CN113675052A - Double-contact actuating mechanism of switching device and circuit breaker - Google Patents

Abstract

The invention provides a double-contact actuating mechanism and a breaker of a switching device, comprising: a housing; the operating mechanism comprises a contact support and a lock catch, the contact support is arranged on the shell in a resetting pivot mode through a hinge structure and is located at the communication position of the two assembling cavities, two limiting clamping grooves are symmetrically formed in two opposite sides of the arc isolating body, the lock catch comprises an arc isolating cover body in an arc plate shape, an auxiliary arc isolating plate is arranged on one side of the arc isolating cover body in the circumferential direction and used for shielding an arc leakage seam which occurs between the arc isolating cover body and the arc isolating body when the arc isolating cover body rotates relative to the arc isolating body; the contact mechanism comprises two moving contacts. The invention can effectively avoid the phenomenon of electric arc cross-flow between the two assembly cavities, greatly improve the assembly convenience between the contact support and the moving contact, improve the compactness of parts of the switching device and reduce the overall size of the switching device.

Description

Double-contact actuating mechanism of switching device and circuit breaker

Technical Field

The invention relates to the technical field of switching appliances, in particular to a double-contact actuating mechanism of a switching appliance and a circuit breaker.

Background

The circuit breaker is a switching device capable of closing, carrying, and opening/closing a current under a normal circuit condition and a current under an abnormal circuit condition within a prescribed time. The circuit breakers are divided into high-voltage circuit breakers and low-voltage circuit breakers according to the application range, the high-voltage and low-voltage boundary lines are relatively vague, and the circuit breakers above 3kV are generally called high-voltage electric appliances.

The circuit breaker can be used for distributing electric energy, starting an asynchronous motor infrequently, protecting a power supply circuit, the motor and the like, and automatically cutting off a circuit when faults such as serious overload, short circuit, undervoltage and the like occur, and the function of the circuit breaker is equivalent to the combination of a fuse type switch, an over-under-heat relay and the like. Furthermore, no parts need to be changed after breaking the fault current.

However, the conventional circuit breaker is not small enough in overall size, complicated in internal structure, and not high in mechanism compactness.

Disclosure of Invention

In view of the above disadvantages of the prior art, the technical problem to be solved by the present invention is to provide a dual-contact actuating mechanism and a circuit breaker for a switching device, which can effectively avoid the phenomenon of arc cross between two assembly cavities, greatly improve the assembly convenience between a contact support and a moving contact, improve the compactness of components of the switching device, and reduce the overall size of the switching device.

In order to solve the above technical problem, the present invention provides a dual contact actuating mechanism for a switching device, including:

the inner cavity of the shell is divided into two assembling cavities which are arranged side by side;

the operating mechanism comprises a contact support and a lock catch, the contact support is pivotally arranged on the shell in a resettable mode through a hinge structure and is located at the communication position of the two assembling cavities, the contact support comprises a flat-plate-shaped arc isolating body, two limiting clamping grooves are symmetrically formed in two opposite sides of the arc isolating body, the lock catch comprises an arc-plate-shaped arc isolating cover body, the arc isolating cover body is pivotally arranged on the arc isolating body in a resettable mode and is located at the edge, close to a short circuit release, of the arc isolating body, an auxiliary arc isolating plate is arranged on one side of the circumference of the arc isolating cover body, and the auxiliary arc isolating plate is used for shielding an arc leaking seam which occurs between the arc isolating cover body and the arc isolating body when the arc isolating cover body rotates relative to the arc isolating body;

the contact mechanism comprises two moving contacts, and the two moving contacts are correspondingly arranged in the two assembling cavities and correspondingly positioned in the two limiting clamping grooves.

Preferably, the moving contact is provided with a swing restraining hole, the hinge structure can be slidably arranged in the swing restraining hole along the length direction of the swing restraining hole in a penetrating manner, and a buffer reset piece for driving the moving contact to swing towards the corresponding fixed contact is arranged between the hinge structure and the moving contact; when the hinged structure is abutted against one end of the swing constraint hole, the movable contact swings to a first swing limit position relative to the arc isolating body, and when the hinged structure is abutted against the other end of the swing constraint hole, the movable contact swings to a second swing limit position relative to the arc isolating body.

Preferably, the moving contact includes a moving contact body, a limiting protrusion and a contacting portion, the moving contact body is connected to the arc isolating body in a pivoting manner in a resettable manner, the limiting protrusion is integrally formed at the edge of the moving contact body and can be abutted to the limiting clamping groove in a swinging manner, and the contacting portion is formed at the edge of the moving contact body and is matched with the corresponding static contact position.

Preferably, the buffering piece that resets is the torsional spring structure, and the buffering piece that resets includes buffering torsional spring body, first buffering stabilizer blade and second buffering stabilizer blade, and articulated structure is located to buffering torsional spring body cover, and first buffering stabilizer blade butt is in moving contact body and spacing bellied linking department, and second buffering stabilizer blade butt is in moving contact body and the linking department that touches the portion of connecing.

Preferably, a V-shaped first clamping interface is arranged at the joint of the moving contact body and the limiting protrusion, a V-shaped second clamping interface is arranged at the joint of the moving contact body and the contacting part, and an opening angle corresponding to the second clamping interface is larger than that corresponding to the first clamping interface; the first buffering support leg is positioned and hooked on the first clamping interface, and the second buffering support leg is slidably hooked on the second clamping interface.

