CN209896018U

CN209896018U - Leakage relay

Info

Publication number: CN209896018U
Application number: CN201921242315.1U
Authority: CN
Inventors: 陈景正; 陈彦亘
Original assignee: Zhejiang Nengmei Electronic Technology Co Ltd
Current assignee: Zhejiang Yuchuang Electronic Technology Co ltd
Priority date: 2019-08-01
Filing date: 2019-08-01
Publication date: 2020-01-03
Anticipated expiration: 2029-08-01

Abstract

The utility model relates to a leakage relay, which comprises an upper cover, a middle frame and a base, wherein a reset tripping mechanism and a magnetic ring are contained in a first closed space formed by the middle frame and the base, the middle frame is integrally formed, a sinking part is arranged on the middle frame, a control circuit board is clamped between the upper cover and the middle frame, a hollow part is arranged on the control circuit board, the sinking part passes through the hollow part and enters into a second closed space formed by the upper cover and the control circuit board, the reset tripping mechanism comprises a reset electromagnetic operating mechanism, a tripping electromagnetic operating mechanism, a shell and a support piece, the tripping electromagnetic operating mechanism comprises a tripping coil and a tripping iron core, the resetting coil of the reset electromagnetic operating mechanism extends into the sinking part, the magnetic ring is arranged above the tripping electromagnetic operating mechanism, the reset tripping mechanism is arranged in the first closed space, the sinking part penetrates out of the hollow part, and the components in the reset tripping mechanism can extend into the sinking part, the thickness of the leakage relay is reduced to a certain extent.

Description

Leakage relay

Technical Field

The utility model relates to a leakage relay.

Background

In order to improve the electrical safety of an electrical appliance, a leakage relay is usually installed to detect whether the electrical appliance has a leakage phenomenon or not, and the leakage phenomenon is converted into a switching signal to drive a contact to trip and power off, so that the leakage phenomenon of a circuit and equipment and the electric shock of a human body are prevented; the reset tripping mechanism is an important actuator of the leakage relay, and the service life and the safety of the reset tripping mechanism determine whether the leakage relay can work normally. A common reset tripping mechanism comprises a reset electromagnetic operating mechanism, a tripping electromagnetic operating mechanism, a shell and a support, wherein the support is generally integrally bound with a reset iron core in the reset electromagnetic mechanism, moving contacts are arranged at two ends of the support, the interior of the reset tripping mechanism is specifically provided with a groove b as shown in figures 9-10, the support a is provided with a groove b, under the normal working state, namely the closing state, the support piece a drives the moving contact to be contacted with the static contact, a tripping iron core d in the tripping electromagnetic operating mechanism c props against the groove b, the supporting piece a and the reset iron core e are limited by the tripping iron core d, the reset iron core e can not move downwards due to the acting force of the reset spring f, the movable contact is separated from the static contact, in the using process, however, the tripping iron core d is easy to incline the top of the supporting piece a under the closing state, so that the reset iron core e is inclined; when the tripping electromagnetic operating mechanism h works, the tripping iron core d is separated from the groove b, and the movable contact and the fixed contact cannot be separated due to the inclination of the resetting iron core e, so that the resetting tripping mechanism with the structure has short service life and insufficient safety, easily causes unnecessary economic loss, and even can endanger personal safety.

Disclosure of Invention

In view of the deficiencies in the prior art, the utility model provides a higher, the longer, the more compact electric leakage relay of structure of life of security.

