Spring-type electromagnetic rotary unlocking mechanism

Abstract

This utility model discloses a spring-type electromagnetic rotary unlocking mechanism, including a front housing, a spring, a pull rod, a steel ball, a support base, a magnetic circuit, a rear housing, a pressure wire component, and a drive mechanism interface. One end of the front housing has a hole for the pull rod to pass through, and the other end presses against the support base and connects to one end of the rear housing. The pull rod is arranged with a first-stage cylinder, a second-stage cylinder, and a third-stage cylinder in ascending order of diameter. The third-stage cylinder provides an end face for spring compression. The second and third-stage cylinders of the pull rod have cylindrical holes for placing the support base; the cylindrical holes have slots. The support base is a hollow cylinder with a skirt at one end for connecting to the front housing and a through hole at the other end for the steel ball to pass through. One end of the magnetic circuit is located inside the hollow cylinder of the support base and has a recessed steel ball groove; the other end is located at the bottom of the rear housing. This utility model effectively achieves unlocking and release of the mechanism, with stable force, high safety and reliability, and reusability.

Description

Technical Field

[0001] This utility model belongs to the field of aerospace materials and manufacturing, and specifically relates to a spring-type electromagnetic rotary unlocking mechanism. Background Technology

[0002] In the aerospace field, there is a need to unlock and release structures or components in the air, as well as UAV blades. Traditionally, pyrotechnics and thermal fuses are used for unlocking and release. However, pyrotechnics are controlled by gunpowder, requiring strict control of the amount of gunpowder used, and the detonation time is difficult to control, posing safety hazards. Thermal fuses require high energy consumption and operate at high temperatures, also posing certain safety risks. A spring-loaded electromagnetic rotary unlocking mechanism can be used to replace pyrotechnics and thermal fuses, offering advantages such as safety, reliability, and fast response time.

[0003] The patent search query "(electromagnetic + rotation + unlocking mechanism)" yielded two patent results, including two patent applications related to this utility model:

[0004] 1) Patent document CN102420372A discloses a secondary unlocking and separation mechanism for an electrical connector. It relies on the movement of a pull rod along its axis to make steel balls fall into different conical segments provided on the pull rod to achieve unlocking. However, it cannot guarantee higher space utilization and cannot achieve remote control unlocking.

[0005] 2) Patent document CN205425962U discloses a steel ball rotating locking mechanism for firearm connection. This mechanism requires manually placing the suppressor onto the muzzle, rotating the inclined surface of the locking sleeve to compress the steel ball, and then fixing it in place. After the locking sleeve rotates to its final position, the positioning head is positioned within the limiting hole of the connecting seat. Disassembly requires rotating the locking sleeve in the opposite direction and manually pulling out the suppressor.

[0006] Therefore, there is an urgent need for an unlocking mechanism that can ensure higher space utilization and enable remote control automatic unlocking. Summary of the Invention

[0007] To solve the above problems, this utility model provides a spring-type electromagnetic rotary unlocking mechanism, the specific technical solution of which is as follows:

[0008] A spring-type electromagnetic rotary unlocking mechanism includes a front housing, a spring, a pull rod, a steel ball, a support base, a magnetic circuit, a rear housing, a wire pressing component, and a drive mechanism interface;

[0009] The front housing has a hole at one end for the pull rod to pass through, and the other end presses against the support base and connects to one end of the rear housing; the connection method is a threaded connection; the other end of the rear housing is provided with a wire-fixing plug; the wire-pressing component is used to press the wire-fixing plug tightly;

[0010] The pull rod is arranged with a first-stage cylinder, a second-stage cylinder, and a third-stage cylinder in ascending order of diameter; the first-stage cylinder passes through a hole in the front housing; the second-stage cylinder is surrounded by a spring; and the third-stage cylinder provides an end face for spring compression.

[0011] The second and third cylindrical sections of the pull rod are provided with cylindrical holes for placing the support base; the inner ring of the cylindrical hole is provided with a groove for cooperating with the steel ball to complete the limit of the pull rod.

[0012] The support base is a hollow cylinder with a skirt at one end for connecting to the front housing and a through hole at the other end for steel balls to pass through; the through hole corresponds to the slot.

