JPH0449851Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial field of application The present invention provides a three-point link hit-type working machine attachment device provided on the main body of an agricultural machine, and a separate attachment device for the three-point link hit-type work machine installed on the main body of the agricultural machine. The present invention relates to a mechanism for attaching and detaching a work implement to an agricultural machine, which includes a fixed bracket for mounting the work implement.

BACKGROUND TECHNOLOGY In recent years, agricultural machinery has been equipped with three work equipment mounting brackets that are fixed to the main body of the agricultural machine separately from the known three-point link hitch type work equipment mounting device, and these mounting brackets are used to attach the work equipment. is attached.

That is, the work implement mounting bracket is provided with a hook-like engaging member that can be opened and closed, and by engaging the frame of the work implement with the hook-like engaging member, the work implement can be attached to an agricultural machine. It is attached to the main body.

Problems to be Solved by the Invention In the above-mentioned conventional agricultural machinery, the above-mentioned hook-like engaging member is opened and closed by human power when attaching and detaching the work implement.

However, since the weight of the work machine acts on the hook-shaped engagement member of the above-mentioned work machine mounting bracket,
Manual opening/closing operations require a great deal of effort, and in addition to the weight of the work equipment mentioned above, it may also be extremely difficult to open/close the hook-like engagement members when twisting forces are applied. Ta.

Means for Solving the Problems The present invention has been made in view of the above problems, and has a three-point link hitch type work machine mounting device 2 at the front end or rear end of the agricultural machine body 1.
Separately from the three-point link hitch type work machine mounting device 2, a work machine is provided with an engaging member 22 at the upper center of the vehicle width on the mounting side of the three-point link hitch type work machine mounting device 2 of the agricultural machine main body 1. It has a first bracket 3 for mounting, and second brackets 4, 4 for mounting the work machine, which have engagement recesses on both sides of the lower part of the first bracket 3, and the first bracket 3 for mounting the work machine. In an agricultural machine in which a frame 32 of a working machine 5 is connected and integrated by a second bracket 3, 4, 4, the engaging member 22 of the first bracket 3 for mounting the working machine is a three-point hitch type. The engaging member 22 is connected to the lift arms 12, 12 of the work machine mounting device 2, and operates in conjunction with the lift arms 12, 12.
This is a work equipment attachment/detachment mechanism for agricultural machinery that engages with or disengages from the frame of the work equipment.

Function The work equipment attachment/detachment mechanism for agricultural machinery according to the present invention is as follows:
Using the lift arm of the point link hit type work equipment mounting device, the engaging member of the first bracket for mounting the work equipment is engaged with the frame of the work equipment in conjunction with the swinging movement of the lift arm. It was designed to make them leave.

Embodiment FIGS. 1 to 4 show an embodiment of an agricultural machine to which the work implement attachment/detachment mechanism according to the present invention is applied.

In the drawing, 1 is the agricultural machine body such as a tractor,
Reference numeral 2 denotes a known three-point link hitch type work machine mounting device disposed at the rear of the agricultural machine body 1; 3, 4, 4;
5 are first and second brackets for mounting the work machine which are fixedly fixed to the agricultural machine body 1 separately from the three-point link hitch type work machine mounting device 2, and 5 is the first bracket for mounting the work machine. 3 and a working machine attached to the agricultural machine main body 1 by the second brackets 4, 4, and 6 shows a working machine attaching/detaching mechanism according to the present invention.

The three-point link hitch type work machine mounting device 2 is as follows:
As shown in FIG. 2, there is a rod-shaped top link 10 disposed approximately at the upper rear center of the agricultural machine main body 1 so as to be able to swing in the vertical direction, and a rod-shaped top link 10 arranged vertically swingably on both sides of the rear lower part of the agricultural machine main body 1. Arm-shaped lower links 11, 11 arranged so as to be swingable, and a lift arm 1 arranged above the lower links 11, 11.
2, 12, and lift rods 13, 13 that connect the tips of the lift arms 12, 12 and the substantially central portions of the lower links 11, 11, and a pin is attached to the tip of each of the links 10, 11, 11. hole 1
4, 15, 15 are formed in the axle direction of the agricultural machine main body 1.

