JP2005287519A - Tine member for rotary tillage apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tine member for a rotary tillage apparatus, enabling various kinds of tillages to be carried out by properly setting the tine part, and enabling the setting to be easily changed. <P>SOLUTION: The tine member has a base part 20 and a tine part 21 separately installed in different bodies. Slots 22 and a fitting hole 23 are bored in the base part 20, and a contact part 50 and two base holes 52 are bored in the upper part. Two attaching holes 53 corresponding to the two base holes 52 are bored at the lower part in the tine part 21, and a cut part 51 is formed between the attaching holes 53. The attaching angle of the tine part 21 can be changed between an angle at which the lower part of the tine part 21 is stuck to one surface of the base part 20, and fixed by a fixing member by adjusting the base hole 52 to the attaching hole 53, and an angle at which the tine part 21 is attached to the base part 20 so as to span the contacting part 50 by the cut part 51 by the fixing member. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a rotary tiller claw member used for a forward / reverse rotary tiller and the like.

  With forward and reverse rotary tillers, it is necessary to reduce the resistance when cutting by making the tilling nail cut into the soil in order from the root side at the time of downcut, and in the direction opposite to the traveling direction of the equipment at the time of upcut It is necessary to take countermeasures because the tillage claws rotate in the cultivated soil and receive greater resistance than during downcutting.

  If you use a tilling nail that is curved from the root to the back for down-cutting, it is not possible to use it as it is with up-cutting, so it is necessary to replace the tilling nail. It is considered to be formed into a shape and swing in the rotational direction. For example, Patent Document 1 describes that a claw mounting flange that extends in a direction perpendicular to the rotary axis is fixed, and a work claw that has blade edges formed on both side edges by pivot pins at the tip is pivotally attached. ing. The work claw is regulated to be swingable by a predetermined angle by a stopper provided on the claw mounting flange. Patent Document 2 describes that a bracket is fixed in a direction substantially perpendicular to the nail axis, and a tilling claw is attached to the bracket so that the bracket can be swung around a fulcrum. Down-cutting blades and up-cutting blades are curved on both side edges to reduce the resistance during cutting.

Further, in Patent Document 3, a holder is fixed to a tilling shaft, a mounting base of a tilling claw is fitted into the holder, a pin is inserted between the mounting base and the holder to prevent the mounting base, and the mounting base is inserted into the holder. A point that a presser spring to be pressed is attached to suppress the rattling of the tilling nail is described.
Japanese Examined Patent Publication No. 6-75441 Japanese Patent Publication No. 6-12961 Japanese Patent No. 3264730

  In the conventional techniques as described above, since the tilling claws are attached to the flange and the bracket fixed to the rotary shaft, the mounting position is fixed. Therefore, it is difficult to set according to the condition of cultivated soil. Moreover, since the attachment of the tilling nail to the flange or the bracket is pivotally supported by the pin, it is inevitable that the rattling occurs during use. Although it is conceivable to use a presser spring as in Patent Document 3, the structure becomes complicated, and if it is used for a long period of time, it will eventually become rattled.

  Then, this invention aims at providing the nail | claw member for rotary tillers which can perform various tillage by setting a nail | claw part suitably and can also change the setting easily. .

  A claw member for a rotary tiller according to the present invention is for a rotary tiller comprising a base attached to a shaft, a claw separate from the base, and a fixing member for fixing the claw to the base. A claw member, wherein the base has two base holes that are penetrated at a predetermined interval, and a contact portion is formed between the two base holes. And having two mounting holes drilled through at a predetermined interval and having a notch formed between the two mounting holes, and the fixing member is inserted into the base hole and the mounting hole The claw portion is a member that fixes the claw portion to the base portion, and the claw portion is mounted on the base portion so as to straddle the contact portion at the notch portion, and can be fixed by the fixing member. To do.

  By having the configuration as described above, the claw portion is set when the claw portion is fixed to one surface of the base portion and when the claw portion is mounted and fixed so as to straddle the abutting portion of the base portion. can do. That is, when one surface of the base is along the traveling direction of the tilling device and is fixed across the claw portion, the claw portion is set obliquely with respect to the traveling direction, and is inclined outward. If it is set to, the nail part plows and collects the soil in the outward direction, and if it is set obliquely inward, the nail part plows and collects the soil in the inward direction. Various tillage can be performed by appropriately setting, and the setting can be easily changed. In particular, since it is inclined from the base of the claw part, the reversal of the cultivated soil is improved, and for example, a ditching operation can be performed efficiently.

