CN110332277B - Vibration control device for curved thin-walled parts based on permanent magnet drive - Google Patents

Abstract

The invention provides a vibration control device for curved thin-walled parts based on permanent magnet drive, comprising an electromagnetic permanent magnet drive mechanism, a driven mechanism, a motion conversion mechanism and an adaptive top support mechanism; the electromagnetic permanent magnet drive mechanism is installed on the base, The electromagnetic permanent magnet drive mechanism is connected to the driven mechanism and provides a power source to the driven mechanism; the driven mechanism is connected to the motion conversion mechanism, and the motion conversion mechanism converts the reciprocating motion of the driven mechanism into vertical motion; the motion conversion mechanism is also installed on the base On the upper side, the motion transforming mechanism is connected with the self-adaptive top support mechanism, and the self-adaptive top support mechanism realizes up and down movement under the driving of the motion transform mechanism. In the vibration control device of the curved thin-walled part of the present invention, one drive source can realize the motion output of multiple positions, which saves the drive source and makes the overall structure of the system more compact. In addition, using the electromagnetic permanent magnet method to generate the power source, compared with the linear motor and the voice coil motor of the same size, the output stiffness of the electromagnetic permanent magnet drive mechanism is greater.

Description

Vibration control device for curved thin-walled parts based on permanent magnet drive

technical field

The present invention relates, in particular, to a vibration control device for curved thin-walled parts driven by permanent magnets.

Background technique

In the process of processing large thin-walled curved parts (such as aircraft and rocket skins), due to the large size of the workpiece and the small stiffness in the thickness direction, the vibration generated by the tool can easily excite the vibration of the thin-walled workpiece. In order to suppress the vibration, the present invention proposes an active vibration damping device based on permanent magnet drive.

The invention patent with publication number CN109590776A discloses a flexible clamp based on magnetorheological fluid, comprising a mounting seat, a telescopic body fixedly connected with the mounting seat, and a clamping body installed on the side of the telescopic ladder away from the mounting seat; the clamping body It includes a base, two movable collets, a magnetorheological fluid bag and an adjustable clamping screw; the adjustable clamping screw is connected to the side of the two movable collets close to the base. The torque transfer accuracy of this fixture is insufficient.

SUMMARY OF THE INVENTION

In view of the defects in the prior art, the purpose of the present invention is to provide a vibration control device for curved thin-walled parts driven by permanent magnets.

A vibration control device for curved thin-walled parts based on permanent magnet drive provided according to the present invention includes an electromagnetic permanent magnet drive mechanism, a driven mechanism, a motion conversion mechanism and an adaptive top support mechanism;

The electromagnetic permanent magnet drive mechanism is installed on the base, and the electromagnetic permanent magnet drive mechanism is connected to the driven mechanism and provides a power source to the driven mechanism;

The driven mechanism is connected with a motion conversion mechanism, and the motion conversion mechanism converts the reciprocating motion of the driven mechanism into vertical motion;

The motion transforming mechanism is also installed on the base, and the motion transforming mechanism is connected with the self-adaptive top support mechanism, and the self-adaptive top support mechanism realizes up and down movement under the driving of the motion transform mechanism.

Further, the electromagnetic permanent magnet drive mechanism enables the driven mechanism to reciprocate, and the electromagnetic permanent magnet drive mechanism includes an annular iron core with a pair of internal teeth, an electromagnetic coil, a permanent magnet and a permanent magnet rotating shaft;

Electromagnetic coils are arranged on a pair of inner teeth of the annular iron core, permanent magnets are arranged in the accommodating space between the two inner teeth, one end of the rotating shaft of the permanent magnets is fixed with the permanent magnets, and the other end is connected with the driven mechanism.

Further, the electromagnetic permanent magnet drive mechanism enables the driven mechanism to reciprocate, and the electromagnetic permanent magnet drive mechanism includes a soft magnetic core, an electromagnetic coil, a permanent magnet and a permanent magnet rotating shaft;

The soft magnetic core is two E-type iron cores with long ends and a short middle arranged opposite to each other to form an accommodation space, and the permanent magnets are placed in the accommodation space, and electromagnetic coils are wound on both ends of the E-type iron cores, The permanent magnet rotating shaft is placed vertically in the accommodating space after penetrating the through hole in the middle of the permanent magnet.

