pull-in under voltage release

Abstract

The utility model belongs to low -voltage electric appliance technical field discloses a kind of suction type under voltage release, including shell, core assembly and linkage assembly, shell has accommodating cavity, core assembly includes magnetic yoke, first elastic member, static core, coil assembly and moving core, magnetic yoke is fixedly arranged in accommodating cavity, static core is arranged in magnetic yoke, coil assembly is sleeved in static core, moving core is slidably arranged in coil assembly, first elastic member is elastically clamped between static core and moving core. Linkage assembly includes linkage push rod, linkage push rod includes sliding main body part and connecting part, part of sliding main body part is slidably arranged in accommodating cavity, connecting part is connected with moving core at one end of sliding main body part in accommodating cavity. The suction type under voltage release improves the action stability of linkage push rod, and the overall structure is more reliable;And by part of linkage push rod is arranged in the accommodating cavity of shell, improve the compactness of overall structure, can effectively reduce overall structure size.

Description

TECHNICAL FIELD

[0001] The utility model relates to low voltage electrical apparatus technical field especially relates to a kind of suction type under-voltage release. BACKGROUND

[0002] Under-voltage release is often used for under-voltage protection of circuit breaker, when under-voltage occurs in line controlled by circuit breaker, under-voltage release can trigger circuit breaker to release, so that circuit breaker is disconnected to realize protection.

[0003] At present, under-voltage release can be divided into self-suction type and suction type according to application requirements.The advantage of self-suction type under-voltage release is that the action structure is simple, and it can realize the attraction of armature and iron core under the magnetic flux generated by coil assembly without relying on external force.The disadvantage is that the starting and protection power consumption is large;Suction type under-voltage release needs to complete the attraction task under the action of external force.The existing suction type under-voltage release moves dynamic iron core towards static iron core by linkage push rod to make dynamic iron core and static iron core attract each other, but the linkage push rod of the existing suction type under-voltage release is generally arranged outside the shell, which has complex structure and large size.In addition, since the linkage push rod is located outside the shell, the linkage push rod is disturbed when moving, which affects the action stability of linkage push rod and easily leads to structural failure. SUMMARY

[0004] The utility model aims at providing a kind of suction type under-voltage release, which is stable and compact in structure, and can effectively reduce the overall structure size.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] Suction type under-voltage release, comprising:

[0007] Shell with accommodating cavity;

[0008] Iron core assembly, comprising magnetic yoke, first elastic member, static iron core, coil assembly and dynamic iron core, the magnetic yoke is fixedly arranged in the accommodating cavity, the static iron core is arranged in the magnetic yoke, the coil assembly is sleeved on the static iron core, the dynamic iron core is slidably arranged in the coil assembly, and the first elastic member is elastically clamped between the static iron core and the dynamic iron core;

[0009] Linkage assembly, comprising linkage push rod, the linkage push rod comprises sliding main body part and connecting part, a part of the sliding main body part is slidably arranged in the accommodating cavity, and the connecting part is arranged at one end of the sliding main body part in the accommodating cavity and connected with the dynamic iron core.

[0010] As an option, the moving iron core comprises a middle part, a reset part arranged at one end of the middle part, and a T-shaped part arranged at the other end of the middle part, the reset part is in sliding connection with the coil assembly, the first elastic member is arranged between the static iron core and the reset part in an elastic manner, the middle part is in sliding connection with the yoke at the end away from the static iron core, and the T-shaped part is connected with the connecting part.

[0011] As an option, the iron core assembly further comprises a second elastic member.

[0012] The connecting part is provided with a through groove, the connecting rod of the T-shaped part is arranged in the through groove, and the end of the T-shaped part is limited on the side of the connecting part away from the reset part.

[0013] The middle part is provided with a stepped surface, and the second elastic member is elastically clamped between the stepped surface and the side of the connecting part close to the reset part.

[0014] As an option, the side of the connecting part away from the reset part is provided with a recessed groove in communication with the through groove, and the end of the T-shaped part is limited in the recessed groove.

