JPS648961B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (A) Field of Industrial Application The present invention is configured such that the tiller claw attachment shaft of a rotary tiller can be easily attached and detached by a single operator.

(b) Prior art Conventionally, in rotary tillage devices, the tiller claw attachment shaft has been supported on one side by a drive chain case, and on the other side by fixed bearings on a side plate attached to a side cover. It was.

However, it was troublesome to attach and detach the solid bearing on the side plate and the tiller claw attachment shaft.

That is, as shown in the conventional drawings of FIGS. 5 and 6, since the strength supporting member of the right side support portion of the tilling claw attachment shaft 6 is the bearing case 15 itself, when the bearing case is exposed to the outside of the side plate 11, the tilling is stopped. Since the case will be damaged if it comes into large contact with uncultivated land, in order to support it inside the side plate 11, the extended part of the bearing case 15 is applied to the side plate from the inside and fixed with three bolts 12, 12, 12. That's what I was doing.

In addition, since the shim 24 to compensate for the inclination of the side plate 11 and the error in the tiller claw mounting axis was supported by being inserted inside the side plate 11, it was difficult to insert the shim 24, and the bolt 12 He was unable to insert the tube by himself and needed another assistant.

(C) Problems to be Solved by the Invention The present invention provides that, depending on the type of work, the tilling claw attachment shaft of a rotary tillage device may be attached to a tilling claw attachment shaft when a ridge-building device, a mulching device, etc. is installed. It is necessary to replace it with a spiral claw mounting shaft, etc.

Furthermore, if straw or weeds become wrapped around the tilling claw attachment shaft, the tilling claw shaft is often removed for cleaning or repair.

When reassembling after completing these tasks, it is a tedious task for one person to support the long tiller claw mounting shaft, insert and secure the bolts, and in the past, it was difficult to do without two people. I couldn't help it.

The present invention is a side plate side bearing support device for a tilling claw mounting shaft, in which a lid of a bearing case is provided to protrude upward, and is configured to be applied from the outside of the side plate, and a shim is inserted between the lid and the side plate. It is configured to be tightened and fixed.

With this configuration, the side plate 11 side of the tilling claw attachment shaft can be approached from the outside of the side plate 11 and assembled.

That is, with the tilling claw mounting shaft 6, bearing case 15, and lid body 8 integrated, the chain case 4 side of the tilling claw mounting shaft 6 is inserted into the protrusion of the tilling claw drive shaft on the chain case side, or It is possible to temporarily fix the flange part, place the lid of the bearing case on the side plate side to the outside of the side plate, insert a shim into that part, and then bolt the lid 8 to the side plate 11. This allows the operator to perform attachment/detachment work by himself/herself.

Furthermore, since the lid of the bearing case can be tightened by applying it to the side plate from the outside, a dowel pin is provided protruding from the lid and is temporarily supported by the dowel pin. You can also temporarily support it on both sides with the side dowel pins and then gradually tighten it.

(d) Means for Solving the Problems The objects of the present invention are as described above, and the configuration for achieving the objects will now be explained.

In the bearing support device for the tilling claw mounting shaft 6 of a side drive type rotary tiller, the chain case 4 side is provided with a flange 5a of the tilling claw drive shaft 5 on the tilling claw drive shaft 5 supported by the chain case 4 by bearing.
and is coupled and supported by the flange 6a of the tilling claw attachment shaft 6, and the bearing support portion on the side plate 11 side at the other end is
Bearing case 15 that supports the other end of the tilling claw mounting shaft 6
A lid 8 protruding upward is fixedly provided on the outer end surface of the side plate 11, and a shim 14 is interposed between the lid 8 and the outer surface of the side plate 11 to abut the lid 8 from the outside. are tightened and supported by bolts 12.

(E) Embodiment The object and structure of the present invention are as described above. Next, the structure of the embodiment shown in the attached drawings will be explained.

Figure 1 is a rear sectional view showing the drive unit of the rotary tiller, Figure 2 is a side view of the tilling claw attachment shaft on the side plate, Figure 3 is a drawing of the shim 14, and Figure 4 is a diagram of the tilling claw attachment shaft. Drawings showing the assembled state, FIG. 5 is a side view of the conventional side case side bearing support device,
FIG. 6 is a rear sectional view as well.

In Fig. 1, power is transmitted from the PTO shaft of the tractor to the input shaft 1 of the tillage gearbox 2 through a universal joint.

Left and right beams 2 to both sides of tillage gearbox 2
8 and 13 are provided in a protruding manner, the power transmission shaft 3 passes through the beam 28 on the left side, and the chain case 4 is fixedly installed at the left end. A side frame 11 is fixed to the right end of the right beam 13.

A tilling pawl drive shaft 5 is fitted into a sprocket 29 on the lower side of the chain case 4. The tilling claw drive shaft 5 is combined with the tilling claw mounting shaft 6 through flanges 5a and 6a to form a single shaft, and this unified shaft is supported by a bearing 30 on the left side and a bearing 31 on the right side. It will be done.