[0013] One end of the magnetic circuit is located inside the hollow cylinder of the support base and is provided with a concave steel ball groove, while the other end is located at the bottom of the rear housing; the concave steel ball groove and the through hole of the support base provide conditions for the steel ball to extend and retract within the through hole of the support base.

[0014] The drive mechanism interface is used to connect the drive mechanism.

[0015] Furthermore, the magnetic circuit includes a rotor, a limiting plate, a magnetic guide frame, and a winding seat;

[0016] The rotor includes a rotor front cover, a permanent magnet, and a rotor rear cover; the rotor front cover includes a support component and a cavity component; the support component is disposed inside a hollow cylinder of a support base; the cavity component is combined with one end of the rotor rear cover to form a cavity; a permanent magnet is disposed inside the cavity;

[0017] The limiting plate is disposed on the other end face of the rotor rear cover outside the cavity, and is used to limit the axial movement of the rotor;

[0018] The winding base is used to wind the wire and also serves as insulation;

[0019] The magnetic guide frame is located inside the rear housing and is pressed tightly against the end face of the support base. When the wires on the winding base are energized, they are magnetized, causing the permanent magnet to change its state and drive the rotor to rotate.

[0020] Furthermore, the outer layer of the second-order cylinder is fitted with the spring with a clearance to reduce the spring's extension and contraction friction.

[0021] Furthermore, the wire pressing component is a wire pressing cap; the wire pressing cap is threadedly engaged with the rear housing to press and secure the wire plug.

[0022] Furthermore, the support base has four through holes, four recessed steel ball grooves, four slots for the pull rod, and four steel balls, all corresponding one-to-one. Specifically: in the locked state, the steel ball protrudes from the outer ring of the through hole and engages with the slot, locking the pull rod from radial movement; in the unlocked state, when the rotor rotates, the recessed steel ball groove aligns with the through hole, the steel ball passes through the through hole and falls into the recessed steel ball groove, releasing the pull rod's slot. After the pull rod slot loses the steel ball's restraint, it unlocks under the spring's thrust.

[0023] Furthermore, the permanent magnet includes a locked state and an unlocked state; in the locked state, the permanent magnet rotates to one angle and the lever is locked; in the unlocked state, the permanent magnet rotates to another angle and the lever is unlocked.

[0024] Furthermore, a limiting rod groove is excavated in the axial direction outside the cavity; the magnetic circuit also includes a limiting rod, which is set in the limiting rod groove to limit the rotation angle of the rotor; the angle is set according to the locked and unlocked states of the permanent magnet.

[0025] Furthermore, there are two limiting rod slots, which are symmetrically distributed; there are two limiting rods, each corresponding to one of the two limiting rod slots.

[0026] Furthermore, the inner ring of the first cylindrical section of the pull rod is provided with a threaded hole, which is used to pull the pull rod back to the locked state after unlocking.

[0027] The principle behind this embodiment:

[0028] The entire magnetic circuit exhibits polarity, with S and N poles at both ends. It interacts with the magnetic field of the permanent magnet, causing the permanent magnet to generate a counter-clockwise torque, driving the rotor to rotate counter-clockwise. When the rotor reaches a designated position, it is stopped by a limit rod. After power is cut off, the magnetomotive force provided by the permanent magnet maintains that position. Conversely, when a reverse current flows through the coil winding, the magnetic core in the magnetic circuit is magnetized, and the entire magnetic circuit exhibits polarity, with N and S poles at both ends. It interacts with the magnetic field of the permanent magnet, causing the permanent magnet to generate a clockwise torque, driving the rotor to rotate clockwise. When it reaches a designated position, it is stopped by a limit rod. After power is cut off, the magnetomotive force provided by the permanent magnet maintains that position.

[0029] When the mechanism is in the locked state, the steel ball protrudes from the outer ring of the through hole and engages with the slot, preventing the locking rod from moving radially. When the wire on the winding seat is energized, the magnetic skeleton is magnetized, and the internal rotor rotates with the permanent magnet. The rotor's stable state changes from the locked state to the unlocked state (only requiring overcoming a certain amount of friction), causing the steel ball to fall through the through hole into the inner steel ball slot of the rotor. The axial limiting function of the steel ball disappears, the spring compression force is released, and the rod moves axially to the unlocked state, thus realizing the function.

