JP5981375B2 - Prevention mechanism of cigarettes in rotary tillers - Google Patents

Description

  The present invention relates to an anti-cigarette prevention mechanism for a rotary tiller.

For example, in a side-drive rotary tiller, a number of claw brackets having fitting recesses at the tip are provided on the outer peripheral surface of the claw shaft that is supported rotatably around the shaft center in the radially outward direction of the claw shaft. The tilling claw is protruded radially outward from the claw shaft by fixing the base end portion of the tilling claw fitted in the fitting recess to the claw bracket.
The claw shaft is provided with a grass winding prevention mechanism in which a long linear member is installed between the claw brackets at both ends of the claw shaft in the claw axis direction in order to prevent the grass or the like from being wrapped around the claw shaft. Yes.

  As a prior art of this cigarette-wrap preventing mechanism, there is one disclosed in Patent Document 1. In this prior art, male screws are formed at both ends of a long steel plate, and a support member provided in the claw bracket has a support hole or a support hole and an insertion groove extending from the support hole to the outer surface of the support member. By forming a mating groove, inserting the male screw into the support hole from the hole center direction or into the engaging groove from the claw shaft diameter outward direction, and fastening two nuts to be screwed into the male screw, Both ends are constructed on the support member.

Japanese Patent No. 4138273

The prior art is a useful technique in which the position of the end of the steel plate relative to the support member can be adjusted and the steel plate can be pulled by rotating a nut screwed into the male screw. Since it is the same nut fastening structure, the fastening work is very troublesome.
An object of the present invention is to provide a mechanism for preventing the weeding of a rotary tiller that can solve such problems of the prior art.

  It is an object of the present invention to provide a mechanism for preventing the winding of a rotary tiller that can easily and easily construct an end portion of a linear member for preventing the winding.

Specific means for solving the problems in the present invention are as follows.
First, on the outer peripheral surface of the claw shaft 2 supported so as to be rotatable about the axis, a plurality of claw brackets 4 for mounting the tilling claw 3 spaced apart in the claw axis direction and the circumferential direction are fixed, and the claw axis direction is fixed. It is a grass roll prevention mechanism of a rotary tiller in which a support member 6 is provided on each of the claw brackets 4 positioned on both ends, and both ends of a linear member 5 for preventing grass roll are attached to both support members 6,
The linear member 5 has an enlarged diameter end member 7 formed with a large-diameter tip enlarged portion 7b at the end, and an engagement hole 8 that engages the support member 6 with the enlarged diameter end member 7 in a detachable manner. Forming
The engagement hole 8 communicates with the enlarged diameter hole 8a into which the distal end enlarged portion 7b of the enlarged diameter end member 7 can be inserted, and the enlarged diameter hole 8a in the direction approaching the claw shaft 2 so that the distal enlarged portion 7b is removed. A retaining groove 8b through which the linear member 5 passes while being stopped ,
The support member 6 is attached to a claw axis direction surface of the claw bracket 4, and faces the claw shaft 2 in a radially outward direction, and has an outer peripheral surface portion 6 a that forms an enlarged diameter hole 8 a of the engagement hole 8, and a claw It has the side part 6b which faced the axial direction and formed the retaining groove 8b .

Secondly, the support member 6 is formed of a substantially U-shaped member in the circumferential direction of the claw shaft 2, and an outer peripheral surface portion 6 a is formed at a central side portion of the U-shaped member. One side is attached to the surface of the claw bracket 4 in the direction of the claw axis, and the side surface 6b is formed with a retaining groove 8b formed on the other side of the U-shaped member .
Thirdly, a plurality of claw brackets 4 for mounting the tilling claw 3 spaced apart in the claw axis direction and the circumferential direction are fixed to the outer peripheral surface of the claw shaft 2 supported so as to be rotatable about the axis, and the claw axis direction is fixed. It is a grass roll prevention mechanism of a rotary tiller in which a support member is provided on each of the claw brackets 4 positioned at both ends, and both ends of the linear member 5 for preventing grass roll are attached to both support members,
The linear member 5 has a large-diameter end member 7 having a large-diameter tip enlarged portion 7b formed at an end thereof, and is detachably engaged with the large-diameter end member 7 on one support member 6A of the support member. Engaging holes 8 are formed,
The engagement hole 8 communicates with the enlarged diameter hole 8a into which the distal end enlarged portion 7b of the enlarged diameter end member 7 can be inserted, and the enlarged diameter hole 8a in the direction approaching the claw shaft 2 so that the distal enlarged portion 7b is removed. A retaining groove 8b through which the linear member 5 passes while being stopped,
The one supporting member 6A is attached to the front surface of the claw bracket 4 in the rotational direction, faces the radially outer side of the claw shaft 2, and has an outer peripheral surface portion 6a that forms an enlarged diameter hole 8a of the engaging hole 8. It has the side part which faced the nail | claw axial direction and formed the retaining groove | channel 8b .

