Undervoltage release

Abstract

The utility model relates to an undervoltage release, which comprises a shell and an electromagnetic assembly arranged in the shell, the shell comprises a base, a bottom plate and a cover plate, the bottom plate and the cover plate are arranged on the base, and an accommodating cavity for accommodating a circuit board is formed between the base and the bottom plate. The electromagnetic assembly comprises a support arranged on the base, a coil framework arranged on the support, a coil arranged on the coil framework, a static iron core arranged in the coil framework, a movable iron core arranged in the coil framework and matched with the static iron core, an ejector rod arranged on the movable iron core in a linkage mode, and a spring arranged between the ejector rod and the static iron core. The cover plate is arranged on the support and covers the coil, the coil is connected with a wire, and one end of the wire penetrates through the containing cavity and is provided with a wiring nose extending out of the base. The utility model has the advantages of simple structure, stable and reliable performance, convenient assembly and good protection performance.

Description

Technical Field

[0001] The utility model relates to the technical field of low-voltage electrical appliances, and particularly relates to an under-voltage release. Background Art

[0002] At present, the release has protection functions such as overload, open circuit, leakage, under-voltage, over-voltage, imbalance, under-frequency, over-frequency, reverse power, phase sequence, etc. When the applied voltage drops, even slowly drops to the range of 70% to 35% of the rated voltage, the release combined with the switching electrical appliance responds and operates to disconnect the electrical appliance, so as to achieve the function of protecting the electrical equipment. The coil of the existing under-voltage release is exposed, and the protection performance is poor. Moreover, the under-voltage release also has defects such as complex structure, unreliable performance, and cumbersome assembly. Summary of the Invention

[0003] The purpose of the utility model is to overcome the defects of the prior art and provide an under-voltage release with simple structure, stable and reliable performance, convenient assembly, and good protection performance.

[0004] To achieve the above purpose, the utility model adopts an under-voltage release, which includes a housing and an electromagnetic component arranged in the housing. The housing includes a base, a bottom plate arranged on the base, and a cover plate. A receiving cavity for placing a circuit board is formed between the base and the bottom plate. The electromagnetic component includes a bracket arranged on the base, a coil bobbin arranged on the bracket, a coil arranged on the coil bobbin, a static iron core arranged in the coil bobbin, a moving iron core arranged in the coil bobbin and cooperating with the static iron core, a push rod linked to the moving iron core, and a spring arranged between the push rod and the static iron core. The cover plate is arranged on the bracket and covers the coil. The coil is connected with a wire, and one end of the wire passes through the receiving cavity and is provided with a terminal lug extending outside the base.

[0005] The beneficial effects of the above structure are as follows: The electromagnetic component adopts a modular structure design, so that the modular assembly of the electromagnetic component and the housing can be realized, the assembly efficiency is higher, and the cover plate can prevent the coil of the electromagnetic component from being exposed outside the housing, and the protection performance is better. Moreover, the coil is led out through a wire, so that the wiring is more convenient. Therefore, the under-voltage release has the advantages of simple structure, stable and reliable performance, convenient assembly, and good protection performance.

[0006] Particularly, a positioning groove for cooperating with the spring is arranged on the static iron core. One end of the spring is clamped in the positioning groove. A positioning convex ring is arranged on the push rod. The spring is sleeved on the push rod, and the other end of the spring abuts against the positioning convex ring. The spring is clamped between the push rod and the static iron core, which is convenient for the assembly of the spring with the push rod and the static iron core, and can ensure the reliable operation of the push rod.

[0007] Particularly, a guide sleeve is provided inside the coil bobbin corresponding to the moving iron core. One end of the moving iron core is inserted into the guide sleeve, forming a sliding connection and cooperation between the moving iron core and the guide sleeve. The guide sleeve guides the moving iron core, ensuring reliable operation of the moving iron core.

[0008] Particularly, clamping holes are respectively provided on the bracket corresponding to both sides of the cover plate. Clamping posts are respectively provided on both sides of the cover plate and are matched with the clamping holes. The clamping posts are clamped in the clamping holes, forming a clamping connection and cooperation between the cover plate and the bracket. The cover plate and the bracket are assembled by means of clamping connection, which is more convenient and has higher assembly efficiency.

[0009] Particularly, clamping bosses are respectively provided on both sides of the bottom plate. A clamping hole is provided on the base and is matched with the clamping boss. The clamping boss is clamped in the clamping hole, forming a clamping connection and cooperation between the bottom plate and the base. The bottom plate and the base are connected by means of clamping connection, which is convenient for the assembly of the bottom plate and the base and has higher assembly efficiency.

[0010] Particularly, three clamping positioning posts are respectively provided at one end of the base, and the three clamping positioning posts are distributed in a "pin" shape. Clamping positioning posts are provided on the base, so that the under-voltage release can be installed in a clamping manner, and the installation efficiency is higher. Description of the Drawings

[0011] Figure 1 It is a perspective view of an embodiment of the present utility model.

[0012] Figure 2 It is a cross-sectional view of an embodiment of the present utility model.