  FIG. 1 is a schematic view of the entire forward / reverse rotary device. An airframe 1 attached to a tractor (not shown) so as to be able to move up and down includes a gear box 2 at the center, a lateral frame 3 extending laterally therefrom, a transmission shaft frame 4, and a support frame 5 provided depending on the lateral frame 3. The chain frames 7 provided so as to hang down from the transmission shaft frame 4 are respectively attached. A gear mechanism 10 such as a bevel gear for transmitting a driving force from a tractor driving device (not shown) is housed in the gear box 2, and a transmission shaft 11 is pivotally supported in the transmission shaft frame 4. . A sprocket 12 is fixed to the end of the transmission shaft 11 in the chain frame 7. On the other hand, a rotary shaft 15 mounted horizontally between the support frame 5 and the chain frame 7 is pivotally supported. A sprocket 14 fixed to the rotary shaft 15 is accommodated in the chain frame 7. Yes. A chain 13 is suspended from the sprocket 12 and the sprocket 14. A plurality of claw members 16 to be described later are fitted to the rotary shaft 15, and a cylindrical body 17 is fitted between the claw members 16 to maintain a predetermined interval.

  A driving force from a tractor (not shown) is appropriately switched between forward and reverse rotation by the gear mechanism 10 and transmitted to the transmission shaft 11. When the sprocket 12 is rotated by the rotation of the transmission shaft 11, the rotary shaft 15 is rotated via the chain 13 and the sprocket 14. As the rotary shaft 15 rotates, the claw member 16 rotates around the rotary shaft 15 to cut the cultivated soil. A cover 18 is disposed on the upper portion of the claw member 16 so as to cover the entire claw member 16, and prevents stones and the like from scattering during plowing.

  FIG. 2 is an exploded perspective view showing the structure of the tillage claw attachment device. The rotary shaft 15 is formed so that the cross-sectional shape is a regular hexagon. The claw member 16 includes a base portion 20 and a claw portion 21. FIG. 3 shows a front view and a side view of the claw member 16, and the base 20 has a fitting hole 23 that fits into the rotary shaft 15 at the center, and the fitting hole 23 is The shape of the rotary shaft 15 is substantially the same as the circumference connecting the vertices of the regular hexagon that is the cross-sectional shape of the rotary shaft 15. The base 20 has three long holes 22 around the fitting hole 23, and each long hole 22 has a circumference drawn with a predetermined radius around the axis of the rotary shaft 15. Along this, an arc shape having a predetermined width is formed. And the shape of each long hole 22 is the same, and it has shifted | deviated 120 degree | times and formed. The nail | claw part 21 is integrated with the base 20, and the front-end | tip part curves by the plate shape extended to the upper part of the base 20, and forms the rake part at the time of tillage. Blade portions are formed on both side edges of the claw portion 21, and the blade portion comes into contact with the cultivated soil at the time of down cut and up cut. The outer shape other than the portion where the claw portion of the base portion 20 is integrated is formed in a circular shape centering on the axis of the rotary shaft 15.

  As shown in FIG. 2, the rotating member 24 is fitted to the rotary shaft 15 on both sides of the claw member 16, and is attached in close contact with the base portion 20 of the claw member 16 when attached. As shown in FIG. 4, the rotation member 24 is provided with a mounting hole 27 having a shape substantially coinciding with a regular hexagon that is a cross-sectional shape of the rotary shaft 15 at the center. Three holes 26 are formed around the mounting hole 27, and each hole 26 has a shape into which a long rod-shaped member 28 described later can be inserted. And each hole part 26 is shifted | deviated 120 degree | times so that it may oppose to each long hole 22 of the nail | claw member 16 at the time of mounting | wearing. The outer periphery of the rotating member 24 has a disk shape that is substantially the same as the circular shape of the base 20 of the claw member 16, and the contact surface of the claw member 16 with the base 20 is flat. A flange portion 25 is formed concentrically smaller than the outer periphery on the surface opposite to the contact surface.

  When the rotary shaft 15 is mounted, a plurality of units are mounted with a group in which the rotating member 24 is in close contact with both sides of the claw member 16 as a unit, and a cylindrical body 17 is fitted between each unit. Is kept at an interval. The cylindrical body 17 is held by fitting both ends thereof into the flange portion 25 of the rotating member 24. Three long rod-shaped members 28 pass through the hole 26 of the rotating member 24 of each unit and the corresponding long hole 22 of the claw member 16. Each rod-shaped member 28 is formed in a bolt shape, a head is formed at one end, and a screw groove is formed at the other end. A nut is screwed into a thread groove protruding through the hole 26 of the rotation member 24 located on the outermost side so that the claw member 16, the rotation member 24 and the cylinder body 17 are held in close contact with each other. To do.

