JPH0238569Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention is designed to facilitate connection, especially when a working machine such as a boom sprayer is mounted on an agricultural tractor.

[Conventional technology]

Conventionally, when installing a work machine on this type of tractor,
One upper link that can be raised and lowered protrudes rearward from the upper center of the rear end of the tractor, and two lower links that can also be raised and lowered that protrude from symmetrical positions downward on the left and right with respect to this upper link are used. It was attached using so-called three-point support.

[The problem that the idea aims to solve]

However, for example, when attaching the load of a working machine to the front, when connecting the lower link and the working machine using a connecting pin, the rear wheels of the tractor get in the way, making it necessary to perform the connecting work in a joint manner. I couldn't do it.

[Means to solve the problem]

This invention was made with the intention of solving the above problem, and the upper link is pivotally supported on the upper rear end of the tractor so as to be able to rise and fall, and two link pieces are formed facing each other to form a plurality of link pieces. A link base in which engagement holes are arranged in a longitudinal direction, a movable link piece inserted between the link pieces of this link base, one of the engagement holes arranged in a longitudinal direction in this movable link piece, and the link. and a locking pin that passes through one of the engagement holes of the link piece of the base, and connects the two lower links to the working machine. a fixed body;
A movable connecting piece that is slidably inserted into the fixed body and has an engagement pin protruding from the side surface of its tip and is connected to the attachment side end of the lower link, and a support that is attached to the side surface of the fixed body. In the filling,
The present invention proposes a connection structure between a tractor and a mounting work machine, which is comprised of a locking holder that is engaged in an engagement groove of the movable connection piece through a window hole of a constantly fixed main body using a compression spring. be.

[Effect]

That is, this invention uses the above-mentioned structure to make the upper link and the lower link or the connecting body between the lower link and the working machine extendable and retractable, so that the working machine can be easily connected.

〔Example〕

Examples of this invention will be described below based on the drawings.

FIG. 1 shows a schematic side view of a tractor 1 on which a working machine 2 such as a boom sprayer is mounted. , two lower links 4, 4 that can be raised and lowered and protrude from left and right downward symmetrical positions with respect to the upper link 3, and two connecting bodies 5 that control the connection between the lower link 4 and the working machine 2,
A working machine 2 is connected to and mounted on the rear end of the tractor 1 via a connecting support part (see FIG. 2) consisting of 5 and 5.

As shown in FIG. 3, the upper link 3 includes a link base 7 which is rotatably pivoted to a bracket 1' at the upper rear end of the tractor 1 with a pivot pin 6, It is composed of a movable link piece 8 that can extend and contract along the longitudinal direction of this link base 7 on the free end side, and a locking pin 9 that fixes and holds this movable link 8 to the link base 7. The link piece 7 of the link base 7 is formed by fixing two link pieces 7a, 7a, each having a plurality of engagement holes 7', 7'... in a row, facing each other by a connecting piece 7b.
engagement holes 8', which are arranged along the longitudinal direction of the movable link pieces 8 and which can match the engagement holes 7';
The locking pin 9 is passed through one of the locking pins 8' and the engagement hole 7' at the tip of the link base 7, so that its length can be adjusted as desired. The engaging hole 8' at the tip of the movable link piece 8 protruding from the base 7 is provided with a connecting pin 10 and a fixing pin 11 for preventing the connecting pin 10 from coming off. It is possible to connect them.

On the other hand, as shown in FIGS. 4 and 5, the connecting body 5 includes a sheath-shaped fixing body 12 with a rectangular cross section, which is attached to the lower frame 2b of the working machine 2 by appropriate fixing means, and a sheath-like fixing body 12 with a square cross section. An engaging pin 13 is slidably inserted into the lower link 4 and can be engaged with the attachment hole 4' at the attachment end of the lower link 4 on the side surface of its tip (left end side in the figure).
It is movably supported by a movable connecting piece 14 having a shape and a support 15 having a hat-shaped cross section attached to the side surface of the fixed main body 12, and by the repulsive force of a compression spring 16, which is an elastic means. It is composed of a locking holder 17 that always comes into contact with the movable connecting piece 14 through a window hole 12' provided in the fixed body 12, and an engagement groove 14' provided in the movable connecting piece 14,
In the state in which the locking holder 17 is engaged, the movable connecting piece 14 is fixedly held. As shown in FIG. 6, the locking holder 17 is formed by forming a neck portion 17c in a part of a shaft body 17b having a link-shaped head 17a.
E-ring 18 that is attached to c, and the support 15
By the repulsive force of the compression spring 16 interposed between the connecting piece 14, the connecting piece 14 is constantly pressed in a direction in which it can engage with the engagement difference 14' of the movable connecting piece 14. Reference numeral 19 denotes a stopper pin protruding from the side opposite to the engagement pin 13 of the movable connecting piece 14, and this stopper pin 19 engages with the fixed body 12 to prevent the movable connecting piece 14 from coming off. It's becoming like that.

