Transmission structure and power device

By providing a buffer member in the transmission structure to buffer the contact between the transmission parts, the problem of easy damage to the transmission structure during the energy transfer process is solved, and the service life and stability of the power device are improved.

CN222977273UActive Publication Date: 2025-06-13SICHUAN YIJUWEI TECHNOLOGY CO LTD
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Patent Information

Application Number
CN202422401830.7
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-09-30
Publication Date
2025-06-13
Estimated Expiration
2034-09-30

AI Technical Summary

Technical Problem

In the existing power transmission technology, the transmission structure is prone to damage during the energy transmission process, and the replacement of the transmission structure is complicated, resulting in a short service life.

Method used

A transmission structure is designed, by providing a first transmission member, a second transmission member and a buffer member, the buffer member acts as a buffer in the installation gap to avoid direct contact between the first tooth and the second tooth, thereby reducing the possibility of damage.

Benefits of technology

Effectively avoid or reduce the possibility of damage to the transmission structure, and improve the service life of the transmission structure and power plant.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a transmission structure and a power device. The transmission structure comprises a first transmission part, a second transmission part and a buffer part. A first transmission part with a first tooth body and a second transmission part with a second tooth body are arranged, the first tooth body is meshed with the second tooth body, and a mounting gap which is distributed in the circumferential direction of the first transmission part and the second transmission part and extends in the radial direction of the first transmission part and the second transmission part is reserved between the first tooth body and the second tooth body; the buffer part is arranged in the mounting gap, the buffer part can play a role in buffering, direct contact of the first tooth body and the second tooth body is avoided, the buffer part can be damaged before the first tooth body and the second tooth body even if the stress of the first tooth body and the second tooth body is too large, and then the effects of reminding a user and protecting the first tooth body and the second tooth body can be achieved. According to the transmission structure provided by the embodiment of the utility model, the possibility of damage to the transmission structure can be effectively avoided or reduced, so that the service life of the transmission structure is prolonged. The invention further discloses a power device.
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Description

Technical Field

[0001] The present application relates to the technical field of power transmission, and particularly relates to a transmission structure and a power device. Background Art

[0002] A power device can convert electrical energy into kinetic energy and is widely used in production equipment. In a power device, there is a structure called a transmission structure for delivering kinetic energy to a processing unit. The transmission structure can transfer kinetic energy to different processing units according to the requirements of the processing unit. As a transfer station for energy transfer and energy conversion, the transmission structure is prone to damage during the process of receiving and transmitting energy. And if the transmission structure is damaged, replacing the transmission structure is also a relatively complex process.

[0003] Therefore, providing a transmission structure and a power device with a relatively long service life is a technical problem that those skilled in the art urgently need to solve. Summary of the Utility Model

[0004] The present application discloses a transmission structure and a power device to at least partially solve the above technical problems.

[0005] To solve the above problems, the present application adopts the following technical solutions:

[0006] On the one hand, an embodiment of the present application provides a transmission structure, including: a first transmission member, a second transmission member, and a buffer member. One end of the first transmission member is connected to a power source, and the other end of the first transmission member has a first tooth body protruding in a first direction. One end of the second transmission member has a second tooth body protruding in a second direction, the second direction being opposite to the first direction, the first tooth body meshing with the second tooth body, and there is an installation gap between the first tooth body and the second tooth body. The installation gap is distributed circumferentially around the first transmission member and the second transmission member and extends in the radial direction of the first transmission member and the second transmission member. The other end of the second transmission member is used for outputting power. The buffer member is disposed in the installation gap, and the hardness of the buffer member is the same as that of the first tooth body and the second tooth body.

[0007] In one embodiment, the buffer member has opposite first and second end portions, the size of the first end portion being larger than that of the second end portion. When the buffer member is disposed in the installation gap, the first end portion is flush with the outer surfaces of the first tooth body and the second tooth body.

[0008] In one embodiment, the transmission structure is further provided with a support block, and the support block is disposed on the end face of the first transmission member and / or the end face of the second transmission member and is located inside the first tooth body and / or inside the second tooth body.

