A rotary electromagnetic unlocking mechanism

Abstract

The present invention provides a rotary electromagnetic unlocking mechanism, comprising: a housing, a split nut, a cage, a rotating disk and an electromagnetic driving assembly; the housing includes a bottom plate, a housing body and a top bracket; the bottom plate and the top bracket are respectively fixed at both ends of the housing body to form a hollow structure; the split nut is arranged on the bottom plate; the docking mechanism of the component to be unlocked penetrates through the bottom plate and is fixedly connected with the split nut; the cage is sleeved on the outer circumferential surface of the split nut; through holes are circumferentially arranged on the cage, and balls are arranged in the through holes for abutting against the corresponding split main body from the outer circumferential side of the split nut; the rotating disk is sleeved on the outer circumferential surface of the cage; grooves corresponding to the balls are arranged on the rotating disk; the electromagnetic driving assembly includes a fixed magnet and a rotating magnet; the fixed magnet is fixedly connected with the housing, and the rotating magnet is rotatably connected with the housing; the rotating magnet drives the rotating disk to rotate relative to the cage. This electromagnetic unlocking mechanism can reduce the impact force released during unlocking and achieve rapid unlocking.

Description

Technical Field

[0001] The present invention relates to the field of rotary unlocking mechanisms, and in particular to a rotary electromagnetic unlocking mechanism. Background Art

[0002] Traditionally, pyrotechnics have been used as release mechanisms in spacecraft. These mechanisms have drawbacks such as high release force, contaminant generation, and limitations in repeatable testing and use. Newer non-pyrotechnic release mechanisms, such as shape memory alloys, have issues with response time and synchronization, as well as inherent material performance limitations.

[0003] In order to reduce the impact force released during unlocking and achieve quick unlocking, it is particularly important to design a rotary electromagnetic unlocking mechanism. Summary of the Invention

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a rotary electromagnetic unlocking mechanism.

[0005] The present invention provides a rotary electromagnetic unlocking mechanism, comprising: a shell, a petal nut, a retaining frame, a rotating disk and an electromagnetic drive assembly; the shell comprises a bottom plate, a shell and a top bracket; the bottom plate and the top bracket are respectively fixed at both ends of the shell to form a hollow structure; the petal nut comprises at least two petal bodies, and at least two of the petal bodies are spliced to form a petal nut; in the hollow structure, the petal nut is arranged on the bottom plate and is coaxial with the shell; the docking mechanism of the assembly to be unlocked passes through the bottom plate and is fixedly connected to the petal nut; the retaining frame is sleeved on the circumferential outer side of the petal nut, leaving a gap between the circumferential outer side of the petal nut and the shell; the retaining frame is circumferentially provided with through holes corresponding to the petal bodies, and movable balls are arranged in the through holes, which are used to press against the corresponding petal bodies from the circumferential outer side of the petal nut, so that at least two petal bodies The body is spliced into a complete split nut; the rotating disk is sleeved on the circumferential outer side of the retaining frame and can rotate relative to the retaining frame; the rotating disk is provided with a groove corresponding to the ball; the electromagnetic drive component includes a fixed magnet and a rotating magnet; the fixed magnet is fixedly connected to the outer shell, and the rotating magnet is rotatably connected to the outer shell to rotate around the axial direction of the outer shell; the rotating magnet is fixedly connected to the rotating disk to drive the rotating disk to rotate relative to the retaining frame; when the electromagnetic drive component is not energized, the rotating disk presses against the ball at the part other than the groove, so that the ball presses against the split body and does not disperse; when the electromagnetic drive component is energized, the rotating magnet rotates relative to the fixed magnet, driving the rotating disk to rotate relative to the retaining frame until the groove is aligned with the through hole, the ball enters the groove, the split body of the split nut disperses, and the docking mechanism of the unlocking component is unlocked.

[0006] According to an embodiment of the present invention, the rotating magnet includes a winding assembly; the winding assembly includes an iron core and a coil wound around the outer circumference of the iron core; the winding assembly is rotatably connected to the housing to rotate around the axial direction of the outer shell; the winding assembly is fixedly connected to the rotating disk; the fixed magnet includes two permanent magnets circumferentially arranged around the inner wall of the housing; the opposite faces of the two permanent magnets are opposite magnetic poles; when the coil is energized, both ends of the iron core rotate towards the permanent magnets with opposite magnetic poles.

