Rice field work machine

Abstract

To provide a rice field work machine in which straw waste, long culms, etc. hardly twine around a rotation body of a ground-levelling rotor.SOLUTION: A rice field work machine includes a travelling machine body that travels on a rice field surface, a work device supported at the rear part of the travelling machine body, and a ground-levelling rotor 20 for levelling the rice field surface in front of the work device. The ground-levelling rotor 20 includes a rotation body 22 that rotates around a shaft core extending in a lateral direction of the machine body, and a fixed body 23 provided along a shaft core direction, which is fixed so as not to rotate around the shaft core.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to a paddy field working machine. [Background technology]

[0002] For example, the paddy field working machine disclosed in Patent Document 1 is provided with a soil leveling rotor (referred to in the document as a "soil leveling rotor"), and the soil leveling rotor is provided with a rotor. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2022-17756 Summary of the Invention [Problem to be solved by the invention]

[0004] The rotors are aligned along the axis. However, because straw chips and culms are present on the surface of the rice field, there is a risk that the straw chips and culms may get wrapped around the rotors. If the straw chips and culms get wrapped around the rotors, it is very difficult for the worker to remove them from the rotors. For this reason, the challenge was how to improve the soil leveling rotor so that the straw chips and culms do not easily get wrapped around the rotors.

[0005] The present invention aims to provide a paddy field working machine in which straw scraps, stalks, etc. are less likely to become entangled around the soil leveling rotor. [Means for solving the problem]

[0006] The paddy field working machine of the present invention is equipped with a running body that runs on the surface of the rice field, a working device supported at the rear of the running body, and a ground leveling rotor that levels the rice field surface in front of the working device, and is characterized in that the ground leveling rotor has a rotating body that rotates around an axis extending laterally across the body, and a fixed body that is arranged along the axis direction and is fixed so as not to rotate around the axis.

[0007] According to the present invention, the soil leveling rotor is provided with a rotor and a fixed body. By fixing the fixed body, straw scraps, long stalks, etc. are less likely to get wrapped around the fixed body. With this configuration, compared to a configuration in which the soil leveling rotor is not provided with a fixed body, straw scraps, long stalks, etc. are less likely to get wrapped around the soil leveling rotor. This realizes a paddy field working machine in which straw scraps, long stalks, etc. are less likely to get wrapped around the soil leveling rotor.

[0008] In the present invention, it is preferable that the ground leveling rotor has a support shaft extending along the axial direction, the rotating body is configured to be fitted onto the support shaft and rotate integrally with the support shaft, and the fixed body is configured to cover the support shaft from the outer periphery and not rotate integrally with the support shaft.

[0009] With this configuration, the risk of straw scraps, stalks, etc. becoming wrapped around the support shaft is reduced compared to a configuration in which the fixing body does not cover the support shaft.

[0010] In the present invention, the rotating body preferably has a plurality of large diameter rotating bodies arranged along the axial direction, and a small diameter rotating body having an outer diameter smaller than the outer diameter of the large diameter rotating bodies and arranged along the axial direction, and the fixed body preferably covers the small diameter rotating bodies from the outer periphery.

[0011] The outer diameter of the small diameter rotor is smaller than that of the large diameter rotor. Therefore, straw scraps, long stalks, etc. are more likely to wrap around the small diameter rotor than the large diameter rotor. With this configuration, the fixed body covers the small diameter rotor. This reduces the risk of straw scraps, long stalks, etc. wrapping around the small diameter rotor compared to a configuration in which the fixed body does not cover the small diameter rotor.

[0012] In the present invention, it is preferable that the rotating body has a plurality of small diameter rotating bodies arranged along the axial direction, and the fixed body covers at least one of the plurality of small diameter rotating bodies.

[0013] This configuration increases the degree of freedom in the layout of the small diameter rotating body that is covered by the fixed body and the small diameter rotating body that is not covered by the fixed body.

[0014] In the present invention, it is preferable that the fixed body covers at least one of the plurality of small diameter rotating bodies that is located inside in the lateral direction of the machine body.

