Sugarcane harvester

Abstract

There was a request to ensure that maintenance work could be performed smoothly on the conveying equipment. [Solution] The machine is equipped with a conveying device for transporting crops harvested from the field toward the rear of the machine. The conveying device comprises a frame 24, a chopper drum 36b supported by the frame 24 so as to be rotatable around an axis along the left-right direction, a motor M for rotationally driving the chopper drum 36b, and a fixing mechanism K that can fix the position of the chopper drum 36b relative to the frame 24 in order to prevent the rotation of the chopper drum 36b.

Description

Technical Field

[0001] The present invention relates to a sugarcane harvester.

Background Art

[0002] A sugarcane harvester is provided with a conveying device that conveys the crops cut from the field toward the rear of the machine body. Further, the conveying device is equipped with a pair of chopper drums that have cutting blades and rotate in opposite directions to each other, and a chopper that cuts the conveyed crops with the cutting blades and then sends them out to the rear of the machine body (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the conveying device, various maintenance operations need to be performed. For example, in the chopper, a flywheel is provided to reduce rotational unevenness caused by the driving load due to the biting of crops, but there may be a case where adjustment of the tightening force of the flywheel with respect to the drive shaft is necessary. When adjusting such a tightening force, if the chopper drum rotates inadvertently, the work cannot be performed well.

[0005] Further, in the conveying device, replacement work of the cutting blades is also necessary, but in this work as well, if the chopper drum rotates inadvertently, the work cannot be performed well.

[0006] Therefore, there has been a demand to enable good performance of maintenance work in the conveying device.

Means for Solving the Problems

[0007] The characteristic configuration of the sugarcane harvester according to the present invention is that it is equipped with a conveying device for transporting the crop harvested from the field toward the rear of the machine, and the conveying device comprises a frame, a chopper drum supported by the frame so as to be rotatable around an axis along the left-right direction, a motor for rotationally driving the chopper drum, and a fixing mechanism that can fix the position of the chopper drum relative to the frame in order to prevent the rotation of the chopper drum.

[0008] According to the present invention, when tightening the chopper drum, the rotation of the chopper drum can be prevented by fixing its position relative to the frame using a fixing mechanism. In this way, the tightening operation between the chopper drum and the drive shaft can be performed effectively while the rotation of the chopper drum is prevented.

[0009] Furthermore, when replacing the cutting blade attached to the chopper drum, the chopper drum can be fixed in place. This means that even if someone tries to rotate the chopper drum unintentionally during the replacement process, the replacement can be carried out smoothly because the drum is fixed in place.

[0010] Therefore, during maintenance work on the conveying equipment, it has become possible to prevent the chopper drum from rotating unintentionally, thereby enabling the work to be carried out smoothly.

[0011] In the present invention, the fixing mechanism preferably comprises a first insertion hole formed on the chopper drum side and a second insertion hole formed on the frame side, wherein a rod is inserted through the first insertion hole and the second insertion hole to fix the chopper drum in place.

[0012] With this configuration, the chopper drum can be fixed in position relative to the frame by inserting a rod between the first insertion hole formed on the chopper drum side and the second insertion hole formed on the frame side. In this way, the chopper drum can be easily fixed in position using a simple and readily available component, such as a rod.

[0013] In the present invention, it is preferable that the first insertion hole and the second insertion hole are formed in multiple locations around the rotation axis of the chopper drum.

[0014] With this configuration, by inserting multiple rods into each of the multiple first and second insertion holes, it is possible to secure the structure with strong force as a whole, even if the first and second insertion holes are small in diameter.

[0015] In the present invention, the frame is preferably provided with left and right side plates and a motor support plate attached to either of the left or right side plates, and the second insertion hole is formed in the motor support plate.

[0016] According to this configuration, the fixing mechanism can be constructed using the motor support plate provided to support the motor on the side plate. In this way, the fixing mechanism can be constructed with simple modifications by effectively utilizing existing components.

[0017] In the present invention, it is preferable that a bracket for supporting the motor on the frame is provided, and that the second insertion hole is formed in the bracket.

