Variable pitch controllable magnetic force damping swing paddle clamp device

Abstract

This application relates to a variable pitch controllable magnetic damping oscillating propeller clamp device, including a propeller clamp assembly, a motor assembly, and propeller blades. The propeller clamp assembly includes a propeller clamp seat assembly and an oscillating arm assembly. The oscillating arm assembly includes an inverted U-shaped oscillating arm and two propeller blade mounting seats. An axial connection assembly is provided between the propeller blade mounting seats and the two ends of the inverted U-shaped oscillating arm. A rotation limiting assembly is provided between the two ends of the inverted U-shaped oscillating arm and one end of the axial connection assembly. An electromagnet assembly is provided on the propeller clamp seat assembly, and permanent magnets adapted to the two end faces of the electromagnet assembly are provided at the two ends of the inverted U-shaped oscillating arm. This invention belongs to the field of unmanned aerial vehicle (UAV) technology. It achieves precise adjustment and locking of the propeller blade pitch angle through a gear disk and a limiting mechanism, adapting to different flight requirements and improving control performance. The damping force is directly generated by the magnetic repulsion between the electromagnet and the permanent magnet, without the need for additional mechanical parts, resulting in fast response and more direct damping effect.

Description

Technical Field

[0001] This application relates to the field of unmanned aerial vehicle (UAV) technology, and in particular to a variable pitch controllable magnetic damping oscillating propeller clamp device. Background Technology

[0002] Most motor and propeller structures use a fixed pitch design, which makes it difficult to adapt to the thrust adjustment requirements under complex working conditions. Although some variable pitch mechanisms can adjust the blade angle, their pitch change actuators are complex and are prone to structural fatigue damage due to vibration when rotating at high speed or encountering obstacles. General oscillating propeller clips achieve damping function through elastic materials. After long-term use, the elastic materials are prone to damage and aging, which reduces their service life and affects the overall stability of the structure. Summary of the Invention

[0003] Therefore, it is necessary to provide a variable pitch controllable magnetic damping oscillating paddle clamp device, the specific technical solution of which is as follows.

[0004] A variable pitch controllable magnetic damping oscillating propeller clamp device includes a propeller clamp assembly, a motor assembly, and propeller blades. The propeller clamp assembly includes a propeller clamp seat assembly and an oscillating arm assembly connected to a turntable of the motor assembly. The oscillating arm assembly includes an inverted U-shaped oscillating arm rotatably connected to the propeller clamp seat assembly and two propeller blade mounting seats. An axial connection assembly is provided between the propeller blade mounting seats and the two ends of the inverted U-shaped oscillating arm. A rotation limiting assembly is provided between the two ends of the inverted U-shaped oscillating arm and one end of the axial connection assembly. An electromagnet assembly is provided on the propeller clamp seat assembly, and permanent magnets adapted to the two end faces of the electromagnet assembly are provided at both ends of the inverted U-shaped oscillating arm.

[0005] Furthermore, the axial connection assembly includes a first slot, a second slot, and a buckle assembly whose two ends engage with the first slot and the second slot at both ends of the inverted U-shaped rocker arm and the end of the blade mounting seat;

[0006] The rotation limiting component includes an end face gear disk one disposed at one end of the buckle component and an end face gear disk two disposed in a first slot. The outer end of the end face gear disk two can mesh with the end face gear disk one. A compression spring assembly that abuts against the back of the end face gear disk two is provided in the first slot.

[0007] Furthermore, the buckle assembly includes a pull shaft and a first chuck and a second chuck disposed at both ends of the pull shaft. The end face gear disk is disposed on the first chuck. The first chuck is a disc structure that can rotate within the first slot. The second chuck is provided with a flat structure, and the second slot is provided with a flat groove that can engage with the flat structure.

[0008] Furthermore, the buckle assembly also includes a pad block that blocks the bottom opening of the first slot. The pad block is provided with a first arc-shaped groove and a second arc-shaped groove that respectively support the pull shaft and the first chuck. The groove side walls of the inverted U-shaped rocker arm are provided with screw structures that connect to the pad block.