The lift arms 12, 12 are provided with only upward swinging motion by a single-acting hydraulic cylinder [not shown] that is built into the body of the agricultural machine main body 1 and operated from the driver's seat. The swinging movement is performed by the lower link 11, via the lift rods 13, 13.
11, and the lower links 11, 11 are configured to be able to swing upward.

The first bracket 3 and the second bracket for mounting the above working machine.
Of the brackets 4, 4, the first bracket 3 (hereinafter referred to as the upper bracket) for mounting the working machine is fixedly installed in the upper center of the agricultural machine body 1.
As shown in FIG. 3, two plate members 21 each having a substantially U-shaped engagement groove 20 formed therein,
21, and a hook-shaped engagement member 22 rotatably disposed between the upper portions of the proximal ends of the hooks 21. On the other hand, second brackets (hereinafter referred to as lower brackets) 4, 4 for mounting a working machine fixedly installed on both sides of the lower part of the agricultural machine main body 1 are formed in the shape of a hook.

The working machine 5 is a bucket loader in this embodiment. The bucket loader 5 includes a substantially horizontal T-shaped frame 32 with locking pin shafts 30, 31, 31 arranged on both sides of the upper and lower sides, and an upper link 3 pivotally pivoted to the upper end of the frame 32.
3, a lower link 34 pivotably attached to the tip of the frame 32, an inverted L-shaped lift arm 35 with its base end pivotably attached to the tip of the lower link 34, and the lift An intermediate support 37 is fixed to a bent part of the arm 35 and has the tip of the upper link 33 pivotably attached thereto, and the base end of the dump cylinder 36 pivotably, and the frame 32 has A lift cylinder 38 has one end pivotally attached to the lower part and the other end pivotably attached near the pivot point between the lower link 34 and the lift arm 35; 36 and a bucket 40 to which the driving force of 36 is transmitted via a link mechanism 39.

The locking pin shafts 30, 31, 31 are each
It corresponds to the upper bracket 3 and the lower brackets 4, 4, and the upper locking pin shaft 30 is inserted into the engagement grooves 20, 20 of the upper bracket 3, and then is inserted by the hook-like engagement member 22. It is engaged with the upper bracket 3 by preventing it from coming off, and the lower locking pin shafts 31, 31 are simply fitted into the lower brackets 4, 4.

That is, the bucket loader 5 has a frame 32
The agricultural machine body 1 is attached to the agricultural machine body 1 by engagement of the locking pin shafts 30, 31, 31 disposed in the upper bracket 3 and the lower brackets 4, 4.

As shown in FIG.
The lift arms 12, 12 of the point-link hit type work equipment mounting device 2, the hook-like engagement member 22 of the upper bracket 3, and the predetermined size for connecting the tip of the lift arm 12 and the hook-like engagement member 22.
It is composed of shaped coil springs 41, 41. Therefore, the hook-like engaging member 22 is configured to open and close as the lift arms 12, 12 swing.

In the above configuration, when removing the bucket loader 5 from the installed state shown in FIG.
2 and 12 upward. Then, the hook-like engagement member 22 engages the lift arm 12,1.
2, the locking pin shaft 3 is pulled upwardly by the coil springs 41, 41 and swings upward.
0 is released. After this, the bucket loader 5 can be removed from the agricultural machine main body 1 using the conventional procedure.

Incidentally, when attaching the bucket loader 5 to the agricultural machine main body 1, it is sufficient to perform the procedure in reverse order as described above.
In this case, the hook-shaped engagement member 22 swings downward due to its own weight, and the locking pin shaft 30 pushes away the hook-shaped engagement member 22, causing the engagement grooves 20, 2
0, and the hook-like engaging member 22 and the locking pin shaft 30 engage with each other.

In addition, in the above embodiment, the lift arm 1
2, 12 and the hook-like engaging member 22 are connected by coil springs 41, 41.
A chain or the like may be used instead of the coil springs 41, 41, and in this case, the lift arm 12,
Forcibly oscillate by upward oscillation of 12,
The engagement state with the locking pin shaft 30 can be released.

