Damping continuously adjustable rotary handle

Abstract

This invention provides a continuously adjustable damping rotary crank, including a rotary damping module. The rotary damping module includes a fixing member for detachable connection to an external device, a rotating member for transmission connection to the external device, and an adjustment component disposed on the rotating member. The rotating member is rotatable relative to the fixing member. The adjustment component includes a friction plate assembly, an elastic member, and an adjustment member. The friction plate assembly is configured to frictionally engage with the fixing member under axial pressure to generate rotary damping. The elastic member is configured to apply axial pressure to the friction plate assembly. The adjustment member is configured to adjust the compression of the elastic member along the axial direction of the rotating member to linearly change the axial pressure borne by the friction plate assembly, thereby continuously adjusting the rotary damping torque of the rotating member. This effectively solves the problem that in traditional hand cranks, if the handle accidentally detaches during hand cranking, the external device accelerates to fall or rotates in the opposite direction due to loss of control of the hand crank.

Description

Technical Field

[0001] This invention relates to the field of manual rotary table mechanisms. More specifically, it relates to a continuously adjustable damping rotary handle. Background Technology

[0002] A turntable is a mechanical device that enables precise control of the pitch angle of an equipment, and it is widely used in radar, satellite communication, optical instruments, medical equipment, and industrial inspection. Currently, electric servo systems have become the mainstream method for driving turntable rotation due to their high efficiency and precision. However, in situations such as power outages, electromagnetic interference, or extreme environments (e.g., battlefields, polar regions), manual rotation mechanisms remain an indispensable and critical emergency backup solution. To ensure that the turntable does not lose control during pitch movement, the manual mechanism must rely on anti-rotation design. Existing technologies mainly achieve this through three methods: self-locking structures (such as worm gear anti-reverse mechanisms), clutch switching, and damping devices. However, these traditional designs have significant limitations: self-locking structures are difficult to integrate with electric drive systems, clutch switching requires complex mechanical coordination and significantly reduces system efficiency, and fixed damping designs cannot flexibly adapt to dynamic operating conditions. Summary of the Invention

[0003] The purpose of this invention is to provide a continuously adjustable damping rotary crank to solve at least one of the above-mentioned technical problems.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: This invention provides a continuously adjustable damping rotary crank, comprising: A rotary damping module; the rotary damping module includes a fixing component for detachable connection with an external device, a rotating component for transmission connection with the external device, and an adjustment assembly disposed on the rotating component; the rotating component is rotatable relative to the fixing component; The adjustment assembly includes a friction plate assembly, an elastic element, and an adjustment element; the friction plate assembly is configured to frictionally engage with a fixed element under axial pressure to generate rotational damping; the elastic element is configured to apply axial pressure to the friction plate assembly; the adjustment element is configured to adjust the compression of the elastic element along the axial direction of the rotating element to linearly change the axial pressure borne by the friction plate assembly, thereby continuously adjusting the rotational damping torque of the rotating element.

[0005] In a preferred embodiment, the rotary damping module further includes a pressure sensor and a digital display terminal; the pressure sensor is disposed between the adjusting member and the elastic member, and is used to collect the axial pressure generated by the elastic member in real time; the digital display terminal is used to receive the axial pressure data collected by the pressure sensor, and output the corresponding dynamic torque value for visual display based on the data.

[0006] In a preferred embodiment, the pressure sensor includes a sensor body and a sensor base sleeved on a rotating component, the sensor body being fixed to the sensor base; the digital display terminal is mounted on the circumferential sidewall of the sensor base; the sensor base is located between and connected to the elastic component and the sensor body, and the adjusting component abuts against the sensor body; the digital display terminal is electrically connected to the sensor body via a signal cable; when the rotating component rotates, it can drive the sensor base to drive the digital display terminal to rotate synchronously with the sensor body.

[0007] In a preferred embodiment, the rotating component and the fixed component are coaxially arranged, the rotating component passes through the fixed component and can rotate around its own axis within the fixed component; the rotating handle also includes a bearing, a bearing washer, and a locking nut disposed between the rotating component and the fixed component; the rotating component passes through the bearing, the bearing washer, and the locking nut; the locking nut is screwed to the rotating component to press the inner ring of the bearing and the bearing washer onto the shoulder positioning surface of the rotating component, the inner ring of the bearing is fixed to the rotating component, and the outer ring of the bearing cooperates with the inner wall of the fixed component to achieve rotational support for the rotating component.