[0007] According to an embodiment of the present invention, it further includes a top disk and a top-pushing assembly; the top disk is fixedly arranged on the upper end surface of the cage and is fixedly connected to the housing; the top-pushing assembly includes a top-pushing cone block and a top-pushing spring; the top-pushing cone block abuts against the upper end surface of the split nut, and both ends of the top-pushing spring respectively abut against the top-pushing cone block and the top disk; when the coil is energized, under the elastic action of the top-pushing spring, the top-pushing cone block presses the split nut to disperse the split main body.

[0008] According to an embodiment of the present invention, the split nut includes 4 split main bodies, and the cage is provided with 4 balls corresponding to the 4 split main bodies.

[0009] According to an embodiment of the present invention, the top-pushing cone block is an inverted frustum shape; an inner chamfer is provided at the top of the circumferential inner side surface of the split nut; the top-pushing cone block cooperates with the inner chamfer to apply a thrust along the radial direction of the split nut to the inner side surface of the split nut.

[0010] According to an embodiment of the present invention, the top disk is fixedly provided with a guide shaft, and the top-pushing spring is sleeved on the guide shaft to perform radial direction limiting on the top-pushing spring.

[0011] According to an embodiment of the present invention, the top disk is provided with a limiting opening; support rods are respectively fixedly arranged at both ends of the winding assembly, and the support rods pass through the limiting opening and are fixedly connected to the rotating disk; the limiting opening limits the rotation angle of the rotating disk relative to the cage by restricting the support rods.

[0012] According to an embodiment of the present invention, along the axial direction of the outer shell, the winding assembly is provided with a rotating shaft; the rotating shaft is rotatably connected to the top bracket.

[0013] According to an embodiment of the present invention, a bearing is sleeved on the outer circumferential side surface of the rotating shaft, and the outer ring of the bearing is fixedly connected to the top bracket to reduce the friction between the rotating shaft and the top bracket.

[0014] According to one embodiment of the present invention, the winding assembly further includes a winding skeleton; the coil is wound around the circumferential outer side of the winding skeleton.

[0015] The rotary electromagnetic unlocking mechanism according to the present invention unlocks the component to be unlocked by electromagnetic principle, and has the advantages of small impact force released during unlocking, short response time, no pollution, and repeatable testing and use.

[0016] It should be understood that the foregoing general description and the following detailed description are merely exemplary and illustrative and are not intended to limit the scope of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The following drawings are a part of the specification of the present invention and illustrate exemplary embodiments of the present invention. Together with the description, the accompanying drawings serve to explain the principles of the invention.

[0018] Figure 1 is a perspective view of a rotary electromagnetic unlocking mechanism according to an embodiment of the present invention;

[0019] Figure 2 This Figure 1 Cross-section along AA direction;

[0020] Figure 3 yes Figure 2 Top view along BB direction;

[0021] Figure 4 is a top view of a winding assembly according to one embodiment of the present invention;

[0022] Figure 5 yes Figure 4 Cross-section along CC direction;

[0023] Figure 6 This is a diagram showing the positional relationship between the winding assembly and the permanent magnet when the rotary electromagnetic unlocking mechanism according to one embodiment of the present invention is in a locked state;

[0024] Figure 7 This is a diagram showing the position relationship between the winding assembly and the permanent magnet when the rotary electromagnetic unlocking mechanism according to one embodiment of the present invention is in the unlocked state;

[0025] Figure 8 This is a diagram showing the positional relationship between the split nut, balls, retainer, and rotating disk when the rotary electromagnetic unlocking mechanism according to one embodiment of the present invention is in the unlocked state;

[0026] Figure 9 It is a perspective view of a retaining frame and a top plate according to an embodiment of the present invention.

