JP2010124771A - Rotary tiller cover - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve problems of a conventional rotary tiller cover including difficulty in attaching a rear cover at a rear end of a rotary cover, liable to form steps on a rubber sheet covering a lower side part of a cover shaft by tilting motion of the rear cover, liable to peel by friction resistance of tilled soil, when the rubber sheet has a sheet bonding part, and scattering and adhesion of soil to a cover shaft by damage, opening of broken hole, etc., of the rubber sheet caused by strong soil resistance. <P>SOLUTION: A rear cover 4 vertically tiltable around a cover shaft 3 along a rear edge of the rotary cover 2 is attached to the rear end of the rotary cover 2 formed by pasting a synthetic resin sheet 1, a front part of a rubber sheet 5 laid along a lower face of the rear cover 4 is extended in a form of a single sheet to form a vertically flexible front sheet part 6, and a front edge of the front sheet part 6 is attached and connected by superposing the front edge to a lower face of a synthetic resin sheet cover 1 under a rear end of the rotary cover 2. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a rotary tillage cover that covers the rotary upper peripheral portion of a rotary tillage claw, and forms a rubber sheet that prevents mud from scattering to the upper surface of a continuous portion of a rear cover with respect to the rotary cover.

A technique for providing a rubber sheet that covers the lower side of the cover shaft portion between the continuous portions of the rotary cover and the rear cover (see, for example, Patent Document 1) is known.
Japanese Patent Laying-Open No. 2005-341847 (page 5, FIG. 1).

  The rear cover attached to the rear end portion of the rotary cover so as to be pivotable up and down by the cover shaft has a complicated mounting structure, and the rubber sheet covering the lower side portion of the cover shaft by the vertical rotation of the rear cover has a stepped portion. It is easy to occur, if there is a sheet joint in this rubber sheet part, it receives frictional resistance due to cultivated soil, it is easy to peel off, this rubber sheet part receives strong soil resistance, damages, and generates broken holes, It becomes easy for the soil to scatter and adhere to the cover shaft.

  According to the first aspect of the present invention, a rear cover that can be rotated up and down around a cover shaft 3 along the direction of the rear end edge of the rotary cover 2 is provided at the rear end of the rotary cover 2 on which the synthetic resin sheet 1 is stretched. 4, and the front part of the rubber sheet 5 laid along the lower surface of the rear cover 4 is extended into a single sheet to form a front seat part 6 that can be bent up and down. The front edge of the front seat part 6 The rotary tiller cover is characterized in that the portion is overlapped and connected to the lower surface of the synthetic resin sheet cover 1 on the lower surface of the rear end of the rotary cover 2. The soil cultivated by the rotation of the tillage is scraped away from the rear lower part to the upper part. The cultivated soil is received by the rubber sheet 5 of the rear cover 4 at the rear upper portion and falls to the cultivated soil surface on the side of the cultivated trace, and is crushed by the rear lower end crushed portion 20 of the rear cover 4. The cultivated part of the cultivated soil is guided along the lower surface of the rubber sheet 5 over the front seat portion 6 and the synthetic resin sheet 1 portion of the rotary cover 2. Since the sheet is formed in a series of sheets over the portion 6, even if the rear cover 4 is rotated up and down around the cover shaft 3, a large step portion due to bending is hardly generated in the front seat portion 6, and the rubber Since the joint part of the sheet is not formed, even if it receives frictional resistance due to the sliding contact soil, the plowing soil is smoothly slid and guided so that the front sheet part 6 is not turned over or peeled off. Reduce frictional resistance caused by scattered soil. Further, since the front end edge of the front seat portion 6 is polymerized and connected to the lower surface of the synthetic resin sheet 1 of the rotary cover 2, the configuration is simple and the sliding guidance of the tilled soil is performed smoothly.

  According to the first aspect of the present invention, the front seat portion 6 that covers the cover shaft 3 portion between the rotary cover 2 and the rear cover 4 is attached to the rear cover 4 by a single front extension of the rubber sheet 5. Therefore, the front seat portion 6 can be configured and attached easily and easily. The seam of the front seat portion 6 is not formed, and the sliding resistance is reduced even when the cultivation soil is scattered. The front seat portion 6 is less damaged and broken, and the durability can be improved, and the scattering and adhesion of soil to the cover shaft 3 portion can be eliminated, and the rear cover 4 can be guided. The vertical movement and the pressure-reducing action can be performed smoothly.

