Low-vibration split-type threshing cylinder variable speed gear box

Abstract

The application relates to the technical field of variable speed gearboxes, and discloses a low-vibration split-type threshing cylinder variable speed gearbox, which solves the problem that repeated adjustment of gear engagement can easily cause gear abrasion, and comprises a variable speed gearbox body, a cover is hingedly connected to the top of the variable speed gearbox body, a variable speed adjusting mechanism and a dustproof mechanism are arranged on the variable speed gearbox body, a transmission shaft is arranged on the outer side of the variable speed gearbox body, a connecting mechanism is arranged between the transmission shaft and the variable speed gearbox body, the variable speed gearbox body comprises an output shaft rotatably connected to the inside of the variable speed gearbox body, one end of the output shaft extends to the outside of the variable speed gearbox body, two intermediate shafts are rotatably connected to the inside of the variable speed gearbox body in a symmetrical mode, an intermediate small gear and an intermediate large gear are fixedly arranged on the outer sides of the two intermediate shafts; the application can realize variable speed of the output shaft, so that repeated adjustment of gear engagement is not needed, and gear abrasion is avoided.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of variable speed gearboxes, and particularly relates to a low-vibration split-type threshing cylinder variable speed gearbox. BACKGROUND

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

[0003] At present, most of the gearboxes on the market are engaged by gears of different sizes to achieve different rotational efficiencies. However, repeated adjustment of the gear engagement can easily cause gear wear, leading to damage of the gearbox. SUMMARY

[0004] To overcome the defects of the prior art, the application provides a low-vibration split-type threshing cylinder variable speed gearbox, which effectively solves the problem of repeated adjustment of gear engagement causing gear wear.

[0005] To achieve the above-mentioned purpose, the application provides the following technical scheme: a low-vibration split-type threshing cylinder variable speed gearbox, comprising a variable speed gearbox housing, a lid hingedly connected to the top of the variable speed gearbox housing, a variable speed adjustment mechanism and a dustproof mechanism provided on the variable speed gearbox housing, a transmission shaft provided on the outer side of the variable speed gearbox housing, and a connecting mechanism provided between the transmission shaft and the variable speed gearbox housing.

[0006] The variable speed gearbox housing comprises an output shaft rotatably connected to the inside of the variable speed gearbox housing, the output shaft extending to the outside of the variable speed gearbox housing at one end, two intermediate shafts symmetrically rotatably connected to the inside of the variable speed gearbox housing, an intermediate small gear and an intermediate large gear fixedly installed on the outer sides of the two intermediate shafts, an input shaft rotatably connected to the inside of the variable speed gearbox housing, the input shaft extending to the outside of the variable speed gearbox housing at one end and fixedly installed with a driving motor, an L-shaped seat fixedly connected to the driving motor, the L-shaped seat being fixed to the outside of the variable speed gearbox housing, the two intermediate shafts being located between the output shaft and the input shaft, an input large gear and an input small gear fixedly installed on the outer side of the input shaft, the input large gear being engagedly connected with the intermediate small gear, and the input small gear being engagedly connected with the intermediate large gear.

[0007] Preferably, the outer side of the output shaft is movably sleeved with an outer cylinder, the outer side of the outer cylinder is fixedly provided with two upper transmission gears in a symmetrical manner, the outer side of the output shaft is provided with two limiting grooves in a symmetrical manner, the inner side of the outer cylinder is fixedly connected with two limiting blocks in a symmetrical manner, the two limiting blocks are slidably connected with the two limiting grooves respectively, the outer side of the outer cylinder is sleeved with a sleeve ring, the sleeve ring is not in contact with the outer cylinder, the outer side of the sleeve ring is fixedly connected with a support plate located between the two intermediate shafts, the outer side of the support plate is rotatably connected with two side shafts in a symmetrical manner, the outer side of each of the two side shafts is fixedly provided with a lower transmission gear, the two lower transmission gears are meshedly connected with the two upper transmission gears respectively, and the ends of the two side shafts away from each other are fixedly connected with a square block.

[0008] Preferably, the outer side of the outer cylinder is movably sleeved with two outer rings in a symmetrical manner, the sleeve ring is located between the two outer rings, the two sides of the sleeve ring are fixedly connected with a plurality of fixed rods at equal angles, and the ends of the fixed rods away from the sleeve ring are each provided with a ball abutting against the outer ring.