In the connection structure of this invention configured as described above, the locking holder 17 of the connection body 5 is engaged with the engagement groove 14' of the movable connection piece 14 against the repulsive force of the compression spring 16. , so that the movable connecting piece 14 can freely slide against the fixed body 12 on the working machine side, and when it is fully extended, it is inserted into the attachment hole 4 at the attachment side end of the lower link 4. ′,
After the engagement pin 13 is inserted and engaged, the locking holder 17 is automatically moved by reversing the tractor 1 or moving the working machine 2 toward the tractor.
due to the repulsive force of the compression spring 16, the engagement groove 14'
The lower link 4 and the working machine 2 can be connected to each other. After this connection work, if the upper link 3 is adjusted to an appropriate length and connected to the side frame 2a of the working machine 2 using the connecting pin 10, the working machine 2 is moved by these links 3 and 4. , is connected and mounted on the rear end of the tractor 1.

[Effect of idea]

As explained above, according to the connection structure of this invention, the connection position can be freely adjusted when mounting a work implement on a tractor.
Not only can the connection work be performed quickly and easily, but it also allows for different mounting configurations, such as moving the load of the work equipment forward,
Its utility value is remarkable.

[Brief explanation of the drawing]

Figure 1 is a schematic side view of a working machine mounted on a tractor using the connection structure of this invention, Figure 2 is a perspective view showing the connection structure of this invention, and Figure 3 is an exploded view of the upper link in this invention. FIG. 4 is a perspective view showing an example of a connecting body in this invention, FIG. 5 is a plan view thereof, and FIG. 6 is a front view of a locking and holding front body constituting the connecting body. In the figure, 3... upper link, 4... lower link, 5... connecting body, 7... link base, 7'...
...Engagement hole, 8...Movable link piece, 8'...Engagement hole,
9... Locking pin, 10... Connecting pin, 12... Fixed body, 12'... Window hole, 13, 13'... Engaging pin, 14... Movable connecting piece, 14'... Engaging groove ,1
4a... Engaging portion, 16... Compression spring (elastic means),
17... It is a locking holder.

Claims (1)

[Scope of utility model registration request] One upper link that can be raised and lowered protrudes rearward from the upper center of the rear end of the tractor, and two lower links that can be raised and lowered, respectively, that protrude from downwardly symmetrical positions on the left and right with respect to this upper link. In a tractor in which a working machine is mounted at the rear of the tractor, the upper link 3 is pivotally supported at the upper rear end of the tractor so as to be able to rise and fall, and two link pieces 7a, 7a are formed facing each other to form a plurality of link pieces. Engagement hole 7'
a link base 7 arranged in a longitudinal direction, a movable link piece 8 inserted between the link pieces 7a, 7a of this link base 7, and an engagement hole 8' arranged in a longitudinal direction in this movable link piece 8. and said link base 7
and a locking pin 9 passing through one of the engagement holes 7' of the link pieces 7a, 7a, and two connecting bodies 5 that control the connection between the lower links 4, 4 and the working machine.
a sheath-like fixed body 12 to be attached to the lower frame of the working machine; and a sheath-like fixed body 12 that is slidably inserted into the fixed body 12 and attached to the side of the tip of the fixed body 12 at the attachment side end of the lower links 4, 4. A movable connecting piece 14 protruding from a connecting engagement pin 13 and a support 15 attached to the side surface of the fixed main body 12 are provided with a compression spring 16 to constantly close the window hole 1 of the fixed main body 12.
2', and a locking holder 17 that is engaged in the engaging groove 14' of the movable connecting piece 14 through the connecting member 2'.