Fourth, the other support member 40 of the support member is disposed on the front surface of the claw bracket 4 in the rotational direction, and is engaged with the side wall facing the claw axis direction of the claw shaft 2 and opened to the outer surface. A groove 40A is formed .
Fifth, a plurality of claw brackets 4 for mounting the cultivation claw 3 on the outer circumferential surface of the claw shaft 2 supported so as to be rotatable about the axis center and spaced apart in the claw axis direction and the circumferential direction are fixed. It is a grass roll prevention mechanism of a rotary tiller in which a support member is provided on each of the claw brackets 4 positioned at both ends, and both ends of the linear member 5 for preventing grass roll are attached to both support members,
The linear member 5 has a large-diameter end member 7 having a large-diameter tip enlarged portion 7b formed at an end thereof, and is detachably engaged with the large-diameter end member 7 on one support member 6A of the support member. Engaging holes 8 are formed,
The engagement hole 8 communicates with the enlarged diameter hole 8a into which the distal end enlarged portion 7b of the enlarged diameter end member 7 can be inserted, and the enlarged diameter hole 8a in the direction approaching the claw shaft 2 so that the distal enlarged portion 7b is removed. A retaining groove 8b through which the linear member 5 passes while being stopped,
The one supporting member 6A is disposed around the tilling claw 3 and attached to the claw bracket 4, and includes an outer peripheral surface portion 6a in which a diameter expansion hole 8a of the engagement hole 8 is formed, and a retaining groove 8b. And a formed side surface portion.

ADVANTAGE OF THE INVENTION According to this invention, the edge part of the linear member for preventing a cigarette can be attached easily and easily.
That is, according to the first aspect of the present invention, the large-diameter tip enlarged portion 7b is formed at the end of the linear member 5, and the enlarged-diameter hole 8a and the retaining groove 8b are formed in the engagement hole 8 of the support member 6. Therefore, after inserting the tip enlarged portion 7b into the diameter-expanded hole 8a and passing the linear member 5 from the diameter-expanded hole 8a through the retaining groove 8b, the end of the linear member 5 is moved to the end in the nail axial direction. The support member 6 can be easily and easily engaged, and the construction work of the linear member 5 can be simplified. In particular, since the engagement is completed simply by hooking the end of the linear member 5 on the support member 6, it is also advantageous for the engagement work in the field where mud adheres.

In the invention according to claim 1 , the support member 6 faces the radially outer direction of the claw shaft 2 and faces the outer peripheral surface portion 6 a in which the enlarged diameter hole 8 a of the engagement hole 8 is formed, and the claw shaft direction. Since it has the side surface part 6b in which the retaining groove 8b is formed, the engagement of the enlarged diameter end member 7 to the support member 6 is easy, and the expanded diameter end member 7 can be reliably prevented from coming off.

In the invention according to claim 2 , since the support member 6 is formed of a substantially U-shaped member, it can be formed robustly and inexpensively.