[0027] Description of reference numerals:

[0028] 1 - Base plate; 2 - Split nut; 3 - Ball; 4 - Cage; 5 - Rotating disk; 6 - Support rod; 7 - Thrust cone; 8 - Thrust spring; 9 - Winding assembly; 10 - Top bracket; 11 - Permanent magnet; 12 - Housing; 13 - Bearing; 14 - Top plate; 15 - Guide shaft; 16 - Limit port; 17 - Rotating shaft;

[0029] 91 - Iron core; 92 - Coil; 93 - Winding skeleton. Detailed implementation manner

[0030] The features and exemplary embodiments of various aspects of the present invention will be described in detail below. In order to make the objectives, technical solutions and advantages of the present invention more clear and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only configured to explain the present invention and are used to exemplarily illustrate the principles of the present invention, and are not configured to limit the present invention. Additionally, the components in the drawings are not necessarily drawn to scale. For example, the dimensions of some components or regions in the drawings may be enlarged for other components or regions to assist in understanding the embodiments of the present invention.

[0031] The orientation terms appearing in the following description are all the directions shown in the figures and do not limit the specific structure of the embodiments of the present invention. In the description of the present invention, it should be noted that unless otherwise specified, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] In addition, the terms "including", "comprising", "having" or any other variant thereof are intended to cover non-exclusive inclusion, so that a series of elements, structural components or components include not only those elements but also other structural components that are not explicitly listed or are inherent to the structural components and components. Without further limitation, the elements defined by the statement "including..." do not exclude the existence of additional identical elements in the articles or devices including the elements.

[0033] Spatial relationship terms such as "below", "beneath", "under", "lower", "above", "on", "higher", etc. are used for convenience of description to explain the positioning of one element relative to a second element, and are intended to cover different orientations of the device in addition to orientations different from those shown in the figures. Additionally, for example, "one element is on / under another element" can mean that the two elements are in direct contact, or it can mean that there are other elements between the two elements. Furthermore, terms such as "first", "second", etc. are also used to describe various elements, regions, parts, etc., and do not particularly refer to an order or sequence, and should not be construed as limiting. Similar terms denote similar elements throughout the description.

[0034] In the process of describing the present invention hereinafter, in certain scenario descriptions, only "rocket", "launch vehicle", "spacecraft", "space launch vehicle" or "missile" may be used. This is merely for convenience of description, and its connotation is not limited to the specific words used. Generally, the spacecraft / space launch vehicle of the present invention includes both launch vehicles for carrying satellites or spacecraft or other detectors, and various missiles, rockets, etc. used for carrying military payloads, as well as similar products capable of sending payloads into the air. Those skilled in the art should not limit the spacecraft / space launch vehicle to only one of a launch vehicle or a missile based on the specific words used in the description scenario, so as to narrow the protection scope of the present invention.

[0035] For those skilled in the art, the present invention can be implemented without some of these specific details. The following description of the embodiments is merely to provide a better understanding of the present invention by showing examples of the present invention.

[0036] Figure 1 is a perspective view of a rotary electromagnetic unlocking mechanism according to an embodiment of the present invention; Figure 2 is this Figure 1 a sectional view taken along the A-A direction; Figure 3 is Figure 2 a top view taken along the B-B direction;

[0037] Figure 4 is a top view of a winding assembly according to an embodiment of the present invention; Figure 5 is Figure 4 a sectional view taken along the C-C direction; Figure 6 is a diagram showing the positional relationship between the winding assembly and the permanent magnet when the rotary electromagnetic unlocking mechanism according to an embodiment of the present invention is in a locked state; Figure 7 is a diagram showing the positional relationship between the winding assembly and the permanent magnet when the rotary electromagnetic unlocking mechanism according to an embodiment of the present invention is in an unlocked state; Figure 8The figure shows the positional relationship among the split nut, the ball, the cage, and the rotating disk when the rotary electromagnetic unlocking mechanism according to an embodiment of the present invention is in the unlocked state; Figure 9 The figure is a perspective view of the cage and the top disk according to an embodiment of the present invention.

