JPS6233785Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improved structure of a plow device for removing earth and sand which is used in combination with a loading platform connected to the rear of an agricultural tractor via a three-point linkage mechanism.

As this type of device, for example,
As can be seen in Publication No. 53-147506, etc., the plow can be rotated about a single axis by operating the handle, and only the position of the cutting edge can be moved away from the ground as appropriate, or It is already widely known that the state of attachment of the plow to the loading platform can be changed by changing the attachment and detachment of the plow shaft fulcrum each time and changing the position of the entire plow. However, in the case of these conventional models, the P.
The outer shape of the TO shaft and gear casing cover etc. become obstacles, making it impossible to change the plow position freely. Therefore, if the entire loading platform is raised using the three-point linkage mechanism, it will come into contact with the previous obstacle. Therefore, it is unavoidable to raise the entire loading platform so that it is tilted forward, and work while restraining the rise of the plow and being careful not to contact the plow with these obstacles. The position of the shaft support had to be changed each time the work was interrupted, and then the desired work purpose had to be achieved.
Therefore, conventional devices not only hinder work efficiency, but also have the risk of damaging mechanical parts and harming workers.

Therefore, in this invention, a plow device with an improved structure as described in detail below has been developed and completed in order to deal with the drawbacks of the previous ones.

As can be understood from the representative embodiment shown in the drawings, this invention includes a connection part that can be attached and detached from the support frame 1 of the loading platform B, and a connection part between the connection part and the back surface of the plow 2 for scooping earth and sand. It basically consists of an upper connecting rod 3 and a lower connecting rod 4 that are connected to form a linkage, and a rotation shaft 6 that is linked to a plow storage handle 7 for raising and lowering the plow 2.

In the illustrated embodiment, the connection portion to the support frame 1 is formed by fixing bolts 13, 13,... implanted in the support frame 1, and bolt insertion holes 51, 51,... that fit into the fixing bolts 13, 13,... This is realized by the connecting plate 5 that is On the upper side between this connecting plate 5 and the plow 2 which is arranged diagonally downward at a predetermined distance from the front side, one end is attached to the back surface of the plow 2 and the other end is attached to the connecting plate 5, respectively. A pair of upper connecting rods 3,
3 is provided, and one end is provided with a plow 2 on the lower side.
A lower connecting rod 4, the other end of which is pivotally connected to the connecting plate 5, is provided at a suitable position on the side of the reinforcing plate 21 formed on the back surface of the reinforcing plate 21. , 4 constitutes a four-piece linkage with the reinforcing plate 5 side pivoting parts of the upper and lower connecting rods 3 and 4 as the fixing point, and the reinforcing plate 5
In contrast, the plow 2 is configured to be able to move from diagonally downward in the front to upward and rearward, making it possible to change the position of the plow 2 from the state shown by the dotted line in FIG. 2 to the state shown by the solid line. At this time, both upper and lower connecting rods 3 and 4
By appropriately selecting and adopting the length relationship and the distance between the pivot points, the posture of the plow 2 during movement can be optimized. For example, in the illustrated embodiment, the upper connecting rods 3, 3 are made slightly longer than the lower connecting rod 4, and the space between the pivot joints on the plow 2 side is made slightly wider.
When the plow 2 is moved upward and rearward, the plow 2
Here is an example in which the posture of the plow is steeper than the original state, making it easier to avoid contact between the plow 2 and the protruding object at the rear of the agricultural tractor, and making it easier for soil and sand remaining on the surface of the plow 2 to fall. It shows.
In addition to the above-mentioned embodiment, the structure of this connection part is such that the connection plate 5 is omitted and one end of each of the upper and lower connecting rods 3 and 4 is connected to the front lower rod 1 of the support frame 1.
Of course, it is also possible to form a pivot joint by directly attaching and detaching the supporting frame 1 to the supporting frame 1, but in this case, it is easier to attach and detach the support frame 1 than in the above embodiment using the reinforcing plate 5. I can't deny the regret that things have become complicated.