1 is a perspective view showing a first embodiment of the present invention. It is a disassembled front view of a cigarette prevention mechanism. It is a top view of an anti-cigarette prevention mechanism. It is a front view of the principal part. FIG. 5 is a sectional view taken along line XX in FIG. 4. It is a partial cross section side view of a rotary tiller. It is a perspective view which shows 2nd Embodiment of this invention. It is a perspective view which shows the 1st reference example of a cigarette prevention mechanism. It is a perspective view which shows the reference example of a grass cutting nail. It is a perspective view which shows the 2nd reference example of a cigarette prevention mechanism.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In FIG. 6, reference numeral 1 denotes a rotary cultivator that is mounted on the rear portion of the tractor via a three-point link mechanism 12 and a connecting frame 13 so as to be movable up and down. The connecting frame 13 is a special type of rotary cultivator with a standard three-point link specification. A rotary cultivator with a three-point link specification can be mounted alternatively.
The connecting frame 13 is connected to the rear end of the three-point link mechanism 12, and a pair of upper and lower upper engaging portions 14a and 14b are provided at the upper portion, a lower engaging portion 15 is provided at the lower left and right portions, and a joint is provided at the upper and lower middle portions. A shaft holder 16 is provided, and a first type (for example, special three-point link specification) work machine and a second type (for example, standard three-point link specification) work machine are selectively detachably connected. In addition, a joint shaft 18 that connects the PTO shaft and the PIC shaft 17 is held by a joint shaft holder 16.

  In the rotary tiller 1, a left and right support arm 23 is connected to a gear case 22 projecting forward from the PIC shaft 17, and a transmission case 24 and a side frame 25 are connected to the outer ends of the left and right support arms 23 to form a rotary machine frame 26. An upper engagement pin 28 that engages with the upper engagement portion 14a or 14b is provided on the top mast 27 provided on the upper portion of the gear case 22, and the lower engagement portion is mounted on the bracket 30 that protrudes forward from the left and right support arms 23. A lower engagement pin 29 that engages with 15 is provided.

The claw shaft 2 is rotatably supported between the transmission case 24 of the rotary machine frame 26 and the lower portion of the side frame 25, and a large number of claw brackets 4 are fixed to the claw shaft 2.
Is attached to form a tilled portion K.
The transmission case 24 and the side frame 25 are provided with a main cover 33 that covers the top of the tillage portion K, and a rear cover 35 is pivotally supported on the rear portion of the main cover 33 via a horizontal shaft 34. The rear cover 35 includes an upper rear cover 35U and a lower rear cover 35D, and is connected by a connecting shaft 36 in the left-right direction so that the angle can be adjusted.

A number of claw brackets 4 fixed to the outer peripheral surface of the claw shaft 2 are spaced apart from each other in the claw axis direction and the circumferential direction, and the claw brackets 4 are fitted with U-shaped members having different sizes. The base of the tillage nail 3 is inserted in the inside, the bolt is penetrated through them, and the tillage nail 3 is attached to them.
The claw brackets 4 at both ends of the claw shaft 2 in the claw axis direction are provided with support members 6 (6A, 6B) on the opposite side in the claw axis direction, and both ends of the linear member 5 are installed on the support members 6 at both ends. The anti-winding mechanism 10 is configured.

A first embodiment of the cigarette winding prevention mechanism 10 is shown in FIGS.
The said linear member 5 has the metal enlarged diameter end members 7 (7A, 7B) in the both ends of the steel plate part 5A formed with the rod-shaped steel material or the wire. Both the enlarged diameter end members 7A and 7B have a shaft portion 7a and a spherical tip enlarged portion 7b having a diameter larger than that of the shaft portion 7a.
The diameter-enlarging end member 7A on the support member 6A side has the end portion of the shaft portion 7a connected to the steel plate portion 5A by caulking or welding.

The enlarged diameter end member 7B on the support member 6B side has a male screw 7c formed on the shaft portion 7a, and a female screw member 5B provided on the end of the steel rod portion 5A. The female screw member 5B is screwed onto the male screw 7c. In combination, the lock nut 11 is used to stop the rotation, and the length adjusting means 9 is constituted by these.
The length adjusting means 9 adjusts the screwing position of the female screw member 5B and the male screw 7c by rotating the enlarged diameter end member 7B around the axis, thereby increasing the tension of the linear member 5. Can be adjusted.