[0038] As Figure 1 , 2 As shown in FIGS. 1, 2 and 3, the present invention provides a rotary electromagnetic unlocking mechanism, including: a housing, a split nut 2, a cage 4, a rotating disk 5, and an electromagnetic driving assembly. The housing includes a bottom plate 1, a housing 12, and a top bracket 10. The bottom plate 1 and the top bracket 10 are respectively fixed at both ends of the housing 12 to form a hollow structure. The split nut 2 includes at least two split main bodies, and the at least two split main bodies are spliced to form a split nut 2. Inside the hollow structure, the split nut 2 is disposed on the bottom plate 1 and is coaxial with the housing 12. The docking mechanism of the component to be unlocked penetrates through the bottom plate 1 and is fixedly connected to the split nut 2. The cage 4 is sleeved on the outer circumferential surface of the split nut 2, leaving a gap between the cage 4 and the outer circumferential surface of the split nut 2, and is fixedly connected to the housing. The cage 4 is circumferentially provided with through holes corresponding to the split main bodies, and movable balls 3 are disposed in the through holes for abutting against the corresponding split main bodies from the outer circumferential side of the split nut 2, so that the at least two split main bodies are spliced into a complete split nut 2. The rotating disk 5 is sleeved on the outer circumferential surface of the cage 4 and is rotatable relative to the cage 4. The rotating disk 5 is provided with grooves corresponding to the balls 3. The electromagnetic driving assembly includes a fixed magnet and a rotating magnet. The fixed magnet is fixedly connected to the housing, and the rotating magnet is rotatably connected to the housing to rotate around the axial direction of the housing. The rotating magnet is fixedly connected to the rotating disk 5 to drive the rotating disk 5 to rotate relative to the cage 4. When the electromagnetic driving assembly is not powered on, the non-groove portion of the rotating disk 5 abuts against the ball 3, so that the ball 3 abuts against the split main body without scattering. When the electromagnetic driving assembly is powered on, the rotating magnet rotates relative to the fixed magnet, driving the rotating disk 5 to rotate relative to the cage 4 until the groove is aligned with the through hole, the ball 3 enters the groove, and the split main bodies of the split nut 2 are separated, unlocking the docking mechanism of the component to be unlocked.

[0039] In this embodiment, the bottom plate supports the split nut. The docking mechanism of the component to be unlocked may be provided with an external thread, and correspondingly, the split nut is provided with an internal thread. The through holes circumferentially provided in the cage can limit the balls in the axial direction of the housing. The split nut and the rotating disk can limit the balls in the radial direction of the housing. When installing the balls, the balls can be installed in the through holes of the cage from the outer side surface of the cage.

[0040] When the electromagnetic drive assembly is de-energized, the split main body of the split nut is spliced into a complete split nut under the extrusion of the ball and fixedly connected to the docking mechanism of the component to be unlocked. At this time, there is space between the cage and the split nut in the circumferential direction of the split nut, leaving enough space for the split main body to spread out and the main body to be unlocked to escape from the split nut. When the electromagnetic drive assembly is energized, due to the electromagnetic principle, the magnetic field force drives the rotating magnet to rotate, thereby driving the rotating disk to rotate to achieve unlocking. The unlocking mechanism releases a small impact force during unlocking, will not cause pollution, and can be tested and used repeatedly. In addition, compared with the shape memory alloy non-explosive unlocking device, the electromagnetic unlocking mechanism of this embodiment has a short response time, good synchronization, strong environmental adaptability, and low energy consumption and simpler control. Compared with the direct-acting electromagnetic unlocking, the electromagnetic unlocking mechanism of this embodiment adopts a rotary electromagnetic unlocking, which can provide a large bearing capacity with a small driving force, effectively reducing the volume of the unlocking mechanism.

[0041] The unlocking mechanism of this embodiment can be applied to scenarios such as satellite-rocket separation unlocking and solar wing pressure release device unlocking.

[0042] In this embodiment, between the top bracket and the housing, and between the bottom plate and the housing, they can be fixedly connected by screws or integrally formed.

[0043] As Figure 4 and 5 shown, according to an embodiment of the present invention, the rotating magnet includes a winding assembly 9. The winding assembly 9 includes an iron core 91 and a coil 92 wound around the outer circumference of the iron core 91. The winding assembly 9 is rotatably connected to the housing 12 to rotate around the axial direction of the housing. The winding assembly 9 is fixedly connected to the rotating disk 5. The fixed magnet includes two permanent magnets 11 circumferentially arranged on the inner wall of the housing 12. The opposite faces of the two permanent magnets 11 are opposite magnetic poles. When the coil 92 is energized, both ends of the iron core 91 rotate towards the permanent magnets 11 with opposite magnetic poles.

[0044] In this embodiment, the two permanent magnets can be arc-shaped adapted to the inner wall of the housing and symmetrically arranged with respect to the center axis perpendicular to the axial direction of the housing of the iron core. The iron core can be a soft magnetic alloy. The two permanent magnets can be magnetically adsorbed on the lower end face of the top bracket or the circumferential inner wall of the housing.

