Area friction nanometer power generation type temperature sensor

Abstract

The utility model relates to the field of sensors, in particular to a region friction nanometer power generation type temperature sensor which comprises an outer sleeve and an inner sleeve, a first friction nanometer material is arranged on the outer side wall of the inner sleeve, a second friction nanometer material is arranged on the inner side wall of the outer sleeve, and the first friction nanometer material and the second friction nanometer material are in clearance fit; the output end of the driving device is connected with the inner sleeve and enables the inner sleeve to rotate relative to the outer sleeve, one end of the piston mechanism is connected with the outer sleeve and enables the outer sleeve to generate axial displacement relative to the inner sleeve, and the other end of the piston mechanism is further communicated with an air bag. According to the utility model, the defect that the existing temperature sensor cannot comprehensively monitor the temperature change of the area well is overcome, the temperature value detection requirement of the average temperature can be met, the average temperature of a larger area can be measured, and the monitoring blind area is avoided.

Description

Technical Field

[0001] This application relates to the field of sensor technology, and in particular to a surface-domain triboelectric nanogenerator temperature sensor. Background Technology

[0002] Existing sensors have significant limitations in temperature monitoring. Their data acquisition range is strictly confined to a very small area within the installation location, only able to obtain single-point temperature values, making it difficult to comprehensively and accurately present the temperature distribution over a large area. Taking industrial furnaces as an example, the internal space is usually large, and the materials are affected by various factors such as airflow, heat source distribution, and material accumulation during heating, making uneven heating highly likely. In such cases, relying solely on single-point data cannot diagnose the risk of localized overheating, resulting in monitoring blind spots.

[0003] In scenarios requiring monitoring of temperature gradients, hotspots, or dynamic changes in the temperature field, the limitations of existing sensors become more pronounced. For example, in lithium battery thermal runaway early warning, temperature changes rapidly and exhibit significant gradient differences during thermal runaway; an abnormal temperature rise in a tiny area could be a precursor to thermal runaway. Similarly, in semiconductor manufacturing processes, temperature early warning requires extremely high precision and uniformity; even minor fluctuations in the temperature field can affect product quality and performance. Such scenarios necessitate the dense deployment of numerous sensors to cover the target area, leading to a significant increase in costs. Furthermore, the operation of a large number of sensors can cause data redundancy and signal interference, increasing the difficulty of data processing and analysis. Utility Model Content

[0004] Based on this, the purpose of this invention is to overcome the shortcomings of existing temperature sensors in that they cannot effectively and comprehensively monitor surface temperature changes, and to provide a surface temperature sensing device. This invention can solve the need for temperature value detection requiring average temperature, and can measure the average temperature of a large area; moreover, the nano-triboelectric generator has good sensitivity, high detection accuracy, is easy to install and operate, and is economical, suitable for most facility surface or space temperature detection needs, avoids monitoring blind spots, and has the advantages of being economical, environmentally friendly, and green.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0006] A surface-area triboelectric nanogenerator temperature sensor includes an outer sleeve and an inner sleeve with one end inserted into the outer sleeve. The outer side wall of the inner sleeve is provided with a first triboelectric nanomaterial, and the inner side wall of the outer sleeve is provided with a second triboelectric nanomaterial. The first triboelectric nanomaterial and the second triboelectric nanomaterial are in a gap fit. The second triboelectric nanomaterial is connected to an external voltage sensor through a wire. The second triboelectric nanomaterial is divided into two discontinuous parts. The first triboelectric nanomaterial is always in simultaneous local contact with the two discontinuous parts of the second triboelectric nanomaterial.

[0007] It also includes a drive device whose output end is connected to the inner sleeve and rotates it relative to the outer sleeve, and a piston mechanism whose one end is connected to the outer sleeve and causes it to move axially relative to the inner sleeve, the other end of the piston mechanism being connected to an air bag.