Further, the reciprocating motion of the driven mechanism is converted into a displacement output in the vertical direction through a motion conversion mechanism, and the driven mechanism is a cam direct driven driven mechanism, including a cam rotating shaft, a cam, a first push rod and a second push rod. putter;

The cam shaft is connected to the cam, the first push rod and the second push rod are symmetrically distributed along the radial direction of the cam and are in contact with the cam. Driven by the cam rotating shaft, the cam rotates and oscillates together, and when the cam rotates and oscillates, the first push rod and the second push rod are pushed to reciprocate.

Further, the shape of the cam is oval, the geometric center of the cam coincides with the cam shaft, and the cam is in contact with the first push rod and the second push rod at the same time, thereby ensuring that the first push rod and the second push rod are bidirectional. of linear motion.

Further, the cam direct driven mechanism further includes a first roller and a second roller;

The first roller is arranged between the first push rod and the cam and is connected with the first push rod; the second roller is arranged between the second push rod and the cam and is connected with the second push rod.

Further, the motion conversion mechanism adopts flexible hinge transmission, and the motion conversion mechanism includes a motion input part, a motion conversion intermediate part and a motion output part, the motion conversion intermediate part is installed on the base, and the motion output part is also installed. on the base;

The motion input component includes two radial motion components, which are respectively connected to the first push rod and the second push rod of the cam linear driven mechanism, so as to push the first push rod and the second push rod. The bidirectional linear motion of the rod is converted into its own radial linear motion;

The motion input part and the motion output part are respectively connected to the motion conversion intermediate part, and the motion conversion intermediate part converts the radial linear motion of the motion input part into the vertical linear motion of the motion output part.

Further, the self-adaptive top support mechanism adopts a floating spherical hinge top support head to contact the workpiece, and adjusts the contact position adaptively according to the change of the curvature of the workpiece surface to ensure the real-time contact with the workpiece and the consistent support force for the workpiece.

Further, the motion conversion mechanism includes an elastic tension frame, an inclined boss, a ball, and a "┐" deformation output assembly, one end of the "┐" deformation output assembly is fixed to the base, and the other end is provided with a ball, so The elastic tensioning frame is provided with an inclined boss, and the inclined boss is in contact with the ball;

the driven mechanism includes an oval cam;

An elastic tensioning frame is arranged on the periphery of the cam, and the elastic tensioning frame is subjected to the external thrust of the elliptical cam, resulting in deformation in the radial direction, so that the ball moves up and down on the inclined boss, so as to realize the "┐" deformation direction. The displacement output in the vertical direction of the output component.

Further, the motion conversion mechanism includes a ball and a "┐" deformation direction output assembly, one end of the "┐" deformation direction output assembly is fixed to the base, and the other end is provided with a ball;

The driven mechanism includes a rotatable circular table and a boss arranged on the circular table;

Above the boss of the circular table surface is the ball of the motion conversion mechanism, the ball is in contact with the boss, and the circular table surface is driven by the permanent magnet rotating shaft to generate a rotary motion, so that the boss on the circular table surface is deformed with the "┐" Contact the ball on the output assembly, and push up the "┐" deformation to the output assembly to generate displacement output in the vertical direction.

Compared with the prior art, the present invention has the following beneficial effects:

1. In the vibration control device for curved thin-walled parts of the present invention, one drive source can realize the motion output of multiple positions, which saves the drive source and makes the overall structure of the system more compact.

2. The vibration control device for curved thin-walled parts of the present invention uses an electromagnetic permanent magnet method to generate a power source, and the permanent magnet generates electromagnetic torque under the action of an alternating magnetic field around the electromagnetic coil; compared with a linear motor, the electromagnetic permanent magnet drive of the present invention The mechanism has no air gap between the stator and the mover; compared with the voice coil motor of the same size, the output rigidity of the electromagnetic permanent magnet drive mechanism of the present invention is higher.

