A transmission for a smart device

Abstract

The utility model discloses a transmission device for intelligent equipment relates to mechanical drive technical field. Transmission device includes the rotation mechanism with rotation gear and rotation sleeve, lifting mechanism, rotation drive part and lifting drive part, and lifting mechanism includes the bearing sleeve and at least one lifting sleeve, and lifting sleeve sets up the sleeve to set up in the outer circumferential side of bearing sleeve and rotation sleeve sleeve sets up in the outer circumferential side of lifting sleeve, and lifting sleeve and bearing sleeve, lifting sleeve and rotation sleeve are connected through gear rack cooperation between, and rotation drive part is connected with rotation gear, and rotation drive part sets up to drive rotation gear rotation to drive rotation sleeve, all lifting sleeve and bearing sleeve rotation, and each lifting sleeve and bearing sleeve correspond to a lifting drive part respectively, and lifting drive part sets up to drive corresponding bearing sleeve and each lifting sleeve lifting. The transmission device of the utility model is small in size, and the operation space angle and the space height range are big.

Description

Technical Field

[0001] This utility model relates to the field of mechanical transmission technology, specifically to a transmission device applied to intelligent devices. Background Technology

[0002] In the field of intelligent equipment, such as industrial automation equipment, robots, and precision machining equipment, complex rotational and lifting motions are often required to meet various process demands. For example, in automated production lines, robotic arms and lifting platforms need precise control of rotation angles and lifting heights to perform tasks such as material handling, assembly, and processing. Therefore, high-precision and high-stability transmission devices are an important research direction in the field of intelligent equipment.

[0003] In existing technologies, chain drives or synchronous belt drives combined with a rotating platform are commonly used for lifting and lowering conveyor devices. However, due to the relatively large size of the drive chain and synchronous belt, and the need for significant operating space, conveyor devices based on drive chains and synchronous belts cannot be applied to the space-constrained field of intelligent equipment conveying. Furthermore, the short lifespan of synchronous belts and drive chains, requiring regular maintenance and replacement, results in high manufacturing and operating costs for transmission devices based on synchronous belts and drive chains. Utility Model Content

[0004] One objective of this invention is to provide a transmission device for smart devices, which solves the technical problem that the relatively large size of transmission components based on synchronous belts or transmission chains in the prior art makes them unusable in limited spaces.

[0005] Another objective of this invention is to improve the service life of the transmission device.

[0006] According to the purpose of this utility model, this utility model provides a transmission device for intelligent devices, comprising:

[0007] A rotating mechanism includes a rotating gear and a rotating sleeve, wherein a first gear that meshes with the rotating gear is provided on the top periphery of the rotating sleeve;

[0008] A lifting mechanism includes a bearing sleeve and at least one lifting sleeve. The lifting sleeve is configured to be sleeved on the outer periphery of the bearing sleeve, and the rotating sleeve is sleeved on the outer periphery of the lifting sleeve. The lifting sleeve and the bearing sleeve, and the lifting sleeve and the rotating sleeve are connected by a gear and rack. When there are multiple lifting sleeves, adjacent lifting sleeves are connected by the gear and rack.

[0009] A rotary drive unit connected to the rotary gear is configured to drive the rotary gear to rotate, thereby rotating the rotary sleeve, all the lifting sleeves and the bearing sleeve;

[0010] At least two lifting drive components are provided, with each lifting sleeve and each bearing sleeve corresponding to one lifting drive component, and the lifting drive component is configured to drive the corresponding bearing sleeve and each lifting sleeve to lift.

[0011] Optionally, the rotating sleeve is provided with a first rack extending in a vertical direction, and each lifting sleeve includes a second gear meshing with the first rack, the second gear being connected to the lifting drive member corresponding to the lifting sleeve.

[0012] Optionally, each of the lifting sleeves is provided with a second rack extending along the vertical direction, and the bearing sleeve has a third gear that meshes with the second rack of the adjacent lifting sleeve, the third gear being connected to a lifting drive member corresponding to the bearing sleeve.