[0015] When straw scraps, stalks, etc. get wrapped around the small diameter rotor located on the inside in the lateral direction of the machine body, the worker, etc., has to get under the machine body to remove the straw scraps, stalks, etc., which can be troublesome. With this configuration, the risk of straw scraps, stalks, etc. getting wrapped around the small diameter rotor located on the inside in the lateral direction of the machine body is reduced, and the frequency with which the worker, etc., has to perform the above-mentioned troublesome work is reduced.

[0016] In the present invention, it is preferable that the fixed body is disposed so that the large diameter rotating bodies are located on the left and right sides, and that the outer diameter of the fixed body is formed smaller than the outer diameter of the large diameter rotating bodies.

[0017] This configuration allows the fixed body to cover the small diameter rotors located between the large diameter rotors, reducing the risk of straw dust, stalks, etc. getting wrapped around the small diameter rotors. In addition, when the soil leveling rotor levels the rice field surface, muddy water, etc. pushed aside by the large diameter rotors can be easily removed from the fixed body.

[0018] In the present invention, it is preferable that a gap is formed between the fixed body and the large diameter rotor along the axial direction.

[0019] With this configuration, contact between the fixed body and the large diameter rotor is avoided when the ground leveling rotor rotates, thereby preventing wear due to friction on at least one of the fixed body and the large diameter rotor.

[0020] In the present invention, it is preferable that a mudguard member is provided on the outer periphery of the rotating body, and a support frame is provided to support the mudguard member, and the fixed body is supported by the support frame.

[0021] With this configuration, the support frame serves both as a support for the fixed body and as a mudguard member, thereby simplifying the support structure for the fixed body.

[0022] In the present invention, a ground leveling float that follows the surface of the rice field and a float detection mechanism that detects the up and down movement of the ground leveling float are provided, and it is preferable that the fixed body overlaps with the float detection mechanism when viewed in a plan view of the aircraft.

[0023] This configuration reduces the risk of straw chips, stalks, etc. getting wrapped around the part of the soil leveling rotor near the float detection mechanism. This reduces the risk of straw chips, stalks, etc. coming into contact with the float detection mechanism.

[0024] In the present invention, a plurality of ground leveling floats are arranged along the lateral direction of the aircraft and follow the surface of the rice field in contact with the ground, and it is preferable that the fixed body overlaps with a center float that is located in the center of the left and right of the plurality of ground leveling floats when viewed from the fore-and-aft direction of the aircraft.

[0025] This configuration reduces the risk of straw scraps, stalks, etc. becoming entangled around the soil leveling rotor at the left-right center of the machine body.

[0026] In the present invention, it is preferable that a transmission shaft is provided to transmit power from a drive source to the working device, and that at least a portion of the fixed body overlaps with the transmission shaft when viewed in the fore-and-aft direction of the machine body.

[0027] When straw scraps, stalks, etc. are wound around the rotating body and pile up, the straw scraps, stalks, etc. may also be wound around the transmission shaft, which may result in an extra driving load on the drive source. With this configuration, the fixed body is disposed at the location where the transmission shaft and the rotating shaft overlap when viewed from the front to rear of the machine body. This reduces the risk of straw scraps, stalks, etc. winding around the transmission shaft. [Brief description of the drawings]

[0028] [Figure 1] FIG. 1 is a side view of a rice transplanter, which is an example of a paddy field working machine. [Diagram 2] FIG. 4 is a plan view showing the bottom of the seedling planting device. [Diagram 3] FIG. 2 is a plan view showing the ground leveling rotor and the ground leveling float. [Figure 4] FIG. [Diagram 5] FIG. 4 is a cross-sectional view showing a small diameter rotating body covered with a fixed body. [Figure 6] FIG. 4 is a cross-sectional view showing a small diameter rotating body covered with a fixed body. [Figure 7] FIG. 4 is an enlarged view of a main portion showing a gap between a fixed body and a large diameter rotor. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0029] An embodiment illustrating the paddy field working machine of the present invention will be described based on the riding rice transplanter shown in Figures 1 to 7. Note that the direction of the arrow "FW" shown in the figures is the "forward direction of the machine body", the direction of the arrow "BK" shown in the figures is the "rearward direction of the machine body", the direction of the arrow "LH" shown in the figures is the "leftward direction of the machine body", the direction of the arrow "RH" shown in the figures is the "rightward direction of the machine body", the direction of the arrow "UP" shown in the figures is the "upward direction of the machine body", and the direction of the arrow "DW" shown in the figures is the "downward direction of the machine body".

