Efficient split type threshing cylinder speed change gear box

Abstract

The invention relates to the technical field of speed change gear boxes, and discloses an efficient split type threshing cylinder speed change gear box which solves the problem that at present, a threshing cylinder and a speed change gear box are inconvenient to quickly connect, the efficient split type threshing cylinder speed change gear box comprises a speed change gear box body, an output shaft is arranged on the speed change gear box body, and a transmission shaft is arranged on the outer side of the speed change gear box body; a connecting mechanism is arranged between the transmission shaft and the output shaft, a ventilation mechanism and a collection mechanism are arranged at the top of the speed change gear box body, the connecting mechanism comprises a mounting shaft fixed to the end, close to the transmission shaft, of the output shaft, and the end, away from the output shaft, of the mounting shaft is attached to the end, close to the output shaft, of the transmission shaft; the end, away from the output shaft, of the installation shaft is fixedly connected with a positioning block, and the end, close to the output shaft, of the transmission shaft is provided with a positioning groove. According to the invention, the transmission shaft is firmly connected with the mounting shaft, so that the threshing cylinder is quickly connected with the speed change gear box.

Description

Technical Field

[0001] The invention belongs to the technical field of speed change gear boxes, and in particular relates to a high-efficiency split-type threshing drum speed change gear box. Background Art

[0002] A variable speed gearbox, also known as a gearbox, is a device used in mechanical equipment to change the output speed, output torque or transmission direction. In threshing machinery, the main function of the variable speed gearbox is to adjust the speed of the threshing drum to meet the threshing needs of different crops, different humidity and different maturity conditions. By adjusting the transmission ratio of the variable speed gearbox, the drum speed can be accurately controlled, thereby optimizing the threshing effect.

[0003] In the prior art, the threshing drum and the speed gear box are generally firmly connected together by fasteners such as a flange and a plurality of bolts, which requires multiple operations, making it inconvenient to quickly connect the threshing drum and the speed gear box. Summary of the invention

[0004] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a high-efficiency split threshing drum speed change gear box, which effectively solves the problem that it is currently inconvenient to quickly connect the threshing drum with the speed change gear box.

[0005] To achieve the above object, the present invention provides the following technical solutions: a high-efficiency split threshing drum speed change gear box, comprising a speed change gear box housing, an output shaft is arranged on the speed change gear box housing, a transmission shaft is arranged on the outer side of the speed change gear box housing, a connecting mechanism is arranged between the transmission shaft and the output shaft, and a ventilation mechanism and a collection mechanism are arranged on the top of the speed change gear box housing;

[0006] The connecting mechanism includes a mounting shaft fixed to one end of the output shaft near the transmission shaft, an end of the mounting shaft away from the output shaft is fitted with an end of the transmission shaft near the output shaft, and an end of the mounting shaft away from the output shaft is fixedly connected to a positioning block, an end of the transmission shaft near the output shaft is provided with a positioning groove, the positioning block is inserted into the positioning groove, the outer side of the transmission shaft is fixedly sleeved with a mounting ring, the outer side of the mounting shaft is fixedly sleeved with an outer ring, the outer side of the mounting ring is symmetrically rotatably connected with two L-shaped plates, the two L-shaped plates are provided with rollers that fit with one side of the outer ring away from the mounting ring, the outer sides of the two L-shaped plates are fixedly connected to a limiting cylinder, the side of the outer ring away from the mounting ring is symmetrically fixedly connected with two side rods, the two L-shaped plates are respectively abutted with the two side rods, the ends of the two side rods away from the outer ring are fixedly connected with side blocks, a movable ring is movably sleeved between the two side rods, and the side of the movable ring close to the outer ring is symmetrically fixedly connected with two limiting columns, the two limiting columns are respectively inserted into the two limiting cylinders, and the two limiting columns are respectively abutted with the two L-shaped plates.

[0007] Preferably, the outer side of the installation shaft is provided with an external thread, and a screw barrel is threadedly sleeved on the outer side of the installation shaft through the external thread, a turntable is fixedly connected to the outer side of the screw barrel, a movable ring is located between the screw barrel and the outer ring, and a plurality of installation columns are fixedly connected at equal angles on one side of the screw barrel close to the movable ring, and a ball bearing that fits the movable ring is installed on the end of each installation column away from the screw barrel.

