Bidirectional transmission for two-wheeled vehicle

Abstract

The invention relates to the technical field of transmissions, in particular to a bidirectional transmission for a two-wheeled vehicle, which comprises a main shaft, a sun gear on the main shaft, a planet carrier on the outer side of the sun gear, a gear ring on the outer side of the planet carrier, and a hub on the outer side of the gear ring. The main shaft is matched with the gear ring, the first-stage clutch and the hub to form a transmission structure, power output is achieved, then different power input paths can be achieved through matching and separating of the pawls and the ratchet grooves on the adjusting assembly, and when the pawls are embedded into the ratchet grooves, the power output is achieved. The transmission path of power in the planet structure can be changed through mutual cooperation of the planet carrier, the sun gear, the end cover and the secondary clutch, different transmission ratios are achieved, and therefore a driver can adjust the power input path and input speed of the two-wheeled vehicle according to the actual riding condition, and the driving efficiency is improved. And the riding comfort, the controllability and the overall performance of the vehicle are improved, so that a driver can better adapt to various road conditions and riding requirements.

Description

Technical Field

[0001] The invention relates to a bidirectional transmission device, in particular to a bidirectional transmission for a two-wheeled vehicle, and belongs to the technical field of transmissions. Background Art

[0002] A transmission is a device used to adjust the speed of mechanical operation. It is usually used in various vehicles, mechanical equipment and other fields. Through different gear combinations or other changes in transmission methods, the transmission can adjust the input speed and torque.

[0003] In the development process of two-wheeled vehicles, traditional transmissions often have problems such as inflexible and inconvenient speed shifting operation, limited transmission ratio adjustment range, and insufficient stability and reliability. When faced with roads with different slopes, a single transmission ratio system cannot simultaneously take into account the larger torque required for climbing and the high speed requirements for driving on flat roads, making it difficult for drivers to flexibly adjust the power input path and speed according to the diverse road conditions in actual riding, and thus unable to meet the driver's requirements for vehicle power performance in various actual riding scenarios.

[0004] Therefore, it is urgent to improve the two-wheeled vehicle bidirectional transmission to solve the above-mentioned problems. Summary of the invention

[0005] The purpose of the present invention is to provide a two-wheeled vehicle bidirectional transmission, in which the main shaft cooperates with the ring gear, the primary clutch and the hub to form a transmission structure to achieve power output, and different power input paths can be achieved by adjusting the cooperation and separation of the pawl and the ratchet groove on the assembly. When the pawl is embedded in the ratchet groove, the power transmission path in the planetary structure can be changed through the cooperation between the planetary carrier and the sun gear, the end cover and the secondary clutch to achieve different transmission ratios, thereby allowing the driver to adjust the power input path and input speed of the two-wheeled vehicle according to the actual riding situation, thereby improving the riding comfort, controllability and overall vehicle performance, so that the driver can better adapt to various road conditions and riding requirements.

[0006] In order to achieve the above object, the main technical solutions adopted by the present invention include:

[0007] A two-wheeled vehicle bidirectional transmission comprises a main shaft, a sun gear is rotatably connected to the main shaft through a bearing, a planet carrier is arranged on the outside of the sun gear, a gear ring is arranged on the outside of the planet carrier, a hub is arranged on the outside of the gear ring, a primary clutch is arranged between the hub and the gear ring, a ratchet groove is opened at one end of the planet carrier, an adjustment assembly is arranged on one side of the ratchet groove, the other side of the adjustment assembly corresponds to the sun gear, an end cover is arranged on the side of the sun gear away from the adjustment assembly, the end cover is fixedly connected to the hub by bolts, and a secondary clutch is arranged between the end cover and the hub;