  Based on the drawings, the rotary tiller 7 attached to the rear portion of the tractor is attached via a top link of a lift link mechanism that is lifted and lowered by a lift arm, a lower link, or the like. Under the mast 10 having the link hitch pins 8 and 9 to be attached to the lift link mechanism and the input transmission case 12 integrally formed with the bracket 11, a tilling case 14 with a tilling shaft 13 is formed, and this input The transmission shaft 16 is geared in the forward rotation A or reverse rotation from the input shaft 15 provided on the front side of the transmission case 12, and the tillage shaft 13 is chain-transmitted from the transmission shaft 16. The tilling shaft 13 has a center drive configuration in which the tilling shaft 13 is axially mounted by projecting from the tilling case 14 at the center of the tilling width to both the left and right sides. It is also possible to adopt a side drive configuration in which the end portion is supported by bearing. A tilling claw 17 is arranged around the tilling shaft 13, and the tilling action can be performed by driving the tilling claw 17 in the forward rotation A or the reverse rotation.

  The rotary cover 2 covering the rotation upper peripheral surface of the tilling claw 17 is formed in a circular arc shape by sheet metal and is attached to the tilling case 14. The rotary cover 2 is configured to be adjustable to rotate back and forth around the tilling shaft 13 with respect to the tilling case 14. A synthetic resin sheet (which can be formed on a board, a panel, or a mat member) 1 is attached along the lower surface of the rotary cover 2 and attached integrally by screws 18 and 19.

  A horizontal cover shaft 3 is provided on the rear end portion of the rotary cover 2, and a rear cover 4 that can be turned up and down is attached and installed around the cover shaft 3. A pressure-reducing portion 20 is formed at the rear end of the rear cover 4 so that the cultivated soil surface can be suppressed and leveled. A rubber sheet (which can be formed on a board, a panel, or a mat member) 5 is attached and laid with screws 21 and 22 along the lower surface of the rear cover 4. The rubber sheet 5 is formed with an appropriate space 23 between the lower surface of the rear cover 4 so that the rubber sheet 5 is easily vibrated or distorted by elasticity. For this reason, the insertion part of each screw 21, 22 has the rubber sheet 5 recessed toward the surface of the rear cover 4, and the presser plate 33 and the screws 21, 22 are fitted into this recess 24.

  Here, a rear cover 4 that can be turned up and down around a cover shaft 3 along the direction of the rear end edge of the rotary cover 2 is provided at the rear end portion of the rotary cover 2 on which the synthetic resin sheet 1 is stretched. The front portion of the rubber sheet 5 laid along the lower surface of the rear cover 4 is extended in a single sheet to form a front seat portion 6 that can be bent up and down, and the front edge portion of the front seat portion 6 is formed on the rotary cover 2. It superposes on the lower surface of the synthetic resin sheet cover 1 on the lower surface of the rear end and is attached and connected.

  The soil cultivated by the rotation of the cultivating shaft 13 and the cultivating claw 17 is scraped away from the rear lower part to the upper part. The cultivated soil is received by the rubber sheet 5 of the rear cover 4 at the rear upper portion and falls on the soil surface of the cultivated trace while being buffered, and is crushed by the crushed portion 20 at the rear lower end of the rear cover 4. The cultivated part of the cultivated soil is guided along the lower surface of the rubber sheet 5 over the front seat portion 6 and the synthetic resin sheet 1 portion of the rotary cover 2. Since the sheet is formed in a series of sheets over the part 6, even if the rear cover 4 is rotated up and down around the cover shaft 3, it is difficult to produce a large step due to bending in the front seat part 6. Reduce soil scattering resistance. Further, since the front end edge of the front seat portion 6 is polymerized and connected to the lower surface of the synthetic resin sheet 1 of the rotary cover 2, the configuration is simple and the slidable contact guidance of the tilled soil is performed smoothly.