[0008] Preferably, the mounting ring is symmetrically fixedly connected to two side plates on one side close to the outer ring, slots are provided on the sides of the two side plates close to each other, and the two side plates pass through the outer ring, and the outer ring is symmetrically fixedly connected to two side frames on one side away from the mounting ring, the two side frames are respectively sleeved on the outer sides of the two side plates, a guide column is fixedly connected between the two side frames, the guide column passes through the mounting shaft, and two guide blocks are symmetrically and movably sleeved on the outer sides of the guide columns, the mounting shaft is located between the two guide blocks, and the two guide blocks are fixedly connected to plug blocks on one side away from the outer ring, and the two plug blocks are respectively inserted into the two slots.

[0009] Preferably, one side of the movable ring close to the outer ring is symmetrically rotatably connected to two movable rods, and one end of the two movable rods away from the movable ring is rotatably connected to two guide blocks respectively.

[0010] Preferably, the ventilation mechanism includes a ventilation box fixed to the top of the speed gear box body, two guide plates are symmetrically fixedly connected to the inside of the ventilation box, a filter plate located on the outside of the ventilation box is fixedly connected between the two guide plates, and two baffles are symmetrically fixedly connected to the outside of the ventilation box, and the filter plate and the two guide plates are located between the two baffles.

[0011] Preferably, an inner plate is provided inside the ventilation box, and the inner plate and the filter plate are arranged parallel to each other. A plurality of dredging rods are evenly and fixedly connected to one side of the inner plate close to the filter plate. The outer diameter of the dredging rods is equal to the inner diameter of the filter holes on the filter plate, and the dredging rods correspond to the filter holes one by one.

[0012] Preferably, a cross bar is fixedly connected between the two guide plates and the ventilation box, connecting plates are movably sleeved on the outer sides of the two cross bars, an inner plate is fixed between the two connecting plates, and reset springs are fixedly connected on the outer sides of the two connecting plates, one end of the two reset springs are respectively fixedly connected to the two guide plates, and the two reset springs are respectively sleeved on the outer sides of the two cross bars, a U-shaped round rod is fixedly connected between the two connecting plates, and the U-shaped round rod passes through the two guide plates and is movably connected to the two guide plates.

[0013] Preferably, the collecting mechanism includes a top frame fixed to the top of the speed change gear box body, the top frame is located below the filter plate, a drawer is provided inside the top frame, a sealing plate is movably installed inside the top frame, the sealing plate is located above the drawer, a sleeve plate is fixedly connected to the top of the sealing plate, and the sleeve plate is fixedly sleeved on the outer side of the U-shaped round rod.

[0014] Preferably, two limiting grooves are symmetrically provided inside the top frame, a limiting plate is slidably connected between the two limiting grooves, the blocking plate is fixedly connected to the limiting plate, and the side of the blocking plate away from the limiting plate extends to the outside of the top frame.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The present invention facilitates the positioning of the installation shaft and the transmission shaft through the cooperation between the positioning groove and the positioning block, and facilitates the limiting of the installation shaft and the transmission shaft through the cooperation between the installation ring and the L-shaped plate and the outer ring and the roller, and facilitates the sliding of the movable ring along the two side rods through the cooperation between the external thread and the screw barrel and the installation column and the ball, so that the two limiting columns can be respectively inserted into the two limiting barrels to prevent the two L-shaped plates from moving, and then the installation shaft and the transmission shaft can be connected and fixed, and through the cooperation between the movable ring and the movable rod and the guide block and the guide column, the two insert blocks can be respectively inserted into the two slots, and then the installation ring and the outer ring can be fixed, so that the transmission shaft and the installation shaft are firmly connected, thereby facilitating the rapid connection of the threshing drum and the speed change gear box.

[0017] 2. The invention facilitates heat dissipation inside the speed gear box through the cooperation between the ventilation box and the baffle, as well as the filter plate and the guide plate, while preventing foreign matter from entering the speed gear box. The cooperation between the U-shaped round rod and the connecting plate, as well as the cross bar and the inner plate facilitates movement of the dredging rod to dredge the filter holes on the filter plate, thereby facilitating cleaning of the filter plate to prevent it from getting clogged.