[0009] Furthermore, the back of the second end face gear disk has an annular protrusion, and the compression spring assembly is a wave spring sleeved on the outside of the annular protrusion; the top surfaces of both ends of the inverted U-shaped rocker arm have slots communicating with the first slot, and the slots have insert plates that can abut against the end face of the annular protrusion; the annular protrusion has latches on both sides, and the first slot has latches on both sides that are adapted to the latches. After the latches cooperate with the latches, they can restrict the rotation of the second end face gear disk. The end faces of both ends of the inverted U-shaped rocker arm are provided with angle scale lines, and the end of the blade mounting base is provided with pointer scale lines pointing to the angle scale lines.

[0010] Furthermore, the propeller clamp assembly includes a base connected to the motor and a hinge seat disposed on the base. The bottom surface of the base has a mounting groove, and the electromagnet assembly is installed in the mounting groove. A hinge shaft is provided between the top of the inverted U-shaped rocker arm and the hinge seat. The groove walls at both ends of the groove of the inverted U-shaped rocker arm can adapt to the two end faces of the electromagnet assembly. The permanent magnet is installed at both ends of the groove of the inverted U-shaped rocker arm.

[0011] Furthermore, the groove walls at both ends of the inverted U-shaped rocker arm are provided with positioning holes that communicate with the first slot. The permanent magnet is a thin plate structure adapted to the positioning groove. The slot communicates with the positioning hole. The insert plate is a ferromagnetic structure.

[0012] Furthermore, the motor assembly includes a stator and a rotor, the rotor being sleeved on the outside of the stator, and a turntable being provided on the top of the rotor; a fixed slip ring is provided in the central hole of the stator, and a brush is provided on the fixed slip ring; bearings are provided at the upper and lower ends of the central hole of the stator; a rotating cylinder that can be adapted to the bearing is provided on the turntable of the rotor, and a moving slip ring arranged inside the fixed slip ring is provided on the outer wall of the rotating cylinder.

[0013] Furthermore, the top of the rotating drum is provided with a contact power supply female connector, which is connected to the moving slip ring via a wire, and the contact power supply female connector can supply power to the electromagnet assembly.

[0014] Furthermore, the top end of the rotating drum is provided with a raised edge that connects to the turntable, and the bottom end of the rotating drum is provided with a pressure plate that abuts against the inner ring of the bearing. The pressure plate and the raised edge are provided with bolt structures.

[0015] Compared with existing technologies, the present invention has the following advantages:

[0016] The variable pitch controllable magnetic damping oscillating paddle clamp device of the present invention successfully integrates the variable pitch adjustment function with the active magnetic damping function through a sophisticated mechanical-electromagnetic hybrid system.

[0017] The "gear meshing and locking" mechanism solves the reliability problem of pitch maintenance. It achieves precise adjustment and locking of blade pitch through gear disk and limit mechanism, adapting to different flight requirements and improving control performance.

[0018] Furthermore, the "electromagnetic-permanent magnet" damping mechanism provides an intelligently controllable means of vibration suppression. It directly generates damping force through the magnetic repulsion between the electromagnet component and the permanent magnet, without the need for additional mechanical parts. It has a fast response speed and a more direct suppression effect. The entire design embodies a high degree of integration, functionality and practicality, providing an excellent solution for the propulsion system of high-performance aircraft. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a three-dimensional structural view of the variable pitch controllable magnetic damping oscillating paddle clamp device of the present invention;

[0021] Figure 2 This is a cross-sectional view of the variable pitch controllable magnetic damping oscillating paddle clamp device of the present invention.