[0009] In one embodiment, a plurality of the support blocks are provided, and the buffer member is filled between the plurality of support blocks.

[0010] In one embodiment, in the first direction, an end face of the support block is flush with an end face of the first tooth body and / or the second tooth body.

[0011] In one embodiment, the buffer member is detachably provided between the first tooth body and the second tooth body.

[0012] On the other hand, an embodiment of the present application further provides a power device, including the transmission structure, a first connecting member of the power main body, and a second connecting member as described above. The power main body is connected to the first transmission member through the first connecting member. The power main body is configured to provide power and drive the first transmission member to rotate, and the second connecting member is connected to an end of the second transmission member away from the first transmission member.

[0013] In one embodiment, a first connection hole is formed through the first transmission member in the first direction, the first connecting member is disposed in the first connection hole, a second connection hole is formed through the second transmission member in the second direction, the second connecting member is disposed in the second connection hole, and the first connection hole and the second connection hole are coaxially arranged.

[0014] In one embodiment, a diameter of the first connection hole is greater than or equal to a diameter of the second connecting member.

[0015] In one embodiment, a retractable protrusion is provided on a partial area of a surface of the first connecting member. When the first connecting member is disposed in the first connection hole, the protrusion abuts against an inner wall of the first connection hole.

[0016] The technical solution adopted by the present application can achieve the following beneficial effects:

[0017] The transmission structure provided by the embodiment of the present application sets a first transmission member with a first tooth body and a second transmission member with a second tooth body, meshes the first tooth body and the second tooth body, and leaves an installation gap circumferentially distributed along the first transmission member and the second transmission member and extending in the radial direction of the first transmission member and the second transmission member between the first tooth body and the second tooth body. Then, a buffer member is arranged in the installation gap. The buffer member can be used to play a buffering role to avoid direct contact between the first tooth body and the second tooth body. At the same time, setting the hardness of the buffer member to be less than that of the first tooth body and the second tooth body can prevent damage to the first tooth body and the second tooth body. Even if the force on the first tooth body and the second tooth body is too large, the buffer member will be damaged prior to the first tooth body and the second tooth body, which can then play a role in prompting the user and protecting the first tooth body and the second tooth body. The transmission structure provided by the embodiment of the present application can effectively avoid or reduce the possibility of damage to the transmission structure, thereby improving the service life of the transmission structure and solving the problem that the transmission structure in the prior art is prone to damage during the energy transmission process. Applying the transmission structure provided by the embodiment of the present application to a power device can also effectively avoid or reduce the possibility of damage to the power device, thereby improving the service life of the power device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 FIG. shows a schematic structural diagram of a power device in an embodiment of the present application.

[0020] Figure 2 FIG. shows a schematic structural diagram of another perspective of a power device in an embodiment of the present application.

[0021] Figure 3 is Figure 1 an enlarged view of part A in FIG.

[0022] Figure 4 FIG. shows a schematic structural diagram of a transmission structure in a power device in an embodiment of the present application.

[0023] Figure 5 FIG. shows a schematic structural diagram of another perspective of a transmission structure in an embodiment of the present application.

[0024] Figure 6 FIG. shows a schematic structural diagram of yet another perspective of a transmission structure in an embodiment of the present application.

[0025] Figure 7 is Figure 4 a partial exploded view of

[0026] Figure 8 which shows a schematic structural view of a buffer member in a transmission structure in an embodiment of the present application.

[0027] In the figure: power device 1, transmission structure 10, first transmission member 110, first tooth body 111, first connection hole 112, second transmission member 120, second tooth body 121, second connection hole 122, installation gap 130, buffer member 140, first end 141, second end 142, support block 150, power main body 20, first connection member 30, convex block 310, second connection member 40. Detailed implementation manners

[0028] To make the objectives, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be described in detail below. Apparently, the described embodiments are only a part rather than all of the embodiments of the present application. Based on the embodiments in the present application, all other implementation manners obtained by those of ordinary skill in the art without creative efforts shall fall within the scope protected by the present application.

