Agricultural working machine

Abstract

To provide a mowing working machine capable of facilitating confirmation of an attitude of a working part.SOLUTION: A mowing working machine 1 is an agricultural working machine connected to a rear side of a tractor for use. The mowing working machine 1 comprises a working part 6 configured to rotate vertically about a rotational center shaft 11 in the front-rear direction. The mowing working machine 1 comprises confirmation means 81 configured to allow an operator seated on the tractor to visually confirm an attitude of the working part 6. The confirmation means 81 is disposed at a position adjacent to the rotational center shaft 11.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to an agricultural machine. [Background technology]

[0002] BACKGROUND ART Conventionally, a grass cutting machine, which is an agricultural machine, is known, for example, as described in Patent Document 1 below.

[0003] This conventional mowing machine is used by connecting it to the rear of a tractor, which is a traveling vehicle, and is equipped with a working part (mowing part) that can rotate up and down around a rotation center axis (rotation fulcrum) in the front-to-rear direction. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2013-183637 Summary of the Invention [Problem to be solved by the invention]

[0005] In the conventional brush cutting machine described above, the working part can be rotated vertically to take on a horizontal or inclined position during work, but an operator riding on a tractor, for example, cannot easily confirm the position of the working part.

[0006] One of the objects of the embodiments of the present invention is to provide an agricultural work machine that allows the posture of the working unit to be easily confirmed. [Means for solving the problem]

[0007] An agricultural work machine according to an embodiment of the present invention is an agricultural work machine that is used by being connected to a traveling vehicle, and is equipped with a working unit that can rotate in the vertical direction around a central axis of rotation, and a confirmation means that allows a worker riding on the traveling vehicle to visually confirm the position of the working unit. [Effects of the Invention]

[0008] According to the embodiment of the present invention, the posture of the working unit can be easily confirmed. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a side view of a brush cutter according to an embodiment of the present invention. [Figure 2] FIG. [Figure 3] FIG. 2 is a perspective view of the main part of the same brush cutting machine. [Figure 4] FIG. 2 is a partially exploded perspective view of the main parts of the same brush cutting machine. [Figure 5] 1A and 1B are diagrams showing the rotational movement of the working part of the same grass cutting machine, in which (a) is a diagram showing the working part in the maximum upward tilt position, and (b) is a diagram showing the working part in the maximum downward tilt position, in which the working part is in the maximum downward tilt position. [Figure 6] 1A and 1B are diagrams showing the checking means of the same brush cutter, in which (a) is a plan view and (b) is a side view. [Figure 7] FIG. 10 is a front view of the rear cover member of the confirmation means. [Figure 8] FIG. 10 is a plan view showing a modified example of the confirmation means. DETAILED DESCRIPTION OF THE INVENTION

[0010] An embodiment of the present invention will be described with reference to FIGS.

[0011] In the drawing, reference numeral 1 denotes a grass cutting machine, which is an agricultural work machine, and this grass cutting machine 1 is a flail mower that is used by being connected (mounted) to the rear of a tractor (not shown), which is a traveling vehicle.

[0012] That is, the mowing machine 1 is detachably connected to the rear of the tractor, and moves forward (in the direction of travel) as the tractor travels, performing predetermined work, i.e., mowing work (agricultural work).

[0013] More specifically, the grass cutting implement 1 is connected to a three-point linkage (agricultural implement mounting device) at the rear of the tractor, and moves forward as the tractor travels forward, cutting and shredding the grass to be cut (for example, weeds, straw, second ears of wheat, green manure, etc.). The grass cutting implement 1 is an offset implement that can be offset to the side of the tractor, i.e., to the right, for example.

[0014] As shown in Figures 1 to 4, the mowing machine 1 comprises an attachment section 5 that is detachably connected (attached) to a three-point link section at the rear of the tractor, a working section (mowing working section) 6 that can be changed between a stored state and an offset state and can also be changed between a horizontal position and an inclined position, and that mainly performs mowing work in a desired offset state, and a connecting section (offset mechanism section) 7 that connects the front and rear attachment sections 5 and the working section 6.