[0018] 3. The invention achieves cooperation between the U-shaped round rod and the connecting plate as well as the cross rod and the inner plate. When the dredging rod moves to dredge the filter holes on the filter plate, the sleeve plate drives the sealing plate to move to open the opening on the top of the top frame, so that the cleaned impurities fall into the drawer, thereby facilitating the collection of the impurities. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0020] In the attached picture:

[0021] Figure 1 It is a schematic diagram of the structure of the high-efficiency split threshing drum speed-changing gearbox of the present invention;

[0022] Figure 2 It is a schematic diagram of the structure of the connecting mechanism of the present invention;

[0023] Figure 3 This is a schematic diagram of the mounting ring structure of the present invention;

[0024] Figure 4This is a schematic diagram of the shaft installation structure of the present invention;

[0025] Figure 5 It is a schematic diagram of the side frame structure of the present invention;

[0026] Figure 6 It is a schematic diagram of the structure of the ventilation mechanism of the present invention;

[0027] Figure 7 It is a schematic diagram of the cross-sectional structure of the ventilation box of the present invention;

[0028] Figure 8 It is a schematic diagram of the structure of the collecting mechanism of the present invention;

[0029] Fig. 9 It is a schematic diagram of the disassembled structure of the sealing plate and the top frame of the present invention.

[0030] In the figure: 1, speed change gear box housing; 2, connecting mechanism; 201, mounting shaft; 202, mounting ring; 203, outer ring; 204, positioning groove; 205, limiting cylinder; 206, roller; 207, slot; 208, side plate; 209, L-shaped plate; 2010, side frame; 2011, movable rod; 2012, movable ring; 2013, screw cylinder; 2014, external thread; 2015, turntable; 2016, side block; 2017, mounting column; 2018, ball bearing; 2019, side rod; 2020, positioning block; 20 21. Insert block; 2022. Guide block; 2023. Guide column; 2024. Limit column; 3. Ventilation mechanism; 301. Ventilation box; 302. Baffle; 303. U-shaped round rod; 304. Filter plate; 305. Guide plate; 306. Clearing rod; 307. Inner plate; 308. Cross bar; 309. Connecting plate; 3010. Reset spring; 4. Collecting mechanism; 401. Top frame; 402. Drawer; 403. Sleeve plate; 404. Sealing plate; 405. Limiting groove; 406. Limiting plate; 5. Output shaft; 6. Transmission shaft. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0032] Embodiment 1, by Figure 1-Figure 9The present invention relates to a high-efficiency split threshing drum speed gearbox, comprising a speed gearbox housing 1, an output shaft 5 is provided on the speed gearbox housing 1, a transmission shaft 6 is provided on the outer side of the speed gearbox housing 1, the transmission shaft 6 is arranged at the center of the threshing drum, and the threshing drum can be driven to rotate when the transmission shaft 6 rotates, a connecting mechanism 2 is provided between the transmission shaft 6 and the output shaft 5, and a ventilation mechanism 3 and a collecting mechanism 4 are provided on the top of the speed gearbox housing 1.

[0033] Embodiment 2, on the basis of embodiment 1, the connecting mechanism 2 includes a mounting shaft 201 fixed to one end of the output shaft 5 close to the transmission shaft 6, the end of the mounting shaft 201 away from the output shaft 5 is in contact with the end of the transmission shaft 6 close to the output shaft 5, the end of the mounting shaft 201 away from the output shaft 5 is fixedly connected with a positioning block 2020, the end of the transmission shaft 6 close to the output shaft 5 is provided with a positioning groove 204, the positioning block 2020 is inserted into the positioning groove 204, the outer side of the transmission shaft 6 is fixedly sleeved with a mounting ring 202, the outer side of the mounting shaft 201 is fixedly sleeved with an outer ring 203, the outer side of the mounting ring 202 is symmetrically rotatably connected with two L-shaped plates 209, and the two L-shaped plates 209 are provided with rollers 2 in contact with the side of the outer ring 203 away from the mounting ring 202 06, the outer sides of the two L-shaped plates 209 are fixedly connected to the limiting cylinder 205, the side of the outer ring 203 away from the mounting ring 202 is symmetrically fixedly connected with two side rods 2019, the two L-shaped plates 209 are respectively abutted with the two side rods 2019, the ends of the two side rods 2019 away from the outer ring 203 are fixedly connected with side blocks 2016, a movable ring 2012 is movably sleeved between the two side rods 219, and the side of the movable ring 2012 close to the outer ring 203 is symmetrically fixedly connected with two limiting columns 2024, the two limiting columns 2024 are respectively inserted into the two limiting cylinders 205, and the two limiting columns 2024 are respectively abutted with the two L-shaped plates 209, the outer side of the mounting shaft 201 is provided with an external thread 2014, and the mounting shaft 201 The outer side is threadedly sleeved with a screw barrel 2013 through an external thread 2014, and a turntable 2015 is fixedly connected to the outer side of the screw barrel 2013. The movable ring 2012 is located between the screw barrel 2013 and the outer ring 203. A plurality of mounting posts 2017 are fixedly connected at equal angles on the side of the screw barrel 2013 close to the movable ring 2012. A ball 2018 that fits the movable ring 2012 is installed on the end of each mounting post 2017 away from the screw barrel 2013. Two side plates 208 are symmetrically fixedly connected to the side of the mounting ring 202 close to the outer ring 203. A slot 207 is provided on the side of the two side plates 208 close to each other, and the two side plates 208 both penetrate the outer ring 203. Two side plates 208 are symmetrically fixedly connected to the side of the outer ring 203 away from the mounting ring 202. Side frame 2010, two side frames 2010 are respectively sleeved on the outer sides of two side plates 208, a guide column 2023 is fixedly connected between the two side frames 2010, the guide column 2023 passes through the installation shaft 201, and two guide blocks 2022 are symmetrically and movably sleeved on the outer sides of the guide column 2023, the installation shaft 201 is located between the two guide blocks 2022, and the two guide blocks 2022 are fixedly connected with plug blocks 2021 on the side away from the outer ring 203, and the two plug blocks 2021 are respectively inserted into the two slots 207, and the movable ring 2012 is symmetrically and rotatably connected to the side close to the outer ring 203 with two movable rods 2011, and the ends of the two movable rods 2011 away from the movable ring 2012 are respectively rotatably connected to the two guide blocks 2022;