[0030] [Overall configuration of riding rice transplanter] As shown in Fig. 1, the machine is provided with left and right front wheels 1 and left and right rear wheels 2. A traveling body 3 is supported by the left and right front wheels 1 and the left and right rear wheels 2. A driver's seat 6 and a steering wheel 7 are provided on the traveling body 3. An operator steers the front wheels 1 with the steering wheel 7. A support frame 8 extending vertically is connected to each of the right and left parts at the front of the traveling body 3. A spare seedling stand 9 is attached to the support frame 8.

[0031] The seedling planting device 10 is supported at the rear of the traveling body 3 via a link mechanism 4. One end of the hydraulic actuator 5 is rotatably connected to the rear of the traveling body 3, and the other end of the hydraulic actuator 5 is rotatably connected to the link mechanism 4. The link mechanism 4 swings up and down in response to the expansion and contraction of the hydraulic actuator 5, and the seedling planting device 10 rises and falls in response to the swinging of the link mechanism 4. The seedling planting device 10 is an example of a "working device" as defined in the claims.

[0032] As shown in Fig. 1, the seedling planting device 10 has a seedling carrying table 18 and a soil leveling rotor 20. The soil leveling rotor 20 is supported on the front lower part of the seedling planting device 10. As shown in Figs. 2 and 3, the seedling planting device 10 has a feed case 11, a support frame 12, an intermediate transmission case 13, a planting transmission case 14, a rotating case 15, a planting arm 16, and a soil leveling float 17.

[0033] The feed case 11 is supported at the rear lower part of the link mechanism 4. A square pipe-shaped support frame 12 extends along the lateral direction of the traveling body 3. The left and right central parts of the support frame 12 are connected to the feed case 11. A plurality of planting transmission cases 14 are connected to the support frame 12 and extend rearward. The planting transmission cases 14 support an intermediate transmission case 13 and a seedling carrying table 18. Two rotating cases 15 are rotatably supported at the rear of each planting transmission case 14. Two planting arms 16 are attached to each rotating case 15 so as to be rotatable relative to the rotating case 15.

[0034] Although not shown, an engine is mounted on the traveling body 3 as a drive source, and the seedling carrier 18 is provided with a reciprocating drive mechanism. The engine power is distributed to the ground leveling rotor 20, the reciprocating drive mechanism of the seedling carrier 18, the rotating case 15, and the planting arm 16 via the transmission shaft 19, the intermediate shaft inside the feed case 11, and the intermediate shaft inside the intermediate transmission case 13. Leveling of the field surface by the ground leveling rotor 20, left-right reciprocating drive of the seedling carrier 18, rotational drive of the rotating case 15, removal of seedlings from the seedling carrier 18 by the planting arm 16 and planting of the seedlings on the field surface are all performed simultaneously with the forward movement of the traveling body 3. The drive source is not limited to an engine, and may be, for example, an electric motor.

[0035] In the front-rear direction of the traveling body 3, a soil leveling float 17 is provided between the soil leveling rotor 20 and the planting arm 16. The soil leveling float 17 follows the surface of the paddy field. In this embodiment, one center float 17A and four side floats 17B are provided as the soil leveling float 17. The center float 17A is located in the central area in the lateral direction of the traveling body 3. The width of the center float 17A is wider than the width of the side float 17B. Two side floats 17B are arranged on the right side of the center float 17A, and two side floats 17B are arranged on the left side of the center float 17A. In this way, the center float 17A and the four side floats 17B are arranged along the lateral direction of the traveling body 3. The number of side floats 17B can be changed as appropriate.