[0029] Terms such as "first" and "second" in the specification and claims of the present application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that such used data may be interchanged under appropriate circumstances so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. generally belong to the same category, and do not limit the number of objects. For example, the first object may be one or multiple. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally means an "or" relationship between the associated objects before and after.

[0030] The inventive concept of the present application is described herein:

[0031] The power device can convert electrical energy into kinetic energy, which is widely used in production equipment. In the power device, there is a structure for delivering kinetic energy to the processing unit called the transmission structure, and the transmission structure can transfer kinetic energy to different processing units according to the requirements of the processing unit.

[0032] As an energy transfer and conversion intermediate station, the transmission structure is prone to damage during the process of receiving and transmitting energy. Specifically, although the transmission structure is usually made of metal or other strong materials and has sufficient strength and stiffness to withstand the forces and torques generated by the power device, during the production and processing process, the transmission structure needs to receive the forces and torques generated by the power main body in the power device for a long time, so the possibility of damage is still relatively high. However, it is difficult to replace the transmission structure after damage, and the replacement process is complex.

[0033] Based on this, the inventor provides a transmission structure and a power device, which improve the traditional structure setting of the transmission structure. By setting a buffer member to reduce the impact of external forces and torques on the transmission structure, the possibility of damage is reduced. Even if the transmission structure is damaged, there is no need to replace the entire transmission structure, which improves the service life of the transmission structure and the power device. The following combines the attached Figures 1 to 8 to explain in detail the transmission structure and power device provided by this application through specific embodiments and their application scenarios.

[0034] Please also refer to Figure 1 and Figure 2 Embodiment 1 of this application provides a power device 1, which may include a transmission structure 10, a power main body 20, a first connecting member 30, and a second connecting member 40.

[0035] The power main body 20 can be used to provide power. The specific structure of the power main body 20 is not limited in the embodiment of this application. For example, it can be a motor, a servo motor, etc., and can be specifically set according to the actual situation. The power main body 20 can convert electrical energy into kinetic energy and transmit it to the transmission structure 10 through the first connecting member 30. That is to say, in this embodiment, the power main body 20 can be used to provide power and drive the first transmission member 110 to rotate, and then drive the transmission structure 10 to rotate.

[0036] In this embodiment, the first connecting member 30 can be a rod structure. One end of the first connecting member 30 can be connected to the power main body 20. Specifically, the first connecting member 30 can be welded or integrally formed with the power main body 20, which is beneficial to improving the structural stability of the power main body 20 and the first connecting member 30. The other end of the first connecting member 30 can be connected to the transmission structure 10. Preferably, the first connecting member 30 can be detachably connected to the transmission structure 10, which can facilitate the cooperation of different specifications of the transmission structure 10 and the power main body 20 and is beneficial to improving the applicability of the power main body 20.

[0037] Please also refer to Figures 3 to 6, in a specific embodiment, a partial area on the surface of the first connecting member 30 may be provided with a telescopic bump 310. The transmission structure 10 may be provided with a first connecting hole 112. The first connecting member 30 may be selectively embedded in the first connecting hole 112. When the first connecting member 30 is embedded in the first connecting hole 112, the bump 310 may abut against the inner wall of the first connecting hole 112 and closely adhere to the inner wall of the first connecting hole 112 in a form similar to an expansion bolt. This can increase the friction between the first connecting member 30 and the transmission structure 10, and thus is conducive to improving the structural stability between the first connecting member 30 and the transmission structure 10. It can be understood that in this embodiment, the length of the first connecting member 30 should not be too long. For example, it can be set between 10 mm and 30 mm, so as to avoid or reduce the situation that the first connecting member 30 breaks during operation.

[0038] One end of the second connecting member 40 may be connected to the end of the transmission structure 10 away from the first connecting member 30, and the other end may be connected to the processing unit to transmit energy to the processing unit to achieve production operations. Further, the first connecting hole 112 and the second connecting hole 122 may be coaxially arranged, and the second connecting member 40 and the first connecting member 30 may be located on the same straight line. This can improve the energy transmission efficiency, avoid energy waste, and at the same time reduce the possibility of the transmission structure 10 being damaged due to uneven force. It should be noted that the specific structure and form of the second connecting member 40 in the embodiments of the present application are not limited, and can be specifically set according to the connected processing unit.

