JP2006187250A - Rotary tiller - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotary tiller that is equipped with a rotary cover covering the upper part of a tilling part and a rear cover covering the rear of the tilling part and connected through a hinge part to the rotary cover, has a simple constitution and a low cost to that extent and controls adhesion of soil to the hinge part without influencing an appearance. <P>SOLUTION: In the rotary tiller 100 equipped with the rotary cover 210 and the rear cover 230 rotatably connected through the hinge part 220 to the rotary cover 210, the rotary cover 210 is furnished with the hinge part 220 and a soil guard 211 arranged ahead of the vehicle of the hinge part 220 so as to form a gap area H between the hinge part 220 and the soil guard and the rear cover 230 is furnished with a soil adhesion prevention member 230a for preventing soil intrusion from an opening P at one end side of the gap area H to an opening P' at the other end side. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a rotary tiller.

  In a rotary cultivator comprising a rotary cover that covers the top of the tillage part, and a rear cover that covers the rear of the tillage part and is pivotally connected to the rotary cover via a hinge part. During work, there is a problem that soil scattered from the tillage part adheres to the rotary cover, the rear cover, or the hinge part, and hinders the tillage work.

  In particular, when the rotary cover is provided with a hinge part and a soil guard disposed in front of the hinge part so that a gap area is defined between the hinge part and the hinge part, When soil enters and the soil adheres to the hinge portion provided on the rotary cover, the adhered soil is hardened at the hinge portion, and the rear cover is fixed to the hinge portion by the hardened soil. The movement of the rear cover relative to the cover may be hindered.

  In order to prevent the soil from adhering to the hinge portion provided on the rotary cover, for example, as shown in FIGS. 8 and 9, the rotary cover C covering the top of the tillage portion B, and the tillage portion B The rotary cover C includes a rear cover D that covers the rear of the rear cover D and is pivotally connected to the rotary cover C via a hinge part E. The rotary cover C includes a hinge part E, A soil guard F is provided in front of the hinge portion E so as to define a gap region H between the hinge portion E and the rotary cover C. By inserting a rubber-like member G with an attachment member G ′ such as a bolt or a stay between the rear cover D and a rear cover D that is rotatable via a hinge portion E, soil enters the gap region H. To prevent However, in order to attach such a member G, a mounting member G ′ such as a bolt or a stay is required. Therefore, the structure for preventing soil adhesion to the hinge portion E is complicated, and the cost is high. . Further, since this member G is exposed between the rotary cover C and the rear cover D, it does not look good. FIG. 9 is an enlarged view of the portion α in FIG.

  Accordingly, the present invention provides a rotary cover that covers the top of the tillage part, and a rear cover that covers the rear of the tillage part and is pivotally connected to the rotary cover via a hinge part. An object of the present invention is to provide a rotary cultivator that is a cultivator and has a simple configuration, is low in cost, and can suppress adhesion of soil to the hinge portion without affecting the appearance.

In order to solve the above problems, the present invention provides the following first and second rotary tillers.
(1) A first rotary cultivator comprising: a rotary cover that covers the top of the tillage part; and a rear cover that covers the rear of the tillage part and is pivotally connected to the rotary cover via a hinge part. In the rotary cultivator provided, the rotary cover is provided with the hinge portion and a soil guard disposed in front of the hinge portion so that a gap region is defined between the hinge portion and the hinge portion. The rotary cover is provided with a soil adhesion preventing member for preventing soil from entering from the opening on one end side to the opening on the other end side of the gap region.

(2) a second rotary cultivator: a rotary cover that covers the top of the cultivating section; and a rear cover that covers the rear of the cultivating section, and is pivotally connected to the rotary cover via a hinge section. In the rotary cultivator provided, the rotary cover is provided with the hinge portion and a soil guard disposed in front of the hinge portion so that a gap region is defined between the hinge portion and the hinge portion. Further, the rotary cover is provided with a soil adhesion preventing member that closes the opening on the side close to the tillage portion of the gap area.