[0036] [Configuration of the ground leveling rotor] As shown in Fig. 1 and Fig. 2, a soil leveling rotor 20 is disposed behind the rear wheel 2. The soil leveling rotor 20 levels the rice field surface in front of the seedling planting device 10. As shown in Figs. 2 to 4, the soil leveling rotor 20 is supported by a transmission case portion 31 and a support frame 32. The soil leveling rotor 20 has a support shaft 21, a rotor 22 for soil leveling, and a fixed body 23.

[0037] As shown in Fig. 2, the transmission case section 31 is connected to the left end of the intermediate transmission case 13, and the support bracket 33 is connected to the right end of the support frame 12. The transmission case section 31 is supported by the intermediate transmission case 13 so as to be vertically swingable about an axis P1 along the lateral direction of the traveling body 3, and extends diagonally forward and downward. The support frame 32 is supported by the support bracket 33 so as to be vertically swingable about the axis P1, and extends diagonally forward and downward. The axis P1 is the same as the rotation axis of the intermediate shaft inside the intermediate transmission case 13.

[0038] Both ends of the support shaft 21 are supported by the front parts of the transmission case portion 31 and the support frame 32. The support shaft 21 extends along an axis P2 that extends laterally of the traveling body 3, and is rotatable about the axis P2. A plurality of rotating bodies 22 are attached to the support shaft 21. These rotating bodies 22 are fitted onto the outside of the support shaft 21, and are configured to rotate integrally with the support shaft 21 about the axis P2. The axis P2, the support shaft 21, and the rotating bodies 22 are located in front of the ground leveling float 17.

[0039] 3 and 4, an arm of a ground leveling lifting mechanism 34 is pivotally connected to the support shaft 21 of the ground leveling rotor 20. The ground leveling lifting mechanism 34 can drive the ground leveling rotor 20 to lift and lower by being driven by a motor.

[0040] A round pipe-shaped support frame 41 is connected to each of the transmission case portion 31 and the support frame 32. The support frame 41 is connected to a mudguard member 42 made of sheet metal and supports the mudguard member 42. The support frame 41 and the mudguard member 42 are located in front of the ground leveling float 17. The mudguard member 42 is provided on the outer periphery of the rotating body 22 and covers the rotating body 22 from above and behind. The ground leveling rotor 20, the support frame 41 and the mudguard member 42 rise and fall together in response to the lifting and lowering drive of the ground leveling lifting mechanism 34.

[0041] Although not shown, an endless rotating chain and a pair of sprockets are mounted inside the transmission case section 31. The mechanism inside the transmission case section 31 receives power from the intermediate transmission case 13 and transmits the power to the support shaft 21. This causes the support shaft 21 and the rotating body 22 to rotate counterclockwise in FIG. 1. In other words, a transmission mechanism that transmits rotational power to the support shaft 21 and the rotating body 22 is disposed at the left end of the land leveling rotor 20. As the rotating body 22 rotates, the rice field surface is leveled, and mud is thrown backward from the rotating body 22, but this mud is caught by the mudguard member 42.

[0042] The rotor 22 is made of resin. The resin includes, for example, thermoplastic resin, thermosetting resin, etc. The resin may also include elastic materials such as synthetic rubber, synthetic fibers, adhesives, etc.

[0043] In this embodiment, a large diameter rotor 22A and a small diameter rotor 22B are provided as the ground leveling rotor 22. The multiple large diameter rotors 22A and the multiple small diameter rotors 22B are arranged along the axis P2. The small diameter rotor 22B has an outer diameter smaller than the outer diameter of the large diameter rotor 22A.

[0044] In this embodiment, the large diameter rotor 22A is provided with a disk rotating part 22C at a portion adjacent to the small diameter rotor 22B. The left and right ends of the rotor 22 are configured as the large diameter rotor 22A, and the left and right ends of the rotor 22 are provided with disk rotating parts 22C. The outer peripheral edge of the disk rotating part 22C is formed in a circular shape over the entire circumference. When the disk rotating part 22C of the large diameter rotor 22A rotates with the forward movement of the traveling machine body 3, straw, etc. left in the field is pushed downward from the rice field surface by the disk rotating part 22C of the large diameter rotor 22A. This reduces the risk of the straw, etc., getting wrapped around the large diameter rotor 22A.