Preferably, the hinge structure includes coaxially arranged in proper order first articulated shaft, first hinge hole, second articulated shaft and second hinge hole, and first articulated shaft integrated into one piece is in an inside wall of shell, and first hinge hole is seted up in a lateral wall of separating the arc body and is pegged graft the cooperation with first articulated shaft, and second articulated shaft integrated into one piece is in another lateral wall of separating the arc body, and the second hinge hole is seted up in another inside wall of shell and is pegged graft the cooperation with the second articulated shaft.

Preferably, a lateral wall of separate arc body is equipped with along hinge structure's radial extension's rotation backstop muscle, hinge structure's C type ring is still located including the cover to the hasp, and the both ends correspondence of C type ring is connected with the separate arc cover body through two rotation spacing strips, and two rotation spacing strips are all along hinge structure's radial extension and lie in and rotate the backstop muscle along hinge structure circumference's relative both sides.

Preferably, the hinge structure is provided with an assembly clamping protrusion, and the inner peripheral wall of the C-shaped ring is provided with an assembly notch matched with the assembly clamping protrusion.

Preferably, be equipped with the wear-resisting muscle of C type on the lateral wall of separating the arc body, the wear-resisting muscle of C type is coaxial arrangement in hinge structure's periphery department, and the wear-resisting muscle of C type equals along hinge structure axial size to rotate the backstop muscle, and the wear-resisting muscle of C type is greater than the axial size of C type ring along hinge structure axial size.

The invention also provides a circuit breaker, which comprises the double-contact action mechanism of the switching device.

As described above, the double-contact actuating mechanism and the circuit breaker of the switching apparatus according to the present invention have the following advantageous effects: in the invention, the contact support comprises a flat-plate-shaped arc isolating body, so that an electric arc generated by one assembly cavity can be effectively prevented from jumping into the other assembly cavity; more importantly, the hasp is including being the arc shield body of arc plate form, and the arc shield body can reset the ground pivot and locate the arc body that separates, and one side of arc shield body circumference is equipped with supplementary arc baffle, can shelter from the electric arc crack that appears between the arc shield body and the arc body when the arc shield body rotates for the arc body that separates like this to further avoid the electric arc that one of them assembly chamber produced to scurry another assembly intracavity. Meanwhile, the arc isolating cover body is positioned at the edge of the arc isolating body close to the short-circuit release, so that electric arcs are prevented from being generated between the moving contact and the short-circuit release. In addition, the relative bilateral symmetry of separating the arc body is equipped with two spacing draw-in grooves, and two moving contacts correspond to be arranged in two assembly intracavity and correspond to be located two spacing draw-in grooves, can be convenient for assemble every moving contact to the relative both sides of separating the arc body like this, make the assembly between contact support and the moving contact more convenient. Therefore, the double-contact action mechanism of the switch electric appliance can effectively avoid the phenomenon of electric arc cross between the two assembly cavities, greatly improve the assembly convenience between the contact support and the moving contact, improve the compactness of parts of the switch electric appliance and reduce the overall size of the switch electric appliance.

Drawings

Figure 1 shows a schematic diagram of a circuit breaker of the present invention;

FIG. 2 shows a schematic view of a base of the housing;

FIG. 3 is a schematic view of a cover plate of the housing;

FIG. 4 is a schematic view of a middle partition of the housing;

FIG. 5 is a schematic view of the assembly of the base and the intermediate partition;

FIG. 6 is a schematic view showing an internal structure of an L-pole mounting chamber;

FIG. 7 is a schematic view showing the internal structure of an N-pole assembling chamber;

fig. 8 shows a schematic view of the assembly of the operating mechanism and the movable contact;

fig. 9 is a schematic view showing the assembly of the contact support, the latch and the movable contact;

FIG. 10 is a schematic view of a contact mount;

FIG. 11 is a schematic view of the latch;

FIG. 12 is a schematic view of the handle;

figure 13 shows a schematic view of a movable contact;

fig. 14 shows an assembly schematic of the yoke and the short circuit release;

FIG. 15 is a schematic view of an N-pole integrated plate;

FIG. 16 is a schematic view of an L-pole arc spacer;

fig. 17 is a schematic view of an N-pole arc barrier.