[0015] As an option, the shell comprises a shell body and a cover body, the shell body is provided with an opening and a avoiding notch in communication with the opening, the cover body is used for covering the opening to form a containing cavity, the iron core assembly and the connecting part are arranged in the containing cavity, and the sliding main body part is arranged in the avoiding notch so that part of the sliding main body part is located in the containing cavity.

[0016] As an option, a circuit board is further included, and the circuit board is arranged in the containing cavity and between the sliding main body part and the cover body.

[0017] As an option, a plurality of supporting parts are arranged in the shell body, a plurality of pressing parts are arranged on the side of the cover body facing the shell body, the circuit board is supported on the plurality of supporting parts, and the plurality of pressing parts press on the circuit board.

[0018] As an option, the circuit board is provided with transverse horizontal terminals on the side surface facing the cover body.

[0019] As an option, the linkage assembly further comprises a guide shaft, and the guide shaft is arranged in the sliding main body part.

[0020] The yoke is provided with a first guide part and a second guide part distributed at intervals, the first guide part is provided with a first guide hole, the second guide part is provided with a second guide hole, and the guide shaft is arranged in sliding in the first guide hole and the second guide hole.

[0021] As an alternative, the magnetic yoke is further provided with a fixing part and a plug-in part, a cavity bottom of the accommodating cavity is provided with a plug-in slot, the fixing part is fixedly connected with the shell through fasteners, and the plug-in part is plugged with the plug-in slot.

[0022] The utility model discloses beneficial effect:

[0023] The auxiliary suction type under-voltage release provided by the utility model, by setting a part of the linkage push rod in the accommodating cavity of the shell, the shell can effectively protect the linkage push rod, improve the action stability of the linkage push rod, and the overall structure is more reliable. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is the structure schematic diagram of the auxiliary suction type under-voltage release provided by the utility model embodiment;

[0025] Figure 2 It is the structure schematic diagram of the iron core assembly related to the utility model embodiment;

[0026] Figure 3 It is the structure schematic diagram of the linkage push rod related to the utility model embodiment;

[0027] Figure 4 It is the structure schematic diagram when the moving iron core and the static iron core of the auxiliary suction type under-voltage release provided by the utility model embodiment are separated;

[0028] Figure 5 It is the structure schematic diagram when the moving iron core and the static iron core of the auxiliary suction type under-voltage release provided by the utility model embodiment are attracted;

[0029] Figure 6 It is the structure schematic diagram of the magnetic yoke pressing plate related to the utility model embodiment;

[0030] Figure 7 It is the structure schematic diagram of the circuit board and the shell related to the utility model embodiment;

[0031] Figure 8 It is the structure schematic diagram of the shell related to the utility model embodiment;

[0032] Figure 9 It is the structure schematic diagram of the cover related to the utility model embodiment.

[0033] In the drawing:

[0034] 1, housing; 11, shell; 111, slot; 112, avoiding gap; 113, support part; 114, buckle; 12, cover; 121, pressing part; 122, clamping groove;

[0035] 2, core assembly; 21, yoke; 211, yoke support; 2111, first guide part; 2111a, first guide hole; 2112, fixed part; 2113, insertion part; 212, yoke pressing plate; 2121, second guide part; 2121a, second guide hole; 2122, flange; 22, first elastic member; 23, static core; 24, coil assembly; 25, moving core; 251, middle part; 2511, step surface; 252, reset part; 253, T-shaped part; 26, second elastic member; 27, yoke guide sleeve;

[0036] 3, linkage assembly; 31, linkage push rod; 311, sliding main body part; 312, connecting part; 3121, through groove; 3122, recessed groove; 313, stress part; 314, hitting part; 32, guide shaft;

[0037] 4, circuit board; 41, transverse horizontal terminal. DETAILED DESCRIPTION

[0038] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals represent the same or similar components or components having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0039] In the description of the present application, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0040] In the description of the utility model, unless another definite provision and limitation, first feature is in second feature "on" or "under" can include first feature and second feature direct contact, also can include first feature and second feature is not direct contact but is through the contact between other features between them.And, first feature is in second feature "on", "above" and "on" include first feature is in second feature directly above and oblique, or just indicate that first feature horizontal height is higher than second feature.First feature is in second feature "under", "below" and "under" include first feature is in second feature directly below and oblique, or just indicate that first feature horizontal height is less than second feature.

