JPS6019524Y2 - 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, facilitate operation when floating, and ensure return of the operating lever.

In a rotary tilling device that is equipped with a gauge member, such as a gauge wheel, via a gauge support frame behind the rotary tiller, the gauge wheel becomes an obstacle and makes tilling at the edge of the ridge difficult. It is equipped with a so-called floating device that can be lifted to place the gauge wheel on the ridge, so that tillage can be started from a position where the rotary tiller is completely brought to the edge of the ridge.

However, conventional floating devices are mechanically very complex, and there are problems in that the lock may come 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 support frame is pivoted to the rotary machine frame so that it can move up and down, and the gauge 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 the wheel support frame, the bending link and a connecting fitting of the plowing depth adjustment rod are pivotally connected, and the bending link and the connecting fitting are interposed between the two. A wedge body that restrains the wedge body in an unbendable manner is pivotally attached to an operating link, the operating link is rotatable relative to the bending link so that the wedge body can be inserted into and removed from the wedge body, and an operating lever is provided to operate the operating link in a direction in which the wedge body is removed. The wedge is provided with a protrusion for pushing the operating lever back in the direction opposite to the wedge detachment direction when the wedge is bent.

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.
are support links, and these make up the rotary machine frame.

Reference numeral 5 denotes a claw shaft, which includes a large number of tilling claws 6, and these claw shafts 5 and tilling claws 6 constitute a rotary tiller.

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

Reference numeral 10 denotes a gauge support frame, which is pivotally supported on the support arm 2 via a mounting shaft 11 so as to be able to move up and down.A column 12 and a bracket 1 are provided on both sides of the rear end of the gauge support frame 10.
A gauge wheel 14 is pivotally supported via a third or 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 bundle 19 and the like 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, the gauge support frame 10
A bending link 25 and an operating link 26 are rotatably supported on a mounting bracket 23 provided on a horizontal member 22 by a pivot pin 24.

The bending link 25 is pivotably connected to the connecting fitting 21 by a pivot pin 27, and has a tapered surface 25a at the tip, and this tapered surface 25a and the contact surface 2 of the connecting fitting 21
A wedge body 28 for restraining the bending link 25 and the connecting fitting 21 so as not to bend is removably inserted between the bending link 25 and the connecting fitting 21.

The operating link 26 has a U-shaped cross section sandwiching the bending link 25, and a wedge body 28 is rotatably supported on the operating link 26 by a pivot pin 29. A hole 30 is formed through which 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, which is supported by a support shaft 32 on the mounting bracket 23, and is supported by a spring 33 on the contact surface 31a.
, 31b are supported by the horizontal member 22 in an unstable and switchable manner so as to be elastically supported.

Plate-shaped protrusions 34 and 35 are fixed to the support shaft 32, and on the operating link 26 side, there is a contact having a plurality of stages of retaining portions 36a so that the protrusions 34 can abut and engage with each other. A plate 36 is provided.

Further, the bending link 25 is integrally provided with a protrusion 37 so as to press the operating lever 31 in the return direction via the protrusion 35 when the bending link 25 is bent, that is, in the opposite direction to the detachment direction of the wedge body 28.

Next, the effect will be explained.

1 to 3 show a normal locking state, in which case a pivot pin 27 is attached to the upper edge of the hole 30 as shown in FIG.
Since the operating link 26 is held so as to engage with the wedge body 28 and the wedge body 28 is fitted between the contact surface 21a of the connecting fitting 21 and the tapered surface 25a of the bending link 25, the connecting fitting 2
1 and the bending link 25 are unbendable, so the gauge wheel 14 can be positioned at the tilling depth position set by the tilling depth adjusting rod 15 and normal tilling work can be performed. Even if a shock is applied, the wedge body 28
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 will not come off and be 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 36 via the support shaft 32.

Then, the operating link 26 is pushed by the protrusion 34 and rotates in the direction of the 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. Go.

When the operating lever 31 is operated to a predetermined position, the contact plate 36 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,
As shown in FIG. 4, the protrusion 34 engages with the engaging portion 36a of the contact plate 36, and locks the bending link 25 and the operating link 26 so that they cannot rotate in the opposite arrow direction.

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

On the other hand, place the gauge wheel 14 on the ridge and connect the connecting fitting 21.
When the bending link 26 bends, the operating lever 31 comes into a state in which the contact surface 31b is in contact with the horizontal member 22 by the spring 33, as shown in FIG.

When the bending link 25 rotates in the direction of arrow b due to the bending action with the connecting fitting 21, the protrusion 37
Since the waist operating lever 31 is pushed back against the spring 33, when the operating lever 31 passes the dead point, the contact surface 31a is in contact with the horizontal member 22 as shown by the imaginary line in FIG. to return to.

The quick return of the operating lever 31 is determined by the size of the interval between the protrusion 37 and the protrusion 35. Therefore, if the interval is set to match the low ridge, the timing will always be constant regardless of the height of the ridge. It is possible to return it with certainty.

When the gauge wheel 14 descends from the ridge into the field, the load pulls the connecting fitting 21 and bending link 25 in the straight direction, so each part automatically returns as shown in FIG. 2, and the gauge support frame 10 lock it again.

In the above embodiment, the protrusion 37 is integrally provided on the bending link 25, but as shown in FIGS. 6 and 7, the protrusion 37 is formed on a sheath body 38 having a U-shaped cross section, and The body 38 is removably fitted into the bending link 25, and the pivot pin 2 is inserted into the pin hole 39.
4 can be inserted and fixed, and in this way, various sheath bodies 38 with different shapes of protrusions 37 can be used.
It is also possible to prepare and use them depending on the conditions.

Note that the fitting portion of the sheath body 38 of the bending link 25 is made smaller in size by the thickness thereof.

Further, a contact plate 39 is attached to the protrusion 37 side.

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.

In addition, when floating, if the operating link is rotated using the operating lever, the wedge will separate from between the connecting fitting and the bending link, making the operation very easy and structurally simple. The manufacturing cost is also low.

In addition, when the bending link is bent, the operating lever is pushed back with its protrusion, so it can be returned reliably.
Moreover, the restoration can always be carried out at a constant rate regardless of the height of the ridge.

[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 the main part, and Fig. 3 is taken along A-A in Fig. 2.
The arrow view, FIGS. 4 and 5 are explanatory views of the operation, FIG. 6 is an enlarged sectional view showing another embodiment, and FIG. 7 is a perspective view of the sheath body. 10... Gauge support frame, 14... Gauge wheel, 15... Plowing depth adjustment rod, 21...
... Connecting fitting, 25 ... Refraction link, 26.
...Operating link, 28...Cuneiform body, 31.
......operation lever, 34, 35...protrusion,
37...Tsuko.

Claims (1)

[Scope of utility model registration request] A gauge support frame is pivotally supported on the rotary machine frame so as to be able to move up and down, and this gauge support frame is adjusted up and down with a plowing depth adjustment rod provided on the rotary machine frame side. A wedge body that rotatably supports the link, pivotally connects the bending link and the connecting fitting of the plowing depth adjustment rod, and interposes between the bending link and the connecting fitting to restrain both of them in an unbendable manner. is pivotally connected to the operating link, the operating link is rotatable relative to the bending link so that the wedge body can be inserted into and removed from the wedge body, and an operating lever is provided to operate the operating link in the direction of detaching the wedge body, and the operating link is provided with an operating lever on the bending link when the wedge body is bent. A floating device characterized in that a protrusion is provided for pushing back the wedge in a direction opposite to the wedge detachment direction.