In order to achieve the above object, the present invention adopts a leakage relay, which comprises an upper cover, a middle frame and a base, wherein the middle frame and a first closed space formed by the base accommodate a reset tripping mechanism and a magnetic ring, the middle frame is formed integrally, the middle frame extends to the outside of the first closed space to form a sunken portion, a control circuit board is sandwiched between the upper cover and the middle frame, a hollow portion is arranged on the control circuit board, the sunken portion passes through the hollow portion to enter a second closed space formed by the upper cover and the control circuit board, the reset tripping mechanism comprises a reset electromagnetic operating mechanism, a tripping electromagnetic operating mechanism, a housing and a supporting member, the movement track of the reset electromagnetic operating mechanism is in a perpendicular relation with the movement track of the tripping electromagnetic operating mechanism, the movement track of the reset electromagnetic operating mechanism is perpendicular to the base, a reset coil of the reset electromagnetic operating mechanism extends into the sunken part, and a magnetic ring is arranged above the tripping electromagnetic operating mechanism; the tripping electromagnetic operating mechanism comprises a tripping coil and a tripping iron core, the resetting electromagnetic operating mechanism comprises a resetting coil and a resetting iron core, the resetting iron core is longitudinally fixed at the central position of the supporting piece, the resetting iron core is sleeved with a resetting elastic piece, the resetting elastic piece can form limit by the supporting piece, the supporting piece fixed with the resetting iron core is longitudinally placed in the shell and can do up-and-down reciprocating motion in the shell, the tripping iron core is transversely placed in the shell, one end of the tripping iron core extends to one side of the supporting piece fixed with the resetting iron core, the other end of the tripping iron core is provided with a tripping resetting piece and can form press with the shell by the tripping resetting piece, the tripping coil and the resetting coil are respectively arranged on the shell and respectively form corresponding to the tripping iron core and the resetting iron core, and the resetting iron core comprises a movable iron core and a static iron core, the movable iron core is connected to the support piece, the static iron core is fixed above the movable iron core, the tripping iron core is sleeved at one end close to the support piece and is limited by a linkage locking plate, the linkage locking plate extends into the side shell where the reset iron core is placed, a penetrating limiting hole is further formed in the linkage locking plate, the movable iron core located in the shell penetrates through the penetrating limiting hole, a limiting groove is further formed in the movable iron core, the movable iron core penetrating through the linkage locking plate is matched with a hole wall of the penetrating limiting hole in the linkage locking plate through the limiting groove formed in the movable iron core and through contact of the movable iron core and the static iron core to form longitudinal limiting of the movable iron core, and the reset elastic piece limited by the support piece is located below the linkage locking plate extending to the shell.

The beneficial effect of above-mentioned structure lies in: through the structural design, the reset tripping mechanism is arranged in the first closed space, the sunken part penetrates out of the hollow part, and parts in the reset tripping mechanism can penetrate into the sunken part, so that the thickness of the leakage relay is reduced to a certain extent; in the existing reset tripping mechanism, a groove is formed in a supporting piece, in a normal working state, namely, a switching-on state, the supporting piece integrally bound with a reset iron core drives a moving contact to be contacted with a fixed contact above the moving contact, and the trip iron core is propped against the groove on the supporting piece, so that the situation that the trip iron core moves downwards due to the action force of a trip spring cannot occur due to the limit of the trip iron core when the supporting piece is connected with the reset iron core, and the moving contact is separated from the fixed contact, but in the serial combination in the switching-on state, the trip iron core propped against the supporting piece has certain possibility of propping up the supporting piece to incline, meanwhile, because the supporting piece and the reset iron core are integrated, if the supporting piece inclines, the trip iron core can incline, if the inclination occurs, when the tripping or tripping and resettable mechanism needs, even though the tripping iron core withdraws from the groove and is disengaged from the supporting piece, the supporting piece and the tripping iron core are inclined, so that the disengagement between the moving contact and the static contact cannot be realized, and therefore, the tripping or tripping and resettable mechanism can also be realized, when the mechanism is used in an electric product, if the condition occurs, the electric product has certain possibility that the tripping and tripping cannot be normally realized, the utility model adopts the technical scheme that the tripping iron core is disassembled into the mechanism consisting of the moving iron core and the static iron core, and simultaneously adopts the technical scheme that the tripping iron core close to one side of the supporting piece is connected with the linkage locking plate on the resetting tripping mechanism, the tripping iron core can form linkage with the linkage locking plate, and the other end of the linkage locking plate extends into the shell provided with the moving iron core involved in the tripping iron core, and simultaneously the linkage locking plate is provided with corresponding hole sites, the working principle is that the tripping iron core can be linked with the linkage locking plate, the tripping iron core is provided with a tripping reset piece relative to the other end of the installation locking plate, the movable iron core installed in the shell penetrates through the hole site on the locking plate, the hole site related to the hole site on the linkage locking plate linked with the tripping iron core can be always propped against the outside of the movable iron core due to the existence of the tripping reset piece, when the movable iron core and the static iron core are matched, the resetting elastic piece sleeved on the movable iron core is compressed, the hole site related to the hole site on the linkage locking plate linked with the tripping iron core just slides into the limiting groove, thereby realizing the limiting of the movable iron core, and the resetting tripping mechanism is used in certain electric products, when the electric equipment bears strong current, lightning stroke or other unknown conditions, one side of a tripping iron core in a reset tripping mechanism in the electric product, which is provided with a tripping resetting piece, generates magnetic force under the interaction of a tripping coil and external force, so that the tripping iron core moves towards the other side provided with a linkage locking plate and can drive the linkage locking plate to correspondingly move, the hole wall clamped in a limiting groove is separated from the limiting groove, and the constraint force of a compressed reset elastic piece disappears, so that the movable iron core is disengaged from the stationary iron core due to the resilience characteristic of the reset elastic piece, and the support piece integrated with the movable iron core also moves, so that a movable contact fixed on the support piece is disengaged from a static contact in the electric product, and the electric product is tripped and tripped; wherein through the linkage between add of linkage locking plate and other parts can make the utility model relates to a stress balance of support piece both sides, simultaneously because linkage locking plate during operation only bears bidirectional push-and-pull force for the difficult wearing and tearing of linkage locking plate make tripping device that resets from this life obtain improving greatly, has also guaranteed simultaneously that the security of power consumption product at the use has obtained improving greatly, simultaneously the utility model relates to a mechanical life who cooperates between movable iron core and the quiet iron core improves 4 ten thousand mechanical life that now relate to from original 1 ten thousand mechanical life in the tripping device that resets.