[0045] According to an embodiment of the present invention, in addition to the housing, the split nut 2, the cage 4, the rotating disk 5 and the electromagnetic drive assembly, the electromagnetic unlocking mechanism further includes a top plate 14 and a top push assembly. The top plate 14 is fixedly arranged on the upper end face of the cage 4 and fixedly connected to the housing 12. The top push assembly includes a top push cone 7 and a top push spring 8. The top push cone 7 abuts against the upper end face of the split nut 2, and both ends of the top push spring 8 abut against the top push cone 7 and the top plate 14 respectively. When the coil 92 is energized, the top push cone 7 squeezes the split nut 2 under the elastic action of the top push spring 8, causing the split main body to spread out.

[0046] In this embodiment, the cage is fixedly connected to the housing through the top plate. The top plate and the housing can be fixedly connected by screws or integrally formed. When the coil is not energized, the winding assembly is located at the symmetry axis position of the two permanent magnets under the action of the two permanent magnets and remains balanced (as Figure 6 shown). At this time, the support rod is fixedly connected to the rotating disk. The non-grooved part of the rotating disk abuts against the ball, and the ball abuts against the split body of the split nut to prevent it from falling apart. The split nut is pressed against the bottom plate by the pushing assembly, and the unlocking mechanism is in the locked state, playing a locking role for the component to be unlocked. When the coil is energized, according to the electromagnetic principle, the winding assembly becomes an electromagnet. The N and S poles are as Figure 7 shown. According to the principle of like poles repelling and opposite poles attracting, the winding assembly rotates relative to the permanent magnet around the rotation axis. The two ends of the iron core rotate towards the directions of the opposite poles with opposite names respectively. The support rod drives the rotating disk to rotate relative to the cage in the axial direction of the housing. When the groove of the rotating disk rotates to align with the through hole of the cage, due to the elastic force of the pushing spring, the pushing cone block squeezes the split nut, causing the split body to push the ball, prompting the ball to enter the groove of the rotating disk and no longer squeezing the split body. Coupled with the restriction of the bottom plate on the lower end surface of the split nut, the split body spreads along its radial direction (as Figure 8 shown), realizing the unlocking of the component to be unlocked. The unlocking mechanism of this embodiment effectively makes the split body of the split nut spread after breaking free from the restraint of the ball by setting the pushing assembly, improving the reliability of the spreading of the split nut, and thus improving the reliability of the unlocking mechanism.

[0047] After unlocking the component to be unlocked, the winding assembly is powered off, and the split nut is manually reset. The winding assembly returns to the initial non-energized balanced position, driving the rotating disk to rotate. The ball is squeezed and returns to the through hole position again to squeeze the split nut, preparing for the next unlocking.

[0048] According to an embodiment of the present invention, the split nut 2 includes 4 split bodies, and the cage 4 is provided with 4 balls 3 corresponding to the 4 split bodies.

[0049] In this embodiment, the split nut can be composed of four mutually independent 1 / 4 cylinders.

[0050] According to an embodiment of the present invention, the pushing cone block 7 is in the shape of an inverted frustum of a cone. The inner side surface of the split nut 2 is provided with an inner chamfer at the top. The pushing cone block 7 cooperates with the inner chamfer to apply a radial thrust to the inner side surface of the split nut 2.

[0051] According to an embodiment of the present invention, the top plate 7 is fixedly provided with a guide shaft 15, and the pushing spring 8 is sleeved on the guide shaft 15 to limit the pushing spring 8 in the radial direction.

[0052] In this embodiment, one end of the guiding shaft is fixedly arranged with the top plate, and the other end is not fixedly arranged with the pushing cone block, so that the pushing cone block moves in the direction away from the top plate (i.e., in the direction of the bottom plate) under the elastic action of the pushing spring.

[0053] Those skilled in the art can understand that it can also be that one end of the guiding shaft is fixedly connected to the pushing cone block, and the other end is not fixedly connected to the top plate.

[0054] According to an embodiment of the present invention, the top plate 14 is provided with a limiting opening 16. The two ends of the winding assembly 9 are respectively fixedly provided with support rods 6, and the support rods 6 pass through the limiting opening 16 and are fixedly connected to the rotating disk 5. The limiting opening 16 limits the rotation angle of the rotating disk 5 relative to the cage 4 by restricting the support rods 6.