[0030] Compared with the prior art, the beneficial effects achieved by this utility model are as follows:

[0031] (1) This utility model can effectively unlock and release the mechanism, and the process thread left at the end of the pull rod can reset the spring, and the product can be reused.

[0032] (2) This utility model can complete the unlocking task by cooperating with the slot and the steel ball, and can also restrict the rotation of the rotor. At the same time, the limit rod and the limit plate further strengthen the rotation restriction of the rotor, and the force is stable, safe and reliable. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of the spring-type electromagnetic rotary unlocking mechanism in the locked state.

[0035] Figure 2 This is a schematic diagram of the unlocked state of the spring-type electromagnetic rotary unlocking mechanism.

[0036] Figure 3 This is a schematic diagram of the locking state of a spring-type electromagnetic rotary unlocking mechanism.

[0037] Figure 4 This is a schematic diagram of the unlocking state of a spring-type electromagnetic rotary unlocking mechanism.

[0038] Explanation of reference numerals in the attached figures:

[0039] 1 is the front housing; 2 is the spring; 3 is the pull rod; 4 is the steel ball; 5 is the support base; 6 is the rotor front cover; 7 is the permanent magnet; 8 is the rotor rear cover; 9 is the limiting rod; 10 is the limiting plate; 11 is the magnetic guide frame; 12 is the winding seat; 13 is the rear housing; 14 is the wire fixing plug; 15 is the wire pressing cap; 16 is the drive mechanism interface. Detailed Implementation

[0040] The following specific examples illustrate the implementation of the utility model. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

[0041] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show the components related to the present invention and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0042] The following is in conjunction with the appendix Figures 1-4 The present invention will be further described in detail below:

[0043] A spring-loaded electromagnetic rotary unlocking mechanism, such as Figure 1 and Figure 2 As shown, it includes a front housing 1, a spring 2, a pull rod 3, a steel ball 4, a support base 5, a magnetic circuit, a rear housing 13, a wire pressing component, and a drive mechanism interface 16;

[0044] The front housing 1 has a hole at one end for the pull rod 3 to pass through, and the other end presses against the support base 5 and is connected to one end of the rear housing 13; the connection method is a threaded connection; the other end of the rear housing 13 is provided with a wire fixing plug 14; the wire pressing component is used to press the wire fixing plug 14.

[0045] The pull rod 3 is arranged with a first-stage cylinder, a second-stage cylinder, and a third-stage cylinder in order of increasing diameter; the first-stage cylinder passes through a hole on the front housing 1; the second-stage cylinder is surrounded by a spring 2; and the third-stage cylinder is used to provide an end face for the compression of the spring 2.

[0046] The second and third cylindrical sections of the pull rod 3 are provided with cylindrical holes for placing the support base 5; the inner ring of the cylindrical hole is provided with a groove for cooperating with the steel ball 4 to complete the limiting of the pull rod 3;

[0047] The support base 5 is a hollow cylinder with a skirt at one end for connecting to the front housing 1, and a through hole at the other end for the steel ball 4 to pass through; the through hole corresponds to the slot.

[0048] One end of the magnetic circuit is located inside the hollow cylinder of the support base 5 and is provided with a concave steel ball groove, while the other end is located at the bottom of the rear housing 13. The concave steel ball groove cooperates with the through hole of the support base 5 to provide conditions for the steel ball 4 to extend and retract within the through hole of the support base 5.

[0049] The drive mechanism interface 16 is used to connect the drive mechanism.

[0050] like Figure 1 and Figure 2 As shown, the magnetic circuit includes a rotor, a limiting plate 10, a magnetic guide frame 11, and a winding seat 12.

[0051] The rotor includes a rotor front cover 6, a permanent magnet 7, and a rotor rear cover 8; the rotor front cover 6 contains a support component and a cavity component; the support component is disposed inside the hollow cylinder of the support base 5; the cavity component is combined with one end of the rotor rear cover 8 to form a cavity; the permanent magnet 7 is disposed inside the cavity;

[0052] The limiting plate 10 is disposed on the other end face of the rotor rear cover 8 outside the cavity, and is used to limit the axial movement of the rotor.

