JP2008125363A - Ground-leveling cover - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To perform optimal ground leveling with a small number of parts and less work for the parts. <P>SOLUTION: A ground-leveling cover 1 is equipped with a cover body 30, installed on the lower end side of a rear cover 15 covering the rear of a tilling part 11 and having a ground-leveling surface a and a mounting member 31 for making the cover body 30 engage with an engaging member 24 on the lower back surface of the rear cover 15 so as to be freely disengageable. Both the right and left sides of the cover body 30 are closed to form a cavity body 30A having a flat space K long in the front and the rear, when viewed from the side, and the ground-leveling surface a is formed on the undersurface of the cavity body 30A to join the mounting member 31 to the top surface b. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a leveling cover provided in a rotary cover of a rotary tiller.

The rotary cover that covers the tillage part of the rotary tiller includes an upper cover that covers the upper part and a rear cover that covers the rear part, and a leveling cover is detachably attached to the rear lower end of the rear cover. This leveling cover has a curved sheet metal, the rear lower part is rounded upward, and a groove-like part is formed on the upper surface side, so that mud is deposited in the groove-like part and the leveling is performed properly. Can be difficult.
Therefore, in the prior art shown in Patent Document 1, a soil intrusion prevention member for filling the groove-like portion is provided on the upper surface side of the leveling cover, or the leveling cover itself is formed of a resin hollow product.
JP 2006-75169 A

In the conventional technique for providing the soil intrusion prevention member, the number of parts and the processing of the parts are large, and the weight and the cost are high. In the conventional technique formed by a resin hollow product, mud enters the hollow interior. In addition, both of the conventional techniques have a structure in which the mounting member and the bolt for fixing to the rear cover are fixed to each other, which causes a problem that the number of parts is large and mud accumulates in the fixing bolt.
An object of the present invention is to provide a leveling cover capable of solving such problems.

  In the present invention, the cover body is formed of a flat hollow body closed on both the left and right sides, a ground surface is formed on the lower surface thereof, and a mounting member is joined to the upper surface, thereby reducing the number of components and processing of the components. An object of the present invention is to provide a leveling cover capable of smooth leveling.

Specific means for solving the problems in the present invention are as follows.
First, a cover body 30 provided on the lower end side of the rear cover 15 covering the rear of the tilling unit 11 and having a leveling surface a, and the cover body 30 are engaged with and disengaged from a locking member 24 on the lower back surface of the rear cover 15. In the leveling cover having the mounting member 31 to be freely locked,
The cover body 30 is formed of a hollow body 30A having a flat space K that is closed on both the left and right sides and long in the side view, and a ground surface a is formed on the lower surface of the hollow body 30A. The mounting member 31 is joined.

Second, the rear end surface c of the cover body 30 protrudes rearward from the rear end of the mounting member 31.
Third, a hollow body 30A in which the cover body 30 is formed by deforming a metal pipe into a flat shape is welded with side plates 30B on both left and right ends and a front guide plate 30C covering the rear end of the rear cover 15 to form the cavity. A metal mounting member 31 is welded to the upper surface b of the body 30A.
Fourth, the hollow body 30A in which the cover body 30 is made of a resin and has a flat space K is bonded to the left and right side plates 30B and the front guide plate 30C covering the rear ends of the rear cover 15, respectively. A resin mounting member 31 is bonded to the upper surface b of the hollow body 30A.

Fifthly, an extended leveling body 32 is connected to the left and right ends of the cover body 30, and the extended leveling body 32 is formed of the same material as the cavity 30A and has a left and right side with respect to a cavity formed in substantially the same shape in side view. The side plates at both ends are joined.
Next, the operation of the leveling cover having the above configuration will be described.
The cover body 30 on which the ground leveling surface a is formed on the lower surface is formed of a hollow body 30A that is closed on both the left and right sides and has a flat space K that is long in front and rear in a side view. Can be formed at a low cost, and the mounting member 31 is joined to the upper surface b thereof, so that the mounting member 31 for detachably locking to the locking member 24 on the lower rear surface of the rear cover 15 can be easily and easily attached. It can be provided inexpensively.

If the rear end surface c of the cover body 30 protrudes rearward from the rear end of the mounting member 31, the rear end of the mounting member 31 is lowered when the rotary tiller is lowered close to the farm scene and moved backward to the edge of the edge. The part can be prevented from sticking in the farm scene.
When the cover main body 30 is made of metal, it can be formed simply by welding the left and right side plates 30B and the mounting members 31 on the upper surface b to a hollow body 30A in which a metal pipe is deformed, and can be formed at a light weight and at low cost. .
When the cover body 30 is formed of resin, it can be formed by simply bonding the resin left and right side plates 30B and the front guide plate 30C to the hollow body 30A in which the flat space K is formed of resin. It can be formed at low cost.

