JPS6312642Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a cover device for a forward-reversing rotary tiller that can be used for down-cut tilling and up-cut tilling by reversing the claw shaft.

This type of cover device is provided with a front cover in addition to a rear cover, and while both front and rear covers are required for up-cut tilling in which the claw axis is reversed, they are not required for down-cut tilling. be. For this reason, in the past, the front cover was removed when downcutting tillage, but it was very troublesome to attach and detach, and the attachment member was often lost when removed.

In view of these problems with conventional devices, the present invention has been developed to provide a fixing bracket that allows the front cover to be bent into a retracted position when not in use without having to be removed, and to maintain the front cover in a working position. It is an object of the present invention to provide a cover device for a forward/reverse rotary tiller configured to be able to be held in a retracted position.

The features of the present invention to achieve this objective include a main cover fixed to the machine frame, a front cover that is bendably connected to the front and rear of the main cover, and a front cover that can be bent forward and backward. In the cover device for a forward/reverse rotary tiller covered with a rear cover, the front cover is formed of an elastic plate that can be bent and its lower part lifted above the main cover, and the lower part is connected to the machine frame. A fixing bracket is removably installed on the machine frame, and this fixing bracket is attached to the machine frame in a position that allows the front cover to be bent and held in such a way as to keep its lower part above the main cover. The point is that a mounting part is formed for the purpose.

Embodiments of the present invention will be described below with reference to the drawings.

In FIGS. 1 to 3, 1 is a tractor body, 2 is a hydraulic system for raising and lowering the working machine, and has a lift arm 3, 4 is a rear wheel, and 5 is a three-point link mechanism.
It consists of a top link 6 and a lower link 7, and the lower link 7 is connected to a lift arm 3 via a lift rod 8, and a rotary tiller 9 is attached to the rotary tiller 9 for traction.

The rotary tiller 9 is of a side drive type and can be rotated in forward and reverse directions, and includes a machine frame 10 and a forward and reverse tiller section 11.
and a cover device 12 that covers the tilling section 11.

The machine frame 10 is formed into a gate shape with support arms 13b integrally projecting from a gear case 13a on the left and right sides, and a side frame 13c and a transmission case 13d provided at the outer ends of the left and right support arms 13b. A rearwardly protruding support frame 14 is supported on the machine frame 10 so as to be rotatable about a horizontal axis, and a pair of gauge wheels 15 are provided at both rear ends of the support frame 14.

The tilling section 11 consists of a pawl shaft 16 supported between the lower ends of the machine frame 10 so as to be rotatable around a horizontal axis, and a tilling pawl 17 implanted in the pawl shaft 16, which can be rotated in either forward or reverse direction. The pawl can be tilled even when the pawl shaft 16 is turned in the forward or reverse direction by a forward/reverse mechanism (not shown) in the gear case 13a.

The cover device 12 includes a main cover 18 fixed to the machine frame 10, and a rear cover 19 that is pivotally attached to the rear end of the main cover 18 and can be bent vertically.
, a front cover 26 provided at the front end of the main cover 18 in a downwardly downward manner and bendable; and a pair of front and rear side covers 20 and 41 fixed to the main cover 18 , respectively. ing.

The rear cover 19 is urged downward by a bullet lowering mechanism 21 and can adjust the equalizing pressure.
Between this rear cover 19 and the tilling section 11, a Reiki rod 49 is arranged substantially along the outer periphery of the tilling section 11.

The Reiki rod 49 has many circular arc rods 4 on the band plate 49a.
9b are welded in parallel, and is fixed to the lower surface of the main cover 18 via bolts 50, and crushes and separates the tilled soil into layers to form a field with finely ground soil in the surface layer and large soil lumps in the lower layer.

Reference numeral 22 denotes a rear auxiliary cover, which is pivotally supported on the rear cover 20 by a pivot 23, and has an arc hole 24 and a bolt 2.
5, it is attached to the rear side cover 20 so that its vertical position can be adjusted.

The front cover 26 is made of a bendable elastic plate such as a rubber plate, and its rear end (upper part) is connected to the front end of the main cover 18 via a backing plate 27 and bolts 28, and has an elastic plate. Since it is a plate, it can be bent at its joints.

Bolts 3 are attached to the front end (lower part) of the front cover 26 so that the front cover 26 is held between a holding member 29 having a triangular cross section and a backing plate 30 over the entire length in the width direction.
1, and a plurality of (two in this embodiment) brackets 32 are provided in the middle of the holding member 29 in the longitudinal direction.

Reference numeral 35 designates a fixing metal fitting that connects the machine frame 10 and the front part of the front cover 26, and is formed of a plate material in the shape of a letter when viewed from the side.
The other end 35b is fixed to the lower link connecting bracket 36 fixed to the lower link connecting bracket 36 via a bolt 37, and the other end 35b is fixed to the bracket 32 of the holding member 29 via a bolt 38, and these fixings are removable. A mounting portion 39 having a hole into which a bolt 37 can be inserted is formed in the middle.