[0022] Figure 3 This is an exploded view of the motor assembly in this invention;

[0023] Figure 4 This is a cross-sectional view of the motor assembly in this invention;

[0024] Figure 5 This is an enlarged cross-sectional view of the structure of the propeller clamp assembly and the propeller blade in this invention;

[0025] Figure 6 This is an enlarged perspective view of the structure of the rocker arm assembly in this invention;

[0026] Figure 7 This is an enlarged front view of the structure of the rocker arm assembly in this invention;

[0027] Figure 8 This is an enlarged sectional view of the structure connecting the inverted U-shaped rocker arm and the blade mounting base in this invention;

[0028] Figure 9 This is an enlarged perspective view of the inverted U-shaped rocker arm in this invention;

[0029] Figure 10 This is an enlarged exploded view of the structure of the blade mounting base and the snap-fit ​​assembly in this invention.

[0030] Explanation of reference numerals in the attached figures:

[0031] 1. Paddle clamp assembly; 2. Motor assembly; 3. Paddle blade; 11. Paddle clamp seat assembly; 12. Swing arm assembly; 21. Turntable; 22. Stator; 23. Rotor; 24. Fixed slip ring; 25. Bearing; 231. Rotary drum; 232. Moving slip ring; 233. Contact power supply female connector; 234. Lug; 235. Pressure plate; 236. Bolt structure; 241. Brush; 111. Base; 112. Hinge seat; 1111. Mounting slot; 121. Inverted U-shaped swing arm; 122. Paddle blade mounting seat; 1211. Slot; 1212. Insert plate; 1213. Screw structure; 1214. Positioning hole; 4. Axial connection assembly; 41. First slot; 42. Second slot; 43. Buckle assembly; 411. Block; 421. Flat groove; 431. Pull shaft; 432. First chuck; 433. Second chuck; 434. Flat structure; 435. Pad; 4351. First arc groove; 4352. Second arc groove; 5. Rotation limit assembly; 51. End face gear disk one; 52. End face gear disk two; 53. Compression spring assembly; 521. Annular protrusion; 522. Bayonet; 6. Electromagnet assembly; 7. Permanent magnet; 8. Hinge shaft. Detailed Implementation

[0032] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0033] The embodiments of the present invention will now be described.

[0034] Reference Figures 1-9As shown, this embodiment provides a variable pitch controllable magnetic damping oscillating propeller clamp device, including a propeller clamp assembly 1, a motor assembly 2, and a propeller blade 3. The propeller clamp assembly 1 includes a propeller clamp seat assembly 11 and an oscillating arm assembly 12 connected to the turntable 21 of the motor assembly 2. The oscillating arm assembly 12 includes an inverted U-shaped oscillating arm 121 rotatably connected to the propeller clamp seat assembly 11 and two propeller blade mounting seats 122. An axial connection assembly 4 is provided between the propeller blade mounting seats 122 and the two ends of the inverted U-shaped oscillating arm 121. A rotation limiting assembly 5 is provided between the two ends of the inverted U-shaped oscillating arm 121 and one end of the axial connection assembly 4. An electromagnet assembly 6 is provided on the propeller clamp seat assembly 11, and permanent magnets 7 adapted to the two end faces of the electromagnet assembly 6 are provided at the two ends of the inverted U-shaped oscillating arm 121. The variable pitch controllable magnetic damping oscillating propeller clamp device of the present invention consists of three main parts: a propeller clamp assembly 1, a motor assembly 2, and a propeller blade 3. The oscillating arm assembly 12 of the propeller clamp assembly 1 is hinged to the propeller clamp seat assembly 11 through an inverted U-shaped oscillating arm 121 to realize up and down oscillation. The propeller blade 3 is mounted through a propeller blade mounting seat 122. The propeller blade mounting seat 122 and the inverted U-shaped oscillating arm 121 are connected through an axial connection assembly 4 and a rotation limiting assembly 5 to realize the axial fixation and circumferential angle adjustment / locking of the propeller blade 3. The pitch angle of the propeller blade 3 can be adjusted and locked through the rotation limiting assembly 5.