  When the extended leveling body 32 is connected to the left and right ends of the cover main body 30, the extended leveling body 32 can be configured by joining side plates on both the left and right sides to the hollow body, similarly to the cavity body 30A. Lightweight and inexpensive.

  According to the present invention, the cover body itself can be formed in a lightweight and inexpensive manner, and mud does not enter inside, and the mounting member 31 can be provided easily and inexpensively.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In FIG. 4, the rotary cultivator 1 is mounted on the rear part of the tractor so as to be movable up and down via a three-point link mechanism or the like. The upper part of the transmission case 4 is fixed to the end side, and the upper part of the side frame is fixed to the outer end side of the right support arm 3 to constitute a portal machine frame 5.
A bifurcated top mast 6 is fixed to the gear case 2 of the machine frame 5 in the front and rear direction so as to project upward. The top portion 6a of the top mast 6 has an upper end of the top link of the three-point link mechanism or An upper attachment portion 7 is provided that is attached to an upper portion of a connecting frame connected to the rear end side of the three-point link mechanism.

Each of the left and right support arms 3 is provided with a mounting bracket 8 that is attached to the lower end of a connecting frame connected to the rear end side of the lower link of the three-point link mechanism or the rear end side of the three-point link mechanism.
A claw shaft 9 is rotatably supported at the lower part of the machine frame 5 between the lower part of the transmission case 4 and the side frame, and a cultivating portion 11 is formed by a plurality of cultivating claws 10 attached to the claw shaft 9. ing.
The rotary cultivator 1 is provided with a rotary cover 13 that covers the cultivating part 11. The rotary cover 13 includes an upper cover 14 that covers the upper part of the cultivating part 11, a rear cover 15 that covers the rear of the cultivating part 11, and A side cover 16 is provided to cover the left and right sides of the rear portion of the tillage unit 11.

The upper cover 14 has its left and right ends attached and fixed to side plates 25 fixed to the transmission case 4 and the side frame, respectively, and the side cover 16 is also attached to the transmission case 4 or the side frame.
The rear cover 15 is pivotally supported on the rear end side (machine frame 5 side) of the upper cover 14 so as to be rotatable about the axis of a support shaft 17 having a horizontal axis. A leveling cover 19 is detachably attached to the rear lower part.
A support frame 21 to which the left and right gauge wheels 20 are attached is supported on the machine frame 5 so as to be swingable up and down. Between the support frame 21 and the upper portion of the rear portion 6b of the top mast 6, the support frame 21 is supported. A height adjusting mechanism 22 that is extendable and retractable to adjust the vertical swing position is provided.

In the rotary cultivator 1, a pair of left and right abutting means 23 are provided across the machine frame 5 and the rear cover 15, and the lowering side of the rear cover 15 is set to the lower side (the grounding direction). ).
1 to 4, a leveling portion 15 a that contacts the field when the leveling cover 19 is removed is formed on the lower end side of the rear cover 15, and a rear lower portion of the rear cover 15 is provided on a rear surface of the rear cover 15. A pair of left and right reinforcing members 26 are provided from the upper part to the lower part, and a locking member 24 is provided on each reinforcing member 26.

Each of the left and right locking members 24 is formed by bending the center of the plate material and pressing it into a U shape, and has left and right side walls and a bottom wall. A pair of front and rear engaging portions 27 are provided, and a pair of front and rear positioning portions 28 formed of a round bar are provided at the lower portion.
The leveling cover 19 includes a cover main body 30 having a leveling surface a, and a mounting member 31 that detachably locks the cover main body 30 to the locking member 24 on the lower rear surface of the rear cover 15.
The cover body 30 is formed of a hollow body 30A having a flat space K that is closed in the left and right sides and long in the front-rear direction, and an arc-shaped ground surface a having a large curvature is formed on the lower surface of the hollow body 30A. A substantially flat upper surface b is formed on the upper side.

The mounting member 31 is joined to the upper surface b of the hollow body 30A, and a rear end surface c projects rearward from the rear end of the mounting member 31. The rear end surface c protrudes from the rear end of the mounting member 31 by a dimension T, and conversely, the rear end of the mounting member 31 may be positioned forward from the rear end surface c by a dimension T or more.
The cover body 30 can be formed of metal or resin (synthetic resin), and when formed of metal, a circular pipe such as a metal pipe is deformed so as to be elongated in the front-rear direction by pressing or basil processing. The hollow body 30A is formed by flattening, and the side plates 30B are welded (joined) to the left and right ends of the hollow body 30A to seal the space K, and the rear end of the rear cover 15 is formed at the upper front end of the hollow body 30A. The front guide plate 30C to be covered is welded.

