Axial positioning and locking device for permanent magnets of high-retentivity flux transformer
Patent Information
- Application Number
- CN202521981292.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-15
- Publication Date
- 2026-10-09
- Estimated Expiration
- 2035-09-15
AI Technical Summary
[0004]本实用新型的目的在于提供高保持力磁通变换器的永磁体轴向定位锁紧装置，解决了背景技术中现有的磁通变换器的永磁体在安装过程中，不便于进行快速定位锁紧，且定位锁紧完成后，随着时间的使用，其定位锁紧的保持力会逐渐降低，从而导致其发生偏移，进而影响磁通变换器正常工作的问题
1、通过壳盖、定位螺杆、安装腔、限位槽、第一铁芯、第二铁芯、定位块、滑动块、永磁体本体、加固块、安装框、固定孔、安装槽、安装螺杆和定位槽的结构设计，可以实现便于对永磁体本体进行定位锁紧，操作简单，定位锁紧效率高，同时在永磁体本体定位锁紧后，能够通过多个定位块和定位槽的相互配合，以及多个限位槽和滑动块的相互配合，可以对永磁体本体进行限位避免其转动，从而保证磁通变换器的正常工作。
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Figure CN224841758U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of positioning and locking devices, specifically to an axial positioning and locking device for the permanent magnet of a high holding force flux converter. Background Technology
[0002] As a key actuator in the intelligent trip unit of low-voltage circuit breakers, the flux converter adopts an energy storage structure of "permanent magnet holding + pulse demagnetization release," featuring small size, low power consumption, fast action, and high reliability. Under normal conditions, the permanent magnet attracts the moving iron core, and the spring stores energy under pressure. During tripping, the capacitor discharges to the coil to cancel the permanent magnet flux, causing the moving iron core to pop out and push the circuit breaker open. Resetting requires manual or mechanical re-tightening. Core components include neodymium iron boron permanent magnets and electromagnetic coils. The design needs to optimize parameters such as the number of coil turns and the size of the permanent magnet under given power consumption and size to balance sensitivity and anti-interference. Performance is verified through three-dimensional coupling modeling and experiments. The typical trigger energy is in the mJ range and the action time is in the ms range. It is mainly used in scenarios such as intelligent trip units of low-voltage circuit breakers. In engineering, attention should be paid to anti-interference, shock resistance, and long-term stability. The selection and design should first clarify the requirements, then initially select parameters, and verify and optimize them.
[0003] This application improves upon the existing technology, in which the permanent magnet of the existing flux converter is not easy to be quickly positioned and locked during installation, and after positioning and locking, the holding force of the positioning and locking will gradually decrease with the use of time, which will cause it to shift and thus affect the normal operation of the flux converter. Utility Model Content
[0004] The purpose of this invention is to provide an axial positioning and locking device for the permanent magnet of a high-holding-force flux converter. This solves the problem in the prior art that the permanent magnet of the existing flux converter is not easy to be quickly positioned and locked during installation, and that after positioning and locking, the holding force of the positioning and locking will gradually decrease over time, causing it to shift and thus affecting the normal operation of the flux converter.
[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: A permanent magnet axial positioning and locking device for a high-holding-force flux converter includes a housing with a mounting cavity extending from its upper surface. Multiple limiting grooves are arranged in a circular array on the inner wall of the mounting cavity. A positioning and locking assembly is disposed inside the mounting cavity. The positioning and locking assembly includes a mounting frame disposed at the bottom of the mounting cavity. Multiple reinforcing blocks are arranged in a circular array on the outer wall of the mounting frame. A mounting groove is extended from the upper surface of the mounting frame, and multiple limiting grooves are arranged in a circular array on the inner wall of the mounting groove. The positioning groove has a positioning block inside it, and a permanent magnet body is fixedly connected between two adjacent positioning blocks. A second iron core is provided on the outer wall of the reinforcing block, and the reinforcing block is located inside the second iron core. A first iron core is provided on the top of the second iron core. Multiple sliding blocks are fixedly provided on the outer walls of both the first and second iron cores, and one end of the sliding block is movably disposed inside the limiting groove. Multiple fixing holes are provided through the surface of the first and second iron cores in a circular array. A positioning screw is installed in the internal thread of the fixing hole.
[0006] Preferably, a plurality of connecting blocks are fixedly connected in a ring array on the outer side wall of the housing, and the number of connecting blocks is four, with the upper surface of the connecting blocks extending into the interior and having a slot.
[0007] Preferably, a card block is movably disposed inside the card slot, and a screw hole is formed on the outer wall of the card block.
[0008] Preferably, the inner wall of the screw hole is threaded with a mounting screw, and the top of the locking block is fixedly connected to a fixing block.
[0009] Preferably, a cover is fixedly connected between two adjacent fixing blocks, and a round hole is provided at the center of the top of the cover.
[0010] Preferably, the number of limiting grooves is four, the number of positioning blocks is eight, the number of reinforcing blocks is four, and the number of positioning grooves is eight.