[0039] Specifically, the end of the transmission structure 10 away from the first connecting member 30 may be provided with a second connecting hole 122. The second connecting member 40 may be disposed in the second connecting hole 122. The specific setting method may refer to the connection method between the first connecting member 30 and the first connecting hole 112, and will not be elaborated here.

[0040] In a more specific embodiment, the first connecting hole 112 and the second connecting hole 122 may be arranged in a through manner, and the aperture of the first connecting hole 112 may be larger than the aperture of the second connecting hole 122. The size of the first connecting member 30 may be larger than the aperture of the second connecting member 40. It can be understood that since the first connecting hole 112 is connected to the power main body 20 through the first connecting member 30, and the power main body 20 needs to output a large amount of energy, setting the size of the first connecting member 30 and the aperture of the first connecting hole 112 larger can better receive and transmit energy, and avoid or reduce the possibility of the first connecting member 30 being damaged.

[0041] Further, in one embodiment, the first connecting member 30 may also be connected to the second connecting member 40. For example, an opening may be provided in the first connecting member 30. After the first connecting member 30 is inserted into the first connecting hole 112 and the second connecting member 40 is inserted into the second connecting hole 122, the second connecting member 40 may also be inserted into the opening of the first connecting frame, which can further improve the structural stability of the entire power device 1.

[0042] Please refer to Figure 7 , the transmission structure 10 may include: a first transmission member 110, a second transmission member 120, and a buffer member 140. The first connecting hole 112 may be provided in the first transmission member 110, the second connecting hole 122 may be provided in the second transmission member 120, and the buffer member 140 may be disposed between the first transmission member 110 and the second transmission member 120 to play a buffering role.

[0043] Specifically, one end of the first transmission member 110 may be connected to the power main body 20 through the first connecting member 30, and the other end of the first transmission member 110 has a first tooth body 111 protruding in the first direction. In this embodiment of the application, the transmission structure 10 is taken as an example of a cylindrical or approximately cylindrical structure. The above-mentioned first direction may refer to the axial direction of the transmission structure 10.

[0044] One end of the second transmission member 120 may be connected to the processing unit through the second connecting member 40, and the other end of the second transmission member 120 has a second tooth body 121 protruding in the second direction, where the second direction is opposite to the first direction. The second tooth body 121 may be engaged with the first tooth body 111. When the first tooth body 111 rotates driven by the power main body 20, the second tooth body 121 may rotate together driven by the first tooth body 111, and then can drive the second connecting member 40 to rotate to transmit energy.

[0045] In this embodiment of the application, the specific structures and forms of the first tooth body 111 and the second tooth body 121 are not limited. For example, in one embodiment, the first tooth body 111 and the second tooth body 121 may be provided as a sheet-like structure or a conical structure, etc., and may be specifically set according to actual situations.

[0046] There may be an installation gap 130 between the first tooth body 111 and the second tooth body 121. The installation gap 130 is distributed around the axial direction of the first transmission member 110 and the second transmission member 120 and extends along the radial direction of the first transmission member 110 and the second transmission member 120. The buffer member 140 may be disposed within the installation gap 130. When the first transmission member 110 rotates, it will directly contact the buffer member 140 rather than directly contacting the second transmission member 120. Therefore, the force of the first transmission member 110 will not be directly transmitted to the second transmission member 120. The buffer member 140 can play a buffering effect between the transmission member and the second transmission member 120, avoiding or reducing the possibility of damage to the first tooth body 111 and / or the second tooth body 121 caused by the direct contact between the first tooth body 111 and the second tooth body 121, which is beneficial to improving the service life of the entire transmission structure 10.

[0047] Specifically, please refer to Figure 8 In this embodiment, the buffer member 140 may have opposite first end 141 and second end 142, and the size of the first end 141 is larger than that of the second end 142. When the buffer member 140 is disposed within the installation gap 130, the second end 142 may be located inside the installation gap 130, and the first end 141 may be located outside the installation gap 130. And the first end 141 is flush with the outer surfaces of the first tooth body 111 and the second tooth body 121. This can not only improve the overall aesthetic degree, but also avoid the possibility that the buffer member 140 protrudes from the surfaces of the first tooth body 111 and the second tooth body 121, resulting in damage to the first buffer member 140 due to the influence of the external environment, thereby being beneficial to improving the overall stability of the transmission structure 10.

