Alloy gear set with self-lubricating effect

Abstract

The application relates to the technical field of alloy gear sets, and discloses an alloy gear set with a self-lubricating effect, which comprises a shell, a working mechanism is arranged in the shell, an oil outlet mechanism is arranged on the surface of the working mechanism, and an adjusting mechanism is arranged on the outer surface of the shell. The alloy gear set with the self-lubricating effect is uniformly flowed to the surface of a first gear wheel through a pre-designed oil outlet groove under the action of gravity, the lubricating oil is rapidly spread on the surface of the gear wheel, a uniform and stable oil film is formed, the oil film is like an invisible protective film, the metal surface of the gear wheel is separated, the friction between the gear surfaces is changed from dry friction to oil film friction, the change of the friction form greatly reduces the friction coefficient, significantly reduces the wear of the gear surfaces in the process of high-speed rotation and frequent meshing, effectively prolongs the service life of the gear, and ensures the stable operation of the alloy gear set under long-time and high-strength working conditions.

Description

Technical Field

[0001] This invention relates to the field of alloy gear set technology, specifically to an alloy gear set with self-lubricating effect. Background Technology

[0002] Alloy gear sets are gear combinations made of alloy materials composed of various metallic elements. They typically contain two or more meshing gears, which transmit power, change speed, and convert torque through the meshing of the gear teeth. They have good toughness, corrosion resistance, and low noise. They have low density, high elastic modulus, and are easy to process and form, making them suitable for manufacturing gears with complex shapes. However, their hardness and strength are relatively low, and they are prone to wear. They are not suitable for high torque and high load conditions. Factors such as transmission ratio, torque, speed, and load distribution need to be considered to determine parameters such as gear module, number of teeth, tooth width, and helix angle. At the same time, the overall structural design, including gear layout and shaft support method, must also be considered to ensure the transmission efficiency and stability of the gear set.

[0003] Patent publication number CN 208281458 U discloses a gear whose teeth include a tooth core and a rotating sleeve fitted around the tooth core. The tooth core and the gear disc are integrally formed. The rotating sleeve is provided with a first mechanism, and the tooth core is provided with a second mechanism. The first and second mechanisms are matched, allowing the rotating sleeve to rotate coaxially relative to the tooth core. The gear of this application has a double-layered structure with teeth that can rotate relative to each other, making it suitable for testing the valve stem lifting performance of indoor fire hydrants. It can reduce interfering friction during the testing process, resulting in more accurate test results.

[0004] The applicant believes that the gear has the following drawbacks: it does not have a self-lubricating function during rotation, which leads to increased wear on the tooth surface during high-speed rotation and frequent meshing, reducing the service life of the gear, and thus has defects. Summary of the Invention

[0005] The purpose of this invention is to provide an alloy gear set with self-lubricating effect to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an alloy gear set with self-lubricating effect, comprising a housing, a working mechanism disposed inside the housing, an oil outlet mechanism disposed on the surface of the working mechanism, and an adjustment mechanism disposed on the outer surface of the housing.

[0007] The oil outlet mechanism includes a fixed bearing, which is fixedly connected to the surface of the housing. An output shaft is fixedly connected to the inner ring of the fixed bearing. A first large gear is fixedly connected to the surface of the output shaft. An oil outlet groove is formed on the surface of the first large gear. A blocking plate is inserted into the oil outlet groove. A support base is fixedly connected to the bottom of the blocking plate. An oil placement groove is formed inside the first large gear. The oil placement groove is designed in a ring shape.