[0009] Preferably, the inside of the transmission gear box body is fixedly connected with a guide column, the outer side of the guide column is movably sleeved with a guide plate, the guide plate is fixed to the outer side of the support plate, the top of the guide plate is fixedly connected with a top plate, the side of the top plate away from the guide plate extends to the outer side of the transmission gear box body, the outer side of the transmission gear box body is fixedly provided with a mounting block, the mounting block is sleeved on the outer side of the top plate, the mounting block is provided with a bolt, the top of the top plate is provided with two screw holes, the mounting block is located between the two screw holes, and the two screw holes are matched with the bolt.

[0010] Preferably, the dustproof mechanism comprises a fixed frame fixed to the outer side of the transmission gear box body, the transmission gear box body is provided with a heat dissipation opening, the fixed frame is arranged at the heat dissipation opening, the inside of the fixed frame is movably sleeved with a movable frame, the inside of the movable frame is fixedly provided with a dustproof frame, and the dustproof frame is uniformly provided with a plurality of filter holes.

[0011] Preferably, the inside of the movable frame is fixedly connected with two inner blocks in a symmetrical manner, the two inner blocks are each fixedly connected with a side rod, the ends of the two side rods are each fixedly connected with a side block, the inside of the heat dissipation opening is fixedly connected with two side plates in a symmetrical manner, the two side rods pass through the two side plates respectively and are movably connected with the two side plates respectively, the two side plates are each fixedly connected with a return spring, the ends of the two return springs are each fixedly connected with a side block, the two return springs are each sleeved on the outer side of the side rod, the two side plates are fixedly connected with a fixed plate therebetween, the side of the fixed plate close to the dustproof frame is uniformly fixedly connected with a plurality of dredging rods, the dredging rods are in one-to-one correspondence with the filter holes, and the outer diameter value of the dredging rod is equal to the inner diameter value of the filter hole.

[0012] Preferably, the connecting mechanism comprises a screw rod fixed to one end of the output shaft, a positioning frame fixed to the end of the screw rod away from the output shaft, and a positioning block fixed to the end of the transmission shaft close to the screw rod, the positioning block being inserted into the positioning frame.

[0013] Preferably, an installation disc is fixed to the outer side of the transmission shaft, two recesses are symmetrically arranged on the installation disc, two shafts are rotatably connected to the inner sides of the two recesses, two L-shaped plates are fixed to the outer sides of the two shafts, two insertion holes are arranged on the two L-shaped plates, two abutting rollers are symmetrically arranged on the outer side of the positioning frame, and the two L-shaped plates respectively abut against the two abutting rollers.

[0014] Preferably, two L-shaped round rods are symmetrically fixed between the positioning frame and the transmission gear box body, an abutting ring is movably sleeved between the two L-shaped round rods, the abutting ring is sleeved on the outer side of the screw rod and does not contact the screw rod, two insertion rods are symmetrically fixed to the side of the abutting ring away from the positioning frame, the outer diameter of the two insertion rods is equal to the inner diameter of the two insertion holes, a screw cylinder is threadedly sleeved on the outer side of the screw rod, and the screw cylinder is located between the positioning frame and the abutting ring.

[0015] Compared with the prior art, the present application has the following advantages:

[0016] 1. According to the present application, the input large gear and the input small gear are driven to rotate by the cooperation between the driving motor and the input shaft, the two intermediate shafts are rotated by the cooperation between the input large gear, the input small gear, the intermediate small gear and the intermediate large gear, the support plate and the sleeve ring are moved by the cooperation between the guide column and the guide plate, one of the blocks is inserted into the corresponding square groove, and the support plate and the sleeve ring are fixed after moving by the cooperation between the top plate, the mounting block, the bolt and the screw hole, so that the output shaft can be changed in speed without repeatedly adjusting the gear engagement, thereby avoiding gear wear.

[0017] 2. According to the present application, the transmission gear box body is cooled by the cooperation between the fixed frame, the heat dissipation opening, the dustproof frame and the filter hole, dust is prevented from entering the transmission gear box body, the dustproof frame is moved and abuts against the fixed plate by the cooperation between the side plate, the inner block, the side rod and the return spring, the dredging rod is inserted into the filter hole, and the filter hole is dredged to prevent blockage, thereby facilitating cleaning of the filter hole.