Particularly, the control circuit board is provided with an incoming line copper piece and an outgoing line copper piece for leading in phase current, one end of the incoming line copper piece is fixedly connected to the control circuit board, the other end of the incoming line copper piece is led out of the outer side of the leakage relay, and a current input pin perpendicular to the control circuit board is formed in the center of the incoming line copper piece; one end of the outgoing copper piece is fixedly connected to the magnetic ring, and the other end of the outgoing copper piece is led out of the outer side of the leakage relay. Through the setting of above structure, for control circuit board access phase current, and the well frame is hugged closely to the copper spare, can not additionally increase leakage relay's volume.

Particularly, an annular groove is formed in one end, extending to the supporting piece, of the tripping iron core, the linkage locking plate is sleeved on the end, provided with the U-shaped groove, of the tripping iron core, and the linkage locking plate is matched with the tripping iron core through clamping of the U-shaped groove and the annular groove; wherein set up the U-shaped groove on seting up ring channel and locking plate on the dropout iron core, the cooperation through ring channel and U-shaped groove makes to be connected between dropout iron core and the locking plate, and realizes spacing to moving the iron core through the mating holes and the spacing groove that moves and relate to on the iron core, makes from this the utility model discloses an overall arrangement becomes more reasonable.

Particularly, an L-shaped included angle is formed between one end of the linkage locking plate matched with the tripping iron core and the other end matched with the reset iron core; through the above, the matching reasonability and the production convenience among the locking plate, the tripping iron core and the movable iron core are greatly improved.

Particularly, the aperture of the penetrating limiting hole on one side close to the tripping iron core, which is arranged on the linkage locking piece, is smaller than the shaft diameter of the movable iron core, and the aperture on one side close to the tripping iron core can be clamped and matched in the limiting groove; through the setting, can guarantee to move the iron core about normally, when moving, when quiet iron core cooperation, wear to put spacing hole on the locking plate and go into foretell spacing inslot through the one end card that is close to the dropout iron core, constitute from this and move the iron core and carry on spacingly, and the diameter of a shaft that is less than moving the iron core that sets up the bore of the one end of mating holes dropout iron core, can make the locking plate more reliable with the cooperation that moves the iron core.