[0035] Furthermore, an electromagnet assembly 6 is provided on the propeller clamp assembly 11. The magnetic poles at both ends of the electromagnet assembly 6 are the same or opposite to the magnetic poles of the permanent magnets 7 at both ends of the groove of the rocker arm assembly 12, so that the two ends of the electromagnet assembly 6 and the permanent magnets 7 at both ends generate magnetic repulsion. The two opposite magnetic forces act on the two ends of the rocker arm assembly 12 respectively, which will hinder the movement of the rocker arm assembly 12, thereby forming a damping effect. The magnitude of the damping force can be controlled by controlling the current of the electromagnet.

[0036] The motor assembly 2 drives the entire propeller clamp assembly 1 to rotate, generating thrust. When the flight attitude changes, the inverted U-shaped rocker arm 121 swings up and down around the hinge point. At this time, a magnetic force (attraction or repulsion) is generated between the electromagnet assembly 6 and the permanent magnet 7. This force resists the movement of the rocker arm, thus creating a damping effect. The magnitude of the damping force can be controlled by controlling the current of the electromagnet; this provides an active and controllable damping mechanism that effectively suppresses the propeller's "seesaw" vibration, improves flight stability, and does not affect the pitch angle setting.

[0037] Specifically, the axial connection assembly 4 includes a first slot 41, a second slot 42 provided at both ends of the inverted U-shaped rocker arm 121 and the end of the blade mounting seat 122, and a buckle assembly 43 whose two ends engage with the first slot 41 and the second slot 42.

[0038] The rotation limiting component 5 includes an end face gear disk 51 disposed at one end of the buckle component 43 and an end face gear disk 52 disposed in the first slot 41. The outer end of the end face gear disk 52 can mesh with the end face gear disk 51. The first slot 41 is provided with a compression spring component 53 that abuts against the back of the end face gear disk 52.

[0039] In this embodiment, the snap-fit ​​assembly 43 acts like a "pin," with its two ends respectively engaged in the first slot 41 and the second slot 42, achieving axial connection between the inverted U-shaped rocker arm 121 and the blade mounting base 122. The end face gear disks 51 and 52 remain meshed under the thrust of the compression spring assembly 53. Due to the toothed engagement between the gear disks, relative rotation between them is prevented, thereby locking the blade angle. The purpose is to decouple and integrate the axial fixing function and the circumferential locking function. The result is a compact structure, reliable locking, and when adjustment is needed, simply overcoming the spring force to separate the gear disks.

[0040] Specifically, the latching assembly 43 includes a pull shaft 431 and a first chuck 432 and a second chuck 433 disposed at both ends of the pull shaft 431. An end-face gear disk 51 is disposed on the first chuck 432. The first chuck 432 is a disc structure capable of rotating within the first slot 41. The second chuck 433 has a flattened structure 434, and the second slot 42 has a flattened groove 421 that engages with the flattened structure 434. In this embodiment, the latching assembly 43 consists of a pull shaft 431, a first chuck 432, and a second chuck 433. The end-face gear disk 51 is disposed on the first chuck, and the second chuck has a flattened structure 434 that engages with the flattened groove 421 on the blade mounting base. The flattened structure is an anti-rotation structure that ensures no relative rotation between the second chuck 433 and the blade mounting base 122; that is, the torque (the drag torque of the blade) is directly transmitted through the flattened structure. The first chuck 432 can rotate within the first slot 41, but its end face gear disk 51 is locked by the second end face gear disk 52. The purpose is to establish a clear torque transmission path: blade → blade mounting base → second chuck → pull shaft → first chuck → first end face gear disk 1 → locked second end face gear disk 2 → inverted U-shaped rocker arm, achieving synchronous rotation between the blade mounting base and the locking assembly. This ensures the effectiveness of angle locking and prevents the blade from twisting during operation.