The support members 6A and 6B at both ends are symmetrical to each other, have engagement holes 8 that are detachably engaged with the enlarged diameter end members 7A and 7B, and are provided on the opposite side of the claw bracket 4 in the claw axis direction. It is fixed to the surface.
The supporting members 6A and 6B at both ends are formed of a substantially U-shaped member in the circumferential direction of the claw shaft 2, and an outer peripheral surface portion 6a is formed at the central side portion of the U-shaped member, and one side of the U-shaped member The portion (fixed portion 6c) is fixed to the surface of the claw bracket 4 in the claw axis direction, and the side surface portion 6b is formed on the other side portion of the U-shaped member.

The outer peripheral surface portion 6a of the U-shaped support member 6 (6A, 6B) is formed with an enlarged diameter hole 8a into which the spherical distal end enlarged portion 7b of the enlarged diameter end member 7 (7A, 7B) can be inserted. A retaining groove 8b is formed from 6a to the side surface portion 6b, and an engagement hole 8 is formed by the enlarged diameter hole 8a and the retaining groove 8b.
The retaining groove 8b communicates with the distal end enlarged portion 7b, and the width of the retaining groove 8b passes through the shaft portion 7a, but does not pass through the enlarged diameter hole 8a, that is, is dimensioned to prevent removal.

As shown by a two-dot chain line in FIG. 2, when the enlarged diameter end member 7 at the end of the linear member 5 is brought closer to the support member 6 from the outside of the diameter, and the distal end enlarged portion 7b is inserted into the enlarged diameter hole 8a. The shaft portion 7a also enters the retaining groove 8b, and when the tip enlarged portion 7b is pulled inward from the diameter expanding hole 8a, the tip enlarged portion 7b cannot be removed from the retaining groove 8b in the direction of the nail axis. Become.
After engaging the enlarged diameter end members 7A and 7B at both ends of the linear member 5 with the opposite end support members 6A and 6B, the linear adjusting member 9A and 7B are pulled by the length adjusting means 9 to pull the linear end members 7A and 7B. 5 is stretched over the both-end claw bracket 4 in a stretched state.

FIG. 7 shows a second embodiment of the anti-cigarette prevention mechanism.
In the cigarette winding prevention mechanism 39 of the second embodiment, the support member 6A and the enlarged diameter end member 7A on one end side in the claw axis direction are provided on the support member 6A in the same manner as the cigarette winding prevention mechanism 10 of the first embodiment. An engagement hole 8 having an enlarged diameter hole 8a and a retaining groove 8b is formed, and an enlarged end member 7A is formed with a cylindrical tip enlarged portion 7b at the tip of the shaft portion 7a.

The substantially L-shaped support member 40 in the radial direction on the other end side in the claw axis direction forms an engagement groove 40 </ b> A opened on the outer surface on the side wall facing the claw axis direction of the claw axis 2. The engagement groove 40 </ b> A may be formed by a through hole instead of the groove when a wire is used for the linear member 5.
A male screw 41 is provided at the other end of the linear member 5. The male screw 41 is inserted into the engaging groove 40 </ b> A of the support member 40, and the nut 42 is screwed to the support member 40 with the engaging groove 40 </ b> A interposed therebetween. It is concluded. The linear member 5 can be tightened and the other end can be attached and detached by adjusting the positions of the two nuts 42 with the male screw 41 installed on the support member 40. The male screw 41 and the two nuts 42 constitute the length adjusting means 9.

The support member 40 is disposed on the front surface in the rotation direction of the claw bracket 4, and the engagement groove 40 </ b> A has a groove shape into which the male screw 41 is inserted from the front side in the rotation direction of the claw shaft 2. The engagement groove 40 </ b> A may have a groove shape in which the male screw 41 is inserted from the radially outward direction of the claw shaft 2, and in this case, the support member 40 can be disposed on the rear surface in the rotation direction of the claw bracket 4.
The support member 6A and the support member 40 are fixed to the front surface in the rotational direction of the claw bracket 4 so that the linear member 5 is engaged with the back of the retaining groove 8b and the engagement groove 40A.