[0015] The mowing machine 1 also includes an operating unit (not shown) such as a remote control operated by an operator on the tractor, a drive unit 12 for moving the working unit 6 to change the state and posture of the working unit 6, a first detection unit 13 for detecting the offset amount of the working unit 6 relative to the tractor (the state of the working unit), a second detection unit 14 for detecting the posture angle of the working unit 6 relative to the tractor (the posture of the working unit), and a control unit (control box) 15 for controlling the drive unit 12 based on information (signals) from the first detection unit 13, the second detection unit 14 and the operating unit, etc.

[0016] The drive unit 12 has a first cylinder (offset cylinder) 16, which is an extendable and retractable first drive means for offsetting that moves the working unit 6 left and right relative to the mounting unit 5, and a second cylinder (tilt cylinder) 17, which is an extendable and retractable second drive means for changing posture that rotates the working unit 6 up and down about a rotation center axis (rotation fulcrum) 11 in the front-to-rear direction relative to the connecting unit 7. Each of the cylinders 16, 17 is, for example, an electric hydraulic cylinder. Each of the detectors 13, 14 is, for example, a potentiometer.

[0017] Here, the working unit 6 can perform grass cutting not only in the offset state but also in a stored state where it is stored in the rear of the tractor. The stored state is a state where the working unit 6 is located in a stored position at the rear of the tractor (a position where substantially the entire working unit 6 is stored within the width of the tractor). The offset state is a state where the working unit 6 is located in an offset position that is shifted to the right by a desired offset amount (movement amount) from the stored position at the rear of the tractor.

[0018] The working unit 6 can be moved left and right relative to the tractor (mounting unit) between the storage position and the maximum offset position by extending and retracting the first cylinder 16, and can be positioned at either of these positions or at any position between them.

[0019] Furthermore, at least in the offset state, the working unit 6 can perform grass cutting work in either a horizontal position along the horizontal left-right direction or an upward or downward inclined position (an upward inclined position with the left low and the right high and a downward inclined position with the left high and the right low).

[0020] The working unit 6 can be rotated up and down around the longitudinal pivot axis 11 relative to the tractor (mounting unit) by extending and retracting the second cylinder 17 between the maximum upward tilt position (the highest position where the right end of the working unit is located) and the maximum downward tilt position (the lowest position where the right end of the working unit is located), and can be positioned at either of these positions and any position between them (including a horizontal position corresponding to a horizontal posture).

[0021] In addition, an operator sitting in the driver's seat of the tractor can rotate the working unit 6 up and down around the rotation center axis 11 between the maximum upward tilt position and the maximum downward tilt position (including the horizontal position) by operating the operating unit to extend and retract the second cylinder 17, regardless of whether the tractor is in the stored state or the offset state (see Figure 5).

[0022] The maximum tilt angle α upward with respect to the horizontal direction shown in Fig. 5(a) is, for example, 70°, and the maximum tilt angle β downward with respect to the horizontal direction shown in Fig. 5(b) is, for example, 55° (similar to Fig. 7). These tilt angles α and β are not limited to the angles shown in the figures and may be other angles, or for example, both may be the same angle.

[0023] The mounting unit 5 has a hitch frame 21, which is a mounting frame, and a three-point connecting unit 22 that is detachably connected to a three-point link unit at the rear of the tractor is provided on the hitch frame 21. The three-point connecting unit 22 has a top mast 24 that holds a top pin 23, and a pair of left and right lower arms 26 that hold lower pins 25.

[0024] The hitch frame 21 is also provided with an input shaft holder 29 that rotatably holds an input shaft 28 that receives power from the tractor. The input shaft 28 is connected to a PTO shaft of the tractor (not shown) via a joint, and inputs power from the PTO shaft to the brush cutter 1. Furthermore, an arm attachment portion 30 is provided on the right side of the hitch frame 21.