[0008] Preferably, both sides of the support base are fixedly connected to horizontal plates, and a support member is fixedly connected between the two horizontal plates. A support rod is slidably connected inside the support member, and the support rod is fixedly connected to the top of the support base. In the mechanical transmission system, when the support base begins to move, its internal structural design ensures the stability of the entire process. A high-precision sliding fit structure is adopted between the support member and the support rod. The support member is tightly fitted to the surface of the support rod. As the support base moves, the support member slides smoothly along the axial direction of the support rod. This sliding process is not a simple linear displacement. The sliding surface of the support member is finely polished to ensure a smooth transition between the support member and the support rod. The surface roughness of the support rod reaches the micron level, which greatly reduces frictional resistance during sliding. At the same time, a special guide structure is designed inside the support component, which ensures that the support component always maintains coaxiality with the support rod during sliding, avoiding deviation or wobbling. The advantage of this structural design is that the support component can slide stably on the surface of the support rod, whether the support seat is moving quickly or adjusting its position slowly. This provides reliable support and guidance for the support seat, ensuring the stability of the support seat throughout the entire movement process and effectively avoiding equipment failure or accuracy reduction problems that may be caused by wobbling or deviation.

[0009] Preferably, a vertical rod is slidably connected within the horizontal plate. A limiting plate is fixedly connected to the top of the vertical rod, and the limiting plate is disposed on the top of the support base. A connecting plate is fixedly connected to the bottom of the vertical rod, and a first fixing plate is fixedly connected to the bottom of the connecting plate. The first fixing plate is fixedly connected within the oil tank. In this device, a carefully designed limiting plate is specially provided. Its unique structure and installation position enable it to accurately limit the movement of the vertical rod. When the vertical rod moves within the horizontal plate, the limiting plate acts like a loyal guardian, constantly playing its crucial role. By closely cooperating with specific parts of the vertical rod, it physically restricts the displacement range of the vertical rod, effectively preventing the vertical rod from falling off within the horizontal plate due to various factors such as vibration and external impact, thereby ensuring the stability and safety of the entire device.

[0010] Preferably, a spring is sleeved on the surface of the vertical rod, and the spring is disposed between the horizontal plate and the connecting plate. Two horizontal plates are provided, arranged symmetrically. In mechanical systems, the elastic potential energy characteristic of springs is often utilized. When a spring is stretched or compressed, it stores elastic potential energy. Based on this characteristic, when the spring is connected to the blocking plate, once the external force is removed, the spring generates a restoring force using its stored elastic potential energy, thereby achieving the purpose of resetting the blocking plate.

[0011] Preferably, the adjusting mechanism includes an internal spline inserted into the output shaft. A connecting member is rotatably connected to the surface of the internal spline, and a second fixing plate is fixedly connected to the bottom of the connecting member. A connecting rod is slidably connected within the second fixing plate and fixedly connected to the surface of the housing. In complex mechanical transmission structures, the output shaft plays a crucial role in power transmission. When the internal spline slides inside the output shaft, the stability of its movement significantly impacts the performance of the entire transmission system. At this point, the cooperation between the second fixing plate and the connecting rod plays a key role. The second fixing plate fits tightly against the surface of the connecting rod and slides synchronously on the surface of the connecting rod as the internal spline slides. This structural design can constrain and support the movement of the internal spline from multiple directions, effectively preventing instability such as wobbling or offset during the sliding process, thereby ensuring the stability of the internal spline's movement and laying a solid foundation for the reliable operation of the entire mechanical transmission system.

[0012] Preferably, a mounting plate is fixedly connected to the surface of the housing, and a placement plate is fixedly connected to the side of the mounting plate opposite to the housing. A cylinder is fixedly connected between the placement plate and the connector. Two cylinders are provided, and the two cylinders are arranged symmetrically. The cylinders serve as a power source, and the pistons inside them generate linear motion under the push of air pressure. This motion drives the connector to move precisely through a specific connecting mechanism. During this process, the internal spline, which is closely connected to the connector, slides smoothly along the spline groove inside the output shaft.

[0013] Preferably, the working mechanism includes a first pinion, which meshes with the surface of a first large gear. A first support shaft is fixedly connected to the inner ring of the first pinion, a second large gear is fixedly connected to the surface of the first support shaft, and a third pinion meshes with the surface of the second large gear.

