Magnetic flux converter with protection function and convenient to assemble

Abstract

The utility model discloses a magnetic flux converter with a protection function and convenient to assemble, the magnetic flux converter comprises an electromagnetic mechanism, a movable iron core and a push rod, the electromagnetic mechanism is detachably connected and fixed with the push rod, the push rod is provided with a protection shell and is arranged on the outer wall of the electromagnetic mechanism, and the movable iron core is arranged on the outer wall of the protection shell. The protective shell is provided with an opening surface and a reset surface, and the reset surface is used for enabling the electromagnetic mechanism to be reset and attracted; and the opening surface is used for tripping the circuit breaker. According to the utility model, the push rod and the electromagnetic mechanism can be connected or detached conveniently through a detachable mode, the assembly time is greatly reduced, the assembly efficiency is improved, the electromagnetic mechanism is protected from being influenced by electric arcs through the protective shell, and the electromagnetic mechanism can be applied to a circuit breaker with a small space or a switch with a switch-on and switch-off function through the reset surface and the switch-on surface. Therefore, the product has a protection function, and the assembly efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of low-voltage electrical appliances, in particular to a magnetic flux converter with a protection function and convenient for assembly. Background Art

[0002] With the rapid and extensive application of electronic technology in the field of low-voltage electrical appliances, intelligent circuit breakers are new types of circuit breakers born in response to market demands. Their protection functions are intelligent and their volumes are miniaturized, which is the mainstream direction for the development of circuit breakers in the future. The magnetic flux converter is a key actuating element of an intelligent circuit breaker. It is well known that it mainly includes a permanent magnet, an electromagnetic coil, a moving iron core and a spring. In normal conditions, the moving iron core is held in the attracted position under the suction force of the permanent magnet. When situations such as overload or short circuit occur, the current signal of overload or short circuit will be sent by the mutual inductor to the electronic release. Subsequently, the CPU of the electronic release sends an electronic pulse signal to the magnetic flux converter, making the electromagnetic coil energized and generating a magnetic flux opposite to the magnetic flux generated by the permanent magnet in the yoke, thereby greatly reducing the suction force of the permanent magnet on the moving iron core. At this time, since the elastic force of the spring is greater than the suction force of the permanent magnet on the moving iron core, the moving iron core is released and pops out, and drives the actuating mechanism of the circuit breaker to disconnect the circuit.

[0003] The assembly of the moving iron core and the push rod of the existing magnetic flux converter is cumbersome and the assembly efficiency is low, resulting in an increase in manufacturing costs. Moreover, the spring between the push rod and the yoke cover is directly exposed outside. When the circuit breaker trips, the high-temperature and glowing particles of the part not extinguished by the arc extinguishing device will directly impact the push rod, the yoke cover and the spring, resulting in a reduction in the overall service life of the magnetic flux converter. Therefore, the applicant has made a beneficial design and found a method to solve the above problems. The technical solution to be introduced below was born under this background. Summary of the Invention

[0004] The purpose of the utility model is to overcome the deficiencies of the existing design of the traditional magnetic flux converter and provide a product with a protection function and improved assembly efficiency.

[0005] To solve the above problems, the utility model adopts the following technical solutions.

[0006] A magnetic flux converter with a protection function and convenient for assembly includes an electromagnetic mechanism, a moving iron core and a push rod. The electromagnetic mechanism is detachably connected and fixed to the push rod. The push rod is provided with a protective shell and is arranged on the outer wall of the electromagnetic mechanism. The protective shell is provided with a tripping surface and a reset surface. The reset surface is used to reset and attract the electromagnetic mechanism; the tripping surface is used to trip the circuit breaker.

[0007] Preferably, the reset surface is located at the end face of the push rod. The tripping surface is perpendicular to the side surface of the electromagnetic mechanism, and an arc guiding surface is provided on the side of the tripping surface.