In addition to directly connecting the tips of the lift arms 12, 12 and the hook-like engagement member 22 with springs and wires as described above, as shown in FIG. A rod-shaped spring member 42 is installed, and a ring-shaped member 43 made of wire or the like is mounted on the upper surface of the hook-shaped engagement member 22.
and fix the spring member 42 to the ring-shaped member 42.
by inserting the lift arms 12, 12 into the
and the hook-like engagement member 22. In this case, even if the lift arms 12, 12 are raised more than necessary, the spring member 42 is bent and the work equipment attachment/detachment mechanism 6' is Damage is prevented.

Further, in the above embodiment, the present invention is applied to an agricultural machine body having a three-point link hitch type work implement mounting device and a work implement mounting bracket at the rear, but the present invention is not limited to the above embodiment. First, the present invention can be applied to an agricultural machine main body in which a three-point link hitch type work implement mounting device is also provided at the front part, or to an agricultural machine main body of a type that has a work implement mounting bracket in the front part.

In the above explanation, all the engaging members such as hook-like engaging members are connected to the lift arm, and are engaged with and disengaged from the frame of the work equipment in conjunction with the swinging movement of the lift arm. However, in the present invention, the engagement member is not limited to the lift arm, and it is also possible to connect the above-mentioned engaging member to a lift rod or a lower link, which can be moved in the vertical direction by the lift arm.

Effects of the Invention As explained above, the work equipment attachment/detachment mechanism for agricultural machinery according to the invention utilizes the lift arm of the three-point link hit type work equipment attachment device, and works in conjunction with the swinging motion of the lift arm. No. 1 for mounting on the machine
Since the engaging member of the bracket can be engaged and disengaged from the frame of the working machine, there is no need to manually engage and disengage the engaging member from the frame of the working machine, and the operator can It is extremely practical because the engagement and disengagement described above can be performed simply by hydraulically operating the lift arm from the driver's seat of the main body.In addition, the mechanism of the present invention is suitable for lifts of conventional three-point link hitch type work equipment mounting devices. Since it uses an arm, it can be implemented at extremely low cost without using a special power device.

[Brief explanation of drawings]

1 to 4 show an embodiment of a work implement attachment/detachment mechanism for an agricultural machine according to the present invention, and FIG. 1 is a schematic side view of an agricultural machine to which the work implement attachment/detachment mechanism according to the present invention is applied; Fig. 2 is an enlarged perspective view of the main parts of the three-point hitch type work equipment mounting device, Fig. 3 is an enlarged perspective view of the main parts of the work equipment attachment/detaching mechanism, and Fig. 4 is a schematic diagram of the main parts of the work equipment attachment/detaching mechanism. It is a front view. Fifth
The figure is an enlarged perspective view of a main part showing another form of the connection structure between the lift arm and the hook-like engagement member in the above embodiment. 1... Agricultural machine body, 2... 3-point link hitch type work equipment mounting device, 3... Upper bracket [first bracket for mounting the work machine], 4, 4... Lower bracket [first bracket for mounting the work machine] 2 bracket],
5...Bucket loader [work equipment], 6...Work equipment attachment/detachment mechanism, 12, 12...Lift arm, 22...
...Hook-like engagement member [engagement member], 32...Frame.

Claims (1)

[Scope of claim for utility model registration] 3.
It has a point link hitch type work equipment mounting device, and the above 3
Separately from the point link hitch type work equipment device, there is provided a first bracket for mounting the work equipment, which is provided with an engaging member at the upper center of the vehicle width on the side where the three point link hitch type work equipment mounting device is attached to the main body of the agricultural machine. and a second bracket for mounting the work machine, which has engagement recesses on both sides of the lower part of the first bracket, and the frame of the work machine is fixed by the first and second brackets for mounting the work machine. In an agricultural machine that connects and integrates the engaging member of the first bracket for mounting the work equipment, the engaging member of the first bracket for mounting the work equipment is connected to the lift arm of the three-point link hitch type work equipment mounting device, and the engaging member A work equipment attachment/detachment mechanism for agricultural machinery, characterized in that a mating member is engaged with or disengaged from a frame of the work equipment.