[0055] In this embodiment, the connection between the support rod and the winding assembly, and between the support rod and the rotating disk can be a threaded connection. The two ends of the support rod are provided with external threads. Correspondingly, the two ends of the winding assembly (such as the two ends of the iron core) and the rotating disk are provided with threaded holes. One end of the support rod can pass through the threaded hole of the winding assembly and be fastened with a nut. The two ends of the support rod are respectively fixedly connected to the winding assembly and the rotating disk, and are integrated with the winding assembly and the annular rotating disk. When the winding assembly rotates, the rotating disk is driven to rotate relative to the cage through the support rod. Due to the limitation of the rotation angle of the support rod by the limiting opening, the control of the rotation angle of the rotating disk relative to the cage is realized.

[0056] According to an embodiment of the present invention, along the axial direction of the housing, the winding assembly 9 is provided with a rotating shaft 17. The rotating shaft 17 is rotatably connected to the top bracket 10.

[0057] According to an embodiment of the present invention, a bearing 13 is sleeved on the outer circumferential surface of the rotating shaft 17, and the outer ring of the bearing 13 is fixedly connected to the top bracket 10 to reduce the friction between the rotating shaft 17 and the top bracket 10.

[0058] For the electromagnetic unlocking mechanism provided in this embodiment, the outer ring of the bearing is fixedly connected to the top bracket, and the inner ring of the bearing is fixedly connected to the rotating shaft. For example, the top bracket holds the outer ring of the bearing (or becomes an integral body), which can prevent the bearing from moving up and down or rotating relative to the top bracket along the axial direction of the housing. The outer ring of the bearing is in interference fit with the rotating shaft. A bearing is arranged between the rotating shaft of the winding assembly and the top bracket, which reduces the frictional force between the winding assembly and the top bracket when the winding assembly rotates.

[0059] According to an embodiment of the present invention, an annular boss is arranged on the circumferential direction of the rotating shaft 17. The annular boss is located on the upper end surface of the bearing 13 or the top bracket 10, so that the bearing 13 or the top bracket 10 limits the rotating shaft in the axial direction, preventing the winding assembly 9 from disengaging from the bearing 13 or the top bracket 10.

[0060] According to an embodiment of the present invention, the winding assembly 9 further includes a winding bobbin 93. The coil 92 is wound around the outer lateral surface of the winding bobbin 93.

[0061] In this embodiment, the winding bobbin is made of a non-metallic material, such as polyimide can be used.

[0062] According to an embodiment of the present invention, the fixed magnet includes a winding assembly 9. The winding assembly 9 includes an iron core 91 and a coil 92 wound around the outer circumference of the iron core 91. The winding assembly 9 is fixedly connected to the housing 12 or the top bracket 10. The rotating magnet includes two permanent magnets 11 circumferentially arranged along the inner wall of the housing 12. The two permanent magnets 11 are rotatably connected to the outer shell to rotate circumferentially around the housing 12. The opposite surfaces of the two permanent magnets 11 are opposite magnetic poles. The permanent magnet is fixedly connected to the rotating disk 5 through a support rod 6. When the coil 92 is energized, the two permanent magnets 11 respectively rotate towards one end of the iron core with opposite magnetic poles, driving the rotating disk to rotate relative to the cage to unlock the component to be unlocked.

[0063] Those skilled in the art can understand that the electromagnetic drive assembly may include more than two permanent magnets. For example, 4 permanent magnets are provided. Two permanent magnets are arranged on both sides of the winding assembly respectively. The winding assembly is arranged within the circumference formed by the permanent magnets.

[0064] In the embodiments of the present invention, the bottom plate, split nut, top plate, winding assembly and top bracket may be coaxially arranged or eccentrically arranged. Those skilled in the art can understand that the coaxial arrangement of the above components is the optimal choice rather than the only choice.

[0065] The above embodiments of the present invention can be combined with each other and have corresponding technical effects.

