JPH052008Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a rotary tiller, and more particularly to a cover device for covering the upper part of a rotary work body.

[Conventional technology]

Conventionally, as a cover device for covering the upper part of the rotary work body in a rotary tillage device, for example, as described in Japanese Patent Application Laid-open No. 58-71801, a chain case and a chain case installed oppositely at the lower left and right sides of the main body frame have been used. A rubber elastic cover body covering the upper part of the rotary work body is disposed between the rotary work body and the bracket, and the front end of this elastic cover body is connected and fixed to the lower frame provided between the chain case and the bracket. A known structure is known in which the rear end of this elastic cover body is connected to a horizontal rod provided between the chain case and the bracket via a spring.

In addition, as described in Japanese Patent Application Laid-open No. 54-60107, a metal cover body covering the upper part of the rotary work body is installed between the chain case and the bracket, which are installed opposite to each other at the lower left and right sides of the main body frame. A structure is known in which the front end left and right parts and the rear end left and right parts of the metal cover body are supported by coil springs so as to be movable up and down.

[Problem that the invention attempts to solve]

In the structure described in JP-A No. 58-71801, the front end of the elastic cover body is connected and fixed to the lower frame, and the rear end is only connected to the horizontal rod via a spring. Since there is no structure to support the left and right ends of the cover body, if a clod of earth is strongly thrown by the rotary work unit against both the left and right ends of the elastic cover body, the clod will damage both the left and right ends of the elastic cover body. There is a problem in that the elastic cover body is elastically deformed so as to be rolled up, and clods of earth are scattered outward from between the left and right ends of the rolled-up elastic cover body and the chain case and bracket.
Further, there is a problem that the elastic cover body tends to swing insufficiently, and soil may adhere to the elastic cover body.

In addition, in the structure described in JP-A No. 54-60107, the metal cover body is supported by coil springs at the left and right parts of the front end and the left and right parts of the rear end, but this cover body is made of metal. Due to its nature, there is no elastic deformation of itself, and there is a problem that soil tends to adhere to and accumulate on its inner surface, and the fluidity of the soil is insufficient.

Therefore, instead of the support structure for the front and rear ends of the elastic cover body described in JP-A-58-71801, a support structure for a metal cover body described in JP-A-54-60107 was used. However, in this case, even if it is possible to prevent soil from adhering and accumulating on the elastic cover body and increase the fluidity of the soil, it is possible to Since there is no supporting structure, if a clod of soil is strongly thrown by the rotary work unit against both the left and right ends of this elastic cover body, the left and right ends of the elastic cover body will be rolled up by the clods. The problem that clods of earth are scattered outward from between the chain case and the bracket and the left and right ends of the elastic cover body which is elastically deformed and rolled up still cannot be solved.

Therefore, the present invention was developed in view of the above points, and it is possible to reliably press both the left and right ends of the elastic cover body from above, and to apply soil clods to the left and right ends of the elastic cover body using a rotary work unit. Even if it is thrown strongly, this clod prevents the left and right ends of the elastic cover body from being elastically deformed so as to roll upwards, and prevents the left and right ends of the elastic cover body from moving between the chain case and the bracket. It is possible to reliably prevent soil clods from scattering outward, and by sufficiently swinging the elastic cover body in the front-rear and up-down directions, soil can be prevented from adhering, and the soil clods can be guided backwards. The purpose of the present invention is to provide a rotary tillage device that can improve the fluidity of soil clods.

[Means for solving problems]

The rotary tilling device of the present invention includes a main body frame which is equipped with a transmission having an input shaft and has a chain case and a bracket arranged oppositely at the lower left and right sides, and a rotary tiller which is located between the chain case and the bracket on this main body frame and is rotatable. a rotary work body provided in the main body frame and rotatably driven by the output from the transmission; and a swingable rotary work body provided in the main body frame between the chain case and the bracket and covering the upper part of the rotary work body. The elastic cover body is provided with an elastic cover body, and a pressing plate disposed on the inner upper part of the chain case and bracket of the main body frame and presses both left and right end portions of the elastic cover body from above.