[0008] The adjusting assembly includes a pawl seat, which is fixedly mounted on the main shaft, and the pawl seat is provided with two slots, a pawl is arranged inside the slot, the pawl corresponds to the ratchet slot, and the upper ends of the two pawls are fixedly connected with a pawl ring, and the end of the pawl ring away from the pawl is fixedly connected with a rotating plug, and a cable locking piece is fixedly connected to the rotating plug. The main shaft cooperates with the gear ring, the primary clutch and the hub to form a transmission structure to achieve power output, and then the rotating plug is driven by pulling the cable on the cable locking piece. Rotate, and then the pawl ring drives the pawl to move. Through the cooperation and separation of the pawl and the ratchet groove, different power input paths can be achieved. When the pawl is embedded in the ratchet groove, the power transmission path in the planetary structure can be changed through the mutual cooperation of the planetary carrier and the sun gear, the end cover and the secondary clutch, so as to achieve different transmission ratios, so that the driver can adjust the power input path and input speed of the two-wheeled vehicle according to the actual riding situation, improve the riding comfort, controllability and overall performance of the vehicle, so that the driver can better adapt to various road conditions and riding needs.

[0009] Preferably, a bearing seat is fixedly connected to the inner side of the pawl ring, the bearing seat is fixedly connected to the main shaft, and a return spring is arranged on the bearing seat, one end of the return spring is connected to the bearing seat, and the other end of the return spring is connected to the pawl ring. When the pawl ring drives the pawl to move by pulling the wire to change the power input path, the return spring can quickly restore the pawl ring to its initial position or a suitable standby position, so that the pawl can accurately cooperate with the ratchet groove after the power input path changes next time, thereby ensuring the smoothness and timeliness of the two-wheeled vehicle during the switching of different power input paths.

[0010] Preferably, a flywheel is fixedly connected to one end of the ring gear close to the rotating plug, and the flywheel can store and release energy during vehicle driving, thereby improving power utilization efficiency, enhancing vehicle operation efficiency and adapting to different riding conditions.

[0011] Preferably, the outer side of the primary clutch is connected to the hub, and the inner side of the primary clutch is connected to the ring gear. The primary clutch can flexibly control the power connection and disconnection between the ring gear and the hub according to the actual needs of the vehicle's driving. When different transmission effects are required, the primary clutch can selectively transmit the ring gear power to the hub, which can optimize the power transmission process, reduce power loss, and make the vehicle run more smoothly and efficiently. It also helps to protect the transmission and other related components, extend their service life, and improve the overall power performance and handling performance of the two-wheeled vehicle.

[0012] Preferably, the end cover is rotatably connected to the main shaft via a bearing, which provides a stable support and rotational basis for the hub, ensuring that the hub can rotate smoothly on the main shaft, thereby achieving effective power transmission.

[0013] Preferably, the outer side of the secondary clutch is connected to the end cover, and the inner side of the secondary clutch is connected to the sun gear. When power is transmitted to the secondary clutch, the secondary clutch can flexibly control the power connection state between the sun gear and other components according to different working conditions through the connection with the sun gear, optimize power distribution, and improve the acceleration performance and smoothness of the vehicle. At the same time, under certain special working conditions, the secondary clutch can also protect the sun gear and related transmission systems, reduce component wear, extend the service life of the entire transmission, and improve the overall performance and reliability of the two-wheeled vehicle.

[0014] Preferably, the planetary carrier corresponds to the end cover, and the end of the planetary carrier close to the end cover is connected to the sun gear through a bearing. The planetary carrier works in conjunction with the sun gear in a relatively stable position. Connecting the planetary carrier and the sun gear through bearings not only ensures that the planetary carrier and the sun gear can rotate smoothly relative to each other, but also can withstand various forces and torques generated during power transmission, which helps to optimize the operation of the planetary gear system, enables the planetary carrier to accurately transmit and distribute power between the sun gear, ring gear and other components, improves power transmission efficiency and speed change accuracy, while also enhancing the stability and reliability of the entire transmission structure, ensuring that the two-wheeled vehicle can achieve good performance under different driving conditions.

[0015] Preferably, a disc is connected to the outer side of the end cover, and an oil brake is provided on the disc. When the vehicle needs to slow down or stop, the oil brake applies friction to the disc to convert the rotational kinetic energy of the wheel into heat energy, thereby slowing down the wheel until it stops rotating. This braking method has the characteristics of rapid response, strong and stable braking force, and can ensure the safe driving of the vehicle under various driving conditions. At the same time, the combination of the disc and the oil brake also has good heat dissipation performance, which can effectively avoid overheating and failure of the braking system caused by long-term braking, thereby improving the reliability and durability of the braking system, and providing important guarantee for the driving safety of two-wheeled vehicles.

