Dual-purpose gearbox of rotary cultivator

Abstract

The invention relates to the technical field of rotary cultivators, in particular to a dual-purpose rotary cultivator gearbox. An input shaft is arranged on one side wall of a box body, an input cover is arranged on the opposite side wall of the box body, one end of the input shaft is rotationally connected with the box body, the other end of the input shaft is rotationally connected with the input cover, and the input cover is detachably connected with the box body; an output shaft is arranged on the box body on one side of the input shaft in the length direction, a dismounting cover is arranged on the box body on the other side of the input shaft in the length direction, the output shaft is rotationally connected with the box body, an input bevel gear is fixedly arranged on the input shaft, an output bevel gear is fixedly arranged on the output shaft, and the input bevel gear is meshed with the output bevel gear; and a mounting plate is further included, a mounting hole is formed in the position, corresponding to the dismounting and mounting cover, of the box body, the mounting plate is used for being detachably connected to the mounting hole of the box body, an output shaft is also rotationally connected to the mounting plate, and an output bevel gear meshed with the input bevel gear is also arranged on the output shaft on the mounting plate. The device is suitable for various rotary cultivators.

Description

Technical Field

[0001] The invention relates to the technical field of rotary tillers, and in particular to a dual-purpose rotary tiller gear box. Background Art

[0002] Rotary tillers are tilling machines that work with tractors to complete ploughing and harrowing operations. They are widely used because of their strong soil crushing ability and flat surface after ploughing. They can also cut up the root stubble buried below the surface, making it easier for the seeder to operate and providing a good seed bed for later sowing.

[0003] The blade shaft of a rotary tiller is usually driven through a gear box, and different types of through-shaft rotary tillers and folding rotary tillers use different types of gear boxes. Under the existing technology, the gear box structure of the rotary tiller is scattered, and a set of gear boxes requires a box body and five covers, which is not only inconvenient to assemble, but also cannot be applied to different rotary tillers. Different rotary tillers need to be equipped with different gear boxes when in use, and the production cost is high. Summary of the invention

[0004] In order to solve the problem that the gear box structure of the rotary tiller in the prior art is scattered, a set of gear boxes requires a box body and five covers, which is not only inconvenient to assemble, but also cannot be applied to different rotary tillers. Different rotary tillers need to be equipped with different gear boxes when in use, and the production cost is high. The present application provides a dual-use rotary tiller gear box, and the specific solution is as follows.

[0005] A dual-purpose rotary tiller gearbox, comprising a box body, characterized in that: an input shaft is arranged on one side wall of the box body, an input cover is arranged on the opposite side wall of the box body, one end of the input shaft is rotatably connected to the box body, the other end of the input shaft is rotatably connected to the input cover, the input cover and the box body are detachably connected, an output shaft is arranged on the box body on one side in the length direction of the input shaft, a disassembly cover is arranged on the box body on the other side in the length direction of the input shaft, the output shaft is rotatably connected to the box body, an input bevel gear is fixedly arranged on the input shaft, an output bevel gear is fixedly arranged on the output shaft, and the input bevel gear and the output bevel gear are meshed with each other; It also includes a mounting plate, a mounting hole is opened at the position of the box body corresponding to the disassembly cover, the mounting plate is used to be detachably connected to the mounting hole of the box body, the mounting plate is also rotatably connected to the output shaft, and the output shaft on the mounting plate is also provided with an output bevel gear meshing with the input bevel gear.

[0006] By adopting the above technical solutions, two covers can be reduced, and one box body and three covers are used, making the structure more compact. An output shaft is provided on one side of the box body, enabling a stable shaft body that can output on one side, while on the other side, a detachable cover and a mounting plate are provided. When used in a rotary tiller with a through shaft, it can be directly used without disassembling the detachable cover, and when used in a folding rotary tiller, the detachable cover can be removed and the mounting plate can be installed, so that both sides of the gearbox have output shaft bodies, making the assembly more convenient, and it is applicable to different types of rotary tillers, effectively reducing the production cost.

