JPS6242646Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a work equipment mounting device for a tractor.
In particular, the present invention relates to a mounting device that automatically connects a tractor and a working machine.

[Prior Art] Conventionally, the most common and widely used mounting method has been to connect an agricultural machine to the rear of a tractor via a three-point suspension system, but since the mounting process was troublesome, this method has been Applicants have proposed an automatic mounting device.

[Problems to be solved by the invention] This invention has been developed to further improve the automatic mounting device, which has problems such as difficulty in operation and unreliable connection. Installation can be easily carried out by a single worker operating the
Moreover, it is an object of the present invention to provide a mounting device that is easy to operate, connects more reliably, and prevents the connection state from being unnecessarily disconnected after connection.

[Means for solving the problem] In order to achieve this purpose, the device of the present invention is such that the working machine is attached to the rear of the tractor via a three-point suspension system, and the spacing between the lower links of the three-point suspension system is increased. It is equipped with a lower link support rod to be fixed, and a mounting mechanism provided on the working machine side that corresponds to the position and spacing of the lower link, and the mounting mechanism has a spacing corresponding to the positions of both ends of the lower link support rod. a hook member that is pivotally supported by the jaw member and locks the upper side of the lower link support rod; In a work equipment mounting device that has a lever part that rotates in the locking direction, a lower link support rod that is provided with a detent that contacts the jaw member and prevents vertical rotation, and a lower link support rod that connects the jaw member to the work equipment connection hole. a jaw member that protrudes further forward to receive the work equipment connection portion of the lower link support rod and guide it to the work equipment connection hole; and a resilient holding mechanism that holds the hook member in an open state and the lever part in an activated state. When the hook member is rotated against the elastic holding mechanism, the tip of the lock pin, which is pressed by the spring, comes into sliding contact with the side surface of the hook member, and at the position where the hook member is in the locked state, the lock pin is released. A locking mechanism is provided that engages with an engagement hole provided in the member and locks in that state, and the tractor with the lower link support rod installed between the lower links can be moved backwards while maintaining the posture of the work equipment in a fixed state. When guiding the work equipment connection part of the lower link support rod to the work equipment connection hole along the jaw part, push the lever part with the end of the lower link support rod, rotate the hook member, and lock it in the locked state. However, it is characterized in that the lower link support rod is configured to be engaged between the jaw member and the lower link support rod.

[Example] Hereinafter, an example of the present invention will be specifically described with reference to the drawings.

In FIG. 1, reference numeral 1 indicates a four-wheeled riding tractor, and a pair of left and right lower links 2 constituting a three-point suspension are attached at a predetermined interval to the rear of the tractor 1. Atsupa link 3 is attached above. A lower link support rod 4 is constructed between the lower links 2. As shown in FIG. 2, this lower link support rod 4 includes a support rod 4a which is horizontal on both left and right sides and is formed so as to hang down sequentially toward the center;
A lower link support pin 4 is fixed horizontally to both ends of the support rod 4a, is thinner than the diameter of the support rod 4a, and is passed through a pin hole formed at the tip of the lower link 2.
b, a work equipment connection part 4c formed at both ends of the support rod 4a, and a U-shaped part provided on the work equipment connection part 4c, which is in contact with a Jyo member to be described later and is connected in the vertical direction of the lower link support rod. Rotation stopper 4 that prevents rotation of
d and a conical guide 4e fixed to the inside of the detent 4d, and a lower link support pin 4b.
is passed through the pin hole of the lower link 2, and a retaining pin (not shown) is installed between the lower links and fixed.

The lower link support rod 4 shown in FIG. 2 naturally fits into the category of the three-point suspension system, but it may also be structured as shown in FIG. 3. . That is, the lower link support rod 4 shown in FIG. 3 has a support rod 4a formed in a U-shape, and has lower link support pins 4b similar to those shown in FIG. , a guide 4e is provided, and another lower link support pin 4'b is provided inside the guide 4e, this support pin 4'b is used as a category, and the support pin 4b is used as a category to form one lower link support rod. It is designed so that it can be used for both categories.

