JPS593692Y2 - floating device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a floating device for a rotary tiller, and aims to ensure locking and facilitate operation when floating.

In a rotary tilling device equipped with a gauge wheel behind the rotary tiller via a gauge wheel support frame, the gauge wheel becomes an obstacle and makes tilling at the edge of the ridge difficult.
At that time, a so-called floating device is installed which lifts the gauge wheel support frame sufficiently so that the gauge wheel can be placed on the ridge, so that tilling can be started from the position where the rotary tiller is completely brought to the edge of the ridge.

However, conventional floating devices are mechanically very complex, and have problems such as the lock coming off due to impact during tilling, making it impossible to maintain a constant plowing depth. The disadvantage was that the operations during migration were complicated.

The present invention solves these conventional problems, and
The feature is that the gauge wheel support frame is pivoted to the rotary machine frame so that it can move up and down, and the gauge wheel support frame can be adjusted up and down with a plowing depth adjustment rod installed on the rotary machine frame side. , a bending link and an operating link are rotatably supported on a gauge wheel support frame, and a bending link and a connecting fitting of a plowing depth adjustment rod are pivotably connected to a gauge wheel support frame;
A wedge body that is interposed between the bending link and the connecting metal fitting and restrains them so that they cannot be bent is pivotally connected to the actuation link, and the actuation link is rotatable relative to the bending link so that the wedge body can be inserted into and removed from the movement link. A control lever operated in the wedge detachment direction is provided, and the operating link is provided with an engaging portion with which a protrusion on the control lever removably engages so as to hold the bending link in the bending position.

Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments.
The figure shows a rotary tiller for mounting on a tractor, with 1 being a gear case, 2 being a support arm, 3 being a top mast, and 4 being a rotary tiller.
is a support link.

Reference numeral 5 denotes a claw shaft, which is provided with a large number of tilling claws 66, and these claw shafts 5 and tilling claws 6 constitute a rotary tilling section.

7 is a top cover, 8 is a rear cover, and 9 is a side cover.

Reference numeral 10 denotes a gauge wheel support frame, which is pivotally supported on the support arm 2 via a mounting shaft 11 so as to be vertically movable.
Posts 12 are provided on both sides of the rear end of this gauge wheel support frame 10.
A gauge wheel 14 is pivotally supported via a bracket 13 and the like.

Reference numeral 15 denotes a plowing depth adjustment rod, which includes a screw shaft 17 rotatably supported at the rear end of the top mast 3 via a rotary piece 16, as shown in FIG. 2, and a screw tube screwed into the screw shaft 17. 18 and screw shaft 1
It is provided with a handle 19 etc. for rotating the screw 7, and a two-pronged connecting fitting 21 is fixed to the screw tube 18.

On the other hand, as shown in FIGS. 2 and 3, a mounting bracket 23 is provided on the horizontal member 22 of the gauge wheel support frame 10.
A bending link 25 and an operating link 26 are rotatably supported by a pivot pin 24 .

The bending link 25 is pivotably attached to the connecting fitting 21 by a pivot pin 27, and has a tapered surface 25a at the tip.
A wedge body 28 for unbendingly restraining the bending link 25 and the connecting fitting 21 is removably inserted between the tapered surface 25 a and the abutting surface 21 a of the connecting fitting 21 . There is.

The actuating link 26 has a U-shaped cross section sandwiching the bending link 25, and a wedge body 28 is rotatably supported on the actuating link 26 by a pivot pin 29. A hole 30 is formed through which the pin 27 is inserted.

The hole 30 is sized to allow relative rotation of the operating link 26 with respect to the bending link 25 so that the wedge body 28 can be inserted into and removed from the bending link 25 and the connecting fitting 21.

Reference numeral 31 denotes an operating lever for operating the operating link 26 in the direction of detachment of the wedge body 28, and is supported by a support shaft 32 on the mounting bracket 23 and resiliently supported on the horizontal member 22 by a spring 33.

A plate-shaped protrusion 34 is fixed to the support shaft 32, and a plate-shaped protrusion 34 is fixed to the operating link 26 side so that the protrusion 34 can come into contact with and engage with the operating link 26.
A contact plate 35 having multiple stages of retaining portions 35a is provided.

Next, the effect will be explained.

