JP2886910B2 - Agricultural tractor leveling equipment - Google Patents

Description

The present invention relates to a support mechanism for a leveling plate that is disposed at a rear portion of a tillage device and is towed when a paddy field is scraped.

(B) Conventional technology Conventionally, a technology for pulling a leveling plate behind a rotary tillage device has been known.

For example, as disclosed in Japanese Utility Model Publication No. 54-22655.

(C) Problems to be Solved by the Invention However, in the above-mentioned prior art, the leveling plate is pivotally supported with respect to the rotary tilling device by left and right links that can only swing up and down. Although it turned up and down, it was impossible to change the position of the leveling plate to the left and right.

As a result, a problem occurred as shown in the prior art drawing of FIG.

That is, the leveling plate passes the shifted position without passing over the portion actually tilled by the rotary tilling device because the leveling plate 63 'passes directly behind the tilling width of the rotary tilling device. There was a defect.

That is, in FIG. 2, the rotary tilling device plows the right portion, but the cultivated soil is thrown in the direction of rotation of the tilling nail, so that it is thrown right behind, and the inside of the turning radius is It is left as a recess m in which the soil is reduced.

Conversely, the outer side of the turning radius is moved outward by hooking the soil by the leveling plate 63 ', and the throwing direction of the tilling apparatus main body is also outward, so that it remains as a convex portion n.

FIG. 15 shows a state in which a concave portion m on the inside of the turning radius and a convex portion n on the outside of the turning radius remain according to the prior art.

The present invention is configured to eliminate the concave portion m on the inside portion of the turning radius and the convex portion n on the outside portion of the turning radius.

(D) Means for Solving the Problem The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

Backward from the cultivation cover 52 constituting the cultivation device body R,
Two leveling plate suspension rods 62 are protruded, and the leveling plate suspension rods 62, 62 are provided.
In addition, the upper ends of the rotating links 51L and 51R are pivotally supported so as to be vertically rotatable and horizontally rotatable.
At the rear end of 2,62, support the upper ends of the left and right repression devices 61,61,
The lower ends of the left and right rotating links 51L, 51R and the lower ends of the repression devices 61, 61 are pivotally supported on the ground plate 63 via a ball joint 90,
During turning tilling of the tractor, the leveling plate 63 positioned in the horizontal direction moves toward the inside of the turning radius with respect to the tilling apparatus main body R, and the left and right ends can be tilted up and down.

(E) Embodiment The problems to be solved and means for solving the problems of the present invention are as described above. Next, the configuration of the embodiment shown in the accompanying drawings will be described.

In the present invention, as shown in the plan view of FIG.
And a leveling plate 63 disposed at the rear of the tiller main body R.
Are pivotally supported by two left and right rotation links 51L and 51R so that the rotation can be made up and down and left and right.

Conventionally, as shown in FIG. 2, the leveling plate 63 'can be pivoted up and down at the rear part of the tilling apparatus main body R, but cannot pivot to the left and right.

And, between the leveling plates 63 of the tillage device main body R, the rotating links 51L, 51R pivotally supported vertically rotatable and horizontally rotatable,
As shown in FIGS. 4 and 5, in a plan view, they are arranged in an inverted C shape.

By arranging the rotating links 51L and 51R in a “reverse C-shape” as described above, as shown in FIG. 5, when the tractor turns right, the leveling plate 63 moves to the right by the distance t, and Is set backward and the left side is set forward and the posture is inclined by the angle α.

When the tractor turns left, it is natural that the posture is opposite to that shown in FIG.

The reason for taking the attitude of the distance t and the angle α in this manner is that the rotating links 51L and 51R are formed in a “reverse C-shape”, but the present invention is not limited to this. , A certain distance t and an angle α are taken.

Next, FIG. 3, FIG. 6, FIG. 7, FIG. 8, and FIG. 9 will be described.

A quick hitch 75 is attached by the lower link 86, 86 and the top link 77 of the tractor.
, The eight-frame 76 of the cultivator main body R can be mounted with one touch.