Reference numeral 5 designates a working machine typified by a rotary tiller, and the front portion thereof is provided with a jaw member 6 and a hook member 7, which constitute a mounting device, corresponding to the spacing between the lower links 2. Since this mounting device is bilaterally symmetrical, one side will be explained with reference to FIG. 4. The mounting member 6 whose proximal end side is fixed to the frame constituting the working machine 5 has a mounting part 6a on its distal end side that supports the working machine connecting part 4c of the lower link support rod 4 from below, and has a working part 6a behind it. A machine connecting hole is formed, and a hook member 7 is pivotally supported via a pin 8 on the upper side of the work machine connecting hole side of the jaw portion 6a. The hook member 7 is formed in a Z-shape with the pin 8 as the approximate midpoint, and has a hook portion 7a on the tip side.
Lever portions 7b are respectively formed on the rear end side, and the lever portions 7b
An engagement hole 7c is bored in the extension part of. Further, a tension spring 9 is provided between the upper part of the hook part 7a and the base of the jaw member 6, and normally holds the hook part 7a in an open state and the lever part 7b in an activated state. . Furthermore, a stopper 10 is provided on the side of the jaw member 6 to restrict the range of rotation of the hook member 7.

On the other hand, on the side opposite to the side on which the hook member 7 is pivotally supported on the jaw member 6, a lock mechanism 11 shown in detail in FIG. 5 is provided. This lock mechanism 11
A lock pin 11b is inserted into and supported by a support member 11a whose one end is fixed to the side surface of the jaw member 6, and its tip is inserted through a hole 11c formed in the jaw member 6 and extends toward the hook member 7 side. Hole 11
c is located on the rotation locus of the engagement hole 7c of the hook member 7, and the lock pin 11b has a spring 11d wound around the support member 11a and is locked by a locking pin 11e. The lock pin 11b is in contact with the side surface of the hook member 7 when it is in the open state, and when the lower link support rod 4 is set, the tip of the lock pin 11b is pushed into the engagement hole 7c by the elastic force of the spring 11d. The lock pin 11b is engaged and locked, and when the lock is released, the lock pin 11b is held by the spring 11.
When the hook member 7 is pulled against the elastic force d to release the engagement with the engagement hole 7c, the hook member 7 is opened by the tension spring 9, and the support rod 4 can be removed.

In addition, the code|symbol 12 is a top mast which connects the upper link 3.

The work equipment mounting device configured as described above, when mounting the work equipment 5 on the tractor 1, positions the work equipment 5 almost horizontally as shown in FIG. The support pin 4b or 4'b of the lower link support rod 4 is passed through the hole and locked to fix the lower link interval, and the lower link 2 is adjusted vertically while lower link 1 is moved back to connect the work machine. part 4c and the jyo part 6 of the jyo member 6
Place a and a at the same height and face each other. Then, when the lower link 1 is further retreated, the work equipment connecting portion 4
c slides on the jaw part 6a while its left and right position is corrected by the guide 4e, is guided to the work machine connection hole, comes into contact with the lever part 7b of the hook member 7, and the hook member 7 is pulled around the pin 8. The hook portion 7a rotates against the elastic force of the spring 9, and the hook portion 7a connects to the work equipment connecting portion 4c.
Lock the upper side. In this state, the rotation stopper 4d is pushed by the hook member 7 and comes into contact with the jaw member 6, thereby preventing the lower link support rod 4 from rotating in the vertical direction. When the hook portion 7a is closed, the lock pin 11b of the lock mechanism 11 engages with the engagement hole 7c to lock the hook member 7, the connection of the lower link 2 is completed, the upper link 3 is connected to the top mast 12, and the tractor 1 is connected to the upper link 3. The connection work with the working machine 5 is completed. These tasks can be easily performed by a single worker.

Agricultural work is carried out in the same way as in the past, but even if the force due to the lifting and lowering of the work implement 5 or vibrations during work act on the connecting portion between the lower link 2 and the work implement 5, especially the hook member 7, the locking mechanism 11, and the rotation of the lower link support rod 4 is prevented from rotating.
d is prevented from coming into contact with the jaw member 6, so that the connection will not come off. Further, the lower link support rod 4 shown in FIG. 3 can be used for two categories, so it is versatile and convenient.