  In the first rotary cultivator according to the present invention, the rotary cover has a soil disposed in front of the hinge portion so that a gap region is defined between the hinge portion and the hinge portion. A guard is provided, and the rear cover is provided with a soil adhesion preventing member for preventing soil from entering from one end side opening of the gap region to the other end side opening. The soil can be prevented from entering the gap region, and further, the soil can be prevented from adhering to the hinge portion provided on the rotary cover. In addition, since the soil adhesion preventing member provided on the rear cover prevents the soil from entering the gap area, the soil adhesion to the hinge portion which is separate from the rear cover and the rotary cover. Therefore, there is no need for a dedicated member for preventing such a problem, and therefore, no attachment member such as a bolt or a stay is required. Thereby, the structure for preventing adhesion of soil to the hinge portion can be simplified, and the cost can be reduced accordingly. Furthermore, since the soil adhesion preventing member provided on the rear cover prevents soil from entering the gap area, the soil adhesion preventing member can be concealed between the rotary cover and the rear cover, As a result, it is possible to prevent the appearance from affecting the appearance so that the appearance is not visible.

  In the second rotary cultivator according to the present invention, the rotary cover has a soil disposed in front of the hinge portion so that a gap region is defined between the hinge portion and the hinge portion. Since the guard and the soil adhesion preventing member that closes the opening on the side close to the tillage part of the gap area are provided, the soil adhesion preventing member suppresses the entry of soil into the gap area, and The adhesion of soil to the hinge portion provided on the rotary cover can be suppressed. Further, since the soil adhesion preventing member provided on the rotary cover closes the opening on the side close to the tillage part of the gap area, the hinge part separated from the rear cover and the rotary cover. There is no need for a dedicated member for preventing soil from adhering to the surface, and therefore no attachment members such as bolts or stays are required. Thereby, the structure for preventing adhesion of soil to the hinge portion can be simplified, and the cost can be reduced accordingly. Further, since the soil adhesion preventing member provided on the rotary cover closes the opening of the gap area on the side close to the tillage portion, the soil adhesion preventing member is concealed between the rotary cover and the rear cover. This can be done so that it is not visible from the appearance and thus does not affect the appearance. In the second rotary cultivator according to the present invention, the rotary cover may be provided with another soil adhesion preventing member that closes the opening of the gap area on the side separated from the cultivating portion.

  As described above, according to the first and second rotary tillers according to the present invention, it is possible to suppress adhesion of soil to the hinge portion with a simple configuration, at a low cost, and without affecting the appearance. it can.

  As a specific aspect of the first rotary cultivator according to the present invention, the rear cover includes a bearing member that is externally rotatably attached to the hinge portion provided in the rotary cover, and the soil adhesion The case where the prevention member is provided in the said bearing member so that it may extend radially outward on the basis of the axis line of the said hinge part can be illustrated. In this case, the rear cover may be configured to be able to take a standard position with respect to the rotary cover and a raised position that is swung upward from the standard position around the hinge portion.

  As described above, the rear cover has a bearing member that is externally rotatably attached to the hinge portion provided on the rotary cover, and the soil adhesion preventing member has a diameter with respect to the axis of the hinge portion. The bearing member is provided so as to extend outward in the direction, and the rear cover is in a standard position with respect to the rotary cover, and a raised position that is swung upward from the standard position around the hinge portion. In the aspect configured to be able to take up the soil, when the rear cover is rotated to a predetermined rotational position where the rear cover is fully opened or close to the rotational position, Easy to penetrate. Therefore, the soil adhesion preventing member is located in the gap region when the rear cover is located at the standard position, and the soil in the gap region is removed by moving the rear cover from the standard position to the raised position. It is preferable to be configured to scrape. By doing so, the soil adhesion preventing member member has a role like a lid so that it is difficult for soil to enter the gap area, thereby reliably suppressing the intrusion of soil, Even if soil enters the gap area, for example, when the rear cover rotates during tillage work, the soil adhesion preventing member provided on the rotating rear cover scrapes the dirt in the gap area. Therefore, the adhesion of soil to the hinge portion can be suppressed accordingly.