[0013] Figure 3 It is an exploded view of an embodiment of the present utility model. Detailed Embodiment

[0014] As Figures 1 to 3As shown in the figure, an embodiment of the utility model is an under-voltage release, which includes a housing 10 and an electromagnetic assembly 20 arranged inside the housing 10. The housing 10 includes a base 11, a bottom plate 12 arranged on the base 11, and a cover plate 13. A receiving cavity 100 for placing a circuit board is formed between the base 11 and the bottom plate 12. The electromagnetic assembly 20 includes a bracket 21 arranged on the base 11, a coil bobbin 22 arranged on the bracket 21, a coil 23 arranged on the coil bobbin 22, a static iron core 24 arranged inside the coil bobbin 22, a moving iron core 25 arranged inside the coil bobbin 22 and cooperating with the static iron core 24, a push rod 26 linked to the moving iron core 25, and a spring 27 arranged between the push rod 26 and the static iron core 24. The cover plate 13 is arranged on the bracket 21 and covers the coil 23. The coil 23 is connected with a wire 28, and one end of the wire 28 passes through the receiving cavity 100 and is provided with a connection nose 29 extending outside the base 11.

[0015] As Figure 2 and 3 shown in the figure, a positioning groove 241 for cooperating with the spring 27 is arranged on the static iron core 24. One end of the spring 27 is clamped in the positioning groove 241. A positioning convex ring 261 is arranged on the push rod 26. The spring 27 is sleeved on the push rod 26, and the other end of the spring 27 abuts against the positioning convex ring 261. The spring is clamped between the push rod and the static iron core, which is convenient for the assembly of the spring with the push rod and the static iron core, and can ensure the reliable movement of the push rod. A guiding sleeve 30 is arranged corresponding to the moving iron core 25 inside the coil bobbin 22. One end of the moving iron core 25 is inserted into the guiding sleeve 30, and a sliding connection and cooperation between the moving iron core 25 and the guiding sleeve 30 are formed. The guiding sleeve plays a guiding role for the moving iron core, and can ensure the reliable movement of the moving iron core. Clamping holes 211 are respectively arranged on the bracket 21 corresponding to both sides of the cover plate 13. Clamping posts 131 cooperating with the clamping holes 211 are respectively arranged on both sides of the cover plate 13. The clamping posts 131 are clamped in the clamping holes 211, and a clamping cooperation between the cover plate 13 and the bracket 21 is formed. The cover plate and the bracket are assembled by a clamping cooperation method, which is more convenient for assembly and has higher assembly efficiency. Clamping bosses 121 are respectively arranged on both sides of the bottom plate 12. Clamping holes 111 cooperating with the clamping bosses 121 are arranged on the base 11. The clamping bosses 121 are clamped in the clamping holes 111, and a clamping cooperation between the bottom plate 12 and the base 11 is formed. The bottom plate and the base are connected by a clamping cooperation method, which is convenient for the assembly of the bottom plate and the base and has higher assembly efficiency. Three clamping positioning posts 112 are respectively arranged at one end of the base 11, and the three clamping positioning posts 112 are distributed in a "pin" shape. Clamping positioning posts are arranged on the base, so that the under-voltage release can be installed in a clamping manner, and the installation efficiency is higher.

[0016] The electromagnetic component adopts a modular structure design, so that the modular assembly of the electromagnetic component and the housing can be realized, with higher assembly efficiency. Moreover, the cover plate can prevent the coil of the electromagnetic component from being exposed outside the housing, with better protection performance. And the coil is led out through a wire, making the wiring more convenient. Therefore, this under-voltage release has the advantages of simple structure, stable and reliable performance, convenient assembly and good protection performance.

Claims

1. An undervoltage release, characterized in that: It includes a housing and an electromagnetic component disposed within the housing. The housing includes a base, a bottom plate disposed on the base, and a cover plate. A receiving cavity for placing a circuit board is formed between the base and the bottom plate. The electromagnetic component includes a bracket disposed on the base, a coil bobbin disposed on the bracket, a coil disposed on the coil bobbin, a stationary iron core disposed within the coil bobbin, a moving iron core disposed within the coil bobbin and cooperating with the stationary iron core, a push rod linked to the moving iron core, and a spring disposed between the push rod and the stationary iron core. The cover plate is disposed on the bracket and covers the coil. The coil is connected to a wire, and one end of the wire passes through the receiving cavity and is provided with a terminal lug extending outside the base.

2. The undervoltage release according to claim 1, characterized in that: The stationary iron core is provided with a positioning groove for cooperating with the spring. One end of the spring is engaged in the positioning groove. The push rod is provided with a positioning convex ring. The spring is sleeved on the push rod, and the other end of the spring abuts against the positioning convex ring.

3. The undervoltage release according to claim 1 or 2, characterized in that: A guide sleeve is provided corresponding to the moving iron core within the coil bobbin. One end of the moving iron core is inserted into the guide sleeve, and a sliding connection and cooperation between the moving iron core and the guide sleeve are formed.

4. The undervoltage release according to claim 1 or 2, characterized in that: Corresponding to both sides of the cover plate on the bracket, engaging holes are respectively provided. On both sides of the cover plate, engaging posts cooperating with the engaging holes are respectively provided. The engaging posts are engaged in the engaging holes, and a clamping connection and cooperation between the cover plate and the bracket are formed.

5. The undervoltage release according to claim 1 or 2, characterized in that: On both sides of the bottom plate, clamping convex platforms are respectively provided. On the base, clamping holes cooperating with the clamping convex platforms are provided. The clamping convex platforms are engaged in the clamping holes, and a clamping connection and cooperation between the bottom plate and the base are formed.

6. The undervoltage release according to claim 1 or 2, characterized in that: On one end of the base, three clamping and positioning posts are respectively provided, and the three clamping and positioning posts are distributed in a "pin" shape.

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