Description of the element reference numerals

1 outer cover

11 base

12 middle partition board

13 cover plate

2 Assembly Chamber

21L pole assembly cavity

211L pole arc striking chamber

212L pole arc extinguishing chamber

213L pole flash barrier

213a L pole arc-striking long slot

22N pole assembling cavity

221N pole arc striking chamber

222N pole arc extinguishing chamber

223N pole flash barrier

223a N pole arc starting long groove

23L pole arc chute assembly

24 arc-extinguishing long rib

3 operating mechanism

31 contact support

311 arc insulation body

311a first limit notch

311b second limit notch

312 limiting clamping groove

312a card slot side wall

313 sliding chute

313a locking groove portion

313b trip slot part

313c chute side wall

313d avoidance port

314 reinforcing rib

315 rotation stop rib

316C type wear-resistant rib

32 lock catch

321 arc-isolating cover body

322 auxiliary flash barrier

323C type ring

323a assembly notch

324 rotation limiting strip

325 cover body claw

325a abutting portion

325b coming-off preventing part

326 compression bar arm

326a arc-shaped locking notch

33 hinge structure

331 first hinge shaft

332 first hinge hole

333 second articulated shaft

334 second hinge hole

335 assembling clamp

34 buffer reset piece

341 buffer torsion spring body

342 first buffer leg

343 second buffer leg

35 handle

351 handle body

352 handle clamping groove

353 annular assembling groove

36 connecting rod

361 connecting end

362 Top end

37 linkage reset piece

371 linkage torsion spring body

372 first linkage leg

373 second linkage leg

4 short-circuit release

5 contact mechanism

51 moving contact

511 swinging restriction hole

512 moving contact body

513 limiting bulge

514 contact part

515 first card interface

516 second card interface

52 static contact

521L pole static contact

522N pole static contact

6 magnetic yoke

61 magnetic gathering frame part

611 first supporting board part

611a hold the notch

612 aerial plate part

613 second support plate part

613a clamping through hole

62 transitional joint

63L pole static contact mounting part

64 first L-pole arc striking part

65 second L-pole arc striking part

66L arc-extinguishing plate part

7N pole integrated plate

71 terminal board part

72 inclined joint part

73 conductive plate part

74N pole static contact mounting part

75 first N-pole arc striking part

76 second N-pole arc striking part

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.

It should be understood that the structures, ratios, sizes, and the like shown in the drawings are only used for matching the disclosure of the present disclosure, and are not used for limiting the conditions that the present disclosure can be implemented, so that the present disclosure is not limited to the technical essence, and any structural modifications, ratio changes, or size adjustments should still fall within the scope of the present disclosure without affecting the efficacy and the achievable purpose of the present disclosure. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.

First, as shown in fig. 1 to 11, the present invention provides a double-contact operating mechanism for a switching device, including:

the device comprises a shell 1, wherein the inner cavity of the shell 1 is divided into two assembly cavities 2 which are arranged side by side;

the operating mechanism 3, the operating mechanism 3 includes the contact holder 31 (refer to fig. 10) and the lock catch 32 (refer to fig. 11), the contact holder 31 is resettably pivoted to the housing 1 through a hinge structure 33 and is located at the communication position of the two assembly cavities 2, the contact holder 31 includes a flat-plate-shaped arc isolating body 311, two limit slots 312 are symmetrically arranged at two opposite sides of the arc isolating body 311, the lock catch 32 includes an arc isolating cover 321 in an arc plate shape, the arc isolating cover 321 is resettably pivoted to the arc isolating body 311 and is located at the edge of the arc isolating body 311 close to a short-circuit release 4, one side of the arc isolating cover 321 in the circumferential direction is provided with an auxiliary arc isolating plate 322, and the auxiliary arc isolating plate 322 is used for shielding an arc leak generated between the arc isolating cover 321 and the arc isolating body 311 when the arc isolating cover 321 rotates relative to the arc isolating body 311;

the contact mechanism 5 (see fig. 6 and 7), the contact mechanism 5 includes two movable contacts 51 (see fig. 13), and the two movable contacts 51 are correspondingly disposed in the two assembly cavities 2 and correspondingly positioned in the two limit card slots 312.

In the present invention, the contact holder 31 includes the arc isolating body 311 in a flat plate shape, so that the arc generated in one of the assembly cavities 2 can be effectively prevented from flowing into the other assembly cavity 2; more importantly, the latch 32 includes an arc-shaped arc-isolating cover 321, the arc-isolating cover 321 is pivotally disposed on the arc-isolating body 311 in a resettable manner, and an auxiliary arc-isolating plate 322 is disposed on one side of the arc-isolating cover 321 in the circumferential direction, so that an arc leakage seam between the arc-isolating cover 321 and the arc-isolating body 311 when the arc-isolating cover 321 rotates relative to the arc-isolating body 311 can be shielded, and thus, an arc generated by one of the assembly cavities 2 is further prevented from flowing into the other assembly cavity 2. Meanwhile, the arc blocking cover 321 is located at the edge of the arc blocking body 311 close to a short-circuit release 4, so as to prevent an arc from being generated between the movable contact 51 and the short-circuit release 4. In addition, the relative bilateral symmetry of separating arc body 311 is equipped with two spacing draw-in grooves 312, and two moving contacts 51 correspond arrange in two assembly chamber 2 and correspond and be located two spacing draw-in grooves 312, can be convenient for assemble every moving contact 51 to the relative both sides of separating arc body 311 like this, make the assembly between contact support 31 and the moving contact 51 more convenient. Therefore, the double-contact action mechanism of the switch electric appliance can effectively avoid the phenomenon of electric arc cross between the two assembly cavities 2, greatly improve the assembly convenience between the contact support 31 and the moving contact 51, improve the compactness of parts of the switch electric appliance and reduce the overall size of the switch electric appliance.