[0016] Preferably, the planetary carrier is fixedly connected to a plurality of evenly distributed planetary gears via a rotating shaft, and a plurality of the planetary gears are meshed with external teeth on the sun gear, and a plurality of the planetary gears are meshed with internal teeth of the ring gear at one end away from the sun gear. Through the meshing of the planetary gears with the external teeth of the sun gear and the internal teeth of the ring gear, power can be transmitted and speed can be adjusted, and the power of the sun gear is transmitted to the ring gear. Moreover, the even distribution and meshing method of the planetary gears can reasonably disperse the input power to each planetary gear, reduce the stress load of a single component, and improve the carrying capacity and durability of the entire transmission system. At the same time, different transmission ratios can be achieved by changing the relative motion relationship between the planetary carrier, the sun gear and the gear, so that the two-wheeled vehicle can obtain different speeds, meet the power and speed requirements under various driving conditions, and improve the power performance and adaptability of the two-wheeled vehicle.

[0017] Preferably, both ends of the main shaft are threadedly connected with fastening nuts. Through the threaded connection, the fastening nuts can firmly fix the various components connected to the main shaft on the main shaft to prevent the components from loosening or displacement due to vibration, force and other factors during the operation of the two-wheeled vehicle. The fastening nuts provide stable axial pressure to ensure the position accuracy of components such as the sun gear and the planetary carrier on the main shaft, so that they can work together accurately to achieve effective power transmission and normal speed change function. At the same time, this fastening method is also convenient for disassembly and installation during maintenance or assembly, which improves the maintainability and assembly efficiency of the two-wheeled vehicle transmission and ensures the reliability and stability of the transmission in long-term use.

[0018] The present invention has at least the following beneficial effects:

[0019] 1. The main shaft of the present invention cooperates with the ring gear, the primary clutch and the hub to form a transmission structure to achieve power output, and then different power input paths can be achieved by adjusting the cooperation and separation of the pawl and the ratchet groove on the assembly. When the pawl is embedded in the ratchet groove, the power transmission path in the planetary structure can be changed through the cooperation between the planetary carrier and the sun gear, the end cover and the secondary clutch to achieve different transmission ratios, thereby allowing the driver to adjust the power input path and input speed of the two-wheeled vehicle according to the actual riding situation, thereby improving the riding comfort, controllability and overall vehicle performance, so that the driver can better adapt to various road conditions and riding needs.

[0020] 2. In the present invention, when the pawl ring drives the pawl to move to change the power input path by pulling the wire, the return spring can quickly restore the pawl ring to the initial position or a suitable standby position, so that the pawl can accurately cooperate with the ratchet groove after the power input path changes next time, thereby ensuring the smoothness and timeliness of the two-wheeled vehicle in the process of switching between different speeds. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0022] Figure 1 A partial structural cross-sectional view provided by the present invention;

[0023] Figure 2 Partial structural diagram provided by the present invention Figure 1 ;

[0024] Figure 3 A schematic diagram of the overall structure provided by the present invention;

[0025] Figure 4 Partial structural diagram provided by the present invention Figure 2 ;

[0026] Figure 5 An exploded schematic diagram of a part of the structure provided by the present invention;

[0027] Figure 6 Partial structural diagram provided by the present invention Figure 3 ;

[0028] Figure 7 A schematic diagram of the structure of the planet carrier and the pawl seat provided by the present invention;

[0029] Figure 8 This is a schematic diagram of the planet carrier and sun gear structure provided by the present invention.