The tilling apparatus main body R is composed of a front stand 57, a tilling cover 52, a rubber dripping 69, and a tilling transmission case 78. Power is transmitted from the rotary box 58 to the tilling transmission case 78, and the tilling claw shaft 70 is It is driving.

A large number of claw insertion portions 71 protrude from the tilling claw shaft 70, and tilling claws 1 to 47 are inserted and fixed. The mounting state of the tilling claws 1 to 47 is shown in FIGS. 10 and 11.

Rearward of the tillage cover 52 of the tillage device main body R, two grounding plate hanging rods 62 are protruded, and the upper ends of the pivoting links 51L and 51R, which are essential parts of the present invention, are provided on the grounding plate hanging rod 62. Are pivotally supported so as to be vertically rotatable and horizontally rotatable.

Also, a resilient device support projection 80 is provided at the rear end of the leveling plate suspension rod 62.
And the spring support rod 60 is fitted. The spring support rod 60 is provided with a pressing device 61 interposed therebetween, and the pressing device 61 controls the leveling plate.
The entirety of 63 is pressed downward.

Further, a bracket 81 protrudes from a central portion of the leveling plate 63, and a link 53 is interposed in the bracket 81. The link 53 is linked to a leveling plate attitude changing lever 56 via a rotating arm 54 and further via a link 55.

When the leveling plate attitude changing lever 56 is in the position indicated by the solid line in FIG. 3, the leveling plate 63 is in the leveling position when scraping, and when the lever 56 ′ is in the position, the soil is removed to move the soil in the field. It is the posture of the state.

The change of the attitude of the leveling plate 63 by the leveling plate attitude change lever 56 is performed by the rotation of the leveling plate 63 about the pivoting horizontal rod 65. At the time of this rotation, the compression device 61 is compressed.

The configuration of the pivoting horizontal rod 65 is disclosed in FIGS. 6 and 9, and the pivoting arm 68 projects forward from the pivoting horizontal rod 65. Two left and right rotation links 51L and 51R and two left and right spring support rods 60L and 60R are pivotally supported.

Lower ends of the rotating links 51L, 51R, and spring support rods 60L, 60R
The lower end of the ball joint as shown in FIG.
It is pivotally supported by 90 on a pivot shaft of the pivot arm 68, and the leveling plate 63 is configured to be able to rotate vertically and horizontally.

Leveling plate 6 on arms 66 and 67 projecting rearward from pivot horizontal rod 65
3 is fixed.

At the rear end of the leveling plate 63, a large number of plowing plates 64 protrude downward. The plowing plate 64 is used to plow the cut straw or the like protruding from the paddy field.

Also, the leveling plate 63 has square pipe sections 63a on the left and right,
Its strength has been improved.

 Next, FIGS. 10 to 14 will be described.

Conventionally, as shown in FIG. 14, the tilling nails 1 to 47 are arranged at substantially equal intervals with respect to the tilling nail shaft 70.

Therefore, the rut recess a formed after the rear wheels 73L, 73R of the tractor has passed is further deepened, and despite the passage of the cultivator body R and the leveling plate 63, the rut after passing the rear wheels 73L, 73R. The problem that the concave portion a remains remains.

On the other hand, in the present invention, as shown in FIG. 10 and FIG. 13, tilling claws 1 to 47 are arranged to return the soil to the part of the rut recess a formed by passing the rear wheels 73L and 73R. 6p without space
Is open.

The tilling claws arranged on the left and right sides of the rutted recess a are configured so that the nails are bent in a direction to bury the soil in the rutted recess a.

In FIGS. 10 and 11, L and R attached to the side of the tilling nails 1 to 47 indicate that a nail having a bent tip of the nail should be mounted and fixed.

Although only four claw insertion portions 71 are shown in the drawing, they are protruded at 47 places on the outer periphery of the tilling claw shaft 70.

(F) Effects of the Invention The present invention is configured as described above, and has the following effects.