As shown in fig. 9 and 13, in order to make the movable contact 51 flexibly contact with the corresponding fixed contact 52, the movable contact 51 is provided with a swing constraining hole 511, the hinge structure 33 is slidably inserted into the swing constraining hole 511 along the length direction of the swing constraining hole 511, and a buffer reset member 34 for driving the movable contact 51 to swing towards the corresponding fixed contact 52 is arranged between the hinge structure 33 and the movable contact 51; when the hinge structure 33 abuts against one end of the swing restriction hole 511, the movable contact 51 swings to a first swing limit position relative to the arc insulation body 311, and when the hinge structure 33 abuts against the other end of the swing restriction hole 511, the movable contact 51 swings to a second swing limit position relative to the arc insulation body 311. The swing restricting hole 511 may be a waist-shaped hole structure or an arc-shaped hole structure. When the contact device is used, the contact support 31 rotates under the action of a driving force to drive the movable contact 51 to swing towards the corresponding fixed contact 52 until the movable contact 51 abuts against the corresponding fixed contact 52, and at this time, the contact support 31 can further rotate relative to the shell 1 by a preset angle (the preset angle is generally smaller). If the contact support 31 continues to rotate relative to the housing 1, the movable contact 51 swings around the position of the limiting clamping groove 312 as a swing center and under the constraint of the swing constraint hole 511, and the elastic potential energy of the buffering reset piece 34 is increased, so that the movable contact 51 is more tightly abutted to the corresponding fixed contact 52. If the contact support 31 rotates reversely relative to the housing 1, the movable contact 51 swings reversely under the constraint of the swing constraint hole 511 with the position of the limit clamping groove 312 as a swing center, the elastic potential energy of the buffer reset piece 34 becomes small until the hinge structure 33 abuts against one end of the swing constraint hole 511, and at this time, the movable contact 51 is in a reset state relative to the contact support 31.

As shown in fig. 13, as an example of the movable contact 51: the moving contact 51 includes a moving contact body 512, a limiting protrusion 513 and a contacting portion 514, the moving contact body 512 is pivotally connected to the arc isolating body 311 in a resettable manner, the limiting protrusion 513 is integrally formed at the edge of the moving contact body 512 and swingably abuts against the limiting clamping groove 312, and the contacting portion 514 is formed at the edge of the moving contact body 512 and is matched with the corresponding static contact 52.

As an example of the above-described cushioning return member 34, as shown in fig. 9: the buffering reset member 34 is a torsion spring structure, the buffering reset member 34 includes a buffering torsion spring body 341, a first buffering leg 342 and a second buffering leg 343, the hinge structure 33 is sleeved with the buffering torsion spring body 341, the first buffering leg 342 abuts against the joint of the movable contact body 512 and the limiting protrusion 513, and the second buffering leg 343 abuts against the joint of the movable contact body 512 and the contact part 514. If the contact support 31 continues to rotate after the contacting portion 514 abuts against the corresponding fixed contact 52, the position of the first buffering leg 342 at the joint of the movable contact body 512 and the limiting protrusion 513 does not change, the second buffering leg 343 slides a small distance at the joint of the movable contact body 512 and the contacting portion 514, and the elastic potential energy of the buffering torsion spring body 341 increases. If the contacting portion 514 is far away from the corresponding fixed contact 52, the position of the first buffering leg 342 at the joint of the movable contact body 512 and the limiting protrusion 513 does not change, the second buffering leg 343 reversely slides to a far position at the joint of the movable contact body 512 and the contacting portion 514, and the elastic potential energy of the buffering torsion spring body 341 becomes small.

In order to simplify the structure of the movable contact 51, a V-shaped first clamping interface 515 is arranged at a joint of the movable contact body 512 and the limiting protrusion 513, a V-shaped second clamping interface 516 is arranged at a joint of the movable contact body 512 and the contacting part 514, and an opening angle corresponding to the second clamping interface 516 is larger than an opening angle corresponding to the first clamping interface 515; the first buffer leg 342 is positioned and hooked to the first card interface 515, and the second buffer leg 343 is slidably hooked to the second card interface 516. Because the opening angle corresponding to the second clip interface 516 is greater than the opening angle corresponding to the first clip interface 515, the second buffer leg 343 slides easily at the joint of the movable contact body 512 and the contact part 514.

As shown in fig. 2, 3 and 10, in order to facilitate the detachment and installation of the housing 1, the contact support 31 and the moving contact 51, the hinge structure 33 includes a first hinge shaft 331, a first hinge hole 332, a second hinge shaft 333 and a second hinge hole 334 coaxially arranged in sequence, the first hinge shaft 331 is integrally formed on an inner side wall of the housing 1, the first hinge hole 332 is opened on one side wall of the arc isolating body 311 and is in plug-in fit with the first hinge shaft 331, the second hinge shaft 333 is integrally formed on the other side wall of the arc isolating body 311, and the second hinge hole 334 is opened on the other inner side wall of the housing 1 and is in plug-in fit with the second hinge shaft 333.