[0041] The technical scheme of the utility model is further illustrated below by specific implementation manners in combination with the drawings.

[0042] As Figures 1-5 Indicated, the utility model discloses an inhale formula under -voltage release can be applied to circuit breaker, it includes shell 1, iron core subassembly 2 and linkage subassembly 3.

[0043] Among them, shell 1 has accommodating cavity.Iron core subassembly 2 includes magnetic yoke 21, first elastic part 22, static iron core 23, coil assembly 24 and dynamic iron core 25, magnetic yoke 21 is fixedly arranged in accommodating cavity, static iron core 23 is arranged in magnetic yoke 21, coil assembly 24 is sleeved in static iron core 23, dynamic iron core 25 is slidably arranged in coil assembly 24, and first elastic part 22 (optional compression spring) is elastically clamped between static iron core 23 and dynamic iron core 25.Linkage subassembly 3 includes linkage push rod 31, and linkage push rod 31 includes sliding main body part 311, connecting part 312, stress part 313 and beating part 314, and sliding main body part 311 is partially slidably arranged in accommodating cavity, and connecting part 312 is arranged at one end of sliding main body part 311 in accommodating cavity, and connecting part 312 is connected with dynamic iron core 25, and stress part 313 and beating part 314 are arranged at one end of sliding main body part 311 outside accommodating cavity.

[0044] When circuit breaker is closed, stress part 313 can make linkage push rod 31 move under the action of rocker arm force of circuit breaker, and then make connecting part 312 can drive dynamic iron core 25 and move towards static iron core 23 and attract, form magnetic circuit, first elastic part 22 handles compression state at this time, but the elastic force provided by first elastic part 22 is less than the electromagnetic attraction between dynamic iron core 25 and static iron core 23, therefore, under the condition that circuit breaker is continuously powered, dynamic iron core 25 and static iron core 23 will keep attract state, when circuit breaker is powered off, electromagnetic attraction disappears, dynamic iron core 25 is away from static iron core 23 under the elastic action of first elastic part 22, simultaneously, dynamic iron core 25 makes linkage push rod 31 reset, and then makes beating part 314 movement and makes the release mechanism of circuit breaker release.

[0045] The auxiliary suction type under-voltage release can effectively protect the linkage push rod 31 by arranging a part of the linkage push rod 31 in the accommodating cavity of the shell 1, improve the action stability of the linkage push rod 31, and the overall structure is more reliable; and the overall structure is compact by arranging a part of the linkage push rod 31 in the accommodating cavity of the shell 1, and the overall structure size can be effectively reduced.

[0046] Optionally, the magnetic yoke 21 comprises a magnetic yoke bracket 211 and a magnetic yoke pressing plate 212, the magnetic yoke bracket 211 is fixedly arranged in the accommodating cavity, the magnetic yoke pressing plate 212 is fixedly connected with the magnetic yoke bracket 211, the static iron core 23 is fixedly arranged in the magnetic yoke bracket 211, the dynamic iron core 25 is slidingly arranged in the coil assembly 24, and the dynamic iron core 25 is slidingly connected with the sliding hole of the magnetic yoke pressing plate 212, which makes the dynamic iron core 25 slide stably.

[0047] Optionally, the sliding hole of the magnetic yoke pressing plate 212 is provided with a magnetic yoke guide sleeve 27, and the dynamic iron core 25 is slidingly connected with the magnetic yoke guide sleeve 27, so that the dynamic iron core 25 slides more smoothly and stably.