When removing the work implement 5 from the tractor 1, remove the upper link 3 from the top mast 12 with the work implement 5 lowered, and then tighten the lock pin 1 of the lock mechanism 11.
When 1b is removed, the hook portion 7a of the hook member 7 is opened by the tension spring 9, releasing the working machine connecting portion 4c, and the connection is released.

[Effects of the invention] As explained above, according to the work implement mounting device for a tractor according to the present invention, the work implement connecting portion of the lower link support rod is received by the jaw portion and guided to the work implement connecting hole, and at this time, the hook member Since the lower link rotates and locks, the working machine and the lower link can be easily and reliably connected by one worker. Furthermore, the lock is locked as soon as the connection is completed, and the lock is reliable because the lock pin pressed by the spring at the base of the jaw member is connected to the connection hole, and there is no malfunction or failure of the lock. Furthermore, since the rotation of the lower link support rod is prevented by the rotation stopper coming into contact with the jog member, there is no risk that the connecting portion will come off unnecessarily during work, and it is safe. Further, to release the connection, it is sufficient to simply pull the lock pin against the spring, and the lock pin is maintained in the connectable state, so the operability of the connection operation is extremely excellent. Furthermore, the lock mechanism has a simple structure in which the lock pin is pressed by a spring, so
It is structurally robust and strong, and easy to manufacture and maintain.

[Brief explanation of the drawing]

FIG. 1 is an overall side view showing an embodiment of the present invention;
Fig. 2 shows a lower link support rod, (a) is a partial sectional view, (b) is a side view, and Fig. 3 shows another embodiment of the lower link support rod, (a) is a partial front view, (b) is a side view;
FIG. 4 is a side view of the mounting mechanism, and FIG. 5 is a plan view of the locking mechanism. 1...Tractor, 2...Lower link, 3...Upper link, 4...Lower link support rod, 4d...
Rotation stopper, 5... Work equipment, 6... Jyo member, 7
...Hook member, 7a...Hook member, 7b...
Lever portion, 7c...Engagement hole, 8...Pin, 9...Tension spring, 11...Lock mechanism, 11a...Support member, 11b...Lock pin, 11c...Hole, 1
1d... Spring, 11e... Locking pin.

Claims (1)

[Claim for Utility Model Registration] A work machine is attached to the rear of a tractor via a three-point suspension system, and a lower link support rod for fixing the lower link spacing of the three-point suspension system, and a lower link support rod provided on the work machine side. , a mounting mechanism that corresponds to the position and spacing of the lower link, and the mounting mechanism maintains a spacing corresponding to the positions of both ends of the lower link support rod, and a mounting mechanism that supports the lower side of the lower link and a mounting mechanism that supports the lower link. a hook member pivotally supported by the member and locking the upper side of the lower link support rod;
In a work equipment mounting device that has a lever part that rotates a hook member in the locking direction by pressing the lower link support rod, the lower link support is provided with a detent that comes into contact with the jaw member and prevents rotation in the vertical direction. a rod; a jaw member that protrudes forward from the work equipment connection hole to receive the work equipment connection portion of the lower link support rod and guide it to the work equipment connection hole; and with the hook member in an open state, the lever portion is actuated. When the hook member is rotated against the elastic holding mechanism, the tip of the locking pin pressed by the spring slides into contact with the side surface of the hook member, and the hook member is in the locked state. A locking mechanism is provided in which the locking pin engages with an engagement hole provided in the hook member in the relaxed position and locks in that state, and the lower link is held between the lower links by maintaining the posture of the work equipment in a stationary state. When the tractor with the support rod installed is moved backwards and the lower link support rod's work equipment connection part is guided to the work equipment connection hole along the jaw part, the lever part is pushed by the end of the lower link support rod and the hook member is rotated. 1. A working machine mounting device for a tractor, characterized in that the device is configured to be moved and locked in a locked state, and a lower link support rod is locked between the jaw member and the lower link support rod.