[0025] The connecting portion 7 has two pivoting arms (parallel links) 41 whose front ends are rotatably attached to the arm mounting portion 30 via axes 46, and the rear ends of each connecting arm 41 are rotatably attached to the arm mounting member 42 via axes 47.

[0026] Furthermore, a rotation central axis (rotation fulcrum) 11 in the front-to-rear direction is fixed to the arm attachment member (fulcrum frame) 42, and this rotation central axis 11 is held by a bearing member 31 of the working unit 6, and this bearing member 31 is rotatable about the rotation central axis 11. In other words, the working unit 6 is rotatable in the up-and-down direction about the round-shaft-shaped rotation central axis (central axis portion) 11 fixed to the arm attachment member (arm attachment portion) 42 of the connecting portion 7.

[0027] The second detector 14 detects the rotation angle of the bearing member 31 relative to the rotation center axis 11 of the connecting part 7, in other words, the vertical rotation angle of the working part 6 relative to the mounting part 5, and transmits this information to the control part 15. The first detector 13 detects the horizontal rotation angle of the connecting arm 41 relative to the mounting part 5, and transmits this information to the control part 15.

[0028] 4, the bearing member 31 is attached to a bearing mount 35 of the working unit 6 by means of attachment means 34, for example, consisting of a bolt 32 and a nut 33. The bearing member 31 has a cylindrical bearing sleeve portion 36, into which the pivot shaft 11 is inserted, and a plate 37 is attached to the rear end of the pivot shaft 11 by a bolt 38, and the plate 37 has a pin 39.

[0029] The pin 39 is inserted into a hole 14b in a lever 14a of a potentiometer, which is the second detection unit 14. A support base 40 that supports the potentiometer, which is the second detection unit 14, is attached to a bearing mount 35 with bolts 20. The bearing mount 35 is fixed to the top surface of a cover body 75 of the working unit 6.

[0030] The arm mounting member 42 also has a cylinder mounting portion 43, and the tip end of the rod 17a of the second cylinder 17 is rotatably mounted to this cylinder mounting portion 43 via a headed pin 44 welded to a plate 66 that is bolted to the cylinder mounting portion 43. The base end of the cylinder body 17b of the second cylinder 17 is rotatably mounted to a cylinder mounting base 48 via a headed pin 45 welded to a plate 67 that is bolted to the cylinder mounting base 48. The cylinder mounting base 48 is bolted to the top surface of a cover body 75 of the working unit 6.

[0031] The rotation center shaft 11, bearing member 31, bearing mount 35, plate 37, support base 40, second detection unit 14, etc. constitute a rotation center portion 19 (the peripheral portion including the rotation center shaft).

[0032] The working unit 6 has a working body (grass-cutting working body) 51, which is a working means for performing grass-cutting work (cutting and shredding grass growing on the work surface) while rotating in a predetermined up-cut direction (the direction of the arrow in the figure), a cover means 52 for covering the working body 51, a gauge roller 50 which is a ground contact wheel arranged behind the working body 51, and a scraper 49 for removing deposits (soil, etc.) adhering to the gauge roller 50.

[0033] The working unit 6 also has a pulley case 53, which is a first transmission case body that houses a plurality of pulleys 56, 57, 58 and a belt 59, etc., and a gear case (transmission case) 54, which is a second transmission case body that houses a plurality of gears (not shown), etc.

[0034] The belt 59 in the pulley case 53 is wound around a drive pulley 56, a driven pulley 57, and a tension pulley 58, and the tension pulley 58 is biased by a tension spring 60, which serves as a biasing body. The biasing force of the tension spring 60 can be adjusted by a tension bolt 55.