  More preferably, when the rear cover is positioned at the standard position, the soil adhesion preventing member is located in the vicinity of the opening on the side close to the tillage portion of the gap area, and the gap area, respectively. A second soil adhesion preventing member positioned inside, wherein the second soil adhesion preventing member is configured to scrape the soil in the gap region by moving the rotary cover from the standard position to the raised position. The case can be illustrated. By doing so, the first soil adhesion preventing member can prevent the soil from entering the gap area in the vicinity of the opening, and even if the soil has entered the gap area, for example, tillage work Sometimes the rear cover is rotated, so that the second soil adhesion preventing member provided on the rotating rear cover can efficiently scrape the soil in the gap region, and the adhesion of the soil to the hinge portion accordingly. Can be suppressed.

  As a specific aspect of the second rotary cultivator according to the present invention, the rear cover includes a bearing member that is externally rotatably attached to the hinge portion provided on the rotary cover, and the soil adhesion The case where the prevention member is made into the elastic member provided in the earth guard so that a free end part may contact | abut to the bearing member of the said rear cover can be illustrated. By doing so, the soil adhesion preventing member has a role like a lid so that it is difficult for soil to enter the gap region, and thus the intrusion of soil can be reliably suppressed.

  As described above, according to the present invention, the rotary cover that covers the top of the tillage part, and the rear cover that covers the rear of the tillage part, the rear cover being rotatably connected to the rotary cover via a hinge part, It is possible to provide a rotary tiller having a simple configuration, which is low in cost, and can suppress adhesion of soil to the hinge portion without affecting the appearance.

  Hereinafter, preferred embodiments of a rotary tiller according to the present invention will be described with reference to the accompanying drawings. FIG. 1 is a schematic side view of a rotary cultivator 100 according to an embodiment of the present invention.

  As shown in FIG. 1, the rotary tiller 100 is attached to the main body of the working vehicle. In this embodiment, the rotary cultivator 100 is of a center rotary type.

  Specifically, the rotary tiller 100 includes an input shaft 110 that is operatively connected to a PTO shaft provided in this machine via a universal joint, and a transmission mechanism 300 (not shown in FIG. 1; see FIG. 4 described later). A drive shaft 120 operatively connected to the input shaft 110 via a cultivator, a cultivating section 130 having a cultivating claw 131 that cannot be rotated relative to the drive shaft 120, and a lift arm (not shown) provided in the machine. An upper arm 140 linked to the upper arm 140, and a rotor case 150 connected to the upper arm 140, the rotor case 150 supporting the input shaft 110 and the drive shaft 120 and accommodating the transmission mechanism 300. , A pair of main beams 160 respectively connected to both side surfaces of the rotor case 150, and a rotary cover 210 covering the top of the tiller 130. And a rear cover 230 covering the rear of the tilling unit 130.

  The rotary cover 210 is provided with the hinge part 220 and a soil guard 211 disposed in front of the hinge part 220 so that a gap region H is defined between the hinge part 220 and the hinge part 220. Yes. Further, the rear cover 230 has a leveling member 231 for leveling the soil behind the tillage portion 130, and the leveling member 231 moves up and down in response to a change in the height of the soil. As can be seen, the rotary cover 210 is pivotally connected to the rotary cover 210 via a hinge part 220. The rear cover 230 is provided with a soil adhesion preventing member 230a for preventing soil from entering from the one end side opening P of the gap region H to the other end side opening P '.

  FIG. 2 is a schematic side view showing a state in which the rear cover 230 is connected via the hinge 220 in the rotary tiller 100 shown in FIG. 1, and FIG. 2 (A) shows the rear cover 230 in a lower position. FIG. 2 (B) shows a state where the rear cover 230 is rotated upward. FIG. 3 is an exploded perspective view showing a state in which the rear cover 230 is connected to the rotary cover 210 through the hinge part 220.

  As shown in FIGS. 2 and 3, in the present embodiment, the rear cover 230 includes a bearing member 232 that is externally rotatably inserted into the hinge portion 220 provided in the rotary cover 210, and The soil adhesion preventing member 230a is provided on the bearing member 232 so as to extend radially outward with reference to the axis of the hinge portion 220. In FIG. 3, the hinge part 220 and the bearing member 232 are shown only on one side (left side in the figure), and the hinge part 220 and the bearing member 232 on the other side (right side in the figure) are not shown. It is.

