Rice husker with variable speed gear shifting driving function

Abstract

The present invention belongs to the technical field of agricultural machinery, and in particular, relates to a rice husker with a speed-changing and shifting driving function. The present invention provides a rice husker with a speed-changing and shifting driving function, and its structural components include a driving motor, a fixed rubber roller, a movable rubber roller, a blanking plate, a spline shaft, a double gear, a driving wheel unit, a driven wheel unit, a tension wheel unit, a fixed shaft, and a shift fork, so that: only one transmission belt is passed between the driving wheel unit and the driven wheel unit, so that the linear speed of the movable rubber roller can be greater than or less than the speed-changing effect of the fixed rubber roller, and the fixed rubber roller and the movable rubber roller can be worn synchronously as much as possible and replaced together.

Description

Technical Field

[0001] The invention belongs to the technical field of agricultural machinery, and in particular relates to a rice husker with a speed-changing gear-shifting driving function. Background Art

[0002] The function of the rice husker is to husk the rice. The principle is roughly as follows: a rice husking gap is formed between two rubber rollers with a linear speed difference. The width of the gap is relatively small. When the rice passes through the gap, the rubber rollers can grind off the husks on it, ultimately achieving the purpose of husking.

[0003] On the other hand, for the two rubber rollers, the rubber roller with a relatively large linear speed wears out significantly faster than the other one. Therefore, in order to make the utilization rate of the two rubber rollers higher, the replacement cycle longer, and the use more convenient, the common coping method is to change the speed of the rubber rollers.

[0004] The principle of this function is generally: alternately set the two rubber rollers as a combination of one fast and one slow, so that the wear speed of the two rubber rollers is roughly the same, and finally replaced together, which is both efficient and convenient. Therefore, correspondingly, for the above-mentioned rice husker with a variable speed shift drive function, one of its necessary structures is a variable speed shift structure to ensure that the rice husker has the function of balancing the wear speed of the rubber rollers.

[0005] For example, a Chinese utility model patent with authorization announcement number CN219502825U and authorization announcement date 2023.08.11 discloses a dual-speed rice husker, comprising: a frame, the frame including side panels; a tensioning wheel for tensioning a transmission belt connecting an outer roller pulley, a motor pulley, and a fixed roller pulley; a tensioning wheel mounting structure for mounting the tensioning wheel is provided on the side panel, the tensioning wheel mounting structure comprising a gantry fixedly connected to the side panel, and a cantilever shaft provided on the gantry for mounting the tensioning wheel.

[0006] The dual-speed rice husker in this utility model patent has the word "dual speed" corresponding to the above-mentioned variable speed gear shifting drive function, and its general advantages are as follows: the cantilever shaft of the tensioning wheel corresponding to the outer roller pulley is shorter, which is not easy to cause rigid deformation of the cantilever shaft, greatly reducing the heating of the tensioning wheel and the heating and jamming of the bearing, making the failure rate of the dual-speed rice husker lower.

[0007] However, in actual use, the dual-speed rice husker still has at least the following disadvantages, which are also the technical problems to be solved by the present invention, namely:

[0008] The speed change structure includes two transmission belts, which increases the complexity of the speed change structure and the structure of the entire rice husker, resulting in greatly increased use and maintenance costs of the rice husker.

[0009] Therefore, in summary, there is an urgent need for a new type of rice husker whose speed change structure includes only one transmission belt, so that the speed change gear shifting and rubber roller wear speed balancing functions can be realized simply and efficiently. Summary of the invention

[0010] The invention provides a rice husker with a speed-changing and shifting driving function, the structural components of which include a driving motor, a fixed rubber roller, a movable rubber roller, a blanking plate, a spline shaft, a double gear, a driving wheel unit, a driven wheel unit, a tension wheel unit, a fixed shaft, and a shifting fork, so that: only one transmission belt is passed between the driving wheel unit and the driven wheel unit, so that the speed-changing effect of the linear speed of the movable rubber roller being greater than or less than that of the fixed rubber roller can be achieved, and the fixed rubber roller and the movable rubber roller can be worn synchronously as much as possible and replaced together.