[0018] With this configuration, a fixing mechanism can be constructed using a bracket for supporting the motor on the frame. In this way, a fixing mechanism can be constructed with simple modifications by effectively utilizing existing components. [Brief explanation of the drawing]

[0019] [Figure 1] This is an overall side view of a sugarcane harvesting machine. [Figure 2] It is a side view seen from the left showing the configuration of the conveying device. [Figure 3] It is a side view seen from the left showing the configuration of the rotating body of the conveying device. [Figure 4] It is a side view seen from the right showing the configuration of the conveying device. [Figure 5] It is a diagram showing the support structure of the rotating body of the rotating body unit located at the conveyance end portion. [Figure 6] It is a diagram showing the gear meshing configuration of the rotating body unit located at the conveyance end portion. [Figure 7] It is a side view of the upper gear. [Figure 8] It is a side view of the lower gear. [Figure 9] It is a cross-sectional view of the rotating body unit located at the conveyance end portion. [Figure 10] It is a cross-sectional view showing the tightening structure of the flywheel. [Figure 11] It is a diagram showing the configuration of the fixing mechanism. [Figure 12] It is a view of the fixing mechanism in the fixed state seen from the upper rotating body side. [Figure 13] It is a view of the fixing mechanism in the fixed state seen from the motor support plate side.

Mode for Carrying Out the Invention

[0020] The mode for carrying out the present invention will be described based on the drawings. In the following description, unless otherwise specified, the direction of arrow F in the figure is "front", the direction of arrow B is "rear", the direction of arrow L is "left", the direction of arrow R is "right", the direction of arrow U is "up", and the direction of arrow D is "down".

[0021] 〔Overall Configuration of Sugarcane Harvester〕 As shown in FIG. 1, the body of the sugarcane harvester as a whole is supported by the left and right front wheels 1 as traveling devices and the left and right rear wheels 2 as traveling devices.

[0022] The machine is equipped with a harvesting unit 3, a conveying device 4 positioned in an upward-sloping rearward position, a separation device 5 connected to the rear of the conveying device 4, a discharge conveyor 6 extending upward in an inclined position from below the separation device 5, an operating unit 7 located above and behind the harvesting unit 3, and an engine 8 located behind the operating unit 7.

[0023] With the above configuration, as the machine moves, the cutting blades 11 of the cutting unit 3 cut the base of the crops in the field, and the crops that have been cut by the cutting blades 11 are conveyed upwards and to the rear of the machine by the conveying device 4.

[0024] When the crops reach the end of the conveying device 4, they are shredded at the end of the conveying device 4 and supplied to the separation device 5. The shredded crops pass downwards through the inside of the separation device 5 and fall to the front of the discharge conveyor 6. Inside the separation device 5, sorting air is supplied to the crops, blowing away the waste and separating it before it is discharged.

[0025] Crops that fall to the front of the discharge conveyor 6 are transported upward and backward by the discharge conveyor 6, and are discharged from the discharge section at the rear upper part of the discharge conveyor 6 onto the cargo bed of a transport vehicle (not shown) such as a truck that is running alongside the conveyor for collection.

[0026] [Configuration of the conveying device] Figures 2 to 4 show the conveying device 4. Figure 2 is a side view of the conveying device 4 viewed from the left, showing the left side wall 22. Figure 3 is a side view of the conveying device 4 viewed from the left, similar to Figure 2, but the left side wall 22 is omitted and the right side wall 22 is shown. Figure 4 is a side view of the conveying device 4 viewed from the right, showing the right side wall 22.

[0027] As shown in Figures 2 to 4, the conveying device 4 is provided with left and right side walls 22, and a plurality of lateral connecting bodies 23 are connected across the upper and lower parts of the left and right side walls 22, so that the left and right side walls 22 and the plurality of lateral connecting bodies 23 constitute a box-shaped frame 24.

[0028] As shown in Figure 3, six sets of rotating body units 31, 32, 33, 34, 35, and 36 are supported between the left and right side walls 22. The front of the side wall 22 is connected to the rear of the harvesting unit 3, and the rear of the side wall 22 is connected to the separation device 5 (see Figure 1).

[0029] Each of the rotating body units 31 to 36 has an upper rotating body 31a, 32a, 33a, 34a, 35a, 36a that can rotate around an axis along the left-right direction, and a lower rotating body 31b, 32b, 33b, 34b, 35b, 36b that can rotate around an axis along the left-right direction. The rotating body units 31 to 36 are arranged at intervals along the direction of crop transport.

[0030] The upper rotating bodies 31a to 36a are driven to rotate counterclockwise in Figure 3 by the driving force of the hydraulic motor M, which is the drive source. The lower rotating bodies 31b to 36b are driven to rotate clockwise in Figure 3 by the driving force of the hydraulic motor M, which is the drive source. With this configuration, the upper rotating bodies 31a to 36a and the lower rotating bodies 31b to 36b are driven to rotate in opposite directions to each other.