[0030] In the figure, 1, main shaft; 2, sun gear; 3, planetary carrier; 4, ring gear; 5, hub; 6, primary clutch; 7, ratchet groove; 8, adjustment assembly; 801, pawl seat; 802, slot; 803, pawl; 804, pawl ring; 805, rotating plug; 806, cable locking piece; 9, end cover; 10, secondary clutch; 11, bearing seat; 12, return spring; 13, flywheel; 14, disc; 15, oil brake; 16, planetary gear; 17, fastening nut. DETAILED DESCRIPTION

[0031] The following will describe the implementation methods of the present application in detail with the help of accompanying drawings and examples, so that the implementation process of how the present application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0032] like Figure 1 - Figure 8 As shown, the bidirectional transmission for a two-wheeled vehicle provided in this embodiment comprises a main shaft 1, a sun gear 2 is rotatably connected to the main shaft 1 through a bearing, a planet carrier 3 is arranged on the outside of the sun gear 2, a gear ring 4 is arranged on the outside of the planet carrier 3, a hub 5 is arranged on the outside of the gear ring 4, a primary clutch 6 is arranged between the hub 5 and the gear ring 4, and a ratchet groove 7 is opened at one end of the planet carrier 3, an adjustment component 8 is arranged on one side of the ratchet groove 7, and the other side of the adjustment component 8 corresponds to the sun gear 2, an end cover 9 is arranged on the side of the sun gear 2 away from the adjustment component 8, the end cover 9 is fixedly connected to the hub 5 by bolts, and a secondary clutch 10 is arranged between the end cover 9 and the hub 5;

[0033] The adjusting component 8 includes a pawl seat 801, which is fixedly mounted on the main shaft 1, and has two slots 802 on the pawl seat 801, and a pawl 803 is arranged inside the slot 802, and the pawl 803 corresponds to the ratchet groove 7, and the upper ends of the two pawls 803 are fixedly connected with a pawl ring 804, and the end of the pawl ring 804 away from the pawl 803 is fixedly connected with a rotating plug 805, and the rotating plug 805 is fixedly connected with a cable locking piece 806. The main shaft 1 cooperates with the ring gear 4, the primary clutch 6 and the hub 5 to form a transmission structure to achieve power output, and then the cable on the cable locking piece 806 is pulled to drive The rotating plug 805 rotates, and the ratchet ring 804 drives the ratchet 803 to move. Through the cooperation and separation of the ratchet 803 and the ratchet groove 7, different power input paths can be realized. When the ratchet 803 is embedded in the ratchet groove 7, the power transmission path in the planetary structure can be changed through the mutual cooperation of the planet carrier 3 and the sun gear 2, the end cover 9 and the secondary clutch 10, so as to realize different transmission ratios, so that the driver can adjust the power input path and input speed of the two-wheeled vehicle according to the actual riding situation, improve the riding comfort, controllability and overall performance of the vehicle, so that the driver can better adapt to various road conditions and riding needs;

[0034] Further, such as Figure 1 - Figure 8 As shown, the inner side of the ratchet ring 804 is fixedly connected with a bearing seat 11, the bearing seat 11 is fixedly connected to the main shaft 1, and a return spring 12 is arranged on the bearing seat 11, one end of the return spring 12 is connected to the bearing seat 11, and the other end of the return spring 12 is connected to the ratchet ring 804. When the ratchet ring 804 drives the ratchet 803 to move to realize the change of the power input path by pulling the wire, the return spring 12 can make the ratchet ring 804 quickly return to the initial position or the appropriate standby position, so that the ratchet 803 can accurately cooperate with the ratchet groove 7 after the power input path is changed next time, thereby ensuring the smoothness and timeliness of the two-wheeled vehicle in the process of switching between different power input paths;

[0035] Among them, Figure 1 - Figure 8 As shown, the flywheel 13 is fixedly connected to one end of the ring gear 4 near the rotating plug 805, the outer side of the primary clutch 6 is connected to the hub 5, and the inner side of the primary clutch 6 is connected to the ring gear 4, the end cover 9 is rotatably connected to the main shaft 1 through a bearing, the outer side of the secondary clutch 10 is connected to the end cover 9, and the inner side of the secondary clutch 10 is connected to the sun gear 2, the planet carrier 3 corresponds to the end cover 9, and the end of the planet carrier 3 near the end cover 9 is connected to the sun gear 2 through a bearing, the outer side of the end cover 9 is connected to a disc 14, and an oil brake 15 is arranged on the disc 14, the flywheel 13 can store and release energy during vehicle driving, improve power utilization efficiency, and enhance The vehicle running efficiency is improved and it can adapt to different riding conditions; through the primary clutch 6, the power transmission between the gear ring 4 and the hub 5 can be controlled as needed to achieve different transmission states; and the end cover 9 not only plays a sealing and supporting role, but the secondary clutch 10 inside it can regulate the power connection and separation between the sun gear 2 and other components; the disc 14 and the oil brake 15 on the outside of the end cover 9 form a braking system, which can apply braking force to the disc 14 through the oil brake 15 when necessary to slow down or stop the vehicle and ensure driving safety, thereby realizing the power transmission, speed control and safe braking functions of the two-wheeled vehicle, meeting the needs of the two-wheeled vehicle under various driving conditions;