[0011] Compared with the prior art, the beneficial effects achieved by this utility model are: 1. Through the structural design of the shell cover, positioning screw, mounting cavity, limiting groove, first iron core, second iron core, positioning block, sliding block, permanent magnet body, reinforcing block, mounting frame, fixing hole, mounting groove, mounting screw and positioning groove, it is possible to easily position and lock the permanent magnet body. The operation is simple and the positioning and locking efficiency is high. At the same time, after the permanent magnet body is positioned and locked, the permanent magnet body can be limited to prevent its rotation by the cooperation of multiple positioning blocks and positioning grooves, as well as the cooperation of multiple limiting grooves and sliding blocks, thereby ensuring the normal operation of the flux converter.
[0012] 2. The structural design of the housing, cover, fixing block, connecting block, screw hole, slot and block allows for easy disassembly and assembly of the housing and cover, making it easier to maintain the flux converter and thus improving maintenance efficiency. Attached Figure Description
[0013] Figure 1 This is a partial three-dimensional schematic diagram of the overall structure of this utility model; Figure 2 This is a partial structural diagram of the present invention viewed from below; Figure 3 This is a partial structural diagram of the positioning screw, which is the main feature of this utility model. Figure 4 This is a partial structural diagram of the positioning block, which is the main feature of this utility model. Figure 5 This is a partial structural diagram of the mounting groove, which is the main feature of this utility model.
[0014] The components are: 1. Shell; 2. Shell cover; 3. Fixing block; 4. Connecting block; 5. Screw hole; 6. Positioning screw; 7. Slot; 8. Round hole; 9. Locking block; 10. Mounting cavity; 11. Limiting groove; 12. First iron core; 13. Second iron core; 14. Positioning block; 15. Sliding block; 16. Permanent magnet body; 17. Reinforcing block; 18. Mounting frame; 19. Fixing hole; 20. Mounting groove; 21. Mounting screw; 22. Positioning groove. Detailed Implementation
[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0016] Please see Figure 1-5 A permanent magnet axial positioning and locking device for a high holding force flux converter includes a housing 1. The upper surface of the housing 1 extends into the interior and has an installation cavity 10. Multiple limiting grooves 11 are arranged in a ring array on the inner sidewall of the installation cavity 10. The positioning and locking assembly is disposed inside the mounting cavity 10. The positioning and locking assembly includes a mounting frame 18 disposed at the bottom of the mounting cavity 10. Multiple reinforcing blocks 17 are arranged in a circular array on the outer wall of the mounting frame 18. The upper surface of the mounting frame 18 extends into the interior and is provided with a mounting groove 20. Multiple positioning grooves 22 are arranged in a circular array on the inner side wall of the mounting groove 20. The number of limiting grooves 11 is four, the number of positioning blocks 14 is eight, the number of reinforcing blocks 17 is four, and the number of positioning grooves 22 is eight. A positioning block 14 is fitted inside the positioning groove 22. A permanent magnet body 16 is fixedly connected between two adjacent positioning blocks 14. A second iron core 13 is provided on the outer wall of the reinforcing block 17, and the reinforcing block 17 is located inside the second iron core 13. A first iron core 12 is provided on the top of the second iron core 13. Multiple sliding blocks 15 are fixedly provided on the outer walls of both the first iron core 12 and the second iron core 13. One end of the sliding block 15 is movably provided inside the limiting groove 11. Multiple fixing holes 19 are provided through the surface of the first iron core 12 and the second iron core 13 in a ring array. A positioning screw 6 is installed inside the fixing hole 19. Specifically, such as Figure 1 , Figure 3 , Figure 4 and Figure 5 As shown, during use, when it is necessary to position and install the permanent magnet body 16, first place the mounting frame 18 into the center of the mounting cavity 10, then align the positioning block 14 on the permanent magnet body 16 with the positioning groove 22, then move the permanent magnet body 16 downwards until the bottom end of the permanent magnet body 16 is inserted into the mounting groove 20, then align the sliding block 15 on the first iron core 12 and the second iron core 13 with the limiting groove 11, and move the first iron core 12 downwards until the first iron core 12 and the second iron core 13 are completely inserted into the mounting cavity 10, then screw the multiple positioning screws 6 into the corresponding fixing holes 1. Within 9, the first iron core 12 and the second iron core 13 are fixed, thereby completing the positioning and locking of the permanent magnet body 16. Then, multiple reinforcing blocks 17 are inserted into the matching gaps to fix the mounting frame 18, thereby improving the stability after installation. The operation is simple and the positioning and locking efficiency is high. At the same time, after the permanent magnet body 16 is positioned and locked, the permanent magnet body 16 can be limited to prevent its rotation through the mutual cooperation of multiple positioning blocks 14 and positioning grooves 22, as well as the mutual cooperation of multiple limiting grooves 11 and sliding blocks 15, thus ensuring the normal operation of the flux converter.