[0007] Optionally, roller bearings are fixedly installed on the box body corresponding to the input shaft, and roller bearings are also fixedly installed on the input cover, and the input shaft is installed on the roller bearings.

[0008] By adopting the above technical solutions, both ends of the input shaft are supported by the roller bearings on the box body and the input cover respectively, improving the stability of the input shaft, reducing friction and wear during operation, and extending the service life. At the same time, the use of roller bearings makes the input shaft rotate more smoothly at high speed, reducing vibration and noise, and enhancing the overall performance of the equipment.

[0009] Optionally, roller bearings are also fixedly installed on the box body corresponding to the output shaft, and roller bearings are also fixedly installed on the mounting plate, and the output shafts are all installed on the corresponding roller bearings.

[0010] By adopting the above technical solutions, the use of roller bearings at the output shaft significantly improves the rotational accuracy and stability of the output shaft, effectively reducing wear caused by friction and extending the service life of the equipment. At the same time, the installation of roller bearings enables the output shaft to maintain a good operating state under high loads, enhancing the working efficiency and reliability of the rotary tiller.

[0011] Optionally, a conical surface is provided at the position of the mounting hole on the box body. The center of the cone formed by the conical surface is at the same position as the center of the mounting hole. The conical surface slopes from the outside of the box body towards the inside of the box body. A mating conical surface is provided on the mounting plate corresponding to the conical surface, and a mating conical surface is also provided on the detachable cover corresponding to the conical surface. The conical surface is used to abut against the mating conical surface.

[0012] By adopting the above technical solutions, the design of the conical surface and the mating conical surface significantly improves the sealing performance and stability between the mounting plate, the detachable cover and the box body. The conical surface slopes from the outside of the box body towards the inside, which not only helps to accurately align the mounting plate and the detachable cover, but also enhances their compressive capacity during operation, ensuring the normal operation of the gearbox. At the same time, the center of the cone formed by the conical surface is at the same position as the center of the mounting hole, further improving the concentricity of the structure, reducing wear and vibration caused by eccentricity, and extending the service life of the equipment.

[0013] Optionally, an air extraction groove is provided on the conical surface. The air extraction groove is arranged circumferentially around the conical surface. An air extraction hole is provided on the box body corresponding to the air extraction groove. The air extraction hole is communicated with the air extraction groove. An air pump is provided at the air extraction hole. The air pump is used to extract the gas in the air extraction groove.

[0014] By adopting the above technical solution, the air extraction groove and the air extraction hole provided on the conical surface can effectively form an adsorption force, further increasing the friction force between the mounting plate or the disassembly and assembly cover and the box body, improving the assembly accuracy and service life. At the same time, the air pump extracts the gas in the air extraction groove, further enhancing the sealing performance, preventing external impurities from entering the inside of the gearbox, and ensuring the stable operation of the gear transmission system.

[0015] Optionally, a shock absorption groove is also provided on the conical surface. The shock absorption groove is also arranged around the conical surface. A shock absorption ring is provided in the shock absorption groove. There are two shock absorption rings and they are arranged on both sides of the shock absorption groove. The shock absorption ring is slidably connected with the shock absorption groove. The shock absorption ring can slide along the shock absorption groove. A driving member is also provided on the box body. The driving member is used to push the shock absorption ring towards the center of the mounting hole. The shock absorption ring is used to abut and cooperate with the conical surface.

[0016] By adopting the above technical solution, the design of the shock absorption groove and the shock absorption ring effectively reduces the vibration generated during the installation process and improves the installation accuracy. At the same time, the shock absorption ring can slide in the shock absorption groove and move towards the center of the mounting hole under the action of the driving member, and can adjust the position of the shock absorption ring according to the usage situation so as to improve the clamping degree of the mounting plate.