The mounting member 31 is a metal plate formed by punching a pair of openings 37, and is bent between the pair of openings 37 and pressed into a U-shape, and has left and right side walls and an upper wall. The lower edges of the left and right side walls are welded to the upper surface b of the hollow body 30 </ b> A and are inserted into the U-shaped locking member 24. Since the upper portion of the mounting member 31 forms an opening 37, it serves as a grip portion 38 for carrying the leveling cover 19.
Since the mounting member 31 is directly joined to the upper surface b of the cover main body 30 and is not bolt-fastened, it is not necessary to make a fastening structure for the cover main body 30 and the mounting member 31, and the number of parts constituting both is small. There are no obstacles that accumulate mud on the upper surface b of the cover body 30, and even if mud is placed, the cover body 30 can be removed by tilting.

When the cover body 30 is formed of resin, a hollow body 30A in which a substantially flat space K is formed of resin is formed, and the resin side plates 30B are bonded to both left and right ends of the hollow body 30A with an adhesive or the like. Then, the space K is hermetically sealed, and the resin mounting member 31 is bonded to the upper surface b of the hollow body 30A. Also in the case of resin, the hollow body 30A has an arc-shaped ground level a on the lower surface and a flat upper surface b on the upper side.
In FIG. 3, extended leveling bodies 32 are detachably connected to the left and right ends of the cover body 30. The extended leveling body 32 can be freely changed in posture from the extended posture (state shown in FIG. 3) protruding outward in the left-right direction from the cover main body 30 to a non-use posture positioned on the upper side of the cover main body 30. And it is urged | biased in the direction rotated to an extended attitude | position.

Further, the extended leveling body 32 is changed into an extended posture and a non-use posture by a swinging operation of an operation lever 34 supported so as to be swingable by a support bracket 33 attached to the rear portion 6b of the top mast 6. The operation lever 34 can be grasped from the driver seat side of the tractor by raising the rotary tiller 1, whereby the extended leveling body 32 is moved to the driver seat side of the tractor. Remote control is possible.
The extended leveling body 32 is made of the same material as the hollow body 30A and has a substantially identical shape in side view with side plates on both left and right sides joined thereto, and is formed of metal or resin in the same manner as the cover body 30. ing.

The mounting member 31 of the leveling cover 19 has a mounting portion 35 formed in the front portion, and a locking member 36 is provided in the mounting portion 35.
The mounting portion 35 is formed to have a lateral width that can be inserted into the locking member 24 of the rear cover 15, and a round portion that is detachably engaged with the engaging portion 27 of the locking member 24 from the upper side on the front side upper portion. A bar-made engaged portion 39 is provided, and a hook-shaped positioned portion 40 that engages with the positioning portion 28 of the locking member 24 from the rear side is formed at the lower portion on the front side of the mounting portion 35. A notch 42 is formed on the rear side of the positioning portion 40.

The lock member 36 includes a pivotal portion 44 that is rotatably supported around a shaft center in the left-right direction via a pivotal shaft 43 that passes through the upper side of the mounting portion 35, and a connecting portion 45 is connected to the pivotal portion 44. And a hook-like lock portion 47 that extends forward from the pivot portion 44 and clamps (grabs) the positioning portion 28 with the positioned portion 40.
The lock member 36 is urged in a locking direction (counterclockwise in FIG. 2) by a coil spring 48, and is rotated around the support shaft 43 by this urging force. When the positioning portion 28 can be held at the locked position and is rotated against the coil spring 48, the locking portion 47 is moved to the unlocked position where it is separated from the positioning portion 28, that is, the unlocked position.

In FIG. 1, the mounting member 31 of the leveling cover 19 is engaged with the front engaging portion 27 and the positioning portion 28 of the locking member 24, and the notch 42 avoids interference with the rear positioning portion 28. In FIG. 2, the mounting member 31 of the leveling cover 19 is engaged with the engaging portion 27 and the positioning portion 28 on the rear side of the locking member 24.
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.

