Agricultural machinery
The agricultural machine optimizes gas spring placement and transmission by aligning pivot points with the rotation axis, enhancing structural strength and efficiency in folding and unfolding lateral work sections.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- KOBASHI KOGYO
- Filing Date
- 2024-12-27
- Publication Date
- 2026-07-09
Smart Images
Figure 2026115412000001_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to an agricultural working machine having a left working part and / or a right working part that is supported so as to be openable and closable to the left and / or right with respect to a central working part.
Background Art
[0002] Conventionally, in order to work over a wide width, an agricultural working machine provided with extension working parts rotatably supported at both left and right ends of a central working part connected to the rear of a traveling vehicle body such as a tractor is known. (Patent Document 1)
Prior Art Documents
Patent Documents
[0003]
Patent Document 1
Summary of the Invention
Problems to be Solved by the Invention
[0004] Conventionally, a hydraulic cylinder is provided between a central working part and an extension working part, and an agricultural working machine that can be rotated between a folded non-working state and a deployed working state by rotating the extension working part up and down with respect to the central working part by this hydraulic cylinder is known. Among such agricultural working machines, as described in Patent Document 1, there is one in which a gas spring for assisting the up-and-down rotation by a hydraulic cylinder is disposed between the central working part and the extension working part. The ends of the gas springs are respectively attached to a cover part that covers the tilling means of the central working part and the extension working part. Therefore, in addition to the stroke of the gas spring required for opening and closing and rotating the extension working part becoming long, it is necessary to give sufficient strength to the cover part to which the gas spring is attached. In addition, the attachment position of the gas spring on the central working part side is arranged at a position away from the rotation axis of the extension working part, and there is a problem that the assisting force of the gas spring cannot be efficiently transmitted to the extension working part.
[0005] Therefore, the object of the present invention is to solve the above problems and provide an agricultural machine with an optimized arrangement of gas springs. [Means for solving the problem]
[0006] To solve these problems, the present invention has the following configuration. A mounting section connected to the vehicle body, and a central working section having support frames extending to the left and right to which the mounting section is connected, A lateral work section is connected to at least one end of the central work section in a manner that allows it to be folded and unfolded, A drive means for folding and unfolding the lateral work section relative to the central work section, The system includes a drive assisting means for assisting the folding and unfolding of the lateral work section by the drive means, One end of the drive assist means is attached to the support frame, and the other end is attached to the lateral work section. A farming machine characterized by the following features. [Effects of the Invention]
[0007] This allows us to provide agricultural machinery with improved gas spring installation strength and optimized gas spring placement. [Brief explanation of the drawing]
[0008] [Figure 1] This is a rear view of Halo A (open state) of Embodiment 1 of the present invention. [Figure 2] This is a view from the front of Halo A (open state) of Embodiment 1 of the present invention. [Figure 3] This is a perspective view of Halo A (open state) of Embodiment 1 of the present invention, viewed from the left front. [Figure 4] This is a view of the halo A (open state) of Embodiment 1 of the present invention, seen from the left side. [Figure 5] This is a view from the front of Halo A (closed state) of Embodiment 1 of the present invention. [Figure 6] Perspective view of the halo A (closed state) of Embodiment 1 of the present invention as seen from the left front. [Figure 7] View of the halo A (closed state) of Embodiment 1 of the present invention as seen from the left side. [Figure 8] View showing the frame 2 of the halo A of Embodiment 1 of the present invention. [Figure 9] View showing the rake 38 attached to the left apron 35L of the halo A of Embodiment 1 of the present invention. [Figure 10] View showing the remote control 9 used for the halo A of Embodiment 1 of the present invention. [Figure 11] View showing the halo A (open state) of Embodiment 2 of the present invention. [Figure 12] View showing the halo A (closed state) of Embodiment 2 of the present invention.
Mode for Carrying Out the Invention
[0009] [Embodiment 1] Hereinafter, the halo A, which is Embodiment 1 of the present invention, will be described with reference to the drawings. Note that the agricultural working machine is not limited to the halo, and other agricultural working machines such as a rotary tiller may also be used. In the following description, the same reference numerals in different figures indicate parts having the same function, and redundant descriptions in each figure will be omitted as appropriate. Also, for the sake of convenience of explanation, terms indicating directions such as up, down, front, rear, right, and left are used. The direction in which gravity acts is down, and the opposite is up. Also, the direction in which the traveling vehicle body moves forward is front, and the opposite is rear. Further, looking forward, the right side is right and the left side is left.
[0010] [Overall Configuration] FIG. 1 is a view of the halo A of Embodiment 1 of the present invention as seen from the rear, FIG. 2 is a view as seen from the front, FIG. 3 is a perspective view as seen from the left front, and FIG. 4 is a view as seen from the left side. Each shows a view of the open state in which the left working part 3L and the right working part 3R are deployed outside the central working part 3C. Further, FIG. 5 is a front view of the harrow A according to Embodiment 1 of the present invention, FIG. 6 is a perspective view seen from the front left, and FIG. 7 is a view seen from the left side. Each shows a closed state in which the left working section 3L and the right working section 3R are folded above the central working section 3C. FIGS. 1 to 7 show the posture of the harrow A in a workable state where weeding work and the like are possible, that is, the workable posture. The harrow A in the present Embodiment 1 is an agricultural working machine used for weeding work and the like, and includes a mounting section 1, a frame 2, and a working section 3. The harrow A is connected to a traveling vehicle body (not shown), such as a tractor, by the mounting section 1. The mounting section 1 is connected to the frame 2, and the working section 3 is supported by the frame 2. Thereby, the harrow A is connected to the traveling vehicle body and performs weeding work and the like by the working section 3 while moving following the traveling of the traveling vehicle body.
[0011] The harrow A of the present Embodiment 1 has a width (width in the left-right direction) wider than the width of the traveling vehicle body, and both the left and right sides of the harrow A protrude from the traveling vehicle body to the left and right sides. Therefore, when moving from the garage to the field, when moving between fields, etc., in order to narrow the width, the working sections 3 on both the left and right sides are configured to be foldable (openable and closable) toward the central part side. The working section 3 is composed of three working sections: a central working section 3C connected to the traveling vehicle body via the mounting section 1, a left working section 3L rotatably connected to the central working section 3C, and a right working section 3R. The left working section 3L and the right working section 3R are substantially symmetrical left and right and have substantially the same configuration. In the present Embodiment 1, the working section configured to be foldable toward the central part side is connected to both the left and right sides, but it may also be connected to only one of the left and right sides with the working section configured to be foldable (openable and closable) toward the central part side.
[0012] [Mounting section] The mounting section 1 is connected to a three-point link mechanism (not shown) provided at the rear of the traveling vehicle body. The three-point link mechanism is usually composed of a top link, a lift rod, a lower link, and the like. Since the three-point link mechanism is a known mechanism, a detailed description thereof is omitted. The mounting section 1 includes a top mast 11 connected to the top link and a lower link connecting section (not shown) connected to the lower link. Harrow A can be raised and lowered via the mounting section 1 using a three-point linkage mechanism.
[0013] [frame] Frame 2 has a gearbox 21 to which the top mast 11 is connected, and a support frame 22 connected to the gearbox 21. The gearbox 21 is located in the center between the left support frame 22L and the right support frame 22R of the support frame 22, which will be described later. The gearbox 21 has a power input shaft 211. Power from the PTO shaft (not shown) of the running vehicle body is transmitted to the power input shaft 211 via a universal joint (not shown). A bevel gear (not shown) is also housed inside the gearbox 21, and power from the power input shaft 211 is transmitted to the power transmission shaft via the bevel gear. The support frame 22 is the main frame of the harrow A and supports the work section 3. The support frame 22 is divided into a left support frame 22L that extends to the left and a right support frame 22R that extends to the right, with the gearbox 21 in between. Both the left support frame 22L and the right support frame 22R are cylindrical in shape, and can house a power transmission shaft that transmits power from the gearbox 21. In this embodiment 1, a power transmission shaft (not shown) is housed within the left support frame 22L, and power from the power input shaft 211 is transmitted via the bevel gear in the gearbox 21 and the power transmission shaft in the left support frame 22L to a chain (not shown) in the chain case 23 located at the left end of the left support frame 22L.