3. The vibration control device of the curved thin-walled part of the present invention adopts two E-shaped iron cores to be arranged opposite each other, and the permanent magnet is placed in the center of the iron core, which increases the magnetic flux generated by the electromagnet and reduces the amount of noise in the magnetic circuit. of magnetic loss and magnetic leakage.

4. In the vibration control device for curved thin-walled parts of the present invention, the permanent magnet only swings back and forth within a certain angle range, which can ensure high-efficiency force transmission and good linearity.

Description of drawings

Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings:

1 is a schematic structural diagram of Embodiment 1 of the present invention;

2 is a schematic structural diagram of an electromagnetic permanent magnet drive mechanism according to Embodiment 1 of the present invention;

3 is a top view of the electromagnetic permanent magnet drive mechanism according to Embodiment 1 of the present invention;

FIG. 4 is a schematic structural diagram of the cam direct driven mechanism according to Embodiment 1 of the present invention;

5 is a schematic structural diagram of the motion conversion mechanism according to Embodiment 1 of the present invention;

6 is a schematic structural diagram of a motion transformation intermediate component and a motion input component in Embodiment 1 of the present invention;

7 is a schematic structural diagram of Embodiment 2 of the present invention;

8 is a schematic structural diagram of the electromagnetic permanent magnet drive mechanism according to Embodiments 2 and 3 of the present invention;

9 is a top view of the electromagnetic permanent magnet drive mechanism of Embodiments 2 and 3 of the present invention;

10 is a schematic structural diagram of the motion conversion mechanism according to Embodiment 2 of the present invention;

11 is a schematic structural diagram of Embodiment 3 of the present invention;

12 is a schematic structural diagram of a motion conversion mechanism according to Embodiment 3 of the present invention;

FIG. 13 is a schematic structural diagram of a driven mechanism according to Embodiment 3 of the present invention.

Detailed ways

The present invention will be described in detail below with reference to specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that, for those skilled in the art, several changes and improvements can be made without departing from the inventive concept. These all belong to the protection scope of the present invention.

The invention provides a vibration control device for curved thin-walled parts based on permanent magnet drive, comprising an electromagnetic permanent magnet drive mechanism, a driven mechanism, a motion conversion mechanism and an adaptive top support mechanism;

The electromagnetic permanent magnet drive mechanism is installed on the base through the first fixing auxiliary component, and the electromagnetic permanent magnet drive mechanism is connected to the driven mechanism and provides a power source to the driven mechanism;

The driven mechanism is connected to the motion conversion mechanism, and the motion conversion mechanism converts the reciprocating motion of the driven mechanism into vertical motion;

The motion transforming mechanism is installed on the base through the second fixed auxiliary component, the motion transforming mechanism is connected with the self-adaptive top support mechanism, and the self-adaptive top support mechanism realizes up and down movement under the driving of the motion transform mechanism.

Example 1

As shown in FIGS. 1 to 6 , a vibration control device for curved thin-walled parts based on permanent magnet drive includes an electromagnetic permanent magnet drive mechanism 1, a driven mechanism 2, a motion conversion mechanism 3 and an adaptive top support mechanism 4; electromagnetic The permanent magnet drive mechanism 1 is installed on the base 5 through the first fixing auxiliary component (specifically, the fixing block 6), and the motion conversion mechanism 3 is installed on the base 5 through the second fixing auxiliary component (including the first fixing column 7 and the second fixing column 8). On the base 5, the electromagnetic permanent magnet drive mechanism 1 is connected to the driven mechanism 2 and provides a power source to the driven mechanism 2; the driven mechanism 2 is connected to the motion conversion mechanism 3, and the motion conversion mechanism 3 converts the reciprocating motion of the driven mechanism 2 into Vertical movement; the motion transforming mechanism 3 is connected to the self-adaptive top support mechanism 4 , and the self-adaptive top support mechanism 4 realizes up and down movement under the driving of the motion transforming mechanism 3 .