[0048] The embodiments of the present application do not limit the specific structure of the buffer member 140. For example, in one embodiment, the buffer member 140 may be configured as a wedge-shaped structure, which can make the buffer member 140 more matched with the installation gap 130, thereby avoiding the hollow state inside the transmission structure 10 and improving the overall stability of the transmission structure 10.

[0049] Furthermore, in one embodiment, the hardness of the buffer member 140 may be less than the hardness of the first tooth body 111 and the second tooth body 121. When the first tooth body 111 contacts the buffer member 140, due to the relatively small hardness of the buffer member 140, if the first tooth body 111 is subjected to excessive force and transmitted to the buffer member 140, the buffer member 140 will deform and be damaged prior to the first tooth body 111. This can play a role in prompting the user and can also play a role in protecting the first tooth body 111. The same is true when the second tooth body 121 contacts the buffer member 140, which will not be elaborated here.

[0050] In addition, please refer to Figure 4 andFigure 7 In this embodiment, the first transmission member 110, the second transmission member 120, and the buffer member 140 can be set to a detachable structure. That is to say, when the transmission structure 10 is working and the buffer member 140 is damaged, only the buffer member 140 can be replaced. This can not only simplify the maintenance process but also simplify the maintenance operation. Similarly, if the first transmission member 110 or the second transmission member 120 is damaged, only the corresponding damaged component can be replaced.

[0051] In addition, in one implementation, the transmission structure 10 can also be provided with a support block 150. The support block 150 can be disposed on the end face of the first transmission member 110 and / or the end face of the second transmission member 120, and is located inside the first tooth body 111 and / or inside the second tooth body 121. In this embodiment, the support block 150 can be used to support the first tooth body 111 and the second tooth body 121, and share a part of the acting force for the first tooth body 111 and the second tooth body 121, so as to avoid damage to the first tooth body 111 and the second tooth body 121 during operation.

[0052] The embodiment of the present application does not limit the specific structure of the support block 150. For example, in one implementation, the end face of the support block 150 can be flush with the end face of the first tooth body 111 and / or the second tooth body 121. That is to say, in this implementation, the length of the support block 150 protruding from the end face of the first transmission member 110 is the same as the length of the first tooth body 111 protruding from the end face of the first transmission member 110. Or, the length of the support block 150 protruding from the end face of the second transmission member 120 is the same as the length of the second tooth body 121 protruding from the end face of the second transmission member 120. This can also avoid the state of internal hollowing after the first transmission member 110, the second transmission member 120, the support block 150, and the buffer member 140 are installed, and improve the overall stability of the transmission structure 10.

[0053] The embodiments of the present application do not limit the specific number of the support blocks 150. At the same time, the embodiments of the present application also do not limit the number of the first tooth bodies 111 and the second tooth bodies 121. For example, in one embodiment, the number of the support blocks 150 may be the same as the total number of the first tooth bodies 111 and the second tooth bodies 121, that is, each first tooth body 111 or second tooth body 121 is supported by one support block 150. In some other embodiments, a form in which multiple support blocks 150 support one first tooth body 111 or second tooth body 121 may also be adopted, that is, the size of the support blocks 150 can be made smaller, and specifically, it can be set according to the actual situation, and no limitation is made here. The embodiments of the present application also do not limit the connection manner between the support blocks 150 and the first tooth bodies 111 and / or the second tooth bodies 121. For example, integral molding can be adopted, or a detachable form can be adopted for connection, and specifically, it can be set according to the actual situation.