Particularly, a metal sleeve is further arranged between the reset iron core arranged in the shell and the shell, and the metal sleeve is limited at the shell; through the arrangement, the reset iron core is made of soft magnetic materials, meanwhile, the coil corresponding to the reset iron core on the shell can generate magnetic force under the power-on state, the reset iron core can have the function similar to a magnet due to the induction of the magnetic environment, meanwhile, the metal sleeve is a copper pipe, when the reset tripping mechanism is used in certain electric products and tripping and separating are needed, the movable iron core in the reset iron core moves reversely to the position on one side of the static iron core, the reset iron core generates stress due to the influence of the magnetic force of the coil, when the copper pipe is sleeved outside the reset iron core, when the reset iron core moves, the copper pipe can enable the magnetic force lines related to the magnetic force generated by the coil to generate cutting motion, when the movable iron core moves in the copper pipe, the stress can be generated, and the coil can generate magnetic force under the power-on state in the electric products, the iron core becomes magnet through the response, and the magnetic line of force then can remove to produce certain hindrance to the iron core that resets, when the iron core reachs in the middle of the copper pipe, the cutting magnetic line of force is the most, and acceleration is also the minimum, but after having crossed the centre, the magnetic line of force of cutting will reduce gradually, also makes the resistance that the iron core that resets received also more and more littleer, after involving the resistance and reducing, can make the speed that moves about the iron core that moves about that relates to in the iron core that resets accelerate, and then make the realization of tripping device that resets trip to.

In particular, the tripping reset piece is a tower-shaped spring; the existing tripping spring related to the movable iron core is generally a common cylindrical spring, but the compression ratio related to the compression is generally 1:2, but the common cylindrical spring is replaced by a tower-shaped spring, thereby the height is consistent before compression, but the height of the tower spring after compression is far less than that of the common cylindrical spring, so that if the tower spring is adopted, when the movable iron core and the static iron core are contacted, because the matching height between the movable iron core and the static iron core and between the movable contact and the static contact is limited, but the common cylindrical spring is replaced by the tower-shaped spring, the distance between the support member compressed by the tower-shaped spring and the shell is reduced, meanwhile, the height of the compressed spring is reduced, a proper amount of the supporting piece or the shell corresponding to the supporting piece can be thickened, the distance between the two is suitable for the tower-shaped spring to use, and the strength of the reset tripping mechanism can be improved through the setting.

In particular, the return elastic member is a return spring.

Drawings

Fig. 1 is an exploded view of the leakage relay of the present invention;

fig. 2 is a perspective view of the reset tripping mechanism of the utility model;

fig. 3 is a back perspective view of the reset trip mechanism of the present invention;

fig. 4 is a semi-sectional view of the reset trip mechanism after tripping;

fig. 5 is a semi-sectional view of the reset tripping mechanism after closing;

FIG. 6 is a schematic perspective view of the integrated movable core and supporting member of the present invention;

fig. 7 is a perspective view of the locking plate of the present invention;

fig. 8 is a schematic perspective view of the trip core of the present invention;

fig. 9 is a semi-sectional view of a prior art reset trip mechanism after tripping;

fig. 10 is a semi-sectional view of a prior art reset trip mechanism after closing;