[0014] Figure 8 shows the frame 2 of the halo A according to Embodiment 1 of the present invention, with the gearbox 21 and right support frame 22R viewed from above, and the left support frame 22L shown in cross-sectional view. Note that the power transmission shaft inside the left support frame 22L is omitted in Figure 8. A chain case 23 is fixed to the outer end of the left support frame 22L, and a power transmission shaft that transmits power from the bevel gear in the gearbox 21 to the chain in the chain case 23 is housed inside the left support frame 22L. Lubricating oil is sealed inside the gearbox 21, left support frame 22L, and chain case 23. A fixing member 22L2 for securing the chain case 23 is fixed to the outer end of the left support frame 22L. The fixing member 22L2 is provided with an insertion hole 22La through which a power transmission shaft can be inserted. The opening 22Lb on the right side (gearbox 21 side) of the insertion hole 22La has an inner diameter that is the same as the outer diameter of the left support frame 22L, so that the left support frame 22L can be inserted. The inner diameter of the insertion hole 22La is formed to be smaller than the inner diameter of the opening 22Lb. A step 22Lc is created due to the difference in the inner diameter of the insertion hole 22La and the opening 22Lb. This step 22Lc prevents the lubricating oil in the gearbox 21 and left support frame 22L from flowing out to the chain case 23 side via the fixing member 22L2.
[0015] Conventionally, to prevent lubricating oil from the gearbox 21 and left support frame 22L from leaking to the chain case 23 side due to tilting or vibration of the halo A, a sealing material was provided between the inner surface of the left support frame 22L or the fixing member 22L2 and the power transmission shaft. However, in this embodiment 1, the shape of the fixing member 22L2 is modified so that the inner diameter of the insertion hole 22La is smaller than the inner diameter of the opening 22Lb, and a step 22Lc is formed, thereby preventing lubricating oil from the gearbox 21 and left support frame 22L from leaking to the chain case 23 side. As a result, it is no longer necessary to provide a sealing material between the inner surface of the left support frame 22L or the fixing member 22L2 and the power transmission shaft to prevent lubricating oil leakage, which simplifies the structure and reduces costs.
[0016] Left support sections and right support sections are attached to the outer ends of the left support frame 22L and the right support frame 22R, respectively, connecting the left support frame 22L and the right support frame 22R to the central work section 3C. A chain case 23, capable of storing a chain inside, is located on the left side of the left support section. The output shaft of the chain inside the chain case 23 is the rotation shaft 312C of the central working rotor 31C of the central working section 3C, and the chain inside the chain case 23 transmits power from the power transmission shaft inside the left support frame 22L to the central working rotor 31C. A clutch CL (see Figure 7; however, Figure 7 only shows the clutch CL between the left end of the rotation axis 312C of the central working rotor 31C of the central working section 3C and the right end of the rotation axis 312L of the left working rotor 31L of the left working section 3L) is installed between the right end of the rotation axis 312C of the central working rotor 31C of the central working section 3C and the left end of the rotation axis 312L of the left working rotor 31L of the left working section 3L). This clutch CL allows for the switching of power transmission from the rotating shaft 312C of the central working section 3C to the rotating shaft 312L of the left working section 3L and the rotating shaft 312R of the right working section 3R when the left working section 3L and the right working section 3R are opened and closed. In other words, when the left work section 3L and the right work section 3R are in the closed (folded) state, the clutch CL is disengaged, and power is not transmitted from the rotating shaft 312C of the central work section 3C to the rotating shaft 312L of the left work section 3L and the rotating shaft 312R of the right work section 3R. Conversely, when the left work section 3L and the right work section 3R are in the open (unfolded) state, the clutch CL is engaged, and power is transmitted from the rotating shaft 312C of the central work section 3C to the rotating shaft 312L of the left work section 3L and the rotating shaft 312R of the right work section 3R.
[0017] In this embodiment 1, the chain case 23 is positioned on the left side of the left support section, and power is transmitted from the gearbox 21 to the work section 3 via the power transmission shaft in the left support frame 22L and the chain in the chain case 23. However, the power transmission shaft may be positioned in the right support frame 22R, and the chain case 23 may be positioned on the right side of the right support section, and power may be transmitted from the gearbox 21 to the work section 3 via the power transmission shaft in the right support frame 22R and the chain in the chain case 23. Furthermore, the power transmission from the power transmission shaft to the rotation shaft of the work rotor 31 is not limited to a chain; other known transmission means such as belts and gears may also be used.
[0018] [Working Department] As described above, the work section 3 is divided into three parts: the central work section 3C, the left work section 3L, and the right work section 3R. The central work section 3C is connected to the three-point linkage mechanism of the vehicle body via the mounting section 1. The work section 3 is configured such that the left work section 3L and the right work section 3R can be opened and closed relative to the central work section 3C, either folded upward (closed) or extended to the side (open). The central working section 3C has a central working rotor 31C equipped with a rotating shaft 312C to which working claws 311 are attached. The front and top of the central working rotor 31C are covered by a central shield cover 32C, the left side by a left support, the right side by a right support, and the rear by a central apron 35C. The left work section 3L has a left work rotor 31L equipped with a rotating shaft 312L to which work claws 311 are attached. The front and top of the left work rotor 31L are covered by a left shield cover 32L, the left side by a left plate 33L, the right side by a right support, and the rear by a left apron 35L. The right work section 3R has a right work rotor 31R equipped with a rotating shaft 312R to which work claws 311 are attached. The front and top of the right work rotor 31R are covered by a right shield cover 32R, the left side by a left support section, the right side by a right plate 33R, and the rear by a right apron 35R.
[0019] The working rotor 31 is provided in the central working section 3C, the left working section 3L, and the right working section 3R, and has working claws 311 for tilling the rice paddies, and rotating shafts 312C, 312L, and 312R to which the working claws 311 are fixed. The rotating shaft 312C of the central working section 3C is supported by the left support and the right support of the central working section 3C. The rotating shaft 312L of the left work section 3L is supported by the left plate 33L and the right support part of the left work section 3L, and the rotating shaft 312R of the right work section 3R is supported by the right plate 33R and the left support part of the right work section 3R. The working rotor 31 receives power from the power input shaft 211, which is transmitted to the rotating shafts 312C, 312L, and 312R. This power causes the rotating shafts 312C, 312L, and 312R to rotate, and as the rotating shafts 312C, 312L, and 312R rotate, the working claws 311 rotate, thereby performing the puddling operation. In this embodiment 1, the working rotor 31 rotates counterclockwise when viewed from the left side.
[0020] The central apron 35C, left apron 35L, and right apron 35R are pivotally supported at the rear ends of the central shield cover 32C, left shield cover 32L, and right shield cover 32R so as to be able to rotate vertically. The left apron 35L and the right apron 35R are configured to connect to the central apron 35C when the left work section 3L and the right work section 3R are open, respectively. The apron, located behind the working rotor 31, presses against the mud surface, thereby contributing to the pulverization of the field soil, leveling of the field surface, and the incorporation of straw and other materials into the field soil. The left apron 35L and the right apron 35R are each fitted with a left apron pressurizing device 4L and a right apron pressurizing device 4R, respectively, between them and the left shield cover 32L and the right shield cover 32R, respectively, which pressurize the aprons downward. As described above, the central apron 35C is configured to connect with the left apron 35L and the right apron 35R when the left work section 3L and the right work section 3R are open. Therefore, when the left apron pressurizing device 4L and the right apron pressurizing device 4R pressurize the left apron 35L and the right apron 35R, the central apron 35C is also pressurized. Furthermore, the apron pressurizing device is not limited to being interposed between the left shield cover 32L and the left apron 35L, or between the right shield cover 32R and the right apron 35R, but may also be interposed between the central shield cover 32C and the central apron 35C, or it may be interposed only between the central shield cover 32C and the central apron 35C.
