JP4167134B2 - Cover device for rotary tiller - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cover device for a rotary tiller.
[0002]
[Prior art]
In this type of prior art, a support arm protrudes from the gear case to the left and right sides, a transmission case and a side frame are attached to the outer ends of the left and right support arms to form a rotary machine frame, and the transmission case and the side frame are A pawl shaft is arranged between the lower portions to form a tillage portion, and a main cover that covers the top of the tillage portion and a rear cover that covers the rear of the tillage portion are provided between the transmission case and the side frame, and the transmission case and the side A side cover that covers the side of the tillage portion is provided on the rear side of the frame, and an elastic cover is provided on the surface of the tillage portion of the main cover and the rear cover.
(For example, refer to Patent Document 1).
[0003]
[Patent Document 1]
Patent Publication No. 2535423 [0004]
[Problems to be solved by the invention]
The conventional rotary rotary cultivator cover device is provided with rubber elastic covers on the inner surfaces of the main cover and the rear cover to prevent the mud from adhering and reduce the impact sound of the stone. Although effective, it cannot prevent the mud from adhering to the rotary machine frame such as the transmission case, side frame, etc., and stone collision, etc. It has not yet been ensured.
[0005]
The inner surface facing the tillage part of the rotary machine frame such as the transmission case and the side frame has a lot of irregularities formed on the surface of the tillage part side by the laminated part of the plate material, the bolt head, etc., and mud is easily attached.
An object of the present invention is to provide a cover device for a rotary tiller that can solve such problems of the prior art.
The present invention provides a rotary cultivator that can more reliably prevent mud adhesion, reduce sedimentary stone impact noise, etc. by providing an inner surface cover on the inner surface of the rotary machine frame, such as a transmission case and side frame, facing the tilling portion. An object of the present invention is to provide a cover device.
[0006]
[Means for Solving the Problems]
Specific means for solving the problems in the present invention are as follows.
First, the rotary machine frame 10 is provided with a cover device 21 that covers the outer peripheral side of the tilling unit 20 and the left and right sides of the tilling unit 20 at the rear of the rotary machine frame 10. It has a non-metallic inner surface cover 26 provided on the inner surface facing the tillage part 20 of the rotary machine frame 10 so as to cover the side.
As a result, it is possible to reliably prevent adhesion of mud, reduce earth and stone impact noise, and the like on the inner surface of the rotary machine frame 10 on the side of the tillage unit 20.
[0007]
Second, the support arm 12 protrudes from the gear case 11 to the left and right sides, and a transmission case 13 and a side frame 14 are attached to the outer ends of the left and right support arms 12 to constitute the rotary machine frame 10. The claw shaft 3 is arranged between the lower portions of the side frames 14 to form the tilling portion 20, the main cover 22 covering the upper portion of the tilling portion 20 between the transmission case 13 and the side frame 14, and the tilling portion 20 on the rear side. The side cover 23 which covers the side of the tilling part 20 is provided on the rear side of the transmission case 13 and the side frame 14, and the surface of the transmission case 13 and / or the side frame 14 on the side of the tilling part 20 is provided. Is provided with a non-metallic inner surface cover 26 that covers the side of the tillage unit 20.
[0008]
Thereby, it is possible to reliably prevent mud adhesion, reduce sedimentary stone impact noise, and the like on the surface of the transmission case 13 and / or the side frame 14 on the side of the tillage unit 20.
Thirdly, the inner surface cover 26 is formed so that the surface 26A on the side of the tilling portion 20 is substantially flat, and the opposite surface 26B is in close contact with the surface on the side of the tilling portion 20 of the transmission case 13 or the side frame 14. It is forming in the uneven surface which can be fitted in the unevenness | corrugation of this.
As a result, when mud, sandstone or the like collides with the inner cover 26, the inner cover 26 does not collide with the transmission case 13 or the side frame 14, the frictional resistance is reduced, and mud adhesion can be prevented. And the durability of the inner surface cover 26 can be increased.
[0009]
Fourth, the inner surface cover 26 is made of plastic or rubber.
As a result, it is possible to more reliably prevent mud deposits, reduce the impact sound of mud and stones, and eliminate high metal noise.
5thly, the said cover apparatus 21 is providing the elastic cover 30 in the surface which covers the outer periphery of the tilling part 20. FIG.