[0008] Preferably, the electromagnetic mechanism includes a coil bobbin, a yoke frame, a yoke cover, a static iron core, a magnet, and an iron core. The magnet, the static iron core, and the coil bobbin are sequentially placed inside the yoke frame. The coil bobbin is provided with a coil. The yoke cover abuts against the end face of the yoke frame. Clamping portions are provided on both sides of the yoke frame and are pressed against the yoke cover. The yoke cover is provided with a first limit post, and the first limit post is provided with a cavity, and a through hole is provided in the cavity.

[0009] Preferably, a counterbore is provided at the bottom of the coil bobbin, and a first through hole is provided in the counterbore. The static iron core and the magnet are arranged in the counterbore. The static iron core is provided with a convex post and is arranged in the first through hole.

[0010] Preferably, a release spring is provided between the push rod and the yoke cover. The push rod is provided with a second limit post and is sleeved on the first limit post. A guide post is provided in the second limit post and is arranged in the through hole. The guide post is provided with a second through hole and a fixing groove, and the second through hole and the fixing groove are arranged crosswise.

[0011] Preferably, the moving iron core is slidably arranged in the first through hole and the cavity. The moving iron core is provided with an extension post, and the extension post passes through the through hole. A fixing block is provided on the end face of the extension post and passes through the second through hole. Rotate the push rod to make the fixing block face the fixing groove. The release spring acts on the push rod to make the fixing block abut against the fixing groove.

[0012] Preferably, the distance between the end face of the second limit post and the yoke cover is greater than the distance between the end face of the push rod and the end face of the first limit post. The distance between the end face of the fixing block and the end face of the push rod is less than the distance between the end face of the push rod and the end face of the first limit post.

[0013] Preferably, the detachable type is a fixing block.

[0014] Preferably, a sink is provided on the end face of the push rod, and a plurality of convex bumps are provided in the sink and abut against the protective shell. The push rod and the protective shell are welded together by ultrasonic welding.

[0015] Advantageous effects:

[0016] Compared with the prior art, the advantageous effects of the present utility model are as follows:

[0017] In the present utility model, the detachable type facilitates the connection or disassembly of the push rod and the electromagnetic mechanism, greatly reducing the assembly time, improving the assembly efficiency, and reducing the production cost; the electromagnetic mechanism is protected by the protective shell from the influence of the arc, and the arc ignition surface blocks the high-temperature and glowing particles from spraying onto the coil. Through the reset surface and the closing surface, it can be applied to a circuit breaker with a small space or a switch with opening and closing functions, making the product have the advantages of a protective function and improved assembly efficiency. Description of the drawings

[0018] Figure 1 This is a schematic structural diagram of a magnetic flux converter with a protection function and easy assembly according to the present utility model;

[0019] Figure 2 This is a schematic side sectional structure diagram of a magnetic flux converter with a protection function and easy assembly according to the present utility model;

[0020] Figure 3 This is an exploded view of a sectional view of a magnetic flux converter with a protection function and easy assembly according to the present utility model Figure 1 ;

[0021] Figure 4 This is an exploded view of a sectional view of a magnetic flux converter with a protection function and easy assembly according to the present utility model Figure 2 ;

[0022] The corresponding relationship between each attached drawing label and the component name in the figure is as follows:

[0023] Reference numerals: 1, electromagnetic mechanism; 2, moving iron core; 3, push rod; 4, protective shell; 5, tripping spring;

[0024] 11, coil holder; 12, yoke iron holder; 13, yoke iron cover; 14, static iron core; 15, magnet; 16, coil;

[0025] 111, counterbore; 112, first through hole;

[0026] 121, clamping part;

[0027] 131, first limiting post; 132, cavity; 133, through hole;

[0028] 141, convex post;

[0029] 21, extension post; 22, fixing block;

[0030] 31, second limiting post; 32, guiding post; 33, second through hole; 34, fixing groove; 35, counterbore; 36, convex bump;

[0031] 41, opening surface; 42, reset surface; 43, arcing surface. Specific embodiments

[0032] Next, the technical solutions of the present utility model will be clearly and completely described in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

[0033] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0034] Reference example Figures 1 to 4 , a magnetic flux converter with a protection function and convenient for assembly, includes an electromagnetic mechanism 1, a moving iron core 2, and a push rod 3. The electromagnetic mechanism 1 is fixedly connected to the push rod 3 in a detachable manner. The push rod 3 is provided with a protective shell 4 and is arranged on the outer wall of the electromagnetic mechanism 1. The protective shell 4 is provided with a tripping surface 41 and a reset surface 42. The reset surface 42 is used to reset and attract the electromagnetic mechanism 1; the tripping surface 41 is used to trip the circuit breaker.