[0035] An intermediate input shaft 61 is rotatably held by the gear case 54, and a power transmission means 62 that transmits power from the input shaft 28 is connected to the intermediate input shaft 61. The power input to the intermediate input shaft 61 from the power transmission means 62 is then transmitted to the working body 51, and as a result, the working body 51 is driven to rotate in a predetermined direction, that is, an up-cut direction, to perform grass cutting work.

[0036] The working body 51 has a rotating shaft 71 that is elongated in the left-right direction, and a plurality of working claws, or grass-cutting claws 74, that are detachably attached to a claw mounting portion 72 of the rotating shaft 71 via mounting members 73 and rotate in an up-cut direction to perform grass-cutting work.

[0037] The cover means 52 has a cover body 75 that is elongated in the left-right direction and is approximately plate-shaped, covering the upper side of the working body 51, and left and right cover side plates 76 that cover the lateral sides of the working body 51, and the rotation shaft 71 of the working body 51 is rotatably supported by these two cover side plates 76.

[0038] Furthermore, a lower side plate 77 is detachably provided at the bottom of each of the left and right cover side plates 76. A pulley case 53 is fixed to the outer surface of the left cover side plate 76. An elastic plate 78 and a cylinder cover member 79 are provided at the front end of the cover body 75.

[0039] On the other hand, as also shown in Figures 6 and 7, the brush cutting machine 1 is equipped with a confirmation means 81 that allows an operator riding on the tractor to visually confirm the posture of the working unit 6 (the posture angle relative to the horizontal direction perpendicular to the direction of travel) from the tractor side.

[0040] The confirmation means 81 has a cover function that covers the upper side (upper part) of the rotation central axis 11, which is the rotation center of the working unit 6, and is arranged in the vicinity of the rotation central axis 11 so as to cover the upper side of the rotation central axis 11. In other words, the confirmation means 81 is arranged in the vicinity of the rotation central part 19 that includes the rotation central axis 11, and also has a cover function that covers the rotation central part 19.

[0041] Specifically, the confirmation means 81 has a rear cover member 83 which is a first member (rotating member) that rotates around the rotation center axis 11 together with the working unit 6 when the working unit 6 rotates based on the expansion and contraction of the second cylinder 17, and a front cover member 84 which is a second member (non-rotating member) that does not rotate when the working unit 6 rotates based on the expansion and contraction of the second cylinder 17.

[0042] The rear cover member (bearing cover) 83 is attached to the bearing mounting base 35 of the working unit 6 with a screw 85, which is an attachment tool, and the front cover member (fulcrum cover) 84 is attached to the arm mounting member 42 of the connecting unit 7 with a screw 86, which is an attachment tool. These front and rear cover members 83, 84 are arranged close to each other and facing each other, with a small gap 87 between the two cover members 83, 84.

[0043] The front cover member 84 has a cover plate portion 91 that is a substantially arc-shaped plate centered on the central axis of rotation 11, and a concave surface 92 that is recessed downward is formed on the upper surface of this cover plate portion 91. This concave surface 92 is formed as a slightly curved surface that convex upward.

[0044] 6(b) is an imaginary line that shows the upper surface of the cover plate portion 91 in a side view when the concave surface 92 is not present. As is clear from this imaginary line, the recessed concave surface 92 is present so as not to obstruct the line of sight of the operator, and therefore the operator riding on the tractor can easily see the marks 103 to 107 on the rear cover member 83 side.

[0045] In addition, a single reference mark (pointing mark) 93 is provided in the center of the concave surface 92 so that it can be seen by an operator riding on a tractor.

[0046] The reference mark 93 is a sticker (a sheet-like member with an adhesive surface on the back) formed in a triangular shape, such as an isosceles triangle with its apex pointing backward (or an arrow shape, for example). The sticker can be attached to a concave surface using the adhesive surface on the back, so the attachment position can be finely adjusted.

[0047] Furthermore, a plurality of screw holes 95 are formed in the front cover member 84, and screws 86 are threaded through the screw holes 95 into female threaded portions 96 of the arm attachment member 42. The front cover member 84 has a substantially semicircular front plate portion 97, and this front plate portion 97 has cutout portions 98 formed therein for wiring.