[0008] A preferred embodiment is that the outer ring of the bearing and the inner wall of the fixed member are in clearance fit, so that the bearing can move relative to the fixed member along the axial direction of the rotating member.

[0009] A preferred embodiment is that the friction plate assembly includes a first friction plate and a second friction plate sleeved and circumferentially confined on the rotating component; along the axial direction of the rotating component, one side surface of the first friction plate is connected to the elastic component, and the other side surface is in contact with the end face of the fixed component; along the axial direction of the rotating component, both sides of the second friction plate are in contact with the fixed component and the rotating component, respectively.

[0010] In a preferred embodiment, the elastic element is a butterfly spring, one end of which is connected to the pressure sensor along the axial direction of the rotating element, and the other end is connected to the first friction plate; the adjusting element includes a self-locking nut screwed onto the rotating element and a nut washer sleeved on the rotating element, the nut washer abutting between the self-locking nut and the pressure sensor.

[0011] In a preferred embodiment, the rotary crank also includes a rotary handle for inputting manual driving torque to the rotating component, the rotary handle being detachably connected to the end of the rotating component away from external equipment.

[0012] A preferred embodiment is that the rotating handle includes a handle, a shaft, a crank joint, and a rocker arm arranged along the axial direction of the rotating component; the handle includes a hollow cavity, one end of the shaft passes through the hollow cavity and the other end is connected to the rocker arm, and a gap is left between the handle and the shaft to allow the handle to rotate relative to the shaft; the crank joint is connected to the end of the rocker arm away from the shaft.

[0013] A preferred embodiment is that the crank handle connector is provided with a square groove, and the end of the rotating component is provided with a square boss; the square groove and the square boss are fitted together with a clearance to form a circumferential limiting structure.

[0014] The beneficial effects of this invention are as follows: This invention provides a continuously adjustable damping rotary crank, including a rotary damping module. The rotary damping module includes a fixed member for detachable connection to an external device, a rotating member for transmission connection to the external device, and an adjustment component disposed on the rotating member. The rotating member is rotatable relative to the fixed member. The adjustment component includes a friction plate assembly, an elastic element, and an adjustment element. The friction plate assembly is configured to frictionally engage with the fixed member under axial pressure to generate rotary damping. The elastic element is configured to apply axial pressure to the friction plate assembly. The adjustment element is configured to adjust the compression of the elastic element along the axial direction of the rotating member, thereby linearly changing the axial pressure borne by the friction plate assembly and continuously adjusting the rotary damping torque of the rotating member. This invention separates the damping adjustment function from the external device body and integrates it into the rotary crank, enabling seamless switching between manual and electric modes without complex clutch mechanisms or additional operations. This modular design significantly reduces the mechanical complexity of the device body and improves the maintainability and compatibility of the system. Furthermore, by adjusting the compression of the elastic element along the axial direction of the rotating part, the axial pressure borne by the friction plate assembly can be linearly adjusted, thereby achieving stepless and continuous adjustment of the rotational damping torque. The operator can flexibly set the damping value according to the real-time off-center load of the equipment, overcoming the shortcomings of traditional fixed damping designs that cannot adapt to dynamic working conditions. This effectively prevents external equipment from accelerating to fall or rotating in the opposite direction if the handle is accidentally released during manual operation, ensuring the safety and reliability of operation in manual mode. Attached Figure Description

[0015] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0016] Figure 1 This is a schematic diagram of the overall structure of the rotary crank of the present invention.

[0017] Figure 2 This is a cross-sectional schematic diagram of the rotary crank of the present invention.

[0018] Figure 3 This is a schematic diagram of the rotational damping module of the present invention.

[0019] Figure 4 This is a schematic diagram of the rotating handle of the present invention.

