Suction assisting type under-voltage release

Abstract

The utility model belongs to the technical field of electrical protection devices, and discloses a suction-assisted undervoltage release, which comprises a release main body and a linkage assembly, the release main body comprises a magnet yoke provided with a first yoke plate and a second yoke plate which are oppositely arranged, a coil framework arranged in the magnet yoke, a coil arranged outside the coil framework in a sleeving manner, a static iron core arranged in the coil framework and fixed on the second yoke plate, a movable iron core arranged in the coil framework in a sliding manner, and a connecting rod; the first end of the connecting rod slidably penetrates through the first yoke plate, and the second end is connected with the movable iron core; the linkage assembly comprises a first elastic piece arranged between the movable iron core and the static iron core and a linkage push rod capable of moving in the axial direction of the coil. One end of the linkage push rod is connected with the first end of the connecting rod, and two opposite sides of the other end of the linkage push rod are respectively provided with a stress part driven by external force and a force application part for pushing the circuit breaker to trip. According to the suction assisting type undervoltage release, the linkage assembly matched with external force is simple in structure, and the number of parts is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical protection devices, in particular to a suction-assisted undervoltage release. Background Art

[0002] In order to realize the undervoltage protection function of the circuit breaker, it is often necessary to install and use an undervoltage release in the circuit breaker. The working process of the undervoltage release is: when the coil of the undervoltage release obtains sufficient voltage, the push rod will move away from the traction rod or the tripping half-shaft on the circuit breaker operating mechanism as the moving and static contacts of the undervoltage release are attracted, so that the circuit breaker can be opened and closed normally; when the power supply voltage drops or is insufficient, the push rod will press against the traction rod or the tripping half-shaft as the moving and static contacts of the undervoltage release are separated, so that the operating mechanism is in the open state, thereby protecting the load electrical appliances below the circuit breaker from damage due to undervoltage.

[0003] Undervoltage releasers are generally divided into self-priming undervoltage releasers and assisted-priming undervoltage releasers. Self-priming undervoltage releasers can achieve the closing of moving and static contacts under the action of the magnetic flux generated by the coil without relying on external force, but the starting and maintaining power consumption is relatively large; the assisted-priming undervoltage releaser needs to complete the closing of the moving and static contacts under the action of external force, and the power consumption is low. Chinese patent CN216528703U discloses an assisted-priming undervoltage release mechanism, which realizes the closing of moving and static contacts through the cooperation of a driving component and an external force, but the driving component structure is relatively complex, with many parts and components, high coordination requirements, and the force-bearing parts are easily damaged.

[0004] Therefore, it is urgent to propose an assisted suction undervoltage release to solve the above technical problems. Utility Model Content

[0005] The utility model provides a suction-assisted undervoltage release, the linkage assembly structure of which cooperates with external force is simple, the number of parts is reduced, the coordination requirement is low, and the production cost is reduced.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] Suction-assisted undervoltage release, including:

[0008] The release body comprises a yoke having a first yoke plate and a second yoke plate arranged opposite to each other, a coil frame arranged in the yoke, a coil sleeved outside the coil frame, a static iron core arranged in the coil frame and fixed on the second yoke plate, and a moving iron core slidably arranged in the coil frame, and a connecting rod, wherein the first end of the connecting rod is slidably inserted into the first yoke plate, and the second end of the connecting rod is connected to the moving iron core;

[0009] A linkage assembly, comprising a first elastic member arranged between the moving iron core and the stationary iron core and a linkage push rod capable of moving along the axial direction of the coil; one end of the linkage push rod is connected to the first end of the connecting rod, and opposite sides of the other end of the linkage push rod are respectively provided with a force receiving portion and a force applying portion;

[0010] The force-bearing part is used to enable the connecting rod to drive the moving iron core to overcome the elastic force of the first elastic member and to be attracted to the static iron core under the driving of external force when the current in the coil is normal;

[0011] The first elastic member is used to make the moving iron core move away from the static iron core when the current in the coil weakens, and drive the force applying part to push the traction rod of the circuit breaker through the connecting rod until the circuit breaker is tripped.

[0012] Optionally, a first limiting flange is provided at the first end of the connecting rod, and a connecting portion is provided at one end of the linkage push rod. The connecting portion is provided with a notch that passes through the connecting portion along the axial direction of the coil and opens toward the connecting rod. The connecting rod is slidably arranged in the notch through the opening, and the first limiting flange abuts against the connecting portion; a second elastic member is provided on the outer sleeve of the connecting rod, one end of the second elastic member abuts against the connecting portion, and the other end abuts against the moving iron core.