Detailed Description

As shown in fig. 1-8, a leakage relay according to a specific embodiment of the present invention includes an upper cover 1, a middle frame 2 and a base 3, a reset tripping mechanism 4 and a magnetic ring 5 are accommodated in a first closed space formed by the middle frame 2 and the base 3, the middle frame 2 is integrally formed, a sinking portion 21 extends from the middle frame 2 to the outside of the first closed space, a control circuit board 6 is sandwiched between the upper cover 1 and the middle frame 2, a hollow portion 61 is disposed on the control circuit board 6, the sinking portion 21 passes through the hollow portion 61 to enter a second closed space formed by the upper cover 1 and the control circuit board 6, the reset tripping mechanism 4 includes a reset electromagnetic operating mechanism 41, a tripping electromagnetic operating mechanism 42, a housing 43 and a support 44, a movement track of the reset electromagnetic operating mechanism 41 is perpendicular to a movement track of the tripping electromagnetic operating mechanism 42, the movement track of the reset electromagnetic operating mechanism 41 is perpendicular to the base 3, the trip electromagnetic operating mechanism 42 comprises a trip coil 421 and a trip iron core 422, the reset electromagnetic operating mechanism 41 comprises a reset coil 411 and a reset iron core 412, the reset coil 411 extends into the sunken part 21, and the magnetic ring 5 is arranged above the trip electromagnetic operating mechanism 42; the reset iron core 412 is longitudinally fixed at the center of the support member 44, the reset iron core 412 is sleeved with a reset elastic member 413, the reset elastic member 413 can be limited by the support member 44, the support member 44 fixed with the reset iron core 412 is longitudinally placed in the housing 43 and can make up-and-down reciprocating motion in the housing 43, the trip iron core 422 is transversely placed in the housing 43, one end of the trip iron core 422 extends to one side of the support member 44 fixed with the reset iron core 412, the other end of the trip iron core 422 is provided with a trip reset member 423 and can form pressing with the housing 43 by the trip reset member 423, the trip coil 421 and the reset coil 411 are respectively arranged on the housing 43 and respectively correspond to the trip iron core 422 and the reset iron core 412, the reset iron core 412 comprises a movable iron core 414 and a stationary iron core 415, the movable iron core 414 is connected to the support member 44, the static iron core 415 is fixed above the movable iron core 414, the trip iron core 422 is sleeved and limited at one end close to the support 44, the linkage locking plate 45 extends into the side shell 44 on which the reset iron core 412 is placed, a penetrating limiting hole 451 is further formed on the linkage locking plate 45, the movable iron core 414 positioned in the shell 44 penetrates through the penetrating limiting hole 451, a limiting groove 416 is further formed on the movable iron core 414, the movable iron core 414 penetrating through the linkage locking plate 45 is matched with the hole wall of the penetrating limiting hole 451 on the linkage locking plate 45 through the limiting groove 416 formed on the movable iron core 414 through the contact between the movable iron core and the static iron core to form the longitudinal limiting of the movable iron core 414, and the reset elastic member 413 limited by the support 44 is positioned below the linkage locking plate 45 extending to the shell 44.

An incoming line copper part 62 and an outgoing line copper part 63 for leading in phase current are arranged on the control circuit board 6, one end of the incoming line copper part 62 is fixedly connected to the control circuit board 6, the other end of the incoming line copper part is led out of the outer side of the leakage relay, and a current input pin 64 perpendicular to the control circuit board 6 is formed in the center of the incoming line copper part 62; one end of the outgoing copper piece 63 is fixedly connected to the magnetic ring 5, and the other end of the outgoing copper piece is led out of the outer side of the leakage relay.

An annular groove 4221 is formed in one end of the tripping iron core 422 extending to the support piece 44, the end of the tripping iron core 422 sleeved with the linkage locking plate 45 forms a U-shaped groove 452, and the linkage locking plate 45 is matched with the tripping iron core 422 through clamping of the U-shaped groove 452 and the annular groove 4221. An L-shaped included angle is formed between one end of the linkage locking piece 45 matched with the tripping iron core 422 and the other end matched with the reset iron core 412. The aperture of the penetrating limiting hole 451 on the linkage locking plate 45 at the side close to the trip iron core 422 is smaller than the shaft diameter of the movable iron core 414, and the aperture at the side close to the trip iron core 422 can be clamped into and matched with the limiting groove 416.

A metal sleeve 47 is further included between the reset iron core 412 placed in the housing 43 and the housing 43, and the metal sleeve 47 forms a limit at the housing 43;

the trip restoring member 423 is a tower-shaped spring, and the restoring elastic member 413 is a restoring spring.