[0008] In this application, the inner sleeve rotates relative to the outer sleeve under the action of the driving device. The friction between the first and second friction nanomaterials generates a voltage signal, which is collected by an external voltage sensor. When the temperature of the target area changes, it affects the gas volume in the gas bag. The change in the gas bag volume drives the piston mechanism to produce a push-pull effect, causing the outer sleeve connected to the piston mechanism to undergo axial displacement relative to the inner sleeve. This results in a change in the relative position of the first and second friction nanomaterials, altering the friction area between the inner and outer sleeves, and thus changing the voltage signal. By calculating and calibrating the relationship between the voltage signal and temperature, real-time detection is possible. The temperature sensing part of this application uses an air bag as a sensor. The side of the air bag that receives the temperature can adhere to the side that receives the temperature. Changes in the average temperature of the side that receives the temperature will be transmitted to the gas inside the air bag, causing the gas volume to expand and contract due to thermal expansion. Since the air bag is a surface temperature sensing intermediary structure, its measured surface area is larger than the point area, thus it can solve the temperature value detection needs that require average temperature and can measure the average temperature of a large area. Furthermore, the nano-triboelectric generator has good sensitivity, high detection accuracy, is easy to install and operate, and has high economic benefits. It is suitable for most facility surface or space temperature detection needs, avoids monitoring blind spots, and has the advantages of economy, environmental protection, and greenness.

[0009] Furthermore, an aluminum foil attached to the inside of the outer casing is disposed between the second friction nanomaterial and the outer casing, and the aluminum foil connects to the wire. The aluminum foil is used to conduct electricity between the wire and the second friction nanomaterial, enabling the transmission of voltage signals.

[0010] Furthermore, the second friction nanomaterial comprises an upper friction nanoring, an isolation ring, and a lower friction nanoring sequentially distributed along the axial direction of the outer casing; the first friction nanomaterial simultaneously contacts the upper friction nanoring, the isolation ring, and the lower friction nanoring; the number of wires is two, and the two wires are electrically connected to the upper friction nanoring and the lower friction nanoring, respectively. Dividing the second friction nanomaterial into upper and lower layers avoids the need for repeated revisions of its positional relationship due to external factors shifting its relative positions after the initial conditions are determined.

[0011] Furthermore, the isolation ring is made of insulating plastic.

[0012] Furthermore, the piston mechanism includes a piston sleeve, a piston ring disposed inside the piston sleeve, one end of the outer sleeve extending into the piston sleeve and connected to the piston ring, and the piston ring having a clearance fit with the inner wall of the piston sleeve.

[0013] Furthermore, the piston ring and piston sleeve are well lubricated and there is no air leakage.

[0014] Furthermore, the piston ring is fixed to the outer sleeve by screws.

[0015] It should be noted that by extending one end of the outer sleeve into the piston sleeve and connecting it with the piston ring, a compact combination of the various components of the piston mechanism is achieved. The piston ring and the inner wall of the piston sleeve adopt a clearance fit, which provides sufficient space for the movement of the piston ring, reduces movement resistance, ensures the flexibility of piston movement, and improves the sensitivity of temperature detection.

[0016] Furthermore, the air bag includes a planar air bladder and an air tube communicating with the planar air bladder, the air tube communicating with the piston sleeve.

[0017] Furthermore, an adhesive layer is provided on one side of the planar airbag.

[0018] Furthermore, the first and / or second triboelectric nanomaterials are triboelectric copper electrodes, triboelectric aluminum electrodes, triboelectric polyimide material blocks, polymethyl methacrylate material blocks, polytetrafluoroethylene material blocks, or nylon material blocks. The first and second triboelectric nanomaterials meet the requirement that the materials in the triboelectric nanomaterials sequence have opposite triboelectric polarities.

[0019] Furthermore, the outer sleeve includes a hollow annular portion with one end open, and a first shaft connecting the hollow annular portion; the inner sleeve includes a circular tube portion, and a second shaft connecting the circular tube portion; the circular tube portion is inserted into the hollow annular portion, the first shaft is connected to the piston ring, and the second shaft is connected to the drive device.