[0013] Optionally, the notch includes a limiting notch and a connecting notch which are connected to each other along the axial direction of the coil frame, the limiting notch and the connecting notch form a limiting surface, the first limiting flange is slidably set in the limiting notch by the opening and abuts against the limiting surface, and the part of the connecting rod close to the first limiting flange is slidably set in the connecting notch by the opening.

[0014] Optionally, the moving iron core is provided with a through hole which passes through the moving iron core along the axial direction of the coil, the second end of the connecting rod is provided with a second limiting flange, the end of the first elastic member close to the moving iron core abuts against the second limiting flange, and the second limiting flange abuts against the outer edge of the through hole.

[0015] Optionally, a first assembly groove communicating with the through hole is provided at one end of the through hole facing the static iron core, and the first assembly groove and the through hole form an assembly surface; the second limiting flange is installed in the first assembly groove and abuts against the assembly surface;

[0016] A second assembly groove is provided at one end of the static iron core facing the movable iron core, one end of the first elastic member is installed in the first assembly groove, and the other end of the first elastic member is installed in the second assembly groove.

[0017] Optionally, the moving iron core and the connecting rod are an integrated structure.

[0018] Optionally, the suction-assisted undervoltage releaser also includes a base and a cover plate, and the base and the cover plate are snap-fitted together to form a accommodating cavity for fixing the releaser body; the base is provided with a first avoidance opening connecting the accommodating cavity and the outside world, and one end of the linkage push rod is passed through the first avoidance opening and is connected to the first end of the connecting rod.

[0019] Optionally, a guide groove extending along the axial direction of the coil is provided on the base, and a guide rib extending along the axial direction of the coil is provided on the side of the linkage push rod close to the base, and the guide rib is slidably connected to the guide groove along the axial direction of the coil.

[0020] Optionally, a plurality of hemispherical protrusions are provided on the inner wall of the guide groove in contact with the guide rib, and the protrusions are in contact with the guide rib.

[0021] Optionally, the first yoke plate and the second yoke plate are respectively provided with a first connecting ear and a second connecting ear on one side close to the linkage push rod, and the first connecting ear and the second connecting ear are both provided with connecting holes; the linkage push rod is respectively provided with a first limiting sliding groove and a second limiting sliding groove corresponding to the first connecting ear and the second connecting ear on one side facing the releaser body, the first connecting ear is provided with the first avoidance opening and is slidably provided in the first limiting sliding groove, the base is provided with a second avoidance opening opposite to the second connecting ear, and the second connecting ear is provided with the second avoidance opening and is slidably provided in the second limiting sliding groove;

[0022] The linkage push rod is also provided with a guide channel connecting the first limiting slide groove and the second limiting slide groove and a guide hole connecting the outside and the first limiting slide groove. On the base, a stopper is provided on one side of the first avoidance opening; the linkage assembly also includes a guide rod extending along the axial direction of the coil, the guide rod is passed through the guide hole and the connecting holes on the first connecting ear and the second connecting ear, and one end of the guide rod abuts against the stopper, and the other end abuts against the bottom wall of the second limiting slide groove.

[0023] Optionally, the base is further provided with a limit baffle extending along the axial direction of the coil frame, and the side wall of the linkage push rod is slidably attached to the limit baffle.

[0024] Optionally, a controller circuit board installation space is further provided on the base, and the controller circuit board installation space is used to install a controller circuit board, and the controller circuit board is electrically connected to the coil.

[0025] Optionally, the base is provided with latching protrusions on two opposite sides along the axial direction of the coil, and the cover is provided with elastic buckles on two opposite sides along the axial direction of the coil frame, and the elastic buckles are latched with the corresponding latching protrusions.

[0026] Beneficial effects of the utility model:

[0027] The utility model provides an assisted suction undervoltage release, including a release body and a linkage assembly. When the current in the coil is normal, the force-bearing part on the linkage push rod is driven to move with the assistance of an external force, so that the linkage push rod drives the connecting rod connected thereto to move, and then the moving iron core connected to the connecting rod compresses the first elastic member and the static iron core to attract; when the current in the coil is weakened, the magnetic attraction between the moving iron core and the static iron core is weakened, and the first elastic member moves the moving iron core away from the static iron core under the action of the elastic restoring force, pushing the connecting rod connected to the moving iron core to move, and the movement of the connecting rod drives the linkage push rod connected thereto to move, so that the force-applying part on the linkage push rod pushes the traction rod of the circuit breaker to release during the movement, thereby protecting the circuit. The assisted suction undervoltage release can realize the attraction and separation between the moving iron core and the static iron core through the cooperation of the linkage push rod, the connecting rod and the first elastic member, has a simple structure, a small number of parts, and low coordination requirements, thereby reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0029] Figure 1 It is an exploded schematic diagram of the suction-assisted undervoltage release provided in the first embodiment of the utility model;