[0045] In this embodiment, the small diameter rotors 22B are provided in four locations. Two of the four small diameter rotors 22B are provided in front of the center float 17A, and these small diameter rotors 22B are covered by the fixed body 23. The remaining two small diameter rotors 22B are provided behind the rear wheel 2. That is, the fixed body 23 overlaps with the center float 17A, which is located in the left-right center of the multiple ground leveling floats 17, when viewed in the front-rear direction of the traveling body 3.

[0046] The fixed body 23 is formed in a cylindrical shape and is made of metal. The fixed body 23 covers the support shaft 21 and the small diameter rotor 22B from the outer periphery. The fixed body 23 may be made of resin, synthetic rubber, synthetic fiber, a composite material thereof, or the like.

[0047] 5 and 6 are cross-sectional views showing two small diameter rotors 22B covered by the fixed body 23. FIG. 5 is a cross-sectional view showing the small diameter rotor 22B and the fixed body 23 on the left side of the traveling body 3. The small diameter rotor 22B shown in FIG. 5 is located in the center of the rotor 22 from left to right, and the transmission shaft 19 is arranged above it. FIG. 6 is a cross-sectional view showing the small diameter rotor 22B and the fixed body 23 on the right side of the traveling body 3, and the float detection mechanism 35 is arranged above it. These small diameter rotors 22B are formed in the shape of a six-pointed star in cross-sectional view. The outer periphery of these small diameter rotors 22B is covered by the fixed body 23. The outer diameter of the fixed body 23 is formed to be smaller than the outer diameter of the large diameter rotor 22A.

[0048] 3, the left fixed body 23 of the two fixed bodies 23 and the small diameter rotating body 22B covered by this fixed body 23 overlap with the transmission shaft 19 in a plan view of the traveling body 3. In addition, the right fixed body 23 of the two fixed bodies 23 and the small diameter rotating body 22B covered by this fixed body 23 overlap with the float detection mechanism 35 in a plan view of the traveling body 3. The float detection mechanism 35 detects the up and down movement of the ground leveling float 17.

[0049] When the seedling planting device 10 rises due to the contraction of the hydraulic actuator 5, the distance between the rotor 22 and the transmission shaft 19 decreases, and the distance between the rotor 22 and the float detection mechanism 35 also decreases. The small diameter rotor 22B is provided to avoid interference between the rotor 22 and the transmission shaft 19 and between the rotor 22 and the float detection mechanism 35 when the seedling planting device 10 rises. The outer diameter of the fixed body 23 is formed smaller than the outer diameter of the large diameter rotor 22A, so that interference between the fixed body 23 and the transmission shaft 19 and between the fixed body 23 and the float detection mechanism 35 is avoided when the seedling planting device 10 rises.

[0050] The support frame 41 is provided with brackets 41a and 41b in the vicinity of the fixed body 23. The brackets 41a and 41b are fixed to the frame body of the support frame 41 by welding. Furthermore, the bracket 23a is fixed to the cylindrical outer circumferential surface portion of the fixed body 23 by welding. Bolt holes are formed in the brackets 41a and 41b of the support frame 41 and the bracket 23a of the fixed body 23. The fixed body 23 is supported by the support frame 41 by fastening bolts to these bolt holes.

[0051] In this way, the fixed body 23 covers the support shaft 21 and the small diameter rotating body 22B from the outer periphery and is configured not to rotate integrally with the support shaft 21 and the small diameter rotating body 22B. In other words, the fixed body 23 is provided along the direction of the axis P2 and is fixed so as not to rotate around the axis P2. When the rotating body 22 rotates, the long culms, etc. left in the field at the time of harvesting tend to get wrapped around the small diameter rotating body 22B. In the small diameter rotating body 22B located closer to the center of the traveling body 3 than the rear wheel 2, it was difficult for the worker to remove the wrapped long culms, etc. from the small diameter rotating body 22B, but the configuration in which the fixed body 23 is provided in this part reduces the risk of the long culms, etc. getting wrapped around this part.