[0041] Specifically, the back of the second end face gear disk 52 has a protruding annular protrusion 521, and the compression spring assembly 53 is a wave spring sleeved on the outside of the annular protrusion 521; the top surfaces of both ends of the inverted U-shaped rocker arm 121 have slots 1211 communicating with the first slot 41, and the slots 1211 have insert plates 1212 that can abut against the end face of the annular protrusion 521; the annular protrusion 521 has slots 522 on both sides, and the first slot 41 has blocks 411 on both sides that are adapted to the slots 522. After the blocks 411 cooperate with the slots 522, they can restrict the rotation of the second end face gear disk 52. The end faces of both ends of the inverted U-shaped rocker arm 121 are provided with angle scale lines, and the end of the blade mounting base 122 is provided with pointer scale lines pointing to the angle scale lines. In this embodiment, the pad block 435 is used to seal the bottom of the first slot 41 and is fastened with screws. The arc-shaped groove on it provides precise radial support for the pull shaft 431 and the first chuck 432, ensuring their smooth rotation and axial positioning. This facilitates the assembly, support, and maintenance of internal components. The result is improved rigidity and assembly accuracy of the entire assembly, guaranteeing long-term operational reliability.

[0042] Specifically, the latching assembly 43 further includes a pad 435 that blocks the bottom opening of the first slot 41. The pad 435 is provided with a first arc-shaped groove 4351 and a second arc-shaped groove 4352 that respectively support the pull shaft 431 and the first chuck 432. The groove side walls of the inverted U-shaped rocker arm 121 are provided with screw structures 1213 that connect to the pad 435. When the pitch needs to be adjusted, the insert plate 1212 is inserted into the slot, pressing against the annular protrusion 521, causing the end face gear disk 2 52 to retract against the force of the wave spring and disengage from the end face gear disk 1 51. At this time, the latch 411 is locked in the latch 522, preventing the end face gear disk 2 52 from rotating, while the user can rotate the blade (driving the end face gear disk 1 51 to rotate) to a new angle. After the insert plate is pulled out, the spring pushes the end face gear disk 2 52 to re-engage and lock with the end face gear disk 1 51. Angle Indication: By observing the relative position of the pointer on the blade mounting base 122 and the scale line on the inverted U-shaped rocker arm 121, the pitch angle can be accurately read and set. The aim is to achieve a fast, intuitive, precise manual adjustment mechanism with anti-misoperation (anti-rotation function). The effect is to make pitch angle adjustment as simple and reliable as "shifting gears," greatly improving ease of use and accuracy.

[0043] Specifically, the propeller clamp assembly 11 includes a base 111 connected to the motor assembly 2 and a hinge seat 112 disposed on the base 111. The bottom surface of the base 111 is provided with a mounting groove 1111, and the electromagnet assembly 6 is installed in the mounting groove 1111. A hinge shaft 8 is provided between the top of the inverted U-shaped rocker arm 121 and the hinge seat 112. The groove walls at both ends of the groove of the inverted U-shaped rocker arm 121 can adapt to the two end faces of the electromagnet assembly 6. The permanent magnet 7 is installed at both ends of the groove of the inverted U-shaped rocker arm 121.

[0044] Specifically, the groove walls at both ends of the inverted U-shaped rocker arm 121 are provided with positioning holes 1214 that communicate with the first slot 41. The permanent magnet 7 is a thin plate structure adapted to the positioning holes 1214. The slot 1211 communicates with the positioning holes 1214, and the insert plate 1212 is a ferromagnetic structure. The electromagnet assembly 6 is fixed on the base 111, and the permanent magnet 7 is fixed at both ends of the inverted U-shaped rocker arm 121. When the two are relatively close, a magnetic circuit is formed. After the ferromagnetic insert plate 1212 is inserted, it not only performs a mechanical function but also becomes part of the magnetic circuit, enhancing the magnetic flux and thus increasing the magnetic attraction force. This optimizes the performance of the magnetic damper and realizes the functional reuse of components. The effect is to improve space utilization and magnetic damping efficiency, making it possible to obtain greater damping force in a limited space.