[0021] The lower ends of the central apron 35C, left apron 35L, and right apron 35R are respectively supported by central levelers 36C, left leveler 36L, and right leveler 36R, which are rotatable in the vertical direction. The left leveler 36L and right leveler 36R are configured to connect to the central leveler 36C when the left work section 3L and right work section 3R are in the open position, respectively. The central leveler 36C, left leveler 36L, and right leveler 36R are located behind the working rotor 31 and press against the mud surface, thereby performing actions such as crushing the soil in the field, leveling the field surface, and incorporating straw and other materials into the field soil.
[0022] The left end of the left leveler 36L and the right end of the right leveler 36R are rotatably supported by the left extension leveler 37L and the right extension leveler 37R, respectively, and can be opened and closed outwards to the left and right, respectively. The left extension leveler 37L and the right extension leveler 37R are used to pull soil and mud from the side of the work area 3 inwards and to level the soil on the side of the work area 3. The left extension leveler 37L and the right extension leveler 37R are configured to open and close independently using a motor (not shown) and a wire W (see Figure 2), respectively, and this opening and closing can be operated by a remote control 9, which will be described later. Specifically, the left extension leveler 37L and the right extension leveler 37R are opened and closed by rotating a wire arm to which the wire W is connected using a motor. In Figures 1-4, the left extension leveler 37L and the right extension leveler 37R are in the open position. Also, in Figures 5-7, where the left work section 3L and the right work section 3R are shown in the closed position, the left extension leveler 37L and the right extension leveler 37R are in the closed position, although they are not shown in the illustrations.
[0023] In this embodiment 1, the apron of harrow A (center apron 35C, left apron 35L, right apron 35R) is equipped with a rake 38. The rake 38 is located behind the working rotor 31 and, in addition to the action of the apron, further performs actions such as crushing the soil in the field and incorporating straw and other materials into the soil. The mounting structure of the rake 38 to the apron is the same for the center apron 35C, left apron 35L, and right apron 35R, so here we will describe the mounting structure of the left apron 35L. Figure 9 is a diagram illustrating a rake 38 attached to the inner surface of the left apron 35L of the left work section 3L of the harrow A in Embodiment 1 of the present invention, and shows the left apron 35L viewed from the rear and a cross-sectional view along line NN. A pivot shaft 35L1 is attached to the upper end of the left apron 35L, which rotatably supports the left apron 35L to the rear end of the left shield cover 32L. A rake mounting frame 35L2 is also fixed to the left apron 35L below the pivot shaft 35L1.
[0024] The rake mounting frame 35L2 is a member bent into a roughly L-shape, extending in the left-right direction. The rake mounting frame 35L2 has a fixing portion that extends forward, with its rear end fixed to the apron body portion 35La of the left apron 35L, and its left and right ends fixed to the left and right side plate portions 35Lb of the left apron 35L, respectively, and a rake mounting portion that extends downward from the front end of the fixing portion, with its left and right ends fixed to the left and right side plate portions 35Lb of the left apron 35L, respectively, and to which the rake 38 is detachably attached by the rake mounting member 35L3, which will be described later. The rake 38 is detachably attached to the rake mounting portion of the rake mounting frame 35L2 by the rake mounting member 35L3. Since the rake mounting frame 35L2 is configured in a roughly L-shape, as shown in Figure 9, when the rake mounting frame 35L2 is fixed to the left apron 35L, the lower part of the rake mounting frame 35L2 (the side supporting the left leveler 36L) is open. This makes it difficult for soil to accumulate inside the rake mounting frame 35L2, and even if soil does accumulate inside the rake mounting frame 35L2, it is easy for the worker to remove the accumulated soil. In this embodiment 1, the rakes 38 are attached at equal intervals at nine locations in the left-right direction of the rake mounting frame 35L2 (rake mounting section), but the number of rakes 38 and the attachment intervals can be changed as appropriate in the design.
[0025] The rake 38 is a so-called spring rake, and is formed in a shape in which two symmetrical rod portions 381 are paired together and connected at their base ends, i.e., upper ends, by a roughly U-shaped connecting portion 382. The connecting portion 382 is bent to the rear, i.e., in a roughly L-shape when viewed from the side, approximately perpendicular to the plane formed by the two rod portions 381, and toward the rear. When the rake 38 is attached to the rake mounting frame 35L2, the connecting portion 382 is shaped to conform to the fixing portion of the rake mounting frame 35L2. A coil spring portion 383 is formed at the base end of the rod portion 381. The coil spring portion 383 is formed such that its axis is parallel to the rotation axis 312L. The rake 38 is attached to the rake mounting frame 35L2 (rake mounting section) by sandwiching the coil spring section 383 and the connecting section 382 between the rake mounting frame 35L2 and the rake mounting member 35L3, and fastening the rake mounting frame 35L2 and the rake mounting member 35L3 with bolts and nuts.
[0026] The soil cover plate 7 can be attached to a bracket fixed to the front end of the central shield cover 32C. The soil cover plate 7 is installed behind the tires of the vehicle and fills in the grooves left by the tire tracks of the vehicle. Furthermore, when not in use, the soil cover plate 7 is removed from the bracket fixed to the front end of the central shield cover 32C and attached to the soil cover storage bracket provided on the central shield cover 32C.
[0027] [Opening and closing of the left work section 3L and the right work section 3R] The central shield cover 32C and the left shield cover 32L are connected by a left-rotating support part 34L, and the central shield cover 32C and the right shield cover 32R are connected by a right-rotating support part 34R. The left rotation support section 34L comprises a central work section 3C side member, a left work section 3L side member, a left rotation shaft 34L1, and a left cylinder support arm 34L2. The central work section 3C side member is fixed to the central shield cover 32C of the central work section 3C. The left work section 3L side member has a pin that can slide through a sliding hole provided in the left cylinder support arm 34L2 (described later), and is fixed to the left shield cover 32L of the left work section 3L. The left rotation shaft 34L1 is a member that connects the central work section 3C side member and the left work section 3L side member, and rotatably supports the left work section 3L side member with respect to the central work section 3C side member. The left rotation shaft 34L1 also rotatably supports the left cylinder support arm 34L2 with respect to the central work section 3C side member. The left cylinder support arm 34L2 has a sliding hole through which a pin provided on the left work section 3L side member slides, and one end of the left work section opening / closing cylinder 24L (described later) is rotatably attached. The left cylinder support arm 34L2 is also rotatably supported on the left pivot shaft 34L1. The left cylinder support arm 34L2 rotates on the left pivot shaft 34L1 as the left work section opening / closing cylinder 24L extends and retracts. When the left work section opening / closing cylinder 24L extends and retracts, the left cylinder support arm 34L2 rotates on the left pivot shaft 34L1 as the pivot shaft. As the left cylinder support arm 34L2 rotates, the pin provided on the left work section 3L side member slides through the sliding hole of the left cylinder support arm 34L2. As a pin provided on the left work section 3L side member slides through the sliding hole of the left cylinder support arm 34L2, the left work section 3L side member rotates relative to the central work section 3C side member, with the left pivot axis 34L1 as the pivot axis. In other words, when the left work section opening / closing cylinder 24L extends or retracts, the left work section 3L rotates relative to the central work section 3C, with the left pivot axis 34L1 as the pivot axis.