As shown in fig. 10 and 11, in order to limit the rotation angle range of the latch 32 relative to the contact holder 31, a side wall of the arc-isolating body 311 is provided with a rotation-stopping rib 315 extending along the radial direction of the hinge structure 33, the latch 32 further includes a C-shaped ring 323 sleeved on the hinge structure 33, two ends of the C-shaped ring 323 are correspondingly connected with the arc-isolating cover 321 through two rotation-stopping strips 324, and the two rotation-stopping strips 324 extend along the radial direction of the hinge structure 33 and are located at two opposite sides of the rotation-stopping rib 315 along the circumferential direction of the hinge structure 33. When the rotation-stopping rib 315 abuts against one of the rotation-limiting bars 324, the latch 32 is located at a first swing limit position relative to the contact holder 31, and when the rotation-stopping rib 315 abuts against the other rotation-limiting bar 324, the latch 32 is located at a second swing limit position relative to the contact holder 31. Further, with this arrangement, the compactness between the contact holder 31 and the latch 32 can be improved, and the overall size of the contact holder 31 and the latch 32 can be reduced.

In order to prevent the hinge structure 33 and the latch 32 from being separated from each other after the hinge structure 33 and the latch 32 are assembled, an assembly protrusion 335 is formed on the hinge structure 33, and an assembly notch 323a adapted to the assembly protrusion 335 is formed on an inner circumferential wall of the C-shaped ring 323. During assembly, the assembly protrusions 335 and the assembly notches 323a are aligned, the assembly protrusions 335 pass through the assembly notches 323a, the C-shaped ring 323 is completely sleeved on the hinge structure 33, and finally, the assembly protrusions 335 and the assembly notches 323a are misaligned with each other.

In order to avoid the relative friction between the movable contacts 51 and the arcing body 311. The side wall of the arc isolating body 311 is provided with a C-shaped wear-resistant rib 316, the C-shaped wear-resistant rib 316 is coaxially arranged at the periphery of the hinge structure 33, the axial size of the C-shaped wear-resistant rib 316 along the hinge structure 33 is equal to the axial size of the rotation stopping rib 315 along the hinge structure 33, and the axial size of the C-shaped wear-resistant rib 316 along the hinge structure 33 is larger than the axial size of the C-shaped ring 323 along the hinge structure 33. When in use, one side wall of the movable contact 51 is in sliding contact with the C-shaped wear-resistant rib 316, and no contact phenomenon exists between the movable contact 51 and the C-shaped ring 323.

The invention also provides a circuit breaker, which comprises the double-contact action mechanism of the switching device.

Next, as shown in fig. 8 to 13, the present invention provides a reset structure of an operating mechanism of a switching device, including:

a housing 1;

the operating mechanism 3, the operating mechanism 3 includes a handle 35 (see fig. 12), a connecting rod 36 (see fig. 8), a contact support 31, a latch 32 and a linkage reset piece 37 (see fig. 8), the handle 35 includes a handle body 351 pivotally disposed on the housing 1, a handle slot 352 is disposed on an outer peripheral wall of the handle body 351, the contact support 31 includes an arc-isolating body 311 pivotally disposed on the housing 1 in a resettable manner, the latch 32 includes an arc-isolating cover body 321 pivotally disposed on the arc-isolating body 311, a cover body latch 325 is disposed on the arc-isolating cover body 321, one end of the connecting rod 36 is connected to the handle body 351 and the other end is locked or slipped between the latch 32 and the contact support 31, the linkage reset piece 37 includes an energy storage body and a first linkage end and a second linkage end led out by the energy storage body, the energy storage body is disposed on the handle body 351 or the arc-isolating cover body 321, the first linkage end abuts against the handle slot 352 along a reset rotation direction of the handle body 351 relative to the housing 1, the second linkage end abuts against the cover claw 325 in the reset rotation direction of the arc-isolating cover 321 relative to the arc-isolating body 311.

In the invention, as the handle clamping groove 352 is arranged on the peripheral wall of the handle body 351, the contact support 31 comprises the arc isolating body 311 which is pivoted on the shell 1 in a resettable manner, the lock catch 32 comprises the arc isolating cover body 321 which is pivoted on the arc isolating body 311, the cover body clamping claw 325 is arranged on the arc isolating cover body 321, one end of the connecting rod 36 is connected to the handle body 351, and the other end of the connecting rod 36 is locked or slipped between the lock catch 32 and the contact support 31, the arrangement is that when one end of the connecting rod 36 is connected to the handle body 351 and the other end of the connecting rod is locked between the lock catch 32 and the contact support 31, the handle 35 can drive the contact support 31 to rotate through the connecting rod 36; when one end of the link 36 is connected to the handle body 351 and the other end is slid between the latch 32 and the contact holder 31, the contact holder 31 can be reset with respect to the housing 1 (a reset tension spring may be provided between the contact holder 31 and the housing 1), the handle 35 can be reset with respect to the housing 1, and the latch 32 can be reset with respect to the contact holder 31. More importantly, the linkage reset piece 37 comprises an energy storage body and a first linkage end and a second linkage end which are led out from the energy storage body, the energy storage body is arranged on the handle body 351 or the arc-isolating cover body 321, the first linkage end abuts against the handle clamping groove 352 along the reset rotation direction of the handle body 351 relative to the shell 1, the second linkage end abuts against the cover clamping claw 325 along the reset rotation direction of the arc-isolating cover body 321 relative to the arc-isolating body 311, the linkage reset piece 37 can simultaneously drive the handle 35 and the lock catch 32 to reset, parts of the operating mechanism 3 with the reset function are reduced, the overall structure of the operating mechanism of the switch electric appliance is simplified, and the compactness of the operating mechanism of the switch electric appliance is improved. Therefore, the reset structure of the switch electric appliance operating mechanism can simultaneously drive the handle 35 and the lock catch 32 to reset, thereby simplifying the overall structure of the switch electric appliance operating mechanism and improving the compactness of the switch electric appliance operating mechanism.