[0052] In addition, when straw chips, stalks, etc. are wound around the rotor 22 and pile up, the straw chips, stalks, etc. may also be wound around the transmission shaft 19, which may cause an extra driving load on the engine (driving source) (not shown). For example, as shown in FIG. 4, when the leveling rotor 20 is raised by the leveling lifting mechanism 34 and the transmission shaft 19 and the rotor 22 overlap when viewed in the front-rear direction of the machine, the leveling rotor 20 performs leveling of the rice field surface, which further increases the risk of straw chips, stalks, etc. being wound around the transmission shaft 19. In this embodiment, as shown in FIG. 4, the fixed body 23 is disposed at the location where the transmission shaft 19 and the rotor 22 overlap when viewed in the front-rear direction of the machine. This reduces the risk of straw chips, stalks, etc. being wound around the transmission shaft 19. In other words, within the range in which the ground leveling rotor 20 is raised and lowered by the ground leveling lifting mechanism 34, at least a portion of the fixed body 23 overlaps with the transmission shaft 19 when viewed in the fore-and-aft direction of the vehicle body.

[0053] As shown in FIG. 3, FIG. 4 and FIG. 7, the fixed body 23 is arranged so that the large diameter rotors 22A are located on the left and right sides, respectively. In other words, the fixed body 23 is arranged so as to be sandwiched between the two large diameter rotors 22A. The fixed body 23 is made of metal, and the rotor 22 is made of resin. When friction occurs between the rotor 22 and the fixed body 23 when the rotor 22 rotates, the disk rotation part 22C of the large diameter rotor 22A in particular is worn. In this embodiment, as shown in FIG. 7, a gap d is formed between the fixed body 23 and the disk rotation part 22C of the large diameter rotor 22A along the direction of the axis P2. As a result, when the rotor 22 rotates, the fixed body 23 and the disk rotation part 22C of the large diameter rotor 22A do not come into contact with each other, and the risk of the disk rotation part 22C of the large diameter rotor 22A being worn is reduced.

[0054] [Another embodiment] The present invention is not limited to the configurations exemplified in the above-described embodiments, and other representative embodiments of the present invention will be described below.

[0055] (1) In the above embodiment, the seedling planting device 10 is exemplified as the working device. However, the working device is not limited to this embodiment, and may be, for example, a sowing device, a fertilizing device, a drug application device, or the like.

[0056] (2) In the above embodiment, the fixed body 23 is not attached to each of the two small diameter rotating bodies 22B located immediately behind the rear wheel 2. This embodiment is not limited to this embodiment, and the fixed body 23 may be attached to each of the two small diameter rotating bodies 22B located immediately behind the rear wheel 2. In other words, the fixed body 23 may be configured to cover at least the small diameter rotating body 22B located on the inner side in the lateral direction of the aircraft among the multiple small diameter rotating bodies 22B. Also, the fixed body 23 may be configured to be attached to only one of the two small diameter rotating bodies 22B located in front of the center float 17A. In other words, the fixed body 23 may be configured to cover at least one of the multiple small diameter rotating bodies 22B.

[0057] (3) In the above embodiment, the large diameter rotor 22A is provided with the disk rotation unit 22C. However, the present invention is not limited to this embodiment, and the large diameter rotor 22A may not be provided with the disk rotation unit 22C.

[0058] (4) In the above embodiment, the arm of the ground leveling lifting mechanism 34 is pivotally connected to the support shaft 21 of the ground leveling rotor 20. The ground leveling lifting mechanism 34 may be connected to either the left or right end of the ground leveling rotor 20. Also, the ground leveling lifting mechanism 34 may not be provided in the configuration.

[0059] (5) In the above embodiment, the mudguard member 42 is made of sheet metal. However, the present invention is not limited to this embodiment, and the mudguard member 42 may be made of resin, rubber, ceramic, or the like. Alternatively, the mudguard member 42 may not be provided.

[0060] (6) The shape of the cross-sectional outer periphery of the small diameter rotor 22B, i.e., the shape of the outer periphery, may be formed into a cylindrical shape like the fixed body 23. In this case, the above-mentioned fixed body 23 may not be provided. This makes it difficult for long culms, etc. left in the field at the time of harvesting to get caught on the small diameter rotor 22B, reducing the risk of the long culms, etc., wrapping around the small diameter rotor 22B. In addition, with this configuration, the risk of the disk rotor 22C wearing due to friction caused by the fixed body 23 and the rotor 22 being adjacent to each other is avoided.