[0031] With the above configuration, when the base of the crops cut by the cutting unit 3 is supplied to the conveying device 4, the base of the crops is pulled between the upper rotating body 31a and the lower rotating body 31b. The crops are conveyed while being sandwiched between the upper rotating bodies 31a-35a and the lower rotating bodies 31b-35b, with the base of the crop leading the upper part of the crop.

[0032] [Chopper's composition] As shown in Figure 5, the last rotating unit 36 ​​located at the end of the conveying terminal of the conveying device 4 constitutes a chopper CP for cutting crops. As shown in Figures 3 and 5, the upper rotating body 36a (an example of an upper chopper drum) and the lower rotating body 36b (an example of a lower chopper drum) of the pair of rotating bodies 36a and 36b of the last rotating unit 36 ​​have multiple horizontally elongated cutting blades 27 radially connected to the outer circumference of a cylindrical body 25. Three cutting blades 27 are arranged around the outer circumference of the body at equal intervals in the circumferential direction.

[0033] As shown in Figure 9, the upper rotating body 36a and the lower rotating body 36b are provided with clamping members 28 adjacent to the cutting blade 27 in the circumferential direction, for gripping the cut crop and releasing it backward. The clamping members 28 are made of rubber and are configured to release the crop backward by rotating while gripping it with a pair of clamping members 28.

[0034] When the crops reach the end of the conveying device 4, they are sandwiched between the upper rotating body 36a and the lower rotating body 36b, shredded by the cutting blade 27, and then released by the pair of gripping members 28 and supplied to the upper part of the separation device 5.

[0035] The upper cutting blade 27 and the lower cutting blade 27 are positioned to face each other at approximately the same position along the circumferential direction in order to cut crops effectively. However, the upper clamping member 28 and the lower clamping member 28 are positioned offset along the circumferential direction.

[0036] If the upper clamping member 28 and the lower clamping member 28 are set to face each other at approximately the same position along the circumferential direction, there is a greater risk that the clamping member 28 will bend significantly and break when gripping a crop. However, by offsetting their positions along the circumferential direction, the bending of the clamping member 28 when gripping a crop is reduced, thereby improving durability.

[0037] As shown in Figure 2, a hydraulic motor M is supported on the left side wall 22 to drive the upper rotating body 36a and the lower rotating body 36b, respectively, which are provided on the rotating body unit 36 ​​located at the end of the conveying terminal of the conveying device 4. The hydraulic motor M is supported on the left side wall 22 by a motor support plate 43 and a rear bearing mechanism 44 which acts as a bracket.

[0038] The motor support plate 43 is attached to the left side wall 22 and constitutes part of the frame 24. The rear bearing mechanism 44 rotatably supports the respective rotating shaft portions 78 (see Figure 11) of the upper rotating body 36a and the lower rotating body 36b, and also supports the hydraulic motor M. Although not shown in the figures, the output shafts of the two hydraulic motors M and their rotating shaft portions 78 are spline-fitted and connected to the upper rotating body 36a and the lower rotating body 36b.

[0039] As shown in Figures 4 and 5, the gear case 45 is supported by the right side wall 22. As shown in Figures 4 and 6, the gear case 45 houses an upper gear 46 connected to the upper rotating body 36a and a lower gear 47 connected to the lower rotating body 36b. The upper gear 46 and the lower gear 47 are arranged in a meshing configuration.

[0040] As shown in Figure 4, a large-diameter flywheel 48 is connected to the lower gear 47. As shown in Figure 6, the lower gear 47 is configured to mesh with and interlock with a small-diameter intermediate gear 50 attached to the rotating shaft 49 of the flywheel 48. The intermediate gear 50 is housed in the gear case 45 and is connected to the upper part of the lower gear 47 in a meshing manner.

[0041] The rotation axis 49 of the flywheel 48 is located between the rotation axis 51 of the upper gear 46 and the rotation axis 52 of the lower gear 47 in the vertical direction. In this way, in the chopper CP, a large-diameter and heavy flywheel 48 is provided to eliminate rotational unevenness, and the flywheel 48 is positioned as low as possible to lower the center of gravity. The intermediate gear 50 is formed to be smaller in diameter than the lower gear 47, and the flywheel 48 is driven to rotate at a higher speed than the upper rotating body 36a and the lower rotating body 36b.