In order to further simplify the overall structure of the operating mechanism of the switching device and improve the compactness of the operating mechanism of the switching device, an annular assembling groove 353 is arranged on one side wall of the handle body 351; the linkage reset piece 37 is a torsion spring structure, the linkage reset piece 37 comprises a linkage torsion spring body 371, a first linkage support leg 372 and a second linkage support leg 373, the linkage torsion spring body 371 is located in the annular assembly groove 353, the first linkage support leg 372 is abutted to the handle clamping groove 352, and the second linkage support leg 373 is abutted to the cover clamping jaw 325. When the switching device is in a short circuit or an overload condition, the latch 32 rotates a certain angle relative to the contact support 31 under the action of an external force, and at the moment, the elastic potential energy of the linkage reset piece 37 is increased. Then, the other end of the link 36 slides between the latch 32 and the contact holder 31, the contact holder 31 is reset by the reset tension spring, and the handle 35 and the latch 32 provide the reset of the interlocking reset member 37.

In order to facilitate the embedding of the interlocking restoring member 37 in the handle body 351, the handle engaging groove 352 radially penetrates the annular mounting groove 353 along the handle body 351.

As shown in fig. 8, 10 and 11, in order to realize that the handle 35 applies force to the contact holder 31 through the connecting rod 36, two ends of the connecting rod 36 are respectively a plugging end 361 and a pushing end 362, the arc isolating body 311 is provided with a sliding chute 313 in sliding fit with the pushing end 362, and the sliding chute 313 includes a locking groove portion 313a and a tripping groove portion 313b which are communicated; the arc-isolating cover 321 is provided with a pressing rod arm 326, the pressing rod arm 326 is in open-close fit with the locking groove 313a to lock or release the pushing end 362, and an arc-shaped locking notch 326a matched with the pushing end 362 is formed on a side wall of the pressing rod arm 326 facing the locking groove 313 a. When the latch 32 is in the reset state with respect to the contact holder 31, the pressing lever arm 326 and the locking groove portion 313a lock the pushing end 362 together.

In order to enable the lever arm 326 to lock the pushing end 362 with the locking groove portion 313a, the sliding slot 313 includes two sliding slot side walls 313c, and an escape opening 313d for escaping from the movement of the lever arm 326 is provided on one sliding slot side wall 313c close to the lever arm 326.

In order to improve the compactness of the contact support 31, the arc isolating body 311 is provided with a limit slot 312 for positioning the movable contact 51, and a slot side wall 312a of the limit slot 312 is connected with a sliding chute side wall 313c far away from the pressing rod arm 326 to form an integral structure.

In order to improve the overall rigidity of the stopper groove 312 and the slide groove 313, a reinforcing rib 314 is provided between the groove side wall 312a of the stopper groove 312 and one slide groove side wall 313c away from the presser bar arm 326.

As shown in fig. 11, in order to simplify the structure of the cover body latch 325, the cover body latch 325 includes an abutting portion 325a and a retaining portion 325b, the abutting portion 325a is integrally formed in a protruding manner in the arc-isolating cover body 321 and is abutted and engaged with the second coupling end, and the retaining portion 325b is integrally formed in a perpendicular manner in the abutting portion 325a so as to prevent the second coupling end from being separated from the abutting portion 325 a.

As shown in fig. 10, in order to restrict the rotation angle range of the arc shielding body 321 relative to the contact holder 31, the arc shielding body 311 is provided with a first limit notch 311a and a second limit notch 311b, the first limit notch 311a is engaged with one side of the arc shielding body 321 along the rotation direction thereof, and the second limit notch 311b is engaged with the other side of the arc shielding body 321 along the rotation direction thereof.

The invention also provides a circuit breaker, which comprises the reset structure of the switch electrical appliance operating mechanism.

Finally, as shown in fig. 1, 5, 14 and 15, the present invention provides a static contact component structure of a switching apparatus, including:

the structure comprises a shell 1, wherein an inner cavity of the shell 1 is divided into two assembly cavities 2 which are arranged side by side, the two assembly cavities 2 are respectively an L-pole assembly cavity 21 and an N-pole assembly cavity 22, the L-pole assembly cavity 21 comprises an L-pole arc striking chamber 211 and an L-pole arc extinguishing chamber 212 which are communicated, and the N-pole assembly cavity 22 comprises an N-pole arc striking chamber 221 and an N-pole arc extinguishing chamber 222 which are communicated; specifically, the housing 1 includes a base 11, an intermediate partition 12, and a cover 13, the base 11 and the cover 13 enclosing an inner cavity defining the housing 1, the intermediate partition 12 dividing the inner cavity into an L-pole fitting cavity 21 and an N-pole fitting cavity 22.