[0028] The right rotation support section 34R comprises a central work section 3C side member, a right work section 3R side member, a right rotation shaft 34R1, and a right cylinder support arm 34R2. The central work section 3C side member is fixed to the central shield cover 32C of the central work section 3C. The right work section 3R side member has a pin that can slide through a sliding hole provided in the right cylinder support arm 34R2 (described later), and is fixed to the right shield cover 32R of the right work section 3R. The right rotation shaft 34R1 is a member that connects the central work section 3C side member and the right work section 3R side member, and rotatably supports the right work section 3R side member with respect to the central work section 3C side member. The right rotation shaft 34R1 also rotatably supports the right cylinder support arm 34R2 with respect to the central work section 3C side member. The left cylinder support arm 34L2 has a sliding hole through which a pin provided on the right work section 3R side member slides, and one end of the right work section opening / closing cylinder 24R, described later, is rotatably attached. The right cylinder support arm 34R2 is rotatably supported on the right rotation axis 34R1. The right cylinder support arm 34R2 rotates on the right rotation axis 34R1 as the right work section opening / closing cylinder 24R extends and retracts. When the right work section opening / closing cylinder 24R extends and retracts, the right cylinder support arm 34R2 rotates on the right rotation axis 34R1. As the right cylinder support arm 34R2 rotates, the pin provided on the right work section 3R side member slides through the sliding hole of the right cylinder support arm 34R2. As a pin provided on the right work section 3R side member slides through the sliding hole of the right cylinder support arm 34R2, the right work section 3R side member rotates relative to the central work section 3C side member, with the right rotation axis 34R1 as the axis of rotation. In other words, when the right work section opening / closing cylinder 24R extends or retracts, the right work section 3R rotates relative to the central work section 3C, with the right rotation axis 34R1 as the axis of rotation.
[0029] As described above, the left work section 3L and the right work section 3R are rotatably supported relative to the central work section 3C by a left pivot shaft 34L1 and a right pivot shaft 34R1, respectively, and are configured to be openable and closable. In this embodiment, the opening and closing of the left work section 3L and the right work section 3R relative to the central work section 3C is performed by the user using the remote control 9. Furthermore, a left work section opening / closing cylinder 24L and a right work section opening / closing cylinder 24R are interposed between the left support frame 22L and the left work section 3L side member of the left rotation support section 34L, and between the right support frame 22R and the right work section 3R side member of the right rotation support section 34R, respectively. The left work section opening / closing cylinder 24L and the right work section opening / closing cylinder 24R are actuators for vertically rotating the left work section 3L and the right work section 3R with respect to the central work section 3C. The left work section opening / closing cylinder 24L and the right work section opening / closing cylinder 24R are each configured to be independently drivable, allowing the left work section 3L and the right work section 3R to be opened and closed independently.
[0030] The left work section opening / closing cylinder 24L has one end rotatably attached to the left cylinder support arm 34L2. Furthermore, the other end of the left work section opening / closing cylinder 24L is rotatably attached to the left cylinder mounting bracket 22L3, which is fixed to the left support frame 22L. Furthermore, the right work section opening / closing cylinder 24R is rotatably mounted at one end to the right cylinder support arm 34R2 and at the other end to the right cylinder mounting bracket 22R3, similar to the left work section opening / closing cylinder 24L. In this embodiment 1, the left work section opening / closing cylinder 24L and the right work section opening / closing cylinder 24R are electrically operated hydraulic cylinders, but are not limited to these, and may be other actuators such as hydraulic cylinders or electric cylinders.
[0031] Two gas springs 25L for opening and closing the left work section and two gas springs 25R for opening and closing the right work section are interposed between the left support frame 22L and the left shield cover 32L, and between the right support frame 22R and the right shield cover 32R, respectively. Note that there may be one gas spring or three or more gas springs, not just two. In other words, the number of gas springs can be changed as appropriate according to the expansion and contraction force of the gas springs. The 25L gas spring for opening and closing the left work section will be explained in detail. The ends of the two left work section opening / closing gas springs 25L on the left shield cover 32L side are attached to the left work section side mounting bracket 32L1, which is provided on the left shield cover 32L, via pins 32L11, and are rotatably supported with the pins 32L11 as the pivot point. The left work section side mounting bracket 32L1 is provided on the central work section 3C side of the left work section 3L, and an insertion hole for inserting the pins 32L11 is provided on its upper side. The end of the left work section opening / closing gas spring 25L on the central shield cover 32C side is also attached to the central work section side mounting bracket 22L1, which is attached to the left support frame 22L, via a pin 22L16, and is rotatably supported with the pin 22L16 as the pivot point. By supporting the left work section opening / closing gas spring 25L on the highly rigid left support frame 22L, the left work section opening / closing gas spring 25L can be firmly supported.
[0032] The central work section mounting bracket 22L1 is attached to the left end of the left support frame 22L and has a support portion 22L11 that extends radially outward from the left support frame 22L, specifically upward and rearward, a connecting support portion 22L12 fixed to the upper end of the support portion 22L11 and projecting outward to the left, and a spring connecting portion 22L13 that is rotatably supported at the end of the connecting support portion 22L12 by a pin 22L14. The support portion 22L11 is positioned adjacent to the chain case 23 on its right side (gearbox 21 side), approximately parallel to the chain case 23, and is formed to protrude above and behind the chain case 23. The connecting support portion 22L12 is formed in a roughly U-shape (having two opposing sides and an upper surface connecting the upper ends of the two sides), with an opening located on the support portion 22L11 side and fixed to the upper end of the support portion 22L11 by welding. The left end of the connecting support portion 22L12 is positioned to overlap a portion of the upper part of the chain case 23. In addition, pin holes for inserting the pin 22L14 are formed on the two sides of the left end of the connecting support portion 22L12.
[0033] The spring connecting portion 22L13 is formed in a roughly U-shape (having two opposing sides and an upper surface connecting the upper ends of the two sides), and is installed on top of the connecting support portion 22L12, which is also formed in a roughly U-shape, so as to nest and cover it (the inner surface of the upper surface of the spring connecting portion 22L13 abuts against the upper surface of the connecting support portion 22L12), and is fixed by a bolt 22L15. A pin hole for inserting a pin 22L14 is formed near the center in the left-right direction of the spring connecting portion 22L13, and the connecting support portion 22L12 and the spring connecting portion 22L13 are rotatably connected by the pin 22L14. On the two sides of the left end of the spring connecting portion 22L13, pin holes are formed through which pins 22L16, which rotatably connect the two left work section opening / closing gas springs 25L, are inserted. Since the pin 22L14, which is the pivot point for both the connecting support portion 22L12 and the spring connecting portion 22L13, is located near the left end of the connecting support portion 22L12 and near the left-right center of the spring connecting portion 22L13, when the inner surface of the upper surface of the spring connecting portion 22L13 is in contact with the upper surface of the connecting support portion 22L12, the left end can only rotate downward (towards the chain case 23). Pin 22L16 is positioned above and behind the chain case 23, so as to overlap the chain case 23 when viewed in the front-to-back direction or from above, i.e., in the left-to-right direction.