  The claw member 16 mounted as described above has a shape in which the fitting hole 23 substantially coincides with the circumference connecting the vertices of the regular hexagon that is the cross-sectional shape of the rotary shaft 15, and thus rotates around the rotary shaft 15. Although the rod-shaped member 28 is loosely fitted in the long hole 22 of the base portion 20 as shown in FIG. 5, the rod-shaped member 28 is restricted by the arc-shaped length of the long hole 22 as shown in FIG. It is supposed to be movable. Since the mounting hole 27 of the rotating member 24 has the same regular hexagonal shape as the cross-sectional shape of the rotary shaft 15, the rotating member 24 rotates following the rotary shaft 15, and the hole 26 of the rotating member 24 is rotated. The held rod-shaped member 28 rotates together with the rotating member 24. Therefore, the claw member 16 rotates around the rotary shaft 15 with the rod-shaped member 28 engaged with the end of the long hole 22.

  When the claw member 16 rotates around the rotary shaft 15 and touches the cultivated soil, as described above, the claw member 16 can rotate by the arc-shaped length of the long hole 22 and is thus pressed against the cultivated soil once in the reverse direction. Then, the rod-shaped member 28 is engaged with the end of the long hole 22 and the rotational force of the rotary shaft 15 is transmitted to cut the cultivated soil. Since the same operation is performed in both cases of the down cut and the up cut, the resistance when the nail portion 21 of the nail member 16 is pushed into the cultivated soil can be reduced in any case, and the nail The load is not concentrated on the tip of the portion 21.

  As shown in FIG. 6, the claw portions 21 of the claw members 16 of each unit are shifted by 120 degrees as viewed from the axial direction of the rotary shaft 15 as shown in FIG. can do. When viewed from the whole, the claw portions 21 are arranged in a screw shape, and when the rotary shaft 15 is rotated in this mounted state, the respective claw portions 21 are sequentially pushed into the cultivated soil. As a result, the plowing work can be efficiently performed with a small horsepower.

  In the above example, the triple screw type in which the three claw portions 21 are shifted by 120 degrees has been described. However, as the angle at which the claw member is displaced in a screw shape is reduced, the angle at which the claw member can be rotated is reduced. Become. Therefore, an example will be described in which the angle at which the pawl member can be rotated is maintained as it is, and the angle of shifting to the screw shape can be reduced.

  FIG. 7 shows an exploded perspective view in the case of a six-unit screw. The claw member 16, the support disc 33, and the cylinder 17 are fitted to a support shaft 29 having a regular hexagonal cross-sectional shape. The support shaft 29 is formed in a cylindrical shape, and a cylindrical insertion portion 30 is extended at the end of the rotary shaft 15. By inserting the insertion portion 30 into one end of the support shaft 29, the support shaft 29 is inserted into the support shaft 29. The support shaft 29 is pivotally supported by the rotary shaft 15. In the base portion 20 of the claw member 16, a regular hexagonal fitting hole 31 substantially the same as the cross-sectional shape of the support shaft 29 is formed in the center portion, and the periphery of the fitting portion 31 is centered on the axis of the support shaft 29. Six positioning holes 32 are formed by shifting by 60 degrees along the circumference. The support disc 33 is formed with a regular hexagonal through-hole 35 substantially the same as the cross-sectional shape of the support shaft 29, and the circumference thereof is shifted by 120 degrees to the same position on the circumference as the positioning hole portion 32 described above. A hole 34 is bored. The outer periphery of the support disc 33 has a disk shape substantially the same as the circular shape of the base portion 20 of the claw member 16, and the contact surface with the base portion 20 of the claw member 16 is flat. A flange portion 36 is formed concentrically smaller than the outer periphery on the surface opposite to the contact surface.

  The support disk 33 is mounted so as to be in close contact with the base 20 of the claw member 16 from both sides, and the three holes 34 of the support disk 33 are selected every other one of the six positioning holes 32 of the base 20. Are mounted so as to coincide with the three positioning holes 32. A plurality of units are fitted to the support shaft 29 with one claw member 16 and two support disks 33 as one unit. If the claw portions 21 of the claw members 16 of each unit are shifted by 60 degrees with respect to the support shaft 29 and fitted, it can be mounted in a screw shape as seen from the axial direction of the support shaft 29 as shown in FIG. . And the cylinder 17 is fitted between each unit, and the both ends of the cylinder 17 are fitted to the flange part 36 of the support disc 33, and a predetermined space | interval is maintained.