[0013] Optionally, the rotating sleeve has a first limiting hole extending in a vertical direction, and each of the lifting sleeves has a second limiting hole extending in a vertical direction; the transmission device further includes:

[0014] The first guide pin extends horizontally, with one end connected to the bearing sleeve and the other end connected to the second limiting hole of the adjacent lifting sleeve.

[0015] At least one second guide pin extends horizontally, with one end of each second guide pin connected to a corresponding lifting sleeve and the other end engaged with the first limiting hole of the rotating sleeve and / or the second limiting hole of the adjacent lifting sleeve.

[0016] Optionally, the transmission device further includes:

[0017] A fixing mechanism is fixedly connected to the rotary drive component, and a limiting groove is formed in the fixing mechanism for limiting the rotation of the sleeve.

[0018] Optionally, the rotating sleeve further includes a horizontal portion, and the fixing mechanism further includes:

[0019] A first fixing plate is located at the top of the rotating sleeve and connected to the rotating drive member. The first fixing plate includes a positioning protrusion extending downward from the bottom, and the positioning protrusion is configured to be recessed from its bottom periphery toward the center.

[0020] The second fixing plate is located at the bottom of the positioning protrusion and connected to the positioning protrusion. The second fixing plate includes a positioning plate that protrudes horizontally from the peripheral edge of the positioning protrusion. The top surface of the positioning plate forms a limiting groove with the positioning protrusion for limiting the horizontal portion.

[0021] Optionally, the rotary drive component is a servo motor.

[0022] Optionally, the first gear and the rotating sleeve are integrally formed.

[0023] Optionally, the lifting drive component is a servo motor.

[0024] This invention achieves the rotation and lifting of a transmission device by installing a first gear meshing with a rotating gear at the top of a rotating sleeve, and by configuring a lifting sleeve to connect to both a bearing sleeve and a rotating sleeve. When the rotating drive unit rotates the rotating gear, the rotating sleeve, lifting sleeve, and bearing sleeve rotate simultaneously. Furthermore, by utilizing the gear and rack mechanism, the rotating sleeve, lifting sleeve, and bearing sleeve are sequentially nested together, allowing the lifting drive unit to move the lifting sleeve and bearing sleeve up and down along the rack's extension direction, thus realizing the rotation and lifting of the transmission device. In other words, this invention achieves 360° rotation of the intelligent device by directly designing gear features on the outer circumference of the rotating sleeve to mesh with the rotating gear, and achieves automatic lifting of the transmission device through the gear and rack mechanism between multiple sleeves. This further reduces the space occupied and operating space of the transmission device, enabling a wide range of spatial height and angle adjustments within a small size requirement.

[0025] Furthermore, this invention provides a first rack and a second gear on the rotating sleeve and the lifting sleeve respectively, and the second gear is connected to a lifting drive component corresponding to the lifting sleeve. The lifting drive component drives the second gear of the lifting sleeve to move along the extension direction of the first rack on the rotating sleeve, thereby controlling the lifting sleeve to move towards or away from the rotating sleeve to drive the intelligent device to rise or fall. By utilizing the cooperation between the gear and rack, not only can the lifting stability of the lifting sleeve be guaranteed, but also a large spatial height adjustment can be achieved in a limited space. Moreover, the gear and rack meshing connection method has a stable structure and low manufacturing cost. Compared with the existing technology that uses synchronous belts or transmission chains to achieve rotation and lifting, the durability of the gear and rack can further improve the service life of the transmission device.

[0026] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0027] The following sections will describe some specific embodiments of the present invention in a detailed manner by way of example and not limitation, with reference to the accompanying drawings. The same reference numerals in the drawings denote the same or similar parts or components. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings:

[0028] Figure 1 This is a schematic structural diagram of a transmission device in a lowered state according to an embodiment of the present invention;

[0029] Figure 2 This is a schematic structural diagram of a transmission device in a raised state according to an embodiment of the present invention;

[0030] Figure 3 This is a schematic cross-sectional view of a transmission device according to an embodiment of the present invention.