[0034] The axis S1 of the pin 22L16, which is the pivot axis at the end of the left work section opening / closing gas spring 25L on the central work section 3C side, and the axis S2 of the left pivot axis 34L1, which is the pivot axis of the left work section 3L, are arranged in parallel or approximately parallel. The axes S1 and S2 coincide or approximately coincide in the left-right direction (viewed in the front-back direction) (see the upper right enlarged view in Figure 2), and are slightly separated in the height direction (up-down direction; viewed from the side) (see the lower right enlarged view in Figure 7). Furthermore, both the pin 22L16 and the left pivot axis 34L1 are arranged in a forward-high, rear-low position, that is, they are inclined so that they become lower as they move towards the rear. In other words, the axis S1 of the pin 22L16 is located near the axis S2 of the left pivot axis 34L1. Furthermore, at least a portion of the pin 22L16 and the left pivot shaft 34L1 overlap in an axial view (when viewed from the direction of extension of axis S1 or axis S2). As described above, by arranging the pin 22L16 and the left pivot shaft 34L1 in close proximity, the force of the left work section opening / closing gas spring 25L can be efficiently transmitted to the left work section 3L. Note that the axes S1 and S2 are not limited to being slightly separated in the height direction (up and down direction; side view), but may be configured to coincide or approximately coincide in the height direction as well as in the left and right direction. In order to efficiently transmit the force of the left work section opening / closing gas spring 25L to the left work section 3L, it is preferable that they coincide or approximately coincide in the height direction as well.
[0035] This section describes the procedure for attaching the left work section opening / closing gas spring 25L to the central work section mounting bracket 22L1. First, one end of the left work section opening / closing gas spring 25L is attached to the left work section mounting bracket 32L11 using the pin 32L11. Next, the other end of the left work section opening / closing gas spring 25L is attached to the central work section mounting bracket 22L1 (spring connection part 22L13) using the pin 22L16. At this time, the bolt 22L15 is removed, and the spring connection part 22L13 is in a state where it can rotate relative to the connecting support part 22L12. The left work section opening / closing gas spring 25L is easier to install when attached to the rotatable spring connection part 22L13 than when attached to the fixed spring connection part 22L13. If the connecting support part 22L12 and the spring connection part 22L13 are fixed together, or if the connecting support part 22L12 and the spring connection part 22L13 are a single unit, the left work section opening / closing gas spring 25L must be compressed under load before being attached to the spring connection part 22L13.
[0036] On the other hand, in the case where the spring connecting portion 22L13 is rotatable relative to the connecting support portion 22L12, as in this embodiment 1, the left end of the spring connecting portion 22L13 can be positioned lower compared to the case where the connecting support portion 22L12 and the spring connecting portion 22L13 are fixed. Therefore, the gas spring 25L can be attached to the spring connecting portion 22L13 in its natural length (or close to its natural length). Consequently, the left work section opening / closing gas spring 25L can be attached to the spring connecting portion 22L13 without applying any load to the left work section opening / closing gas spring 25L, thereby improving work efficiency when attaching the left work section opening / closing gas spring 25L. Finally, the connecting support part 22L12 and the spring connecting part 22L13 (upper surface) are fixed with bolt 22L15. In this way, the left work section opening / closing gas spring 25L is connected to the spring connecting part 22L13 with a pin 22L16, and then the connecting support part 22L12 and the spring connecting part 22L13 are fixed with a bolt 22L15, thereby allowing the left work section opening / closing gas spring 25L to be adjusted to a predetermined length. That is, the left work section opening / closing gas spring 25L is installed in a contracted state (a state in which a compressive force is acting in the direction of extension).
[0037] The left work section opening / closing gas spring 25L is installed so that it is in a contracted state (a pressing force acting in the direction of extension) when the left work section 3L is in the open and closed states. When the left work section 3L is driven from the closed state to the open state by the left work section opening / closing cylinder 24L, in the initial stages of the drive, the left work section opening / closing gas spring 25L extends (applies a pressing force) and presses the left work section 3L in the same direction as the left work section opening / closing cylinder 24L, assisting the driving force of the left work section opening / closing cylinder 24L. When the left work section 3L has rotated by a predetermined amount, the left work section opening / closing gas spring 25L returns to its natural length, and no longer assists in driving the left work section 3L in the opening direction. As the left work section 3L rotates further, the left work section opening / closing gas spring 25L extends. At this point, the left work section 3L is slightly open to the outside of the central work section 3C, and the left work section 3L tries to rotate in the opening direction due to its own weight. The force exerted by the weight of the left work section 3L, which tends to rotate it in the opening direction, is applied to the left work section opening / closing cylinder 24L. The extended left work section opening / closing gas spring 25L pulls the left work section 3L towards the closed position, supporting a portion of the weight of the left work section 3L. In this embodiment, the left work section opening / closing gas spring 25L is most extended when the left work section 3L is opened by approximately 45°. After this, the left work section 3L rotates towards the open position as the left work section opening / closing gas spring 25L contracts. As the left work section opening / closing gas spring 25L contracts, it exerts a pressing force (elastic force) that pushes the left work section 3L towards the closing direction, thus mitigating the impact when the left work section 3L stops in the open position. When the left work section 3L is in the open position, the left work section opening / closing gas spring 25L is in a contracted state. The tensile and compressive (elastic) forces of the left work section opening / closing gas spring 25L act as a brake on the opening direction of the left work section 3L, mitigating the impact when the left work section 3L stops in the open position.
[0038] Conversely, when the left work section 3L is driven from the open position to the closed position by the left work section opening / closing cylinder 24L, in the initial stages of the drive, the left work section opening / closing gas spring 25L extends while pressing the left work section 3L in the same direction as the left work section opening / closing cylinder 24L's closing direction, assisting the driving force of the left work section opening / closing cylinder 24L. When the left work section 3L rotates by a predetermined amount, the left work section opening / closing gas spring 25L returns to its natural length, and no longer assists in driving the left work section 3L in the closing direction. Furthermore, as the left work section 3L rotates further, the left work section opening / closing gas spring 25L extends. The force of the left work section 3L's own weight trying to rotate it in the open direction is applied to the left work section opening / closing cylinder 24L. The extended left work section opening / closing gas spring 25L pulls the left work section 3L toward the closed position, supporting a portion of the left work section 3L's own weight. When the left work section 3L is opened to approximately 45°, the left work section opening / closing gas spring 25L is in its most extended state. After this, as the left work section opening / closing gas spring 25L contracts, the left work section 3L rotates towards the closed position. When the left work section 3L has rotated by a predetermined amount, the left work section opening / closing gas spring 25L returns to its natural length. At this point, the left work section 3L is slightly closed inward toward the central work section 3C, and the left work section 3L attempts to rotate in the closed direction due to its own weight. This force of the left work section 3L attempting to rotate in the open direction due to its own weight is applied to the left work section opening / closing cylinder 24L. The contracted left work section opening / closing gas spring 25L exerts a pressing force that pushes the left work section 3L toward the open position, supporting a portion of the left work section 3L's own weight. After this, as the left work section opening / closing gas spring 25L contracts, the left work section 3L rotates towards the closed position. As the left work section opening / closing gas spring 25L contracts, it exerts a pressing force (elastic force) that pushes the left work section 3L in the opening direction, thereby mitigating the impact when the left work section 3L stops in the closed position. When the left work section 3L is in the closed position, the left work section opening / closing gas spring 25L is in a contracted state. The tensile and pressing forces of this left work section opening / closing gas spring 25L act as a brake on the drive of the left work section 3L in the closing direction, mitigating the impact when the left work section 3L stops in the closed position.
[0039] In other words, the left work section opening / closing gas spring 25L assists the drive in the opening direction during the initial rotation of the left work section 3L, and brakes the rotation in the opening direction during the final rotation. Conversely, when the left work section 3L rotates in the closing direction, it assists the drive in the closing direction during the initial rotation, and brakes the rotation in the closing direction during the final rotation. In this way, the elastic force of the left work section opening / closing gas spring 25L assists and brakes the drive of the left work section opening / closing cylinder 24L, resulting in smooth opening and closing of the left work section 3L.