  Three long support rods 48 are inserted into the three hole portions 34 of the support disk 33 of each unit and the positioning hole portion 32 of the base portion 20 of the claw member 16 corresponding to the three holes 34 so as to be substantially parallel to the support shaft 29. It is supported by. One end of each support bar 48 is formed in the shape of a bolt head, and the other end is formed with a screw groove. A cover member 45 is fitted to the support shaft 29 at the outermost end portion of the support shaft 29 on the rotary shaft 15 side. The cover member 45 has a circular shape and covers an operation member 37 described later. In addition, a regular hexagonal through-hole 47 that substantially matches the cross-sectional shape of the support shaft 29 is formed in the center thereof, and the three holes through which the three support rods 48 described above pass are formed around the through-hole 47. A portion 46 is drilled.

  On the other hand, the rotary shaft 15 is formed in a regular hexagonal cross section, and the insertion portion 30 is formed at the end portion as described above, and the support shaft 29 is pivotally supported. A disk-shaped operating member 37 and a rotating member 41 are fitted to the rotary shaft 15. The operating member 37 has a fitting hole 39 that fits into the rotary shaft 15 at the center, and the fitting hole 39 is substantially the same as the circumference connecting the vertices of the regular hexagon that is the sectional shape of the rotary shaft 15. Matched shape. Therefore, the operating member 37 is rotatable around the rotary shaft 15. In addition, three long holes 38 are formed around the fitting hole 39, and each long hole 38 has a predetermined radius along a circumference drawn with a predetermined radius around the axis of the rotary shaft 15. It has an arc shape with a width. And the shape of each long hole 22 is the same, and it has shifted | deviated 120 degree | times and formed. Between each of the long holes 38 and the fitting hole 39, three screw holes 40 are formed for screwing and fixing screw grooves formed at the end portions of the three support rods 48, respectively. Yes.

  The rotating member 41 is mounted on the side opposite to the cover member 45 with the operating member 37 as the center, and is formed in a circular shape like the cover member 45, and is in close contact with the flange portion protruding around the cover member 45. Then, the operating member 37 is covered. A mounting hole 43 having substantially the same shape as the regular hexagon that is the cross-sectional shape of the rotary shaft 15 is formed in the central portion of the rotating member 41, and three hole portions 42 are operated around the mounting hole 43. Corresponding to the three long holes 38 formed in the member 37, the holes are shifted by 120 degrees. A rod-shaped member 44 is inserted into the three holes 42 and loosely fitted into the long hole 38, and a nut or the like is secured to the end of the rod-shaped member 44 to prevent the rod-shaped member 44 from coming off. Since the rod-shaped member 44 is loosely fitted in the long hole 38, the actuating member 37 is rotatable around the rotary shaft 15 by the arc-shaped length of the long hole.

  FIG. 9 shows an exploded front view of the vicinity of the joint between the rotary shaft 15 and the support shaft 29. The support shaft 29 is supported by inserting the insertion portion 30 of the rotary shaft 15. A support disk 33, a claw member 16, a support disk 33, a cylindrical body 17, and a cover member 45 are fitted in order to the support shaft 29, and are penetrated and connected by a support bar 48. An operating member 37 and a rotating member 41 are fitted to the rotary shaft 15, and both are connected by a rod-shaped member 44.

  When the rotary shaft 15 is rotated with the above configuration, the rotation member 41 is fitted to the rotary shaft 15 through the equilateral hexagonal mounting hole 43 and thus rotates following the rotary shaft 15. When the rotation member 42 is rotated, the rod-shaped member 44 inserted through the hole portion 42 follows and rotates. However, since the rod-shaped member 44 is loosely fitted in the elongated hole 38 of the operating member 37, the elongated hole 38. When the rod-shaped member 44 is locked to one end of the actuator member 37, the actuating member 37 follows and rotates. Since one end of each of the three support rods 48 is fixed to the operation member 37, the cover member 45, the support disk 33, the claw member 16 and the cylinder body 17 through which the support rod 48 is connected are integrated into the operation member. Rotate following 37. Therefore, when the rotary shaft 15 rotates and the claw member 16 comes into contact with the cultivated soil, it receives resistance from the cultivated soil and once rotates in the direction opposite to the rotary shaft 15, but the actuating member 37 is a long hole 38 and a rod-shaped member 44. Then, the claw member 16 is pushed into the cultivated soil and cuts the cultivated soil. Therefore, the resistance at the time of pushing in the claw member 16 can be reduced, and since the six claw members 16 can be arranged in a screw shape, it becomes possible to plow with better balance.