[0031] Figure label:

[0032] 100-Transmission device, 200-Intelligent device, 10-Rotating mechanism, 11-Rotating gear, 12-Rotating sleeve, 121-First gear, 123-First limiting hole, 124-Horizontal part, 20-Lifting mechanism, 21-Bearing sleeve, 211-Third gear, 212-Base plate, 22-Lifting sleeve, 221-Second gear, 222-Second rack, 223-Second limiting hole, 30-Rotating drive component, 40-Lifting drive component, 50-First guide pin, 60-Second guide pin, 70-Fixing mechanism, 71-Limiting groove, 72-First fixing plate, 721-Positioning protrusion, 73-Second fixing plate, 731-Positioning plate. Detailed Implementation

[0033] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0034] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, it should be noted that, for ease of description, only the parts relevant to this application are shown in the accompanying drawings, not the entire structure. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this application.

[0035] The terms “comprising” and “having”, and any variations thereof, used in this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the steps or units listed, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to such process, method, product, or apparatus.

[0036] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0037] Figure 1 This is a schematic structural diagram of the transmission device in a lowered state according to an embodiment of the present invention. Figure 2 This is a schematic structural diagram of a transmission device in a raised state according to an embodiment of the present invention. Figure 3 This is a schematic cross-sectional view of a transmission device according to an embodiment of the present invention.

[0038] like Figure 1 As shown, this utility model provides a transmission device 100 for a smart device 200. The transmission device 100 includes a rotating mechanism 10, a lifting mechanism 20, a rotating drive member 30 connected to a rotating gear 11, and at least two lifting drive members 40. The rotating mechanism 10 includes a rotating gear 11 and a rotating sleeve 12. The top periphery of the rotating sleeve 12 is provided with a first gear 121 that meshes with the rotating gear 11 (see reference). Figure 2 The lifting mechanism 20 includes a bearing sleeve 21 and at least one lifting sleeve 22. The lifting sleeve 22 is configured to be sleeved on the outer periphery of the bearing sleeve 21, and the rotating sleeve 12 is sleeved on the outer periphery of the lifting sleeve 22. The lifting sleeve 22 and the bearing sleeve 21, and the lifting sleeve 22 and the rotating sleeve 12 are connected by a gear and rack mechanism. When there are multiple lifting sleeves 22, adjacent lifting sleeves 22 are connected by a gear and rack mechanism. The rotating drive 30 is configured to drive the rotating gear 11 to rotate, thereby driving the rotating sleeve 12, all lifting sleeves 22, and the bearing sleeve 21 to rotate. Each lifting sleeve 22 and the bearing sleeve 21 corresponds to a lifting drive 40, and the lifting drive 40 is configured to drive the corresponding bearing sleeve 21 and each lifting sleeve 22 to lift. Here, the number of lifting sleeves 22 can be one, two, or more.

[0039] In this embodiment, a first gear 121 meshing with a rotating gear 11 is provided on the top of the rotating sleeve 12, and the lifting sleeve 22 is configured to be connected to the bearing sleeve 21 and the rotating sleeve 12 respectively. When the rotating drive 30 drives the rotating gear 11 to rotate, the rotating sleeve 12, the lifting sleeve 22, and the bearing sleeve 21 are driven to rotate simultaneously. Furthermore, by utilizing the cooperation between the gear and rack, the rotating sleeve 12, the lifting sleeve 22, and the bearing sleeve 21 are configured to be sequentially nested and connected, so that the lifting drive 40 drives the lifting sleeve 22 and the bearing sleeve 21 to rise and fall along the extension direction of the rack, thereby realizing the rotation and lifting of the transmission device 100. That is, this utility model achieves the overall 360° rotation of the intelligent device 200 by directly designing gear features on the outer periphery of the rotating sleeve 12 to cooperate with the rotating gear 11, and achieves the automatic lifting of the transmission device 100 through the cooperation between the gears and racks between the multi-stage sleeves, further reducing the space occupied and operating space of the transmission device 100, and enabling a large range of spatial height and angle adjustments under small size requirements.