[0040] The left work section opening / closing gas spring 25L does not protrude forward (or hardly protrudes at all) from the central shield cover 32C, left shield cover 32L, and right shield cover 32R when the left work section 3L is in the open and closed positions, as viewed from the side. Furthermore, the left work section opening / closing gas spring 25L is positioned behind (towards work section 3) the line S3 connecting the top mast 11 of the mounting section 1 and the front end of the left shield cover 32L of the left work section 3L when the left work section 3L is in the open position, as viewed from the side. This arrangement ensures that the left work section opening / closing gas spring 25L does not protrude forward of the line connecting the top mast 11 of the mounting section 1 and the left shield cover 32L of the left work section 3L, as viewed from the side, that is, it does not protrude outward from the approximate body portion of the halo A.
[0041] Furthermore, the left work section opening / closing gas spring 25L is positioned behind the line connecting the central shield cover 32C of the central work section 3C and the left shield cover 32L of the left work section 3L when the left work section 3L is in the closed state, in a side view. Specifically, when the left work section 3L is in the closed state, the left work section opening / closing gas spring 25L is positioned behind the line S4 connecting the front ends of the members that connect the central shield cover 32C of the central work section 3C and the left shield cover 32L of the left work section 3L, respectively. In addition, when the left work section 3L is in the closed state, the line connecting the central shield cover 32C of the central work section 3C and the left shield cover 32L of the left work section 3L in a side view is not limited to line S4 connecting the front ends of the members that connect the central shield cover 32C of the central work section 3C and the left shield cover 32L of the left work section 3L, respectively, when the left work section 3L is in the closed state. It may also be a line connecting the front end of the central shield cover 32C of the central work section 3C and the front end of the left shield cover 32L of the left work section 3L in a side view when the left work section 3L is in the closed state (the front end of the left shield cover 32L of the left work section 3L when the left work section 3L is in the open state). This arrangement ensures that the left work section opening / closing gas spring 25L does not protrude forward from the line connecting the front ends of the members that connect the central shield cover 32C of the central work section 3C and the left shield cover 32L of the left work section 3L, respectively, when viewed from the side, i.e., it does not protrude outward from the approximate body portion of the halo A. If the gas spring protrudes significantly outward from the machine body, it may break by hitting other objects or by being grasped by an operator. However, the above-described arrangement can prevent such damage.
[0042] The right work section opening / closing gas spring 25R is configured similarly to the left work section opening / closing gas spring 25L, as described below, and can achieve the same effects. The ends of the two right work section opening / closing gas springs 25R on the right shield cover 32R side are attached to the right work section mounting bracket 32R1, which is provided on the right shield cover 32R, via pins 32R11, and are rotatably supported with the pins 32R11 as the pivot point. The right work section mounting bracket 32R1 is provided on the central work section 3C side of the right work section 3R, and an insertion hole for inserting the pins 32R11 is provided on its upper side. The end of the right work section opening / closing gas spring 25R on the central shield cover 32C side is also attached to the central work section side mounting bracket 22R1, which is attached to the right support frame 22R, via a pin 22R16, and is rotatably supported with the pin 22R16 as the pivot point. By supporting the right work section opening / closing gas spring 25R on the highly rigid right support frame 22R, the right work section opening / closing gas spring 25R can be firmly supported.
[0043] The central work section mounting bracket 22R1 is attached to the right end of the right support frame 22R and has a support portion 22R11 that extends radially outward from the right support frame 22R, specifically upward and rearward, a connecting support portion 22R12 fixed to the upper end of the support portion 22R11 and projecting outward to the right, and a spring connecting portion 22R13 rotatably supported at the end of the connecting support portion 22R12 by a pin 22R14. The support portion 22R11 is positioned adjacent to the right support portion of the central working portion 3C, on the left side (gearbox 21 side), so as to be approximately parallel to the right support portion of the central working portion 3C, and is formed to a length that protrudes above and behind the right support portion of the central working portion 3C. The connecting support portion 22R12 is formed in a roughly U-shape (having two opposing sides and an upper surface connecting the upper ends of the two sides), with an opening located on the support portion 22R11 side and fixed to the upper end of the support portion 22R11 by welding. The right end of the connecting support portion 22R12 is positioned to overlap a portion of the upper part of the right support portion of the central work portion 3C. In addition, pin holes for inserting the pin 22R14 are formed on the two sides of the right end of the connecting support portion 22R12.
[0044] The spring connecting portion 22R13 is formed in a roughly U-shape (having two opposing sides and an upper surface connecting the upper ends of the two sides), and is installed on top of the connecting support portion 22R12, which is also formed in a roughly U-shape, so as to nest and cover it (the inner surface of the upper surface of the spring connecting portion 22R13 abuts against the upper surface of the connecting support portion 22R12), and is fixed by a bolt 22R15. A pin hole for inserting a pin 22R14 is formed near the center in the left-right direction of the spring connecting portion 22R13, and the connecting support portion 22R12 and the spring connecting portion 22R13 are rotatably connected by the pin 22R14. On the two sides of the right end of the spring connecting portion 22R13, pin holes are formed through which a pin 22R16, which rotatably connects the right working portion opening / closing gas spring 25R, is inserted. Since the pin 22R14, which is the pivot point for both the connecting support portion 22L12 and the spring connecting portion 22L13, is positioned near the right end of the connecting support portion 22R12 and near the left-right center of the spring connecting portion 22R13, when the inner side of the upper surface of the spring connecting portion 22R13 is in contact with the upper surface of the connecting support portion 22R12, the right end can only rotate downwards.
[0045] The axis of the pin 22R16, which is the pivot axis at the end of the right work section opening / closing gas spring 25R on the central work section 3C side, and the axis of the right pivot shaft 34R1, which is the pivot axis of the right work section 3R, are arranged parallel or nearly parallel, similar to the axis S1 of the pin 22L16, which is the pivot axis at the end of the left work section opening / closing gas spring 25L on the central work section 3C side, and the axis S2 of the left pivot shaft 34L1, which is the pivot axis of the left work section 3L. They coincide or nearly coincide in the left-right direction (viewed in the front-back direction) and are slightly separated in the height direction (up-down direction; viewed from the side). Furthermore, both the pin 22R16 and the right pivot shaft 34R1 are arranged in a forward-high, rear-low posture, that is, they are inclined so that they become lower as they move towards the rear. In other words, the axis of the pin 22R16 is located near the axis of the right pivot shaft 34R1. Furthermore, pin 22R16 and the right-hand pivot shaft 34R1 overlap at least partially when viewed axially. As described above, by arranging the pin 22R16 and the right pivot shaft 34R1 in close proximity, the force of the right work section opening / closing gas spring 25R can be efficiently transmitted to the right work section 3R. Note that the axis of the pin 22R16 and the axis of the right pivot shaft 34R1 are not limited to being slightly separated in the height direction (up and down direction; side view), but may also be aligned or nearly aligned in the height direction, similar to the left and right direction. In order to efficiently transmit the force of the right work section opening / closing gas spring 25R to the right work section 3R, it is preferable that they also align or nearly align in the height direction.
[0046] [Remote control means] Figure 10 is a six-view drawing showing the remote control 9 used in the Hello A of Embodiment 1 of the present invention. As described above, the opening and closing of the left work section 3L and the right work section 3R, and the opening and closing of the left extension leveler 37L and the right extension leveler 37R can be operated by the remote control 9, which is a remote control means. The remote control 9 has a roughly rectangular parallelepiped shape, with one of its widest surfaces serving as the operation and display surface, on which multiple push buttons as operation means and indicator lamps as display means are arranged. The remote control 9 has two parallel grooves 98 extending horizontally (short side) on the upper side of the back of the operation / display surface, above the center in the vertical direction (long side). The grooves 98 are shaped to make it easy for the operator to operate the remote control 9 by hooking their fingers into the grooves 98. For example, when pressing a button located above the remote control 9, such as the power button 91 described later, the operator can hook their index finger into the upper groove 98 to hold the remote control 9 while pressing the button with their thumb. Similarly, when pressing a button located below the remote control 9, such as the pressure button 96 or soil-gathering button 97 described later, the operator can hook their index finger into the lower groove 98 to hold the remote control 9 while pressing the button with their thumb. In this way, the operator can stably hold the remote control 9 by hooking their fingers into the grooves 98 when operating the remote control, enabling reliable operation.
