip of a partial link of the tractor, a slider attached to the tip of the lower link, and a mast provided at the front of the work machine.
It consists of a catch set on the underframe of the work equipment. Lift the underframe with the lower link, hook the hook onto the pin of the mast, slide the work equipment forward, insert the slider into the catch, and then lift the underframe with the lower link. This connection method involves lowering the handle slightly and hooking a fixed hook onto the upper link to prevent the machine from sliding forward. However, in order to slide the work equipment forward, the work equipment must be lifted using the lower link and tilted forward considerably. In the case of a high work machine, there was a risk that the work machine would fall forward.

<Problem of the Invention> An object of the present invention is to provide a coupling device that allows a tractor driver to safely and easily mount a working machine on a tractor even if the working machine is tall.

<Means for achieving the object> The device of the present invention consists of a main frame attached to the working machine side and an auxiliary frame attached to the three-point link side of the tractor, and the main frame and the auxiliary frame can be connected to each other. It has a mast part and a pedestal part, and the pedestal part is divided into left and right parts behind the mast part. The two-part link of the three-point link is pivoted to the auxiliary frame mast part, and the lower link is pivoted to the auxiliary frame pedestal part. The main frame mast portion and the auxiliary frame mast portion are provided with coupling means for rotatably coupling the main frame mast portion and the auxiliary frame mast portion.

A guide means is provided on the main frame mast section to guide the insertion of the auxiliary frame mast section and the connection of the two coupling means, and a guide means is also provided on the main frame pedestal section to facilitate fitting of the auxiliary frame pedestal section. It is preferable to do so. Further, it is preferable that after the auxiliary frame pedestal part and the main frame pedestal part are fitted together, a fastening means is provided for releasably fixing them, and the means for fixing the three-point link is operable by a tractor.

<Operation> In order to operate the installation of the present invention, first, the tip of the auxiliary frame mast section must be inserted into the main frame mast section, but it is necessary to make sure that the tip of the auxiliary frame mast section enters the main frame mast section. Driving a tractor is extremely easy and does not require a separate person to give signals to the driver. Then, when the lower link is lifted and the connecting means of the auxiliary frame mast part and the main frame mast part are combined, and the auxiliary frame pedestal part is aligned with the main frame pedestal part, the auxiliary frame mast part is connected to the main frame via the connecting member. Since the working machine is pulled forward, the auxiliary frame pedestal part is reliably fitted into the main frame pedestal part. Next, the means for fixing the three-point link is operated, but all operations up to this point can be performed on the tractor. Finally, the user gets off the tractor and operates the fastening means to fix the main frame pedestal and the auxiliary frame pedestal.

In the device of the present invention, since the partial link pulls the working machine toward the tractor side through the coupling means of the auxiliary mast part and the main frame mass I part, the main frame pedestal can be will fit securely into the auxiliary frame pedestal. Therefore, even if the working machine is tall, there is no risk that the working machine will fall forward when connected. The connection work can be virtually done by the tractor driver alone and while riding on the tractor 77.
There is no need to put your hand between the front of the dangerous working machine and the back of the tractor, so there is no risk of safety 1- accidents occurring.

<Example> The apparatus of the present invention will be explained based on embodiments shown in the drawings.

As shown in FIG. 1, a sprayer 11, which is a working machine, is directly attached to the back of a tractor 10.

The sprayer 11 is fixed to a machine frame 12, and the machine frame 12 is pivoted to one part link 13 of a three-point tractor link and left and right lower links 14. Auxiliary link 40 is attached to axis 1 on machine frame 12
1, and its auxiliary link is detachably hooked onto the upper link 13. When viewed from the side, tractor 1
0, the frame 12, the upper link 13, and the lower link 14 form a four-bar link mechanism, and when the auxiliary link 40 is hooked to the upper link 13, the degree of freedom becomes O. Fixed. In other words, the three-point link of the tractor IO is fixed by operating the auxiliary link 40.

As shown in FIG. 2, the machine frame 12 includes a main frame 20 fixed to the working machine and an auxiliary frame 30 attached to the three-point link of the tractor.
Both the main frame 20 and the auxiliary frame 30 each have a mast part 21.31 that stands upright and a pedestal part 22.32 that is divided into left and right parts from below the mast part and extends rearward. The main frame mast section 21 has a U-shaped cross section, and therein an auxiliary mast section 31.
A guide plate 23 is provided as a guide means for smoothly fitting the parts.

Auxiliary frame pedestal part 32 that is also inserted from below into the main frame pedestal part 22
A guide plate 24 is attached to guide the user. A pin 25 is attached to the main frame pedestal part 22, and after the main frame pedestal part 22 and the auxiliary frame pedestal part 32 are connected, the pin is passed through the pin hole 35 of the auxiliary frame pedestal part 32 to fix the circular pedestal part together. do.

Attach the lower link of the tractor to the pedestal part 32 of the auxiliary frame 3θ.
The first pin 3B is planted, and the upper link 13 of the mast part 31 is pinned so as to be rotatable in a vertical plane. Mast part 3
An auxiliary link 40 is attached to the bottom of the pin 1 so that it can rotate in a vertical plane.
1-, hook 41 in the middle of the auxiliary link 40
form. ” - Insert the pin 42 in the 4th part link 13,
Hook 41 on the pin and stop it. 1 part link 13
to be fixed. Connect the wire 43 to the tip of the auxiliary link 4o.
The wire 43 is stretched to the tractor driver's seat (not shown) via the pulley 44 installed on the link 13J- (=I). When the wire 43 is pulled on the tractor, the hook 41 is attached to the pin. 42, the -1 part link 13 becomes free, and when the J part link 13 is tilted at a predetermined angle.