[0066] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A rotary electromagnetic unlocking mechanism, characterized in that, include: Housing, split nut, retaining frame, rotating disk and electromagnetic drive assembly; the housing includes a bottom plate, a shell and a top bracket; The bottom plate and the top bracket are respectively fixed to the two ends of the shell to form a hollow structure; The split nut includes at least two split bodies, and at least two of the split bodies are spliced together to form the split nut; within the hollow structure, the split nut is disposed on the bottom plate and is coaxial with the housing; the docking mechanism of the component to be unlocked passes through the bottom plate and is fixedly connected to the split nut; The retaining frame is sleeved on the circumferential outer side surface of the split nut, leaving a gap between the retaining frame and the circumferential outer side surface of the split nut, and is fixedly connected to the shell; the retaining frame is circumferentially provided with through holes corresponding to the split bodies, and movable balls are provided in the through holes for pressing against the corresponding split bodies from the circumferential outer side of the split nut, so that at least two of the split bodies are spliced into a complete split nut; the rotating disk is sleeved on the circumferential outer side surface of the retaining frame and can rotate relative to the retaining frame; the rotating disk is provided with grooves corresponding to the balls; The electromagnetic drive assembly includes a fixed magnet and a rotating magnet; the fixed magnet is fixedly connected to the housing, and the rotating magnet is rotatably connected to the housing to rotate around the axial direction of the housing; the rotating magnet is fixedly connected to the rotating disk to drive the rotating disk to rotate relative to the retaining frame; When the electromagnetic drive assembly is not energized, the rotating disk presses against the ball at a position other than the groove, so that the ball presses against the petal body and does not disperse; when the electromagnetic drive assembly is energized, the rotating magnet rotates relative to the fixed magnet, driving the rotating disk to rotate relative to the retaining frame until the groove is aligned with the through hole, the ball enters the groove, the petal body of the petal nut disperses, and the docking mechanism of the unlocking assembly is unlocked.

2. The unlocking mechanism according to claim 1, wherein The rotating magnet includes a winding assembly; the winding assembly includes an iron core and a coil wound around the circumferential outside of the iron core; the winding assembly is rotatably connected to the shell so as to rotate around the axial direction of the shell; the winding assembly is fixedly connected to the rotating disk; the fixed magnet includes two permanent magnets arranged circumferentially around the inner wall of the shell; the opposing surfaces of the two permanent magnets are opposite poles; when the coil is energized, the two ends of the iron core rotate toward the permanent magnets with opposite poles.

3. The unlocking mechanism according to claim 2, wherein It also includes a top plate and a pushing assembly; the top plate is fixedly arranged on the upper end surface of the retaining frame and is fixedly connected to the shell; the pushing assembly includes a pushing cone block and a pushing spring; the pushing cone block presses against the upper end surface of the split nut, and the two ends of the pushing spring press against the pushing cone block and the top plate respectively; when the coil is energized, the pushing cone block squeezes the split nut under the elastic action of the pushing spring, so that the split body is dispersed.

4. The unlocking mechanism according to claim 1, wherein The split nut includes four split bodies, and the retaining frame is provided with four balls corresponding to the four split bodies.

5. The unlocking mechanism according to claim 3, characterized in that The pushing cone is an inverted frustum of a cone; an internal chamfer is provided at the top of the inner circumferential surface of the split nut; the pushing cone cooperates with the internal chamfer to apply a thrust force along the radial direction of the split nut to the inner circumferential surface of the split nut.

6. The unlocking mechanism according to claim 3, characterized in that, The top plate is fixedly provided with a guide shaft, and the pushing spring is sleeved on the guide shaft to limit the pushing spring in the radial direction.

7. The unlocking mechanism according to claim 3, wherein The top plate is provided with a limiting opening; support rods are fixedly provided at both ends of the winding assembly, and the support rods pass through the limiting opening and are fixedly connected with the rotating disc; the limiting opening limits the rotation angle of the rotating disc relative to the cage by restricting the support rods.

8. The unlocking mechanism according to claim 2, characterized in that, Along the axial direction of the housing, the winding assembly is provided with a rotating shaft; the rotating shaft is rotatably connected with the top bracket.

9. The unlocking mechanism according to claim 8, characterized in that, A bearing is sleeved on the outer circumferential surface of the rotating shaft, and the outer ring of the bearing is fixedly connected with the top bracket to reduce the friction between the rotating shaft and the top bracket.

10. The unlocking mechanism according to claim 2, wherein The winding assembly further includes a winding skeleton; the coil is wound around the outer circumferential surface of the winding skeleton.

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