[0030] Figure 2 It is a structural schematic diagram of a linkage push rod of a suction-assisted undervoltage release provided in Embodiment 1 of the utility model;

[0031] Figure 3 yes Figure 2 A magnified view at point A;

[0032] Figure 4 It is a structural schematic diagram of the suction-assisted undervoltage release provided in the first embodiment of the utility model;

[0033] Figure 5 This is a cross-sectional view of the suction-assisted undervoltage release provided in the first embodiment of the utility model. Figure 1 (The moving iron core and the static iron core are in a separated state);

[0034] Figure 6 This is a cross-sectional view of the suction-assisted undervoltage release provided in the first embodiment of the utility model. Figure 2 (The moving iron core and the static iron core are in the attracted state);

[0035] Figure 7 This is an exploded schematic diagram of the suction-assisted undervoltage release provided in the second embodiment of the utility model;

[0036] Figure 8 It is a structural schematic diagram of the linkage push rod provided in the second embodiment of the utility model.

[0037] In the figure:

[0038] 100, release body; 110, magnetic yoke; 111, first yoke plate; 1111, first connecting ear; 112, second yoke plate; 1121, second connecting ear; 1122, connecting hole; 120, coil skeleton; 130, static iron core; 131, second assembly groove; 140, moving iron core; 141, first assembly groove; 150, connecting rod; 151, first limiting flange; 152, second limiting flange; 160, shaft sleeve; 170, magnetic isolation sleeve; 180, third assembly groove;

[0039] 200, linkage assembly; 210, first elastic member; 220, linkage push rod; 221, connecting portion; 2211, notch; 22111, limiting notch; 22112, connecting notch; 22113, limiting surface; 222, force-bearing portion; 223, force-applying portion; 224, guide rib; 225, first limiting slide groove; 226, second limiting slide groove; 227, guide channel; 228, guide hole; 230, second elastic member; 240, guide rod;

[0040] 300, base; 310, first avoidance opening; 320, guide groove; 321, protrusion; 330, second avoidance opening; 340, stopper; 350, limit baffle; 360, controller circuit board installation space; 370, card protrusion;

[0041] 400, cover plate; 410, elastic buckle. DETAILED DESCRIPTION

[0042] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0043] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0045] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0046] Embodiment 1

[0047] The present embodiment provides an assisted suction undervoltage release, and its linkage assembly 200 that cooperates with the external force has a simple structure, reduces the number of parts, and has low coordination requirements, thereby reducing production costs.

[0048] Specifically, Figure 1-Figure 6 As shown, the suction-assisted undervoltage release includes a release body 100 and a linkage assembly 200 .

[0049] The release body 100 includes a yoke 110 having a first yoke plate 111 and a second yoke plate 112 arranged oppositely, a coil frame 120 arranged in the yoke 110, a coil (not shown in the figure) sleeved outside the coil frame 120, a static iron core 130 arranged in the coil frame 120 and fixed on the second yoke plate 112, and a moving iron core 140 slidably arranged in the coil frame 120, and a connecting rod 150, the first end of the connecting rod 150 is slidably penetrated in the first yoke plate 111, and the second end of the connecting rod 150 is connected to the moving iron core 140. That is, the first yoke plate 111 and the second yoke plate 112 are arranged oppositely along the axial direction of the coil.

[0050] The linkage assembly 200 includes a first elastic member 210 disposed between the moving iron core 140 and the stationary iron core 130 and a linkage push rod 220 capable of moving along the axial direction of the coil. The first elastic member 210 is configured to always have a tendency to push the moving iron core 140 away from the stationary iron core 130. One end of the linkage push rod 220 is connected to the first end of the connecting rod 150, and the opposite sides of the other end of the linkage push rod 220 are respectively provided with a force receiving portion 222 and a force applying portion 223.