[0048] In other embodiments, the sliding hole of the magnetic yoke pressing plate 212 can also be provided with a flange 2122 to replace the magnetic yoke guide sleeve 27, and the flange 2122 is provided with a sliding hole 2122a, and the dynamic iron core 25 is slidingly connected with the sliding hole 2122a. Figure 6 .

[0049] As shown in Figures 1-2 , in order to make the linkage push rod 31 move more stably, the linkage assembly 3 further comprises a guide shaft 32, the guide shaft 32 is arranged on the sliding main body part 311; the magnetic yoke bracket 211 and the magnetic yoke pressing plate 212 are respectively provided with a first guide part 2111 and a second guide part 2121 on the side facing the sliding main body part 311, the first guide part 2111 is provided with a first guide hole 2111a, the second guide part 2121 is provided with a second guide hole 2121a, and the guide shaft 32 is slidingly arranged in the first guide hole 2111a and the second guide hole 2121a. This structure makes the linkage push rod 31 move, which can drive the guide shaft 32 to slide in the first guide hole 2111a and the second guide hole 2121a, so as to limit the sliding of the linkage push rod 31.

[0050] Further, in order to realize the fixed connection of the guide shaft 32 and the linkage push rod 31, the head of the guide shaft 32 is provided with a clamping groove, the guide shaft 32 and the linkage push rod 31 can be clamped and fixed through the clamping groove, the linkage push rod 31 drives the guide shaft 32 to slide in the first guide hole 2111a and the second guide hole 2121a when moving, and the guide shaft 32 can limit the sliding of the linkage push rod 31.

[0051] Optionally, the magnetic yoke support 211 is provided with a fixed part 2112 and a plug-in part 2113 on the side of the cavity bottom of the accommodating cavity, the cavity bottom of the accommodating cavity is provided with a slot 111, the fixed part 2112 is fixedly connected with the shell 1 by a fastener, and the plug-in part 2113 is plugged into the slot 111. This structure makes the magnetic yoke support 211 easy to install. During installation, the plug-in part 2113 is first inserted into the slot 111, so that the position of the magnetic yoke support 211 is fixed, and then the fixed part 2112 is fixedly connected with the shell 1 by using the fastener.

[0052] In this embodiment, the fixed part 2112 is provided with a first mounting hole, the shell 1 is provided with a second mounting hole on the cavity bottom of the accommodating cavity, and the fastener can be a bolt. The bolt is arranged in the first mounting hole and the second mounting hole to connect the fixed part 2112 with the shell 1.

[0053] Optionally, the moving iron core 25 includes a middle part 251, a reset part 252 arranged at one end of the middle part 251, and a T-shaped part arranged at the other end of the middle part 251. The reset part 252 is in sliding connection with the coil assembly 24, the first elastic member 22 is elastically arranged between the static iron core 23 and the reset part 252, the middle part 251 is in sliding connection with the magnetic yoke pressing plate 212, and the T-shaped part 253 is connected with the connecting part 312. The moving iron core 25 is designed in an integrated structure, which is simple in structure and can not only realize stable sliding but also realize connection with the connecting part 312.

[0054] In order to facilitate the installation of the first elastic member 22, the reset part 252 and the static iron core 23 are both provided with a groove at the end facing each other, and the two ends of the first elastic member 22 are respectively limited in the two grooves.

[0055] Specifically, the iron core assembly 2 further includes a second elastic member 26 (which can be a compression spring); the connecting part 312 is provided with a through groove 3121, the connecting rod of the T-shaped part 253 is arranged in the through groove 3121, and the end of the T-shaped part 253 is limited on the side of the connecting part 312 away from the reset part 252; the middle part 251 is provided with a stepped surface 2511, and the second elastic member 26 is elastically clamped between the stepped surface 2511 and the side of the connecting part 312 close to the reset part 252. When the linkage push rod 31 drives the moving iron core 25 and the static iron core 23 to attract under the action of the rocker arm of the circuit breaker, the second elastic member 26 is compressed, and the elastic force of the second elastic member 26 can enhance the attraction force between the moving iron core 25 and the static iron core 23, so that the attraction is more stable. In addition, the second elastic member 26 can also buffer the linkage push rod 31 to prevent the linkage push rod 31 from being damaged due to excessive force. That is, when the linkage push rod 31 is excessively pushed by the rocker arm of the circuit breaker, the moving iron core 25 and the static iron core 23 have already been attracted, and the second elastic member 26 is compressed. On the one hand, the attraction force between the moving iron core 25 and the static iron core 23 is increased, and on the other hand, the linkage push rod 31 is protected from being damaged.