  Specifically, the soil adhesion preventing member 230a extends across the entire vehicle width direction (Y direction in FIG. 3) of the gap region H, and is plate-shaped so as to cross the gap region H in a vehicle side view. Is formed. In the present embodiment, the soil adhesion preventing member 230a is made of the same material as the rear cover 230, and is integrally formed with the rear cover 230. Further, the rear cover 230 is in a standard position (see FIG. 2A) with respect to the rotary cover 210, and a raised position (FIG. 2B shown in FIG. 2B) swung upward from the standard position around the hinge portion 220. ))).

  More specifically, the soil adhesion preventing member 230a is located in the gap region H when the rear cover 230 is located at the standard position, and the rear cover 230 is moved from the standard position to the raised position. Thus, for example, the soil in the gap region H is scraped out by turning to a predetermined turning position that opens upward (X1 direction in FIG. 2B) during the tilling work of the rear cover 230. Yes. As a soil adhesion preventing member, in addition to the soil adhesion preventing member 230a, as shown by a broken line in FIG. 2, when the rear cover 230 is located at the standard position, A first soil adhesion preventing member 230a ′ positioned near the opening P on the adjacent side is provided, and the soil adhesion preventing member 230a is used as a second soil adhesion preventing member, and the second soil adhesion preventing member 230a is configured as the rotary cover. The soil in the gap region H may be scraped out by moving the 210 from the standard position to the raised position. At this time, the member 230a 'is a soil adhesion preventing member for preventing soil from entering.

  Here, the rear cover 230 is rotatably connected to the rotary cover 210 via the hinge part 220. For example, the rear cover 230 has a center part in the vehicle width direction Y (see β in FIG. 3). If the hinge portion 220 is provided in the middle portion β, the soil is more likely to enter at the central portion β than at both ends in the vehicle width direction Y, whereby the movement of the rear cover 230 is likely to be reduced. Therefore, in the present embodiment, the hinge portion 220 is provided at both ends of the rear cover 230 in the vehicle width direction Y. By doing so, the movement of the rear cover 230 does not decrease at the center portion in the vehicle width direction Y of the rear cover 230, so that the movement of the rear cover 230 can be maintained well. In the present embodiment, the soil adhesion preventing member 230a extends over the entire region of the gap region H in the vehicle width direction (Y direction in FIG. 3), but both end portions excluding the center portion in the vehicle width direction Y. It may be provided only in.

  FIG. 4 is a schematic cross-sectional view for explaining a transmission mechanism 300 that transmits the driving force from the input shaft 110 to the driving shaft 120.

  In FIG. 4, reference numeral 301 denotes a chain case, and the rotary cover 150 covers the outside of the chain case 301. Reference numeral 302 denotes a bearing case fixedly disposed on the chain case 301. In this transmission mechanism 300, a hinge 305 is supported on the bearing case 302 via a ball bearing 303 and an oil seal 304 provided on the inner side of the bearing case 302, and the hinge 305 has a shaft end in the cover 150. A sprocket 306 is fixed, and a chain 307 driven by a drive sprocket (not shown) on the machine side of the working vehicle is wound around the sprocket 306 so that the sprocket 306 is driven by power on the machine side. It is configured to drive.

  The inner end side of the hinge 305 inside the bearing case 302 is fixed to the drive shaft 120 by a bolt 308 with the outer end of the drive shaft 120 in contact therewith. Tillage claws 131 are fixed radially to the drive shaft 120.

  Here, in order to prevent foreign substances such as grass, straw, and thread from entering the oil seal, a dust cover that covers the oil seal is generally provided. For example, the dust cover is formed in a cylindrical shape. If the outer diameter of the hinge on the rotating side is smaller than the outer diameter of the fixed dust cover, it is easy to wind around the outer diameter portion of the hinge. If the dust cover enters inside through the gap of the dust cover, the oil seal will be broken, leading to problems such as oil leakage.