[0034] First, one end of the installation shaft 201 is abutted against one end of the transmission shaft 6, so that the positioning block 2020 is inserted into the positioning groove 204, and the two side plates 208 are both inserted through the outer ring 203, and the two side frames 2010 are respectively sleeved on the outside of the two side plates 208, and then the two L-shaped plates 209 are rotated until they are respectively abutted against the two side rods 2019, and the two rollers 206 are both located on the outer ring 203, and then the turntable 2015 is rotated clockwise to drive the screw barrel 2013 to rotate. Since the screw barrel 2013 is threadedly sleeved on the outside of the installation shaft 201 through the external thread 2014, the screw barrel 2013 moves horizontally while rotating and passes through the installation column 201 7 and the ball 2018 drive the movable ring 2012 to slide along the two side rods 2019, and the two limit columns 2024 move horizontally and are respectively inserted into the two limit tubes 205, and at the same time, the two movable rods 2011 respectively drive the two guide blocks 2022 to slide along the guide columns 2023, and drive the two insert blocks 2021 to move until they are respectively inserted into the two slots 207, connect and fix the mounting ring 202 with the outer ring 203, and fix the transmission shaft 6 with the mounting shaft 201, and at the same time, the two limit columns 2024 are respectively abutted against the two L-shaped plates 209, further fixing the transmission shaft 6 with the mounting shaft 201, and finally realizing the quick connection between the threshing drum and the speed change gear box.

[0035] Embodiment 3, on the basis of embodiment 1, the ventilation mechanism 3 includes a ventilation box 301 fixed to the top of the speed change gear box housing 1, two guide plates 305 are symmetrically fixedly connected inside the ventilation box 301, a filter plate 304 located on the outside of the ventilation box 301 is fixedly connected between the two guide plates 305, two baffle plates 302 are symmetrically fixedly connected to the outside of the ventilation box 301, the filter plate 304 and the two guide plates 305 are both located between the two baffle plates 302, an inner plate 307 is provided inside the ventilation box 301, the inner plate 307 and the filter plate 304 are arranged parallel to each other, a plurality of dredging rods 306 are evenly fixedly connected to one side of the inner plate 307 close to the filter plate 304, and the outer diameter value of the dredging rod 306 is equal to the outer diameter value of the filter plate 3 04, and the dredging rod 306 corresponds to the filter hole one by one, a cross bar 308 is fixedly connected between the two guide plates 305 and the ventilation box 301, and the outer sides of the two cross bars 308 are movably sleeved with connecting plates 309, the inner plate 307 is fixed between the two connecting plates 309, and the outer sides of the two connecting plates 309 are fixedly connected with reset springs 3010, one end of the two reset springs 3010 is fixedly connected to the two guide plates 305, and the two reset springs 3010 are respectively sleeved on the outer sides of the two cross bars 308, and a U-shaped round rod 303 is fixedly connected between the two connecting plates 309, and the U-shaped round rod 303 passes through the two guide plates 305 and is movably connected to the two guide plates 305;