[0017] Optionally, the driving member includes a cylinder body. The cylinder body is fixedly connected with the box body. A piston rod is slidably connected to the cylinder body. The piston rod is fixedly connected with the corresponding shock absorption ring. A magnetic core is also provided in the cylinder body. The magnetic core is fixedly connected with the piston rod. An exciting coil for energization is provided on the magnetic core. A magnetorheological fluid is filled at the end of the cylinder body away from the piston rod. The magnetorheological fluid interferes with the sliding of the piston rod when the magnetic core is energized.

[0018] By adopting the above technical solution, the cylinder body is provided and the magnetic core and the magnetorheological fluid are arranged inside. When the exciting coil on the magnetic core is energized, the magnetic core will form a magnetic field. When there is no magnetic field, the magnetorheological fluid is a Newtonian fluid with no odor and low viscosity, and it is easier to embed when installing the mounting plate and the disassembly and assembly cover. When there is a magnetic field, the magnetorheological fluid is a Newtonian fluid with high viscosity and low fluidity, and has a good shock absorption effect. At the same time of shock absorption, it can also play a good fixing effect on the mounting plate and the disassembly and assembly cover.

[0019] Optionally, a compensation air bag is fixedly provided at the end of the cylinder body away from the piston rod. The compensation air bag can contact the magnetorheological fluid.

[0020] By adopting the above technical solution, a compensation airbag is fixedly arranged at one end of the cylinder body far away from the piston rod, and the compensation airbag can contact with the magnetorheological fluid. This enables the compensation airbag to absorb or release pressure when the magnetorheological fluid is compressed or expanded, maintaining the pressure stability in the system, thereby improving the response speed and reliability of the shock absorber ring, reducing the unstable phenomenon caused by pressure fluctuations, and ensuring a smoother and more reliable shock absorption effect.

[0021] Optionally, the air pump is electrically connected to the excitation coil, and the excitation coil works synchronously with the air pump. The shock absorption groove is arranged on one side close to the inside of the box body, and the air extraction groove is arranged on one side far away from the inside of the box body.

[0022] By adopting the above technical solution, the air pump and the excitation coil work synchronously. During installation and disassembly, the air pump can be clamped and released synchronously with the piston rod, making the disassembly and assembly more convenient.

[0023] Optionally, a locking groove is further arranged on the conical surface, a shape memory alloy is embedded in the locking groove, an induction coil is also embedded in the box body in the locking groove, the induction coil is used to heat the shape memory alloy, a pin hole is arranged on the mating conical surface corresponding to the shape memory alloy, the shape memory alloy can extend into the pin hole after being heated, the induction coil is electrically connected to the excitation coil, and the induction coil works synchronously with the excitation coil.

[0024] By adopting the above technical solution, the locking groove and the shape memory alloy on the conical surface can extend into the pin hole on the mating conical surface under the heating of the induction coil, thereby realizing a firm connection between the mounting plate or the disassembly and assembly cover and the box body, improving the overall stability of the device. At the same time, the induction coil and the excitation coil work synchronously, and during disassembly and assembly, locking and releasing can be carried out synchronously, further improving the convenience of disassembly and assembly.

[0025] In summary, the present application has at least the following beneficial effects: The present application solves the problem that the gearbox structure of the existing rotary tiller is scattered. A set of gearboxes requires one box body and five covers, which is not only inconvenient for assembly but also cannot be applied to different rotary tillers. Different rotary tillers need to be equipped with different gearboxes during use, resulting in a high production cost. By reducing the number of gearbox covers, the overall structure of the present application is made more compact, and a detachable output shaft is provided, which can be used as the gearbox of a through-shaft rotary tiller or the gearbox of a folding rotary tiller, improving the versatility and reducing the production cost.

[0026] The present application also improves the stability of the box body during operation by providing a shock absorber ring using magnetorheological fluid, which can not only achieve a shock absorption effect but also a clamping effect on the mounting plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is the front view of the first embodiment.

[0028] Figure 2 is the sectional view of the first embodiment.

[0029] Figure 3 is the sectional view of the first embodiment, mainly used to show the situation after the mounting plate is installed.