[0045] Specifically, the motor assembly 2 includes a stator 22 and a rotor 23. The rotor 23 is sleeved on the outside of the stator 22, and a turntable 21 is provided on the top of the rotor 23. A fixed slip ring 24 is provided in the central hole of the stator 22, and a brush 241 is provided on the fixed slip ring 24. Bearings 25 are provided at the upper and lower ends of the central hole of the stator 22. A rotating cylinder 231 that can be adapted to the bearing 25 is provided on the turntable 21 of the rotor 23. A moving slip ring 232 arranged inside the fixed slip ring 24 is provided on the outer wall of the rotating cylinder 231.

[0046] Specifically, the top of the rotating drum 231 is provided with a contact power supply female head 233, which is connected to the moving slip ring 232 through a wire, and the contact power supply female head 233 can supply power to the electromagnet assembly 6.

[0047] Specifically, the top end of the rotating drum 231 is provided with a protruding edge 234 connected to the turntable 21, and the bottom end of the rotating drum 231 is provided with a pressure plate 235 that abuts against the inner ring of the bearing 25. The pressure plate 235 and the protruding edge 234 are provided with bolt structures 236.

[0048] In this embodiment, the motor adopts an external rotor structure, with rotor 23 driving the turntable 21 and rotating drum 231 to rotate. The fixed slip ring 24 at the center of stator 22 and brush 241 are stationary, while the moving slip ring 232 on the rotating drum rotates accordingly, achieving electrical contact. Power is ultimately transmitted to the electromagnet assembly 6 through the contact power supply female connector 233. The pressure plate 235, flange 234, and bolt structure 236 are used for bearing clamping and component fixing. The electrical energy from the external control circuit is transmitted through brush 241 and fixed slip ring 24 to the rotating moving slip ring 232, and then through wires to the contact power supply female connector 233 at the top, ultimately powering the rotating electromagnet assembly 6. This solves the problem of power transmission between rotating and stationary components. The effect is to achieve real-time, continuous, and reliable power supply to the electromagnet rotating at high speed, which is the foundation for the realization of the entire active magnetic damping function.

[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 above embodiments only illustrate one or more implementation methods of this application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A variable pitch controllable magnetic force damped swing paddle clamp device comprising a paddle clamp assembly (1), a motor assembly (2) and a paddle (3), characterized in that, The paddle clamp assembly (1) comprises a paddle clamp seat assembly (11) connected with a rotating disc (21) of the motor assembly (2) and a swing arm assembly (12), the swing arm assembly (12) comprises a reverse U-shaped swing arm (121) and two paddle mounting seats (122) which are up-down rotatably connected with the paddle clamp seat assembly (11), an axial connecting assembly (4) is arranged between the two ends of the reverse U-shaped swing arm (121) and the paddle mounting seats (122), and a rotation limiting assembly (5) is arranged between the two ends of the reverse U-shaped swing arm (121) and one end of the axial connecting assembly (4); an electromagnet assembly (6) is arranged on the paddle clamp seat assembly (11), and permanent magnets (7) which are adapted to the two end faces of the electromagnet assembly (6) are arranged at the two ends of the reverse U-shaped swing arm (121). The axial connecting assembly (4) comprises first and second clamping grooves (41, 42) arranged at the two ends of the reverse U-shaped swing arm (121) and the end portions of the paddle mounting seats (122), and a buckle assembly (43) which is clamped with the first and second clamping grooves (41, 42). The rotation limiting assembly (5) comprises an end face gear disc one (51) arranged at one end of the buckle assembly (43) and an end face gear disc two (52) arranged in the first clamping groove (41), the outer end of the end face gear disc two (52) can be engaged with the end face gear disc one (51), and an extrusion spring assembly (53) which abuts against the back surface of the end face gear disc two (52) is arranged in the first clamping groove (41). The buckle assembly (43) comprises a pull shaft (431) and first and second clamping discs (432, 433) arranged at the two ends of the pull shaft (431), the end face gear disc one (51) is arranged on the first clamping disc (432), the first clamping disc (432) is a disc structure which can rotate in the first clamping groove (41), the second clamping disc (433) is provided with a flat structure (434), and the second clamping groove (42) is provided with a flat groove (421) which can be clamped with the flat structure (434). The back surface of the end face gear disc two (52) is provided with an annular protrusion (521), the extrusion spring assembly (53) is a wave spring which is sleeved outside the annular protrusion (521), the top surface of the two ends of the reverse U-shaped swing arm (121) is provided with an insertion groove (1211) which is communicated with the first clamping groove (41), the insertion groove (1211) is provided with an insertion plate (1212) which abuts against the end surface of the annular protrusion (521), the two sides of the annular protrusion (521) are provided with a bayonet (522), the two sides in the first clamping groove (41) are provided with clamping blocks (411) which are adapted to the bayonet (522), the clamping blocks (411) and the bayonet (522) can limit the rotation of the end face gear disc two (52) after cooperation, the end surface of the two ends of the reverse U-shaped swing arm (121) is provided with an angle scale line, and the end portion of the paddle mounting seat (122) is provided with a pointer scale line which points to the angle scale line.