The electromagnetic permanent magnet drive mechanism 1 includes a soft magnetic core 101, an electromagnetic coil 102, a permanent magnet 103 and a permanent magnet rotating shaft 104; in order to increase the magnetic flux generated by the electromagnet and reduce the magnetic loss and magnetic leakage in the magnetic circuit, the soft magnetic core 101 Preferably, two E-shaped iron cores with long ends and a short middle are arranged opposite to each other to form an accommodating space, and the permanent magnet 103 is placed in the accommodating space, and two turns of electromagnetic coils are wound on both ends of the E-shaped iron core to form a accommodating space. Improve the utilization rate of magnetic flux and magnetic energy, and can avoid interference with the rotation of the permanent magnet 103. The permanent magnet rotating shaft 104 penetrates the through hole in the middle of the permanent magnet 103 and is placed vertically in the accommodating space. The strength of the electromagnetic field generated by the soft magnetic core 101 can be passed through The number of turns of the electromagnetic coil 102 and the strength of the energized current are adjusted; the angle of rotation and swing of the permanent magnet 103 and the permanent magnet shaft 104 in the electromagnetic field is adjusted by adjusting the current input to the electromagnetic coil 102 .

The driving torque of the electromagnetic permanent magnet type is generated by the interaction of the electromagnetic field and the permanent magnetic field. The soft magnetic core is used as the stator, and the permanent magnet 103 is used as the mover. Swing back and forth. Under the electromagnetic field, the permanent magnet 103 will generate torque. Under the action of this torque, the permanent magnet 103 drives the permanent magnet rotating shaft 104 connected to it to rotate through the same angle synchronously. Under the action of a certain sine and cosine current, the permanent magnet 103 will swing back and forth in the electromagnetic field.

The driven mechanism 2 is a cam direct driven driven mechanism, including a cam shaft 21 , a cam 22 , a first push rod 23 and a second push rod 24 ; the cam shaft 21 is connected to the cam 22 , the first push rod 23 and the second push rod 24 It is symmetrically distributed along the radial direction of the cam 22 and is in contact with the cam 22. The cam shaft 21 is connected to the permanent magnet shaft 104 of the electromagnetic permanent magnet drive mechanism as a whole. The cam 22 rotates and swings together under the drive of the cam shaft 21. The first push rod 23 and the second push rod 24 reciprocate.

The contour line of the cam 22 is an ellipse, the geometric center of the cam 22 coincides with the cam shaft 21, and the cam 22 is in contact with the first push rod 23 and the second push rod 24 at the same time, thereby ensuring that the first push rod 23 and the second push rod 24 Do two-way linear motion.

The cam direct driven mechanism also includes a first roller 25 and a second roller 26; the first roller 25 is arranged between the first push rod 23 and the cam 22 and is connected with the first push rod 23; the second roller 26 is disposed between the second push rod 24 and the cam 22 and is connected with the second push rod 24 . The first roller 25 and the second roller 26 can reduce friction and wear in the transmission of the cam 22 . Through radial and axial fixation, the movements of the cam 22 and the cam shaft 21 are kept synchronized. The first push rod 23 and the second push rod 24 are integrally connected with the motion conversion mechanism 3 through adjustment bolts. In Figure 4(a), A, B, and C respectively represent three different positions of the push rod movement. When the cam direct driven mechanism passes through the position A-B-A-C-A, the displacement transformations of the first push rod 23 and the second push rod 24 are shown in Figures 4(b) and 4(c), respectively.

The motion conversion mechanism 3 is driven by a flexible hinge. The motion conversion mechanism 3 includes a motion input part 31, a motion conversion intermediate part 32 and a motion output part 33. The motion conversion intermediate part 32 is installed on the base 5 through the first fixing column 7, and the motion output part 33 is mounted on the base 5 through the second fixing column 8;

The motion input part 31 includes two radial motion parts, which are respectively connected to the first push rod 23 and the second push rod 24 of the cam linear follower mechanism, so as to push the first push rod 23 and the second push rod 24 . The bidirectional linear motion of the rod 24 (X direction in FIG. 5 and FIG. 6 ) is converted into its own radial linear motion (Y direction in FIG. 5 and FIG. 6 );

The motion input part 31 and the motion output part 33 are respectively connected to the motion conversion intermediate part 32, and the motion conversion intermediate part 32 can convert the radial linear motion of the motion input part 31 into the vertical linear motion of the motion output part 33 (Fig. 5, Fig. 6 in the Z direction).