The conductive mechanism comprises a magnetic yoke 6 and an N-pole integrated plate 7 which are integrally formed, the magnetic yoke 6 comprises a magnetic gathering frame part 61, a transition connection part 62, an L-pole static contact installation part 63, an arc-shaped first L-pole arc striking part 64, an inclined plate-shaped second L-pole arc striking part 65 and an L-pole arc extinguishing plate part 66 which are sequentially connected, the magnetic gathering frame part 61 is clamped in a short circuit release 4, the L-pole arc extinguishing plate part 66 is positioned in the L-pole arc extinguishing chamber 212, and the N-pole integrated plate 7 comprises a wiring plate part 71, an inclined connection part 72, a conductive plate part 73, an N-pole static contact installation part 74, an arc-shaped first N-pole arc striking part 75 and an inclined plate-shaped second N-pole arc striking part 76 which are sequentially connected;

the contact mechanism 5 includes two fixed contacts 52, the two fixed contacts 52 are an L-pole fixed contact 521 and an N-pole fixed contact 522, the L-pole fixed contact 521 is disposed on the L-pole fixed contact mounting portion 63, and the N-pole fixed contact 522 is disposed on the N-pole fixed contact mounting portion 74.

In the invention, the conductive mechanism comprises a magnetic yoke 6 and an N-pole integrated plate 7 which are integrally formed, the magnetic yoke 6 comprises a magnetic gathering frame part 61, a transition connection part 62, an L-pole static contact installation part 63, an arc-shaped first L-pole arc striking part 64, a slant plate-shaped second L-pole arc striking part 65 and an L-pole arc extinguishing plate part 66 which are sequentially connected, the magnetic gathering frame part 61 is clamped on a short circuit release 4, the L-pole arc extinguishing plate part 66 is positioned in the L-pole arc extinguishing chamber 212, the N-pole integrated plate 7 comprises a wiring plate part 71, a slant connection part 72, a conductive plate part 73, an N-pole static contact installation part 74, an arc-shaped first N-pole arc striking part 75 and a slant plate-shaped second N-pole arc striking part 76 which are sequentially connected, meanwhile, the L-pole static contact 521 is arranged on the L-pole static contact installation part 63, the N-pole static contact 522 is arranged on the N-pole static contact installation part 74, and the magnetic yoke 6 and the N-pole integrated plate 7 of the conductive mechanism can be conveniently and integrally formed, therefore, the number of parts of the conductive mechanism can be simplified, the reliability of the conductive mechanism is improved, and the conductive mechanism has the functions of magnetism gathering, electric conduction, arc striking and arc extinguishing. Therefore, the static contact assembly structure of the switch electric appliance can enable the magnetic yoke 6 and the N-pole integrated plate 7 to be integrally formed, simplifies the number of parts of the conducting mechanism, improves the reliability of the conducting mechanism, and has the functions of magnetism gathering, conducting, arc striking and arc extinguishing.

As shown in fig. 14, in order to provide the magnetic concentration frame portion 61 with the magnetic concentration function, the magnetic concentration frame portion 61 is U-shaped, the magnetic concentration frame portion 61 includes a first supporting plate portion 611, an overhead plate portion 612 and a second supporting plate portion 613 which are connected in sequence, the first supporting plate portion 611 is provided with a retaining notch 611a, and the second supporting plate portion 613 is provided with a retaining through hole 613 a.

As shown in fig. 16 and 17, in order to improve the arc-isolating performance of the L-pole arc-striking chamber 211, two L-pole arc-isolating plates 213 are symmetrically disposed in the L-pole arc-striking chamber 211. Similarly, two N-pole arc separators 223 are symmetrically disposed in the N-pole arc ignition chamber 221. In order to guide the arc to the L-pole arc extinguishing chamber 212, the L-pole arc isolating plate 213 is provided with an L-pole arc-guiding long groove 213a, and the L-pole arc-guiding long groove 213a extends in the direction of the L-pole arc extinguishing chamber 212. Similarly, the N-pole arc-isolating plate 223 is provided with an N-pole arc-striking long groove 223a, and the N-pole arc-striking long groove 223a extends toward the N-pole arc-extinguishing chamber 222.

The N-pole integrated plate 7 further includes an N-pole arc-extinguishing plate portion (not shown) that is integrally formed with the second N-pole arc-striking portion 76 and is located inside the N-pole arc-extinguishing chamber 222.

As shown in fig. 6, an L-pole arc chute assembly 23 is disposed in the L-pole arc chute 212, and an N-pole arc chute assembly or arc-extinguishing long rib 24 is disposed in the N-pole arc chute 222.

The invention also provides a circuit breaker, which comprises the static contact component structure of the switch electric appliance.

In conclusion, the present invention effectively overcomes various disadvantages of the prior art and has high industrial utilization value.

The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims (10)

1. A double-contact actuating mechanism of a switching device is characterized by comprising:

the device comprises a shell (1), wherein the inner cavity of the shell (1) is divided into two assembly cavities (2) which are arranged side by side;

the operating mechanism (3), the operating mechanism (3) includes contact holder (31) and lock catch (32), the contact holder (31) can reset and pivot in the outer casing (1) and locate at the communicating position of two assembly cavities (2) through a hinge structure (33), the contact holder (31) includes the tabular arc isolating body (311), two limit slots (312) are symmetrically arranged on the two opposite sides of the arc isolating body (311), the lock catch (32) includes the tabular arc isolating cover body (321), the arc isolating cover body (321) can reset and pivot in the arc isolating body (311) and locate at the edge of the arc isolating body (311) close to a short-circuit release (4), one side of the arc isolating cover body (321) in the circumferential direction is equipped with the auxiliary arc isolating plate (322), the auxiliary arc isolating plate (322) is used for shielding an arc leakage seam which is formed between the arc isolating cover body (321) and the arc isolating body (311) when the arc isolating cover body (321) rotates relative to the arc isolating body (311);

the contact mechanism (5), contact mechanism (5) include two moving contacts (51), and two moving contacts (51) are arranged in two assembly chamber (2) and are located two spacing draw-in grooves (312) correspondingly.