[0056] Referring back to Figures 3-4 As shown in the figure, the connecting part 312 is provided with a recessed groove 3122 communicating with the through groove 3121 at the side away from the reset part 252, and the end of the T-shaped part 253 is limited in the recessed groove 3122, so that the T-shaped part 253 can be prevented from colliding with the inner wall of the shell 1 and improving the moving stroke of the linkage push rod 31.

[0057] Specifically, the shell 1 includes a shell body 11 and a cover body 12, the shell body 11 is provided with an opening and an avoiding gap 112 communicating with the opening, the cover body 12 is used for covering the opening to form a containing cavity, the sliding main body part 311 is arranged in the avoiding gap 112 so that a part of the sliding main body part 311 is located in the containing cavity, and the force receiving part 313 and the hitting part 314 are located outside the containing cavity. The three side walls of the shell body 11 are provided with buckles 114, and the three side walls of the cover body 12 are provided with clamping grooves 122. When the cover body 12 covers the shell body 11, the buckles 114 and the clamping grooves 122 are clamped to connect the cover body 12 and the shell body 11 conveniently. It can be understood that the three side walls of the cover body 12 are provided with extension parts extending towards the shell body 11, and the clamping grooves 122 are arranged on the extension parts.

[0058] As Figures 7-9 shown, the suction type under-voltage release further includes a circuit board 4 arranged in the containing cavity and between the sliding main body part 311 and the cover body 12. By arranging the circuit board 4 horizontally between the sliding main body part 311 and the cover body 12, the overall size can be further reduced.

[0059] Specifically, the shell body 11 is provided with a plurality of supporting parts 113, and the cover body 12 is provided with a plurality of pressing parts 121 at the side facing the shell body 11. The circuit board 4 can be supported on the plurality of supporting parts 113, and when the cover body 12 covers the opening of the shell body 11, the plurality of pressing parts 121 can press on the circuit board 4. This structure makes the installation of the circuit board 4 more convenient, and the circuit board 4 can be fixed without fasteners.

[0060] Optionally, the side surface of the circuit board 4 facing the cover body 12 is provided with a horizontal lying terminal 41. When the terminal is inserted and pulled out, an action force parallel to the circuit board 4 is generated on the circuit board 4, so as to avoid the damage of the components on the circuit board 4 caused by the influence of the insertion and pulling force.

[0061] In this embodiment, the shell body 11 is a rectangular structure, the avoiding gap 112 is arranged at one corner position of the shell body 11, the remaining three corner positions in the shell body 11 are respectively provided with supporting parts 113, and one supporting part 113 is further arranged at a position between two corner positions. The cover body 12 is provided with pressing parts 121 at positions corresponding to the three corner positions of the shell body 11. In this structure, the supporting parts 113 and the pressing parts 121 are all abutted to the position of the circuit board 4 close to the edge, so that the circuit board 4 is fixed more stably.