[0054] The transmission structure 10 provided by the embodiments of the present application meshes the first tooth body 111 and the second tooth body 121 by arranging a first transmission member 110 having the first tooth body 111 and a second transmission member 120 having the second tooth body 121, and a mounting gap 130 is reserved between the first tooth body 111 and the second tooth body 121, which is circumferentially distributed along the first transmission member 110 and the second transmission member 120 and extends in the radial direction of the first transmission member 110 and the second transmission member 120. Then, a buffer member 140 is arranged in the mounting gap 130. The buffer member 140 can be used to play a buffering role to avoid direct contact between the first tooth body 111 and the second tooth body 121. At the same time, setting the hardness of the buffer member 140 to be less than the hardness of the first tooth body 111 and the second tooth body 121 can prevent the first tooth body 111 and the second tooth body 121 from being damaged. Even if the force on the first tooth body 111 and the second tooth body 121 is too large, the buffer member 140 will be damaged prior to the first tooth body 111 and the second tooth body 121, thereby playing a role in prompting the user and protecting the first tooth body 111 and the second tooth body 121. The transmission structure 10 provided by the embodiments of the present application can effectively avoid or reduce the possibility of damage to the transmission structure 10, thereby improving the service life of the transmission structure 10 and solving the problem that the transmission structure 10 in the prior art is prone to damage during energy transmission. Applying the transmission structure 10 provided by the embodiments of the present application to the power device 1 can also effectively avoid or reduce the possibility of damage to the power device 1, thereby improving the service life of the power device 1.

[0055] It should be noted that in this text, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising that element.

[0056] In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the reverse order according to the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0057] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application can easily think of changes or substitutions, which should all be covered within the protection scope of the present application.

Claims

1. A transmission structure, characterized in that: include: A first transmission member, one end of which is connected to a power source, and the other end of which has a first tooth body protruding in a first direction; a second transmission member, wherein one end of the second transmission member has a second tooth body protruding in a second direction, the second direction is opposite to the first direction, the first tooth body is meshed with the second tooth body, and an installation gap is provided between the first tooth body and the second tooth body, the installation gap is distributed around the circumference of the first transmission member and the second transmission member, and extends along the radial direction of the first transmission member and the second transmission member, and the other end of the second transmission member is used for outputting power; as well as A buffer component is disposed in the installation gap, and a hardness of the buffer component is smaller than a hardness of the first tooth body and the second tooth body.

2. The transmission structure according to claim 1, characterized in that: The buffer member has a first end and a second end opposite to each other, the first end is larger than the second end, and when the buffer member is disposed in the installation gap, the first end is flush with outer surfaces of the first tooth body and the second tooth body.

3. The transmission structure according to claim 1, characterized in that: The transmission structure is further provided with a support block, which is arranged on the end surface of the first transmission member and / or the end surface of the second transmission member and is located on the inner side of the first tooth body and / or the inner side of the second tooth body.

4. The transmission structure according to claim 3, characterized in that: A plurality of the support blocks are provided, and the buffer member is filled between the plurality of the support blocks.

5. The transmission structure according to claim 3, characterized in that: In the first direction, an end surface of the support block is flush with an end surface of the first tooth body and / or the second tooth body.

6. The transmission structure according to any one of claims 1 to 5, characterized in that: The buffer member is detachably disposed between the first tooth body and the second tooth body.

7. A power device, characterized in that: It includes a transmission structure, a power body, a first connecting member and a second connecting member as described in any one of claims 1 to 6, the power body is connected to the first transmission member through the first connecting member, the power body is used to provide power and drive the first transmission member to rotate, and the second connecting member is connected to one end of the second transmission member away from the first transmission member.

8. The power device according to claim 7, characterized in that: The first transmission member is provided with a first connecting hole passing through it along the first direction, the first connecting member is arranged in the first connecting hole, the second transmission member is provided with a second connecting hole passing through it along the second direction, the second connecting member is arranged in the second connecting hole, and the first connecting hole is coaxially arranged with the second connecting hole.

9. The power device according to claim 8, characterized in that: The diameter of the first connecting hole is greater than or equal to the diameter of the second connecting member.

10. The power device according to claim 9, characterized in that: A retractable protrusion is disposed on a partial area of ​​the surface of the first connecting member. When the first connecting member is disposed in the first connecting hole, the protrusion abuts against an inner wall of the first connecting hole.