[0051] The suction-assisted undervoltage release provided in this embodiment can set the moving iron core 140 and the static iron core 130 at a distance along the axial direction of the coil through the first elastic member 210. If the coil is energized at this time and the current in the coil is normal, a sufficient magnetic field is generated between the moving iron core 140 and the static iron core 130. However, since the moving iron core 140 and the static iron core 130 are far apart, the magnetic attraction force at this distance is not sufficient to overcome the elastic force of the first elastic member 210, so the moving iron core 140 and the static iron core 130 cannot be automatically attracted. Therefore, external force is required to drive the force-bearing part 222 on the linkage push rod 220 to move, so that the linkage push rod 220 drives the connecting rod 150 connected thereto to move, and then the moving iron core 140 connected to the connecting rod 150 compresses the first elastic member 210 and the static iron core 130 to be attracted. At this time, when the external force is removed, the moving iron core 140 and the static iron core 130 can still remain attracted, that is, when the current in the coil is normal (the power supply voltage is normal), the static iron core 130 and the moving iron core 140 can still remain attracted without the assistance of external force.

[0052] It can be understood that in the process of the circuit breaker handle moving from the free tripping position to the opening position, the rocker arm connected to the handle will contact the force-bearing part 222 and drive the force-bearing part 222 to move. When the handle moves to the opening position, the moving iron core 140 and the static iron core 130 are attracted. At this time, the external force is removed, that is, the circuit breaker handle is pushed from the opening position to the closing position, and the moving iron core 140 and the static iron core 130 can still remain attracted.

[0053] When the external voltage is unstable and undervoltage occurs, the current in the coil weakens, and the magnetic attraction between the moving iron core 140 and the static iron core 130 weakens. At this time, the moving iron core 140 and the static iron core 130 cannot be effectively attracted. Under the action of the elastic restoring force, the first elastic member 210 causes the moving iron core 140 to move away from the static iron core 130, pushing the connecting rod 150 connected to the moving iron core 140 to move. The movement of the connecting rod 150 will drive the linkage push rod 220 connected thereto to move, so that the force-applying part 223 on the linkage push rod 220 pushes the traction rod of the circuit breaker to release during the movement, thereby protecting the circuit.

[0054] That is, the suction-assisted undervoltage release provided in this embodiment can realize the attraction and separation between the moving iron core 140 and the static iron core 130 through the cooperation of the linkage push rod 220, the connecting rod 150 and the first elastic member 210. It has a simple structure, a small number of parts and components, and low coordination requirements, thereby reducing production costs.

[0055] Further, see Figure 5 and Figure 6 In this embodiment, a mounting hole is provided on the first yoke plate 111. Since the first yoke plate 111 is relatively thin, a sleeve 160 is installed in the mounting hole, and one end of the moving iron core 140 is slidably inserted into the sleeve 160. By providing the sleeve 160, on the one hand, the movement of the moving iron core 140 along the axial direction of the coil can be guided, and on the other hand, the installation clearance between the sleeve 160 and the moving iron core 140 can be ensured to meet the requirements.

[0056] Further, see Figure 5 and Figure 6 A magnetic isolation sleeve 170 may be further provided outside the moving iron core 140 to isolate the suction force of the first yoke plate 111 on the moving iron core 140 when the moving iron core 140 is separated from the static iron core 130 .

[0057] Optionally, the magnetic isolation sleeve 170 may be made of brass.

[0058] Further, see Figure 5 and Figure 6 A connecting portion 221 is provided at one end of the linkage push rod 220, and the linkage push rod 220 is connected to the first end of the connecting rod 150 through the connecting portion 221. A first limiting flange 151 is provided at the first end of the connecting rod 150, and a notch 2211 is provided on the connecting portion 221 that passes through the connecting portion 221 along the axial direction of the coil and opens toward the connecting rod 150. The connecting rod 150 is slidably disposed in the notch 2211 through the opening, and the first limiting flange 151 abuts against the connecting portion 221.

[0059] A second elastic member 230 is disposed on the outer sleeve of the connecting rod 150 . One end of the second elastic member 230 abuts against the connecting portion 221 , and the other end abuts against the moving iron core 140 .

[0060] By setting the second elastic member 230, a floating connection between the connecting part 221 and the connecting rod 150 is realized. When the linkage push rod 220 drives the moving iron core 140 and the static iron core 130 to be attracted by the connecting rod 150 under the drive of external force, if the force-bearing part 222 on the linkage push rod 220 is continuously applied with external force, the connecting part 221 will compress the second elastic member 230 due to the movement, and will no longer push the connecting rod 150 to move. Although the compression of the second elastic member 230 will exert a certain pressure on the moving iron core 140, the force of the linkage push rod 220 can be buffered by the second elastic member 230, which plays a role in protecting the moving iron core 140 and the static iron core 130 when the linkage push rod 220 moves beyond the stroke. Moreover, with such a setting, when the above-mentioned suction-assisted undervoltage release is applied to circuit breakers of different models, it will not be unusable due to the different rocker arm strokes of the circuit breakers. The universality of the above-mentioned suction-assisted undervoltage release is improved.