[0020] The inner sleeve's circular tube portion and the outer sleeve's hollow annular portion are fitted together, achieving precise nesting and ensuring the stability of the structural connection. The outer sleeve is connected to the piston ring via the first shaft, and the inner sleeve is connected to the drive device via the second shaft. The functional boundaries of each component are clear, facilitating their respective undertaking of different transmission or drive tasks and improving the overall system's synergy. The first and second shafts are arranged coaxially with the hollow annular portion and the circular tube portion, ensuring transmission efficiency and response speed.

[0021] Furthermore, the driving device is a motor, and the output end of the motor is connected to the inner sleeve via a key. Using a motor as the driving device provides stable power output and rapid response, offering continuous and efficient power support for the mechanism's operation. The keyed connection between the motor output end and the inner sleeve ensures direct and reliable force transmission, reduces power loss, and guarantees concentricity and accuracy during transmission, thereby improving the overall operational precision of the mechanism.

[0022] Compared with the prior art, the beneficial effects of this utility model are:

[0023] Under the action of the driving device, the inner sleeve rotates relative to the outer sleeve. The friction between the first and second friction nanomaterials generates a voltage signal, which is collected by an external voltage sensor. When the temperature of the target area changes, it affects the volume of gas in the gas bag. The change in the volume of the gas bag drives the piston mechanism to produce a push-pull effect, causing the outer sleeve connected to the piston mechanism to undergo axial displacement relative to the inner sleeve. This results in a change in the relative position of the first and second friction nanomaterials, which in turn changes the friction area between the inner and outer sleeves, thereby changing the voltage signal. By calculating and calibrating the relationship between the voltage signal and the temperature, the temperature change of the target area can be detected in real time.

[0024] This application uses an air bag as the temperature sensing element. The side of the air bag that receives the temperature can adhere to the side that receives the temperature. Changes in the average temperature of the side that receives the temperature are transmitted to the gas inside the air bag, causing the gas volume to expand and contract due to thermal expansion. Since the air bag is a surface temperature sensing intermediary structure, its measured surface area is larger than the point area. Therefore, it can solve the temperature detection needs that require average temperature and can measure the average temperature of a large area. Furthermore, the nano-triboelectric generator has good sensitivity, high detection accuracy, is easy to install and operate, and is economical. It is suitable for most facility surface or space temperature detection needs, avoids monitoring blind spots, and has the advantages of being economical, environmentally friendly, and green.

[0025] Compared with the prior art, the beneficial effects of this utility model are:

[0026] (1) Under the action of the driving device, the inner sleeve rotates relative to the outer sleeve. The first friction nanomaterial and the second friction nanomaterial rub against each other and generate a voltage signal which is collected by the external voltage sensor. When the temperature of the target area changes, it will affect the gas volume in the gas bag. The change in the volume of the gas bag will drive the piston mechanism to produce a push-pull effect, causing the outer sleeve connected to the piston mechanism to move axially relative to the inner sleeve, thereby causing the relative position of the first friction nanomaterial and the second friction nanomaterial to change, which will change the friction area of ​​the inner sleeve and the outer sleeve, thereby changing the voltage signal. By calculating and calibrating the relationship between the voltage signal and the temperature, the temperature change of the target area can be detected in real time.

[0027] (2) The temperature sensing part of this application uses an air bag as a sensor. The side of the air bag that is heated can be attached to the side that is not heated. The change in the average temperature of the side that is not heated will be transmitted to the gas in the air bag, causing the gas volume to expand and contract. Since the air bag is a temperature sensing medium structure of a surface area, its measured surface area is larger than the point area. Therefore, it can solve the temperature value detection needs that require average temperature and can measure the average temperature of a large area. In addition, the nano-triboelectric generator has good sensitivity, high detection accuracy, is easy to install and operate and has high economic benefits. It is suitable for most facility surface or space temperature detection needs, avoids monitoring blind spots, and has the advantages of economy, environmental protection and greenness. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure in one embodiment;

[0029] Figure 2 for Figure 1 Sectional view at point AA;

[0030] Figure 3 for Figure 2 A magnified view of a section at point B in the middle;

[0031] Figure 4 This is a diagram showing the connection relationship between the outer sleeve and the inner sleeve in one embodiment.