[0018] 3. The application facilitates the connection of the transmission shaft and the output shaft through the cooperation between the positioning block and the positioning frame, and facilitates the insertion of the two insertion rods into the two insertion holes through the cooperation between the mounting disc and the L-shaped plate, the abutting ring and the L-shaped round rod, and can limit the abutting ring through the cooperation between the screw rod and the screw cylinder, thereby fixing and adjusting the rotating speed of the threshing drum through the transmission shaft and the output shaft, so that the speed change gear box body and the threshing drum are designed in a split type, facilitating disassembly and maintenance. BRIEF DESCRIPTION OF DRAWINGS

[0019] The accompanying drawings are included to provide a further understanding of the application, and constitute a part of the specification, illustrate the application, and are used to explain the application, and do not constitute a limitation on the application.

[0020] In the drawings:

[0021] Figure 1 The structure of the low-vibration split-type threshing drum speed change gear box of the application is shown schematically.

[0022] Figure 2 The disassembly structure of the speed change gear box body and the box cover of the application is shown schematically.

[0023] Figure 3 The structure of the speed change adjusting mechanism of the application is shown schematically.

[0024] Figure 4 The structure of the sleeve ring of the application is shown schematically.

[0025] Figure 5 The structure of the guide column of the application is shown schematically.

[0026] Figure 6 The structure of the dustproof mechanism of the application is shown schematically.

[0027] Figure 7 The structure of the movable frame of the application is shown schematically.

[0028] Figure 8 The structure of the connecting mechanism of the application is shown schematically.

[0029] Figure 9 The structure of the mounting disc of the application is shown schematically.

[0030] In the figure: 1, variable speed gear box body; 2, variable speed adjusting mechanism; 201, output shaft; 202, limiting groove; 203, collar; 204, square groove; 205, guide column; 206, intermediate pinion; 207, input gear; 208, input shaft; 209, intermediate shaft; 2010, input pinion; 2011, driving motor; 2012, L-shaped seat; 2013, intermediate gear; 2014, fixed rod; 2015, ball; 2016, outer ring; 2017, upper transmission gear; 2018, lower transmission gear; 2019, side shaft; 2020, square block; 2021, support plate; 2022, limiting block; 2023, outer cylinder; 2024, guide plate; 2025, mounting block; 2026, bolt; 2027, screw hole; 2028, top plate; 3, dustproof mechanism; 301, fixed frame; 302, movable frame; 303, dustproof frame; 304, filter hole; 305, inner block; 306, side plate; 307, return spring; 308, fixed plate; 309, dredging rod; 3010, side block; 3011, side rod; 4, connecting mechanism; 401, screw rod; 402, abutting ring; 403, abutting roller; 404, positioning frame; 405, mounting disc; 406, screw cylinder; 407, insertion rod; 408, L-shaped round rod; 409, rotating shaft; 4010, L-shaped plate; 4011, positioning block; 4012, insertion hole; 4013, groove; 5, box cover; 6, transmission shaft. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0032] Embodiment one, by Figures 1-9 The present application relates to a low-vibration split-type threshing cylinder variable speed gear box, comprising a variable speed gear box body 1, a rubber pad is arranged at the bottom of the variable speed gear box body 1, the variable speed gear box body 1 is fixed on the base through the rubber pad, which can effectively absorb and reduce the vibration generated during the operation of the variable speed gear box body 1, a box cover 5 is hingedly connected to the top of the variable speed gear box body 1, a variable speed adjusting mechanism 2 and a dustproof mechanism 3 are arranged on the variable speed gear box body 1, a transmission shaft 6 is arranged on the outer side of the variable speed gear box body 1, a connecting mechanism 4 is arranged between the transmission shaft 6 and the variable speed gear box body 1, and the transmission shaft 6 is arranged at the center of the threshing cylinder, so that the threshing cylinder can be rotated to separate when the transmission shaft 6 rotates.