[0061] Since the linkage push rod 220 and the moving iron core 140 both move along the axial direction of the coil, and in the present embodiment, the connecting rod 150 and the linkage push rod 220 both extend along the axial direction of the coil, the connecting portion 221 can be perpendicular to the linkage push rod 220. Such a configuration not only facilitates the connection between the linkage push rod 220 and the connecting rod 150, but also occupies as little space as possible, thereby improving the structural compactness of the above-mentioned suction-assisted undervoltage release.

[0062] Optionally, continue to see Figure 2 and Figure 3 The notch 2211 includes a limiting notch 22111 and a connecting notch 22112 that are interconnected along the axial direction of the coil skeleton 120. The limiting notch 22111 and the connecting notch 22112 form a limiting surface 22113. The first limiting flange 151 is slidably disposed in the limiting notch 22111 through an opening and abuts against the limiting surface 22113. The portion of the connecting rod 150 close to the first limiting flange 151 is slidably disposed in the connecting notch 22112 through an opening. By providing the limiting notch 22111 to accommodate the first limiting flange 151, the first limiting flange 151 can be prevented from protruding from the connecting portion 221, which can reduce the lengthwise dimension of the above-mentioned suction-assisted undervoltage release and improve the aesthetics.

[0063] Optionally, the moving iron core 140 and the connecting rod 150 are an integrated structure, and such a configuration can make the assembly of the above-mentioned suction-assisted undervoltage release easier.

[0064] Optionally, the moving iron core 140 and the connecting rod 150 may also be provided as a split structure, which can reduce the difficulty of processing the parts.

[0065] Exemplarily, the moving iron core 140 is provided with a through hole that passes through the moving iron core 140 along the axial direction of the coil, the second end of the connecting rod 150 is provided with a second limiting flange 152, and one end of the first elastic member 210 close to the moving iron core 140 abuts against the second limiting flange 152, and abuts the second limiting flange 152 against the outer edge of the through hole.

[0066] By abutting one end of the first elastic member 210 against the second limiting flange 152 , the connecting rod 150 and the moving iron core 140 can always be kept in synchronous motion, thereby reducing the assembly accuracy requirement between the moving iron core 140 and the connecting rod 150 .

[0067] It is worth noting that the diameter of the first limiting flange 151 is smaller than the diameter of the through hole. When the moving iron core 140 and the connecting rod 150 are assembled, the first limiting flange 151 is inserted into the through hole from one end of the through hole on the moving iron core 140 close to the static iron core 130, and passes through the other end of the through hole.

[0068] Further, see Figure 5 and Figure 6 The end of the through hole facing the static iron core 130 is provided with a first assembly groove 141 communicating with the through hole, and the first assembly groove 141 and the through hole form an assembly surface; the second limiting flange 152 is installed in the first assembly groove 141 and abuts against the assembly surface. The end of the static iron core 130 facing the moving iron core 140 is provided with a second assembly groove 131, one end of the first elastic member 210 is installed in the first assembly groove 141, and the other end is installed in the second assembly groove 131.

[0069] By providing the first assembly groove 141 and the second assembly groove 131 , both ends of the first elastic member 210 can be fixed, thereby improving the stability of the installation of the first elastic member 210 .

[0070] Further, see Figure 5 and Figure 6 A third assembly groove 180 is provided at one end of the through hole away from the static iron core 130, and one end of the second elastic member 230 is installed in the third assembly groove 180. The provision of the third assembly groove 180 can not only improve the installation stability of the second elastic member 230, but also guide the compression direction of the second elastic member 230 to a certain extent.

[0071] Further, see Figure 1-Figure 6The above-mentioned suction-assisted undervoltage release also includes a base 300 and a cover plate 400, which are buckled together to form a receiving cavity for fixing the release body 100; the base 300 is provided with a first avoidance opening 310 connecting the receiving cavity and the outside, and one end of the linkage push rod 220 is passed through the first avoidance opening 310 and connected to the first end of the connecting rod 150. By providing the base 300 and the cover plate 400, the release body 100 can be protected, and the buckled connection method of the base 300 and the cover plate 400 also facilitates the installation and disassembly between the base 300, the cover plate 400 and the release body 100.