[0020] Reference numerals: 1. Rotating handle; 2. Rotation damping module; 3. Signal cable; 4. Digital display terminal; 11. Crank joint; 12. Rocker arm; 13. Handle; 14. Handle shaft; 15. Square groove; 201. Rotating component; 2011. Square boss; 2012. Shaft groove; 2013. First annular boss; 2014. Second annular boss; 202. Self-locking nut; 203. Sensor body; 204. Butterfly spring; 205. First friction plate; 206. Bearing washer; 207. Second friction plate; 208. Anti-loosening screw; 209. Bearing; 210. Locking nut; 211. Sensor seat; 212. Nut washer; 213. Fixing component. Detailed Implementation

[0021] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention.

[0022] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0023] Technologies and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such technologies and equipment should be considered part of the specification.

[0024] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0025] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0026] This invention provides a continuously adjustable damping rotary crank, which realizes a closed-loop emergency manual mode for the turntable, significantly improving the reliability of the entire system. Its structure is simple and reliable. Combined with... Figures 1 to 4As shown, a continuously adjustable damping rotary handle specifically includes a rotary damping module 2. The rotary damping module 2 includes a fixing member 213 for detachable connection to an external device, a rotating member 201 for transmission connection to the external device, and an adjustment assembly disposed on the rotating member 201. The external device may specifically be a turntable. The rotating member 201 is rotatable relative to the fixing member 213. The adjustment assembly includes a friction plate assembly, an elastic element, and an adjustment element. The friction plate assembly is configured to frictionally engage with the fixing member 213 under axial pressure to generate rotary damping. The elastic element is configured to apply axial pressure to the friction plate assembly. The adjustment element is configured to adjust the compression of the elastic element along the axial direction of the rotating member 201 to linearly change the axial pressure borne by the friction plate assembly, thereby continuously adjusting the rotary damping torque when the rotating member 201 rotates. The rotating component 201 drives the friction plate assembly to rotate relative to the fixed component 213 through the engagement of the axial plane tangent. By adjusting the compression of the elastic component through a screw-in adjustment component, the normal pressure on the friction plate assembly can be linearly adjusted, thereby achieving continuous control of the rotational damping torque. The continuously adjustable damping rotary handle provided by this invention achieves two major breakthroughs by separating the damping adjustment function from the main body of the device and integrating it with a traditional rotary handle: First, it adopts an independent damping module, adjusting the damping value through a self-locking nut according to the turntable's off-center load, ensuring safety and reliability in manual mode; second, the modular structure simplifies mechanical complexity, enabling seamless switching between manual and electric modes while reducing maintenance difficulty. This design not only solves the problem of poor compatibility between traditional anti-rotation solutions and automated systems but also improves the adaptability of modern turntables through a "functional decoupling" approach, making it particularly suitable for high-precision industrial inspection and extreme environment equipment scenarios.

[0027] Furthermore, the fixing component 213 is fixedly connected to the equipment base via anti-loosening screws 208, and the rotating component 201 is connected to the hand-cranked mechanism of the external equipment via a standard interface, namely the shaft groove 2012, for transmission. The external equipment needs to have pre-drilled screw holes for connection to the fixing component 213 and mating bosses for engagement with the shaft groove 2012 of the rotating component 201. The relative positional relationship between the screw holes and the mating bosses must be maintained to ensure that both can simultaneously meet the installation requirements. Additionally, the height difference between the end face of the screw hole and the mating boss should meet design requirements to avoid the mating boss being inserted too little into the rotating component 201 after the anti-loosening screws 208 are tightened, thus failing to withstand the driving torque, or being inserted too much, interfering with the end face of the shaft groove of the rotating component 201.

[0028] In one specific embodiment, the rotary damping module 2 further includes a pressure sensor and a digital display terminal 4. The pressure sensor is disposed between the adjusting member and the elastic member, and is used to collect the axial pressure generated by the elastic member in real time. The digital display terminal 4 is used to receive the axial pressure data collected by the pressure sensor and output the corresponding dynamic torque value for visual display based on the data. Integrating a pressure sensor and a digital display terminal in the rotary damping module 2, and collecting axial pressure data in real time and outputting the corresponding dynamic torque value for visual display, allows the operator to intuitively and accurately understand the current damping state, significantly improving the accuracy of manual emergency operations.