[0042] As shown in Figure 9, the rotational phases of the upper cutting blade 27 and the lower cutting blade 27 are set so that they face each other at approximately the same position along the circumferential direction in order to cut crops effectively.

[0043] However, when assembling this harvesting machine, assembly errors can cause the upper cutting blade 27 and the lower cutting blade 27 to be misaligned along the circumferential direction. Therefore, the harvesting machine of this embodiment is equipped with a mechanism (phase adjustment mechanism) for adjusting the rotational phase of the upper cutting blade 27 and the lower cutting blade 27 to the correct phase, even after assembly.

[0044] (Mechanism for phase adjustment) I will now explain the mechanism for adjusting the phase. As shown in Figure 7, the upper gear 46 has elongated holes 53 extending along the circumferential direction, and the upper rotating body 36a and the upper gear 46 are connected through these elongated holes 53. The upper gear 46 has multiple elongated holes 53 (eight in the example shown in the figure) spaced apart in the circumferential direction.

[0045] The upper rotating body 36a is positioned on the inner side of the case relative to the upper gear 46. As shown in Figure 6, a circular projection 55 is formed on the side of the upper rotating body 36a that faces the upper gear 46. The upper gear 46 has a circular through hole 56 formed on the radially inward side. The upper gear 46 is mounted on the upper rotating body 36a with the through hole 56 fitting into the outer circumference of the projection 55 of the upper rotating body 36a. When the projection 55 and the through hole 56 are fitted together, the upper gear 46 becomes rotatable around its pivot axis.

[0046] The upper rotating body 36a is positioned axially inward relative to the upper gear 46. A circular hole 57 is formed in the upper rotating body 36a. The circular hole 57 is formed in the upper rotating body 36a at a position corresponding to the elongated hole 53 of the upper gear 46. A female thread is formed in the circular hole 57 into which connecting bolts 58 can be fitted. Multiple bolts 58 are installed through multiple elongated holes 53, and by tightening the bolts 58 via washers (not shown), the upper gear 46 and the upper rotating body 36a are connected in a manner that allows them to be integrated. When fastening the bolts 58, the rotational phase of the upper gear 46 relative to the flange portion 54 can be shifted within the range of the elongated holes 53.

[0047] As shown in Figure 8, a circular hole 59 is formed in the lower gear 47, and the lower rotating body 36b and the lower gear 47 are connected through the circular hole 59. Multiple circular holes 59 are formed at intervals in the circumferential direction. The lower rotating body 36b is positioned on the inside side of the case relative to the lower gear 47, and a circular projection 55 is formed on the side of the lower gear 47, with the circular insertion hole 56 of the lower gear 47 fitting into the outer circumference of the projection 55. This configuration is the same as that of the upper gear 46.

[0048] The lower rotating body 36b has a circular hole 61 formed in a position corresponding to the circular hole 59 of the lower gear 47. The inner surface of the circular hole 61 has a female threaded portion into which a connecting bolt 62 can be fitted. Therefore, the lower gear 47 and the lower rotating body 36b are connected in a fixed phase by fastening a bolt 62 across the circular hole 57 of the lower gear 47 and the circular hole 59 of the flange portion 54 of the lower rotating body 36b.

[0049] With the lower gear 47 and the lower rotating body 36b connected in a fixed position by fastening with bolts 58, when fastening the upper gear 46 and the upper rotating body 36a through multiple elongated holes 53 with multiple bolts 58, the rotational phase of the upper gear 46 relative to the upper flange portion 54 can be shifted within the range of the elongated holes 53, using the rotational phase between the lower gear 47 and the lower rotating body 36b as a reference, thereby adjusting the rotational phase of the upper cutting blade 27 and the lower cutting blade 27 to the appropriate phase.

[0050] Such phase adjustment work can also be performed after the harvesting machine has been assembled. Specifically, as shown in Figure 4, an opening 63 is formed on the side of the gear case 45 at a location corresponding to the upper gear 46, and the opening 63 is normally covered by a cover 64. The cover 64 can be removed by releasing the connecting screws.

[0051] When the cover 64 is removed, the opening 63 is opened. When performing phase adjustment work, the work can be done through the opening 63 after removing the cover 64. That is, this can be done by releasing the tightening of the multiple bolts 58 to change the rotational phase of the upper gear 46 relative to the lower gear 47, and then tightening the multiple bolts 58 again.