[0032] 1-Outer sleeve, 11-Hollow circular ring, 12-First shaft, 2-Inner sleeve, 21-Circular tube, 22-Second shaft, 3-First friction nanomaterial, 4-Second friction nanomaterial, 41-Upper friction nanoring, 42-Isolation ring, 43-Lower friction nanoring, 5-Wire, 6-Drive device, 61-Key, 7-Piston mechanism, 71-Piston sleeve, 72-Piston ring, 73-Screw, 8-Air bag, 81-Planar air bladder, 82-Air tube. Detailed Implementation

[0033] The present invention will be further described below with reference to specific embodiments. The accompanying drawings are for illustrative purposes only, representing schematic diagrams rather than actual physical objects, and should not be construed as limiting the scope of this application. To better illustrate the embodiments of the present invention, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0034] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0035] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this application. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0036] Example 1

[0037] like Figure 1 and Figure 2 As shown, a surface temperature sensing device includes an outer sleeve 1 and an inner sleeve 2 with one end inserted into the outer sleeve 1. The outer side wall of the inner sleeve 2 is provided with a first friction nanomaterial 3, and the inner side wall of the outer sleeve 1 is provided with a second friction nanomaterial 4. The first friction nanomaterial 3 and the second friction nanomaterial 4 are in a gap fit. The second friction nanomaterial 4 is connected to an external voltage sensor through a wire 5. The second friction nanomaterial 4 is divided into two discontinuous parts. The first friction nanomaterial 3 is always in partial contact with the two discontinuous parts of the second friction nanomaterial 4 at the same time.

[0038] It also includes a drive device 6 whose output end is connected to the inner sleeve 2 and rotates relative to the outer sleeve 1, and a piston mechanism 7 whose one end is connected to the outer sleeve 1 and moves axially relative to the inner sleeve 2. The other end of the piston mechanism 7 is also connected to an air bag 8.

[0039] Under the action of the driving device 6, the inner sleeve 2 rotates relative to the outer sleeve 1. The first friction nanomaterial 3 and the second friction nanomaterial 4 rub against each other and generate a voltage signal, which is collected by an external voltage sensor. When the temperature of the target area changes, it will affect the gas volume in the gas bag 8. The change in the volume of the gas bag 8 will drive the piston mechanism 7 to produce a push-pull effect, causing the outer sleeve 1 connected to the piston mechanism 7 to undergo axial displacement relative to the inner sleeve 2. This will cause the relative position of the first friction nanomaterial 3 and the second friction nanomaterial 4 to change, thereby changing the friction area between the inner sleeve 2 and the outer sleeve 1, and thus changing the voltage signal. By calculating and calibrating the relationship between the voltage signal and the temperature, the temperature change of the target area can be detected in real time.

[0040] In this embodiment, an aluminum foil attached to the inside of the outer tube 1 is also provided between the second friction nanomaterial 4 and the outer tube 1. The aluminum foil is connected to the wire 5. The aluminum foil is used to conduct electricity between the wire 5 and the second friction nanomaterial 4, so as to realize the transmission of voltage signals.

[0041] like Figure 3 As shown, the second friction nanomaterial 4 includes an upper friction nanoring 41, an isolation ring 42, and a lower friction nanoring 43 sequentially distributed along the axial direction of the outer sleeve 1; the first friction nanomaterial 3 simultaneously contacts the upper friction nanoring 41, the isolation ring 42, and the lower friction nanoring 43; there are two wires 5, which are electrically connected to the upper friction nanoring 41 and the lower friction nanoring 43, respectively. Dividing the second friction nanomaterial 4 into upper and lower layers avoids the need for repeated revisions of its positional relationship due to external factors after the initial conditions are determined.

[0042] In this embodiment, the isolation ring 42 is made of insulating plastic.

[0043] like Figure 2 As shown, the piston mechanism 7 includes a piston sleeve 71, a piston ring 72 disposed inside the piston sleeve 71, and one end of the outer sleeve 1 extends into the piston sleeve 71 and is connected to the piston ring 72. The piston ring 72 is clearance-fitted with the inner wall of the piston sleeve 71.