[0030] Figure 4 is the sectional view of the second embodiment, mainly used to show the situation after the mounting plate is installed.

[0031] Figure 5 is the sectional view of the second embodiment, mainly used to show the air extraction groove and the shock absorption groove.

[0032] Figure 6 is the sectional view of the third embodiment, mainly used to show the situation after the mounting plate is installed.

[0033] Explanation of reference numerals: 1. Box body; 11. Input cover; 12. Mounting hole; 13. Roller bearing; 14. Tapered surface; 141. Air extraction groove; 142. Shock absorption groove; 143. Shock absorption ring; 144. Air pump; 15. Cylinder body; 151. Magnetic core; 152. Excitation coil; 153. Magnetorheological fluid; 154. Compensation airbag; 155. Piston rod; 16. Locking groove; 161. Shape memory alloy; 162. Induction coil; 2. Input shaft; 21. Input bevel gear; 3. Output shaft; 31. Output bevel gear; 4. Disassembly and assembly cover; 5. Mounting plate; 51. Matching tapered surface. Detailed implementation manners

[0034] The following further details the present application through specific embodiments in conjunction with the accompanying drawings.

[0035] First embodiment

[0036] A dual-purpose rotary tiller gearbox, as Figure 1 and Figure 2As shown in the figure, it includes a box body 1. An input shaft 2 is provided on one side wall of the box body 1, and an input cover 11 is provided on the opposite side wall of the box body 1. One end of the input shaft 2 is rotatably connected to the box body 1, and the other end of the input shaft 2 is rotatably connected to the input cover 11. The input cover 11 and the box body 1 are detachably connected, and the input cover 11 and the box body 1 are detachably connected by bolts. An output shaft 3 is provided on the box body 1 on one side in the length direction of the input shaft 2, and a disassembly and assembly cover 4 is provided on the box body 1 on the other side in the length direction of the input shaft 2. The output shaft 3 is rotatably connected to the box body 1. An input bevel gear 21 is fixedly provided on the input shaft 2, and an output bevel gear 31 is fixedly provided on the output shaft 3. The input bevel gear 21 and the output bevel gear 31 are meshed with each other. Specifically, the input shaft 2 is connected to a driving device such as a motor for rotation as a driving source, and the output shaft 3 completes the transmission rotation through the cooperation of the output bevel gear 31 and the input bevel gear 21, so as to realize the drive of the rotary tiller.

[0037] As Figure 2 and Figure 3 shown in the figure, it further includes a mounting plate 5. A mounting hole 12 is provided on the box body 1 corresponding to the position of the disassembly and assembly cover 4. The mounting plate 5 is used for detachably connecting to the mounting hole 12 of the box body 1. The output shaft 3 is also rotatably connected to the mounting plate 5, and an output bevel gear 31 meshed with the input bevel gear 21 is also provided on the output shaft 3 of the mounting plate 5. Specifically, when implemented, the mounting plate 5 and the box body 1 are detachably connected by bolts. When applied to a through-shaft rotary tiller, there is no need to remove the disassembly and assembly cover 4. When applied to a folding rotary tiller, only the disassembly and assembly cover 4 needs to be removed, and the mounting plate 5 is installed on the mounting hole 12. At this time, the output shaft 3 on the mounting plate 5 can also output, thus improving the versatility.

[0038] As Figure 2 and Figure 3 shown in the figure, roller bearings 13 are fixedly installed on the box body 1 corresponding to the input shaft 2, and roller bearings 13 are also fixedly installed on the input cover 11. The input shaft 2 is installed on the roller bearings 13. Roller bearings 13 are also fixedly installed on the box body 1 corresponding to the output shaft 3, and roller bearings 13 are also fixedly installed on the mounting plate 5. The output shafts 3 are all installed on the corresponding roller bearings 13. Specifically, when implemented, the roller bearings 13 can reduce the friction when the output shaft 3 and the input shaft 2 rotate, and at the same time play a certain shock-absorbing effect, improving the stability during use.