The front end of the elastic cover body is fixed to a pipe body suspended horizontally between the left and right arms rotatably connected to the left and right chain cases and brackets of the main body frame, and this pipe body is supported. It is supported by a coil spring provided through a rod, and the rear end of the elastic cover body is attached to a rotating piece rotatably provided on the main body frame, and this rotating piece is attached to the main body frame. It is supported by a coil spring stretched between the

[Effect]

In the rotary tillage device of the present invention, when the rotary work body is driven to rotate, the soil in the field is sequentially tilled and crushed by the rotary work body, and these soil clods are thrown toward the elastic cover body, It is guided by this elastic cover body and ejected rearward. In this case, the elastic cover body is swung back and forth and up and down by the earth clod, and its own elastic deformation prevents soil from adhering to the elastic cover body, causing the rotary work body to land on the ground. The clod is smoothly thrown backwards without any resistance.

In addition, the left and right ends of the elastic cover body are securely pressed down from above by the left and right holding plates, so that even if clods are strongly thrown against the left and right ends of the elastic cover body by the rotary work unit, The left and right ends of the elastic cover body will not be elastically deformed upward by this clod, and the clod will be scattered outward from between the left and right ends of the elastic cover body, the chain case, and the bracket. is prevented.

〔Example〕

Hereinafter, one embodiment of the present invention will be described with reference to the accompanying drawings.

In the figure, 1 is a main body frame, and this main frame 1 has a main frame that is long in the left and right direction, and a transmission 3 is provided in the middle part of this main frame so as to be rotatably protruded with an input shaft 2 facing forward. At the same time, the upper ends of left and right brackets 4, which are arranged opposite to each other, are fixed to both ends of the main frame, and a chain case 5 is fixed to the outer side of the bracket 4 on one side. Further, both ends of the tilling shaft 7 of the rotary work body 6 are rotatably mounted between the opposing chain case 5 and the lower end of the bracket 4 on one side and the lower end of the bracket 4 on the other side. There is.

Further, the protrusion of the tilling shaft 7 protruding into the chain case 5 and the protrusion of the output shaft 8 of the transmission 3 protruding into the upper end of the chain case 5 are connected via an interlocking medium 9 including a chain. are linked together. Further, a reinforcing pipe 10 is fixed between the front upper portions of the opposing brackets 4. The rotary work body 6 is rotationally driven by the output from the output shaft 8 of the transmission 3.

Next, a rotation center shaft 11 is protruded inwardly from the lower front end of the opposing bracket 4, and one end of the arm 12 is rotatably attached to the left and right rotation center shaft 11. A pipe body 13 is horizontally suspended between the other ends of the left and right arms 12. Further, between the opposing brackets 4, there is provided an elastic cover body 14 made of an elastic member such as a rubber plate, which covers the upper part of the rotary work body 6.
A front end portion of the elastic cover body 14 is integrally fixed to the pipe body 13 via a locking member 15. Further, a support frame 16 having a U-shaped cross section is integrally fixed to the rear end of the elastic cover body 14, and a horizontal shaft 1 is attached to both ends of the support frame 16 in the left and right direction.
One end of a rotary piece 18 is rotatably attached via 7, and the other end of this left and right rotary piece 18 is a support shaft protruding from the upper inner side of the left and right side plates 19 serving as the main body frame. The left and right side plates 19 are integrally connected to the rear ends of the opposing brackets 4. Further, coil springs 22 are stretched between the left and right horizontal shafts 17 of the support frame 16 and the protrusions 21 on the rear side of the left and right side plates 19, and the left and right coil springs 22 provide an elastic cover. The rear end of the body 14 is supported so as to be movable forward and backward.