[0048] The rear cover member 83 has a cover plate portion 101 that is substantially arc-shaped and centered on the rotation central axis 11, and a substantially semicircular arc-shaped surface (inclined surface) 102 that is centered on the rotation central axis 11 and slopes downward toward the front is formed on the front end side of the upper surface of this cover plate portion 101. As is clear from FIG. 6(b), in side view, the lower end of the inclined upper edge of the arc-shaped surface 102 facing forward is located at the same height position (including substantially the same height position) as the rear end of the front concave surface 92.

[0049] The arc-shaped surface 102 is provided with a plurality of marks (indicated marks that are scales for posture angles) 103 to 107, for example 14 marks, which can be seen by an operator riding on a tractor, and are positioned at intervals in the arc direction (longitudinal direction) of the arc-shaped surface 102.

[0050] That is, one marker 103 for the horizontal position, one marker 104 for the maximum upward tilt position, one marker 105 for the maximum downward tilt position, six intermediate markers 106 for the upward tilt position, and five intermediate markers 107 for the downward tilt position are arranged side by side on the arc-shaped surface 102 of the rear cover member 83.

[0051] Here, when the working unit 6 is in a horizontal position, the horizontal posture mark 103 is located at a position corresponding to the reference mark 93, i.e., for example, at a position closely facing the reference mark 93 (a position near the rear of the reference mark) when the working unit 6 is in a horizontal position.

[0052] The mark 104 for the maximum upward tilt posture is located at a position corresponding to the reference mark 93, i.e., for example, at a position closely facing the reference mark 93 (a position near the rear of the reference mark) when the working unit 6 is in the maximum upward tilt posture in which it is positioned at the maximum upward tilt position (highest raised position).

[0053] The mark 105 for the maximum downward tilt posture is located at a position corresponding to the reference mark 93, i.e., for example, at a position closely facing the reference mark 93 (a position near the rear of the reference mark) when the working unit 6 is in the maximum downward tilt posture in which it is positioned at the maximum downward tilt position (lowest position).

[0054] The intermediate marks 106 for the upward tilt position are provided at equal intervals (for example, 10° intervals) on the arc-shaped surface 102 in the portion between the mark 103 for the horizontal position and the mark 104 for the maximum upward tilt position, and are located at a position corresponding to the reference mark 93, i.e., for example, at a position closely facing the reference mark 93 (a position near the rear of the reference mark) when the working unit 6 is in an intermediate upward tilt position at an intermediate position (for example, 10°, 20°, etc.) between the horizontal position and the maximum upward tilt position.

[0055] The intermediate marks 107 for the downward tilt position are provided at equal intervals (for example, 10° intervals) on the arc-shaped surface 102 in the portion between the mark 103 for the horizontal position and the mark 105 for the maximum downward tilt position, and are located at a position corresponding to the reference mark 93, i.e., for example, at a position closely facing the reference mark 93 (a position near the rear of the reference mark) when the working unit 6 is in an intermediate downward tilt position at an intermediate position (for example, 10°, 20°, etc.) between the horizontal position and the maximum downward tilt position.

[0056] Each of the plurality of marks 103 to 107 is made up of a sticker (a sheet-like member having an adhesive surface on the back side) formed in, for example, an elongated, approximately elliptical shape (it may also be, for example, a perfect circle or a rectangle), and each of these stickers can be attached to the arc-shaped surface 102 using the adhesive surface on the back side, so that the attachment position can be finely adjusted. Note that the marks 103 to 107 do not have to be made up of individual stickers, and for example, the marks 103 to 107 may be displayed by printing or the like on the surface of a single strip-shaped sticker (a sheet-like member having an adhesive surface on the back side) that can be attached along the arc-shaped surface 102.