[0061] (7) In the above embodiment, the fixed body 23 covers the small diameter rotor 22B over the entire circumference. This is not limited to the embodiment, and for example, the fixed body 23 may be configured to cover only the front part (traveling direction) of the small diameter rotor 22B. In this configuration, when the traveling machine body 3 moves forward, the long culms and the like are swept away up and down by the fixed body 23, reducing the risk of them being wrapped around the small diameter rotor 22B.

[0062] The configurations disclosed in the above-mentioned embodiments (including other embodiments, the same applies below) can be applied in combination with configurations disclosed in other embodiments, unless a contradiction occurs. In addition, the embodiments disclosed in this specification are merely examples, and the present invention is not limited to these embodiments, and can be appropriately modified within the scope of the present invention. [Industrial Applicability]

[0063] The present invention is applicable to paddy field working machines. [Explanation of symbols]

[0064] 3: Running body 10: Seedling planting device (work device) 17: Leveling float 17A: Center float 19: Transmission shaft 20: Ground leveling rotor 21: Support shaft 22: Rotating body 22A: Large diameter rotor 22B: Small diameter rotor 23: Fixed body 35: Float detection mechanism 41: Support frame 42: Mudguard parts P2: Axis core d: Gap

Claims

1. A traveling machine that travels on the rice field surface, A working device supported on a rear portion of the traveling machine body; A ground leveling rotor that levels the rice field surface in front of the working device is provided. The leveling rotor is a paddy field working machine having a rotating body that rotates around an axis extending laterally across the body of the machine, and a fixed body that is arranged along the axis direction and fixed so as not to rotate around the axis.

2. The ground leveling rotor has a support shaft extending along the axial direction, The rotating body is configured to be fitted onto the support shaft and to rotate integrally with the support shaft, The paddy field working machine according to claim 1, wherein the fixed body is configured to cover the outer periphery of the support shaft and not to rotate integrally with the support shaft.

3. The rotor includes a plurality of large diameter rotors arranged along the axial direction, and a small diameter rotor having an outer diameter smaller than an outer diameter of the large diameter rotors and arranged along the axial direction, The paddy field working machine according to claim 1 , wherein the fixed body covers the small diameter rotor from an outer periphery side.

4. The rotor includes a plurality of small diameter rotors arranged along the axial direction, The paddy field working machine according to claim 3 , wherein the fixed body covers at least one of the plurality of small diameter rotating bodies.

5. The paddy field working machine according to claim 4, wherein the fixed body covers at least one of the plurality of small diameter rotating bodies that is located on the inside in a lateral direction of the machine body.

6. The fixed body is disposed so that the large diameter rotating bodies are located on the left and right sides, 4. The paddy field working machine according to claim 3, wherein an outer diameter of the fixed body is smaller than an outer diameter of the large diameter rotor.

7. The paddy field working machine according to claim 3, wherein a gap is formed between the fixed body and the large diameter rotating body along the axial direction.

8. A mudguard member provided on an outer circumferential side of the rotating body; A support frame for supporting the mudguard member is provided. The paddy field working machine according to any one of claims 1 to 7, wherein the fixed body is supported by the support frame.

9. A leveling float that follows the surface of the rice field, A float detection mechanism that detects the up and down movement of the ground leveling float is provided. The paddy field working machine according to any one of claims 1 to 7, wherein the fixed body overlaps with the float detection mechanism in a plan view of the machine body.

10. The aircraft is equipped with multiple leveling floats that are aligned along the lateral direction of the aircraft and follow the surface of the rice field. The paddy field working machine according to any one of claims 1 to 7, wherein the fixed body overlaps with a centre float that is located in the left-right centre of the plurality of ground levelling floats when viewed in the fore-aft direction of the machine body.

11. A transmission shaft is provided to transmit the power of a drive source to the working device, The paddy field working machine according to any one of claims 1 to 7, wherein at least a part of the fixed body overlaps with the transmission shaft in a plan view of the machine body.

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