  Therefore, in the present embodiment, the dust cover 310 is fixedly disposed on the bearing case 302 and is formed in a tapered shape having an outer diameter that gradually increases toward the hinge 305 on the rotation side, and the hinge on the rotation side. The outer diameter of 305 (see d1 in the figure) is larger than the outer diameter of the dust cover 310 on the fixed side and closest to the hinge 305 (see d2 in the figure). Thus, by forming the dust cover 310 in the tapered shape, the foreign matter Q such as grass can be easily flowed to other than the gap 310 a of the dust cover 310, and the foreign matter Q is removed from the dust cover 310. Since it can be made difficult to collect in the vicinity of the gap 310a, the absolute amount of foreign matter in the dust cover 310 can be reduced. Further, the foreign matter Q such as grass tends to be wound around the smaller diameter side than the larger diameter side due to the bobbin winding action, so the outer diameter d1 of the hinge 305 on the rotating side is set to the dust cover 310 on the fixed side. By making the outer diameter d2 larger than the outer diameter d2, the foreign matter Q can be made difficult to be wound around the hinge 305, and the dust cover 310 having the outer diameter d2 smaller than the outer diameter d1 of the hinge 305 can be reduced. It can be made easy to flow to the dust cover 310 side along the outer surface. Accordingly, it is possible to make it difficult for the foreign object Q to enter the gap 310a of the dust cover 310, and to reduce the occurrence of oil leakage due to the breakage of the oil seal 304.

  In the transmission mechanism 300, the configuration on the side (hereinafter referred to as the driven side) opposite to the side on which the chain case 301, the sprocket 306 and the chain 307 are incorporated (hereinafter referred to as the driven side) is the chain case 301, Except for the incorporation of the sprocket 306 and the chain 307, the construction is substantially the same as the construction on the drive side.

  By the way, a protector for protecting the chain case 301 and the bearing case 302 from a concrete shore may be provided in the bearing case 302 or the like. In particular, when used in areas where the protector wears quickly, it is possible to increase the plate thickness of the material used for the protector, or to provide a special member with an iron plate welded to a standard built-in protector. Sometimes. However, there is a limit to increasing the thickness of the material used for the protector. In addition, if a special member welded with an iron plate is provided on a standard built-in protector, it becomes a specially ordered limited product, which increases costs and is often adapted to the field. Furthermore, since it is not known when to replace the protector, it may be used without noticing if the protector exceeds the wear limit.

  Therefore, in this embodiment, as shown in FIG. 5, a simple protector 321 is further attached to the outside of the standard built-in protector 320 attached to the bearing case 302 by a bolt 320a. FIG. 5 shows a state in which a simple protector 321 is further attached to the outside of a standard built-in protector 320 attached to the bearing case 302 on the driven side of the transmission mechanism 300. In the driven side configuration shown in FIG. 5, a side supporter 330 is provided instead of the chain case 301. Although not shown, a simple protector 321 is also provided in the bearing case 302 on the drive side as in the driven side.

  The simple protector 321 is attached to the standard built-in protector 320 by being tightened by two bolts 322 penetrating the simple protector 321 and the standard built-in protector 320 and nuts 323 attached to the bolts 322, respectively. ing. As shown in FIG. 6, in the simple protector 321, the bolt tightening portion R is provided with a counterbore 321 a in which the bolt head portion 322 a is dived about half. The simple protector 321 can use waste materials and the like. Therefore, it can be provided as an inexpensive one. In addition, since the simple protector 321 can be attached to the standard built-in protector 320 with a simple configuration that is simply tightened with a bolt 322, it is easy to perform on-site correspondence. Furthermore, since the bolt head 322a of the bolt protector 321 of the simple protector 321 is provided with a counterbore 321a in which about half of the bolt head 322a is submerged, the bolt head 322a is missing due to wear of the simple protector 321. When the simple protector 321 is detached from the bearing case 302, the replacement time of the simple protector 321 can be easily recognized.