[0057] 7, in a front view (view from the front), the marks 103 to 107 are positioned side by side at intervals on an imaginary circle K whose center is the center point P of the rotation central axis 11.

[0058] 7, the angle α is, for example, 70°, the angle β is, for example, 55°, and the angle γ is, for example, 10°. Although not shown, a numerical value (e.g., 0°, +10°, -10°, etc.) indicating the numerical value of the attitude angle of the working unit 6 (the tilt angle relative to the horizontal direction) may be added next to the corresponding mark.

[0059] Furthermore, the horizontal position mark 103, the maximum upward tilt position mark 104, and the maximum downward tilt position mark 105 are, for example, red, while the other intermediate marks 106, 107 are a different color, for example, white. Like the intermediate marks 106, 107, the reference mark 93 on the front cover member 84 side is, for example, white, and this reference mark 93 is, for example, larger than the marks 103-107 on the rear cover member 83 side. Note that the colors of the marks 93, 103-107 may be arbitrary, but it is preferable that the three marks 103, 104, 105 be displayed in a conspicuous manner.

[0060] A plurality of screw holes 109 are formed in the rear cover member 83, and the screws 85 are threaded through the screw holes 109 into the female threads 110 of the bearing mount 35.

[0061] Next, the operation of the brush cutting machine 1 will be described.

[0062] When the tractor with the grass cutting implement 1 connected to the rear is driven forward to move the grass cutting implement 1 forward (in the direction of travel), the working body 51 of the working section 6 performs grass cutting work while rotating in the predetermined direction, that is, the up-cut direction.

[0063] During such work, the worker on the tractor sets the tilt angle (posture angle) of the working unit 6 in the offset state relative to the horizontal direction, for example, in accordance with the surface of the work target.

[0064] For example, if the work surface on which grass grows is a horizontal plane, the working unit 6 is set to a horizontal position, or if the work surface is an inclined surface, the working unit 6 is set to an inclined position corresponding to the work surface.

[0065] At this time, the worker on the tractor can visually check the posture of the working unit 6 in the offset state while sitting in the driver's seat of the tractor by looking at the colored marks 93, 103, 104, 105, 106, 107 attached with adhesive surfaces to the cover members 83, 84 of the confirmation means 81.

[0066] Even when the working unit 6 is in a stored state positioned at the rear of the tractor, the worker on the tractor can use the confirmation means 81 to visually check the posture of the working unit 6 in the stored state.

[0067] Furthermore, such a brush cutting machine 1 is provided with a confirmation means 81 that allows the operator on the tractor to visually confirm the posture of the working unit 6, and this confirmation means 81 is positioned in the vicinity of the pivot axis 11, which is the pivot point of the working unit 6. Therefore, by using the confirmation means 81, the operator on the tractor can easily and appropriately confirm the posture of the working unit 6 from the tractor side without relying solely on their senses, thereby improving operability, etc.

[0068] In addition, the confirmation means 81 has a rear cover member 83 that rotates together with the working unit 6 when the working unit 6 rotates, and a front cover member 84 that does not rotate when the working unit 6 rotates, and a reference mark 93 is provided on the concave surface 92 of the front cover member 84, and marks 103 to 107 indicated by the reference mark 93 are provided on the arc-shaped surface 102 of the rear cover member 84, so that the worker riding on the tractor can more easily and appropriately confirm the posture of the working unit 6 from the tractor side.

[0069] Furthermore, the marks 103 to 107 on the rear cover member 83 are arranged side by side at intervals on the arc-shaped surface 102 on an imaginary circle K whose center is the center point P of the pivot axis 11, so that the worker riding on the tractor can more effectively, easily and appropriately check the posture of the working unit 6 from the tractor side.

[0070] Furthermore, since the upper side of the rotation center shaft 11 is covered by both cover members 83 and 84 of the confirmation means 81, the rotation center portion 19 including the rotation center shaft 11 can be protected by both cover members 83 and 84.