One end 35a of the fixing metal fitting 35 is attached to the bracket 3.
6, the other end 35b is fixed to the bracket 32.
In the state shown in the figures to FIG. 3, the front cover 26 is in a working position with its front end at the lowest position and covers the front of the tilling section 11, and when the tilling section 11 is reversed to till the soil. This prevents the soil from scattering forward and crushes the soil.

Since the front cover 26 is an elastic plate, it can be bent not only at the connecting part with the main cover 18 but also in the middle thereof.By removing the fixing fittings 35, the front end (lower part) of the front cover 26 can be bent. As shown in FIG. 4, it is possible to lift the main cover 18 above, and by lifting it, it becomes a retracted position in which it does not act as a cover. When the attachment part 39 is attached to the bracket 36 so that the other end 35b is on the rear side, the one end 35a can press the front end of the front cover 26 against the main cover 18, so that the front cover 26 can be evacuated. Can maintain posture. Furthermore, there is no need to specially store the front cover mounting members such as the fixing fittings 35 and bolts 37, and there is no fear that they will be lost.

In the fixing fitting 35 of the above embodiment, the front cover 2
When changing the posture of 6, flip it back and forth and place it on bracket 3.
However, by forming a bent portion of the fixing fitting 35 in the vicinity of the other end 35b, it is possible to configure the fixing fitting 35 so that it can be attached without being reversed from front to back.

Further, in the embodiment, female screw members 40 are welded to both ends of the presser member 29, while the main cover 18
A bracket 43 with a hole 42 is provided at the front end position of the side edge.
The female screw member 40 and the hole 42 face each other, and a bolt 44 inserted through the hole 42 can be screwed into the female screw member 40. By screwing together the bolts 44, the front cover 26 can be held in the retracted position at four locations in total, including both ends in the width direction and two locations in the middle, and can be held reliably. However, the front cover 2
6 may be held in the retracted position only at either end or midway.

Reference numeral 45 denotes a front auxiliary cover, which is supported by the front cover 41 via a pivot 46, and is attached to the front cover 41 using arcuate holes 47 and bolts 44 so that its vertical position can be adjusted. The bolts 44 are for maintaining the retracted position of the front cover 26, and pass through the front side cover 41 and are screwed into the female screw members 40 of the front cover 26 in the working position. 26 and the front auxiliary cover 45.

In addition, as a modification of the present invention, the fixing fitting 35
The other end 35b is connected to the bracket 32 with a pin so that it can rotate freely, and the other end 35b is connected to the bracket 32.
It is also possible to attach the attachment part 39 to the bracket 36 by detaching the one end 35a from the bracket 36 and bending the front cover 26 while lifting the front end of the cover 26 without detaching it from the bracket 36.

According to the present invention detailed above, the front cover 26
can change its position between a working position that covers the front of the tilling section 11 and a retracted position where its lower part is bent above the main cover 18, so there is no need to remove it when cultivating downcuts, and it can be attached and removed. No additional work is required, and the fixing bracket 35 for holding the work position can be used to hold the front cover 26 in the retracted position by simply changing the mounting position with respect to the machine frame 10. There is no need to lose any parts or provide storage space, and the efficiency of forward and reverse rotation work of the rotary tiller can be improved.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which Fig. 1 is an overall side view, Fig. 2 is a perspective view, Fig. 3 is a cross-sectional side view showing the front cover in the working position, and Fig. 4 is a side view of the present invention.
The figure is a cross-sectional side view showing the front cover in a retracted position. 9...Rotary tiller, 10...Machine frame, 11...
... Cultivation section, 12 ... Cover device, 18 ... Main cover, 19 ... Rear cover, 26 ... Front cover,
29... Pressing member, 35... Fixing metal fittings, 35a...
...One end, 35b...Other end, 39...Mounting part.

Claims (1)

[Scope of utility model registration request] A forward and reverse rotary tiller in which a forward and reverse capable tilling section 11 is covered with a main cover 18 fixed to a machine frame 10, and a front cover 26 and a rear cover 19 which are bendably connected to the front and rear of the main cover 18, respectively. In the machine cover device, the front cover 26 is formed of an elastic plate that can be bent and its lower part lifted above the main cover 18, and a fixing fitting 35 connecting the lower part and the machine frame 10 is attached to the machine frame. 10 is removably provided,
The fixing fitting 35 is formed with a mounting portion 39 for attaching the front cover 26 to the machine frame 10 in a position that can be bent and held down to maintain the state in which the lower part is placed above the main cover 18. A cover device for a forward/reverse rotary tiller, which is characterized by: