JP2001245501A - Mechanism for supporting rotary in rotary work machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mechanism for supporting a rotary in rotary work machine, capable of preventing straws, weeds or the like from twining around the end of a claw shaft. SOLUTION: In this mechanism for supporting a rotary in rotary work machine having the claw shaft 14 of which the curved surface is protjectingly equipped with a rotary claws 15 for carrying out cultivation work of farm fields, and further having a holder 24 which contains a bearing 23 in a bearing box 17 for supporting both the ends of the claw shaft 14 to freely rotate the shaft and is attached to the side of a machine frame 5, a rib-shaped scraper 28 for scraping down the straws, the weeds or the like from the end of the claw shaft 14 is attached to the holder 24 so that the scraper 28 is upward protruded from the outer surface of the holder 24, the bearing box 17 is located in such a position that the bottom of the bearing box 17 is not projected in a direction of the farm field from the bottom of a flange located at a position in the claw shaft 14 near to the holder 24, and further, an edge of the scraper 28 facing to the flange is positioned near the flange.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary support structure for a tilling rotary working machine connected to a tractor or the like.

[0002]

2. Description of the Related Art Conventionally, a rotary working machine for tilling mounted on a tractor or the like has a claw shaft provided with a rotating claw for projecting a field by rotation. In general, a structure is rotatably supported on a frame of a working machine (working machine frame) via support shafts fixed to both ends. During operation of the work machine, grass or the like may be wrapped around the bearing portion of the work machine frame supporting the support shaft. For this reason, a winding prevention mechanism for preventing the grass or the like from wrapping around the bearing portion may be provided. The one provided on the claw shaft side is known. However, the above-described winding prevention mechanism makes it difficult to attach and detach the claw shaft, and when the cultivation depth is increased, the winding prevention mechanism is inserted into the field and may adversely affect the tilling.

[0003]

In order to solve the above-mentioned problems, a rotary support structure of a rotary working machine according to the present invention comprises a claw shaft 14 having a rotary claw 15 for tilling a field projected on a peripheral surface thereof. A bearing portion 17 for rotatably supporting both end portions of the claw shaft 14 is provided on the work machine frame 5 side, and the bearing portion 17 includes a claw shaft bearing 23 and the bearing 23 inside. And a holder 24 fixed to the work machine frame 5 side and provided with a flange near the holder 24 of the claw shaft 14, a rib for scraping off straw and weeds on the end side of the claw shaft 14. The scraper 28 is provided so as to protrude upward from the outer peripheral surface of the holder 24 so as to be located between the holder 24 and the flange, and the flange-side end surface of the scraper 28 is brought close to the flange. Because, the lower end portion of the bearing portion 17 is the first, characterized in that arranged at a position not projecting in the field side of the lower end portion of the flange.

Further, flanges 14a are provided at both ends of the claw shaft 14, and at least one end of the claw shaft 14 has
A shaft 19 fixed via the flanges 14a, 19a of each other and rotatably supported by the bearing 17;
Connect the end face of the scraper 28 to the flange 19a of the shaft 19.
Is a second feature of the invention.

Further, the scraper 28 is formed in a mountain shape in a side view, and the structure is such that straw and weeds on the end side of the claw shaft 14 are guided outward in both forward and reverse rotation directions of the claw shaft 14. The feature is.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, a rotary working machine 1 according to the present embodiment is provided behind a traveling body 2 such as a tractor.
It is connected up and down via a point link hitch 3 so as to be able to move up and down, and has a structure similar to the conventional one for tilling work in a field. As shown in FIGS. 1 and 2, PTO power is input from the traveling body 2 side. A pipe frame 6 is provided so as to protrude left and right from the gear case 4, and a chain case 7 is provided at one (left) outer end of the pipe frame 6, and a pipe case 6 is provided at the other (right) outer end thereof in plan view. The side frames 8 each having a U-shaped cross section are integrally provided.

That is, the gear case 4, the pipe frame 6,
A chain (working machine frame) 5 of the rotary working machine is constituted by the chain case 7, the side frame 8, and the like. On the other hand, a bearing (not shown) on the chain case 7 side is provided below the chain case 7 and the side frame 8.
And bearings 16 and 17 for holding the bearings 13 on the side frame 8 side, respectively, and a support shaft (not shown) on the chain case side is mounted on the bearing on the chain case 7 side and the bearing 13 on the side frame 8 side. A support shaft 19 on the side frame 8 side is rotatably supported on each side.