[0029] More specifically, the pressure sensor includes a sensor body 203 and a sensor base 211 sleeved on the rotating component 201, with the sensor body 203 fixed to the sensor base 211. The digital display terminal 4 is mounted on the circumferential side wall of the sensor base 211 by screws. The sensor base 211 is located between the elastic element and the sensor body 203 and is connected to the elastic element. The adjusting component abuts against the sensor body 203. The digital display terminal 4 is electrically connected to the sensor body 203 via a signal cable 3. When the rotating component 201 rotates, it drives the sensor base 211 to rotate synchronously with the digital display terminal 4 and the sensor body 203, preventing the signal cable 3 from tangling. The digital display terminal 4 is connected to the pressure sensor via the signal cable 4 to transmit axial pressure data, which is then converted into a dynamic torque value display using a preset algorithm. The dynamic torque value is related to the axial pressure and the friction coefficient of the friction plate, and the preset algorithm requires the input of relevant parameter values. The coefficient of friction is affected by material properties, surface condition (such as roughness and treatment), environmental conditions (temperature, humidity, etc.), load and speed, and lubrication conditions. It is a dynamic and comprehensive parameter. The actual parameter value can be determined by external test and then entered into the digital display terminal 4.

[0030] In one specific embodiment, the rotating component 201 and the fixed component 213 are coaxially arranged. The rotating component 201 passes through the fixed component 213 and can rotate around its own axis within the fixed component 213. The rotating handle also includes a bearing 209, a bearing washer 206, and a locking nut 210 disposed between the rotating component 201 and the fixed component 213. The outer diameter of the locking nut 210 is smaller than the outer diameter of the bearing 209. The rotating component 201 passes through the bearing 209, the bearing washer 206, and the locking nut 210. The locking nut 210 is screwed to the rotating component 201 to press the inner ring of the bearing 209 and the bearing washer 206 against the shoulder positioning surface of the first annular boss 2013 of the rotating component 201. The inner ring of the bearing 209 is fixed to the rotating component 201, and the outer ring of the bearing 209 cooperates with the inner wall of the fixed component 213 to achieve rotational support for the rotating component 201. Furthermore, the outer ring of the bearing 209 and the inner wall of the fixing member 213 are in clearance fit, so that the bearing 209 can move relative to the fixing member 213 along the axial direction of the rotating member 201. Furthermore, the friction plate assembly includes a first friction plate 205 and a second friction plate 207 sleeved and circumferentially limited on the rotating member 201. Along the axial direction of the rotating member 201, one side surface of the first friction plate 205 is connected to the elastic member, and the other side surface is in contact with the left end face of the fixing member 213. Along the axial direction of the rotating member 201, both sides of the second friction plate 207 are in contact with the right end face of the fixing member 213 and the second annular boss 2014 of the rotating member 201, respectively. Through the above arrangement, the axial pressure generated by the compression of the elastic member can be transmitted to the first friction plate 205 and the second friction plate 207. Regarding the engagement between the rotating component 201 and the friction plate assembly, the rotating component 201 drives the friction plate assembly to rotate together through its non-circular cross-section (axial plane), causing relative rotation between the friction plates and the fixed component 213, thereby generating sliding friction damping without affecting the transmission of axial pressure. The axial plane refers to milling one or more planes on the circumference of a cylindrical shaft at a certain location (e.g., single-sided flat cutting to form a "D" shaped cross-section, or double-sided symmetrical flat cutting to form a flattened circular cross-section), thereby achieving torque transmission between the rotating component 201 and the friction plates.

[0031] More specifically, the elastic element is a butterfly spring 204. One end of the butterfly spring 204 along the axial direction of the rotating member 201 is connected to the pressure sensor, and the other end is connected to the first friction plate 205. The butterfly spring 204 can be designed according to pressure requirements and adjustment accuracy, while ensuring matching with the pressure sensor. The adjusting component includes a self-locking nut 202 screwed onto the rotating member 201 and a nut washer 212 sleeved on the rotating member 201. The nut washer 212 abuts between the self-locking nut 202 and the pressure sensor body 203. The self-locking nut 202 is threaded onto the outer peripheral surface of the rotating member 201. By tightening the self-locking nut 202, the nut washer 212, the pressure sensor, the butterfly spring 204, and the first friction plate 205 are sequentially pressed together, and the first friction plate 205 is brought into contact with the end face of the fixing member 213. When the self-locking nut 202 is tightened further, the axial pressure generated by the further compression of the disc spring 204 is transmitted to the first friction plate 205 and the second friction plate 207, so that axial pressure is generated simultaneously between the first friction plate 205 and the left end face of the fixing member 213, and between the second friction plate 207 and the right end face of the fixing member 213. When the rotating member 201 rotates under the drive of external force, the first friction plate 205 and the second friction plate 207 rotate synchronously with the rotating member 201 and slide against the two end faces of the fixing member 213 respectively, thereby generating a rotational damping torque proportional to the axial pressure. Loosening the self-locking nut 202 reduces the axial pressure and the damping torque accordingly, thereby realizing continuous linear adjustment of the damping torque.