[0033] In embodiment two, on the basis of embodiment one, the transmission gearbox body 1 comprises an output shaft 201 rotatably connected in the transmission gearbox body 1, one end of the output shaft 201 extends to the outside of the transmission gearbox body 1, two intermediate shafts 209 are rotatably connected in the transmission gearbox body 1, the outside of the two intermediate shafts 209 is fixedly installed with an intermediate pinion 206 and an intermediate gear 2013 respectively, an input shaft 208 is rotatably connected in the transmission gearbox body 1, one end of the input shaft 208 extends to the outside of the transmission gearbox body 1 and is fixedly installed with a driving motor 2011, an L-shaped seat 2012 is fixedly connected on the driving motor 2011, the L-shaped seat 2012 is fixed on the outside of the transmission gearbox body 1, the two intermediate shafts 209 are located between the output shaft 201 and the input shaft 208, the outside of the input shaft 208 is fixedly installed with an input gear 207 and an input pinion 2010, the input gear 207 is in meshing connection with the intermediate pinion 206, and the input pinion 2010 is in meshing connection with the intermediate gear 2013, the outside of the output shaft 201 movably sleeves an outer cylinder 2023, the outside of the outer cylinder 2023 is fixedly installed with two upper transmission gears 2017 symmetrically, the outside of the output shaft 201 is provided with two limiting grooves 202 symmetrically, the inside of the outer cylinder 2023 is fixedly connected with two limiting blocks 2022 symmetrically, the two limiting blocks 2022 are in sliding connection with the two limiting grooves 202 respectively, through the cooperation between the limiting block 2022 and the limiting groove 202, the outer cylinder 2023 and the output shaft 201 can rotate simultaneously, the outside of the outer cylinder 2023 sleeves a sleeve ring 203, the sleeve ring 203 does not contact with the outer cylinder 2023, the outside of the sleeve ring 203 is fixedly connected with a support plate 2021 located between the two intermediate shafts 209, the outside of the support plate 2021 is rotatably connected with two side shafts 2019 symmetrically, the outside of the two side shafts 2019 is fixedly installed with a lower transmission gear 2018 respectively, the two lower transmission gears 2018 are in meshing connection with the two upper transmission gears 2017 respectively, the ends of the two side shafts 2019 away from each other are fixedly connected with a square block 2020 respectively, the ends of the two intermediate shafts 209 close to each other are provided with a square groove 204 respectively, the two square grooves 204 are matched with the square block 2020 respectively, the outside of the outer cylinder 2023 is fixedly sleeved with two outer rings 2016 symmetrically, the sleeve ring 203 is located between the two outer rings 2016, the two sides of the sleeve ring 203 are fixedly connected with a plurality of fixed rods 2014 at equal angles, the ends of the fixed rods 2014 away from the sleeve ring 203 are installed with a ball 2015 matched with the outer ring 2016, a plurality of balls 2015 are arranged between the sleeve ring 203 and the outer ring 2016, so as to avoid the direct contact between the sleeve ring 203 and the outer ring 2016, thereby facilitating the rotation of the outer cylinder 2023 and the outer ring 2016, a guide column 205 is fixedly connected in the transmission gearbox body 1, the outside of the guide column 205 movably sleeves a guide plate 2024, the guide plate 2024 is fixed on the outside of the support plate 2021, the top of the guide plate 2024 is fixedly connected with a top plate 2028,The top plate 2028 extends to the outside of the variable speed gear box body 1 away from the side of the guide plate 2024, the variable speed gear box body 1 is fixedly installed with a mounting block 2025, the mounting block 2025 is sleeved on the outside of the top plate 2028, the mounting block 2025 is provided with a bolt 2026, the top of the top plate 2028 is provided with two screw holes 2027, the mounting block 2025 is located between the two screw holes 2027, and the two screw holes 2027 are matched with the bolt 2026, and the top of the top plate 2028 is provided with an auxiliary groove, so that the top plate 2028 is pushed and pulled,

[0034] First, the top plate 2028 is pushed and pulled, the guide plate 2024 is driven to slide along the guide column 205, and the support plate 2021 and the sleeve ring 203 are driven to move, while the outer cylinder 2023 moves outside the output shaft 201, and the two side shafts 2019 move horizontally, so that one of the blocks 2020 is inserted into the corresponding square groove 204, then the bolt 2026 is screwed into the corresponding screw hole 2027, and the top plate 2028 is fixed with the mounting block 2025, when the driving motor 2011 is started, the input shaft 208 is rotated, and the input large gear 207 and the input small gear 2010 are rotated, since the input large gear 207 and the input small gear 2010 are respectively meshed with the intermediate small gear 206 and the intermediate large gear 2013, the two intermediate shafts 209 are rotated, and finally the output shaft 201 is speed-changed, without repeated adjustment of gear meshing, avoiding causing gear wear.

