JPS5925130Y2 - floating device - Google Patents

Description

[Detailed description of the invention] The present invention relates to a floating device for a rotary tiller, which ensures secure locking, facilitates operation when floating, especially when an impact is applied, and prevents the floating operating lever from returning. The aim is to ensure that.

In a rotary tilling device equipped with a wheel-type or sled-type gauge body behind the rotary tiller via a gauge support frame, the gauge body protrudes significantly rearward and becomes an obstacle, making it difficult to till the edge of the furrow. becomes.

Therefore, a so-called floating device that lifts the gauge support frame enough to place the gauge body on the ridge is installed, so that tilling 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 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 inventors of the present invention have proposed a floating device that solves these conventional problems.

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 constitute 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 vertically movably connected to the support arm 2, which is a rotary machine frame, via a mounting shaft 11, and protrudes more rearward than the tilling section. There are struts 12 and brackets 13.
In the figure, a wheel-shaped gauge body 14 is provided through the gauge body 14 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. 1, 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, the gauge support frame 10
A bending link 25 and an operating link 26 are rotatably supported by a pivot pin 24 on a mounting bracket 23 provided on a horizontal member 22 halfway in the longitudinal direction of the frame.

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 pivotally supported at 23 to the mounting bracket 1 by a support shaft 32.

33 is a spring, which is hung between the pin 31 a of the operating lever 31 and the pin 23 a of the mounting bracket 23;
Unstable switching occurs around the support shaft 32 of the operating lever 31.

A plate-shaped engagement body 34 is fixed to the support shaft 32 and has a protrusion 35 on its boss portion, while the holder 34 is provided on the operating link 26 side so that it can abut and engage. , a contact plate 36 having a plurality of stages of engaging portions 36a is provided.

A cam body 37 is formed with a protruding curved surface at the tail end of the bending link 25, and this cam body 37 pushes out the protrusion 35 when floating.

Additionally, reference numeral 38 denotes a diagonal abutment provided at the end of the operating lever 31, which abuts against the horizontal member 22 to restrict the upper limit movement of the lever 31.

Next, the action 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 body 14 at the plowing depth position.At this time, even if an impact is applied to the gauge body 14, etc., the wedge body 28 is pivotally supported by the operating link 26 and remains connected. Since the wedge body 28 is fitted and held between the metal fitting 21 and the operating link 26, the wedge body 28 will not come off and be unlocked, allowing stable work.

In particular, in this case, the operating lever 31 is eccentric to the lower limit with respect to its support shaft 32 and the spring 33 is suspended as shown in FIG. It is.

When floating, move the operating lever 31 to a in Figure 2.
The engaging body 34 is brought into contact with the contact plate 36 via the support shaft 32 by operating in the direction of the arrow.

The operation of this operating lever 31 is forcibly applied when the spring 33 is eccentrically hung from the upper limit relative to the support shaft 32, and the operating link 26 is pushed by the engaging body 34 and the hole is opened. 30 in the direction of arrow b in FIG.
1 and the bending link 25.

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,
The engaging body 34 engages with the engaging portion 36a of the contact plate 36,
The bending link 25 and the operating link 26 are locked so that they cannot rotate in the opposite direction of the arrow.

The operating limit of the operating lever 31 is regulated by the hit 38.

If the entire rotary tiller is lowered and the gauge body 14 is placed on the ridge, the pivot pin 27 will be located above the line connecting the rotation piece 16 and the pivot pin 24, as shown in FIG. At the pivot point 2 position, the connecting fitting 21 and the bending link 25 are bent upward, 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. can.

Then, when the gauge body 14 descends from the ridge into the field and raises the rotary tiller a little, the connecting fitting 21 and bending link 25 are pulled in the linear direction by the load, so each part automatically moves as shown in FIG. It returns as shown and locks the gauge support frame 10 again.

In summary, 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 easily come off due to a simple impact and can be locked securely.

Further, 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, so the operation is very easy.

Furthermore, 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 bent position. There is no need to hold the operating lever in a rotationally operated state until it is completely bent, and operability is improved in this respect as well.

In addition, the operating lever, which is pivotally supported on the gauge support frame, is provided with an unstable switching spring whose protrusion urges the engaging portion in each of the engagement and disengagement directions, so that it can be switched between the locked state and the floating state. Switching becomes easier, the bent position in which the protrusion on the operating lever side is engaged with the retaining part of the operating link can be reliably maintained, and the structure is simple. The manufacturing cost is also low.

[Brief explanation of the drawing]

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 and FIG. 4 are operation explanatory diagrams. 10... Gauge support frame, 14... Gauge body, 15... Cultivation depth adjustment rod, 21...
Connecting fittings, 25... Refraction link, 26...
...Operating link, 28...Cuneiform, 31...
...Operation lever, 38... Spring, 34...
...Engaging body, 35...Protrusion, 37...
Cam body.

Claims (1)

[Scope of utility model registration request] The front part of a gauge support frame 10 equipped with a gauge body 14 at the rear is connected 11 to the rotary machine frame so as to be able to rise and fall freely, and this gauge support frame 10 and the rotary machine frame are connected by a plowing depth adjustment rod 15. In the gauge support frame 10, a bending link 25 and an operating link 26 are rotatably supported via a pin 24, and a bending link 25 and a connecting fitting 21 of the plowing depth adjustment rod 15 are bent via a pin 27. They are freely pivotally connected and interposed between the bending link 25 and the connecting fitting 21 so that both 2
The wedge body 28 that unbendably restrains 5.21 is the operating link 2.
6, and the operating link 26 and the bending link 25 are rotatable so that the wedge body 28 can be inserted into and removed from the operating link 26.
The gauge support frame 10 is attached to the gauge support frame 10 via an operating lever 31 that operates the lever 6 in the wedge detachment direction or a pin 32 that is different from the pin 24 that rotatably supports the bending link 25 and the operating link 26. The operating link 26 further includes a retaining portion 36 in which a protrusion 34 on the operating lever 31 side is removably engaged to hold the bending link 25 in the bending position.
An unstable switching spring 3 is provided, which biases the protrusion 34 on the operating lever 31 side between the operating lever 31 and the gauge support frame 10 in each of the engagement and disengagement directions with respect to the engaging portion 36.
A floating device comprising: 3.