[0014] Preferably, the inner ring of the third pinion is fixedly connected to a second support shaft, the surface of the second support shaft is fixedly connected to a third large gear, the surface of the third large gear is meshed with a second pinion, the inner ring of the second pinion is fixedly connected to a connecting shaft, the surface of the connecting shaft is fixedly connected to a bearing, and the bearing is fixedly connected to the surface of the housing. The first large gear starts to rotate under the action of torque. Since the first large gear and the first pinion mesh with each other, the rotation of the first large gear will drive the first pinion to rotate at high speed. At the same time, the first pinion meshes synchronously with the second large gear and the third pinion, thereby driving the second large gear and the third pinion to rotate synchronously. The third large gear and the second pinion are also in a meshing state. Their synchronous rotation ultimately achieves the purpose of efficient operation of the alloy gear set, converting the input power into various forms of mechanical motion to meet the working needs of different mechanical equipment.

[0015] Compared with the prior art, the present invention provides an alloy gear set with self-lubricating effect, which has the following beneficial effects: 1. This self-lubricating alloy gear set, under the influence of gravity, flows evenly to the surface of the first large gear through a pre-designed oil outlet groove. The lubricating oil quickly spreads on the gear surface, forming a uniform and stable oil film. This oil film acts like an invisible protective film, separating the metal surfaces of the gears and changing the friction between the tooth surfaces from dry friction to oil film friction. This change in friction mode greatly reduces the coefficient of friction, significantly reduces wear on the tooth surfaces during high-speed rotation and frequent meshing, effectively extends the service life of the gears, and ensures the stable operation of the alloy gear set under long-term, high-intensity working conditions.

[0016] 2. This self-lubricating alloy gear set uses a cylinder as its power source. The piston inside the cylinder moves linearly under the pressure of air, which in turn drives the connecting parts to move precisely through a specific connecting mechanism. During this process, the internal spline, which is closely connected to the connecting parts, slides smoothly along the spline groove inside the output shaft. This ingenious sliding connection design allows the length of the output shaft to be precisely adjusted according to actual needs, greatly enhancing the applicability and flexibility of the equipment and meeting the usage requirements of various complex working scenarios.

[0017] 3. This self-lubricating alloy gear set has a first pinion that meshes synchronously with the second and third pinions, thereby driving the second and third pinions to rotate synchronously. The third pinion is also meshed with the second pinion. Their synchronous rotation ultimately achieves the goal of efficient operation of the alloy gear set, converting the input power into various forms of mechanical motion to meet the working requirements of different mechanical equipment. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort: Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic cross-sectional view of the overall structure of the present invention; Figure 3 This is a schematic diagram of the oil outlet mechanism of the present invention; Figure 4 This is a schematic diagram of the oil outlet mechanism of the present invention. Figure 5 for Figure 3 Enlarged schematic diagram of the structure at point A in the middle; Figure 6 This is a schematic diagram of the adjustment mechanism of the present invention; Figure 7 This is a schematic diagram of the working mechanism of the present invention.

[0019] In the diagram: 1. Housing; 2. Oil outlet mechanism; 21. Vertical rod; 22. First fixing plate; 23. Spring; 24. Blocking plate; 25. Support rod; 26. Support component; 27. Limiting plate; 28. Horizontal plate; 29. ​​Support seat; 201. Connecting plate; 202. First large gear; 3. Adjusting mechanism; 31. Mounting plate; 32. Second fixing plate; 33. Cylinder; 34. Placement plate; 35. Internal spline; 36. Connecting component; 37. Connecting rod; 4. Working mechanism; 41. Second large gear; 42. First support shaft; 43. First small gear; 44. Bearing; 45. Second small gear; 46. Third large gear; 47. Second support shaft; 48. Third small gear. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] This invention provides a technical solution: Example 1:

[0022] Combination Figure 1-2 to Figure 3-5A self-lubricating alloy gear set includes a housing 1, a working mechanism 4 inside the housing 1, an oil outlet mechanism 2 on the surface of the working mechanism 4, and an adjustment mechanism 3 on the outer surface of the housing 1.

[0023] The oil outlet mechanism 2 includes a fixed bearing, which is fixedly connected to the surface of the housing 1. An output shaft is fixedly connected to the inner ring of the fixed bearing. A first large gear 202 is fixedly connected to the surface of the output shaft. An oil outlet groove is opened on the surface of the first large gear 202. A blocking plate 24 is inserted into the oil outlet groove. A support seat 29 is fixedly connected to the bottom of the blocking plate 24. An oil placement groove is opened inside the first large gear 202. The oil placement groove is designed in a ring shape.