[0035] In example three, on the basis of example one, the dustproof mechanism 3 comprises a fixed frame 301 fixed to the outside of the variable speed gear box body 1, the variable speed gear box body 1 is provided with a heat dissipation opening, the fixed frame 301 is arranged at the heat dissipation opening, the inside of the fixed frame 301 movably sleeved with a movable frame 302, the inside of the movable frame 302 fixedly installed with a dustproof frame 303, the dustproof frame 303 is uniformly provided with a plurality of filter holes 304, the inside of the movable frame 302 symmetrically fixedly connected with two inner blocks 305, the two inner blocks 305 are fixedly connected with side rods 3011, one end of the two side rods 3011 is fixedly connected with side blocks 3010, the heat dissipation opening is symmetrically fixedly connected with two side plates 306, the two side rods 3011 respectively penetrate through the two side plates 306 and are movably connected with the two side plates 306, the two side plates 306 are fixedly connected with return springs 307, one end of the two return springs 307 is fixedly connected with the two side blocks 3010, and the two return springs 307 are respectively sleeved on the outside of the two side rods 3011, the two side plates 306 are fixedly connected with a fixed plate 308, the side of the fixed plate 308 close to the dustproof frame 303 is uniformly fixedly connected with a plurality of dredging rods 309, the dredging rods 309 correspond to the filter holes 304 one by one, and the outer diameter value of the dredging rods 309 is equal to the inner diameter value of the filter holes 304;

[0036] Firstly, the heat dissipation opening is formed on the variable speed gear box body 1, which is convenient for the heat dissipation of the variable speed gear box body 1, and the fixed frame 301 is arranged at the heat dissipation opening, the movable frame 302 is movably arranged in the fixed frame 301, and the dustproof frame 303 is fixedly arranged in the movable frame 302, a plurality of filter holes 304 are uniformly arranged on the dustproof frame 303, so that the dust outside is prevented from entering the variable speed gear box body 1, when the movable frame 302 is pushed, the dustproof frame 303 is driven to move, the two side rods 3011 drive the two side blocks 3010 to move respectively, and the two reset springs 307 are stretched until the dustproof frame 303 abuts against the fixed plate 308, at this time, the dredging rod 309 is inserted into the filter hole 304 to dredge it, the cleaning of the filter hole 304 is completed, and the filter hole 304 is prevented from being blocked, when the movable frame 302 is loosened, the movable frame 302 and the dustproof frame 303 are reset under the action of the elasticity of the two reset springs 307, the dustproof frame 303 is separated from the fixed plate 308, and the dredging rod 309 is separated from the filter hole 304, and finally the circulation of air in and out of the variable speed gear box body 1 is ensured.

[0037] In the fourth embodiment, on the basis of the first embodiment, the connecting mechanism 4 comprises a screw rod 401 fixed to one end of the output shaft 201, a positioning frame 404 fixedly connected to the end of the screw rod 401 away from the output shaft 201, a positioning block 4011 fixedly connected to one end of the transmission shaft 6 close to the screw rod 401, the positioning block 4011 being inserted into the positioning frame 404, an installation disc 405 fixedly sleeved on the outer side of the transmission shaft 6, two recesses 4013 symmetrically provided on the installation disc 405, two rotating shafts 409 rotatably connected to the inner sides of the two recesses 4013, two L-shaped plates 4010 fixedly sleeved on the outer sides of the two rotating shafts 409, two insertion holes 4012 provided on the two L-shaped plates 4010, two abutting rollers 403 symmetrically provided on the outer side of the positioning frame 404, the two L-shaped plates 4010 abutting against the two abutting rollers 403 respectively, two L-shaped round rods 408 fixedly connected between the positioning frame 404 and the variable speed gear box body 1, an abutting ring 402 movably sleeved between the two L-shaped round rods 408, the abutting ring 402 being sleeved on the outer side of the screw rod 401 and not in contact with the screw rod 401, two insertion rods 407 fixedly connected to the side of the abutting ring 402 away from the positioning frame 404, the outer diameter values of the two insertion rods 407 being equal to the inner diameter values of the two insertion holes 4012, a screw cylinder 406 threadedly sleeved on the outer side of the screw rod 401, the screw cylinder 406 being located between the positioning frame 404 and the abutting ring 402, and a plurality of auxiliary handles uniformly provided on the outer side of the screw cylinder 406, so as to facilitate the rotation of the screw cylinder 406.