[0011] The technical solution adopted by the present invention to solve the above-mentioned problem is: a rice husker with a speed-changing and shifting driving function, the structure of which includes a driving motor, a fixed rubber roller, a movable rubber roller, and a blanking plate, and also includes a spline shaft arranged on the driving motor and used to install the fixed rubber roller, a double gear arranged on the spline shaft and used to adjust the rotation speed of the movable rubber roller, a driving wheel unit meshing with the double gear, a driven wheel unit connected to the driving wheel unit through a transmission belt and used to install the movable rubber roller, a tensioning wheel unit arranged on the transmission belt, a fixed shaft for sleeved on the driven wheel unit and the tensioning wheel unit, and a shift fork for sliding the double gear on the spline shaft.

[0012] A further preferred technical solution is that the driving wheel unit includes a driving shaft, a driving wheel arranged on the driving shaft and used to connect with the driven wheel unit, and two gears arranged on the driving shaft and selected to mesh with the double gears.

[0013] A further preferred technical solution is that the driven wheel unit includes a driven wheel connected to the driving wheel through a transmission belt, a mounting shaft with the driven wheel and a movable rubber roller respectively connected at both ends, a support ring sleeved on the fixed shaft, a support plate arranged on the support ring, and an adjustment ring arranged on the support plate and sleeved on the mounting shaft.

[0014] A further preferred technical solution is that the tensioning wheel unit includes a mounting ring sleeved on the fixed shaft, a connecting plate arranged on the mounting ring, a movable ring arranged on the connecting plate, a rotating shaft plugged on the movable ring, and a tensioning wheel arranged on the rotating shaft and the transmission belt.

[0015] A further preferred technical solution is that the tensioning wheel unit further includes a lifting cylinder arranged on the rotating shaft.

[0016] A further preferred technical solution is that: a telescopic cylinder is also provided on the shift fork.

[0017] A further preferred technical solution is that the driven wheel unit further comprises a cylinder for replenishing the thickness of the rubber roller, which is arranged on the adjusting ring and is used for being on the fixed rubber roller close to the movable rubber roller.

[0018] A further preferred technical solution is that a compensating bracket unit connected to the cylinder for supplementing the thickness of the rubber roller is also provided on the inclined lower surface of the blanking plate.

[0019] A further preferred technical solution is that the compensating bracket unit includes a fixed orifice plate, a rotating rod arranged on the fixed orifice plate, a driving plate arranged on the rotating rod, a connecting rod arranged on the driving plate and connected to the cylinder for replenishing the thickness of the rubber roller, and a rotatable compensation block sleeved on the rotating rod and used to support the inclined lower surface of the blanking plate.

[0020] A further preferred technical solution is that when the movable rubber roller is worn due to the relatively large linear speed, the cylinder for replenishing the rubber roller thickness first approaches the movable rubber roller on the fixed rubber roller, and the rotatable compensation block then rotates on the rotating rod, thereby lifting the unloading plate upward, so that the unloading plate is realigned with the rice husking gap formed between the fixed rubber roller and the movable rubber roller. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the present invention.

[0022] Figure 2 It is a schematic diagram of the position structure of the driving wheel unit in the present invention.

[0023] Figure 3 It is a schematic diagram of the position structure of the driven wheel unit in the present invention.

[0024] Figure 4 It is a schematic diagram of the position structure of the tensioning wheel unit in the present invention.

[0025] Figure 5 It is a schematic diagram of the position structure of the shift fork in the present invention.

[0026] Figure 6 It is a schematic diagram of the positions of the cylinder for supplementing the thickness of the rubber roller and the cylinder for lifting it in the present invention.

[0027] Figure 7 It is a schematic diagram of the position structure of the compensating bracket unit in the present invention.