First, a rotating link 51 that can rotate vertically and horizontally.
L, 51R supports the leveling plate 63, so if the tractor turns right for turning, the left and right ends of the leveling plate 63 will be lower, and the right side will be higher. Since the pivoting motion is also added, the soil can be moved inward in the turning direction by the vertical rotation of the left and right ends, and the soil can be transported from the convex portion n in the direction of the concave portion m. is there. As a result, the leveling effect could be improved.

Second, the tillage device main body R and the leveling plate 63 are
The pivoting links 51L, 51R pivotally support the tractor so that the grading plate 63 moves toward the inside of the turning radius and tilts with respect to the cultivator main body R when turning the tractor. Even if the device main body R is swung to the outside of the turning radius by the turning of the tractor, the ground leveling plate 63 is not rotated.
By 51R, it can be left inside, so the concave part m of the inside of the turning radius and the convex part n of the outside of the turning radius that occurred in the case of the conventional method of supporting the ground leveling plate could be erased. is there.

Third, a pressure suppression device is provided between the tillage device main body R and the leveling plate 63.
Since the 61 is interposed, the leveling plate 63 moves inward when the tractor turns, but when the tractor returns straight, the leveling plate 63 also gets help from the repressing device 61 and quickly moves to the position directly behind the tilling device main body R. Return.

In addition, even when the leveling plate 63 moves inward and tilts, the pressing device 61 presses the leveling plate 63, so that the pressing device 61 urges the soil surface, and in the case of normal leveling, the finished state is reduced. It has improved.

Fourth, the left and right two rotating links 51L, 51R and the repressing devices 61, 61 are interposed between the tillage device main body R and the ground level 63. Since two leveling plate suspension rods 62, 62 protruding rearward are provided, by supporting the upper ends of the rotating links 51L, 51R and the repressing devices 61, 61 on the leveling plate suspension rod 62, As a result, the configurations of the upper ends of the pivot links 51L, 51R and the resilient devices 61, 61 can be simplified.

[Brief description of the drawings]

FIG. 1 is a plan view showing a farm tractor leveling device of the present invention, FIG. 2 is a plan view showing a conventional farm tractor leveling device, FIG. 3 is a side view of a farm tractor leveling device of the present invention, FIG. FIG. 4 is a plan view showing the attitude of the leveling plate 63 when the tractor is in a straight-ahead state, FIG. 5 is a plan view showing the attitude of the leveling plate 63 when the tractor is turning right, and FIG. Fig. 7, Fig. 7 is the same rear view, Fig. 8 is a family view of the leveling plate 63, Fig. 9 is a side view of the pivoting horizontal rod 65, and Fig. 10 is the arrangement of the claws of the cultivator main body R. Plan view shown, FIG. 11 is a side view, FIG. 12 is a rear view of a rut recess a formed by rear wheels 73L and 73R of the tractor, FIG. 13 is a rear view showing an arrangement of a tilling claw with respect to the rut recess a, FIG. 14 is a rear view showing the arrangement of the conventional tillage claws, and FIG. 15 is a cross-sectional view of the soil showing the state of occurrence of a problem caused by the conventional ground-fixing claws 63 '. R: tillage device main body m: concave portion n: convex portion 51L, 51R: rotating link 61: resilient device 63: leveling plate

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) A01B 35/04 A01B 49/00-49/04

Claims (1)

(57) [Claims] 1. Two tillers hanging rods 62 project rearwardly from a tiller cover 52 constituting a tiller main body R, and the tillers suspending rods 62, 62 have rotating links 51L, 51R. The upper end is vertically rotatable and pivotally supported so as to be rotatable left and right.Furthermore, the rear ends of the leveling plate suspension rods 62, 62 support the upper ends of the left and right repression devices 61, 61, Lower ends of the rotating links 51L, 51R and the resilient devices 61,
The lower end of 61 is pivotally supported on the leveling plate 63 via the ball joint 90, and the leveling plate 63 positioned horizontally moves toward the inside of the turning radius with respect to the cultivator main body R during the turning tilling of the tractor. And a right and left end can be tilted up and down.