[0047] (1) Power supply A power button 91 is provided to turn the power on and off. Additionally, a power indicator lamp 91a is provided to show whether the power is on or off, and a charging indicator lamp 91b is provided to show the charging status of the remote control 9's battery. Press and hold the power button 91 to turn the power on and off. The power indicator light illuminates when the power is on and turns off when the power is off. Additionally, the charging indicator light 91b blinks when the battery level falls below a certain value, stays lit while charging, and turns off when charging is complete.
[0048] (2) Opening and closing of work equipment Three buttons are provided: a left / right selection button 92 for selecting either the left work section 3L or the right work section 3R; an open button 93 for unfolding the selected left work section 3L or right work section 3R to the open position; and a close button 94 for folding the selected left work section 3L or right work section 3R to the closed position. In addition, there are four indicator lights of two types: a left / right selection lamp 92a that displays the selected item using the left / right selection button 92, and an open lamp 93a that displays the item being opened using the open button 93. When the left / right selection button 92 is pressed, the left work section 3L is selected first. Then, when the left / right selection button 92 is pressed again, the right work section 3R is selected. Subsequently, each time the left / right selection button 92 is pressed, the left work section 3L and the right work section 3R are selected alternately. In addition, the left / right selection lamp 92a on the selected side lights up. After selecting with the left / right selection button 92, pressing the open button 93 will unfold the selected left work section 3L or right work section 3R. During the unfolding operation, the open lamp 93a on the unfolded side will light up. When the left work section 3L and / or the right work section 3R are extended, pressing the close button 94 causes the extended (open) left work section 3L and / or the right work section 3R to fold into the closed position. When the left / right selection button 92, the open button 93, or the close button 94 of the remote control 9 is operated, an operation signal is transmitted to the agricultural machine control means provided on the halo A, and the agricultural machine control means controls the driving of the left work section opening / closing cylinder 24L and the right work section opening / closing cylinder 24R based on the received operation signal.
[0049] (3) Extension leveler opening and closing Two buttons are provided to open and close the extension levelers: the left extension leveler open / close button 95L, which opens and closes the left extension leveler 37L, and the right extension leveler open / close button 95R, which opens and closes the right extension leveler 37R. Additionally, there are two indicator lamps: a left extension leveler open / close indicator lamp 95La that shows when the left extension leveler 37L is being opened or closed by the left extension leveler open / close button 95L, and a right extension leveler open / close indicator lamp 95Ra that shows when the right extension leveler 37R is being opened or closed by the right extension leveler open / close button 95R. When the left extension leveler open / close button 95L is pressed, the left extension leveler 37L, which is in the closed position, unfolds and becomes open. Conversely, the left extension leveler 37L, which is in the open position, folds back into the closed position. In addition, the left extension leveler open / close indicator lamp 95La illuminates while the left extension leveler 37L is in the opening / closing operation. When the right extension leveler open / close button 95R is pressed, the closed right extension leveler 37R unfolds to the open position, and conversely, the open right extension leveler 37R folds back into the closed position. In addition, the right extension leveler open / close indicator lamp 95Ra lights up while the right extension leveler 37R is in the opening / closing operation. When the left extension leveler open / close button 95L or the right extension leveler open / close button 95R of the remote control 9 is operated, an operation signal is transmitted to the agricultural implement control means provided on the harrow A, and the agricultural implement control means controls the drive of the motor that operates the wire W based on the received operation signal.
[0050] (4) Apron pressurization A pressure button 96 is provided to turn the pressure on and off for the left apron 35L and the right apron 35R. Additionally, a pressure indicator lamp 96a is provided to show when the left apron 35L and the right apron 35R are pressurized. When the pressurizing button 96 is pressed, the left apron 35L and right apron 35R, which are currently in a pressure-off state, enter a pressure-on state, and conversely, the left apron 35L and right apron 35R, which are currently in a pressure-on state, enter a pressure-off state. Also, when the left apron 35L and right apron 35R enter a pressure-on state, the pressurizing indicator lamp 96a lights up, and when the left apron 35L and right apron 35R enter a pressure-off state, the pressurizing indicator lamp 96a turns off. When the pressure button 96 on the remote control 9 is operated, an operation signal is transmitted to the agricultural machine control means provided on the harrow A, and the agricultural machine control means controls the drive of the left apron pressurizing device 4L and the right apron pressurizing device 4R based on the received operation signal.
[0051] (5) Switching to soil mounding A soil-piling button 97 is provided to switch the central leveler 36C, left leveler 36L, and right leveler 36R to the soil-piling state. Additionally, there are soil-piling indicator lamps 97a that show when the central leveler 36C, left leveler 36L, and right leveler 36R are in a soil-piling state. When the soil-raising button 97 is pressed, the central leveler 36C, left leveler 36L, and right leveler 36R, which are in the soil-raising release state, enter the soil-raising state, and conversely, the central leveler 36C, left leveler 36L, and right leveler 36R, which are in the soil-raising state, enter the soil-raising release state. Also, when the central leveler 36C, left leveler 36L, and right leveler 36R enter the soil-raising state, the soil-raising indicator lamp 97a lights up, and when the central leveler 36C, left leveler 36L, and right leveler 36R enter the soil-raising release state, the soil-raising indicator lamp 97a turns off. When the soil-piling button 97 on the remote control 9 is operated, an operation signal is transmitted to the agricultural implement control means, and the agricultural implement control means controls the drive of the motors (not shown) so that the central leveler 36C, left leveler 36L, and right leveler 36R are in a soil-piling state based on the received operation signal.
[0052] [Embodiment 2] Figure 11 shows the halo A (open state) of Embodiment 2 of the present invention, and is a view of the halo A from the right side and a view from the front. Figure 12 shows the halo A (closed state) of Embodiment 2 of the present invention, and is a front view of halo A and a cross-sectional view along the line NN. This second embodiment differs from the first embodiment mainly in the opening and closing mechanisms of the left extension leveler 37L and the right extension leveler 37R. The following describes the opening and closing mechanisms for the left extension leveler 37L and the right extension leveler 37R. The left extension leveler 37L and the right extension leveler 37R are rotatably supported at the left end of the left leveler 36L and the right end of the right leveler 36R, respectively, as in Embodiment 1, and can be opened and closed outwards to the left and right. The left extension leveler 37L and the right extension leveler 37R are closed when the operator pulls the wire W, and opened when the operator manually rotates the left extension leveler 37L and the right extension leveler 37R. In Embodiment 1, the wire arm to which the wire W is connected is rotated by a motor via remote control operation by the operator to open and close the left extension leveler 37L and the right extension leveler 37R. However, Embodiment 2 differs in that the wire W, the left extension leveler 37L, and the right extension leveler 37R are operated manually by the operator. One end of the wire W is attached to the wire attachment part 37L1 of the left extension leveler 37L and the wire attachment part 37R1 of the right extension leveler 37R, and the other end is connected to a member that can unwind and wind up the wire W.
[0053] The wire W is routed using wire guides WG to prevent interference with other components of the halo A. In this embodiment 2, each wire W is guided by three wire guides WG. Note that one wire guide WG serves both wires W at the other end of each wire W. The number of wire guides WG can be arbitrarily set. This section provides a detailed explanation of the wire W and wire guide WG of the left extension leveler 37L. The wire guide WG is attached from one end of the wire W (the end on the left extension leveler 37L side) to the left plate 33L, the left shield cover 32L, and the top mast 11. The wire guide WG is formed by bending a single rod, with one end fixed to the left side plate 33L, the left shield cover 32L, and the top mast 11, and the other end being the point through which the wire W passes. The wire guide WG is formed by bending it at appropriate angles at appropriate points from one end, so that the other end is positioned to guide the wire W. The part of the other end through which the wire W passes is formed into a coil shape at the end of the rod material, and the wire W is guided by passing it along the axis of the coil.