Thereby, as a whole rotary cultivator, prevention of mud adhesion, reduction of earth and stone impact noise and the like can be more reliably performed.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In FIGS. 1 and 2, reference numeral 1 denotes a side drive type rotary tiller. A support arm 12 protrudes from the gear case 11 to the left and right sides, and a transmission case 13 and a side frame 14 are attached to the outer ends of the left and right support arms 12. The rotary machine frame 10 is configured, a rotary shaft is provided below the transmission case 13 and the side frame 14 via a bearing portion 17, and the claw shaft 3 is connected between the rotary shafts.
[0011]
The power is transmitted from the PTO shaft of the tractor to the input shaft 18 of the gear case 11 and is transmitted to the chain transmission means in the transmission case 13 via the gear in the gear case 11 and the transmission shaft in the left support arm 12. The claw shaft 3 is driven via the rotation shaft on the side. The rotating shaft on the transmission case 13 side is the driving claw shaft, and the rotating shaft on the side frame 14 side is the idle shaft.
The claw shaft 3 formed of a cylindrical tube is provided with a number of claw brackets 16 spaced apart in the axial direction and the circumferential direction. The claw bracket 16 has a shape in which a small U-shaped member is fitted to a large U-shaped member.
[0012]
Two claw brackets 16 are provided at the left and right ends of the claw shaft 3 at positions that are substantially the same in the axial direction and separated in the circumferential direction, and one claw bracket 16 has a claw 2A similar to the other. On the other hand, the other claw bracket 16 is provided with a special claw 2B having a shape protruding in the off-axis direction of the claw shaft 3 in order to make the tilling width as wide as possible.
Each cultivating claw 2 has its base portion inserted into the concave portion 16A of the claw bracket 16, and a bolt 27 is inserted through them, and a nut is screwed and fastened. The rotation area of the tillage claw 2 is a tillage portion 20.
[0013]
A cover device 21 that covers the tillage portion 20 is provided inside the transmission case 13 and the side frame 14. In the cover device 21, a rear cover 24 that covers the tillage portion 20 from the rear is pivotally supported at the rear portion of the main cover 22 that covers the top of the tillage portion 20, and on the left and right sides of the rear cover 24, A side cover 23 is fixed to the rear portions of the transmission case 13 and the side frame 14, and an elastic cover 30 is stretched on the surface of the main cover 22 and the rear cover 24 covering the outer periphery of the tilling portion 20.
On the surface of the transmission case 13 and the side frame 14 on the side of the tilling unit 20 (inner surface of the rotary machine frame 10), a non-metallic inner surface cover 26 that covers the side of the tilling unit 20 is provided. The inner surface cover 26 has a thin plate shape and is preferably a plastic such as glass fiber reinforced plastic, but may be formed of rubber.
[0014]
In FIG. 3 showing the transmission case 13 side (the inner surface cover 26L is removed), the side wall 22a of the main cover 22 is brought into contact with the surface of the transmission case 13 on the tillage portion 20 side, and the bolt head to which it is attached. 22b is exposed, a mounting portion 23a of the side cover 23 projects rearward from the vicinity of the bearing portion 17, and a projection 17a projects radially outward from the bearing portion 17.
As shown in FIGS. 2 and 4-7, the inner surface cover 26L for the transmission case 13 has an inner surface 26A on the side of the tilling portion 20 formed substantially flat, on the outer surface 26B on the transmission case 13 side, which is the opposite surface. Includes a thin plate portion 26b one step down from the full thickness portion 26a, concave portions 26c and 26d at the front and rear end portions of the full thickness portion 26a, a hole 26e located at the front and rear portions of the thin plate portion 26b, a concave portion 26f located at the bottom edge, and the like. It is formed and has an uneven surface.
[0015]
When the inner surface cover 26L faces the outer surface 26B to the surface of the transmission case 13 facing the tilling portion 20 side, the full thickness portion 26a faces the transmission case 13, the thin plate portion 26b faces the side wall 22a of the main cover 22, and The recesses 26c and 26d at the end are fitted to the mounting portion 23a of the side cover 23, the hole 26e located at the front and rear portions is fitted to the bolt head 22b, and the recess 26f at the bottom edge is fitted to the projection 17a. The outer surface 26 </ b> B is in close contact with the surface on the side of the tillage unit 20 such as the transmission case 13.
The inner surface cover 26L has a plurality of fastener insertion holes 26g, and is attached to the side wall 22a, the attachment portion 23a, etc. via fasteners 28 such as bolts. The fastener 28 has a round thin head, does not protrude greatly from the inner surface 26A, and is designed so as not to make a significant step with the inner surface 26A.