  In the rotary cultivator 100 described above, the rotary cover 210 is disposed in front of the hinge portion 220 so that a gap region H is defined between the hinge portion 220 and the hinge portion 220. A soil guard 211 is provided, and the rear cover 230 is provided with a soil adhesion preventing member 230a for preventing soil from entering from the one end side opening P of the gap region H to the other end side opening P ′. Therefore, the soil adhesion preventing member 230 a can suppress the entry of soil into the gap region H, and further suppress the adhesion of soil to the hinge portion 220 provided in the rotary cover 210. Further, since the soil adhesion preventing member 230a provided on the rear cover 230 prevents the soil from entering the gap area H, the hinge portion separated from the rear cover 230 and the rotary cover 210. There is no need for a dedicated member for preventing soil from adhering to 220, and therefore no attachment members such as bolts or stays are required. Thereby, the structure for preventing adhesion of soil to the hinge part 220 can be simplified, and the cost can be reduced accordingly. Further, since the soil adhesion preventing member 230a provided on the rear cover 230 prevents the soil from entering the gap area H, the soil adhesion preventing member 230a is interposed between the rotary cover 210 and the rear cover 230. It can be concealed, so that it is not visible from the exterior and thus does not affect the appearance.

  Further, the rear cover 230 has a bearing member 232 that is externally rotatably inserted into the hinge part 220 provided in the rotary cover 210, and the soil adhesion preventing member 230 a is an axis of the hinge part 220. Is provided on the bearing member 232 so as to extend outward in the radial direction, and the rear cover 230 is in the standard position (see FIG. 2A) with respect to the rotary cover 210. The raised position (see FIG. 2B) can be taken, and the soil adhesion preventing member 230a is positioned in the gap region H when the rear cover 230 is positioned at the standard position. In addition, since the rear cover 230 is configured to scrape the soil in the gap region H by the movement from the standard position to the raised position, The prevention member member 230a has a role like a lid so that it is difficult for soil to enter the gap region H, and thus the intrusion of soil can be reliably suppressed. Even if soil enters, for example, when the rear cover 230 is rotated during tillage work, the soil adhesion preventing member 230a provided on the rotating rear cover 230 scrapes the soil in the gap region H. Therefore, the adhesion of soil to the hinge part 220 can be suppressed accordingly.

  Further, as the soil adhesion preventing member, in addition to the soil adhesion preventing member 230a, as shown by a broken line in FIG. 2, when the rear cover 230 is located at the standard position, a first position located near the opening P is also provided. A soil adhesion preventing member 230a ′ is provided, and the soil adhesion preventing member 230a is used as a second soil adhesion preventing member, and the second soil adhesion preventing member 230a moves from the standard position of the rotary cover 210 to the raised position. Therefore, when the soil in the gap region H is scraped out, the first soil adhesion preventing member 230a ′ prevents the soil from entering the gap region H in the vicinity of the opening P. Even if soil enters the gap area H, for example, the rear cover 230 rotates during the tilling operation, so that the rotating rear cover 230 By the second soil adherence prevention member 230a which kicked, soil can efficiently scrape out in the clearance region H, it is possible to correspondingly suppress the adhesion of soil to the hinge portion 220.

  FIG. 7 is a view showing a state in which a rear cover is connected via a hinge portion in a rotary cultivator according to another embodiment of the present invention, and shows a state in which the rear cover is disposed at a lower position. .

  This rotary tiller 100 'has substantially the same configuration as the rotary tiller 100 shown in FIG. 1 except that the arrangement configuration of the soil adhesion preventing member is different. Hereinafter, the rotary cultivator 100 ′ illustrated in FIG. 7 will be described with a focus on portions different from the rotary cultivator 100 illustrated in FIG. 1, and description of common portions will be omitted.

  A rotary tiller 100 ′ shown in FIG. 7 includes an input shaft, a drive shaft, an upper arm, a rotor case, a main beam (not shown), and a tiller 130. These members are substantially the same as the input shaft 110, the drive shaft 120, the upper arm 140, the rotor case 150, the main beam 160, the tiller 130, and the like of the rotary tiller 100 shown in FIG. In the following description, the same reference numerals are used.

  The rotary cultivator 100 ′ further includes a rotary cover 210 ′ that covers the top of the cultivator 130 and a rear cover 230 ′ that covers the rear of the cultivator 130.