The two support shafts 1 are provided at both ends of the claw shaft 14.
9 are attached to each other, so that the pawl shaft 14 is rotatably supported between the side frame 8 and the chain case 7 via a support shaft as in the related art, and the driving force input to the gear case 4 is reduced. The input is input to the pawl shaft 14 via the chain case 7, and the pawl shaft 14 is driven to rotate.

At this time, flanges are provided at both ends of the both support shafts on the side of the claw shaft 14 and both ends of the claw shaft 14, and the fixing between the claw shaft 14 and the support shaft is as shown in FIG. The flange on the side of the claw shaft 14 and the flange on the side of the support shaft are fixed with bolts or the like so that they can be detached and attached. FIG. 3 shows a fixed state of the support shaft 19 on the side frame 8 side and the claw shaft 14.
Side flange 14a and support shaft 19 side flange 1
9 a is fixed by bolts 21.

A plurality of rotating claws 15 for tilling the field by rotation are attached to the claw shaft 14 via a claw holder 10 provided on the outer periphery of the claw shaft 14 as in the conventional case. A rotary 20 is configured so that the rotating claw 15 performs the tilling work on the field by the rotation of the shaft 14.

On the other hand, as shown in FIGS. 3 to 5, a bearing portion 17 for rotatably supporting the support shaft 19 includes an oil seal 25 located on the support shaft 19 side and a cap 22 located on the outer end surface side. , A bearing (bearing) 23 disposed between the oil seal 25 and the cap 22
And a holder 24 having a substantially cylindrical shape.
And a fixing portion 26 that protrudes upward from the outer peripheral surface of the side frame 8 and is fixed to the side frame 8 side. The fixing portion 26 is fixed to the side frame 9 via a bolt 27 between the holder 24 and the fixing portion 26. A rib-shaped scraper 28 is provided so as to protrude upward so as to be located between the fixed portion 26 and the flange 19a of the support shaft 19 in the state in which it is in the state.

At this time, the outer diameter of the holder 24 is smaller than the diameter of the flange 19a of the support shaft 19, and
From the center of the shaft (the center of the support shaft 19)
Distance to the tip of the support shaft 19
It is set to be substantially the same as or slightly larger than the maximum radius of a. The inner end surface of the scraper 28 (the surface facing the flange 19a) is connected to the side frame 9 of the holder 24.
In the state of attachment to the flange 19a, it is close to the flange 19a. Further, the scraper 28 has a gentle mountain shape so as to sequentially project outward in both forward and reverse directions of rotation of the claw shaft 14 (support shaft 19) in a front view.

Accordingly, even when straw, weeds, or the like are wound near the bearing portion 17 of the claw shaft 14 that rotates integrally with the support shaft 19 during tilling work or the like, the wrapped straw or weeds are caught by the claw shaft. Straw, weeds, and the like come into contact with the scraper 28 at the back side position of the side frame 8 when being taken along with the 14 side, and are detached from the claw shaft 14 side. Is prevented.

At this time, since the scraper 28 has a mountain shape as described above, the rotation of the claw shaft 14 guides the straw, weeds, and the like in a direction in which the straw, weeds, and the like are removed from the claw shaft 14 side. In addition to being able to be easily detached from the side of the claw 14, the straw or weeds are removed from the side of the claw shaft 14 with the rotation of the claw shaft 14 regardless of whether the rotation direction of the claw shaft 14 is the forward direction or the reverse direction. The above effect can be obtained by guiding in the direction.

In other words, the scraper 28 constitutes an anti-winding mechanism for preventing winding of straw, weeds and the like around the bearing portion. This anti-winding mechanism is not provided on the claw shaft 14 side. Since the holder 24 is set to have a smaller diameter than the flange 19a, and the lower end of the bearing portion 17 does not protrude downward (field side) from the lower end of the flange and is relatively small, the tillage depth is relatively large. Even if the wrapping prevention mechanism is arranged on the claw shaft side, the scraper 28 side (holder 24) does not come into contact with or is inserted into the field, and a deeper tillage depth can be set. It becomes possible.