[0044] In this embodiment, the piston ring 72 and the piston sleeve 71 are well lubricated and there is no air leakage.

[0045] like Figure 2 As shown, the piston ring 72 is fixed to the outer sleeve 1 by screws 73.

[0046] It should be noted that by extending a section of the outer sleeve 1 into the piston sleeve 71 and connecting it with the piston ring 72, the various components of the piston mechanism 7 are compactly integrated. The piston ring 72 and the inner wall of the piston sleeve 71 are fitted with a clearance, which provides sufficient space for the movement of the piston ring 72, reduces movement resistance, ensures the flexibility of piston movement, and improves the sensitivity of temperature detection.

[0047] In this embodiment, the first friction nanomaterial 3 is a polytetrafluoroethylene material block, and the second friction nanomaterial 4 is a nylon material block. The first friction nanomaterial 3 and the second friction nanomaterial 4 meet the requirement that the materials in the triboelectric nanomaterial sequence have opposite polarities in their friction bands.

[0048] like Figure 2 As shown, the drive device 6 is a motor, and the output end of the motor is connected to the inner sleeve 2 via key 61. Using a motor as the drive device 6 provides stable power output and rapid response, offering continuous and efficient power support for the mechanism's operation. The connection between the motor output end and the inner sleeve 2 via key 61 ensures direct and reliable force transmission between the two, reduces power loss, and guarantees concentricity and accuracy during transmission, thereby improving the overall operational precision of the mechanism.

[0049] The advantages of this application are as follows: the temperature sensing part uses an air bag 8 as the sensor. The side of the air bag 8 that receives the temperature can be adhered to the side that is not in contact with the temperature. Changes in the average temperature of the side that is not in contact with the temperature will be transmitted to the gas inside the air bag 8, causing the gas volume to expand and contract due to thermal expansion. Since the air bag 8 is a surface temperature sensing intermediary structure, its measured surface area is larger than the point area. Therefore, it can solve the temperature value detection requirements that require average temperature and can measure the average temperature of a large area. In addition, the nano-triboelectric generator has good sensitivity, high detection accuracy, is easy to install and operate, and has high economic benefits. It is suitable for most facility surface or space temperature detection needs, avoids monitoring blind spots, and has the advantages of economy, environmental protection, and greenness.

[0050] Example 2

[0051] This embodiment is similar to Embodiment 1, except that in this embodiment...

[0052] like Figure 2 As shown, the air bag 8 includes a planar air bladder 81 and an air tube 82 connected to the planar air bladder 81, and the air tube 82 is connected to the piston sleeve 71.

[0053] In this embodiment, an adhesive layer is provided on one side of the planar airbag 81. The planar airbag 81 can be adhered to the target area through the adhesive layer. Changes in the average temperature of the side will be transmitted to the gas inside the airbag 8, causing the gas volume to expand and contract due to thermal expansion and contraction. Since the airbag 8 is a temperature sensing intermediary structure covering a planar area, its measured surface area is larger than the point area. Therefore, it can solve the temperature value detection requirement of average temperature and can measure the average temperature of a larger area.

[0054] The other structures and principles of this embodiment are the same as those of Embodiment 1.

[0055] Example 3

[0056] This embodiment is similar to Embodiment 1, except that in this embodiment:

[0057] like Figure 4 As shown, the outer sleeve 1 includes a hollow annular portion 11 with one end open, and a first shaft 12 connecting the hollow annular portion 11; the inner sleeve 2 includes a circular tube portion 21, and a second shaft 22 connecting the circular tube portion 21; the circular tube portion 21 is inserted into the hollow annular portion 11, the first shaft 12 is connected to the piston ring 72, and the second shaft 22 is connected to the drive device 6.