[0024] Furthermore, horizontal plates 28 are fixedly connected to both sides of the support base 29, and a support member 26 is fixedly connected between the two horizontal plates 28. A support rod 25 is slidably connected inside the support member 26, and the support rod 25 is fixedly connected to the top of the support base 29. In the mechanical transmission system, when the support base 29 begins to move, its internal structural design ensures the stability of the entire process. A high-precision sliding fit structure is adopted between the support member 26 and the support rod 25. The support member 26 is tightly fitted to the surface of the support rod 25. As the support base 29 moves, the support member 26 slides smoothly along the axial direction of the support rod 25. This sliding process is not a simple linear displacement. The sliding surface of the support member 26 has been finely polished. The surface roughness of the support rod 25 is matched to that of micrometers, which greatly reduces the frictional resistance during the sliding process. At the same time, a special guide structure is designed inside the support member 26, which ensures that the support member 26 can always maintain coaxiality with the support rod 25 during sliding, avoiding deviation or shaking. The advantage of this structural design is that the support member 26 can slide stably on the surface of the support rod 25, whether the support seat 29 is moving quickly or adjusting its position slowly. This provides reliable support and guidance for the support seat 29, ensuring the stability of the support seat 29 throughout the movement process and effectively avoiding equipment failure or accuracy reduction problems that may be caused by shaking or deviation.

[0025] Furthermore, a vertical rod 21 is slidably connected within the horizontal plate 28. A limiting plate 27 is fixedly connected to the top of the vertical rod 21, and the limiting plate 27 is located on the top of the support base 29. A connecting plate 201 is fixedly connected to the bottom of the vertical rod 21, and a first fixing plate 22 is fixedly connected to the bottom of the connecting plate 201. The first fixing plate 22 is fixedly connected within the oil tank. In this device, a carefully designed limiting plate 27 is specially designed. Its unique structure and installation position allow it to precisely limit the vertical rod 21. When the vertical rod 21 moves within the horizontal plate 28, the limiting plate 27 acts like a loyal guardian, constantly playing its crucial role. By closely engaging with specific parts of the vertical rod 21, it physically restricts the displacement range of the vertical rod 21, effectively preventing the vertical rod 21 from falling off within the horizontal plate 28 due to various factors such as vibration and external impact, thereby ensuring the stability and safety of the entire device.

[0026] Furthermore, a spring 23 is sleeved on the surface of the vertical rod 21. The spring 23 is positioned between the horizontal plate 28 and the connecting plate 201. There are two horizontal plates 28 arranged symmetrically. In mechanical systems, the elastic potential energy characteristic of the spring 23 is often utilized. When the spring 23 is stretched or compressed, it stores elastic potential energy. Based on this characteristic, when the spring 23 is connected to the blocking plate 24, once the external force is removed, the spring 23 generates a restoring force using its stored elastic potential energy, thereby achieving the purpose of resetting the blocking plate 24.

[0027] Example 2:

[0028] See Figure 6 Based on Embodiment 1, the adjustment mechanism 3 further includes an internal spline 35, which is inserted into the output shaft. A connecting member 36 is rotatably connected to the surface of the internal spline 35, and a second fixing plate 32 is fixedly connected to the bottom of the connecting member 36. A connecting rod 37 is slidably connected inside the second fixing plate 32 and is fixedly connected to the surface of the housing 1. In complex mechanical transmission structures, the output shaft plays a crucial role in power transmission. When the internal spline 35 slides inside the output shaft, the stability of its movement has a significant impact on the performance of the entire transmission system. At this time, the cooperation between the second fixing plate 32 and the connecting rod 37 plays a key role. The second fixing plate 32 is tightly fitted to the surface of the connecting rod 37 and slides synchronously on the surface of the connecting rod 37 as the internal spline 35 slides. This structural design can constrain and support the movement of the internal spline 35 from multiple directions, effectively avoiding unstable phenomena such as shaking and displacement of the internal spline 35 during the sliding process, thereby ensuring the stability of the internal spline 35 during its movement and laying a solid foundation for the reliable operation of the entire mechanical transmission system.