[0039] Working principle: The number of covers of the box body 1 is reduced to three. Among them, the input cover 11 is a normally closed cover body, and the disassembly and assembly cover 4 can be replaced according to the situation with the mounting plate 5, so as to add an output shaft 3 to adapt to the folding rotary tiller and improve the versatility.

[0040] Embodiment 2

[0041] The main difference between Embodiment 2 and Embodiment 1 is that, asFigure 4 and Figure 5 As shown in Figure 5 , a conical surface 14 is provided at the position of the mounting hole 12 corresponding to the box body 1. The center of the cone formed by the conical surface 14 is at the same position as the center of the mounting hole 12. The conical surface 14 slopes from the outside of the box body 1 towards the inside of the box body 1. A mating conical surface 51 is provided on the mounting plate 5 corresponding to the conical surface 14, and a mating conical surface 51 is also provided on the dismounting and assembling cover 4 corresponding to the conical surface 14. The conical surface 14 is used to abut against the mating conical surface 51. In specific implementation, during installation, the conical surface 14 and the mating conical surface 51 form a fit, which can not only play a guiding role in the installation of the mounting plate 5 and the dismounting and assembling cover 4, but also improve the stability after installation and reduce the loosening caused by the vibration of the gearbox during operation.

[0042] As Figure 4 and Figure 5 shown in Figure 5 , an air extraction groove 141 is formed on the conical surface 14. The air extraction groove 141 is arranged circumferentially around the conical surface 14. An air extraction hole is formed on the box body 1 corresponding to the air extraction groove 141. The air extraction hole is communicated with the air extraction groove 141. An air pump 144 is arranged at the air extraction hole. The air pump 144 is used to extract the gas in the air extraction groove 141. In specific implementation, when the gas at the air extraction hole is extracted outward, an adsorption force can be formed at the air extraction groove 141 to adsorb the mounting plate 5 or the dismounting and assembling cover 4, increasing the friction force and making the installation more stable.

[0043] As Figure 4 and Figure 5 shown in Figure 5 , a shock absorption groove 142 is also formed on the conical surface 14. The shock absorption groove 142 is also arranged around the conical surface 14. A shock absorption ring 143 is arranged in the shock absorption groove 142. There are two shock absorption rings 143 and they are arranged on both sides of the shock absorption groove 142. The shock absorption ring 143 is slidably connected with the shock absorption groove 142. The shock absorption ring 143 can slide along the shock absorption groove 142. A driving member is also arranged on the box body 1. The driving member is used to push the shock absorption ring 143 towards the center of the mounting hole 12. The shock absorption ring 143 is used to abut against the mating conical surface 51. In specific implementation, the shock absorption ring 143 is integrally arranged in an oblique semi-circular ring shape and surrounds the mating conical surface 51, which can clamp the mounting plate 5 or the dismounting and assembling cover 4, not only playing a shock absorption effect during vibration, but also further increasing the stability after installation.

[0044] As Figure 4 and Figure 5As shown, the driving member includes a cylinder body 15. The cylinder body 15 is fixedly connected to the box body 1. A piston rod 155 is slidably connected to the cylinder body 15. The piston rod 155 is fixedly connected to the corresponding shock-absorbing ring 143. A magnetic core 151 is further arranged inside the cylinder body 15. The magnetic core 151 is fixedly connected to the piston rod 155. An exciting coil 152 for energization is arranged on the magnetic core 151. A magnetorheological fluid 153 is filled at one end of the cylinder body 15 away from the piston rod 155. The magnetorheological fluid 153 interferes with the sliding of the piston rod 155 when the magnetic core 151 is energized. A compensation airbag 154 is fixedly arranged at one end of the cylinder body 15 away from the piston rod 155. The compensation airbag 154 can contact the magnetorheological fluid 153. Specifically in implementation, when there is no magnetic field, the magnetorheological fluid 153 is a Newtonian fluid with no odor and low viscosity, and it is easier to embed when installing the mounting plate 5 and the disassembly and assembly cover 4. When there is a magnetic field, the magnetorheological fluid 153 is a Newtonian fluid with high viscosity and low fluidity, having a good shock-absorbing effect and can further increase the stability during installation when clamping.