Further, mounting pieces 23 are protruded from both sides of the pipe body 13, and the lower ends of the support rods 24 are rotatably pivoted to the left and right mounting pieces 23 by shafts 25, and the left and right support The upper part of the rod 24 is slidably inserted in the vertical direction into the left and right guides 26 which are pivotally connected to the main frame of the main body frame 1, respectively, and the upper part of the left and right guide 26 and the left and right support rods Coil springs 29 are wound between the upper ends of the 24 and the stoppers 27 and between the lower portions of the left and right guides 26 and the lower stoppers 28 of the left and right support rods 24. Left and right support rods 24 are supported so as to be vertically movable.

Therefore, the front and rear ends of the elastic cover body 14 are swingable by the coil springs 29 via the left and right support rods 24 provided at the front and rear, and the left and right coil springs 22 via the support frame 16. is supported by

Next, at the inner upper part of the opposing bracket 4, a gap is closed between the left and right ends of the elastic cover body 14, that is, both ends in the width direction, and the bracket 4 is closed, and both ends in the width direction are provided. A resin plate 30 made of synthetic resin that guides the swinging of the unit in the vertical and longitudinal directions is fixedly attached thereto.
Further, a support shaft 31 is horizontally projected from the upper front side of the opposing bracket 4, and these left and right support shafts 3
A presser plate 32 is attached to the elastic cover body 14 so as to be rotatable in the vertical direction by a protruding piece 33 protruding from the outer side of the front end thereof, and the left and right presser plates 32 are attached to both edges of the elastic cover body 14 in the width direction. It is abutted on both end edges so as to press it down from above.

Further, mounting shafts 34 are projected horizontally from the upper rear sides of the opposing brackets 4, and springs 35 are wound around the left and right mounting shafts 34, respectively, and one of the springs 35 is locked. Part 3
6 is locked to the bracket 4, and the other presser portion 37 is engaged with the rear end of the presser plate 32. The rear upper portions of the left and right presser plates 32 are supported from above by the other presser portion 37 of the spring 35. Furthermore, a cover body presser rod 38 is disposed horizontally at the upper part near the rear end of the elastic cover body 4, and this cover body presser rod 3
Both ends of the bracket 8 are fixed to the rear upper part of the opposing bracket 4.

Next, a tilling section cover 39 is disposed extending from the lower rear end of the elastic cover body 14 to the rear section and covering the rear upper part of the rotary work body 6, and both ends of the tilling section cover 39 are connected to the opposing bracket 4. It is fixed in one piece. This tilling section cover 39 has the elastic cover body 14 at its front end.
An engaging piece 40 that engages with the lower surface of the rear end is bent upward, and a bent piece 41 that is bent upward is formed on the rear end, and the entire rear end is bent downward. It is formed in a slightly curved shape. Further, a mounting piece 43 of a screen 42 is removably attached to the front lower part of the tilling section cover 39, and the screen 42 has a plurality of hanging pieces arranged in parallel at predetermined intervals in the length direction of the mounting piece 43. It is formed with a sieve rod 44 of.

Furthermore, leveling plates 46 are connected to lower portions on both sides of the tilling section cover 39 via hinges 45 so as to be rotatable in the vertical direction. The hinge 45 is attached to the tilling section cover 3.
A mounting plate 45a is fixed to the mounting plate 45a, a rotating piece 45c is pivotally connected to the mounting plate 45a via a horizontal shaft 45b so as to be vertically movable, and a rotating piece 45c is pivotally connected to the rotating piece 45c so as to be vertically movable via a horizontal axis 45d. It is composed of a mounting plate 45e fixed to the leveling plate 46.