Since the diameter of the expanded diameter hole 8a of the support member 6A is directed to the radial direction of the claw shaft 2, the expanded diameter end member 7 of the linear member 5 has a cylindrical body and the diameter of the expanded core is the axis of the distal end expanded portion 7b. It is inserted into the enlarged diameter hole 8a from the outside of the diameter in accordance with the hole center of 8a.
When the shaft portion 7a is moved along the claw axis direction of the claw shaft 2 with the distal end enlarged portion 7b of the diameter-expanded end member 7 penetrating the diameter-expanded hole 8a, the shaft portion 7a comes out of the diameter-expanded hole 8a. Transition to the stop groove 8b. When the shaft portion 7a enters the retaining groove 8b, the cylindrical tip enlarged portion 7b contained in the supporting member 6A cannot be removed from the retaining groove 8b, and one end of the linear member 5 becomes the supporting member 6A. It will be in a erected state.

FIG. 8 shows a first reference example of the mechanism for preventing cigarette winding, and the support member 45 has an insertion hole 45a through which the base of the tillage claw 3 is inserted into a flat plate, and a U metal fitting 46 provided at the end of the linear member 5. A stop hole 45b through which a pin 47 is inserted is formed, and is welded to the tip of the claw bracket 4 (outer diameter end as viewed from the claw shaft 2).
Since the support member 45 of the first reference example is welded to the claw bracket 4, the tilling claw 3 can be replaced in a state where the mechanism for preventing cigarette winding is assembled to the claw shaft 2.

Reference numeral 48 denotes a grass claw, which is disposed on the outer surface of the claw bracket 4 and fixed with a bolt for attaching the tilling claw 3.
FIG. 9 shows a reference example of the grass cutting claw 48, in which the support member 45 and the grass cutting claw 48 of the first reference example are integrally formed. By welding the support member 45 to the claw bracket 4, FIG. The grass cutting claw 48 is also fixed to the claw bracket 4. That is, the grass cutting claw 48 has two orthogonal surfaces, and a through hole 48a through which the tilling claw 3 is inserted and a stop hole 48b through which the pin 47 is inserted are formed on one surface, and a cutting blade 48c is formed on the other surface. Has been.

FIG. 10 shows a second reference example of the mechanism for preventing cigarette winding, and the support member 49 is a stop for inserting a pin 47 (shown in FIG. 8) for stopping the U metal fitting 46 provided at the end of the linear member 5. The flat plate in which the hole 49 b is formed is welded to the outer surface tip of the claw bracket 4.
Since the support member 49 of the second reference example is also welded to the claw bracket 4, the tilling claw 3 can be replaced in a state where the mechanism for preventing cigarettes is assembled to the claw shaft 2.

In the present invention, the shape of each member and the positional relationship between the front, rear, left, and right in the above embodiment are best configured as shown in FIGS. However, it is not limited to the said embodiment, A member, a structure can be variously deformed, and a combination can also be changed.
For example, the support members 6A and 6B are fixed to the claw bracket 4 by welding, but may be configured such that each mounting piece protrudes and is fixed to the outer surface of the claw bracket 4 with a bolt for fixing the tilling claw 3. .

  The linear member 5 may be used as the enlarged diameter end member 7 by welding a sphere (tip enlarged portion 7b) to the end of a rod-shaped steel material or wire.

DESCRIPTION OF SYMBOLS 1 Rotary tiller 2 Claw shaft 3 Claw claw 4 Claw bracket 5 Linear member 5A Steel rod part 5B Female screw member 6 (6A, 6B) Support member 6a Outer peripheral surface part 6b Side surface part 6c Fixed part 7 (7A, 7B) Expanded diameter End member 7a Shaft portion 7b End enlarged portion 7c Male screw 8 Engagement hole 8a Diameter expansion hole 8b Retaining groove 9 Length adjusting means 10 Prevention mechanism 11 Lock nut K Tillage portion

Claims (5)