Further, a protrusion 5b that fits into the tilling claw mounting shaft 6 from the tilling claw drive shaft 5 and can be temporarily engaged with the tilling claw mounting shaft 6.
It constitutes.

The tilling claw attachment shaft 6 has mounting seats for the tilling claws 20 fixedly arranged in a fixed arrangement.

The tilling claw mounting shaft 6 has flanges 5a, 6a on the left side.
The bearing case 15 on the right side is supported by a bearing by connecting it to the side plate 11.

As shown in FIG. 4, first, the left end of the tilling claw mounting shaft 6 is hooked to the protrusion 5a of the tilling claw drive shaft 5 to temporarily support it, and then the right end is lifted and the lid 8 of the right bearing case 15 is lifted. is fixed to the side plate 11 by bringing the upwardly protruding and extended portion into contact with the side plate 11 from the outside.

In this configuration, the conventional bolt wear prevention cover 21 is replaced with a pressed plate, and the cover body 8 of this bearing case 15 is used.Although the pressed plate is used, the protection part of the bolt 18 is protruded in a cylindrical shape and is made into a cylindrical shape 8b, and the outer periphery is on the outside. There is a protruding portion 8a extending around the entire circumference of the bolt 10 which also serves as a protection plate for the bolt 10, and these raised edges make the lid 8 strong and serve as a strength supporting member.

The lid body 8 is used as a strength support member, and the side frame 1
1 is configured so that the lid 8 is applied to the side plate 11 from the outside and fastened with three bolts 12, 12, 12, so the shim 14 can be easily inserted from the outer peripheral edge of the lid. be.

Further, as shown in FIG. 3, the shim 14 has a bolt part and a pin part as notches, so that the shim 14 can be inserted from above without removing the bolt.

In addition, since the lid 8 can be attached as a strength support member by abutting it from the outside of the side frame 11, the knock pin 9 is provided to protrude inward from the lid 8, and a hole for fitting the knock pin 9 is also provided on the side frame 11 side. Open it and insert the chain case 4 side into the protrusion 5 as shown in Figure 4.
After temporarily supporting the tiller claw mounting shaft 6 on the side frame 11 side, insert the dowel pin 9 to temporarily support it, then prepare the bolts 12 and gradually tighten the lid body 8 to the side frame 11. It is possible.

Further, as mentioned above, since the outer periphery of the lid body is edged by deep drawing in a press, there is no need to attach a protective plate for the bolt 10 as in the conventional case.

(F) Effects of the Invention Since the present invention is configured as described above, it has the following effects.

First, in the side plate side bearing support device of the tilling claw attachment shaft of a rotary tiller, the lid of the bearing case is extended upwardly and is configured to be applied from the outside of the side plate, so that the lid and the side plate are Since the structure was configured to tighten and fix by inserting a shim between them, the tilling claw mounting shaft was temporarily fixed to the tilling claw drive shaft on the chain case side, and then on the side plate side, the upper extension part of the lid body 8 was attached to the side plate. Since the bolts can be tightened by applying the bolts to the outside of the shaft, and the shims are inserted into the outside portion, the tiller claw attachment shaft 6 can be attached and detached by a single operator.

Second, when fitting the bearing case inside the side plate as in the past, unless the flanges 5a and 6a are completely aligned, the bearing case side cannot be inserted inside the side frame, and this operation is difficult. This would have required physical strength, but in the present invention, it is applied from the outside, so even if there is a slight deviation, the flanges 5a and 6a can be brought into alignment by tightening the bolts.

Thirdly, by making contact with the side plate from the outside, a knock pin or the like is provided protruding from the side of the lid 8, and the knock pin provides temporary support to the side frame. At the same time, both can be temporarily supported, and after completing this operation by one person, the bolts can be gradually inserted and tightened.

[Brief explanation of drawings]

Figure 1 is a rear sectional view showing the drive unit of the rotary tiller, Figure 2 is a side view of the tilling claw attachment shaft on the side plate, Figure 3 is a drawing of the shim 14, and Figure 4 is a diagram of the tilling claw attachment shaft. Drawings showing the assembled state, FIG. 5 is a side view of the conventional side case side bearing support device,
FIG. 6 is a rear sectional view as well. 5... Tilling claw drive shaft, 6... Tilling claw mounting shaft, 8
... Lid body, 11 ... Side plate, 14 ... Shim, 15 ... Bearing case.

Claims (1)

[Claims] 1. In a bearing support device for a tilling claw mounting shaft 6 of a side drive type rotary tiller, on the chain case 4 side, the flange 5 of the tilling claw drive shaft 5 is attached to the tilling claw drive shaft 5 which is bearing supported on the chain case 4.
a and the flange 6a of the tilling claw mounting shaft 6, and the bearing support portion on the side plate 11 side at the other end is a lid projecting upward on the outer end surface of the bearing case 15 that supports the other end of the tilling claw mounting shaft 6. Fix the body 8,
A tilling claw attachment characterized in that a shim 14 is interposed between the outer surface of the side plate 11 and the lid body 8 is brought into contact with the lid body 8 from the outside, and the side plate 11 and the lid body 8 are tightened and supported by bolts 12. Shaft bearing support device.