The motion transforming mechanism 3 includes motion reversing in the horizontal plane and the vertical plane, wherein through the horizontal reversing structure, the horizontal reversing part in the motion transforming mechanism 3 is cut from a whole circular aluminum alloy plate by using an EDM wire. , the bidirectional linear motion of the push rod becomes the radial linear motion of the four radial moving parts in the circumferential direction of the platform; through the vertical reversing structure, the horizontal radial linear motion of the four radial moving parts in the circumferential direction becomes the motion output The component 33 (or the four self-adaptive top support mechanisms 4 connected with the motion output component 33) move in four vertical directions. The motion conversion mechanism 3 can adopt different ways to realize the conversion of motion. This embodiment adopts a flexible hinge type The motion conversion structure is conducive to improving the overall transmission accuracy of the system. The reason is that the horizontal reversing part in the motion conversion mechanism 3 is cut from a whole circular aluminum alloy plate by EDM wire, which is conducive to improving the motion reversing. The precision of the movement input member 31 and the first push rod 23 and the second push rod 24 of the cam direct driven follower mechanism are connected together by pre-tightening bolts, so that force transmission can be carried out, and flexible motion transformation can be used at the same time. The mechanism 3 applies pre-pressure to the two push rods to ensure real-time contact between the cam 22 and the two push rods. The motion conversion intermediate part 32 and the motion output part 33 are consolidated by bonding.

The position of the self-adaptive top support mechanism 4 in contact with the workpiece adopts a floating spherical hinge top support head, which can adaptively adjust the contact position according to the change of the curvature of the workpiece surface to ensure real-time contact with the workpiece and the same supporting force to the workpiece. Four adaptive top support mechanisms 4 are fixed on the four output ends of the motion conversion mechanism 3, and there are floating ball hinges in the top support head to ensure that the vibration control device can contact the thin-walled curved surface workpiece 9 in real time.

In Embodiment 1 of the present invention, the electromagnetic permanent magnet drive mechanism 1 generates a stable swing source; the cam direct driven mechanism and the electromagnetic permanent magnet drive mechanism 1 are connected together through the cam shaft 21, and the back and forth swing of the permanent magnet 103 becomes a cam The reciprocating movement of the direct driven mechanism; the electromagnetic permanent magnet drive mechanism 1 and the cam direct driven driven mechanism are placed horizontally; the reciprocating movement in the horizontal plane is transformed into the vertical up and down movement by the motion conversion mechanism 3, and the up and down movement is used as the whole device The final output motion can offset the modal vibration of the curved thin-walled part 9; the self-adaptive top support mechanism 4 can adaptively support the curved thin-walled part 9; the fixing auxiliary component can limit, connect and fix the aforementioned functional components. The present invention uses the electromagnetic permanent magnet method to generate the power source, and the permanent magnet 103 generates electromagnetic torque under the action of the alternating magnetic field around the electromagnetic coil 102. Compared with the linear motor, the electromagnetic actuator has no air gap between the stator and the mover. ; Compared with a voice coil motor of the same size, its output is more rigid. Under the action of the electromagnetic torque, the cam 22 coaxial with the permanent magnet 103 will also follow the rotation, and the cam linear driven mechanism is moved back and forth near the starting position by using the specially designed cam contour line. The cam 22 in the present invention is not a cam in the traditional sense, it only swings back and forth within a certain angle range, which can ensure higher efficiency of force transmission and better linearity.

Example 2

As shown in FIGS. 7 to 10 , in terms of driving principle, electromagnetic coil design, etc., this embodiment is consistent with Embodiment 1, and the main change is the design of the motion conversion mechanism 3, which adopts a polygonal tension structure based on elastic materials. 301.

A vibration control device for curved thin-walled parts based on permanent magnet drive, comprising an electromagnetic permanent magnet drive mechanism 1, a driven mechanism 2, a motion conversion mechanism 3 and an adaptive top support mechanism 4; an electromagnetic permanent magnet drive mechanism 1 and a motion conversion mechanism 3 is installed on the base 5, the electromagnetic permanent magnet drive mechanism 1 is connected to the driven mechanism 2, and provides a power source to the driven mechanism 2; the driven mechanism 2 contacts the motion conversion mechanism 3, and the motion conversion mechanism 3 will be driven The motion is converted into vertical motion; the motion transforming mechanism 3 is connected to the self-adaptive top support mechanism 4 , and the self-adaptive top support mechanism 4 realizes up and down movement under the drive of the motion transform mechanism 3 .