[0052] The rearmost rotating unit 36 ​​(chopper CP) may experience a temporary increase in drive load when cutting crops, which can cause uneven rotation. In such cases, the inertial force of the flywheel 48 reduces the uneven rotation, allowing for smooth and continuous cutting. The outer circumference of the flywheel 48 is covered by a wheel cover 65. The wheel cover 65 is detachably held in place by a well-known buckle-type locking mechanism 66.

[0053] When the driving load on the rotating shaft 49 increases rapidly, the flywheel 48 rotates relatively ahead of the rotating shaft 49 via the friction holding mechanism H, and is linked in such a way that no excessive force is applied to the rotating shaft due to inertia.

[0054] As shown in Figure 10, the rotating shaft 49 of the flywheel 48 is rotatably supported in the gear case 45 via a pair of bearings 67. An intermediate gear 50 is integrally provided inside the gear case 45 so as to be integrally rotatable with respect to the rotating shaft 49. The boss portion 68 of the flywheel 48 is integrally rotatably fitted onto the portion of the rotating shaft 49 that protrudes outward from the gear case 45. The flywheel 48 is externally fitted onto the boss portion 68 via a bush 69 so as to be relative to it.

[0055] Friction plates 70 are provided on both sides of the flywheel 48 in the axial direction, and are tightened and fixed from the outside of the flywheel 48 by nuts 73 via a pressing plate 71 and a pressing spring 72. In this way, the friction holding mechanism H is configured. The flywheel 48 is pressed with a predetermined pressure by the friction holding mechanism H. Under normal operating conditions, the rotating shaft 49 and the flywheel 48 rotate as a single unit. However, if an excessive load is applied due to crops or other debris getting caught, the friction holding mechanism H allows the flywheel 48 to rotate against the pressure.

[0056] The pressure exerted by the friction holding mechanism H needs to be adjusted to a predetermined value. Therefore, by tightening the nut 73, the boss portion 68 and the nut 73 are tightened and fixed at the set pressure via the friction plates 70 on both sides. If the pressure changes due to aging, the pressure is adjusted by removing the wheel cover 65 and tightening the nut 73.

[0057] When performing such tightening work, if the upper rotating body 36a and the lower rotating body 36b rotate unintentionally, the tightening work cannot be performed properly. Therefore, in the sugarcane harvester according to this embodiment, a fixing mechanism K is provided that can fix the position of the upper rotating body 36a and the lower rotating body 36b relative to the frame 24 in order to prevent the rotation of the upper rotating body 36a and the lower rotating body 36b.

[0058] (Fixing mechanism) Let me explain the fixing mechanism K. The fixing mechanism K includes a first insertion hole 75 formed on the lower rotating body 36b side and a second insertion hole 76 formed on the frame 24 side, and is configured such that a rod is inserted through the first insertion hole 75 and the second insertion hole 76 to fix the position of the lower rotating body 36b. Multiple first insertion holes 75 and second insertion holes 76 are formed around the rotation axis of the lower rotating body 36b.

[0059] As shown in Figure 11, three first insertion holes 75 are formed on the outer circumference of the right flange portion 54 of the lower rotating body 36b, spaced apart in the circumferential direction. The first insertion holes 75 are formed in such a way that the flange portion 54 is inserted through them along the axial direction. An opening 77 is formed in the left side wall 22, which is approximately the same size as the outer shape of the flange portion 54.

[0060] The motor support plate 43, which together with the left and right side walls 22 constitutes the frame 24 of the conveying device 4, is fixed to the left side wall 22 by being connected to the left side wall 22 by multiple bolts on its outer circumference. The motor support plate 43 has shaft insertion holes 79 through which the rotating shafts 78 of the upper rotating body 36a and the lower rotating body 36b are inserted. In addition, the motor support plate 43 has three second insertion holes 76 at locations corresponding to the three first insertion holes 75 formed in the flange portion 54 of the lower rotating body 36b.

[0061] The rear bearing mechanism 44, which is connected to the motor support plate 43 by multiple bolts, has notches 80 for bolt insertion formed at locations corresponding to the three second insertion holes 76. The notches 80 correspond to the second insertion holes 76 formed in the rear bearing mechanism 44.