In addition, hanging supports 4 are installed at the bottom of both sides of the flat plate 46.
A support arm 49 has a lower end portion rotatably attached to the support arm 49 via a shaft 48, and the midway of the suspension support rods 47 on both sides of the support arm 49 projects horizontally rearward from the leveling plate 46.
is pivotally mounted via a shaft 50. In addition, a retractable rod 5 is provided at the upper end of the suspension rod 47 on both sides.
1, one end of which is rotatably attached via a shaft 52, and the other portions of the advancing and retracting rods 51 on both sides of the guide body 5 are rotatably attached to both sides of the main body frame 1.
3, and between the opening edge of one end of the guide body 53 and the stopper 54 at the other end of the retractable rod 51, and between the opening edge of the other end of the guide body 53 and the stopper 54 of the retractable rod 51. Stopper 55 set in the middle
A coil spring 56 is wound around the retractable rod 51 on both sides between the two.

The front and rear coil springs 56 support the advancing and retracting rods 51 on both sides so that they can move back and forth in the front and rear directions, and the force of the front and rear coil springs 56 sets the leveling pressure of the leveling plate 46. has been done. In the figure, reference numeral 57 denotes a connecting frame protruding forward from both sides of the main body frame 1, and 58 denotes a ground ring attached to lower arms on both sides of the connecting frame 57 so as to be adjustable in height.

Next, the operation of the above structure will be explained.

The three-point connecting portions 57a and 57b of the connecting frame 57 of the machine are connected to the three-point suspension mechanism of the tractor, and the input shaft 2 of the machine is connected to the power take-off shaft of the tractor via a power transmission shaft. Further, the height of the grounding ring 58 is adjusted according to the working conditions in the field and set at an appropriate position.

Next, when the machine is towed by a tractor and the input shaft 2 is rotated via the power transmission shaft by the output from the power output shaft of the tractor, the mission 3 of the input shaft 2 is activated. Therefore, the rotary work body 6 is rotationally driven in the up-cut direction via the output shaft 8 and the interlocking medium 9.
Then, as the machine advances, the rotary work body 6 rotates and the field is tilled and crushed one after another, and the rotary work body 6 tills and crushes the soil, and the soil mass is
It is strongly thrown against the elastic cover body 14, and is also guided by the elastic cover body 14, carried around rearward, and thrown towards the spring 42.

At this time, since the front end and the rear end of the elastic cover body 14 are supported by the coil springs 22 and 29, when a clod of earth is strongly thrown against the front part of the elastic cover body 14, the elastic cover body The left and right arms 12 supporting the front end portions of the left and right arms 14 are rotated in the vertical direction about their respective pivot axes 11 against the coil spring 29 at the front, and are rotated back and forth by the coil spring 22 at the rear. The left and right ends of the elastic cover body 14 are guided by the left and right resin plates 30 and the press plate 32, and are swung back and forth in the front and rear directions.

In addition, both left and right ends of the elastic cover body 14 are pressed from above by left and right holding plates 32, which are rotatably supported by a support shaft 31 and a holding part 37 of a spring 35, so that they are not affected by earth pressure. Therefore, even if the elastic cover body 14 is moved up and down while being elastically deformed, the left and right presser plates 32 and the resin plate 30 prevent the left and right ends of the elastic cover body 14 from being elastically deformed so as to be rolled up. This prevents soil clods from scattering outward from between the left and right ends of the elastic cover body 14 and the left and right brackets 4. Therefore, the elastic cover body 14 can be elastically deformed,
Due to the guiding action of the forward and backward movement and the up and down movement, the earth clods are smoothly fluidized rearward, and the earth clods are prevented from adhering to the elastic cover body 14.

In addition, as described above, among the soil clods thrown onto the screen 42, those that are larger than the gaps between the sieve rods 44 are guided downward along the sieve rods 44 and fall, and at the same time Smaller soil clods are removed from between each sieve rod 44 by leveling plate 46.
The soil is thrown toward the ground, guided downward along the leveling plate 46, and dropped onto the previously fallen large lumps of soil, which are successively leveled by the leveling plate 46.