[0071] In the above embodiment, a configuration has been described in which the reference mark is provided on the front cover member (second member) and the horizontal position mark, etc. is provided on the rear cover member (first member). However, the configuration may be reversed, for example, in which the reference mark is provided on the rear cover member (first member) and the horizontal position mark, etc. is provided on the front cover member (second member).

[0072] 8, instead of the intermediate mark 106 for the upward tilt position, a mark indicating the upward rotation direction (upward tilt position), i.e., a character mark 111 such as "UP," may be provided, and instead of the intermediate mark 107 for the downward tilt position, a mark indicating the downward rotation direction (downward tilt position), i.e., a character mark 112 such as "DOWN," may be provided. Note that the character marks 111 and 112 may not be provided, and instead, for example, only three marks (a mark for the horizontal position, a mark for the maximum upward tilt position, and a mark for the maximum downward tilt position) may be provided on the arc-shaped surface (inclined surface). Furthermore, the character marks 111 and 112 may be added to the configuration shown in FIG.

[0073] Furthermore, the mark (confirmation portion) of the confirmation means such as an angle gauge is not limited to being made of a sheet-like material such as an attachable sticker, but may be, for example, a convex or concave portion serving as a mark that is integrally formed on a resin cover member, and the convex or concave portion serving as a mark may be colored to make it easier to see.

[0074] Furthermore, the agricultural work machine is not limited to a grass cutting machine (grass cutter) that cuts grass on the work surface such as the ground or a field, but may also be, for example, a spreader that spreads a substance to be spread on the work surface, or a harvester that harvests crops from the work surface, and is optional.

[0075] Although several embodiments and modifications of the present invention have been described, it is also possible to combine the embodiments and modifications as appropriate without departing from the gist of the present invention. [Explanation of symbols]

[0076] 1. Grass cutting machine, which is an agricultural machine 6 Working section 11 Rotational axis 81 Verification Method 83 Rear cover member (cover member) which is the first member 84 Second member, front cover member (cover member) 92 Concave surface 93 Reference Mark 102 Arc-shaped surface 103 Horizontal position mark 104 Mark for maximum upward tilt position 105 Mark for maximum downward tilt posture

Claims

1. An agricultural work machine used by being coupled to a traveling vehicle, a working unit that can rotate in the vertical direction around a rotation central axis; a confirmation means for a worker riding on the traveling vehicle to visually confirm the posture of the working unit; An agricultural machine characterized by comprising:

2. The confirmation means is disposed in the vicinity of the rotation center axis.

2. The agricultural implement according to claim 1.

3. The confirmation means has a cover function that covers the upper side of the rotation center shaft.

3. The agricultural machine according to claim 1 or 2.

4. The means of confirmation is a first member that rotates together with the working unit when the working unit rotates; a second member that does not rotate when the working unit rotates, a reference mark is provided on one of the first member and the second member; The other of the first member and the second member has a mark for a horizontal position that is located at a position corresponding to the reference mark when the working unit is in a horizontal position; a mark for a maximum upward tilt position that is located at a position corresponding to the reference mark when the working unit is in the maximum upward tilt position; a mark for a maximum downward tilt position that is located at a position corresponding to the reference mark when the working unit is in the maximum downward tilt position; 3. The agricultural machine according to claim 1 or 2.

5. one of the first member and the second member has a concave surface; The reference mark is provided on the concave surface.

5. The agricultural implement according to claim 4.

6. the other of the first member and the second member has an arc-shaped surface centered on the rotation central axis, The horizontal position mark, the maximum upward tilt position mark, and the maximum downward tilt position mark are provided on the arc-shaped surface.

5. The agricultural implement according to claim 4.

7. The arcuate surface is formed to have a downward slope in front.

7. The agricultural implement according to claim 6.

8. The working unit can be used for mowing in either a horizontal or inclined position.

3. The agricultural machine according to claim 1 or 2.

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