[0036] Furthermore, if Figure 1As shown, the planet carrier 3 is fixedly connected with a plurality of evenly distributed planetary gears 16 through a rotating shaft, and the plurality of planetary gears 16 are all meshed with the outer teeth on the sun gear 2, and the ends of the plurality of planetary gears 16 away from the sun gear 2 are meshed with the inner teeth of the ring gear 4. Through the meshing of the planetary gears 16 with the outer teeth of the sun gear 2 and the inner teeth of the ring gear 4, power can be transmitted and speed can be adjusted, and the power of the sun gear 2 is transmitted to the ring gear 4. At the same time, by changing the relative motion relationship among the planet carrier 3, the sun gear 2 and the ring gear 4, different transmission ratios are achieved, so that the two-wheeled vehicle obtains different speeds, meets the requirements for power and speed under various driving conditions, and improves the power performance and adaptability of the two-wheeled vehicle.

[0037] Furthermore, both ends of the main shaft 1 are threadedly connected with fastening nuts 17. Through the threaded connection, the fastening nuts 17 can tightly fix the components connected to the main shaft 1 on the main shaft 1 to prevent these components from loosening or shifting during the operation of the two-wheeled vehicle, thereby ensuring a firm connection between the components of the two-way transmission and ensuring the normal operation of the transmission.

[0038] like Figure 1 - Figure 8 As shown, the principle of a two-wheeled vehicle bidirectional transmission provided in this embodiment is as follows:

[0039] First, the rotation direction of the flywheel 13 when the two-wheeled vehicle moves forward is defined as forward rotation, and the rotation direction of the flywheel 13 when moving backward is reverse rotation. When the flywheel 13 rotates forward, the flywheel 13 cooperates with the gear ring 4, the primary clutch 6 and the hub 5 through the main shaft 1 to form a transmission structure to achieve power output, and the two-wheeled vehicle moves forward. By pulling the pull wire on the pull wire locking member 806, the rotating plug 805 is driven to rotate, so that the ratchet ring 804 drives the ratchet 803 to move. At this time, the ratchet 803 is embedded in the ratchet groove 7, driving the flywheel 13 to reverse, and the flywheel 13 drives the planetary carrier 3 to rotate through the main shaft 1, and then drives the sun gear 2, the end cover 9 and the secondary clutch 10 through a plurality of planetary gears 16 to drive the hub 5 to rotate, to achieve power output, and the two-wheeled vehicle moves forward, so that the driver can adjust the power input path and input speed of the two-wheeled vehicle according to the actual riding situation, improve the riding comfort, controllability and overall performance of the vehicle, so that the driver can better adapt to various road conditions and riding needs;

[0040] When the flywheel 13 is transmitting forward, the power can be input through the ring gear 4 and output from the sun gear 2. The sun gear 2 rotates reversely relative to the ring gear 4. At this time, although the planetary structure realizes speed change, it cannot output the power from the secondary clutch 10. Therefore, the power input from the flywheel 13 is output to the hub 5 through the ring gear to the first clutch 6, and the transmission ratio is 1:1.

[0041] When the flywheel 13 reverses, power can be input through the ring gear 4 and output through the sun gear 2. At this time, the sun gear 2 reverses relative to the ring gear 4 (at this time, it rotates forward relative to the tire), and power is output from the secondary clutch 10 to the hub 5, with a transmission ratio of 1:1.29.

[0042] For example, certain words are used in the specification and claims to refer to specific components. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. This specification and claims do not use differences in names as a way to distinguish components, but use differences in the functions of components as the criteria for distinction. For example, "including" mentioned throughout the specification and claims is an open term, so it should be interpreted as "including but not limited to". "Approximately" means that within an acceptable error range, those skilled in the art can solve technical problems within a certain error range and basically achieve technical effects.