The driven mechanism 2 includes an oval cam 201; the electromagnetic permanent magnet drive mechanism 1 includes an annular iron core 101 with a pair of internal teeth, an electromagnetic coil 102, a permanent magnet 103 and a permanent magnet rotating shaft 104. A pair of inner teeth is provided with an electromagnetic coil 102, a permanent magnet 103 is arranged in the accommodation space between the two inner teeth, one end of the permanent magnet rotating shaft 104 is fixed with the permanent magnet 103, and the other end is connected with the geometric center of the oval cam 201. 201 is driven by the permanent magnet rotating shaft 104 to rotate; under the electromagnetic field shown in FIG. 10, the permanent magnet 103 will generate a counterclockwise torque, so that the direction of its internal magnetic field is consistent with the direction of the external electromagnetic field. Under the action of this torque, The permanent magnet 103 drives the permanent magnet rotating shaft 104 connected to it to rotate counterclockwise through the same angle synchronously. Under the action of a certain sine and cosine current, the permanent magnet 103 will swing back and forth in the electromagnetic field.

The motion conversion mechanism 3 includes an elastic tension frame 301, an inclined boss 302, a ball 303, and a "┐" deformation direction output assembly 304. One end of the "┐" deformation direction output assembly 304 is fixed to the base 5, and the other end is provided with a ball 303, The elastic tension frame 301 is provided with an inclined boss 302, and the inclined boss 302 is in contact with the ball 303;

An elastic tensioning frame 301 is arranged on the periphery of the oval-shaped cam 201. The elastic tensioning frame 301 is subjected to the external thrust of the oval-shaped cam 201, and the edge of the elastic tensioning frame is deformed in the radial direction, so that the balls 303 are in the inclined boss 302. Move up and down, so as to realize the displacement output of the “┐” deformation in the vertical direction of the output component 304 .

In this embodiment, the motion transformation mechanism 3 adopts a polygonal elastic tension frame 301 based on elastic materials. In the alternating magnetic field, the electromagnetic coil 102 drives the permanent magnet 103 and drives the cam 201 to swing at the same time, so that the polygonal elastic tensioning frame 301 is deformed. The inclined bosses 302 arranged on the polygonal elastic tensioning frame 301 and the balls 303 on the direction-changing output assembly 304 form a slider pair, so that the direction-changing output assembly 304 is actuated in the vertical direction to control the movement of the curved thin-walled workpiece 9 . vibration. Compared with Embodiment 1, in this embodiment, the motion conversion mechanism reduces the number of flexible hinges in the motion conversion assembly, reduces the structural complexity of the system, and improves the overall stiffness and response speed of the device.

Example 3

As shown in FIGS. 9 to 13 , in terms of driving principle, electromagnetic coil design, etc., this embodiment is consistent with Embodiment 2, and the main change is the design of the motion conversion mechanism 3, which adopts a disc structure with a boss.

A vibration control device for curved thin-walled parts based on permanent magnet drive, comprising an electromagnetic permanent magnet drive mechanism 1, a driven mechanism 2, a motion conversion mechanism 3 and an adaptive top support mechanism 4; an electromagnetic permanent magnet drive mechanism 1 and a motion conversion mechanism 3 is installed on the base 5, the electromagnetic permanent magnet drive mechanism 1 is connected to the driven mechanism 2, and provides a power source to the driven mechanism 2; the driven mechanism 2 is connected to the motion conversion mechanism 3, and the motion conversion mechanism 3 will be driven The motion is converted into vertical motion; the motion transforming mechanism 3 is connected to the self-adaptive top support mechanism 4 , and the self-adaptive top support mechanism 4 realizes up and down movement under the drive of the motion transform mechanism 3 .

