JPS5837204Y2 - Tractor leveling device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a leveling device that is attached to a tractor.

In leveling devices mounted on the rear of a tractor, it is known to mount a further auxiliary leveling plate to the rear of the leveling plate.

The auxiliary leveling plate performs both the function of moving the soil on the surface of the paddy field and the function of leveling the soil on the surface of the paddy field.

If you want to move the soil by scratching it with the auxiliary leveling plate, you can hang the leveling plate in an upright position and then fix it in an immovable state.

That way, you can scrape the ground surface with a fixed leveling plate.

When you want to use this auxiliary leveling plate to flatten the surface of a paddy field, there is no need to take the trouble to turn the leveling plate horizontally.

That is, if you simply release the locking device that fixed it upright and set it in a free state, by towing it, the leveling plate will naturally turn sideways due to the earth pressure.

Therefore, in all known structures, each device consists of a device that can lock the auxiliary leveling plate in an upright position and a device that can release the lock.

However, such devices are unsatisfactory.

This is because the suspended leveling plate is a device that turns sideways when the tractor starts running.
This is because the moment it starts running, the suspended leveling plate digs slightly deeper, making the paddy field uneven.

For the purpose of leveling the surface of the paddy field, an auxiliary leveling plate is used.
Even if it is suspended in a free state, before the tractor moves forward, the auxiliary leveling plate will be slightly deeper due to its own weight.
It is buried in mud.

When the tractor starts running, the auxiliary leveling plate floats up on the muddy soil, but a small portion of it becomes uneven.

A method to improve this defect is to lock the auxiliary leveling plate so that it does not move downward beyond a certain level no matter how it moves downward, but to leave it free to move upward.

To explain with a diagram, 1 is a horizontally long leveling plate attached to the rear of the tractor.

A laterally long auxiliary flat plate 2 is fixed to the rear end of the flat plate 1 via a shaft 5.

Reference numeral 3 designates a protrusion protruding from the upper surface of the auxiliary leveling plate 2.

A lower end of a connecting rod 6 is fixed to a rear portion of the projecting piece 3 by a shaft 4.

The upper end of the connecting rod 6 is fixed to the tip of the link 8 by a shaft 7.

The base of the link 80 is fixed to the main body side by a shaft 9.

A projection 10 is separately fixed to the shaft 7, and a shaft 28 is fixed to the projection 10.
The lower part of the bright part 11 is pivoted.

An insert pin 13 is screwed into the upper part of the bright part 11 and tightened with a fixing screw.

A shaft tube 14 is attached to the upper end of the insert pin 13, and the upper end of the bright part 14 is fixed by a shaft 15 to the tip of a protrusion 16 which is fixed to a fixed rod 18.

The protrusion 16 is fixed to the fixed rod 18 by a screw 1T.

A horizontal rod 26 is attached to the intermediate position of the protrusion 16, but the protrusion 16 is simply fixed to the fixing rod 18 by a screw 17, and as a whole, the auxiliary leveling plate 2 is moved by its own weight.
It is always installed in a drooping state.

Therefore, the auxiliary flat plate 2 has its own weight, and the shaft cylinder 1
4. Each of the six connecting rods is installed so that it always descends from the position shown by the solid line in Figure 1 to the position shown by the phantom line.

A rotating frame 2 is mounted by a shaft 22 at a position slightly below the protrusion 16.
1 is fixed on the shaft.

A bundle 23 is attached to the rotation frame 21.
When 3 is rotated, it rotates from the position shown by the solid line in FIG. 1 to the position shown by the phantom line.

The rotating frame 21 is attached to cover the shaft tube 14, and the stopper 20 is attached to the fixed rod 18 so as to be fixed at right angles to the shaft tube 14.

When the rotating frame 21 is in the position indicated by the solid line in Figure 1, as shown in the enlarged view in Figure 4, the engaging body 25 is attached to pull up the auxiliary leveling plate 2, which descends under its own weight, to the leveling position. It will be done.

The engaging body 25 is fixed integrally with the rotating frame 21, and when the rotating frame 21 rotates as shown in FIG. The leveling plate 2 is pulled up.

However, since the tip 27 of the engaging body 25 simply pushes up the horizontal rod 26 and does not fix it, there is still room for upward movement, and it can move upward to the position shown by the phantom line in FIG.

When the rotating frame 21 rotates to the left in FIG. 4, the tip 27 of the engaging body 25 comes off the horizontal rod 26, and at that moment, the auxiliary leveling plate 2 descends due to its own weight, but it rotates further. When the frame 21 is rotated, the horizontal plate 24 of the rotating frame 21 presses the protrusion 16, as shown in FIG.

In the figure, 19 is a screw, 29 and 31 are projections, 30 is a spring, and 32 is a fixing frame.

Since the present invention is as described above, the bundle 23 is
When the rotation frame 21 is rotated to the position indicated by the solid line in the figure (see Figure 4), the rotation frame 21 stops while leaning on the stopper 20 due to the action of the stopper 20 and the spring 300, and at the same time, the distal end 27 of the engaging body 25 holds the horizontal rod 26. Raise it up, shaft cylinder 14, connecting rod 6
etc., to bring the auxiliary leveling plate 2 into a state where it can level the surface of the paddy field.

However, since the tip 27 of the engaging body 25 only pushes up the horizontal rod 26 from below, if the auxiliary leveling plate 2 wants to move further up in the muddy soil, it can be moved without pressing it. Adapt and move up.

Therefore, when the tractor moves forward, the auxiliary leveling plate 2
The leveling operation can be carried out smoothly from the beginning, and the defect of the known method, which causes the tractor advance start part to be deep, can be corrected.

[Brief explanation of the drawing]

FIG. 1 is a side view, FIG. 2 is a plan view, and FIGS. 3 and 4 are operating state diagrams. Explanation of symbols: 1... Leveling plate, 2... Auxiliary leveling plate, 3... Projecting piece, 4, 5... Shaft, 6... ...Continuous rod, 7...Axis, 8...
...Link, 9...Shaft, 10...Protrusion, 11...Bright part, 12...Fixing screw,
13... Butterfly pin, 14... Shaft cylinder, 15.
...Axis, 16...Protrusion, 17...
・Screw, 18... Fixed rod, 19... Screw, 20... Stopper, 21... Rotating frame, 22... Axis , 23... Bundle, 24... Horizontal plate, 25... Engaging body,
26... Horizontal rod, 27... Tip, 28
...Curved shaft, 29...Protrusion, 30...Spring, 31...Protrusion, 32...Fixed frame.

Claims (1)

[Claims for Utility Model Registration] A leveling device for a tractor comprising a combination of the following requirements A-D. A. The auxiliary flat plate 2 is fixed to the rear end of the main flat plate 1. B. A bundle 23 is attached to the auxiliary leveling plate 2, which can change the leveling plate 2 between a substantially vertical scraping position and a substantially horizontal leveling position. A locking device is attached to the C1 auxiliary leveling plate 2, which can lock the leveling plate 2 in an immovable state when the leveling plate 2 is changed to a substantially vertical scraping position. D. Install a locking device on the auxiliary leveling plate 2 so that when the leveling plate 2 is changed to a substantially horizontal leveling position, it moves upward from the substantially horizontal state but does not move downward from the substantially horizontal state.