[0072] Optionally, in this embodiment, a first avoidance opening 310 is formed at one end of the connecting portion 221 and is connected to the first end of the connecting rod 150 .

[0073] Optionally, continue to see Figure 1 and Figure 4 The base 300 is provided with protrusions 370 on both sides of the axial direction of the coil, and the cover plate 400 is provided with elastic buckles 410 on both sides of the axial direction of the coil frame 120, and the elastic buckles 410 are engaged with the corresponding protrusions 370. The base 300 and the cover plate 400 are connected by the engagement of the elastic buckles 410 and the protrusions 370, which has a simple structure and is easy to install and disassemble.

[0074] Furthermore, a plurality of protrusions 370 may be provided on each side of the base 300, and each protrusion 370 corresponds to an elastic buckle 410. The plurality of protrusions 370 and the elastic buckle 410 may be provided to cooperate with each other, so as to improve the connection strength between the base 300 and the cover 400.

[0075] Optionally, in this embodiment, two latching protrusions 370 are provided on each side of the base 300 for setting the latching protrusions 370 , and two elastic buckles 410 are correspondingly provided on each side of the cover 400 for setting the elastic buckles 410 .

[0076] Of course, elastic buckles 410 may be provided on both sides of the base 300 along the axial direction of the coil, and protrusions 370 may be provided on both sides of the cover plate 400 along the axial direction of the coil, and the protrusions 370 may be connected to the corresponding elastic buckles 410. The setting may be selected according to actual needs, and this application does not make specific limitations.

[0077] At present, the existing undervoltage release includes two parts: the release body and the control circuit. The release body and the control circuit components are generally installed separately inside the circuit breaker and connected through multiple lines. The installation space required for the two is large, the installation wiring is cumbersome and messy, and the installation is troublesome.

[0078] Based on the above problems, the suction-assisted undervoltage release provided in this embodiment requires a smaller current for the coil, so the controller circuit board is also smaller, and a controller circuit board installation space 360 ​​is provided on the base 300, and the controller circuit board installation space 360 ​​is used to install the controller circuit board, and the controller circuit board is electrically connected to the coil. The controller circuit board is mainly used for low-voltage sampling, information processing, etc. By integrating the controller circuit board in the base 300 and the cover plate 400, the space occupied by the release body 100 and the controller circuit board as a whole in the circuit breaker is reduced, and the installation and wiring inside the circuit breaker are simplified, thereby reducing the difficulty of installation.

[0079] Further, see Figure 1 and Figure 2 The base 300 is provided with a guide groove 320 extending in the axial direction of the coil, and the side of the linkage push rod 220 close to the base 300 is provided with a guide rib 224 extending in the axial direction of the coil, and the guide rib 224 is slidably connected to the guide groove 320 along the axial direction of the coil. Since a certain torque is generated when the rocker arm pushes the force-bearing part 222, if this torque is transmitted to the connecting rod 150, the wear of the connecting rod 150 will increase, affecting the service life of the connecting rod 150. Therefore, through the cooperation of the guide groove 320 and the guide rib 224, the torque generated by the rocker arm on the linkage push rod 220 can be eliminated to a certain extent, thereby extending the service life of the connecting rod 150.

[0080] Preferably, continue to see Figure 1 A plurality of hemispherical protrusions 321 are provided on the inner wall where the guide groove 320 contacts the guide rib 224, and the protrusions 321 contact the guide rib 224. By providing the protrusions 321 in contact with the guide rib 224, the contact area between the guide groove 320 and the guide rib 224 is reduced, thereby reducing the friction force on the linkage push rod 220 during movement, improving the smoothness of the movement of the linkage push rod 220, and also being conducive to protecting the linkage push rod 220.

[0081] Embodiment 2

[0082] This embodiment provides an auxiliary suction undervoltage release, which is substantially the same in structure as the first embodiment, and is only improved on the basis of the first embodiment. Therefore, only the differences between the two are described here, and the same structures of this embodiment and the first embodiment are not repeated here.

[0083] Specifically, Figure 7 and Figure 8As shown, the suction-assisted undervoltage releaser is respectively provided with a first connecting ear 1111 and a second connecting ear 1121 on the side of the first yoke plate 111 and the second yoke plate 112 close to the linkage push rod 220, and a connecting hole 1122 is provided on the first connecting ear 1111 and the second connecting ear 1121; the linkage push rod 220 is respectively provided with a first limiting slide groove 225 and a second limiting slide groove 226 corresponding to the first connecting ear 1111 and the second connecting ear 1121 on the side facing the releaser body 100, the first connecting ear 1111 is penetrated by a first avoidance opening 310 and is slidably set in the first limiting slide groove 225, and a second avoidance opening 330 opposite to the second connecting ear 1121 is provided on the base 300, and the second connecting ear 1121 is penetrated by a second avoidance opening 330 and is slidably set in the second limiting slide groove 226.