2. The double-contact actuating mechanism of switching apparatus according to claim 1, wherein: the moving contact (51) is provided with a swing constraint hole (511), the hinge structure (33) can be slidably arranged in the swing constraint hole (511) along the length direction of the swing constraint hole (511), and a buffer reset piece (34) for driving the moving contact (51) to swing towards the corresponding static contact (52) is arranged between the hinge structure (33) and the moving contact (51); when the hinge structure (33) is abutted against one end of the swing constraint hole (511), the movable contact (51) swings to a first swing limit position relative to the arc isolating body (311), and when the hinge structure (33) is abutted against the other end of the swing constraint hole (511), the movable contact (51) swings to a second swing limit position relative to the arc isolating body (311).

3. The double-contact actuating mechanism of switching apparatus according to claim 2, wherein: the moving contact (51) comprises a moving contact body (512), a limiting protrusion (513) and a contact part (514), the moving contact body (512) is connected with the arc isolating body (311) in a pivoting mode in a resetting mode, the limiting protrusion (513) is integrally formed at the edge of the moving contact body (512) and can be abutted to the limiting clamping groove (312) in a swinging mode, and the contact part (514) is formed at the edge of the moving contact body (512) and is matched with the corresponding static contact (52) in position.

4. The double-contact actuating mechanism of switching apparatus according to claim 3, wherein: the buffering resets piece (34) and is the torsional spring structure, and buffering resets piece (34) including buffering torsional spring body (341), first buffering stabilizer blade (342) and second buffering stabilizer blade (343), and articulated structure (33) are located in buffering torsional spring body (341) cover, and first buffering stabilizer blade (342) butt is in moving contact body (512) and spacing protruding (513) linking department, and second buffering stabilizer blade (343) butt is in moving contact body (512) and the linking department of contacting portion (514).

5. The double-contact actuating mechanism of switching apparatus according to claim 4, wherein: a V-shaped first clamping interface (515) is arranged at the joint of the movable contact body (512) and the limiting protrusion (513), a V-shaped second clamping interface (516) is arranged at the joint of the movable contact body (512) and the contact part (514), and the opening angle corresponding to the second clamping interface (516) is larger than that corresponding to the first clamping interface (515); the first buffer supporting leg (342) is positioned and hooked on the first card interface (515), and the second buffer supporting leg (343) is slidably hooked on the second card interface (516).

6. The double-contact actuating mechanism of switching apparatus according to claim 1, wherein: hinge structure (33) are including coaxial first articulated shaft (331) of arranging in proper order, first articulated hole (332), second articulated shaft (333) and second articulated hole (334), first articulated shaft (331) integrated into one piece is in an inside wall of shell (1), first articulated hole (332) are seted up in a lateral wall of arc body (311) and are pegged graft the cooperation with first articulated shaft (331), second articulated shaft (333) integrated into one piece is in another lateral wall of arc body (311), second articulated hole (334) are seted up in another inside wall of shell (1) and are pegged graft the cooperation with second articulated shaft (333).

7. The double-contact actuating mechanism of switching apparatus according to claim 1, wherein: the utility model discloses a lock catch, including the hasp (32), the both ends of C type ring (323) are connected with the arc separation cover body (321) through two rotation spacing strips (324), and two rotation spacing strips (324) are all followed the radial extension of hinge structure (33) and are located rotation backstop muscle (315) along the relative both sides of hinge structure (33) circumference, the rotation backstop muscle (315) of radial extension of hinge structure (33) is equipped with along hinge structure (33) to a lateral wall of arc separation body (311), C type ring (323) of hinge structure (33) is still located including the cover to hasp (32), and the both ends correspondence of C type ring (323) are connected with arc separation cover body (321), and two rotation spacing strips (324) are all followed the radial extension of hinge structure (33) and are located rotation backstop muscle (315).

8. The double-contact actuating mechanism of switching apparatus according to claim 7, wherein: be equipped with assembly card protruding (335) on hinge structure (33), be equipped with assembly breach (323a) with assembly card protruding (335) looks adaptation on the internal perisporium of C type ring (323).

9. The double-contact actuating mechanism of switching apparatus according to claim 7, wherein: be equipped with C type wear-resisting muscle (316) on the lateral wall of arc separation body (311), C type wear-resisting muscle (316) coaxial arrangement is in the periphery department of hinge structure (33), and C type wear-resisting muscle (316) are equal to along hinge structure (33) axial size to rotate backstop muscle (315), and C type wear-resisting muscle (316) are greater than C type ring (323) along hinge structure (33) axial size.

10. A circuit breaker, characterized by: a dual contact action mechanism comprising a switching apparatus as claimed in any one of claims 1 to 9.

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