[0028] Figure 8In the present invention, when the movable rubber roller is worn due to a relatively large linear speed, the movable rubber roller needs to be close to the fixed rubber roller, but the unloading plate does not need to move, otherwise, the unloading plate is located at an incorrect unloading position and cannot be fully aligned with the rice husking gap.

[0029] Fig. 9 In the present invention, when the fixed rubber roller is worn due to the relatively large linear speed, the movable rubber roller needs to be close to the fixed rubber roller together with the unloading plate so that the unloading plate is located at the correct unloading position and fully aligned with the rice husking gap.

[0030] Fig.10 The figure is a schematic diagram of the position of the driving motor in the whole rice husker of the present invention.

[0031] Fig.11 It is a schematic diagram of the position structure of the integrated gear housing in the present invention.

[0032] In the figure, the meanings of the symbols are as follows:

[0033] The worn position of the rubber roller a, the wrong feeding position b, the unchanged gap position of the rice husker c, the correct feeding position d, and the changed gap position of the rice husker e;

[0034] A driving motor 11, a fixed rubber roller 12, a movable rubber roller 13, a blanking plate 14, a gearbox housing 15, a rice husking chamber housing 16, and a discharging chamber housing 17;

[0035] Spline shaft 1, duplex gear 2, driving wheel unit 3, driven wheel unit 4, tension wheel unit 5, fixed shaft 6, shift fork 7, telescopic cylinder 8, compensating bracket unit 9, integrated gear housing 10;

[0036] Driving shaft 301, driving wheel 302, gear 303;

[0037] Driven wheel 401, mounting shaft 402, support ring 403, support plate 404, adjustment ring 405, cylinder 406 for replenishing the thickness of the rubber roller;

[0038] A mounting ring 501, a connecting plate 502, a movable ring 503, a rotating shaft 504, a tensioning wheel 505, and a lifting cylinder 506;

[0039] Fixed orifice plate 901 , rotating rod 902 , driving plate 903 , connecting rod 904 , and rotatable compensation block 905 . DETAILED DESCRIPTION

[0040] The following descriptions are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention.

[0041] As attached Figure 1-11As shown, a rice husker with a variable speed shifting driving function comprises a driving motor 11, a fixed rubber roller 12, a movable rubber roller 13, and a blanking plate 14, and also comprises a spline shaft 1 arranged on the driving motor 11 and used to install the fixed rubber roller 12, a double gear 2 arranged on the spline shaft 1 and used to adjust the rotation speed of the movable rubber roller 13, a driving wheel unit 3 meshing with the double gear 2, a driven wheel unit 4 connected to the driving wheel unit 3 through a transmission belt and used to install the movable rubber roller 13, a tensioning wheel unit 5 arranged on the transmission belt, a fixed shaft 6 for sleeved the driven wheel unit 4 and the tensioning wheel unit 5, and a shift fork 7 for sliding the double gear 2 on the spline shaft 1.

[0042] In this embodiment, the driving motor 11, the spline shaft 1, the double gear 2, the driving wheel unit 3, the driven wheel unit 4, the tensioning wheel unit 5, the fixed shaft 6, and the shift fork 7 together constitute the gearbox structure of the rice husker, the ultimate goal of which is to allow the fixed rubber roller 12 and the movable rubber roller 13 to wear alternately due to excessive linear speed, and finally ensure that the two rubber rollers are worn out together.

[0043] The method for realizing the wear speed balancing function of the rubber roller of the rice husker is as follows: the double gear 2 includes two gears, one large and one small, and the driving wheel unit 3 also includes two gears, one large and one small, and the large gear of the former is meshed with the small gear of the latter, or the small gear of the former is meshed with the large gear of the latter, either of which is selected. This enables the driving motor 11 to realize a relatively slow and relatively fast two-speed shift on the movable rubber roller 13, and finally ensures that the fixed rubber roller 12 and the movable rubber roller 13 can alternately become "fast roller, wear roller", and finally the two rubber rollers are worn out and exhausted roughly synchronously and replaced together, making the rubber roller replacement operation of the rice husker more convenient and efficient.