[0040] like Figure 1 As shown, in a further embodiment, the rotating sleeve 12 is provided with a first rack extending in a vertical direction, and each lifting sleeve 22 includes a second gear 221 that meshes with the first rack. The second gear 221 is connected to the lifting drive member 40 corresponding to the lifting sleeve 22. In this embodiment, a first rack and a second gear 221 are respectively provided on the rotating sleeve 12 and the lifting sleeve 22, and the second gear 221 is connected to the lifting drive member 40 corresponding to the lifting sleeve 22. The lifting drive member 40 drives the second gear 221 of the lifting sleeve 22 to move along the extension direction of the first rack of the rotating sleeve 12, thereby controlling the lifting sleeve 22 to move towards or away from the rotating sleeve 12 to drive the intelligent device 200 to rise or fall. By utilizing the cooperation between the gear and rack, not only can the lifting stability of the lifting sleeve 22 be guaranteed, but also a large spatial height adjustment can be achieved in a limited space. Moreover, the gear and rack meshing connection method has a stable structure and low manufacturing cost. Compared with the existing technology that uses synchronous belts or transmission chains to achieve rotation and lifting, the durability of the gear and rack can further improve the service life of the transmission device 100.

[0041] like Figure 1As shown, in a further embodiment, each lifting sleeve 22 is provided with a second rack 222 extending in the vertical direction, and the bearing sleeve 21 has a third gear 211 that meshes with the second rack 222 of the adjacent lifting sleeve 22. The third gear 211 is connected to the lifting drive member 40 corresponding to the bearing sleeve 21. In this embodiment, a second rack 222 and a third gear 211 are respectively provided on the lifting sleeve 22 and the bearing sleeve 21. The third gear 211 is connected to the lifting drive member 40 corresponding to the receiving sleeve. The lifting drive member 40 drives the third gear 211 of the receiving sleeve to move along the extension direction of the second rack 222 of the lifting sleeve 22. This controls the bearing sleeve 21 to move towards or away from the lifting sleeve 22, thereby driving the intelligent device 200 to rise or fall further. Through the cooperation between the gear and rack, the operating stability of the bearing sleeve 21 can be guaranteed, and the spatial height can be further automatically adjusted. Since the gear and rack occupy less space and have less operating space, compared with the existing technology that uses synchronous belts or transmission chains for transmission, the transmission device 100 of this utility model can achieve miniaturization and mass production.

[0042] like Figure 1 As shown, in a further embodiment, the rotating sleeve 12 has a first limiting hole 123 extending in a vertical direction, and each lifting sleeve 22 has a second limiting hole 223 extending in a vertical direction. The transmission device 100 also includes a first guide pin 50 and at least one second guide pin 60. The first guide pin 50 is configured to extend in a horizontal direction and one end is connected to the bearing sleeve 21, and the other end is engaged with the second limiting hole 223 of the adjacent lifting sleeve 22. All the second guide pins 60 are configured to extend in a horizontal direction, and one end of each second guide pin 60 is connected to a corresponding lifting sleeve 22, and the other end is engaged with the first limiting hole 123 of the rotating sleeve 12 and / or the second limiting hole 223 of the adjacent lifting sleeve 22. In this embodiment, by providing a first guide pin 50 that engages with the first limiting hole 123 of the rotating sleeve 12 and a second guide pin 60 that engages with the second limiting hole 223 of the lifting sleeve 22 in the transmission device 100, the lifting sleeve 22 and the rotating sleeve 12, the lifting sleeve 22 and the supporting sleeve 21, and the lifting sleeve 22 and the lifting sleeve 22 are connected through the guide pins and the limiting holes, thereby realizing the linkage rotation of the rotating sleeve 12, the lifting sleeve 22 and the supporting sleeve 21, so as to drive the intelligent device 200 mounted on the supporting sleeve 21 to rotate, thereby realizing the large-angle rotation of the intelligent device 200. Here, the supporting sleeve 21 also includes a base plate 212 for mounting the intelligent device 200.