When the wire 43 is released, the hook 41 engages the pin 42 and the two-part link 13 is fixed. As a means for connecting the upper frame mast section 21 and the auxiliary frame mast section 31 so as to be mutually rotatable, a pin 27 is fixed horizontally to the manute section 21, and a groove-shaped hook 37 is attached to the upper end of the other auxiliary frame mast section 31. form.

Next, the connection work of the working machines will be explained based on FIGS. 3 to 6. As shown in FIG. 3, the tractor 10 is moved backward, the tip of the auxiliary frame mast section 31 is placed into the main frame mast section 21, and the auxiliary frame pedestal section 32 is positioned below the main frame pedestal section 22. When hydraulic pressure is applied to lift the lower link 14, the auxiliary frame pedestal section 32 rotates in the direction of arrow A, and the auxiliary frame mast section 31 moves towards the main frame mast section 2 as shown by arrow B.
1, the hook 37 is coupled with the pin 27.

After the pin 27 and the hook 37 are connected, as shown in FIG. being pulled forward. Furthermore, the lower link 14
As the auxiliary frame base portion 32 rotates and becomes horizontal, the main frame base portion 22 fits into the auxiliary frame base portion 32, and as shown in FIG. Fit into place. Here, as shown in FIG. 6, if the wire 43 is loosened,
The auxiliary link 40 is lowered, the hook 41 is hooked on the pin 42, and the three-point link is fixed. All operations up to this point can be performed on the tractor. Next, the user gets off the tractor, inserts the pin 25 of the main frame pedestal 22 into the pin hole 35 of the auxiliary frame pedestal 32, and folds the legs of the working machine, thereby completing the work of connecting the working machine.

If the connection operation is performed in reverse, the work implement can be removed from the tractor in the cylinder. First, extend the legs of the work machine and remove the fastening pins between the main frame pedestal and the auxiliary pedestal. Next, get on the tractor and pull the wire to unhook the auxiliary link from the pin. Then, as the lower link is lowered by hydraulic pressure,
The hook on the auxiliary frame mast comes off the pin on the main frame mast, the main frame and the auxiliary frame are separated, and the legs of the main frame land on the ground, completing the separation work.

As stated above, the device of the present invention is attached to and detached from the tractor without tilting the working machine forward that much, so even if the working machine is tall, there is no possibility that the working machine will fall forward when it is attached or detached. The attachment/detachment work is extremely easy since the tractor driver can carry out the work substantially while riding on the tractor, and can be done safely since there is no need to touch dangerous parts.

[Brief explanation of the drawing]

1. FIG. 1 is a side view of a working machine and a tractor equipped with the device of the present invention, and FIG. 2 is an enlarged perspective view showing the machine frame of FIG. 1 exploded.
3 to 6 are schematic diagrams showing the state in which the working machine is mounted on a tractor. 10: Tractor, 11: Work equipment, 12: Machine frame, 13:
Two-part link, 14: Lower link, 20: Main frame, 21: Main frame mast section, 22: Main frame pedestal section, 23, 24: Guide plate (guiding means), 25: Pin (fastening means), 27: Pin (coupling means), 30: auxiliary frame, 31: auxiliary frame mast part,
32: Auxiliary frame pedestal, 35: Pin hole (fastening means), 37
: Hook (connecting member), 40: Auxiliary link Applicant: Toyo Noki Co., Ltd. 2

Claims (1)

[Scope of Claims] 1) A coupling device comprising a three-point link of a tractor, a machine frame of a working machine pivoted to the three-point link, and means for fixing the three-point link in an operable manner. The machine frame is composed of a main frame that can be accessed to the working machine side and an auxiliary frame that is attached to the three-point link side, and the main frame and the auxiliary frame each extend to the mast portion and rear left and right positions from the mast portion. The main frame pedestal is configured to be connectable to the auxiliary frame pedestal, and a partial link of the three-point link is connected to the auxiliary frame mast and a lower link is connected to the auxiliary frame pedestal. 1. A connecting device for a directly mounted working machine, characterized in that a coupling step is provided which is movably attached to the main frame mast portion and the auxiliary frame mast portion and which can be rotatably coupled to each other. 2) The connection of a directly mounted working machine according to claim 1, characterized in that the main frame pedestal part and the auxiliary frame pedestal part are provided with detachable fastening means that rotatably couple them to each other. Device. 3) The main frame mast section and the auxiliary frame mast section are provided with coupling means consisting of pins and hooks, and the auxiliary frame mast section has the coupling means located at its upper end. A coupling device for a directly mounted work machine according to item 2. 4) Any one of claims 1 to 3, characterized in that the main frame mast section is provided with guide means for aligning the auxiliary frame mast section and the auxiliary frame pedestal section along the main frame pedestal section, respectively. A coupling device for a directly mounted work machine as described in item -. 5) The auxiliary frame mast section is provided with an auxiliary link that can be freely rotated, and the two-part link and the auxiliary link are provided with coupling means consisting of a pin and a hook. A coupling device for a directly mounted work machine according to any one of clauses 4 to 4.