JPS6024083Y2 - Tillage device rear cover - Google Patents

Description

[Detailed description of the invention] Generally, a single flat cover is attached to the rear end of the rotary cover that covers the rotary via a horizontal support shaft (in the width direction of the tractor), and a horizontal support shaft on the rotary case is attached to the rotary cover. The angle-adjustable support rod extending rearward from the shaft is connected to the above-mentioned leveling cover using an adjusting rod, and a coil spring fitted to the adjusting rod presses the leveling cover downward to press and level the soil plowed by the rotary. I try to do that.

In this way, in conventional equipment, the leveling cover was integrated on both the left and right sides of the ridge erector, so if the ridge erector could not divide the tilled soil into the same amount on the left and right sides, the leveling cover could not be used to erect the ridge. There was a problem that only one side of the vessel was leveled, but the lumbosacral side was not leveled.

In this invention, the leveling covers on both sides of the ridge erector are made into separate members and supported on the horizontal support shaft provided at the rear end of the rotary cover, making it possible to perform leveling work separately on the left and right sides. This allows the cover to move up and down smoothly, and will be explained in conjunction with the drawings as follows.

In FIG. 1 showing the left side of the rear part of the tractor, a rotary case 1 supports a plowing rotary 2 at its lower end and transmits rotational force introduced from a waist shaft 3 to the rotary 2.

A rotary cover 4 covering the rotary 2 is attached to the rotary case 1, and a pair of left and right leveling covers 6 are rotatably attached to the rear end (right end in the figure) via a support shaft 5. A pair of left and right leveling covers 6 has a ridge raising device 7 as a second
Sandwich it as shown in the picture.

Each of the left and right leveling covers 6 has a top-opening U-shaped bracket 8 on its upper surface, and a horizontal pin 9 fits into a hole formed in a pair of upright pieces of the bracket 1. A lower end portion of an adjustment rod 10, which will be described later, is connected to.

The front ends of a pair of tail wheel support rods or ridged support rods 13 are supported at the rear of the upper end of the rotary case 1 (right end in the figure) via a horizontal support shaft 12. A bundle 18 is inserted between the joint nut 15 (for example, right-handed thread) at the upper end of the fixed projection 14 and the joint nut 17 (for example, left-hand thread) at the upper end of the projection 16 fixed to the upper end of the rotary case 1.
The bundle 18 is screwed together with the adjust bolt 19 having the
By turning the support rod 13, the support rod 13 can be raised and lowered around the support shaft 12.

The support rod 13 is connected to a front cross rod 21 through a bracket 20, and a rear cross rod 2 with the same rectangular cross section through a bracket 22.
3 are fixed respectively, and the upper end of a strut 25 integrated with the ridge erector 7 is fitted into a mounting pipe 24 fitted to the center of the front horizontal beam 21, and fixed with a set bolt 26. It is.

The support legs 28 of the tail wheel 27 are attached to both left and right ends of the rear horizontal rod 23.

There are U-bolts 30 at the left and right two locations of the front horizontal rod 21, respectively.
A holder 32 is fixed using a nut 31, and as shown in FIG. 3, this holder 32 supports a horizontal support shaft 34 integral with a coupling ring 33 at its front end.

The illustrated holder 32 has a body with a U-shaped cross section that opens downwards, the front end of which is cut out in the earthen wall at a portion 35 so that the coupling ring 33 can be rotated.

The aforementioned adjustment rod 1 is inserted into the central hole 36 of the coupling ring 33.
The middle portion of the ring 33 passes through the ring 33, and upper and lower coil springs 37 and 38 fitted to the adjustment rod 10 are in pressure contact with the upper and lower surfaces of the ring 33.

39 is a washer and 40 is a pin.

Further, the adjustment rod 10 is provided with a plurality of pin holes 41 in order to change the position of the washer 39.

The adjustment rod 10 is set in advance to a length that allows its upper end to pass below the front cross-bar 21 when the holder 32 is removed from the front cross-bar 21 and the leveling cover 6 is lowered. It is a rule.

The holder 32 is made to protrude forward (to the left in the figure) from the front horizontal rod 21, and the adjustment rod 10 is connected to the joint ring 33 at the front end of the holder 32.
When supporting the middle part of the (A state), the angle α between the adjustment rod 10 and the leveling cover 6 becomes small, the spring force against the leveling cover 6 can be weakened, and the rotary 2 The excavated soil can be pressed flexibly and soft soil can be leveled more ideally.

Release the nut 31 from the front crossbar 21 to release the outer waist holder 32, lower the leveling cover 6, move the upper end of the adjustment rod 10 below the front crossbar 21 (f), and move the When the holder 32 is attached to the rear side beam 23 with the U-bolt 30 on the rear side of the section side beam 21 and the adjustment rod 10 is held in the position shown by the two-dot chain line, the adjustment rod 10 is approximately perpendicular to the leveling cover 6. It is possible to maintain a stable posture (B state).

In this state B, the spring force can be increased against the leveling cover 6,
Even hard soil can be forcefully leveled.

If the rear cross-bar 23 is not used, change the mounting position of the holder 32 to the front cross-bar 21 to move forward or backward, that is, make the holder 32 protrude rearward (to the right in Figure 1) from the front cross-bar 21 and adjust. It is also possible to maintain the rod 10 in approximately the B state.

Of course, the elasticity of the coil spring 38 can be changed in both states A and B by using the bottle hole 41 as in the conventional case.

The left and right leveling covers 6.6 level the cultivated soil raised on both sides of the ridge erector 7 by the ridge erector 7 according to the amount.