[0054] In this embodiment 2, where the wire W is guided by the coiled portion at the other end, depending on the orientation of the tip of the coiled portion, the wire W may get caught on the tip of the coiled portion or caught between the wires of the coiled portion, which may result in the opening and closing of the left extension leveler 37L by the wire W becoming less smooth, or even making it impossible to open or close. Therefore, in this second embodiment, the tip of the coiled portion of the wire guide WG is oriented in a direction that prevents the wire W from getting caught. Let WG1 be the direction in which the base end of the coiled portion of the wire guide WG extends, and WG2 be the direction in which the tip end of the coiled portion of the wire guide WG extends (see enlarged views of Figures 11 and 12). When WG1 and WG2 are in the same direction or nearly the same direction (parallel or nearly parallel), the wire W is more likely to get caught on the tip of the coiled portion of the wire guide WG or between the wires of the coiled portion. Therefore, in this second embodiment, the direction WG1 in which the tip of the coiled portion of the wire guide WG extends is adjusted, and it is shaped so that WG1 and WG2 intersect. This shape makes it less likely for the wire W to get caught on the tip of the coiled portion of the wire guide WG or between the wires of the coiled portion.
[0055] Furthermore, the wire W and wire guide WG of the right extension leveler 37R are configured in the same way as the wire W and wire guide WG of the left extension leveler 37L, and can achieve the same effects. Furthermore, in this second embodiment, the portion through which the wire W passes is formed into a coil shape, but other configurations are also possible, such as forming it into a single circle, or attaching a member (for example, a link-shaped member) to the other end through which the wire W passes. Furthermore, the wire W of the left extension leveler 37L and the wire W of the right extension leveler 37R may be made of a single wire, and a member capable of unwinding and winding the aforementioned wire W may be provided for each of the wire W between the wire guide WG fixed to the top mast 11 and the wire guide WG fixed to the left shield cover 32L, and the wire W between the wire guide WG fixed to the top mast 11 and the wire guide WG fixed to the right shield cover 32R.
[0056] In Embodiment 1, the mowing plate 7 was attached to a bracket provided at the front end of the central shield cover 32C when in use, and to a mowing plate storage bracket provided on the central shield cover 32C when not in use. In Embodiment 2, however, the mowing plate 7 is attached to stand brackets provided at the front left and right ends of the central shield cover 32C when in use, and to mowing plate storage brackets 8 provided on the left support frame 22L and the right support frame 22R when not in use. The dozer plate 7 is installed behind the tires of the vehicle (at both ends of the central shield cover 32C in this embodiment 2) to fill in the grooves left by the tires of the vehicle. When in use, the dozer plate 7 is attached to stand brackets provided on the front left and right ends of the central shield cover 32C, and serves to erase tire tracks. When not in use, such as when the left work section 3L and the right work section 3R are closed, the dozer plate 7 is attached to the dozer plate storage brackets 8 installed on the left support frame 22L and the right support frame 22R, as described above, and stored in a position away from the ground, such as the work surface or road surface.
[0057] As described above, the halo A of Embodiments 1 and 2 according to the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to Embodiments 1 and 2, and any design changes, etc., that do not depart from the gist of the present invention are also included. Furthermore, Embodiments 1 and 2 described above can be combined by utilizing each other's technologies, as long as there are no particular contradictions or problems in their purpose and configuration. [Explanation of Symbols]
[0058] A Hello 1. Mounting part 11 Topmast 2 frames 21 Gearbox 211 Power input shaft 22 Support frame 22L Left Support Frame 22L1 Central work area side mounting bracket 22L11 Support part 22L12 Connection support part 22L13 Spring connection part 22L14 Pin 22L15 Bolt 22L16 Pin 22L2 Fixing Member 22L3 Left Cylinder Mounting Bracket 22La Through hole 22Lb opening 22Lc step 22R Right support frame 22R1 Central work area side mounting bracket 22R11 Support part 22R12 Connection support part 22R13 Spring connection part 22R14 Pin 22R15 Bolt 22R16 Pin 22R3 Right Cylinder Mounting Bracket 23 Chain Case 24L Left work section opening / closing cylinder 24R Right work section opening / closing cylinder 25L Left work section opening / closing gas spring 25R Right work section opening / closing gas spring 3. Work area 3C Central working section 3L Left work area 3R Right work area 31 Working rotor 31C Central Working Rotor 31L Left-hand working rotor 31R Right-hand working rotor 311 Working Claws 312C Rotating shaft 312L Rotating shaft 312R Rotation axis 32C Central Shield Cover 32L Left Shield Cover 32L1 Left work area mounting bracket 32L11 Pin 32R Right Shield Cover 32R1 Right work area mounting bracket 32R11 Pin 33L left side plate 33R Right side plate 34L Left-rotating support section 34L1 Left-hand pivot shaft 34L2 Left cylinder support arm 34R Right-hand rotation support section 34R1 Right-hand pivot shaft 34R2 Right cylinder support arm 35C Central Apron 35L Left apron 35La main body 35Lb side plate part 35L1 Rotary shaft 35L2 Rake Mounting Frame 35L3 Rake mounting component 35R Right Apron 36C Central Level 36L Left Leveler 36R Right Level 37L Left Extension Leveler 37L1 Wire attachment section 37R Right extension level 37R1 Wire attachment part 38 Rake 381 Rod section 382 Connecting part 383 Coil spring section 4L Left Apron Pressurizing Device 4R Right apron pressurizing device 7 Soil cover plate 8. Storage bracket for covering the earth plate 9 Remote control 91 Power button 91a Power lamp 91b Charging Indicator 92 Left / Right Select Buttons 92a Left / Right Selection Lamp 93 Open button 93a Open Lamp 94 Close button 95L Left extension leveler open / close button 95La Left extension leveler open / close indicator lamp 95R Right Extension Leveler Open / Close Button 95Ra Right Extension Leveler Open / Close Indicator Lamp 96 Pressure Button 96a Pressure indicator lamp 97 Soil-covered buttons 97a Soil mounding indicator lamp 98 Groove CL Clutch S1 axis center S2 axis center S3 Line W wire WG Wire Guide
Claims
1. A mounting section connected to the vehicle body, and a central working section having support frames extending to the left and right to which the mounting section is connected, A lateral work section is connected to at least one end of the central work section in a manner that allows it to be folded and unfolded, A drive means for folding and unfolding the lateral work section relative to the central work section, The system includes a drive assisting means for assisting the folding and unfolding of the lateral work section by the drive means, One end of the drive assist means is attached to the support frame, and the other end is attached to the lateral work section. A farming machine characterized by the following features.
2. A work section pivot shaft portion that rotatably supports the lateral work section relative to the central work section, The drive assist means is provided with a drive assist means pivot shaft portion that rotatably supports the drive assist means with respect to the support frame, The agricultural machine according to claim 1, characterized in that, in an axial view of the rotating shaft portion of the working section, the axis of the rotating shaft portion of the drive assisting means is located in the vicinity of the axis of the rotating shaft portion of the working section.
3. The agricultural machine according to claim 2, characterized in that, in the axial view, the axis of the rotating shaft portion of the drive assisting means and the axis of the rotating shaft portion of the working part coincide.
4. It is fixed to the support frame and includes a mounting portion to which one end of the drive assist means is attached, The agricultural implement according to any one of claims 1 to 3, characterized in that the mounting portion extends rearward and upward with respect to the support frame.