In this case, the leveling plate 46 is the rotary work body 6
A hinge 4 is attached to the tilling section cover 39 that covers the upper part of the rear side.
5 are vertically rotatably connected, and the suspension support rod 47 attached to the leveling plate 46 is rotatably pivoted to the advance/retreat rod 51 which is supported to freely advance and retreat. During the leveling action of the leveling plate 46, when the lower working part 46a of the leveling plate 46 receives a relatively strong earth pressure exceeding the set pressure due to the large bulge of the tilled and crushed soil, the leveling plate 46 Due to the overload caused by the strong earth pressure, the guide body 53, which is wrapped around the advancing and retracting rod 51, rises almost vertically upward using the horizontal axis 45b on the front side of the hinge 45 as a pivot point against the coil spring 56 on one side. After being rotated and passing the overload, the coil spring 56 momentarily lowers again due to the restoring force and returns to the leveling action. Therefore, when the lower acting portion 46a of the leveling plate 46 receives a strong pressing force, or when the leveling plate 46 is tilted and one side receives a particularly strong pressing force, the leveling plate 46 continues to forcibly press them. It rises without causing any damage and instantly releases the soil, and always applies pressure to the tilled crushed soil at approximately the same pressing angle to perform a leveling action.

[Effect of idea]

According to the present invention, presser plates are provided on the inner upper part of the chain case and bracket of the main body frame to press both the left and right ends of the elastic cover body from above, so that the left and right ends of the elastic cover body are held down by these left and right presser plates. Both ends can be securely pressed down from above, and even if clods are strongly thrown by the rotary work unit against both left and right ends of the elastic cover body, the clods will hold down both left and right ends of the elastic cover body. It is possible to reliably prevent soil clods from scattering outward from between the left and right ends of the elastic cover body and the chain case and bracket by suppressing the elastic cover body from being elastically deformed so as to roll upward. In addition, the sufficient rocking motion of the elastic cover body can reliably prevent soil from adhering to the elastic cover body, and the rotary work body will not receive any resistance from the soil that is attached to it, so the rotary work body will not be able to land on the soil. As a result, there is no possibility of breakage or damage, and the fluidity of the soil mass that guides the soil mass backwards can be increased. Further, since the upper cover body for the rotary work body functions sufficiently by itself, the weight can be greatly reduced, and its structure is simple and easy to manufacture.

[Brief explanation of the drawing]

The figures show one embodiment of the present invention, in which Fig. 1 is a side view of the rotary tiller, Fig. 2 is a plan view of a part of the same, and Fig. 3 is a sectional view taken along line A-A in Fig. 2. ,
FIG. 4 is an exploded perspective view of a part of the cover device. 1...Body frame, 3...Mission, 4...
... Bracket, 5 ... Chain case, 6 ... Rotary work body, 12 ... Arm, 13 ... Pipe body, 14 ... Elastic cover body, 18 ... Rotating piece,
24...Support rod, 22, 29...Coil spring, 32...Press plate.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A main body frame that is equipped with a transmission having an input shaft and has a chain case and a bracket arranged oppositely at the lower left and right sides, and a main body frame that is located between the chain case and the bracket. a rotary work body that is rotatably provided and rotatably driven by the output from the transmission; and a rotary work body that is disposed on the main body frame between the chain case and the bracket and covers an upper part of the rotary work body. It is characterized by comprising: a swingable elastic cover body; and a presser plate disposed on the inner upper part of the chain case and bracket of the main body frame and presses down both left and right ends of the elastic cover body from above, respectively. Rotary tillage device. (2) The front end of the elastic cover body is fixed to a pipe body suspended horizontally between left and right arms rotatably connected to the left and right chain cases and brackets of the main body frame, and is supported by a coil spring provided via a support rod, and the rear end of the elastic cover body is attached to a rotating piece rotatably provided on the main body frame, and this rotating piece is Utility model registration claim 1, characterized in that the utility model is supported by a coil spring stretched between the body frame and the body frame.
Rotary tillage device as described in section.