[0035] It is worth mentioning that the reset surface 42 is located at the end face of the push rod 3. The tripping surface 41 is perpendicular to the side surface of the electromagnetic mechanism 1. An arc guiding surface 43 is provided on the side of the tripping surface 41. The electromagnetic mechanism 1 is protected by the protective shell 4 from the influence of the arc. As shown in the attached drawings of the specification Figure 2 , the electromagnetic mechanism 1 not wrapped by the protective shell 4 is usually installed at the bottom or on the side wall of the housing and is not directly affected by the high-temperature hot particles of the arc. The reset surface 42 can abut against the reset rod of the circuit breaker or switch, and the tripping surface 41 can abut against the traction rod of the circuit breaker or the tripping rod of the switch. The arc guiding surface 43 guides the direction of the high-temperature hot particles and prevents the high-temperature hot particles from spraying onto the coil 16;

[0036] It is worth mentioning that the electromagnetic mechanism 1 includes a coil holder 11, a yoke iron holder 12, a yoke iron cover 13, a static iron core 14, a magnet 15, and an iron core. The magnet 15, the static iron core 14, and the coil holder 11 are sequentially placed inside the yoke iron holder 12. The coil holder 11 is provided with a coil 16. The yoke iron cover 13 abuts against the end face of the yoke iron holder 12. Clamping portions 121 are provided on both sides of the yoke iron holder 12 and are pressed against the yoke iron cover 13. The yoke iron cover 13 is provided with a first limiting post 131. The first limiting post 131 is provided with a cavity 132, and the cavity 132 is provided with a perforation 133. When the coil 16 is not energized, the moving iron core 2 is magnetically attracted to the static iron core 14 by the magnetism of the magnet 15, and the magnetic attraction force of the magnet 15 is greater than the elastic force of the tripping coil 16. When the coil 16 is energized, the moving iron core 2 and the static iron core 14 are magnetized, and a closed-loop magnetic flux is formed through the moving iron core 2, the static iron core 14, the yoke iron cover 13, and the yoke iron holder 12. At this time, the magnetic pole of the static iron core 14 changes, generating a magnetic pole opposite to that of the moving iron core 2, thereby generating a repulsive force on the moving iron core 2 to make the moving iron core 2 move, and then pushing the push rod 3 to move. The clamping portions 121 are squeezed by the tooling of the punching machine, so that they are squeezed against the yoke iron cover 13, thereby enabling the yoke iron cover 13 to fix the coil holder 11, the static iron core 14, and the magnet 15 on the yoke iron holder 12. The first limiting post 131 provides a guiding function for the up-and-down movement of the push rod 3, the cavity 132 provides a guiding function for the movement of the moving iron core 2, and the perforation 133 is used in cooperation with the guiding post 32;

[0037] It is worth mentioning that a counterbore 111 is provided at the bottom of the coil holder 11. The counterbore 111 is provided with a first through hole 112. The static iron core 14 and the magnet 15 are arranged in the counterbore 111. The static iron core 14 is provided with a convex post 141 and is arranged in the first through hole 112. The counterbore 111 is convenient for accommodating the static iron core 14 and the magnet 15. The first through hole 112 provides a guiding function for the movement of the moving iron core 2, and the convex post 141 limits the reset movement distance of the moving iron core 2;

[0038] It is worth mentioning that a tripping spring 5 is provided between the push rod 3 and the yoke iron cover 13. The push rod 3 is provided with a second limiting post 31 and is sleeved on the first limiting post 131. A guiding post 32 is arranged in the second limiting post 31 and is arranged in the perforation 133. The guiding post 32 is provided with a second through hole 33 and a fixing groove 34. The second through hole 33 and the fixing groove 34 are arranged in a cross manner. The tripping spring 5 plays a role in storing and releasing energy. The second limiting post 31 is used in cooperation with the yoke iron cover 13, and the guiding post 32 is used in cooperation with the second through hole 33 and the fixing groove 34;