[0062] When adjusting the pressure provided by the friction holding mechanism H, first, the rotational position of the lower rotating body 36b is adjusted so that the three first insertion holes 75 formed in the flange portion 54 of the lower rotating body 36b and the three second insertion holes 76 formed in the motor support plate 43 overlap.

[0063] Then, as shown in Figures 12 and 13, a metal rod is inserted across the overlapping first insertion hole 75 and second insertion hole 76. As the metal rod, a metal tool, such as a steel rod-shaped tool like a ratchet wrench LE, can be used. In addition, other metal rods can be used as well.

[0064] The fixing mechanism K can fix the position of the lower rotating body 36b to prevent its rotation. At this time, the rotation of the lower rotating body 36b, the upper rotating body 36a, and the flywheel 48 is prevented by the meshing of the gears, so that the pressure by the friction holding mechanism H can be adjusted while preventing unexpected rotation.

[0065] [Another embodiment] (1) In the above embodiment, a second insertion hole 76 (fixed insertion hole) is formed in the motor support plate 43 and a notch 80 is formed in the rear bearing mechanism 44. However, instead of this configuration, a configuration in which the second insertion hole 76 is formed only in the motor support plate 43 is also acceptable. In this case, the second insertion hole 76 is formed radially outward from the outer circumference of the rear bearing mechanism 44. Alternatively, a configuration in which the second insertion hole 76 is formed only in the rear bearing mechanism 44 is also acceptable. In this case, the rear bearing mechanism 44 may be directly attached to the side wall 22 without using the motor support plate 43.

[0066] (2) In the above embodiment, three first insertion holes 75 and two second insertion holes 76 are formed around the rotation axis of the lower rotating body 36b (chopper drum), but the number is not limited to three; two or four or more may be formed. Furthermore, the number is not limited to multiple insertion holes; only one first insertion hole 75 and one second insertion hole 76 may be formed.

[0067] (3) In the above embodiment, the fixing mechanism K is configured such that a first insertion hole 75 is formed on the lower rotating body 36b (chopper drum) side and a second insertion hole 76 is formed on the frame 24 side, and a rod is inserted through the first insertion hole 75 and the second insertion hole 76 to fix the rotation of the lower rotating body 36b (chopper drum). However, the fixing mechanism K is not limited to this configuration, and various configurations can be adopted for the fixing mechanism K, such as fixing by locking devices that extend between the support members that support the cutting blades 27 of the upper rotating body 36a and the lower rotating body 36b and engage with each of them, or fixing by pressing against the outer surface of the flywheel 48, or fixing by using a fixing member that engages with a locking part formed on the flywheel 48 to fix the rotation.

[0068] (4) In the above embodiment, the clamping force of the flywheel 48 on the rotating shaft 49 is adjustable, but a configuration without such an adjustment mechanism is also possible.

[0069] (5) In the above embodiment, a phase adjustment mechanism is provided to adjust the rotational phase of the upper cutting blade 27 and the lower cutting blade 27 to an appropriate phase, but a configuration without such a mechanism is also possible. [Industrial applicability]

[0070] This invention can be applied to sugarcane harvesters. [Explanation of symbols]

[0071] 4. Conveying device 22 Side panels 24 frames 36b Rotating Unit (Chopper Drum) 44 Rear bearing mechanism (bracket) 75 First insertion hole 76 Second insertion hole K fixing mechanism M Motor

Claims

1. It is equipped with a conveying device that transports the crops harvested from the field toward the rear of the machine. The aforementioned transport device is Frame and, A chopper drum supported by the frame so as to be rotatable about an axis along the left-right direction, A motor that rotates the chopper drum, A sugarcane harvester comprising a fixing mechanism capable of fixing the chopper drum in position relative to the frame in order to prevent the chopper drum from rotating.

2. The sugarcane harvester according to claim 1, wherein the fixing mechanism comprises a first insertion hole formed on the chopper drum side and a second insertion hole formed on the frame side, and a rod is inserted through the first insertion hole and the second insertion hole to fix the chopper drum in place.

3. The sugarcane harvester according to claim 2, wherein the first insertion hole and the second insertion hole are formed in multiple locations around the rotation axis of the chopper drum.

4. The frame is provided with left and right side plates and a motor support plate attached to either of the left or right side plates. The sugarcane harvester according to claim 2, wherein the motor support plate has the second insertion hole formed therein.

5. The frame is provided with a bracket that supports the motor, The sugarcane harvester according to claim 2, wherein the bracket has the second insertion hole formed therein.

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