Claims

1. An electrical leakage relay characterized by: the leakage relay comprises an upper cover, a middle frame and a base, wherein a first closed space formed by the middle frame and the base is internally provided with a reset tripping mechanism and a magnetic ring, the middle frame is integrally formed, the middle frame extends to the outer side of the first closed space and is provided with a sinking part, a control circuit board is clamped between the upper cover and the middle frame, the control circuit board is provided with a hollowed part, the sinking part penetrates through the hollowed part to enter a second closed space formed by the upper cover and the control circuit board, the reset tripping mechanism comprises a reset electromagnetic operating mechanism, a tripping electromagnetic operating mechanism, a shell and a supporting piece, the motion track of the reset electromagnetic operating mechanism is vertical to the motion track of the tripping electromagnetic operating mechanism, the motion track of the reset electromagnetic operating mechanism is vertical to the base, and the tripping electromagnetic operating mechanism comprises a tripping coil and a tripping iron core, the reset electromagnetic operating mechanism comprises a reset coil and a reset iron core, the reset coil extends into the sunken part, and the magnetic ring is arranged above the tripping electromagnetic operating mechanism; the reset iron core is longitudinally fixed at the central position of the support piece, the reset iron core is sleeved with a reset elastic piece, the reset elastic piece can be limited by the support piece, the support piece fixed with the reset iron core is longitudinally arranged in the shell and can do up-and-down reciprocating motion in the shell, the tripping iron core is transversely arranged in the shell, one end of the tripping iron core extends to one side of the support piece fixed with the reset iron core, the other end of the tripping iron core is provided with a tripping reset piece and can form abutting pressure with the shell by the tripping reset piece, the tripping coil and the reset coil are respectively arranged on the shell and respectively form corresponding with the tripping iron core and the reset iron core, the reset iron core comprises a movable iron core and a static iron core, the movable iron core is connected on the support piece, the static iron core is fixed above the movable iron core, and the tripping iron core is sleeved at one end close to the support piece and, the linkage locking plate extends into the side shell with the reset iron core, a penetrating limiting hole is formed in the linkage locking plate, the movable iron core located in the shell penetrates through the penetrating limiting hole, a limiting groove is formed in the movable iron core, the movable iron core penetrating through the linkage locking plate is in contact with the movable iron core and the static iron core, the limiting groove formed in the movable iron core is matched with the wall of the penetrating limiting hole in the linkage locking plate to form longitudinal limiting of the movable iron core, and the reset elastic piece limited by the supporting piece is located below the linkage locking plate extending to the shell.

2. A residual current relay according to claim 1, characterized in that: the control circuit board is provided with an incoming line copper piece and an outgoing line copper piece for leading in phase current, one end of the incoming line copper piece is fixedly connected to the control circuit board, the other end of the incoming line copper piece is led out of the outer side of the leakage protection module, and a current input pin perpendicular to the control circuit board is formed in the center of the incoming line copper piece; one end of the outgoing copper piece penetrates through the magnetic ring, and the other end of the outgoing copper piece is led out of the outer side of the leakage protection module.

3. A residual current relay according to claim 1, characterized in that: the tripping iron core is provided with an annular groove at one end extending to the supporting piece, the linkage locking piece is sleeved on the tripping iron core, the end of the linkage locking piece, which is provided with a U-shaped groove, is clamped with the annular groove, and the linkage locking piece is matched with the tripping iron core.

4. A residual current relay according to claim 1 or 3, characterized in that: and an L-shaped included angle is formed between one end of the linkage locking plate matched with the tripping iron core and the other end of the linkage locking plate matched with the reset iron core.

5. A residual current relay according to claim 1 or 3, characterized in that: the linkage locking piece is provided with a penetrating limiting hole, the aperture of the penetrating limiting hole on one side close to the tripping iron core is smaller than the shaft diameter of the movable iron core, and the aperture of the penetrating limiting hole on one side close to the tripping iron core can be clamped and matched with the limiting groove.

6. A residual current relay according to claim 4, characterized in that: the linkage locking plate is provided with a penetrating limiting hole, the aperture of the penetrating limiting hole close to one side of the tripping iron core is smaller than the shaft diameter of the movable iron core, and the aperture close to one side of the tripping iron core can be clamped into and matched with the limiting groove.

7. A residual current relay according to claim 1 or 3, characterized in that: the reset iron core is arranged in the shell, a metal sleeve is arranged between the reset iron core and the shell, and the metal sleeve is limited at the position of the shell.

8. A residual current relay according to claim 1 or 3, characterized in that: the tripping reset piece is a common cylindrical spring.

9. A residual current relay according to claim 1 or 3, characterized in that: the reset elastic piece is a tower-shaped spring.