On the other hand, a rotating rod 61 is formed at one end of the rotating shaft 6 provided along the lower front rod 12 of the support frame 1 so as to be parallel to the reinforcing plate 21 on the back surface of the plow 2, and a crank is provided at the other end. A piece 62 is formed, and the tip of the crank piece 62 is attached to the front upper rod 1 of the support frame 1.
It is pivotally connected to the lower end of a tie rod 71 extending from the plow storage handle 7 formed in 1. The rotating rod 61 formed at one end of the rotating shaft 6 has an abutting piece 62 at its tip. 62 pushes up the plow 2 while contacting the back side of the plow 2. Although not shown in the drawings, the same function can be achieved by fixing and interlocking one end of the rotating shaft 6 directly to either the upper or lower connecting rods 3 and 4 in place of the rotating rod 61. .

With the above-mentioned construction, the plow device of this invention is formed on the front of the loading platform B, and the state in which it is connected to the rear of the agricultural tractor M via a three-point linkage mechanism R is shown in the central sectional view of FIG.
In this illustrated embodiment, the plow 2 is positioned diagonally below the front of the support frame 1 to scoop up the soil E into the loading platform B, and by moving the agricultural tractor M forward, the soil E is scooped up along the inclined surface of the plow 2 and gradually piled up in the loading platform B. When the loading platform B is filled with the scooped soil, the lift arm of the agricultural tractor M is operated to raise the loading platform B connected to the three-point link mechanism R, and the platform B is moved to a location required for discharging the soil while being kept at a suitable height from the ground. When the loading platform B is raised, the plow 2 is first moved upward to the rear of the support frame 1 by operating the plow storage handle 7, and the plow 2 is stored in the state shown by the dotted line to the solid line in Fig. 2. If the loading platform B is then raised, the blade of the plow 2 will not come into contact with obstacles such as protruding parts at the rear of the agricultural tractor, and the work of scooping, transporting, and discharging the soil can be smoothly performed.

Note that the cross-sectional view shown in FIG. 4 shows that the series of operations described above is not performed manually, that is, the plow 2 is automatically moved and stored in the process of raising the loading platform B, rather than being operated by the handle 7 for storing the plow. In this example, the plow storage handle 7 in the previous embodiment is
Instead, a crank rod 8 that is interlocked with the top link of the three-point link mechanism R is formed. In this way, the inclination angle of the top link of the three-point link mechanism R changes as the loading platform B is raised, and the crank lever 8 automatically rotates in accordance with the change. As a result, the plow 2 naturally moves upward and is stored in the upper rear part of the support frame 1.

As mentioned above, according to the plow device for scooping soil of this invention, the plow is placed in front of the loading platform connected via the three-point linkage mechanism at the rear of the agricultural tractor, and the soil is scooped out to the desired location. Not only can the series of operations of discharging the earth and sand after moving up to a certain point be carried out extremely safely and smoothly, but it is also advantageous for attaching and detaching the plow to the front of the loading platform, or automating the storage of the plow. The utility value of the loading platform connected to the tractor will be further increased, and as a result, the operating efficiency of the agricultural tractor itself will be increased, which will have immeasurable significance in terms of farm management.

[Brief explanation of the drawing]

The drawings show a representative embodiment of this invention; FIG. 1 is a perspective view of the entire device looking up from below, FIG. 2 is a side view of the main parts to explain the storage state, and FIG. FIG. 3 is a side view including a partial cross section showing the device in use, and FIG. 4 is a side view showing the device according to another embodiment in an operating state. DESCRIPTION OF SYMBOLS 1...Support frame, 2...Plow, 3...Upper connecting rod, 4...Lower connecting rod, 5...Joining plate, 6
...Rotating shaft, 7...Plow storage handle, 8...
...crank rod, B...carriage bed, E...earth and sand, M...
Agricultural tractor, R...Three-point linkage mechanism.

Claims (1)

[Scope of utility model registration request] A plow facing diagonally downward is disposed in front of a support frame of a loading platform connected to the rear of an agricultural tractor via a three-point link mechanism, and an upper connecting rod and a lower connecting rod are connected between the support frame and the back of the plow. By pivotally connecting both ends of the plow, the plow can be freely moved and stored in the upper rear direction with respect to the support frame, and can be made independent of either the upper or lower connecting rods or separately from the connecting rods. A plow device for removing earth and sand, which consists of a rotary shaft that is linked to a plow storage handle fixed to a rotary rod.