[0036] First, the ventilation box 301 is fixed on the top of the speed change gear box body 1 to facilitate the discharge of heat inside the speed change gear box body 1 from the ventilation box 301. At the same time, a filter plate 304 is set to prevent external dust from entering the speed change gear box body 1. When the U-shaped round rod 303 is pulled, the two connecting plates 309 are driven to slide along the two cross bars 308 respectively. At this time, the two return springs 3010 are compressed and drive the inner plate 307 to move close to the filter plate 304. At the same time, the dredging rod 306 moves to dredge the filter holes on the filter plate 304. When the dredging is completed, the U-shaped round rod 303 is released again. At this time, the two return springs 3010 are reset and drive the two connecting plates 309 to slide along the two cross bars 308 respectively. At the same time, the inner plate 307 moves to make the dredging rod 306 move out of the filter holes on the filter plate 304. Finally, the filter plate 304 is cleaned to prevent it from being blocked.

[0037] Embodiment 4, on the basis of embodiment 1, the collecting mechanism 4 includes a top frame 401 fixed to the top of the speed change gear box housing 1, the top frame 401 is located below the filter plate 304, a drawer 402 is provided inside the top frame 401, a blocking plate 404 is movably installed inside the top frame 401, the blocking plate 404 is located above the drawer 402, a sleeve plate 403 is fixedly connected to the top of the blocking plate 404, the sleeve plate 403 is fixedly sleeved on the outer side of the U-shaped round rod 303, two limiting grooves 405 are symmetrically provided inside the top frame 401, a limiting plate 406 is slidably connected between the two limiting grooves 405, the blocking plate 404 is fixedly connected to the limiting plate 406, and the side of the blocking plate 404 away from the limiting plate 406 extends to the outer side of the top frame 401;

[0038] When the U-shaped round rod 303 is pulled to drive the clearing rod 306 to move, the sealing plate 404 is driven to move horizontally through the sleeve plate 403 to open the opening on the top of the top frame 401. When the clearing rod 306 moves to the filter hole on the filter plate 304, the impurities blocked in the filter hole fall into the drawer 402. Finally, the drawer 402 is pulled out to collect and process the impurities.

Claims

1. A high-efficiency split threshing drum speed change gear box, comprising a speed change gear box body (1), characterized in that: The speed change gear box housing (1) is provided with an output shaft (5), the outer side of the speed change gear box housing (1) is provided with a transmission shaft (6), a connection mechanism (2) is provided between the transmission shaft (6) and the output shaft (5), and the top of the speed change gear box housing (1) is provided with a ventilation mechanism (3) and a collection mechanism (4); The connection mechanism (2) comprises a mounting shaft (201) fixed to one end of the output shaft (5) close to the transmission shaft (6); one end of the mounting shaft (201) away from the output shaft (5) is in contact with one end of the transmission shaft (6) close to the output shaft (5); one end of the mounting shaft (201) away from the output shaft (5) is fixedly connected to a positioning block (2020); one end of the transmission shaft (6) close to the output shaft (5) is provided with a positioning groove (204); the positioning block (2020) is inserted into the positioning groove (204); the outer side of the transmission shaft (6) is fixedly sleeved with a mounting ring (202); the outer side of the mounting shaft (201) is fixedly sleeved with an outer ring (203); the outer side of the mounting ring (202) is symmetrically rotatably connected to two L-shaped plates (209); the two L-shaped plates (209) are provided with a positioning groove (2020) which is away from the mounting ring (203) and is connected to the outer ring (203). 02), the outer sides of the two L-shaped plates (209) are fixedly connected to the limiting cylinder (205), the side of the outer ring (203) away from the mounting ring (202) is symmetrically fixedly connected to two side rods (219), the two L-shaped plates (209) are respectively abutted against the two side rods (219), the ends of the two side rods (219) away from the outer ring (203) are fixedly connected to side blocks (2016), a movable ring (2012) is movably sleeved between the two side rods (219), and the side of the movable ring (2012) close to the outer ring (203) is symmetrically fixedly connected to two limiting columns (2024), the two limiting columns (2024) are respectively inserted into the two limiting cylinders (205), and the two limiting columns (2024) are respectively abutted against the two L-shaped plates (209).

