JPH0715364Y2 - Reversible plow level adjuster - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a horizontal level adjusting device for a reversible plow, and more specifically, it stops rotation of a rotary frame according to work depending on the width of a tread of a tractor and the depth of working depth. The present invention relates to a level adjusting device for a reversible plow, which can be adjusted while visually observing the adjustment amount of a level adjusting device provided on the mast frame so as to match the position with a level adjusting quick reference table attached to the mast frame.

[Conventional technology]

The well-known reversible plow is a mast frame attached to the tractor's three-point link, and a rotating frame with bottoms symmetrically attached is rotatably attached.
By using the bottom on one side of the upper and lower sides to perform the forward stroke work, rotating the rotary frame about half a turn to switch the bottom and perform the backward stroke work, reciprocal plowing can be performed.

Further, in plow work in which a plow is attached to the three-point link of the tractor, one side of the wheel of the tractor is dropped into the gravel groove, and therefore the plow itself is set horizontally on the work surface on a flat ground. However, during the work, the tractor takes a tilted posture with the clearance groove side lowered, so that the plow also tilts. This inclination is smaller as the tread of the tractor is larger, and is larger as the groove is deeper.

Therefore, in the above-mentioned reversible plow, prior to the plow work, the rotation stop position of the rotating frame of the reversible plow is adjusted from the relationship between the tread of the tractor and the working depth so that the horizontal level of the plow during work is parallel to the field scene (horizontal Adjustment work is required to ensure that

Therefore, conventionally, as shown in FIG. 5, a guide member 2 having an internal thread portion is attached to a mast frame 1 via a bracket 32.
The adjusting rod 3 having a male screw portion is screwed into the shaft, and the lower end 3A of the adjusting rod penetrating the guide member 2 is displaced vertically with respect to the guide member by turning the level handle 3B provided on the upper part of the adjusting rod. A level adjusting device which makes it possible to adjust the rotation stop position of the rotary frame by bringing the lower end 3A into contact with the stopper 5A of the rotary frame 5 which is rotatable by expanding and contracting the hydraulic cylinder 4 with respect to the mast frame 1. Even if the tractor is tilted in the field scene during work, the plow can be kept horizontal with respect to the field scene.

In the level adjusting work as described above, the screwing amount of the adjusting rod 3 is determined from the relationship between the tread of the tractor and the working depth by referring to the separately prepared table for adjusting the level, and as shown in FIG. The height H of the adjusting rod 3 protruding above the guide member 2 is adjusted to a set screwing amount while measuring with a steel tape measure or the like.

[Problems to be solved by the device]

However, in order to measure the height H of the adjusting rod 3 protruding above the guide member 2, a measuring instrument such as a steel tape measure is required, and if this measuring instrument is in a familiar place, there is no problem,
Even if it is mounted on the tractor, it is troublesome to get the steel tape measure, and it may be lost while it is mounted on the tractor for a long time. It was often done to determine the screw-in amount.

Therefore, there is a problem that the plow level cannot be adjusted accurately and the plow work cannot be performed properly.

In view of this, the present invention is intended to enable accurate adjustment work without requiring a measuring instrument such as a steel tape measure in the level adjustment work.

[Means for Solving the Problems]

In order to solve the above problems, the present invention is a reversible plow in which a rotating frame rotatably attached to a mast frame is vertically symmetrically equipped with a bottom, and the tubular shape is attached to the mast frame. Of the guide member and an adjusting rod screwed into the guide member so as to penetrate through the cylinder, and the lower end of which is vertically displaceable by adjusting the amount of screwing into the guide member. By contacting the lower end of the rotary frame with the stopper of the rotary frame, the rotation adjusting position of the rotary frame with respect to the mast frame can be adjusted to adjust the horizontal level of the plow. On the upper side of the member, there is a cylindrical level gauge that is loosely fitted to the adjusting rod protruding from the upper side of the guide member. However, the level of the adjustment rod can be adjusted while adjusting the amount of screwing into the guide member with the scale of the level gauge, while adjusting the level to the adjustment amount set based on the width of the tread of the tractor and the depth of the working depth. is there.

[Action]

In the level adjusting device of the present invention, a cylindrical level gauge is provided on the upper side of the guide member by loosely fitting the adjusting rod protruding from the upper side of the guide member, and the screwing amount of the adjusting rod with respect to the guide member is graduated on the level gauge. It can be adjusted while visually observing. Therefore, the screwing amount of the adjusting rod can be immediately and accurately adjusted to the set amount at the working position without using a measuring instrument such as a steel tape measure.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 4 of the accompanying drawings. Symbols in these figures
10 indicates the entire reversible plow, mast frame 11
A rotating frame 21 is rotatably attached to the hydraulic cylinder 12, and the rotating frame 21 can be rotated by expanding and contracting the hydraulic cylinder 12. A rear frame 40, which is mounted on the rotary frame 21 and extends rearward, is vertically symmetrically mounted with a bottom 22 for left reversal and a bottom 23 for right reversal.