[0017] Multiple connecting blocks 4 are fixedly connected in a ring array on the outer side wall of the shell 1, and there are four connecting blocks 4. The upper surface of the connecting block 4 extends into the interior and has a slot 7. A locking block 9 is movably arranged inside the slot 7. A screw hole 5 is opened on the outer wall of the locking block 9. An installation screw 21 is threaded on the inner wall of the screw hole 5. A fixing block 3 is fixedly connected to the top of the locking block 9. A shell cover 2 is fixedly connected between two adjacent fixing blocks 3. A round hole 8 is opened at the center of the top of the shell cover 2. Specifically, such as Figure 1 , Figure 2 and Figure 3 As shown, when it is necessary to assemble the housing 1 and the cover 2, insert the locking block 9 on the housing 1 into the corresponding locking slot 7, and then screw the mounting screw 21 into the matching screw hole 5 to fix the locking block 9, thereby completing the assembly of the housing 1 and the cover 2. Similarly, the housing 1 and the cover 2 can be disassembled. By making it easier to disassemble and assemble the housing 1 and the cover 2, it is easier to repair the flux converter, thereby improving the efficiency of repair.
[0018] Working principle: In this application, when the permanent magnet body 16 needs to be positioned and installed, firstly, the mounting frame 18 is placed in the center of the mounting cavity 10. Then, the positioning block 14 on the permanent magnet body 16 is aligned with the positioning groove 22. Next, the permanent magnet body 16 is moved downwards until the bottom end of the permanent magnet body 16 is inserted into the mounting groove 20. Then, the sliding block 15 on the first iron core 12 and the second iron core 13 is aligned with the limiting groove 11, and the first iron core 12 is moved downwards until the first iron core 12 and the second iron core 13 are completely inserted into the mounting cavity 10. Then, multiple positioning screws 6 are screwed into the matching fixing holes 19 to fix the first iron core 12 and the second iron core 13. After the permanent magnet body 16 is positioned and locked, multiple reinforcing blocks 17 are inserted into the corresponding gaps to fix the mounting frame 18, thereby improving the stability after installation. The operation is simple and the positioning and locking efficiency is high. Secondly, when it is necessary to assemble the housing 1 and the cover 2, the locking block 9 on the housing 1 is inserted into the corresponding slot 7, and then the mounting screw 21 is screwed into the corresponding screw hole 5 to fix the locking block 9, thereby completing the assembly of the housing 1 and the cover 2. Similarly, the housing 1 and the cover 2 can be disassembled. By facilitating the disassembly and assembly of the housing 1 and the cover 2, it is easier to inspect the flux converter, thereby improving the efficiency of inspection.
[0019] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit, the scope of which is defined by the appended claims and their equivalents.
Claims
1. An axial positioning and locking device for the permanent magnet of a high-holding-force flux converter, characterized in that, include: The housing (1) has an installation cavity (10) extending from its upper surface to its interior. Multiple limiting grooves (11) are arranged in a ring array on the inner sidewall of the installation cavity (10). The positioning and locking assembly is disposed inside the mounting cavity (10). The positioning and locking assembly includes a mounting frame (18) disposed at the bottom of the mounting cavity (10). Multiple reinforcing blocks (17) are arranged in a ring array on the outer wall of the mounting frame (18). The upper surface of the mounting frame (18) extends into the interior and is provided with a mounting groove (20). Multiple positioning grooves (22) are arranged in a ring array on the inner side wall of the mounting groove (20). The positioning groove (22) is fitted with a positioning block (14), and a permanent magnet body (16) is fixedly connected between two adjacent positioning blocks (14). A second iron core (13) is provided on the outer wall of the reinforcing block (17), and the reinforcing block (17) is located inside the second iron core (13). A first iron core (12) is provided on the top of the second iron core (13). Multiple sliding blocks (15) are fixedly provided on the outer walls of both the first iron core (12) and the second iron core (13), and one end of the sliding block (15) is movably provided inside the limiting groove (11). Multiple fixing holes (19) are provided through the surface of the first iron core (12) and the second iron core (13) in a ring array. A positioning screw (6) is installed in the internal thread of the fixing hole (19).
2. The permanent magnet axial positioning and locking device for a high-holding-force flux converter according to claim 1, characterized in that: The outer wall of the housing (1) is fixedly connected in a ring array with a number of connecting blocks (4), and the number of connecting blocks (4) is four. The upper surface of the connecting blocks (4) extends into the interior and is provided with a slot (7).
3. The permanent magnet axial positioning and locking device for a high-holding-force flux converter according to claim 2, characterized in that: The slot (7) is equipped with a movable block (9), and the outer wall of the block (9) is provided with a screw hole (5).
4. The permanent magnet axial positioning and locking device for a high-holding-force flux converter according to claim 3, characterized in that: The inner wall of the screw hole (5) is threaded with an installation screw (21), and the top of the locking block (9) is fixedly connected with a fixing block (3).
5. The permanent magnet axial positioning and locking device for a high-holding-force flux converter according to claim 4, characterized in that: A cover (2) is fixedly connected between two adjacent fixed blocks (3), and a round hole (8) is provided at the center of the top of the cover (2).
6. The permanent magnet axial positioning and locking device for a high-holding-force flux converter according to claim 1, characterized in that: The number of limiting grooves (11) is four, the number of positioning blocks (14) is eight, the number of reinforcing blocks (17) is four, and the number of positioning grooves (22) is eight.