[0016]
The inner cover 26L fits and fits closely to the uneven surface of the transmission case 13 on the tillage portion 20 side, so that even if it hits the earth and sand, almost the entire surface can be backed up on the transmission case 13 side, and a collision sound is generated. In addition, durability can be increased and the inner surface 26A is flat, whereby the frictional resistance is reduced, the amount of mud attached is reduced, and the ease of dropping the attached soil is improved.
In FIG. 8 showing the side frame 14 side (the inner surface cover 26R is removed), a reinforcing rib 14a is integrally formed on the surface of the side frame 14 on the tillage portion 20 side, and a side wall 22a of the main cover 22 is formed. The bolt head 22b that is abutted and exposed is exposed, and the vicinity of the bearing portion 17 is perforated to form the attachment portion 23a of the side cover 23, and the projection 17a protrudes radially outward from the bearing portion 17. ing. The rib 14a is formed by bending a plate material forming the side frame 14, protrudes outward, and has a groove on the side of the tillage portion 20.
[0017]
The inner surface cover 26R for the side frame 14 has substantially the same shape as the inner surface cover 26L as shown in FIGS. 9 to 12, and the inner surface 26A on the tillage portion 20 side is formed substantially flat, and is the opposite surface. The outer surface 26B on the side frame 14 side is formed with a thin plate portion 26b that is stepped down from the full thickness portion 26a, a hole 26e that is positioned in the front and rear portions of the thin plate portion 26b, a recess 26f that is positioned at the bottom edge, and the like. It has become. None of the front and rear end portions of the full thickness portion 26a correspond to the concave portions 26c and 26d.
When the outer surface 26B faces the surface of the side frame 14 facing the tilling portion 20 side of the inner surface cover 26R, the full thickness portion 26a faces the side frame 14, the thin plate portion 26b faces the side wall 22a of the main cover 22, and The hole 26e located in the portion fits the bolt head 22b and the recess 26f on the bottom edge fits substantially on the projection 17a, and the outer surface 26B of the inner surface cover 26R is in close contact with the surface on the side of the tillage portion 20 such as the side frame 14. become.
[0018]
A plurality of fastener insertion holes 26g are also formed in the inner surface cover 26R, and are attached to the side wall 22a, the side frame 14 and the like via fasteners 28 such as bolts. The fastener 28 has a round thin head, does not protrude greatly from the inner surface 26A, and is designed so as not to make a significant step with the inner surface 26A.
Since the inner surface cover 26R fits and comes into close contact with the concavo-convex surface of the side frame 14 on the side of the tilling portion 20, the same effect as the inner surface cover 26L can be achieved.
The left and right side covers 23 may be formed of a metal plate, but here they are formed of the same plastic as the inner cover 26 and may be fastened together with the left and right inner covers 26 via fasteners 28. it can.
[0019]
FIGS. 13 and 14 show the attachment structure of the elastic cover 30 stretched on the surface of the main cover 22 and the rear cover 24 on the side of the tilling unit 20, and the surface of the main cover 22 and the rear cover 24 on the side of the tilling unit 20 is shown. A plurality of brackets 33 are fixed at intervals in the vertical and horizontal directions, and a latching protrusion 34 is provided on the outer surface of the elastic cover 30 corresponding to each bracket 33.
The latching protrusion 34 is formed by integrally forming a disc-shaped head 34 b on the neck 34 a, and the head 34 b is hooked on the bracket 33 by inserting the neck 34 a into a groove 33 a formed on the bracket 33. It has become.
[0020]
The bracket 33 is disposed in the main cover 22 and the rear cover 24 so that the grooves 33a are laterally laterally or forwardly, and the elastic cover 30 is attached to the main cover 22 by engaging the latching protrusions 34 laterally or laterally. And the rear cover 24 is hooked and attached.
In the mounting structure of the elastic cover 30, unevenness due to mounting bolts, washers and the like is not formed on the surface of the elastic cover 30 on the side of the tillage unit 20, so that mud adheres less and durability can be improved. The latching protrusion 34 may be formed in a T-shaped cross section, or the head 34b may be formed in a quadrangle.
[0021]
FIG. 15 shows a first example of the mud accumulation prevention means of the flap cover. As shown in FIGS. 2 and 7, the lower end of the rear cover 24 is provided with a front end of a flap cover 36 detachably via a mounting tool 37 in order to level the tilling marks. Is provided with an extension flap cover 39 that can be folded at both ends.
The flap cover 36 is made of a sheet metal and is formed in an arc shape in the front-rear direction as viewed from the side, and mud is easily deposited on the upper surface 36a having a concave shape.