[0084] The linkage push rod 220 is also provided with a guide channel 227 connecting the first limiting slide groove 225 and the second limiting slide groove 226 and a guide hole 228 connecting the outside and the first limiting slide groove 225. On the base 300, a stopper 340 is provided on one side of the first avoidance opening 310.

[0085] The linkage assembly 200 also includes a guide rod 240 extending along the axial direction of the coil, the guide rod 240 is passed through the guide hole 228 and the connecting hole 1122 on the first connecting ear 1111 and the second connecting ear 1121, and one end of the guide rod 240 abuts against the stop block 340, and the other end abuts against the bottom wall of the second limiting slide groove 226.

[0086] The guide rod 240 can guide the movement of the linkage push rod 220 along the axial direction of the coil, thereby preventing the linkage push rod 220 from transmitting torque to the connecting rod 150 , thereby extending the service life of the connecting rod 150 .

[0087] Preferably, the guide rod 240 is made of metal. The guide rod 240 made of metal has a higher hardness, which can increase the strength of the linkage push rod 220 and improve the working reliability of the linkage push rod 220.

[0088] Preferably, continue to see Figure 7 The base 300 is also provided with a limit baffle 350 extending along the axial direction of the coil frame 120, and the side wall of the linkage push rod 220 is slidably attached to the limit baffle 350. The limit baffle 350 can assist the guide rod 240 in guiding the movement of the linkage push rod 220 along the axial direction of the coil, thereby improving the reliability of the movement of the linkage push rod 220.

[0089] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. Suction-assisted undervoltage release, characterized in that: include: A release body (100) comprises a magnetic yoke (110) having a first yoke plate (111) and a second yoke plate (112) arranged opposite to each other, a coil frame (120) arranged in the magnetic yoke (110), a coil sleeved outside the coil frame (120), a static iron core (130) arranged in the coil frame (120) and fixed on the second yoke plate (112), and a moving iron core (140) slidably arranged in the coil frame (120), and a connecting rod (150), wherein a first end of the connecting rod (150) is slidably arranged in the first yoke plate (111), and a second end of the connecting rod (150) is connected to the moving iron core (140); A linkage assembly (200) comprises a first elastic member (210) arranged between the moving iron core (140) and the stationary iron core (130) and a linkage push rod (220) capable of moving along the axial direction of the coil; one end of the linkage push rod (220) is connected to the first end of the connecting rod (150), and the other end of the linkage push rod (220) is provided with a force receiving portion (222) and a force applying portion (223) on opposite sides thereof; The force-bearing portion (222) is used to enable the connecting rod (150) to drive the moving iron core (140) to overcome the elastic force of the first elastic member (210) and to engage with the static iron core (130) under the drive of an external force when the current in the coil is normal; The first elastic member (210) is used to move the moving iron core (140) in a direction away from the static iron core (130) when the current in the coil weakens, and to drive the force-applying part (223) to push the traction rod of the circuit breaker through the connecting rod (150) until the circuit breaker is tripped.

2. The suction-assisted undervoltage release according to claim 1, characterized in that: A first limiting flange (151) is provided at the first end of the connecting rod (150), a connecting portion (221) is provided at one end of the linkage push rod (220), a notch (2211) is provided on the connecting portion (221) which passes through the connecting portion (221) along the axial direction of the coil and opens toward the connecting rod (150), the connecting rod (150) is slidably arranged in the notch (2211) through the opening, and the first limiting flange (151) abuts against the connecting portion (221); a second elastic member (230) is provided on the outer sleeve of the connecting rod (150), one end of the second elastic member (230) abuts against the connecting portion (221), and the other end abuts against the moving iron core (140).

3. The suction-assisted undervoltage release according to claim 2, characterized in that: The notch (2211) comprises a limiting notch (22111) and a connecting notch (22112) which are interconnected along the axial direction of the coil frame (120); the limiting notch (22111) and the connecting notch (22112) form a limiting surface (22113); the first limiting flange (151) is slidably disposed in the limiting notch (22111) by the opening and abuts against the limiting surface (22113); a portion of the connecting rod (150) close to the first limiting flange (151) is slidably disposed in the connecting notch (22112) by the opening.