[0053] The winding seat 12 is used to wind the wire and also serves as insulation;

[0054] The magnetic guide frame 11 is located inside the rear housing 13 and is pressed tightly against the end face of the support base 5. When the wires on the winding base 12 are energized, they are magnetized, causing the permanent magnet 7 to change state and drive the rotor to rotate.

[0055] The outer layer of the second-order cylinder is fitted with spring 2 with a clearance to reduce the frictional force of spring 2 during extension and contraction.

[0056] The wire pressing component is a wire pressing cap 15; the wire pressing cap 15 is threadedly engaged with the rear housing 13 to press and secure the wire plug 14.

[0057] like Figure 3 and Figure 4 As shown, the support base 5 has four through holes, four recessed steel ball grooves, four slots for the pull rod 3, and four steel balls, all corresponding one-to-one. Specifically: in the locked state, the steel ball 4 protrudes from the outer ring of the through hole and engages with the slot, locking the pull rod 3 from radial movement; in the unlocked state, when the rotor rotates, and the recessed steel ball groove aligns with the through hole, the steel ball 4 passes through the through hole and falls into the recessed steel ball groove, releasing the slot of the pull rod 3. After the slot of the pull rod 3 loses the restraint of the steel ball 4, it unlocks under the thrust of the spring 2.

[0058] like Figure 3 and Figure 4 As shown, the permanent magnet 7 has a locked state and an unlocked state; in the locked state, the permanent magnet 7 rotates to one angle and the lever 3 is locked; in the unlocked state, the permanent magnet 7 rotates to another angle and the lever 3 is unlocked.

[0059] like Figure 1 and Figure 2 As shown, a limiting rod groove is excavated in the axial direction outside the cavity; the magnetic circuit also includes a limiting rod 9, which is set in the limiting rod groove to limit the rotation angle of the rotor; the angle is designed according to the locked and unlocked states of the permanent magnet 7.

[0060] There are two limiting rod slots, which are symmetrically distributed; there are two limiting rods 9, which correspond to the two limiting rod slots respectively.

[0061] The inner ring of the first cylindrical section of the pull rod 3 is provided with a threaded hole, which is used to pull the pull rod 3 back to the locked state after unlocking.

[0062] The principle behind this embodiment:

[0063] like Figure 3 and Figure 4 As shown, the entire magnetic circuit exhibits polarity, with S and N poles at both ends, and interacts with the magnetic field of permanent magnet 7, causing permanent magnet 7 to generate a counterclockwise torque, driving the rotor to rotate counterclockwise. When the rotor rotates to the designated position, it is limited by the limiting rod 9. After the power is cut off, the magnetomotive force provided by permanent magnet 7 maintains this position. Conversely, when a reverse current flows through the coil winding, the magnetic guide frame 11 in the magnetic circuit is magnetized, and the entire magnetic circuit exhibits polarity, with N and S poles at both ends, and interacts with the magnetic field of permanent magnet 7, causing permanent magnet 7 to generate a clockwise torque, driving the rotor to rotate clockwise. When it rotates to the designated position, it is limited by the limiting rod 9. After the power is cut off, the magnetomotive force provided by permanent magnet 7 maintains this position.

[0064] When the mechanism is in the locked state, the steel ball 4 protrudes from the outer ring of the through hole and engages with the slot, preventing the locking rod 3 from moving radially. When the wire on the winding seat 12 is energized, the magnetic skeleton 11 is magnetized, and the internal rotor rotates with the permanent magnet 7. The rotor's stable state changes from the locked state to the unlocked state (only needing to overcome a certain frictional force), causing the steel ball 4 to fall through the through hole into the inner concave steel ball slot of the rotor. The axial limiting function of the steel ball 4 disappears, the compression force of the spring 2 is released, and the rod 3 moves axially to the unlocked state, thus realizing the function.

[0065] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make possible changes and modifications to the technical solution of the present invention based on the above disclosure without departing from the spirit and scope of the present invention. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the protection scope of the technical solution of the present invention.