[0039] It is worth mentioning that the moving iron core 2 is slidably arranged in the first through hole 112 and the cavity 132. The moving iron core 2 is provided with an extension column 21, which passes through the through hole 133. The end face of the extension column 21 is provided with a fixing block 22, which passes through the second through hole 33. Rotate the push rod 3 to make the fixing block 22 face the fixing groove 34. The release spring 5 acts on the push rod 3 to make the fixing block 22 abut against the fixing groove 34. The extension column 21 is used in cooperation with the fixing block 22. When the yoke iron cover 13 has not been pressed by the clamping part 121 against the end face of the yoke iron frame 12, align the fixing block 22 with the second through hole 33, apply downward pressure to the push rod 3 to make the fixing block 22 pass through the second through hole 33 and protrude from the end face of the push rod 3. Rotate the push rod 3 to make the fixing block 22 align with the entrance of the fixing groove 34. Release the force applied to the push rod 3. The release spring 5 releases elastic force to the push rod 3 to make the fixing groove 34 abut against the fixing block 22. At this time, neither left nor right rotation will cause the fixing block 22 to separate from the moving iron core 2. At the same time, it also prevents the push rod 3 from rotating around the axis of the first limiting column 131, resulting in interference between the movement of the protective shell 4 and the electromagnetic mechanism 1;

[0040] It is worth mentioning that the distance between the end face of the second limiting column 31 and the yoke iron cover 13 is greater than the distance between the end face of the push rod 3 and the end face of the first limiting column 131. The distance between the end face of the fixing block 22 and the end face of the push rod 3 is less than the distance between the end face of the push rod 3 and the end face of the first limiting column 131. Since the distance between the end face of the fixing block 22 and the end face of the push rod 3 is less than the distance between the end face of the push rod 3 and the end face of the first limiting column 131, and the distance between the end face of the push rod 3 and the end face of the first limiting column 131 is less than the distance between the end face of the second limiting column 31 and the yoke iron cover 13, after the yoke iron cover 13 and the yoke iron frame 12 are fixedly connected, the moving iron core 2 will not be able to separate from the connection with the push rod 3, thus ensuring the fixed connection between the moving iron core 2 and the push rod 3;

[0041] It is worth mentioning that the detachable type is the fixing block 22. After removing the clamping part 121 pressed on the yoke iron frame 12, the moving iron core 2 can be separated from the connection with the push rod 3, thereby improving the resource recovery rate;

[0042] It is worth mentioning that the end face of the push rod 3 is provided with a sunk groove 35. The sunk groove 35 is provided with a number of convex bumps 36 and abuts against the protective shell 4. The push rod 3 and the protective shell 4 are welded together by ultrasonic waves. The ultrasonic waves transmit ultrasonic energy into the sunk groove 35 of the push rod 3 and the protective shell 4. Due to the large acoustic resistance between the push rod 3 and the protective shell 4 through the multiple convex bumps 36, local high temperature is quickly generated between the convex bumps 36 and the protective shell 4. Also, because the plastic has poor thermal conductivity, heat cannot be dissipated in time for a while and accumulates in the sunk groove 35, causing the convex bumps 36 to quickly melt. With a certain pressure applied, the two are fused into one. When the ultrasonic waves stop acting, the pressure is maintained and there is a certain holding pressure time to make it solidify and form a shape. In this way, a strong molecular chain is formed to achieve the purpose of welding, and the welding strength can be close to the strength of the raw material body.

[0043] Through the above design scheme, the product can achieve the advantages of having a protective function and improving the assembly efficiency.

[0044] The above content further elaborates on the present utility model in combination with specific implementation manners. It cannot be determined that the specific implementation of the present utility model is only limited to these descriptions. For those of ordinary skill in the technical field to which the present utility model pertains, without departing from the concept of the present utility model, several simple deductions or substitutions can still be made, which should all be regarded as belonging to the protection scope determined by the claims submitted for the present utility model.