[0038] Firstly, the positioning block 4011 is inserted into the positioning frame 404, then the two L-shaped plates 4010 are rotated to abut against the two abutting rollers 403, then the abutting ring 402 is moved away from the positioning frame 404 along the two L-shaped round rods 408 until the abutting ring 402 abuts against the two L-shaped plates 4010, and then the two insertion rods 407 are respectively inserted into the two insertion holes 4012, then the screw cylinder 406 is rotated, since the screw cylinder 406 is threadedly sleeved outside the screw rod 401, so that the screw cylinder 406 moves horizontally while rotating until the screw cylinder 406 abuts against the abutting ring 402 to limit the two insertion rods 407, the fixing of the output shaft 201 and the transmission shaft 6 is completed to adjust the rotating speed of the threshing cylinder, and the transmission gear box body 1 and the threshing cylinder are designed in a split type, so that the transmission gear box body 1 and the threshing cylinder are convenient to disassemble, maintain and assemble.

Claims

1. A low vibration split type threshing cylinder transmission gear box comprising a transmission gear box housing (1), characterized in that: The top of the variable speed gear box body (1) is hinged with a box cover (5), the variable speed gear box body (1) is provided with a variable speed adjusting mechanism (2) and a dustproof mechanism (3), the outer side of the variable speed gear box body (1) is provided with a transmission shaft (6), and the transmission shaft (6) is provided with a connecting mechanism (4) between the variable speed gear box body (1); The variable speed gear box body (1) comprises an output shaft (201) rotatably connected to the inside of the variable speed gear box body (1), one end of the output shaft (201) extends to the outside of the variable speed gear box body (1), the inside of the variable speed gear box body (1) is rotatably connected with two intermediate shafts (209), the outer sides of the two intermediate shafts (209) are respectively fixedly installed with an intermediate small gear (206) and an intermediate large gear (2013), the inside of the variable speed gear box body (1) is rotatably connected with an input shaft (208), one end of the input shaft (208) extends to the outside of the variable speed gear box body (1) and is fixedly installed with a driving motor (2011), the driving motor (2011) is fixedly connected with an L-shaped seat (2012), the L-shaped seat (2012) is fixed to the outside of the variable speed gear box body (1), the two intermediate shafts (209) are located between the output shaft (201) and the input shaft (208), the outer side of the input shaft (208) is fixedly installed with an input large gear (207) and an input small gear (2010), the input large gear (207) is in meshing connection with the intermediate small gear (206), and the input small gear (2010) is in meshing connection with the intermediate large gear (2013); The outer side of the output shaft (201) movably sleeves the outer cylinder (2023), the outer side of the outer cylinder (2023) is fixedly installed with two upper transmission gears (2017) in symmetry, the outer side of the output shaft (201) is provided with two limiting grooves (202) in symmetry, the inner side of the outer cylinder (2023) is fixedly connected with two limiting blocks (2022) in symmetry, the two limiting blocks (2022) are respectively in sliding connection with the two limiting grooves (202), the outer side of the outer cylinder (2023) is provided with a sleeve ring (203), and the sleeve ring (203) does not contact the outer cylinder (2023), the outer side of the sleeve ring (203) is fixedly connected with a supporting plate (2021) located between the two intermediate shafts (209), the outer side of the supporting plate (2021) is rotatably connected with two side shafts (2019) in symmetry, the outer sides of the two side shafts (2019) are both fixedly installed with a lower transmission gear (2018), the two lower transmission gears (2018) are respectively in meshing connection with the two upper transmission gears (2017), and the ends of the two side shafts (2019) away from each other are both fixedly connected with a square block (2020), the ends of the two intermediate shafts (209) close to each other are both provided with a square groove (204), and the two square grooves (204) are both matched with the square block (2020).

2. A low vibration split type threshing cylinder transmission gear box according to claim 1, characterized in that: The outer side of the outer cylinder (2023) is symmetrically fixed with two outer rings (2016), the sleeve ring (203) is located between the two outer rings (2016), and the sleeve ring (203) is fixedly connected with a plurality of fixed rods (2014) at equal angles on both sides, and the end of each fixed rod (2014) away from the sleeve ring (203) is provided with a ball (2015) abutting the outer ring (2016).