Claims

1. A spring-type electromagnetic rotary unlocking mechanism, characterized in that, It includes a front housing (1), a spring (2), a pull rod (3), a steel ball (4), a support base (5), a magnetic circuit, a rear housing (13), a wire pressing component, and a drive mechanism interface (16); The front housing (1) has a hole at one end for the pull rod (3) to pass through, and the other end presses against the support base (5) and is connected to one end of the rear housing (13); the other end of the rear housing (13) is provided with a wire fixing plug (14); the wire pressing component is used to press the wire fixing plug (14); The pull rod (3) is provided with a first-stage cylinder, a second-stage cylinder, and a third-stage cylinder in order of increasing diameter; the first-stage cylinder passes through a hole on the front housing (1); the second-stage cylinder is surrounded by a spring (2); the third-stage cylinder is used to provide an end face for the compression of the spring (2); The second and third cylindrical sections of the pull rod (3) are provided with cylindrical holes for placing the support base (5); the inner ring of the cylindrical hole is provided with a slot for cooperating with the steel ball (4) to complete the limit of the pull rod (3); The support base (5) is a hollow cylinder with a skirt at one end for connecting the front housing (1) and a through hole at the other end for the steel ball (4) to pass through; the through hole corresponds to the slot. One end of the magnetic circuit is located inside the hollow cylinder of the support base (5) and is provided with a concave steel ball groove, while the other end is located at the bottom of the rear shell (13). The drive mechanism interface (16) is used to connect the drive mechanism.

2. The spring-type electromagnetic rotary unlocking mechanism as described in claim 1, characterized in that, The magnetic circuit includes a rotor, a limiting plate (10), a magnetic guide frame (11), and a winding seat (12); The rotor includes a rotor front cover (6), a permanent magnet (7), and a rotor rear cover (8); The rotor front cover (6) includes a support component and a cavity component; the support component is disposed inside the hollow cylinder of the support base (5); the cavity component is combined with one end of the rotor rear cover (8) to form a cavity; A permanent magnet (7) is installed inside the cavity; The limiting plate (10) is disposed on the other end face of the rotor rear cover (8) outside the cavity, and is used to limit the axial movement of the rotor; The winding seat (12) is used to wind the wire and also serves as insulation; The magnetic guide frame (11) is located inside the rear housing (13) and is pressed against the end face of the support base (5). When the wire on the winding base (12) is energized, it is magnetized, causing the permanent magnet (7) to change state and drive the rotor to rotate.

3. The spring-type electromagnetic rotary unlocking mechanism as described in claim 1, characterized in that, The second cylindrical outer layer of the pull rod (3) is fitted with the spring (2) with a clearance to reduce the stretching friction of the spring (2).

4. The spring-type electromagnetic rotary unlocking mechanism as described in claim 1, characterized in that, The wire pressing component is a wire pressing cap (15); the wire pressing cap (15) cooperates with the rear housing (13) to press and tighten the wire plug (14).

5. The spring-type electromagnetic rotary unlocking mechanism as described in claim 1, characterized in that, The support base (5) has four through holes, four recessed steel ball grooves, four slots for the pull rod (3), and four steel balls, which correspond one-to-one.

6. The spring-type electromagnetic rotary unlocking mechanism as described in claim 2, characterized in that, The permanent magnet (7) has a locked state and an unlocked state.

7. The spring-type electromagnetic rotary unlocking mechanism as described in claim 2, characterized in that, The cavity is provided with a limiting rod groove in the outer axial direction; the magnetic circuit also includes a limiting rod (9), which is set in the limiting rod groove to limit the rotation angle of the rotor; the angle is set according to the locking and unlocking states of the permanent magnet (7).

8. The spring-type electromagnetic rotary unlocking mechanism as described in claim 7, characterized in that, There are two limiting rod slots, which are symmetrically distributed; there are two limiting rods (9), which correspond to the two limiting rod slots respectively.

9. A spring-type electromagnetic rotary unlocking mechanism as described in claim 1, characterized in that, The first cylindrical inner ring of the pull rod (3) is provided with a threaded hole, which is used to pull the pull rod (3) back to the locked state after unlocking.

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