[0043] like Figure 3 As shown, in a further embodiment, the transmission device 100 also includes a fixing mechanism 70 (see reference 100). Figure 1 The fixing mechanism 70 is fixedly connected to the rotary drive member 30, and a limiting groove 71 is formed within the fixing mechanism 70 for limiting the rotation of the sleeve 12. In this embodiment, by installing the rotation of the sleeve 12 into the limiting groove 71 and connecting the fixing mechanism 70 to the rotary drive member 30, the rotary drive member 30 drives the rotary gear 11 to rotate, thereby causing the rotation of the sleeve 12 to rotate along the central axis of the limiting groove 71, thus achieving a 360° rotation of the smart device 200.

[0044] In a further embodiment, the rotating sleeve 12 further includes a horizontal portion 124, and the fixing mechanism 70 further includes a first fixing plate 72 and a second fixing plate 73. The first fixing plate 72 is located at the top of the rotating sleeve 12 and connected to the rotating drive member 30. The first fixing plate 72 includes a positioning protrusion 721 extending downward from the bottom, and the bottom periphery of the positioning protrusion 721 is recessed towards the center of the positioning protrusion 721. The second fixing plate 73 is located at the bottom of the positioning protrusion 721 and connected to the positioning protrusion 721. The second fixing plate 73 includes a positioning plate 731 protruding horizontally from the periphery edge of the positioning protrusion 721. The positioning plate 731 and the positioning protrusion 721 form a limiting groove 71 for limiting the horizontal portion 124. In this embodiment, by limiting the horizontal portion 124 between the first fixing plate 72 and the second fixing plate 73, the stability of the rotating sleeve 12 driven by the rotating gear 11 is improved, preventing the rotating sleeve 12 from falling off during rotation, and further improving the structural stability of the transmission device 100.

[0045] In a further embodiment, the rotary drive 30 is a servo motor, and the lifting drive 40 is a servo motor. Since servo motors can achieve precise position, speed, and torque control, they ensure high precision in rotational and lifting movements, giving the transmission device 100 good repeatability and consistency. Simultaneously, servo motors have fast response speed and acceleration capabilities, enabling them to adapt to high-speed, high-frequency start-stop requirements and improving the operating efficiency of the transmission device 100.

[0046] In a further embodiment, the first gear 121 and the rotating sleeve 12 are integrally formed, which reduces installation steps and saves space, thereby further improving the ease of use of the transmission device 100 and reducing the space occupied by the transmission device 100. In other embodiments, the first gear 121 and the rotating sleeve 12 can also be separately formed.

[0047] In this embodiment, when there is only one lifting sleeve 22, the working principle of the transmission device 100 to achieve rotational movement is as follows: First, the first gear 121 of the rotating sleeve 12 meshes with the rotating gear 11, and the rotating drive component 30 is controlled to drive the rotating gear 11 to rotate, so as to drive the rotating sleeve 12 to rotate around the axis of the fixed mechanism 70. The lifting sleeve 22 rotates with the rotating sleeve 12 through the meshing connection of the first guide pin 50 with the gear rack, and the bearing sleeve 21 rotates with the lifting sleeve 22 through the meshing connection of the second guide pin 60 with the gear rack, thereby realizing the linkage rotation of the rotating sleeve 12, the lifting sleeve 22 and the bearing sleeve 21, which in turn drives the intelligent device 200 installed on the base plate 212 of the bearing sleeve 21 to rotate.