[0022]
The mud deposit prevention means 38 is a flexible foam, is formed in the shape of a flat upper surface and an arc lower surface, and is lightweight and easily deformable.
The foam is divided into three members, a central foam 38A and left and right foams 38B. The central foam 38A protrudes from the left and right engaging portions 38a, and the left and right foams 38B are engageable with the engaging portions 38a. An engaging recess 38b and a projection 38c are formed.
In the mud accumulation preventing means 38, the length of the left and right foams 38B engaged with the left and right of the central foam 38A is substantially equivalent to the full length of the flap cover 36 or the extended flap cover 39 in the extended posture, The protrusion 38 c enters the mounting portion 36 b for the mounting tool 37 provided on the flap cover 36.
[0023]
The mud deposit prevention means 38 inserts and arranges the central foam 38A into the upper surface 36a of the flap cover 36, and also inserts the protrusion 38c into the mounting portion 36b while inserting the left and right foams 38B into the upper surface 36a. 38b is fitted to the engaging portion 38a.
By this mud accumulation preventing means 38, the upper surface 36a of the flap cover 36 is filled and has no dent, that is, the upper edges of the front and rear ends of the flap cover 36 and the upper surfaces of the central foam 38A and the left and right foams 38B are substantially flat. It becomes one, and deposition can be reduced greatly even if it covers mud.
[0024]
The mud accumulation preventing means 38 shown in FIG. 15 is a three-part type, but it may be divided into two parts, four parts, or one.
FIG. 16 shows a second example of the mud accumulation preventing means of the flap cover, in which one or a plurality of divided foam bodies 38A are provided with an engaging convex portion 40 of the same material, and the engaging convex portion is formed at the front upper part of the flap cover 36. A box-shaped fitting body 41 into which 40 can be inserted from below is provided. The fitting body 41 is formed with an opening 41a on the back surface for pushing down and releasing the engaging protrusion 40 inside.
[0025]
In the mud deposit prevention means 38 of the second example, the foam 38A is inserted into the flap cover 36 by inserting the engaging protrusion 40 into the fitting body 41 while inserting the foam 38A into the upper surface 36a of the flap cover 36. It is attached and the upper surface 36a is closed as in the first example to prevent mud accumulation. By inserting a finger through the opening 41a of the fitting body 41 and pushing down the engaging projection 40, the foam body 38a can be deformed and detached from the flap cover 36.
In the present invention, the shape of each member and the positional relationship between the front, rear, left, and right in the 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.
[0026]
For example, the inner surface cover 26 is attached to only one of the transmission case 13 and the side frame 14, or the side cover 23 is formed of sheet metal, and the surface of the side cover 23 on the tillage unit 20 side is covered with the left and right inner surface covers. 26 may be covered.
Further, an outwardly projecting bolt is planted on the inner surface cover 26, and the bolt is passed through a bracket provided on the transmission case 13 and the side frame 14, and a nut is screwed from the left and right outer surface sides of the rotary tiller 1. The inner cover 26 may be attached by combining them.
[0027]
When the inner surface cover 26 is formed of rubber, a gap may be provided between the transmission case 13 and the side frame 14.
[0028]
【The invention's effect】
According to the present invention described in detail above, it is possible to reliably prevent adhesion of mud, reduce sedimentary stone impact noise, and the like on the surface of the transmission case 13 and / or the side frame 14 on the side of the tillage unit 20.
[Brief description of the drawings]
FIG. 1 is a rear view showing an embodiment of the present invention.
FIG. 2 is a side view of the same.
FIG. 3 is a view taken in the direction of arrow X in FIG. 1 before the inner cover is attached.
4 is a view taken in the direction of the arrow X in FIG. 1;
FIG. 5 is an external view of a left inner cover.
FIG. 6 is a bottom view of the left inner cover.
FIG. 7 is a left perspective view of a rotary cultivator.
8 is a view taken in the direction of arrow Y in FIG. 1 before the inner cover is attached.
9 is a view on arrow Y in FIG. 1;
FIG. 10 is an outer view of the right inner cover.
FIG. 11 is a bottom view of the right inner cover.
FIG. 12 is a right perspective view of a rotary cultivator.
FIG. 13 is a cross-sectional view showing a mounting structure of an elastic cover.
FIG. 14 is an exploded perspective view showing a mounting structure of an elastic cover.
FIG. 15 is an exploded perspective view showing a first example of the mud accumulation preventing means of the flap cover.