[0044] On the other hand, the fixed rubber roller 12 is directly connected to the driving motor 11 through the spline shaft 1, so that the rotation speed of the fixed rubber roller 12 can be set to be constant. This setting method has at least the following two advantages:

[0045] First, there is no need to set a transmission belt between the driving motor 11 and the fixed rubber roller 12, so that the rice husker can achieve the above-mentioned "double-speed" effect and balance the wear speed of the two rubber rollers through only one driving motor and one transmission belt, which can greatly reduce the failure rate of the rice husker;

[0046] Second, after setting the fixed rubber roller 12 to a constant speed, the problem of how the fixed rubber roller 12 and the movable rubber roller 13 alternately become "fast rollers" is simplified to how to make the rotation speed of the movable rubber roller 13 greater than or less than that of the fixed rubber roller 12. This is very clear and simple, and greatly reduces the difficulty of the operation mode of the rice husker.

[0047] The only one, or one group of transmission belts mentioned above is wound around the driving wheel unit 3, the driven wheel unit 4 and the tensioning wheel unit 5, all of which are located inside the transmission belt, and the outline shape of the transmission belt is a triangle.

[0048] In addition, the spline shaft 1 and the driving wheel unit 3 are plugged into the integrated gear housing 10, the integrated gear housing 10 is installed on the frame of the rice husker, and the fixed shaft 6 is directly plugged into the frame of the rice husker, for example, plugged into one or all of the two rice husker chamber shells 16, so that the gearbox structure has been stably installed on the rice husker. At this time, the gearbox and the rice husker chamber are connected as a whole, that is, the rice husker chamber shell 16 on one side is shared, which makes the rice husker have the advantages of compact structure and small size.

[0049] In addition, during the use of the rice husker, the driven wheel unit 4 needs to bring the movable rubber roller 13 together and approach the fixed rubber roller 12 at intervals and multiple times until both rubber rollers are worn out. During this period, each time the movable rubber roller 13 approaches the fixed rubber roller 12, the tensioning wheel unit 5 needs to be readjusted, that is, the transmission belt is re-tensioned, which requires the tensioning wheel unit 5 and the driven wheel unit 4 to be rotated and adjusted.

[0050] The fixed shaft 6 is simultaneously plugged into the tensioning wheel unit 5 and the driven wheel unit 4, serving as the rotation center of the latter two, which can also greatly simplify the structural complexity of the rice husker.

[0051] The driving wheel unit 3 includes a driving shaft 301 , a driving wheel 302 disposed on the driving shaft 301 and used to connect with the driven wheel unit 4 , and two gears 303 disposed on the driving shaft 301 and selectively used to mesh with the double gear 2 .

[0052] In this embodiment, the operation of the double gear 2 selectively meshing with one of the gears 303 is completed by the shift fork 7 in combination with the synchronizer and / or the inverter, so that the tooth collision phenomenon is avoided as much as possible during the process of releasing and establishing the meshing state.

[0053] Specifically, for example, the larger gear of the dual gear 2 is closer to the drive motor 11 than the smaller gear, and the two gears 303, one large and one small, are arranged in the opposite manner, that is, the smaller gear is closer to the drive motor 11. When the large gear of the dual gear 2 meshes with the smaller gear 303, the rotation speed of the movable rubber roller 13 is faster than that of the fixed rubber roller 12, and the former enters the wear stage, while the wear speed of the latter can be ignored.

[0054] The driven wheel unit 4 includes a driven wheel 401 connected to the driving wheel 302 via a transmission belt, a mounting shaft 402 whose two ends are respectively connected to the driven wheel 401 and the movable rubber roller 13, a support ring 403 sleeved on the fixed shaft 6, a support plate 404 arranged on the support ring 403, and an adjustment ring 405 arranged on the support plate 404 and sleeved with the mounting shaft 402.