3. A low vibration split type threshing cylinder transmission gear box as claimed in claim 1 wherein: The inside of the variable speed gear box body (1) is fixedly connected with a guide column (205), the outside of the guide column (205) is movably sleeved with a guide plate (2024), the guide plate (2024) is fixed on the outside of the supporting plate (2021), the top of the guide plate (2024) is fixedly connected with a top plate (2028), one side of the top plate (2028) away from the guide plate (2024) extends to the outside of the variable speed gear box body (1), the outside of the variable speed gear box body (1) is fixedly provided with a mounting block (2025), the mounting block (2025) is sleeved on the outside of the top plate (2028), the mounting block (2025) is provided with a bolt (2026), the top of the top plate (2028) is provided with two screw holes (2027), the mounting block (2025) is located between the two screw holes (2027), and the two screw holes (2027) are matched with the bolt (2026).

4. A low vibration split type threshing cylinder transmission gear box as claimed in claim 1 wherein: The dustproof mechanism (3) comprises a fixed frame (301) fixed on the outside of the variable speed gear box body (1), the variable speed gear box body (1) is provided with a heat dissipation opening, the fixed frame (301) is arranged at the heat dissipation opening, the inside of the fixed frame (301) is movably sleeved with a movable frame (302), the inside of the movable frame (302) is fixedly provided with a dustproof frame (303), and the dustproof frame (303) is uniformly provided with a plurality of filter holes (304).

5. A low vibration split cylinder threshing gearbox as claimed in claim 4 wherein: The inside of the movable frame (302) is symmetrically fixedly connected with two inner blocks (305), the two inner blocks (305) are fixedly connected with side rods (3011), one end of the two side rods (3011) is fixedly connected with a side block (3010), the inside of the heat dissipation opening is symmetrically fixedly connected with two side plates (306), the two side rods (3011) respectively penetrate through the two side plates (306) and are movably connected with the two side plates (306), the two side plates (306) are fixedly connected with return springs (307), one end of the two return springs (307) is fixedly connected with the two side blocks (3010), and the two return springs (307) are respectively sleeved on the outside of the two side rods (3011), the two side plates (306) are fixedly connected with a fixed plate (308), a plurality of dredging rods (309) are uniformly fixedly connected on one side of the fixed plate (308) close to the dustproof frame (303), the dredging rods (309) correspond to the filter holes (304) one by one, and the outer diameter value of the dredging rods (309) is equal to the inner diameter value of the filter holes (304).

6. A low vibration split type threshing cylinder transmission gear box as claimed in claim 1 wherein: The connecting mechanism (4) comprises a screw rod (401) fixed at one end of the output shaft (201), the screw rod (401) is fixedly connected with a positioning frame (404) at an end away from the output shaft (201), and the transmission shaft (6) is fixedly connected with a positioning block (4011) at an end close to the screw rod (401), and the positioning block (4011) is inserted into the positioning frame (404).

7. A low vibration split type threshing cylinder transmission gear box as claimed in claim 1 wherein: The outer side of the transmission shaft (6) is fixedly sleeved with a mounting disc (405), the mounting disc (405) is symmetrically provided with two grooves (4013), the inner sides of the two grooves (4013) are rotatably connected with two rotating shafts (409), the outer sides of the two rotating shafts (409) are fixedly sleeved with two L-shaped plates (4010), the two L-shaped plates (4010) are provided with insertion holes (4012), and the outer side of the positioning frame (404) is symmetrically provided with two abutting rollers (403).

8. A low vibration split type threshing cylinder transmission gear box as claimed in claim 6 wherein: The positioning frame (404) and the transmission gear box body (1) are symmetrically fixedly connected with two L-shaped round rods (408), the two L-shaped round rods (408) are movably sleeved with an abutting ring (402), the abutting ring (402) is sleeved on the outer side of the screw rod (401) and does not contact the screw rod (401), the side, away from the positioning frame (404), of the abutting ring (402) is symmetrically fixedly connected with two insertion rods (407), the outer diameter values of the two insertion rods (407) are equal to the inner diameter values of the two insertion holes (4012), the outer side of the screw rod (401) is threadedly sleeved with a screw cylinder (406), and the screw cylinder (406) is located between the positioning frame (404) and the abutting ring (402).

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