[0032] In one specific embodiment, the rotary handle further includes a rotary grip 1 for inputting manual driving torque to the rotating component 201. The rotary grip 1 is detachably connected to the end of the rotating component 201 away from external equipment. More specifically, the rotary handle 1 includes a handle 13, a shaft 14, and a crank joint 11 arranged along the axial direction of the rotating component 201, and a rocker arm 12 arranged perpendicular to the axial direction of the rotating component 201. The handle 13 includes a hollow cavity. One end of the shaft 14 passes through the hollow cavity and the other end is connected to the rocker arm 12. A gap is left between the handle 13 and the shaft 14 to allow the handle 13 to rotate relative to the shaft 14. The crank joint 11 is connected to the end of the rocker arm 12 away from the shaft 14. After the shaft 14 passes through the hollow cavity of the handle 13, it is rigidly connected to the rocker arm 12 by screws. There is a fitting gap between the handle 13 and the shaft 14, allowing the handle 13 to rotate freely around its own axis. The rocker arm 12 is connected to the crank joint 11 by screws. The end of the crank joint 11 has a square protrusion, which together with the limiting groove on the rocker arm 12 forms a circumferential limiting structure.

[0033] Furthermore, in the above embodiment, the crank handle connector 11 is provided with a square groove 15, and the end of the rotating component 201 is provided with a square boss 2011; that is, one end of the rotating component 201 forms a square boss 2011, and the other end forms a axial groove 2012. The square groove 15 and the square boss 2011 are clearance-fitted to form a circumferential limiting structure, and designing the two to be clearance-fitted facilitates operation. The axial groove 2012 of the rotating component 201 and the square groove 15 of the crank handle connector 11 are the same size, so that the rotating handle 1 can be individually connected to external equipment. Both the square groove 15 and the axial groove 2012 can be adjusted according to the shape of the mating boss of the external equipment, specifically, they can be triangular, pentagonal, or hexagonal, etc.

[0034] In summary, this invention provides a continuously adjustable damping rotary crank, including a rotary damping module. The rotary damping module includes a fixed member for detachable connection to an external device, a rotating member for transmission connection to the external device, and an adjustment component disposed on the rotating member. The rotating member is rotatable relative to the fixed member. The adjustment component includes a friction plate assembly, an elastic element, and an adjustment element. The friction plate assembly is configured to frictionally engage with the fixed member under axial pressure to generate rotary damping. The elastic element is configured to apply axial pressure to the friction plate assembly. The adjustment element is configured to adjust the compression of the elastic element along the axial direction of the rotating member, thereby linearly changing the axial pressure borne by the friction plate assembly and continuously adjusting the rotary damping torque of the rotating member. This invention separates the damping adjustment function from the external device body and integrates it into the rotary crank, enabling seamless switching between manual and electric modes without complex clutch mechanisms or additional operations. This modular design significantly reduces the mechanical complexity of the device body and improves the maintainability and compatibility of the system. Furthermore, by adjusting the compression of the elastic element along the axial direction of the rotating part, the axial pressure borne by the friction plate assembly can be linearly adjusted, thereby achieving stepless and continuous adjustment of the rotational damping torque. The operator can flexibly set the damping value according to the real-time off-center load of the equipment, overcoming the shortcomings of traditional fixed damping designs that cannot adapt to dynamic working conditions. This effectively prevents external equipment from accelerating to fall or rotating in the opposite direction if the handle is accidentally released during manual operation, ensuring the safety and reliability of operation in manual mode.

[0035] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. For those skilled in the art, other variations or modifications can be made based on the above description. It is impossible to exhaustively list all the implementation methods here. All obvious variations or modifications derived from the technical solutions of the present invention are still within the protection scope of the present invention.