2. The high-efficiency split threshing drum speed change gear box according to claim 1 is characterized in that: The outer side of the installation shaft (201) is provided with an external thread (2014), the outer side of the installation shaft (201) is threadedly sleeved with a screw barrel (2013) through the external thread (2014), the outer side of the screw barrel (2013) is fixedly connected with a turntable (2015), the movable ring (2012) is located between the screw barrel (2013) and the outer ring (203), a plurality of installation columns (2017) are fixedly connected at equal angles on one side of the screw barrel (2013) close to the movable ring (2012), and a ball (2018) that fits the movable ring (2012) is installed on one end of each installation column (2017) away from the screw barrel (2013).

3. The high-efficiency split threshing drum speed change gear box according to claim 1, characterized in that: The mounting ring (202) is symmetrically fixedly connected to one side of the outer ring (203) with two side plates (208), and the two side plates (208) are provided with slots (207) on the sides close to each other, and the two side plates (208) penetrate the outer ring (203), and the outer ring (203) is symmetrically fixedly connected to one side of the mounting ring (202) away from the mounting ring (202) with two side frames (210), and the two side frames (210) are respectively sleeved on the outer sides of the two side plates (208). A guide column (2023) is fixedly connected between the guide column (2023) and the mounting shaft (201), the guide column (2023) passes through the mounting shaft (201), two guide blocks (2022) are symmetrically and movably sleeved on the outer side of the guide column (2023), the mounting shaft (201) is located between the two guide blocks (2022), and the two guide blocks (2022) are fixedly connected to the sides away from the outer ring (203) with plug blocks (2021), and the two plug blocks (2021) are respectively inserted into the two slots (207).

4. The high-efficiency split threshing drum speed change gear box according to claim 1, characterized in that: One side of the movable ring (2012) close to the outer ring (203) is symmetrically rotatably connected to two movable rods (2011), and one end of the two movable rods (2011) away from the movable ring (2012) is rotatably connected to two guide blocks (2022) respectively.

5. The high-efficiency split threshing drum speed change gear box according to claim 1, characterized in that: The ventilation mechanism (3) comprises a ventilation box (301) fixed to the top of the speed change gear box housing (1); two guide plates (305) are symmetrically fixedly connected inside the ventilation box (301); a filter plate (304) located outside the ventilation box (301) is fixedly connected between the two guide plates (305); two baffles (302) are symmetrically fixedly connected to the outside of the ventilation box (301); the filter plate (304) and the two guide plates (305) are both located between the two baffles (302).

6. The high-efficiency split threshing drum speed change gear box according to claim 5, characterized in that: An inner plate (307) is provided inside the ventilation box (301), and the inner plate (307) and the filter plate (304) are arranged parallel to each other. A plurality of dredging rods (306) are evenly and fixedly connected to one side of the inner plate (307) close to the filter plate (304), and the outer diameter of the dredging rods (306) is equal to the inner diameter of the filter holes on the filter plate (304), and the dredging rods (306) correspond to the filter holes one by one.

7. The high-efficiency split threshing drum speed change gear box according to claim 5, characterized in that: A cross bar (308) is fixedly connected between the two guide plates (305) and the ventilation box (301); a connecting plate (309) is movably sleeved on the outer sides of the two cross bars (308); an inner plate (307) is fixed between the two connecting plates (309); a return spring (3010) is fixedly connected on the outer sides of the two connecting plates (309); one end of the two return springs (3010) is respectively fixedly connected to the two guide plates (305); and the two return springs (3010) are respectively sleeved on the outer sides of the two cross bars (308); a U-shaped round rod (303) is fixedly connected between the two connecting plates (309); the U-shaped round rod (303) passes through the two guide plates (305) and is movably connected to the two guide plates (305).

8. The high-efficiency split threshing drum speed change gear box according to claim 1, characterized in that: The collecting mechanism (4) comprises a top frame (401) fixed to the top of the speed change gear box body (1); the top frame (401) is located below the filter plate (304); a drawer (402) is provided inside the top frame (401); a blocking plate (404) is movably installed inside the top frame (401); the blocking plate (404) is located above the drawer (402); a sleeve plate (403) is fixedly connected to the top of the blocking plate (404); and the sleeve plate (403) is fixedly sleeved on the outside of the U-shaped round rod (303).

9. The high-efficiency split threshing drum speed change gearbox according to claim 8, characterized in that: Two limiting grooves (405) are symmetrically arranged inside the top frame (401), a limiting plate (406) is slidably connected between the two limiting grooves (405), the blocking plate (404) is fixedly connected to the limiting plate (406), and a side of the blocking plate (404) away from the limiting plate (406) extends to the outside of the top frame (401).

Images