[0045] As Figure 4 and Figure 5 shown, an air pump 144 is electrically connected to the exciting coil 152. The exciting coil 152 and the air pump 144 work synchronously. A shock-absorbing groove 142 is opened on one side close to the inside of the box body 1, and an air extraction groove 141 is opened on one side away from the inside of the box body 1. Specifically in implementation, the air pump 144 and the exciting coil 152 work synchronously. During disassembly and assembly, the clamping and releasing actions can be more synchronous, further increasing the convenience of disassembly and assembly.

[0046] Working principle: The basic working principle is the same as that of the first embodiment, but during disassembly and assembly, through gas adsorption, the stability during installation can be further increased. Since the output shaft 3 needs to be installed at the mounting plate 5, the output shaft 3 is prone to vibration during rotation, which may cause the mounting plate 5 to become loose. Therefore, the shock-absorbing ring 143 can play a good shock-absorbing effect and improve the stability of the gearbox during use.

[0047] Embodiment Three

[0048] As Figure 6As shown, a locking groove 16 is also formed on the conical surface 14. A shape memory alloy 161 is embedded in the locking groove 16, and an induction coil 162 is also embedded in the box body 1 within the locking groove 16. The induction coil 162 is used to heat the shape memory alloy 161. A pin hole corresponding to the shape memory alloy 161 is formed on the conical surface 51. After being heated, the shape memory alloy 161 can extend into the pin hole. The induction coil 162 is electrically connected to the excitation coil 152, and the induction coil 162 and the excitation coil 152 work synchronously. In specific implementation, the shape memory alloy 161 is made of Ni-Ti alloy, which can expand when heated and contract when cooled. The induction coil 162 can heat the shape memory alloy 161, and together with the excitation coil 152 and the air pump 144, it can disassemble and assemble the mounting plate 5 or the disassembly and assembly cover 4, further improving the convenience of disassembly and assembly.

[0049] Working principle: The basic working principle is the same as that of the second embodiment, but the degree of automation during disassembly and assembly is further increased.

[0050] The above are the preferred embodiments of the present application. The protection scope of the present application is not limited by this. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A dual-purpose rotary tiller gearbox, comprising a box body (1), characterized in that: One side wall of the box body (1) is provided with an input shaft (2). An input cover (11) is provided on the opposite side wall of the box body (1). One end of the input shaft (2) is rotatably connected to the box body (1), and the other end of the input shaft (2) is rotatably connected to the input cover (11). The input cover (11) is detachably connected to the box body (1). An output shaft (3) is provided on the box body (1) on one side in the length direction of the input shaft (2), and a disassembly and assembly cover (4) is provided on the box body (1) on the other side in the length direction of the input shaft (2). The output shaft (3) is rotatably connected to the box body (1). An input bevel gear (21) is fixedly provided on the input shaft (2), and an output bevel gear (31) is fixedly provided on the output shaft (3). The input bevel gear (21) meshes with the output bevel gear (31). It further includes a mounting plate (5). A mounting hole (12) is formed in the box body (1) at the position corresponding to the disassembly and assembly cover (4). The mounting plate (5) is used for detachably connecting to the mounting hole (12) of the box body (1). An output shaft (3) is also rotatably connected to the mounting plate (5), and an output bevel gear (31) meshing with the input bevel gear (21) is also provided on the output shaft (3) of the mounting plate (5).

2. The dual-purpose rotary tiller gearbox according to claim 1, characterized in that: A roller bearing (13) is fixedly installed on the box body (1) corresponding to the input shaft (2), and a roller bearing (13) is also fixedly installed on the input cover (11). The input shaft (2) is installed on the roller bearing (13).