[0055] In this embodiment, the support ring 403 , the support plate 404 and the adjustment ring 405 are integrally formed. After force is applied to the adjustment ring 405 , the installation shaft 402 can be rotated and displaced, and the ultimate goal is to move the fixed rubber roller 12 closer to the movable rubber roller 13 .

[0056] The tensioning wheel unit 5 includes a mounting ring 501 sleeved on the fixed shaft 6, a connecting plate 502 arranged on the mounting ring 501, a movable ring 503 arranged on the connecting plate 502, a rotating shaft 504 inserted on the movable ring 503, and a tensioning wheel 505 arranged on the rotating shaft 504 and the transmission belt.

[0057] In this embodiment, the mounting ring 501 , the connecting plate 502 and the movable ring 503 are also integrally formed, and the mounting ring 501 and the supporting ring 403 are both axially fixed on the fixed shaft 6 , and the two do not interfere with each other.

[0058] The conveyor belt is wound around the driving wheel 302, the driven wheel 401 and the tensioning wheel 505 to form a triangular outline. Figure 2 As shown, although the conveyor belt is omitted in the figure, it is clear that:

[0059] First, in order for the driven wheel 401 to be close to the movable rubber roller 13 on the fixed rubber roller 12, its rotational displacement direction is the clockwise direction in the figure, and the center of the circle is the fixed shaft 6;

[0060] Second, in order to tension the conveyor belt, the driven wheel 401 rotates in the counterclockwise direction in the figure, and the center of the circle is also the fixed axis 6.

[0061] At this point, the rice hulling operation with the rubber roller wear speed balancing function can be carried out effectively until both rubber rollers are completely worn out.

[0062] It should be noted that:

[0063] The rotation of the driven wheel unit 4 and the tension wheel unit 5 around the fixed shaft 6 is performed at intervals, and each rotation operation has the characteristics of short duration and small rotation angle, during which the driving motor 11 does not need to be shut down.

[0064] The tensioning wheel unit 5 further includes a lifting cylinder 506 disposed on the rotating shaft 504 .

[0065] In this embodiment, the lifting cylinder 506 is one of the ways to effectively rotate the entire tensioning wheel unit 5. The lifting cylinder 506 can also be replaced by a motor, a hydraulic cylinder, etc.

[0066] The shift fork 7 is also provided with a telescopic cylinder 8 .

[0067] In this embodiment, the telescopic cylinder 8 is installed on the cover of the integrated gear housing 10, and is used to reciprocate the shift fork 7, which is inserted between a large and a small gear of the double gear 2, ultimately enabling the telescopic cylinder 8 to have a dual-speed shifting function.

[0068] The driven wheel unit 4 further includes a rubber roller thickness supplementing cylinder 406 which is arranged on the adjusting ring 405 and is used for being located on the fixed rubber roller 12 close to the movable rubber roller 13 .

[0069] In this embodiment, the rubber roller thickness supplement cylinder 406, like the telescopic cylinder 8 and the lifting cylinder 506, can be replaced by existing common displacement actuators such as motors.

[0070] The rubber roller thickness supplement cylinder 406 and the lifting cylinder 506 are both hingedly mounted on the gearbox housing 15. The usage of the two is slightly different, and the difference at least includes:

[0071] The relatively stationary part of the driven wheel unit 4 is the adjusting ring 405, whose mounting shaft 402 needs to rotate, while the relatively stationary parts of the driving wheel unit 3 are the movable ring 503 and the rotating shaft 504. Therefore, the cylinder 406 for replenishing the thickness of the rubber roller can only be hinged on the adjusting ring 405, while the lifting cylinder 506 can be hinged on the movable ring 503 and can be sleeved on the rotating shaft 504. Figure 6 The latter is fine.