  The rubber sheet 5 is formed such that the front end portion is extended to the rotary cover 2 side and the front seat portion 6 is formed and the seam is not formed. In the vicinity of the cover shaft 3 of the rubber sheet 5, the front seat portion 6 attached to the rear cover 4 by the screw 21 and projecting forward is provided between the rear end edge of the rotary cover 2 and the front end edge of the rear cover 4. Cover interval portion 25 and the cover shaft 3 portion located on the cover interval portion 25 are provided so as to cover the lower side, and the front edge of the front seat portion 6 is made of synthetic resin at the rear end of the rotary cover 2. The bottom surface of the sheet 1 is superposed and attached and connected.

  The upper surface of the rear end of the rotary cover 2 has a bracket 26. The rear end of the rotary cover 2 supports the cover shaft 3 of the rear cover 4. The upper support shaft 27, the support shaft 28 of the rear cover 4 rear bracket 29, In the meantime, a spring damper is provided, and the rear cover 4 is repelled downward with respect to the rotary cover 2 to maintain the suppression pressure. The rear end edge portion of the synthetic resin sheet 1 on the lower surface of the rotary cover 2 is attached to the bracket 26 by the screw 19. Then, the front end edge of the front seat portion 6 protruding from the rear cover 4 side is overlapped with the attachment portion by the screw 19 and attached by fastening with the screw 31 with the presser plate 30 interposed. The tightening position B by these screws 19 and the tightening position C by 31 are set at different positions in the lateral direction. At the position of the screw 19 of the front seat portion 6, a seat hole 32 for fitting the screw head of the screw 19 is formed, and the presser plate 30 is superposed on the seat hole 32 portion. In this way, the front seat portion 6 that is attached to and connected to the rotary cover 2 by the screw 31 is appropriately loosened so that the rear cover 4 can be smoothly turned up and down, and the rear cover 4 can be greatly increased upward. By rotating it, the rear side of the rotary tilling claw 17 part can be largely opened.

  When the tilling claw 17 rotates forward A, the tilled soil is scattered rearward and upward, received by the rubber sheet 5 part of the upper rear cover 4 part, and dropped downward, and this tilled soil surface is placed behind the rear cover 4. The pressure is suppressed by the pressure suppression unit 20 at the end and leveled. Part of the soil at the time of tillage is scattered in the direction of the rotation A of the tillage claw 17 and attached to the lower part of the rotary cover 2 from the lower part of the rear cover 4 through the lower part of the cover interval part 25. Be turned around. At this time, the rubber sheet 5 at the lower side of the rear cover 4 receives vibration and distortion due to the scattering collision of the cultivated soil, prevents soil adhesion, and promotes and maintains soil detachment and fall. Further, since the tilled soil scattered or guided from the surface of the rubber sheet 5 toward the front sheet portion 6 does not form the joint of the rubber sheet 5 or the joint step portion due to the formation of the single plate shape, Sliding of the soil is performed smoothly, and the resistance to tilling of the cultivated soil is reduced, so that the joint portion is not turned over or damaged, and the falling off of the front seat portion 6 can be performed smoothly. . In this way, the tilled soil part scattered through the front sheet part 6 to the rotary cover 2 part is guided along the surface of the synthetic resin sheet 1 and is hardly attached and dropped.

  During such tilling action, the rear cover 4 can be rotated up and down by fluctuations in tilling depth, etc., but in order to prevent the cultivation soil from adhering to the cover shaft 3 part, the rear cover 4 can be rotated smoothly. Can be done.

The side view of a rotary tillage cover part. The side view which shows the front seat part attachment state of the rotary cover part. The one part disassembled perspective view and sectional drawing which shows the attachment state of an attachment screw part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Synthetic resin sheet 2 Rotary cover 3 Cover axis | shaft 4 Rear cover 5 Rubber sheet 6 Front seat part

Claims (1)

  On the rear end of the rotary cover (2) on which the synthetic resin sheet (1) is stretched, a rear cover that can be turned up and down around a cover shaft (3) along the direction of the rear end edge of the rotary cover (2) ( 4), and the front portion of the rubber sheet (5) laid along the lower surface of the rear cover (4) is extended into a single sheet to form a front seat portion (6) that can be bent up and down. A rotary tillage cover, wherein the front edge portion of the front seat portion 6 is overlapped and connected to the lower surface of the synthetic resin sheet cover (1) on the lower surface of the rear end of the rotary cover (2).

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