The electromagnetic permanent magnet drive mechanism 1 includes a soft magnetic core 101, an electromagnetic coil 102, a permanent magnet 103 and a permanent magnet rotating shaft 104; the inner surface of the soft magnetic core 101 has two oppositely arranged inner teeth, and the two inner teeth are respectively wound with electromagnetic coils 102, one end of the permanent magnet rotating shaft 104 is fixed with the permanent magnet 103, and the other end is connected with the geometric center of the circular mesa 211; by adjusting the direction of the energized current in the electromagnetic coil 102, the polarity of the two inner teeth on the inner surface of the soft magnetic core 101 is adjusted on the contrary. Under the electromagnetic field shown in FIG. 10 , the permanent magnet 103 will generate a counterclockwise torque, so that the direction of its internal magnetic field is consistent with the direction of the external electromagnetic field. Under the action of this torque, the permanent magnet 103 drives the permanent magnet connected to it. The rotating shaft 104 rotates counterclockwise through the same angle synchronously, and under the action of a certain sine and cosine current, the permanent magnet 103 will swing back and forth in the electromagnetic field.

The driven mechanism 2 includes a rotatable circular table surface 211 and a boss 212 arranged on the circular table surface 211;

The motion conversion mechanism 3 includes a ball 303 and a "┐" deformation output assembly 304, one end of the "┐" deformation output assembly 304 is fixed to the base 5, and the other end is provided with a ball 303;

Above the boss 212 of the circular table surface 211 is the ball 303 of the motion conversion mechanism, the ball 303 is in contact with the boss 212, and the circular table surface 211 is driven by the permanent magnet rotating shaft 104. The "┐" deformed toward the ball 303 on the output assembly 304 contacts, and the "┐" deformed toward the output assembly 304 is pushed up to generate displacement output in the vertical direction.

In this embodiment, the motion conversion mechanism 3 adopts a disc structure with a boss device. The oscillating permanent magnet 103 directly drives the circular mesa 211. When the boss 212 on the circular mesa 211 is in contact with the ball 303 on the “┐” deformed output assembly 304, it can push the “┐” deformed output assembly 304 in the vertical direction. Displacement is generated in the direction to control the vibration of thin-walled curved workpieces. Compared with Embodiment 2, in this embodiment, the motion transformation mechanism reduces the potential energy loss caused by the elastic deformation of the structure in the device, and improves the utilization rate of energy and the consistency of the mechanism movement.

In the description of this application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", The orientation or positional relationship indicated by "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying the indicated device. Or elements must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as a limitation of the present application.

Specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the above-mentioned specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the essential content of the present invention. The embodiments of the present application and features in the embodiments may be combined with each other arbitrarily, provided that there is no conflict.

Claims (9)