[0029] Furthermore, a mounting plate 31 is fixedly connected to the surface of the housing 1. A placement plate 34 is fixedly connected to the side of the mounting plate 31 away from the housing 1. A cylinder 33 is fixedly connected between the placement plate 34 and the connector 36. Two cylinders 33 are provided and are arranged symmetrically. The cylinder 33 serves as a power source. The piston inside the cylinder generates linear motion under the push of air pressure, which in turn drives the connector 36 to move precisely through a specific connecting mechanism. During this process, the internal spline 35, which is closely connected to the connector 36, will slide smoothly along the spline groove inside the output shaft.

[0030] Example 3:

[0031] See Figure 7 Furthermore, based on Embodiment 1 and Embodiment 2, the working mechanism 4 further includes a first pinion 43, which meshes with the surface of a first large gear 202. The inner ring of the first pinion 43 is fixedly connected to a first support shaft 42, and the surface of the first support shaft 42 is fixedly connected to a second large gear 41. The surface of the second large gear 41 is meshed with a third pinion 48.

[0032] Furthermore, the inner ring of the third pinion 48 is fixedly connected to the second support shaft 47, the surface of the second support shaft 47 is fixedly connected to the third large gear 46, the surface of the third large gear 46 is meshed with the second pinion 45, the inner ring of the second pinion 45 is fixedly connected to the connecting shaft, the surface of the connecting shaft is fixedly connected to the bearing 44, and the bearing 44 is fixedly connected to the surface of the housing 1. The first large gear 202 starts to rotate under the action of torque. Since the first large gear 202 and the first pinion 43 mesh with each other, the rotation of the first large gear 202 will drive the first pinion 43 to rotate at high speed. At the same time, the first pinion 43 also meshes synchronously with the second large gear 41 and the third pinion 48, thereby driving the second large gear 41 and the third pinion 48 to rotate synchronously. The third large gear 46 and the second pinion 45 are also in a meshing state. Their synchronous rotation ultimately achieves the purpose of efficient operation of the alloy gear set, converting the input power into various forms of mechanical motion to meet the working needs of different mechanical equipment.

[0033] In actual operation, the flexible adjustment of the output shaft length in the mechanical transmission system is crucial. When the actual working conditions have different requirements for the output shaft length, the operator only needs to start the cylinder 33. The cylinder 33 serves as a power source, and the piston inside it generates linear motion under the push of air pressure. Then, it drives the connecting piece 36 to move precisely through a specific connecting mechanism. During this process, the internal spline 35, which is closely connected to the connecting piece 36, will slide smoothly along the spline groove inside the output shaft. This ingenious sliding connection method allows the length of the output shaft to be precisely adjusted according to actual needs, greatly enhancing the applicability and flexibility of the equipment and meeting the usage requirements of various complex working scenarios. When the alloy gear set needs to be put into operation, the output shaft must first be reliably connected to an external drive source. The external drive source can be a motor, engine, or other power device that can provide stable and strong power output. After the connection is completed, the drive source is started, and the torque output by the drive source is transmitted to the alloy gear set through the output shaft. At this time, the first large gear 202 begins to rotate under the action of torque. Since the first large gear 202 meshes with the first small gear 43, the rotation of the first large gear 202 will drive the first small gear 43 to rotate at high speed. At the same time, the first small gear 43 meshes synchronously with the second large gear 41 and the third small gear 48, thereby driving the second large gear 41 and the third small gear 48 to rotate synchronously. The third large gear 46 and the second small gear 45 are also in a meshing state. Their synchronous rotation ultimately achieves the purpose of efficient operation of the alloy gear set, converting the input power into various forms of mechanical motion to meet the working needs of different mechanical equipment. During the continuous rotation of the first large gear 202 and the first small gear 43, there is a clever lubrication control mechanism. When the teeth on the surface of the first small gear 43 contact the gap of the first large gear 202, the teeth will exert a squeezing force on the blocking plate 24. The blocking plate 24 is connected to the horizontal plate 28 through a specific connection structure. Under the action of the squeezing force, the horizontal plate 28 will overcome its own weight and friction and slide smoothly downward on the surface of the vertical rod 21. As the horizontal plate 28 slides down, the support seat 29, which was originally in close contact with the top of the oil tank, will gradually detach, thus breaking the sealed state of the oil tank and allowing the contents of the oil tank to be exposed. The stored lubricating oil, under the influence of gravity, flows evenly onto the surface of the first large gear 202 through the pre-designed oil outlet groove. The lubricating oil quickly spreads on the gear surface, forming a uniform and stable oil film. This oil film acts like an invisible protective film, separating the metal surfaces of the gears and changing the friction between the tooth surfaces from dry friction to oil film friction. This change in friction mode greatly reduces the coefficient of friction, significantly reduces wear on the tooth surfaces during high-speed rotation and frequent meshing, effectively extends the service life of the gears, and ensures the stable operation of the alloy gear set under long-term, high-intensity working conditions.