  FIG. 10 shows an exploded view of an embodiment according to the present invention. As shown in FIG. 10, the base 20 is provided with a long hole 22 and a fitting hole 23 as in FIG. 3, and a contact part 50 and two base holes 52 are provided in the upper part. . The claw portion 21 has two attachment holes 53 formed in the lower portion corresponding to the two base holes 52, and a notch 51 is formed between the attachment holes 53. As shown in FIG. 11, the lower portion of the claw portion 21 is brought into close contact with one surface of the base portion 20 so that the base hole 52 and the mounting hole 53 are aligned and fixed by the fixing member 54. As the fixing member 54, a bolt and a nut can be used, but it is not particularly limited as long as it can be fixed.

  In addition, as shown in FIG. 12, when the claw portion 21 is attached to the base portion 20 so as to straddle the contact portion 50 with the notch portion 51 and fixed with the fixing member 54, the claw portion 21 is inclined with respect to the base portion 20. Can be attached. When the claw portion 21 is attached obliquely in this way, when the claw portion 21 rotates, the cultivated soil can be gathered together on one side with respect to the traveling direction. Conventional claw members are also formed into a curved shape so as to twist with the aim of such effects, but are difficult to mold and cannot be twisted from the base. Since the claw member of the present invention can be easily processed and is attached obliquely from the root, the workability of tillage is improved. Further, since the mounting direction of the claw portion can be easily changed simply by removing the fixing member, the claw portion can be easily attached in a short time.

  FIG. 13 shows the base 20 when the base 20 and the claw 21 are separated from each other in the claw member 16 shown in FIG. Similarly to FIG. 10, the claw member 16 can be configured by attaching the claw portion 21 to the base hole 52. 14 and 15 show an example in which a contact portion 51 and a base hole 52 are provided above and below the base portion 20. As shown in FIG. 16, if the two claw portions 21 are fixed on the upper and lower sides with the fixing member 54, the number of the claw portions can be doubled. In addition, the claw portion 21 can be attached at an appropriate angle similarly to FIG. 12, and it is possible to easily cope with various tillage operations.

It is the schematic of a forward / reverse rotary tillage device. It is a disassembled perspective view of a forward / reverse rotary tiller. It is the front view and side view of a nail | claw member. It is the front view and side view of a rotation member. It is the operation | movement figure seen from the axial direction of the rotary shaft of the nail | claw member. It is the figure seen from the axial direction of the rotary axis | shaft of several claw members. It is a disassembled perspective view of a forward / reverse rotary tiller. It is the figure seen from the axial direction of the rotary axis | shaft of several claw members. It is a disassembled front view of a forward / reverse rotary rotary device. It is an exploded view of the claw member of an embodiment concerning the present invention. It is an assembly drawing of the nail | claw member of embodiment which concerns on this invention. It is an assembly drawing of the nail | claw member of embodiment which concerns on this invention. It is a front view of the base of the claw member of an embodiment concerning the present invention. It is a front view of the base of the claw member of an embodiment concerning the present invention. It is a front view of the base of the claw member of an embodiment concerning the present invention. It is an assembly drawing of the nail | claw member of embodiment which concerns on this invention.

Explanation of symbols

1 Airframe 2 Gearbox 3 Horizontal frame 4 Transmission shaft frame 5 Support frame 7 Chain frame
10 Gear mechanism
11 Transmission shaft
12 Sprocket
13 chain
14 Sprocket
15 Rotary shaft
16 Claw material
17 cylinder
18 Cover
20 base
21 Nail
22 Slotted hole
23 Mating hole
24 Rotating member
25 Flange
26 holes
27 Mounting hole
28 Rod-shaped member
29 Support shaft
30 plug
31 Mating hole
32 Positioning hole
33 Support disk
34 hole
35 Through hole
36 Blange
37 Actuating member
38 long hole
39 Mating hole
40 Screw holes
41 Rotating member
42 holes
43 Mounting hole
44 Rod member
45 Cover material
46 hole
47 Through hole
48 Support rod
50 Abutment
51 Notch
52 Base hole
53 Mounting hole
54 Fixing member

Claims (1)

  A claw member for a rotary tiller comprising: a base portion mounted on a shaft; a claw portion that is separate from the base portion; and a fixing member that fixes the claw portion to the base portion. It has two base holes that are drilled through at intervals, and a contact portion is formed between the two base holes, and the claw portion is drilled through at a predetermined interval And a notch is formed between the two mounting holes, and the fixing member is inserted into the base hole and the mounting hole to fix the claw portion to the base. The claw member is attached to the base portion so as to straddle the contact portion at the notch portion, and can be fixed by the fixing member.

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