Further, the level adjusting device 30 is arranged at the left and right symmetrical positions around the mast 11A in the mast frame 11, and the level adjusting device 30 has a tubular guide member 31 having a relatively long female screw portion. The flat bracket 32 is used so that the central axis of the screw hole is oriented vertically.
The center of the guide member projects from the mast frame 11 and exists in the rotation region of the rotation shaft of the rotation frame 21.

On the upper side of the guide member 31, there is provided a cylindrical level gauge 33 into which an adjusting rod 35 having a male screw portion described later can be inserted. The level gauge 33, which is loosely fitted to the adjusting rod 35, has vertical slit-shaped window holes 33A at two locations on the peripheral surface, and the upper portion of the adjusting rod 35 is provided through the window holes 33A. Is provided with a level handle 36. Further, the level gauge 33 is provided with scales 34 on both sides of the window hole 33A for adjusting the level along the length direction. The scale 34 is composed of a scale 34A that is long in the circumferential direction and a short scale 34B that is provided in the middle of the long scale 34A, and the long scale 34A is provided with numerical scale numbers 34X.

An adjusting rod 35 having a male screw portion in a female screw portion is screwed into the tubular guide member 31, and the lower end of the adjusting rod 35 is
35A contacts the stopper 21A of the rotating frame 21. Further, a level handle 36 for screwing the adjusting rod 35 is provided on the upper end portion 35B of the adjusting rod 35 via a window hole 33A so that it can rotate together with the cylindrical level gauge 33.

Then, prior to the plow operation, the level angle θ is determined for the left inverted and the right inverted bottoms based on the relationship between the tread of the tractor and the working depth. That is, in the level adjustment chart, a number corresponding to the scale number 34X of the cylindrical level gauge 33 is determined from the relationship between the tread and the working depth, the adjusting rod 35 is screwed into the guide member 31, and the head portion 35B thereof is Is adjusted to the above-specified number on the scale 34, the lower end 35A of the adjusting rod 35 is projected from the guide member 31, and the lower end 35A of the adjusting rod 35 determines the rotation stop position of the rotary frame 21, and the level angle θ
Adjust.

As described above, the adjusting rod 35 is screwed along the guide member 31 inside the cylindrical level gauge 33 loosely fitted to the adjusting rod 35, and the position of the head which is the upper end portion 35B of the adjusting rod 35 is adjusted. By measuring with the scale of the level gauge, it is possible to set the level angle θ suitable for plow work without using a measuring instrument such as a steel tape measure. In this case, the adjusting rod 35 is rotated by turning the level handle 36 protruding from the outside of the cylindrical level gauge 33.
While turning 33 around, the level handle 36 moves up and down along the slit-shaped window 33A and can be screwed in without interference.

[Effect of device]

As is apparent from the above description, according to the level adjusting device of the present invention, a cylindrical level gauge is provided on the upper side of the guide member so as to be loosely fitted to the adjusting rod protruding from the upper side of the guide member. Since the amount of screwing into the guide member can be adjusted while visually observing the scale of the level gauge, the amount of screwing of the adjusting rod can be set immediately at the working position without using a measuring instrument such as a steel tape measure. The amount can be adjusted precisely, which is extremely convenient for adjusting the horizontal level of the reversible plow.

[Brief description of drawings]

FIG. 1 is a schematic explanatory front view of a reversible plow level adjusting device according to the present invention, FIG. 2 is an explanatory rear view of a working state, FIG. 3 is a side view showing the device, and FIG. 4 is an exploded explanatory view of the same. FIG. 5 is a partial perspective view of a conventional level adjusting device, FIG.
The figure is also an explanatory view of level adjustment by a conventional level adjusting device. 10 ... Reversible plow, 11 ... Mast frame, 12 ... Hydraulic cylinder, 21 ... Rotating frame, 21A ... Stopper, 22 ...
Left bottom, 23 ... Right bottom, 30 ... Level adjusting device, 31 ... Guide member, 32 ... Bracket, 33 ... Level gauge, 34, 34
A, 34B ... Scale, 35 ... Adjustment rod, 35A ... Lower end, 35B ... Upper end, 3
6 ... Level gauge, 40 ... Rear frame.

Claims (1)

[Scope of utility model registration request] 1. A reversible plow in which a rotating frame rotatably attached to a mast frame is vertically symmetrically provided with a bottom, and a tubular guide member attached to the mast frame and the guide member. Screwed so as to penetrate the inside of the cylinder, and the lower end of the adjusting rod is vertically displaceable by adjusting the screwing amount with respect to the guide member.The lower end of the adjusting rod contacts the stopper of the rotating frame. In the level adjusting device, which adjusts the horizontal level of the plow by adjusting the rotation stop position of the rotating frame with respect to the mast frame, the level adjusting device is provided above the guide member and from above the guide member. A cylindrical level gauge that is loosely fitted to the protruding adjustment rod is provided, and A level adjusting device for a reversible plow, characterized in that it is possible to adjust the level of adjustment to the adjustment amount set from the breadth of the tread of the tractor and the depth of the plowing depth while observing the mixing amount with the scale of the level gauge.