[0034] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. An alloy gear set with self-lubricating effect, comprising a housing (1), characterized in that: The housing is provided with a working mechanism (4), the working mechanism (4) is provided with an oil outlet mechanism (2) on its surface, and the housing (1) is provided with an adjustment mechanism (3) on its outer surface. The oil outlet mechanism (2) includes a fixed bearing, which is fixedly connected to the surface of the housing (1). An output shaft is fixedly connected to the inner ring of the fixed bearing. A first large gear (202) is fixedly connected to the surface of the output shaft. An oil outlet groove is opened on the surface of the first large gear (202). A block plate (24) is inserted into the oil outlet groove. A support seat (29) is fixedly connected to the bottom of the block plate (24). An oil placement groove is opened in the first large gear (202). The oil placement groove is designed in a ring shape. The support base (29) has horizontal plates (28) fixedly connected to both sides, and a support member (26) is fixedly connected between the two horizontal plates (28). A support rod (25) is slidably connected inside the support member (26). A vertical rod (21) is slidably connected inside the horizontal plate (28). A limiting plate (27) is fixedly connected to the top of the vertical rod (21). The limiting plate (27) is set on the top of the support base (29). A connecting plate (201) is fixedly connected to the bottom of the vertical rod (21). A first fixing plate (22) is fixedly connected to the bottom of the connecting plate (201). The first fixing plate (22) is fixedly connected to the oil tank. A spring (23) is sleeved on the surface of the vertical rod (21). The spring (23) is disposed between the horizontal plate (28) and the connecting plate (201). There are two horizontal plates (28), which are arranged symmetrically. The adjustment mechanism (3) includes an internal spline (35), which is inserted into the output shaft. A connector (36) is rotatably connected to the surface of the internal spline (35). A second fixing plate (32) is fixedly connected to the bottom of the connector (36). A connecting rod (37) is slidably connected inside the second fixing plate (32). The connecting rod (37) is fixedly connected to the surface of the housing (1). A mounting plate (31) is fixedly connected to the surface of the housing (1). A placement plate (34) is fixedly connected to the side of the mounting plate (31) away from the housing (1). A cylinder (33) is fixedly connected between the placement plate (34) and the connector (36). There are two cylinders (33), and the two cylinders (33) are arranged symmetrically. The working mechanism (4) includes a first pinion (43), which meshes with the surface of a first large gear (202). The inner ring of the first pinion (43) is fixedly connected to a first support shaft (42), and the surface of the first support shaft (42) is fixedly connected to a second large gear (41). The surface of the second large gear (41) is meshed with a third pinion (48). The inner ring of the third pinion (48) is fixedly connected to the second support shaft (47), the surface of the second support shaft (47) is fixedly connected to the third large gear (46), the surface of the third large gear (46) is meshed with the second pinion (45), the inner ring of the second pinion (45) is fixedly connected to the connecting shaft, the surface of the connecting shaft is fixedly connected to the bearing (44), and the bearing (44) is fixedly connected to the surface of the housing (1).

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