For example, instead of providing the lock member 36, the leveling cover 19 may be mounted on the rear cover 15 by positioning the leveling cover 19 and then penetrating the pin across the locking member 24 and the mounting portion 35.
Moreover, although the lower edge shape of the side plates 30B at the left and right ends protrudes downward from the leveling surface a of the hollow body 30A, it is preferable to form it so as to be substantially flush with the leveling surface a.
FIG. 5 shows an example in which the leveling cover is a belt type. This leveling cover device 50 has a pair of left and right support plates 52 arranged between a pair of left and right side plates, and connects them with a plurality of connecting rods 51. Three rollers 53 (53A, 53B, 53C) in the front-rear direction are provided between the side plate and the support plate 52 and between the left and right support plates 52, respectively, via a horizontal shaft 54, and rubber is provided on the three front and rear rollers 53. An annular belt 55 made of steel is wound around. A mounting member 31 is fixed or integrally formed on the support plate 52.

The rollers 53A, 53B, and 53C are formed such that the intermediate roller 53B has a larger diameter than the front and rear rollers 53A and 53C, and the annular belt 55 forms a downwardly convex leveling surface a on the lower surface side of the front and rear.
In FIG. 5, the pair of left and right side plates and support plate 52 has a lower edge projecting downward from the leveling surface a of the annular belt 55. Preferably, it is formed so as to be substantially flush over 50 full widths in the left-right direction.
The leveling cover device 50 is pulled and moved by the rear cover 15 during the rotary tilling work. However, since the annular belt 55 is grounded to the field and is rotated by the roller 53, the relative speed difference (dragging) with the field is small. The occurrence of streaks, burrs, etc. in the leveling trace can be reduced, and the rollers 53A, 53B, 53C have different diameters, so the annular belt 55 has a different curvature of the leveling surface a at the position in the front-rear direction, and mud, rice straw, etc. Even if it adheres, it can be removed, and the occurrence of streaks, burrows, and the like can be further reduced.

A motor that rotationally drives any of the rollers 53A, 53B, and 53C may be provided on the side plate of the leveling cover device 50, and the annular belt 55 may be driven in conjunction with the vehicle speed sensor of the tractor. The forward speed of the rotary cultivator 1 and the movement of the annular belt 55 can be synchronized to eliminate the relative speed difference (drag), and the occurrence of leveling traces, stripping, and the like can be more reliably reduced.
FIG. 6 shows an example in which the belt type leveling cover device 50 shown in FIG. Since the leveling cover device 50 has a pair of left and right side plates 56 fixed to the rear cover 15, the support plate 52 and the mounting member 31 are not necessary.

  Other configurations and functions of the belt type leveling cover device 50 are the same as those shown in FIG.

It is a section side view showing an embodiment of the invention. It is an expanded sectional side view of the principal part. It is a rear view. It is a side view of the whole rotary tiller. It is a section side view showing an example of a belt type leveling cover device. It is a sectional side view showing the example which provided the belt type leveling cover device in the rear cover.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Tillage part 15 Rear cover 19 Leveling cover 24 Locking member 30 Cover main body 30A Hollow body 30B Side plate 30C Front guide body 31 Mounting member 32 Extension leveling body a Leveling surface b Upper surface c Rear end surface K Space

Claims (5)

A cover main body (30) provided on the lower end side of the rear cover (15) covering the rear of the tillage part (11) and having a leveling surface (a), and the cover main body (30) as a lower rear surface of the rear cover (15) A leveling cover including a mounting member (31) that is detachably locked to the locking member (24) of
The cover body (30) is formed by a hollow body (30A) having a flat space (K) that is closed in the left and right sides and long in the front and rear directions in a side view. A leveling cover, wherein a) is formed and the mounting member (31) is joined to the upper surface (b).   The leveling cover according to claim 1, wherein a rear end surface (c) of the cover body (30) protrudes rearward from a rear end of the mounting member (31).   A front guide plate (30C) covering the left and right side plates (30B) and the rear end of the rear cover (15) on a hollow body (30A) in which the cover main body (30) is formed by deforming a metal pipe into a flat shape. The leveling cover according to claim 1 or 2, wherein a metal mounting member (31) is welded to the upper surface (b) of the hollow body (30A).   A front guide that covers the hollow body (30A) in which the cover body (30) forms a flat space (K) with a resin, covering the side plates (30B) on both left and right sides of the resin and the rear end of the rear cover (15). The leveling cover according to claim 1 or 2, wherein a plate (30C) is bonded and a resin mounting member (31) is bonded to the upper surface (b) of the hollow body (30A).   An extended leveling body (32) is connected to the left and right ends of the cover body (30), and the extended leveling body (32) is made of the same material as the hollow body (30A) and has substantially the same shape in side view. The leveling cover according to claim 3 or 4, wherein side plates on both left and right sides are joined to the hollow body.

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