2. A variable pitch controllable magnetic force damped pendulum paddle clamp device according to claim 1, wherein, The buckle assembly (43) further comprises a pad (435) blocking the bottom end opening of the first clamping groove (41), and the pad (435) is provided with a first arc-shaped groove (4351) and a second arc-shaped groove (4352) for supporting the pull shaft (431) and the first chuck (432) respectively; the groove side walls of the inverted U-shaped swing arm (121) are provided with screw structures (1213) connected with the pad (435).

3. A variable pitch controllable magnetic force damped pendulum paddle clamp device according to claim 1, wherein, The paddle clamp seat assembly (11) comprises a base (111) connected with the motor assembly (2) and a hinged seat (112) provided on the base (111), the bottom surface of the base (111) is provided with a mounting groove (1111), and the electromagnet assembly (6) is mounted in the mounting groove (1111); a hinge shaft (8) is arranged between the top of the inverted U-shaped swing arm (121) and the hinged seat (112); the groove side walls at both ends of the inverted U-shaped swing arm (121) are adapted to the end faces of the electromagnet assembly (6); and the permanent magnet (7) is mounted at both ends of the groove of the inverted U-shaped swing arm (121).

4. A variable pitch controllable magnetic force damped pendulum paddle clamp apparatus as claimed in claim 3, wherein, The groove side walls at both ends of the inverted U-shaped swing arm (121) are provided with positioning holes (1214) in communication with the first clamping groove (41), the permanent magnet (7) is a thin plate structure matched with the positioning holes (1214), the insertion groove (1211) is in communication with the positioning holes (1214), and the insertion plate (1212) is a ferromagnetic structure.

5. A variable pitch controllable magnetic force damped pendulum paddle clamp apparatus as defined in claim 4, wherein, The motor assembly (2) comprises a stator (22) and a rotor (23), the rotor (23) is sleeved outside the stator (22), and the top of the rotor (23) is provided with a rotating disc (21); a fixed slip ring (24) is arranged in the center hole of the stator (22), the fixed slip ring (24) is provided with a brush (241), and the center hole of the stator (22) is provided with a bearing (25) at the upper and lower ends; the rotating disc (21) of the rotor (23) is provided with a rotating drum (231) matched with the bearing (25), and the outer wall of the rotating drum (231) is provided with a movable slip ring (232) arranged in the fixed slip ring (24).

6. A variable pitch controllable magnetic force damped pendulum paddle clamp apparatus as claimed in claim 5, wherein, The top end of the rotating drum (231) is provided with a contact power supply female head (233), the contact power supply female head (233) is connected with the movable slip ring (232) through a wire, and the contact power supply female head (233) can supply power to the electromagnet assembly (6).

7. A variable pitch controllable magnetic force damped pendulum paddle clamp apparatus as defined in claim 6, wherein, The top end of the rotating drum (231) is provided with a convex edge (234) connected with the rotating disc (21), the bottom end of the rotating drum (231) is provided with a pressing plate (235) abutting against the inner ring of the bearing (25), and the pressing plate (235) and the convex edge (234) are provided with a bolt structure (236).

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