[0058] The inner sleeve 2's circular tube portion 21 and the outer sleeve 1's hollow annular portion 11 are inserted together, achieving precise nesting and ensuring the stability of the structural connection. The outer sleeve 1 is connected to the piston ring 72 via the first shaft 12, and the inner sleeve 2 is connected to the drive device 6 via the second shaft 22. The functional boundaries of each component are clear, making it easy for them to undertake different transmission or drive tasks, thus improving the overall system's synergy. The first shaft 12 and the second shaft 22 are arranged coaxially with the hollow annular portion 11 and the circular tube portion 21, ensuring transmission efficiency and response speed.

[0059] The other structures and principles of this embodiment are the same as those of Embodiment 1.

[0060] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A surface-area triboelectric nanogenerator temperature sensor, characterized in that, It includes an outer sleeve (1) and an inner sleeve (2) with one end inserted in the outer sleeve (1). The outer side wall of the inner sleeve (2) is provided with a first friction nanomaterial (3), and the inner side wall of the outer sleeve (1) is provided with a second friction nanomaterial (4). The first friction nanomaterial (3) and the second friction nanomaterial (4) are in a gap fit. The second friction nanomaterial (4) is connected to an external voltage sensor through a wire (5). The second friction nanomaterial (4) is divided into two discontinuous parts. The first friction nanomaterial (3) always simultaneously and partially contacts the two discontinuous parts of the second friction nanomaterial (4). It also includes a drive device (6) whose output end is connected to the inner sleeve (2) and rotates relative to the outer sleeve (1), and a piston mechanism (7) whose one end is connected to the outer sleeve (1) and causes axial displacement relative to the inner sleeve (2), and the other end of the piston mechanism (7) is also connected to an air bag (8).

2. The surface-domain triboelectric nanogenerator temperature sensor according to claim 1, characterized in that, An aluminum foil attached to the inside of the outer tube (1) is also provided between the second friction nanomaterial (4) and the outer tube (1), and the aluminum foil is connected to the wire (5).

3. The surface-area triboelectric nanogenerator temperature sensor according to claim 1, characterized in that, The second friction nanomaterial (4) includes an upper friction nanoring (41), an isolation ring (42) and a lower friction nanoring (43) distributed sequentially along the axial direction of the outer tube (1); the first friction nanomaterial (3) simultaneously contacts the upper friction nanoring (41), the isolation ring (42) and the lower friction nanoring (43).

4. The surface-area triboelectric nanogenerator temperature sensor according to claim 3, characterized in that, The number of the wires (5) is two, and the two wires (5) are electrically connected to the upper friction nanoring (41) and the lower friction nanoring (43) respectively.

5. The surface-domain triboelectric nanogenerator temperature sensor according to claim 1, characterized in that, The piston mechanism (7) includes a piston sleeve (71), a piston ring (72) disposed inside the piston sleeve (71), a section of the outer sleeve (1) extending into the piston sleeve (71) and connected to the piston ring (72), and the piston ring (72) being clearance-fitted with the inner wall of the piston sleeve (71).

6. The surface-domain triboelectric nanogenerator temperature sensor according to claim 5, characterized in that, The piston ring (72) is fixed to the outer sleeve (1) by screws (73).

7. A surface-area triboelectric nanogenerator temperature sensor according to claim 5, characterized in that, The air bag (8) includes a planar air bladder (81) and an air tube (82) connecting the planar air bladder (81), the air tube (82) connecting the piston sleeve (71).

8. A surface-area triboelectric nanogenerator temperature sensor according to claim 7, characterized in that, One side of the planar airbag (81) is provided with an adhesive layer.

9. A surface-area triboelectric nanogenerator temperature sensor according to claim 5, characterized in that, The outer sleeve (1) includes a hollow annular portion (11) with one end open, and a first shaft (12) connected to the hollow annular portion (11); the inner sleeve (2) includes a circular tube portion (21), and a second shaft (22) connected to the circular tube portion (21); the circular tube portion (21) is inserted into the hollow annular portion (11), the first shaft (12) is connected to the piston ring (72), and the second shaft (22) is connected to the drive device (6).

10. A surface-domain triboelectric nanogenerator temperature sensor according to claim 1, characterized in that, The driving device (6) is a motor, and the output end of the motor is connected to the inner sleeve (2) via a key (61).

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