In many cases, the ridge maker 7 cannot divide the tilled soil into the same amount on the left and right sides, but even in such cases, the left and right leveling covers act separately on the left and right sides, so it is always possible to evenly level the left and right sides, and only one side can be leveled. Problems such as one side being leveled and not leveled on the other side do not occur.

As explained above, in the present invention, the left and right leveling covers 6.6 are separately supported on the rear end of the rotary cover 4 via the horizontal support shaft 5, and the horizontal The ridge-type support rod 21 is extended rearward from the support shaft 12 of the ridge-type support rod 21. The ridge-up device 7 attached to this ridge-type support rod has a pair of left and right holders 32 attached to and detached from the horizontal rods 21 and 23 for fixing the tail wheel 27. Each holder 32 supports a joint ring 33 rotatably around a horizontal ring support shaft 34, and the lower end of the adjustment rod 10 is connected to a horizontal pin 9 on each leveling cover 6.6. Then, the middle part of each adjustment rod 10 is passed through the support hole 36 of the joint ring 33, and the coil spring 38 is inserted between the joint ring 33 and the spring receiver (washer 39) on the adjustment rod 10 below.
Because of the reduced construction, even if the tilled soil cannot be divided into the same amount on the left and right sides of the ridge erector 7, the leveling cover 6.6 acts separately on the left and right sides, so it can always be leveled evenly on the left and right sides. It is possible to reliably prevent the problem of one side being leveled but not the other.

It also has the following advantages:

(a) Since the middle part of the adjustment rod 10 is supported by the joint ring 33 which is rotatable around the horizontal ring support shaft 34, even if the rod 10 moves as the leveling cover 6 moves up and down. , the rod 10 is not twisted relative to the coupling ring 33 and slides smoothly within the support hole 36.

That is, there is no fear that the rod 10 or the joint ring 33 will be damaged or deformed due to twisting or the like.

(b) The holder 32 is detachably attached to the horizontal rod 21 for fixing the ridge type or the horizontal rod 23 for fixing the tail wheel, and the coupling ring 33 is rotatable around the support shaft 34. , the holder 32 can be selectively attached to both transverse rods 21° 23, thereby allowing the leveling cover 6 and the
By changing the angle α between 7110 and 7110, the spring force on the waist leveling cover 6 can be changed.

That is, the spring force applied to the leveling cover 6 can be changed according to the hardness of the soil without changing the type of spring 38 or the insertion position of the pin 40.

To explain in more detail, it is provided with a front transverse rod 21 for fixing the ridge type, and a rear transverse rod 23 for fixing the tail wheel which has the same cross section and is located behind it, and the holder 3 is attached to both transverse rods 21 and 23.
2 is replaceable, by replacing the holder 32, the angle α between the leveling cover 6 and the rod 10 can be changed, and the spring force applied to the leveling cover 6 can be changed.

In other words, the pin hole 41 is used as a manual cutter to change the spring force.
In addition to the means of utilizing the holder 32, a means of changing the horizontal rod to which the holder 32 is attached is also added, which is extremely practical.

(C) Furthermore, the holder 32 is shaped to extend in the front-rear direction, and the joint ring 33 is rotatably supported at the lumbosacral end via the ring support shaft 34 so that one end of the holder 32 is attached to the transverse rod 21, etc. Since the position of the holder 32 can be changed freely between a forward protruding state where the joint ring 33 is in front of the horizontal rod 21 and a rearward protruding state where the joint ring 33 is rearward, the mounting of the holder 32 can be done evenly by changing the position. cover 6 and 071
By changing the angle α between 10 and 10, the spring force on the leveling cover 6 can be changed.

That is, as a means of changing the spring force, the pin hole 41 is used as a conventional means.
In addition to the method of changing the horizontal rod on which the holder 32 is attached as described above, it is also possible to use a means of changing the posture when attaching the holder 32 to one horizontal rod 21, so that the spring force is transferred to the soil. Depending on the hardness or softness, it can be changed in a very wide range by various changing means, and has very high practical value.

[Brief explanation of drawings]

FIG. 1 is a schematic view of the rear left side of an agricultural tractor to which the present invention is applied, FIG. 2 is a schematic view of FIG. 1... Rotary case, 4... Mountain-tally cover 5... Support shaft, 6... Leveling cover, 9... Pin, 10 ...Adjustment rod, 12... Support shaft, 13 Support rod, 21.23.
...Horizontal rod, 27...Tail wheel, 32...
...Holder, 36...Hole, 38...
Coil spring, 39...Washer (spring holder).

Claims (1)

[Scope of utility model registration request] Separate left and right leveling covers 6.6 are supported at the rear end of the rotary cover 4 via a horizontal support shaft 5, and a furrow device support rod 13 is connected rearward from a horizontal support shaft 12 on the rotary case 1. A pair of left and right holders 32 extending in the front and rear direction are attached to the front horizontal rod 21 for fixing the furrowing device attached to the support rod 13.
One end of each holder 32 is detachably attached, and the other end of each holder 32 rotatably supports a coupling ring 33 via a horizontal ring support shaft 34. The posture can be freely changed between a forward protruding state in which the joint ring 33 is in the front and a rear protruding state in which the joint ring 33 is in the rear.
It can also be replaced with the rear horizontal rod 23 for fixing the tail wheel at the rear, and the adjustment rod 1 is attached to the horizontal pin 9 on each leveling cover 6.
The coil spring 3 is connected between the joint ring 33 and the spring receiver 39 on the lower adjustment rod by passing the middle part of each adjustment rod 10 through the support hole 36 of each joint ring 33.
A cultivating device orchard cover characterized by having a reduced number of 8.