Claims

1. A continuously adjustable damping rotary crank, characterized by, include: Rotary damping module; The rotary damping module includes a fixed component for detachable connection with an external device, a rotating component for transmission connection with the external device, and an adjustment assembly disposed on the rotating component; the rotating component is rotatable relative to the fixed component. The adjustment assembly includes a friction plate assembly, an elastic element, and an adjustment element; the friction plate assembly is configured to frictionally engage with a fixed element under axial pressure to generate rotational damping; the elastic element is configured to apply axial pressure to the friction plate assembly; the adjustment element is configured to adjust the compression of the elastic element along the axial direction of the rotating element to linearly change the axial pressure borne by the friction plate assembly, thereby continuously adjusting the rotational damping torque of the rotating element.

2. The rotary handle of claim 1, wherein The rotational damping module also includes a pressure sensor and a digital display terminal; the pressure sensor is disposed between the adjusting member and the elastic member, and is used to collect the axial pressure generated by the elastic member in real time; the digital display terminal is used to receive the axial pressure data collected by the pressure sensor, and output the corresponding dynamic torque value for visualization based on the data.

3. The rotary handle of claim 2, wherein, The pressure sensor includes a sensor body and a sensor base sleeved on a rotating component, with the sensor body fixed to the sensor base. The digital display terminal is mounted on the circumferential side wall of the sensor base. The sensor base is located between the elastic element and the sensor body and is connected to the elastic element. The adjusting element abuts against the sensor body. The digital display terminal is electrically connected to the sensor body via a signal cable. When the rotating component rotates, it can drive the sensor base to drive the digital display terminal to rotate synchronously with the sensor body.

4. The rotary handle of claim 1, wherein The rotating component and the fixed component are coaxially arranged. The rotating component passes through the fixed component and can rotate around its own axis within the fixed component. The rotating handle also includes a bearing, a bearing washer, and a locking nut disposed between the rotating component and the fixed component. The rotating component passes through the bearing, the bearing washer, and the locking nut. The locking nut is screwed to the rotating component to press the inner ring of the bearing and the bearing washer onto the shoulder positioning surface of the rotating component. The inner ring of the bearing is fixed to the rotating component, and the outer ring of the bearing cooperates with the inner wall of the fixed component to achieve rotational support for the rotating component.

5. The rotary handle of claim 4, wherein, The outer ring of the bearing is clearance-fitted with the inner wall of the fixed member, so that the bearing can move relative to the fixed member along the axial direction of the rotating member.

6. The rotary handle of claim 2, wherein, The friction plate assembly includes a first friction plate and a second friction plate sleeved and circumferentially confined on the rotating component; along the axial direction of the rotating component, one side surface of the first friction plate is connected to the elastic component, and the other side surface is in contact with the end face of the fixed component; along the axial direction of the rotating component, both sides of the second friction plate are in contact with the fixed component and the rotating component, respectively.

7. The rotary handle of claim 6, wherein, The elastic element is a butterfly spring. One end of the butterfly spring along the axial direction of the rotating element is connected to the pressure sensor, and the other end is connected to the first friction plate. The adjusting element includes a self-locking nut screwed onto the rotating element and a nut washer sleeved on the rotating element. The nut washer abuts between the self-locking nut and the pressure sensor.

8. The rotary screw actuator of claim 1, wherein: The rotary crank also includes a rotary handle for inputting manual driving torque to the rotating component, the rotary handle being detachably connected to the end of the rotating component away from external equipment.

9. The rotary handle of claim 8, wherein, The rotating handle includes a handle, a shaft, and a crank joint arranged along the axial direction of the rotating component, and a rocker arm arranged perpendicular to the axial direction of the rotating component; the handle includes a hollow cavity, one end of the shaft passes through the hollow cavity and the other end is connected to the rocker arm, and a gap is left between the handle and the shaft so that the handle can rotate relative to the shaft; the crank joint is connected to the end of the rocker arm away from the shaft.

10. The rotary handle of claim 9, wherein, The crank handle connector is provided with a square groove, and the end of the rotating component is provided with a square boss; the square groove and the square boss are fitted together to form a circumferential limiting structure.

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