The scraper 24 also reinforces the bearing 17 (functions as a rib). That is, since the reinforcing rib and the winding prevention mechanism (scraper 28) are integrally formed, the bearing 17 is compact, In addition, a simple structure is possible. Further, the attachment / detachment of the claw shaft 14 can be easily performed without adversely affecting the attachment / detachment of the claw shaft 14. Although the scraper 28 in the above embodiment has a mountain shape as described above, the scraper 28 may be formed in a rod shape in a side view as shown in FIGS. 6 and 7. In this case, the rotation of the claw shaft 14 is performed. The effect of guiding to the outside such as straw and weeds is small, but other effects can be obtained as described above.

[0017]

According to the structure of the present invention configured as described above, when straw, weeds, or the like is wound near the bearing portion of the rotary claw shaft during tillage work or the like, the wrapped straw, The effect that straw and weeds come into contact with the scraper on the bearing part side when the weeds rotate with the claw shaft side and are detached from the claw shaft side, preventing the winding of straw and weeds on the claw shaft side, etc. There is.

At this time, since the scraper is provided not on the claw shaft side but on the work machine frame side and the lower end of the holder does not protrude toward the field compared to the lower end of the adjacent flange, the tilling is performed. Even when the depth is relatively large, the scraper does not come into contact with the field or is not inserted, and a deeper tillage depth can be set.

Further, since the scraper also functions as a rib of the bearing portion, that is, the reinforcing rib and the scraper are integrally formed, so that the bearing portion can have a compact and simple structure. . In addition, by forming the scraper in a chevron shape, the scraper guides straw or weeds in a direction to remove from the claw shaft side with the rotation of the claw shaft, so that the straw or weeds can be easily detached from the claw shaft side. In addition to the above, even when the rotation direction of the claw shaft is either the forward direction or the reverse direction, the above effect can be obtained by guiding straw, weeds, and the like in the direction of removing the straw or weed from the claw shaft side with the rotation of the claw shaft.

[Brief description of the drawings]

FIG. 1 is a side view of a rear part of a tractor.

FIG. 2 is a rear view of a main part of the rotary working machine.

FIG. 3 is a sectional view of a main part of a bearing portion on the side frame side.

FIG. 4 is a side view of a main part of a side frame.

FIG. 5 is an exploded perspective view of a main part showing a state in which the support shaft is supported by a bearing.

FIG. 6 is a cross-sectional view of a main part of a bearing portion on a side frame side according to another embodiment.

FIG. 7 is a side view of a main part of a side frame according to another embodiment.

[Explanation of symbols]

 5 Working Machine Frame 14 Claw Shaft 14a Flange 15 Tilling Claw (Rotating Claw) 17 Bearing 19 Supporting Shaft (Shaft) 19a Flange 20 Rotary 23 Bearing 24 Holder 28 Scraper

Claims (3)

[Claims] A rotary (2) having a claw shaft (14) protruding from a peripheral surface of a rotary claw (15) for tilling work in a field.
0), and a bearing portion (17) for rotatably supporting both end portions of the claw shaft (14) is provided on the work machine frame (5) side, and the bearing portion (17) is provided with a bearing ( 23)
And the working machine frame (5) containing the bearing (23).
And a holder (24) fixed to the side, and a claw shaft (14).
In the rotary working machine provided with a flange near the holder (24), a rib-shaped scraper (28) for scraping off straw and weeds at the end of the claw shaft (14) is attached to the holder (2).
4) Holder (24) so as to be located between and the flange
The scraper (28) has a flange-side end face that is close to the flange, and the bearing (17) is positioned such that the lower end does not protrude from the lower end of the flange toward the field. The rotary support structure of the arranged rotary working machine. 2. A flange (14) is provided at both ends of the claw shaft (14).
a) is provided, and is fixed to at least one end of the claw shaft (14) via the flanges (14a) and (19a) of each other, and is rotatably supported by the bearing portion (17). The rotary support structure of a rotary working machine according to claim 1, wherein a shaft (19) is provided, and an end surface of the scraper (28) is brought close to a flange (19a) of the shaft (19). 3. The scraper (28) is formed in a mountain shape in a side view, and the straw or weed at the end side of the claw shaft (14) is guided outward in both forward and reverse rotation directions of the claw shaft (14). A rotary support structure in the rotary working machine according to claim 1 having a structure.