A large number of claw brackets (4) for mounting a tilling claw (3) spaced apart in the claw axis direction and the circumferential direction are fixed to the outer peripheral surface of the claw shaft (2) supported so as to be rotatable about an axis. A rotary tiller in which claw brackets (4) positioned on both ends in the axial direction are provided with support members (6), and both ends of a linear member (5) for preventing cigarettes are attached to both support members (6). Cigarette prevention mechanism,
The linear member (5) has a large-diameter end member (7) in which a large-diameter tip enlarged portion (7b) is formed at the end, and the support member (6) is engaged with the large-diameter end member (7). An engagement hole (8) that is detachably engaged is formed,
The engagement hole (8) has a diameter-enlarged hole (8a) into which a distal-end enlarged portion (7b) of the diameter-expanded end member (7) can be inserted, and approaches the claw shaft (2) from the diameter-enlarged hole (8a). And a retaining groove (8b) through which the linear member (5) passes while preventing the tip enlarged portion (7b) from slipping .
The support member (6) is attached to a claw axis direction surface of the claw bracket (4), faces the radial direction of the claw shaft (2), and has an enlarged diameter hole (8a) of the engagement hole (8). ) And an outer peripheral surface portion (6a) having a side surface (6b) facing in the direction of the nail axis and having a retaining groove (8b). Anti-stick mechanism. The support member (6) is formed of a substantially U-shaped member in the circumferential direction of the claw shaft (2), and an outer peripheral surface portion (6a) is formed at the central side portion of the U-shaped member. One side of the member is attached to the surface of the claw bracket (4) in the direction of the claw axis, and the side surface (6b) is formed with a retaining groove (8b) formed on the other side of the U-shaped member. A mechanism for preventing the winding of the rotary tiller according to claim 1 . A large number of claw brackets (4) for mounting a tilling claw (3) spaced apart in the claw axis direction and the circumferential direction are fixed to the outer peripheral surface of the claw shaft (2) supported so as to be rotatable about an axis. In the rotary tiller anti-winding mechanism of the rotary tiller in which the support members are provided on the claw brackets (4) positioned on both ends in the axial direction, and both ends of the linear member (5) for preventing the winding of the grass are attached to both support members. There,
The linear member (5) has an enlarged diameter end member (7) in which a large diameter enlarged end portion (7b) is formed at an end portion, and an enlarged diameter end member is provided on one support member (6A) of the support member. An engagement hole (8) is formed which is detachably engaged with (7);
The engagement hole (8) has a diameter-enlarged hole (8a) into which a distal-end enlarged portion (7b) of the diameter-expanded end member (7) can be inserted, and approaches the claw shaft (2) from the diameter-enlarged hole (8a). And a retaining groove (8b) through which the linear member (5) passes while preventing the tip enlarged portion (7b) from slipping.
The one support member (6A) is attached to the front surface in the rotational direction of the claw bracket (4), faces the radially outward direction of the claw shaft (2), and has a diameter-enlarged hole (8) in the engagement hole (8). 8a) an outer peripheral surface portion (6a) and a side surface portion facing the claw axis direction and having a retaining groove (8b), preventing the weeding of the rotary tiller mechanism. The other support member (40) of the support member is disposed on the front surface of the claw bracket (4) in the rotational direction, and is opened to the outer surface on the side wall facing the claw axis direction of the claw shaft (2). The engagement groove | channel (40A) is formed , The grass roll prevention mechanism of the rotary tiller of Claim 3 characterized by the above-mentioned. A large number of claw brackets (4) for mounting a tilling claw (3) spaced apart in the claw axis direction and the circumferential direction are fixed to the outer peripheral surface of the claw shaft (2) supported so as to be rotatable about an axis. In the rotary tiller anti-winding mechanism of the rotary tiller in which the support members are provided on the claw brackets (4) positioned on both ends in the axial direction, and both ends of the linear member (5) for preventing the winding of the grass are attached to both support members. There,
  The linear member (5) has an enlarged diameter end member (7) in which a large diameter enlarged end portion (7b) is formed at an end portion, and an enlarged diameter end member is provided on one support member (6A) of the support member. An engagement hole (8) is formed which is detachably engaged with (7);
  The engagement hole (8) has a diameter-enlarged hole (8a) into which a distal-end enlarged portion (7b) of the diameter-enlarged end member (7) can be inserted, and the diameter-enlarged hole (8a) approaches the claw shaft (2). And a retaining groove (8b) through which the linear member (5) passes while preventing the tip enlarged portion (7b) from slipping.
  The one supporting member (6A) is arranged around the tilling claw (3) and attached to the claw bracket (4) to form an enlarged diameter hole (8a) of the engaging hole (8). A grass-rolling prevention mechanism for a rotary tiller characterized by having an outer peripheral surface portion (6a) and a side surface portion formed with a retaining groove (8b).

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