[0043] It should be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a product or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such product or system. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the product or system including the elements.

[0044] The above description shows and describes several preferred embodiments of the present invention, but as mentioned above, it should be understood that the present invention is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the invention concept described herein through the above teachings or the technology or knowledge of the relevant field. Changes and variations made by those skilled in the art do not depart from the spirit and scope of the present invention, and should be within the scope of protection of the claims attached to the present invention.

Claims

1. A two-wheeled vehicle bidirectional transmission, comprising a main shaft (1), characterized in that: The main shaft (1) is rotatably connected to a sun gear (2) via a bearing, a planet carrier (3) is arranged on the outer side of the sun gear (2), a gear ring (4) is arranged on the outer side of the planet carrier (3), a hub (5) is arranged on the outer side of the gear ring (4), a primary clutch (6) is arranged between the hub (5) and the gear ring (4), a ratchet groove (7) is opened at one end of the planet carrier (3), an adjustment component (8) is arranged on one side of the ratchet groove (7), the other side of the adjustment component (8) corresponds to the sun gear (2), an end cover (9) is arranged on the side of the sun gear (2) away from the adjustment component (8), the end cover (9) is fixedly connected to the hub (5) via bolts, and a secondary clutch (10) is arranged between the end cover (9) and the hub (5); The adjustment assembly (8) comprises a pawl seat (801), the pawl seat (801) is fixedly mounted on the main shaft (1), and the pawl seat (801) is provided with two slots (802), a pawl (803) is arranged inside the slot (802), the pawl (803) corresponds to the ratchet slot (7), and the upper ends of the two pawls (803) are fixedly connected to a pawl ring (804), and one end of the pawl ring (804) away from the pawl (803) is fixedly connected to a rotating plug (805), and a pull wire locking member (806) is fixedly connected to the rotating plug (805).

2. A two-wheeled vehicle bidirectional transmission according to claim 1, characterized in that: A bearing seat (11) is fixedly connected to the inner side of the ratchet ring (804), the bearing seat (11) is fixedly connected to the main shaft (1), and a return spring (12) is provided on the bearing seat (11), one end of the return spring (12) is connected to the bearing seat (11), and the other end of the return spring (12) is connected to the ratchet ring (804).

3. A two-wheeled vehicle bidirectional transmission according to claim 1, characterized in that: One end of the gear ring (4) close to the rotating plug (805) is fixedly connected to a flywheel (13).

4. A two-wheeled vehicle bidirectional transmission according to claim 1, characterized in that: The outer side of the primary clutch (6) is connected to the hub (5), and the inner side of the primary clutch (6) is connected to the gear ring (4).

5. A two-wheeled vehicle bidirectional transmission according to claim 1, characterized in that: The end cover (9) is rotatably connected to the main shaft (1) via a bearing.

6. A two-wheeled vehicle bidirectional transmission according to claim 1, characterized in that: The outer side of the secondary clutch (10) is connected to the end cover (9), and the inner side of the secondary clutch (10) is connected to the sun gear (2).

7. A two-wheeled vehicle bidirectional transmission according to claim 1, characterized in that: The planet carrier (3) corresponds to the end cover (9), and one end of the planet carrier (3) close to the end cover (9) is connected to the sun gear (2) via a bearing.

8. A two-wheeled vehicle bidirectional transmission according to claim 7, characterized in that: The outer side of the end cover (9) is connected to a disc (14), and an oil brake (15) is arranged on the disc (14).

9. A two-wheeled vehicle bidirectional transmission according to claim 8, characterized in that: The planet carrier (3) is fixedly connected to a plurality of evenly distributed planetary gears (16) via a rotating shaft, and the plurality of planetary gears (16) are meshed with the external teeth on the sun gear (2), and the ends of the plurality of planetary gears (16) away from the sun gear (2) are meshed with the internal teeth of the ring gear (4).

10. A two-wheeled vehicle bidirectional transmission according to claim 1, characterized in that: Both ends of the main shaft (1) are threadedly connected with fastening nuts (17).

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