  The rotary cover 210 ′ is provided with the hinge portion 220 and a soil guard 211 disposed in front of the hinge portion 220 so that a gap region H is defined between the hinge portion 220 and the hinge portion 220. ing. The rotary cover 210 ′ is further provided with a soil adhesion preventing member 210 a that closes the opening P on the side close to the tillage part 130 of the gap region H.

  The rear cover 230 ′ has a leveling member 231 (not shown in FIG. 7, see FIG. 1) for leveling the soil behind the tillage unit 130, as in the rotary tiller 100 shown in FIG. The ground leveling member 231 is pivotally connected to the rotary cover 210 ′ via a hinge 220 so that the leveling member 231 can move up and down in response to a change in soil height.

  The rear cover 230 ′ has a bearing member 232 that is externally rotatably attached to the hinge portion 220 provided on the rotary cover 210 ′, and the soil adhesion preventing member 210 a is free in this embodiment. The end portion is an elastic member provided on the earth guard 211 so as to contact the bearing member 232 of the rear cover 230 ′. In the present embodiment, the soil adhesion preventing member 210a is formed by welding a rubber member having a triangular shape in cross section to the soil guard 211. Further, the rear cover 230 ′ may be provided with a soil adhesion preventing member (second soil adhesion preventing member) 230 a as shown in FIGS. 1 to 3. In this case, since the soil adhesion preventing member 210a provided on the soil guard 211 is a rubber member, for example, when the rear cover 230 ′ is raised, the second soil adhesion preventing member 230a provided on the rear cover 230 ′ is The soil adhesion preventing member 210a provided on the soil guard 211 can be easily overcome. Further, as shown by a broken line in FIG. 7, the rotary cover 210 ′ is provided with another soil adhesion preventing member 210 a ′ that closes the opening P ′ on the side separated from the tilling part 130 of the gap region H. It may be. Further, the soil adhesion preventing member 210a may extend over the entire region of the gap region H in the vehicle width direction, or may be provided only at both end portions excluding the central portion in the vehicle width direction.

  In the rotary cultivator 100 ′ described above, the rotary cover 210 ′ is arranged in front of the hinge part 220 so that a gap region H is defined between the hinge part 220 and the hinge part 220. Since the soil guard 211 provided and the soil adhesion preventing member 210a for closing the opening P on the side close to the tillage part 130 of the gap region H are provided, the soil adhesion preventing member 210a allows the gap region Infiltration of soil into H can be suppressed, and furthermore, adhesion of soil to the hinge portion 220 provided in the rotary cover 210 ′ can be suppressed. Further, since the soil adhesion preventing member 210a provided on the rotary cover 210 ′ closes the opening P, the hinge portion 220 is separated from the rear cover 230 ′ and the rotary cover 210 ′. Therefore, a special member for preventing the adhesion of soil is not required, and therefore, attachment members such as bolts and stays are also unnecessary. Thereby, the structure for preventing adhesion of soil to the hinge part 220 can be simplified, and the cost can be reduced accordingly. Further, since the soil adhesion preventing member 210a provided on the rotary cover 210 ′ closes the opening P, the soil adhesion preventing member 210a is concealed between the rotary cover 210 ′ and the rear cover 230 ′. This can be made invisible to the appearance and thus not affect the appearance.

  Further, the rear cover 230 ′ has a bearing member 232 that is externally rotatably attached to the hinge portion 220 provided on the rotary cover 210 ′, and the soil adhesion preventing member 210a has a free end portion. Since the elastic member provided on the earth guard 211 is in contact with the bearing member 232 of the rear cover 230 ′, the earth adhesion preventing member 210 a is a lid so that the earth does not easily enter the gap area H. As a result, it is possible to reliably suppress the invasion of soil.

  As described above, according to the rotary cultivator 100, 100 ′ according to the present embodiment, it is possible to suppress adhesion of soil to the hinge portion 220 with a simple configuration, at a low cost, and without affecting the appearance. be able to.