[0072] In addition, it is important to note that:

[0073] First, the word "rotate" of the rotating shaft 504 means that it needs to rotate and displace around the fixed shaft 6, rather than rotating itself;

[0074] Second, when the wear of the rubber roller accumulates to a large extent, that is, the rice husking gap is too wide, the rubber roller thickness supplement cylinder 406 is first driven and adjusted until the distance between the two rubber rollers is reduced to the appropriate width of the rice husking gap, and then the lifting cylinder 506 is driven to re-tighten the transmission belt that has been slightly loosened at this time.

[0075] A compensating bracket unit 9 connected to the rubber roller thickness supplementing cylinder 406 is also provided on the inclined lower surface of the blanking plate 14 .

[0076] In this embodiment, the function of the compensating bracket unit 9 is to ensure that the action of the movable rubber roller 13 approaching the fixed rubber roller 12 and the requirement of the blanking plate 14 aligning with the rice husking gap have both efficient linkage characteristics and practical compensation functions.

[0077] The reason is that when the movable rubber roller 13 is worn, the position of the rice husking gap remains unchanged, and the position of the blanking plate 14 remains unchanged; when the fixed rubber roller 12 is worn, the position of the rice husking gap changes and moves appropriately downward. At this time, the blanking plate 14 also needs to be appropriately moved downward or swung downward so that the blanking plate 14 is still aligned with the rice husking gap. For details, please refer to the attached Figure 8 and 9 .

[0078] The compensating bracket unit 9 includes a fixed orifice plate 901, a rotating rod 902 arranged on the fixed orifice plate 901, a driving plate 903 arranged on the rotating rod 902, a connecting rod 904 arranged on the driving plate 903 and connected to the cylinder 406 for replenishing the thickness of the rubber roller, and a rotatable compensation block 905 which is sleeved on the rotating rod 902 and is used to support the inclined lower surface of the blanking plate 14.

[0079] In this embodiment, the fixed orifice plate 901 is installed on the outer shell 16 of the husking chamber, and the connecting rod 904 is hinged on the adjusting ring 405 like the cylinder 406 for replenishing the thickness of the rubber roller.

[0080] At this point, the rubber roller thickness supplement cylinder 406 pushes the movable rubber roller 13 toward the fixed rubber roller 12, that is: pushes the connecting rod 904, rotates the driving plate 903, rotates the rotating rod 902, and finally droops the rotatable compensation block 905, so that the blanking plate 14 can move downward or swing down, and then the blanking plate 14 can be realigned with the new rice husking gap.

[0081] When the movable rubber roller 13 is worn due to the relatively large linear speed, the rubber roller thickness replenishing cylinder 406 first approaches the movable rubber roller 13 on the fixed rubber roller 12, and then the rotatable compensation block 905 rotates on the rotating rod 902, thereby pushing up the unloading plate 14, so that the unloading plate 14 is realigned with the rice husking gap formed between the fixed rubber roller 12 and the movable rubber roller 13.

[0082] In this embodiment, when the movable rubber roller 13 is worn, the position of the rice husking gap does not change, and remains at a slightly oblique upper position of the unworn fixed rubber roller 12, as shown in the attached figure. Figure 1 , 8 At this time, the rotatable compensation block 905 needs to be rotated upward again to compensate for the downward movement of the blanking plate 14 caused by its previous drooping action.

[0083] Among them, it should be noted that:

[0084] First, the rotatable compensation block 905 is sleeved with the rotating rod 902, and the sleeve clamping strength is relatively large. When the rice is put down and rolled down on the blanking plate 14, it is difficult to press down the rotatable compensation block 905, so that it rotates spontaneously relative to the rotating rod 902;

[0085] Second, when the movable rubber roller 13 is worn and the rotatable compensation block 905 needs to be rotated and raised to compensate for the downward movement of the blanking plate 14, the above-mentioned rotation and raising operation can be completed manually. At this time, the rotating rod 902 cannot be rotated accidentally, and the required force is relatively large;

[0086] Third, the rotating rod 902 is provided with two rotatable compensation blocks 905 for always stably supporting the blanking plate 14.