FIG. 16 is a perspective view showing a second example of the mud accumulation preventing means of the flap cover.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Rotary cultivator 2 Claw claw 3 Claw shaft 10 Rotary machine frame 11 Gear case 12 Support arm 13 Transmission case 14 Side frame 20 Cultivation part 21 Cover device 22 Main cover 22a Side wall 23 Side cover 24 Rear cover 26 Inner surface cover 26A Inner surface 26B Outer surface 28 Fastener 30 Elastic Cover

Claims (4)

The support arm (12) protrudes from the gear case (11) to the left and right sides, and the transmission case (13) and the side frame (14) are attached to the outer ends of the left and right support arms (12) to attach the rotary machine frame (10). Configured, a pawl shaft (3) is arranged between the transmission case (13) and the lower part of the side frame (14) to form a tilling part (20), and the transmission case (13) and the side frame (14) A main cover (22) covering the top of the tillage part (20) and a rear cover (24) covering the rear of the tillage part (20) are provided between the rear side of the transmission case (13) and the side frame (14). The side cover (23) that covers the side of the tillage part (20) is provided on the side of the tillage part (20) of the transmission case (13), and the side of the tillage part (20) is covered with plastic or rubber. The inner cover (26) is provided.
The inner surface cover (26) forms a substantially flat surface (26A) on the side of the tillage portion (20), and the opposite surface (26B) is in close contact with the surface on the side of the tillage portion (20) of the transmission case (13). It is formed on an uneven surface that can fit into the uneven surface,
The side wall (22a) of the main cover (22) is in contact with the surface of the transmission case (13) on the side of the tillage section (20), and the bolt head (22b) to which the side wall (22b) is attached is exposed. The inner cover (26) on the (13) side has a full thickness part (26a) that contacts the transmission case (13) and a thin plate part (26b) that contacts the side wall (22a) of the main cover (22). A cover device for a rotary tiller, characterized in that a hole (26e) that fits into the bolt head (22b) is formed in the thin plate portion (26b) . The transmission case (13) projects a mounting portion (23a) of the side cover (23) rearward from the vicinity of the bearing portion (17) of the claw shaft (3) and extends radially outward from the bearing portion (17). Protruding protrusion (17a),
The inner surface cover (26) forms a recess (26c) that fits into the mounting portion (23a) of the side cover (23) and a recess (26f) that fits into the protrusion (17a) of the bearing portion (17). The rotary tiller cover device according to claim 1, wherein the cover device is a rotary tiller. The support arm (12) protrudes from the gear case (11) to the left and right sides, and the transmission case (13) and the side frame (14) are attached to the outer ends of the left and right support arms (12) to attach the rotary machine frame (10). Configured, a pawl shaft (3) is arranged between the transmission case (13) and the lower part of the side frame (14) to form a tilling part (20), and the transmission case (13) and the side frame (14) A main cover (22) covering the top of the tillage part (20) and a rear cover (24) covering the rear of the tillage part (20) are provided between the rear side of the transmission case (13) and the side frame (14). The side cover (23) that covers the side of the tillage part (20) is provided on the side, and the side frame (14) is made of plastic or rubber that covers the side of the tillage part (20) on the surface of the side frame (14). Provide an inner cover (26) Ri,
The inner surface cover (26) forms a substantially flat surface (26A) on the side of the tilling portion (20), and the opposite surface (26B) is in close contact with the surface on the side of the tilling portion (20) of the side frame (14) facing it. It is formed on an uneven surface that can fit into the uneven surface,
A side wall (22a) of the main cover (22) is in contact with the surface of the side frame (14) on the side of the tillage part (20), and a bolt head (22b) to which the side wall (22a) is attached is exposed. The inner cover (26) on the (14) side has a full thickness part (26a) that contacts the side frame (14) and a thin plate part (26b) that contacts the side wall (22a) of the main cover (22). A cover device for a rotary tiller , characterized in that a hole (26e) that fits into the bolt head (22b) is formed in the thin plate portion (26b) . The side frame (14) is provided with a mounting portion (23a) of the side cover (23) on the bearing portion (17) of the claw shaft (3), and protrudes radially outward from the bearing portion (17) (17a). Protruding
The inner surface cover (26) forms a recess (26c) that fits into the mounting portion (23a) of the side cover (23) and a recess (26f) that fits into the protrusion (17a) of the bearing portion (17). The rotary tiller cover device according to claim 3, wherein the cover device is a rotary tiller.

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