1. a curved surface thin-walled vibration control device based on permanent magnet drive, is characterized in that, comprises electromagnetic permanent magnet drive mechanism, driven mechanism, motion conversion mechanism and self-adaptive top support mechanism; The electromagnetic permanent magnet drive mechanism is installed on the base, and the electromagnetic permanent magnet drive mechanism is connected to the driven mechanism and provides a power source to the driven mechanism; The driven mechanism is connected with a motion conversion mechanism, and the motion conversion mechanism converts the reciprocating motion of the driven mechanism into vertical motion; The motion conversion mechanism is also installed on the base, and the motion conversion mechanism is connected with an adaptive top support mechanism, which realizes up and down movement under the driving of the motion conversion mechanism, and the adaptive top support mechanism adopts a floating The spherical hinge top support head is in contact with the workpiece. According to the change of the curvature of the workpiece surface, the contact position is adjusted adaptively to ensure that it is in real-time contact with the workpiece and has a consistent support force on the workpiece. 2 . The vibration control device for curved thin-walled parts based on permanent magnet drive according to claim 1 , wherein the electromagnetic permanent magnet drive mechanism causes the driven mechanism to reciprocate, and the electromagnetic permanent magnet drive mechanism comprises a belt. 3 . There is a ring-shaped iron core with a pair of internal teeth, an electromagnetic coil, a permanent magnet and a permanent magnet rotating shaft; Electromagnetic coils are arranged on a pair of inner teeth of the annular iron core, permanent magnets are arranged in the accommodating space between the two inner teeth, one end of the rotating shaft of the permanent magnets is fixed with the permanent magnets, and the other end is connected with the driven mechanism. 3 . The vibration control device for curved thin-walled parts based on permanent magnet drive according to claim 2 , wherein the electromagnetic permanent magnet drive mechanism causes the driven mechanism to reciprocate, and the electromagnetic permanent magnet drive mechanism includes a soft Magnetic core, electromagnetic coil, permanent magnet and permanent magnet shaft; The soft magnetic core is two E-type iron cores with long ends and a short middle arranged opposite to each other to form an accommodation space, and the permanent magnets are placed in the accommodation space, and electromagnetic coils are wound on both ends of the E-type iron cores, The permanent magnet rotating shaft passes through the through hole in the middle of the permanent magnet and is placed vertically in the accommodating space. 4 . The vibration control device for curved thin-walled parts based on permanent magnet drive according to claim 3 , wherein the reciprocating motion of the driven mechanism is converted into a displacement output in the vertical direction through a motion conversion mechanism, and the The driven mechanism is a cam direct driven driven mechanism, including a cam shaft, a cam, a first push rod and a second push rod; The cam shaft is connected to the cam, the first push rod and the second push rod are symmetrically distributed along the radial direction of the cam and are in contact with the cam. Driven by the cam rotating shaft, the cam rotates and oscillates together, and when the cam rotates and oscillates, the first push rod and the second push rod are pushed to reciprocate. 5 . The vibration control device for curved thin-walled parts based on permanent magnet drive according to claim 4 , wherein the cam has an oval shape, the geometric center of the cam coincides with the cam rotation axis, and the cam is aligned with the first cam. 6 . The push rod and the second push rod are in contact at the same time, thereby ensuring that the first push rod and the second push rod perform bidirectional linear motion. 6 . The vibration control device for curved thin-walled parts based on permanent magnet drive according to claim 4 , wherein the cam linear driven mechanism further comprises a first roller and a second roller; 6 . The first roller is arranged between the first push rod and the cam and is connected with the first push rod; the second roller is arranged between the second push rod and the cam and is connected with the second push rod. 7 . The vibration control device for curved thin-walled parts based on permanent magnet drive according to claim 4 , wherein the motion conversion mechanism adopts a flexible hinge drive, and the motion conversion mechanism comprises a motion input component and a motion conversion intermediate component 7 . and a motion output component, the motion conversion intermediate component is mounted on the base, and the motion output component is also mounted on the base; The motion input component includes two radial motion components, which are respectively connected to the first push rod and the second push rod of the cam linear driven mechanism, so as to push the first push rod and the second push rod. The bidirectional linear motion of the rod is converted into its own radial linear motion; The motion input part and the motion output part are respectively connected to the motion conversion intermediate part, and the motion conversion intermediate part converts the radial linear motion of the motion input part into the vertical linear motion of the motion output part. 8 . The vibration control device for curved thin-walled parts based on permanent magnet drive according to claim 1 , wherein the motion conversion mechanism comprises an elastic tension frame, an inclined boss, a ball and

deformation to the output component, the

One end of the deformation direction output assembly is fixed with the base, the other end is provided with a ball, the elastic tensioning frame is provided with an inclined boss, and the inclined boss is in contact with the ball; the driven mechanism includes an oval cam; An elastic tensioning frame is arranged on the periphery of the cam, and the elastic tensioning frame is subjected to the external thrust of the elliptical cam, resulting in deformation in the radial direction, so that the ball moves up and down on the inclined boss, so as to realize

The deformation outputs the displacement in the vertical direction of the output component. 9 . The vibration control device for curved thin-walled parts based on permanent magnet drive according to claim 1 , wherein the motion conversion mechanism comprises balls and

deformation to the output component, the

One end of the deformation direction output assembly is fixed with the base, and the other end is provided with a ball; The driven mechanism includes a rotatable circular table and a boss arranged on the circular table; Above the boss of the circular table surface is the ball of the motion conversion mechanism, the ball is in contact with the boss, and the circular table surface is driven by the rotating shaft of the permanent magnet to rotate, so that the boss on the circular table surface is in contact with the boss.

The deformation contacts the balls on the output assembly, jacking up

Deform the output component to produce a displacement output in the vertical direction.

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