3. The dual-purpose rotary tiller gearbox according to claim 2, characterized in that: A roller bearing (13) is also fixedly installed on the box body (1) corresponding to the output shaft (3), and a roller bearing (13) is also fixedly installed on the mounting plate (5). The output shafts (3) are all installed on the corresponding roller bearings (13).

4. A dual-purpose rotary tiller gearbox according to claim 1, characterized in that: A conical surface (14) is provided on the box body (1) at the position corresponding to the mounting hole (12). The center of the cone formed by the conical surface (14) is at the same position as the center of the mounting hole (12). The conical surface (14) inclines from the outside of the box body (1) towards the inside of the box body (1). A mating conical surface (51) is provided on the mounting plate (5) corresponding to the conical surface (14), and a mating conical surface (51) is also provided on the disassembly and assembly cover (4) corresponding to the conical surface (14). The conical surface (14) is used for abutting against the mating conical surface (51).

5. A dual-purpose rotary tiller gearbox according to claim 4, characterized in that: An air extraction groove (141) is formed on the conical surface (14). The air extraction groove (141) is arranged circumferentially around the conical surface (14). An air extraction hole is formed in the box body (1) corresponding to the air extraction groove (141). The air extraction hole is communicated with the air extraction groove (141). An air pump (144) is provided at the air extraction hole. The air pump (144) is used for extracting the gas in the air extraction groove (141).

6. A dual-purpose rotary tiller gearbox according to claim 5, characterized in that: The conical surface (14) is also provided with a shock-absorbing groove (142), and the shock-absorbing groove (142) also surrounds the conical surface (14). A shock-absorbing ring (143) is arranged in the shock-absorbing groove (142). There are two shock-absorbing rings (143) and they are arranged on both sides of the shock-absorbing groove (142). The shock-absorbing ring (143) is slidably connected to the shock-absorbing groove (142), and the shock-absorbing ring (143) can slide along the shock-absorbing groove (142). A driving member is further arranged on the box body (1), and the driving member is used to push the shock-absorbing ring (143) to move towards the center of the mounting hole (12). The shock-absorbing ring (143) is used for abutting and cooperating with the mating conical surface (51).

7. A dual-purpose rotary tiller gearbox according to claim 6, characterized in that: The driving member includes a cylinder body (15). The cylinder body (15) is fixedly connected to the box body (1). A piston rod (155) is slidably connected to the cylinder body (15). The piston rod (155) is fixedly connected to the corresponding shock-absorbing ring (143). A magnetic core (151) is further arranged in the cylinder body (15). The magnetic core (151) is fixedly connected to the piston rod (155). An exciting coil (152) for electrifying is arranged on the magnetic core (151). The inner end of the cylinder body (15) far from the piston rod (155) is filled with magnetorheological fluid (153). The magnetorheological fluid (153) interferes with the sliding of the piston rod (155) when the magnetic core (151) is electrified.

8. A dual-purpose rotary tiller gearbox according to claim 7, characterized in that: A compensation airbag (154) is fixedly arranged at the inner end of the cylinder body (15) far from the piston rod (155), and the compensation airbag (154) can contact the magnetorheological fluid (153).

9. A dual-purpose rotary tiller gearbox according to claim 7, characterized in that: The air pump (144) is electrically connected to the exciting coil (152), and the exciting coil (152) and the air pump (144) work synchronously. The shock-absorbing groove (142) is opened on the side close to the inside of the box body (1), and the air extraction groove (141) is opened on the side far from the inside of the box body (1).

10. A dual-purpose rotary tiller gearbox according to claim 9, characterized in that: A locking groove (16) is further opened on the conical surface (14). A shape memory alloy (161) is embedded in the locking groove (16). An induction coil (162) is also embedded in the box body (1) in the locking groove (16). The induction coil (162) is used to heat the shape memory alloy (161). A pin hole is opened on the mating conical surface (51) corresponding to the shape memory alloy (161). The shape memory alloy (161) can extend into the pin hole after being heated. The induction coil (162) is electrically connected to the exciting coil (152), and the induction coil (162) and the exciting coil (152) work synchronously.

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