Claims

1. A magnetic flux converter having a protective function and being easy to assemble, comprising an electromagnetic mechanism (1), a moving iron core (2), and a push rod (3), characterized in that: The electromagnetic mechanism (1) is detachably connected and fixed to a push rod (3); the push rod (3) is provided with a protective shell (4) and is arranged on the outer wall of the electromagnetic mechanism (1); the protective shell (4) is provided with a tripping surface (41) and a reset surface (42); the reset surface (42) is used to reset and attract the electromagnetic mechanism (1); and the tripping surface (41) is used to trip the circuit breaker.

2. The magnetic flux converter with protective function and easy to assemble according to claim 1 is characterized in that: The reset surface (42) is located on the end surface of the push rod (3), the gate-opening surface (41) is in a vertical relationship with the side surface of the electromagnetic mechanism (1), and an arc-inducing surface (43) is provided on the side of the gate-opening surface (41).

3. The magnetic flux converter with protective function and easy to assemble according to claim 1 is characterized in that: The electromagnetic mechanism (1) comprises a coil frame (11), a yoke frame (12), a yoke cover (13), a static iron core (14), a magnet (15), and an iron core. The magnet (15), the static iron core (14), and the coil frame (11) are sequentially placed in the yoke frame (12). The coil frame (11) is provided with a coil (16). The yoke cover (13) abuts against the end surface of the yoke frame (12). Clamping portions (121) are provided on both sides of the yoke frame (12) and are pressed against the yoke cover (13). The yoke cover (13) is provided with a first limiting column (131). The first limiting column (131) is provided with a cavity (132). The cavity (132) is provided with a through hole (133).

4. The magnetic flux converter with protective function and easy to assemble according to claim 3 is characterized in that: The bottom of the coil frame (11) is provided with a countersunk hole (111), the countersunk hole (111) is provided with a first through hole (112), the static iron core (14) and the magnet (15) are arranged in the countersunk hole (111), and the static iron core (14) is provided with a protruding column (141) and is arranged in the first through hole (112).

5. The magnetic flux converter with protection function and easy to assemble according to claim 4 is characterized in that: A release spring (5) is provided between the push rod (3) and the yoke iron cover (13); the push rod (3) is provided with a second limiting column (31) and is sleeved on the first limiting column (131); a guide column (32) is provided inside the second limiting column (31) and is arranged in the through hole (133); the guide column (32) is provided with a second through hole (33) and a fixing groove (34); the second through hole (33) and the fixing groove (34) are arranged crosswise.

6. The magnetic flux converter with protection function and easy to assemble according to claim 5, characterized in that: The moving iron core (2) is slidably arranged in the first through hole (112) and the cavity (132); the moving iron core (2) is provided with an extension column (21) and passes through the through hole (133); the end surface of the extension column (21) is provided with a fixing block (22) and passes through the second through hole (33); the push rod (3) is rotated so that the fixing block (22) faces the fixing groove (34); the release spring (5) acts on the push rod (3) so that the fixing block (22) abuts against the fixing groove (34).

7. The magnetic flux converter with protection function and easy to assemble according to claim 6, characterized in that: The distance between the end face of the second limiting column (31) and the yoke iron cover (13) is greater than the distance between the end face of the push rod (3) and the end face of the first limiting column (131), and the distance between the end face of the fixed block (22) and the end face of the push rod (3) is smaller than the distance between the end face of the push rod (3) and the end face of the first limiting column (131).

8. The magnetic flux converter with protection function and easy to assemble according to claim 6, characterized in that: The detachable arrangement is a fixed block (22).

9. The magnetic flux converter with protection function and easy to assemble according to claim 1, characterized in that: The end surface of the push rod (3) is provided with a recessed groove (35), the recessed groove (35) is provided with a plurality of convex bumps (36) and abuts against the protective shell (4), and the push rod (3) and the protective shell (4) are welded together by ultrasonic wave.

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