FIG. 1 is a schematic side view of a rotary tiller that is an embodiment of the present invention. FIG. 2 is a schematic side view showing a state in which the rear cover is connected via a hinge portion in the rotary tiller shown in FIG. 1, and FIG. 2 (A) is a state in which the rear cover is arranged at a lower position. FIG. 2B is a diagram illustrating a state in which the rear cover is rotated upward. FIG. 3 is an exploded perspective view showing a state in which the rear cover is connected to the rotary cover via the hinge portion. FIG. 4 is a schematic cross-sectional view for explaining a transmission mechanism that transmits the driving force from the input shaft to the driving shaft. FIG. 5 is an exploded perspective view showing a state in which a simple protector is further attached to the outside of a standard built-in protector attached to the bearing case on the driven side of the transmission mechanism. FIG. 6 is a schematic cross-sectional view showing a bolt fastening portion of the simple protector. FIG. 7 is a view showing a state in which a rear cover is connected via a hinge part in a rotary cultivator according to another embodiment of the present invention, and schematically shows a state in which the rear cover is arranged at a lower position. It is a side view. FIG. 8 shows a state where a member for preventing soil from adhering to the hinge portion, which is separate from the rear cover and the rotary cover, is attached between the rotary cover and the rear cover in the rotary tiller. FIG. FIG. 9 is an enlarged view of the portion α in FIG.

Explanation of symbols

100,100 '... rotary cultivator 130 ... cultivation part
210, 210 '... Rotary cover 211 ... Soil guard 220 ... Hinge part
230, 230 '... rear cover 230a ... soil adhesion preventing member (second soil adhesion preventing member)
230a '... first soil adhesion preventing member 210a, 210a' ... soil adhesion preventing member
232 ... Bearing member H ... Gap area P ... Opening of the gap area

Claims (7)

In a rotary cultivator comprising a rotary cover that covers the top of the tillage part, and a rear cover that covers the rear of the tillage part and is pivotally connected to the rotary cover via a hinge part.
The rotary cover is provided with the hinge portion and a soil guard disposed in front of the hinge portion so that a gap region is defined between the hinge portion and the hinge portion,
The rotary cultivator according to claim 1, wherein a soil adhesion preventing member is provided on the rear cover to prevent soil from entering from the opening on one end side to the opening on the other end side of the gap region. The rear cover includes a bearing member that is externally rotatably inserted into the hinge portion provided on the rotary cover.
The rotary tiller according to claim 1, wherein the soil adhesion preventing member is provided on the bearing member so as to extend outward in the radial direction with reference to an axis of the hinge portion. The rear cover is configured to be able to take a standard position with respect to the rotary cover and a raised position swung upward from the standard position around the hinge portion.
The soil adhesion preventing member is positioned in the gap region when the rear cover is in the standard position, and scrapes the soil in the gap region by moving the rear cover from the standard position to the raised position. The rotary cultivator according to claim 2, wherein the rotary cultivator is configured as follows. The rear cover is configured to be able to take a standard position with respect to the rotary cover and a raised position swung upward from the standard position around the hinge portion.
When the rear cover is positioned at the standard position, the soil adhesion preventing member is positioned in the first soil adhesion preventing member and the clearance area, which are positioned in the vicinity of the opening on the side close to the tillage portion of the clearance area, respectively. Including a second soil adhesion preventing member,
3. The rotary tillage according to claim 2, wherein the second soil adhesion preventing member is configured to scrape the soil in the gap region by moving the rotary cover from a standard position to a raised position. Machine. In a rotary cultivator comprising a rotary cover that covers the top of the tillage part, and a rear cover that covers the rear of the tillage part and is pivotally connected to the rotary cover via a hinge part.
The rotary cover is provided with the hinge portion and a soil guard disposed in front of the hinge portion so that a gap region is defined between the hinge portion and the hinge portion,
Further, the rotary cover is provided with a soil adhesion preventing member that closes an opening on a side close to the tillage portion of the gap area.   The rotary tiller according to claim 5, wherein the rotary cover is provided with another soil adhesion preventing member that closes an opening on a side separated from the tillage portion of the gap area. The rear cover includes a bearing member that is externally rotatably inserted into the hinge portion provided on the rotary cover.
The rotary tiller according to claim 5 or 6, wherein the soil adhesion preventing member is an elastic member provided on the soil guard so that a free end thereof is in contact with a bearing member of the rear cover. .

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