4. The suction-assisted undervoltage release according to claim 1, characterized in that: The moving iron core (140) is provided with a through hole which passes through the moving iron core (140) along the axial direction of the coil, and the second end of the connecting rod (150) is provided with a second limiting flange (152), and one end of the first elastic member (210) close to the moving iron core (140) abuts against the second limiting flange (152), and the second limiting flange (152) abuts against the outer edge of the through hole.

5. The suction-assisted undervoltage release according to claim 4, characterized in that: A first assembly groove (141) communicating with the through hole is provided at one end of the through hole facing the static iron core (130), and the first assembly groove (141) and the through hole form an assembly surface; the second limiting flange (152) is installed in the first assembly groove (141) and abuts against the assembly surface; A second assembly groove (131) is provided at one end of the static iron core (130) facing the movable iron core (140); one end of the first elastic member (210) is mounted in the first assembly groove (141), and the other end is mounted in the second assembly groove (131).

6. The suction-assisted undervoltage release according to claim 1, characterized in that: The moving iron core (140) and the connecting rod (150) are an integrated structure.

7. The suction-assisted undervoltage release according to any one of claims 1 to 6, characterized in that: The suction-assisted undervoltage releaser also includes a base (300) and a cover plate (400), wherein the base (300) and the cover plate (400) are snap-fitted together to form a receiving cavity for fixing the releaser body (100); a first avoidance opening (310) connecting the receiving cavity and the outside is provided on the base (300), and one end of the linkage push rod (220) passes through the first avoidance opening (310) and is connected to the first end of the connecting rod (150).

8. The suction-assisted undervoltage release according to claim 7, characterized in that: The base (300) is provided with a guide groove (320) extending along the axial direction of the coil, and the linkage push rod (220) is provided with a guide rib (224) extending along the axial direction of the coil on a side close to the base (300), and the guide rib (224) is slidably connected to the guide groove (320) along the axial direction of the coil.

9. The suction-assisted undervoltage release according to claim 8, characterized in that: A plurality of hemispherical protrusions (321) are provided on the inner wall of the guide groove (320) in contact with the guide rib (224), and the protrusions (321) are in contact with the guide rib (224).

10. The suction-assisted undervoltage release according to claim 7, characterized in that: A first connecting ear (1111) and a second connecting ear (1121) are respectively provided on one side of the first yoke plate (111) and the second yoke plate (112) close to the linkage push rod (220), and a connecting hole (1122) is provided on each of the first connecting ear (1111) and the second connecting ear (1121); and a connecting hole (1122) is provided on one side of the linkage push rod (220) facing the release body (100). ) are provided with a first limiting slide groove (225) and a second limiting slide groove (226) corresponding to the first connecting ear (1111), the first connecting ear (1111) passes through the first avoiding opening (310) and is slidably arranged in the first limiting slide groove (225), a second avoiding opening (330) opposite to the second connecting ear (1121) is provided on the base (300), and the second connecting ear (1121) passes through the second avoiding opening (330) and is slidably arranged in the second limiting slide groove (226); The linkage push rod (220) is also provided with a guide channel (227) connecting the first limiting slide groove (225) and the second limiting slide groove (226) and a guide hole (228) connecting the outside and the first limiting slide groove (225). On the base (300), a stopper (340) is provided on one side of the first avoidance opening (310); the linkage assembly (200) also includes a guide rod (240) extending along the axial direction of the coil, the guide rod (240) is penetrated by the guide hole (228) and the connecting hole (1122) on the first connecting ear (1111) and the second connecting ear (1121), and one end of the guide rod (240) abuts against the stopper (340), and the other end abuts against the bottom wall of the second limiting slide groove (226).

11. The suction-assisted undervoltage release according to claim 10, characterized in that: The base (300) is also provided with a limit baffle (350) extending along the axial direction of the coil frame (120), and the side wall of the linkage push rod (220) is slidably attached to the limit baffle (350).

12. The suction-assisted undervoltage release according to claim 7, characterized in that: The base (300) is also provided with a controller circuit board installation space (360), and the controller circuit board installation space (360) is used to install a controller circuit board, and the controller circuit board is electrically connected to the coil.

13. The suction-assisted undervoltage release according to claim 7, characterized in that: The base (300) is provided with latching protrusions (370) on two opposite sides along the axial direction of the coil, and the cover plate (400) is provided with elastic latches (410) on two opposite sides along the axial direction of the coil frame (120), and the elastic latches (410) are latched to the corresponding latching protrusions (370).

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