1 to 3 show a normal locked state, in which the operating link 26 is held so that the pivot pin 27 is engaged with the upper edge of the hole 30, as shown in FIG. 2, and the wedge body 28 is Since the connecting fitting 21 and the bending link 25 are fitted between the contact surface 21 a of the connecting fitting 21 and the tapered surface 25 a of the bending link 25 , the connecting fitting 21 and the bending link 25 cannot be bent. Normal tillage work can be performed by positioning the gauge wheel 14 at the plowing depth position, and at this time, even if an impact is applied to the gauge wheel 14 etc., the wedge body 2
8 is pivotally supported by the operating link 26 and is fitted and held between the connecting fitting 21 and the operating link 26, so that the wedge body 28 does not come off and become unlocked, allowing stable work.

When floating, the operating lever 31 is operated in the direction of arrow a to bring the protrusion 34 into contact with the contact plate 35 via the rotation shaft 32.

Then, the operating link 26 is pushed by the protrusion 34 and rotates in the direction of arrow b within the range of the hole 30, and the wedge body 28 pivotally supported by the operating link 26 is separated from between the connecting fitting 21 and the bending link 25. I'll go.

When the operating lever 31 is operated to a predetermined position, the abutment plate 35 comes into contact with the bending link 25, and after rotating the bending link 25 and the operating link 26 together in the direction indicated by the arrow b,
The protrusion 34 engages with the engagement portion 35a of the contact plate 35,
The bending link 25 and the operating link 26 are locked so that they cannot rotate in the opposite direction of the arrow.

Then, the entire rotary tiller was lowered and gauge wheel 1 was removed.
4 on the ridge, the pivot pin 27 will move as shown in Figure 4.
is above the line connecting the rotating piece 16 and the pivot pin 24, so the connecting fitting 21 and bending link 25 are bent upward at the pivot pin 2 position, and the gauge wheel support frame 10 is attached to the mounting shaft 11. The rotary tiller can be rotated upward and the rotary tiller can be lowered to the edge of the ridge.

When the gauge wheel 14 descends from the ridge into the field, the load pulls the connecting fittings 21 and bending links 25 in the straight direction, so each part automatically returns to its original position as shown in FIG. 2, and the gauge wheel support frame 10 will be locked again.

As described above, in the present invention, the wedge body pivotally supported by the operating link is interposed between the connecting metal fitting and the bending link, and both the connecting metal fitting and the bending link are restrained so that they cannot be bent. The wedge body does not come off easily and can be locked securely.

Furthermore, when floating, the wedge body is separated from between the connecting fitting and the bending link by rotating the operating link with the operating lever, making the operation very easy.

In addition, a retaining part is provided on the operating link, and a protrusion on the operating lever side is removably engaged with this retaining part, thereby holding the bending link in the bending position. There is no need to hold the operating lever in a rotationally operated state until the link is completely bent, and operability is improved in this respect as well.

Furthermore, since the structure is simple, the manufacturing cost is also low.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, in which Fig. 1 is an overall side view, Fig. 2 is an enlarged sectional view of main parts, and Fig. 3 is taken along A-A in Fig. 2.
The arrow view and FIG. 4 are operation explanatory diagrams. 10... Gauge wheel support frame, 14...
... Gauge wheel, 15 ... Plowing depth adjustment rod, 2
1... Connection fitting, 25... Bent link, 26... Operating link, 28... Wedge body, 31... Operation lever

Claims (1)

[Scope of utility model registration request] A gauge wheel support frame is pivoted to the rotary machine frame so as to be able to move up and down, and the gauge wheel support frame is vertically adjusted using a plowing depth adjustment rod provided on the rotary machine frame side. The link and the operating link are pivotably supported, the bending link and the connecting fitting of the plowing depth adjustment rod are pivotably connected, and the bending link and the connecting fitting are interposed so that they cannot be bent. A wedge body to be restrained is pivotally attached to an operating link, the operating link is rotatable relative to a refracting nonch such that the wedge body can be inserted into and removed from the wedge body, an operating lever is provided for operating the operating link in a direction in which the wedge body is removed, and the operating link is provided with: A floating device comprising a retaining portion with which a protrusion on an operating lever removably engages to hold the bending link in the bending position.