[0087] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various modifications can be made within the knowledge of ordinary technicians in the technical field without departing from the purpose of the present invention. These are all non-creative modifications and are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A rice husker with a variable speed gear shifting driving function, comprising a driving motor (11), a fixed rubber roller (12), a movable rubber roller (13), and a blanking plate (14), characterized in that: It also includes a spline shaft (1) arranged on the driving motor (11) and used to mount the fixed rubber roller (12), a double gear (2) arranged on the spline shaft (1) and used to adjust the rotation speed of the movable rubber roller (13), a driving wheel unit (3) meshing with the double gear (2), a driven wheel unit (4) connected to the driving wheel unit (3) via a transmission belt and used to mount the movable rubber roller (13), a tensioning wheel unit (5) arranged on the transmission belt, a fixed shaft (6) for sleeve-engaging the driven wheel unit (4) and the tensioning wheel unit (5), and a shift fork (7) for sliding the double gear (2) on the spline shaft (1). The driving wheel unit (3) comprises a driving shaft (301), a driving wheel (302) arranged on the driving shaft (301) and used to connect to the driven wheel unit (4), and two gears (303) arranged on the driving shaft (301) and one of which is used to mesh with the double gear (2). The driven wheel unit (4) comprises a driven wheel (401) connected to the driving wheel (302) via a transmission belt, a mounting shaft (402) having two ends respectively connected to the driven wheel (401) and a movable rubber roller (13), a support ring (403) sleeved on the fixed shaft (6), a support plate (404) disposed on the support ring (403), and an adjustment ring (405) disposed on the support plate (404) and sleeved on the mounting shaft (402). The driven wheel unit (4) further comprises a rubber roller thickness replenishing cylinder (406) which is arranged on the adjusting ring (405) and is used for replenishing the thickness of the rubber roller on the fixed rubber roller (12) close to the movable rubber roller (13). A compensating bracket unit (9) connected to the rubber roller thickness supplementing cylinder (406) is also provided on the inclined lower surface of the blanking plate (14). The compensating bracket unit (9) comprises a fixed orifice plate (901), a rotating rod (902) arranged on the fixed orifice plate (901), a driving plate (903) arranged on the rotating rod (902), a connecting rod (904) arranged on the driving plate (903) and connected to the cylinder (406) for replenishing the thickness of the rubber roller, and a rotatable compensating block (905) sleeved on the rotating rod (902) and used to support the inclined lower surface of the blanking plate (14). When the movable rubber roller (13) is worn due to the relatively high linear speed, the rubber roller thickness replenishment cylinder (406) first approaches the movable rubber roller (13) on the fixed rubber roller (12), and the rotatable compensation block (905) then rotates on the rotating rod (902), thereby lifting the unloading plate (14) upward, so that the unloading plate (14) is realigned with the rice husking gap formed between the fixed rubber roller (12) and the movable rubber roller (13).

2. A rice husker with a variable speed gear shifting driving function according to claim 1, characterized in that: The tensioning wheel unit (5) comprises a mounting ring (501) sleeved on the fixed shaft (6), a connecting plate (502) arranged on the mounting ring (501), a movable ring (503) arranged on the connecting plate (502), a rotating shaft (504) plugged on the movable ring (503), and a tensioning wheel (505) arranged on the rotating shaft (504) and the transmission belt.

3. A rice husker with a variable speed gear shifting driving function according to claim 2, characterized in that: The tension wheel unit (5) further comprises a lifting cylinder (506) arranged on the rotating shaft (504).

4. The rice husker with a variable speed gear shifting driving function according to claim 1, characterized in that: The shift fork (7) is also provided with a telescopic cylinder (8).

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