[0048] In this embodiment, when there is only one lifting sleeve 22, the transmission device 100 achieves the following working principle for lifting and lowering: First, the rotating sleeve 12, the lifting sleeve 22, and the carrying sleeve 21 are sequentially connected by a gear and rack. The lifting drive component 40 corresponding to the carrying sleeve 21 first drives the carrying sleeve 21 to move along the extension direction of the second rack 222, thereby driving the carrying sleeve 21 and the smart device 200 located on the bottom plate 212 of the carrying sleeve 21 to move up and down until they reach the first target position. Then, the lifting drive component 40 corresponding to the lifting sleeve 22 drives the lifting sleeve 22 to move along the extension direction of the first rack, thereby driving the bagging sleeve and the smart device 200 to move up and down until they reach the second target position, thus realizing the lifting and lowering transmission of the smart device 200. Here, the first target position is when the top of the carrying sleeve 21 is flush with the bottom of the lifting sleeve 22, and the second target position is the preset lifting and lowering position of the smart device 200.

[0049] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0050] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A transmission device for intelligent devices, characterized in that, include: A rotating mechanism includes a rotating gear and a rotating sleeve, wherein a first gear that meshes with the rotating gear is provided on the top periphery of the rotating sleeve; A lifting mechanism includes a bearing sleeve and at least one lifting sleeve. The lifting sleeve is configured to be sleeved on the outer periphery of the bearing sleeve, and the rotating sleeve is sleeved on the outer periphery of the lifting sleeve. The lifting sleeve and the bearing sleeve, and the lifting sleeve and the rotating sleeve are connected by a gear and rack. When there are multiple lifting sleeves, adjacent lifting sleeves are connected by the gear and rack. A rotary drive unit connected to the rotary gear is configured to drive the rotary gear to rotate, thereby rotating the rotary sleeve, all the lifting sleeves and the bearing sleeve. At least two lifting drive components are provided, with each lifting sleeve and each bearing sleeve corresponding to one lifting drive component, and the lifting drive component is configured to drive the corresponding bearing sleeve and each lifting sleeve to lift.

2. The transmission device according to claim 1, characterized in that, The rotating sleeve is provided with a first rack extending in a vertical direction, and each lifting sleeve includes a second gear meshing with the first rack, the second gear being connected to the lifting drive member corresponding to the lifting sleeve.

3. The transmission device according to claim 2, characterized in that, Each of the lifting sleeves is provided with a second rack extending along the vertical direction, and the bearing sleeve has a third gear that meshes with the second rack of the adjacent lifting sleeve. The third gear is connected to a lifting drive member corresponding to the bearing sleeve.

4. The transmission device according to claim 3, characterized in that, The rotating sleeve has a first limiting hole extending in a vertical direction, and each of the lifting sleeves has a second limiting hole extending in a vertical direction. The transmission device further includes: The first guide pin extends horizontally, with one end connected to the bearing sleeve and the other end connected to the second limiting hole of the adjacent lifting sleeve. At least one second guide pin extends horizontally, with one end of each second guide pin connected to a corresponding lifting sleeve and the other end engaged with the first limiting hole of the rotating sleeve and / or the second limiting hole of the adjacent lifting sleeve.

5. The transmission device according to claim 4, characterized in that, Also includes: A fixing mechanism is fixedly connected to the rotary drive component, and a limiting groove is formed in the fixing mechanism for limiting the rotation of the sleeve.

6. The transmission device according to claim 5, characterized in that, The rotating sleeve further includes a horizontal portion, and the fixing mechanism further includes: A first fixing plate is located at the top of the rotating sleeve and connected to the rotating drive member. The first fixing plate includes a positioning protrusion extending downward from the bottom, and the bottom periphery of the positioning protrusion is recessed toward the center of the positioning protrusion. The second fixing plate is located at the bottom of the positioning protrusion and connected to the positioning protrusion. The second fixing plate includes a positioning plate that protrudes horizontally from the peripheral edge of the positioning protrusion. The positioning plate and the positioning protrusion form the limiting groove for limiting the horizontal portion.

7. The transmission device according to any one of claims 1-6, characterized in that, The rotary drive component is a servo motor.

8. The transmission device according to claim 7, characterized in that, The first gear and the rotating sleeve are integrally formed.

9. The transmission device according to claim 8, characterized in that, The lifting drive component is a servo motor.

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