[0062] Obviously, the above embodiments of the present application are merely examples for clearly illustrating the present application, and are not intended to limit the embodiments of the present application. For those skilled in the art, other different forms of changes or variations can be made on the basis of the above description. Here, it is not necessary and impossible to exhaust all the embodiments. Any modification, equivalent replacement and improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. A power pump under voltage release characterized in that, The utility model relates to a magnetic switch, including: A shell (1) has a containing cavity; An iron core assembly (2) includes a magnetic yoke (21), a first elastic member (22), a static iron core (23), a coil assembly (24) and a dynamic iron core (25), the magnetic yoke (21) is fixedly arranged in the containing cavity, the static iron core (23) is arranged in the magnetic yoke (21), the coil assembly (24) is sleeved on the static iron core (23), the dynamic iron core (25) is slidably arranged in the coil assembly (24), and the first elastic member (22) is elastically clamped between the static iron core (23) and the dynamic iron core (25); A linkage assembly (3) includes a linkage push rod (31), the linkage push rod (31) includes a sliding main body portion (311) and a connecting portion (312), the sliding main body portion (311) is partially slidably arranged in the containing cavity, and the connecting portion (312) is arranged at one end of the sliding main body portion (311) in the containing cavity and is connected with the dynamic iron core (25).

2. The draw-out under voltage release according to claim 1, characterized in that The dynamic iron core (25) includes an intermediate portion (251), a reset portion (252) arranged at one end of the intermediate portion (251) and a T-shaped portion (253) arranged at the other end of the intermediate portion (251), the reset portion (252) is slidably connected with the coil assembly (24), the first elastic member (22) is elastically arranged between the static iron core (23) and the reset portion (252), the intermediate portion (251) is slidably connected with one end of the magnetic yoke (21) away from the static iron core (23), and the T-shaped portion (253) is connected with the connecting portion (312).

3. The draw-out under voltage release according to claim 2, characterized in that The iron core assembly (2) further includes a second elastic member (26); The connecting portion (312) is provided with a through groove (3121), a connecting rod of the T-shaped portion (253) is arranged in the through groove (3121), and an end of the T-shaped portion (253) is limited on one side of the connecting portion (312) away from the reset portion (252). The intermediate portion (251) is provided with a stepped surface (2511), and the second elastic member (26) is elastically clamped on one side of the connecting portion (312) close to the reset portion (252) and the stepped surface (2511).

4. The draw-out under voltage release according to claim 3, characterized in that One side of the connecting portion (312) away from the reset portion (252) is provided with a recessed groove (3122) in communication with the through groove (3121), and the end of the T-shaped portion (253) is limited in the recessed groove (3122).

5. The draw-out under voltage release according to claim 1, characterized in that The shell (1) includes a shell body (11) and a cover body (12), the shell body (11) is provided with an opening and an avoidance notch (112) in communication with the opening, the cover body (12) is used for covering the opening to form a containing cavity, the iron core assembly (2) and the connecting portion (312) are arranged in the containing cavity, and the sliding main body portion (311) is arranged in the avoidance notch (112) so that part of the sliding main body portion (311) is located in the containing cavity.

6. The draw-out under voltage release according to claim 5, characterized in that A circuit board (4) is arranged in the accommodating cavity between the sliding main body portion (311) and the cover (12).

7. The draw-out under voltage release according to claim 6, characterized in that The housing (11) is provided with a plurality of supporting portions (113), and the cover (12) is provided with a plurality of pressing portions (121) on a side facing the housing (11), the circuit board (4) is supported on the supporting portions (113), and the pressing portions (121) press the circuit board (4).

8. The draw-out under voltage release according to claim 6, characterized in that The circuit board (4) is provided with transverse horizontal terminals (41) on a side facing the cover (12).

9. The draw-out under voltage release according to claim 1, characterized in that The linkage assembly (3) further comprises a guide shaft (32) penetrating the sliding main body portion (311); The magnetic yoke (21) is provided with spaced first guide portions (2111) and second guide portions (2121), the first guide portions (2111) are provided with first guide holes (2111a), the second guide portions (2121) are provided with second guide holes (2121a), and the guide shaft (32) penetrates the first guide holes (2111a) and the second guide holes (2121a).

10. The draw-out under voltage release according to claim 1, characterized in that The magnetic yoke (21) is further provided with a fixing portion (2112) and a plug-in portion (2113), the bottom of the accommodating cavity is provided with a slot (111), the fixing portion (2112) is fixedly connected with the shell (1) through a fastener, and the plug-in portion (2113) is plugged with the slot (111).

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