CN220774269U - Moving contact mechanism - Google Patents

Abstract

The utility model relates to the field of piezoelectric devices, in particular to a moving contact mechanism which comprises a supporting structure, a moving contact and a spring structure, wherein the moving contact is rotatably arranged on the supporting structure, and the spring structure is arranged between the moving contact and the supporting structure; the supporting structure comprises a contact support and a metal bracket, the supporting structure is pivoted around a central line O-O through the contact support, the metal bracket is fixedly arranged on the contact support, and the moving contact is arranged on the metal bracket and is pivoted around the central line O-O relative to the metal bracket; the movable contact mechanism has long service life.

Description

Moving contact mechanism

Technical Field

The utility model relates to the field of piezoelectric devices, in particular to a moving contact mechanism.

Background

In the existing moving contact mechanism, a moving contact is directly arranged on a contact support made of plastic, and in the action process, the contact support is severely worn, so that the service life of the moving contact mechanism is seriously influenced; in addition, the movable contact is generally electrically connected with an external circuit through soft connection, so that the connection operation is complex and the connection is unstable.

Disclosure of Invention

The utility model aims to overcome at least one defect in the prior art and provides a moving contact mechanism which has long service life.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the movable contact mechanism comprises a supporting structure, a movable contact and a spring structure, wherein the movable contact is rotatably arranged on the supporting structure, and the spring structure is arranged between the movable contact and the supporting structure;

the supporting structure comprises a contact support and a metal support, the supporting structure is pivoted around a central line O-O through the contact support, the metal support is fixedly arranged on the contact support, and the moving contact is arranged on the metal support and is pivoted around the central line O-O relative to the metal support.

Further, the contact support comprises a pair of support side walls arranged at intervals, and the contact support is pivoted around a central line O-O through the support side walls; the metal support comprises a pair of support side walls which are arranged at intervals relatively, the two support side walls are positioned between the two support side walls, and the moving contact is positioned between the two support side walls and is pivoted on the two support side walls.

Further, the two support side walls are respectively in limit fit with the two support side walls, so that the two support side walls only allow to enter between the two support side walls from one direction.

Further, the contact support further comprises a support connecting plate, and two ends of the support connecting plate are respectively connected with the two support side walls and are integrally in a U-shaped structure; the metal support further comprises support connecting plates, and two ends of each support connecting plate are respectively connected with the side walls of the two supports and are integrally of a U-shaped structure.

Further, the contact support further comprises a support beam positioned between the two support side walls, and two ends of the support beam are respectively connected with the two support side walls; the support side wall comprises a support side wall opening, and the support side wall is clamped on the support beam through the support side wall opening.

Further, the moving contact mechanism further comprises a contact conducting plate, a contact rotating shaft structure and a contact pressure spring; the movable contact is arranged on the contact rotating shaft structure and comprises a first movable contact and a second movable contact which are arranged side by side and synchronously rotate; the contact conducting plate is arranged on the contact rotating shaft structure and is positioned between the first moving contact and the second moving contact; the support side wall comprises support side wall shaft grooves arranged on the support side wall shaft grooves, two ends of the contact rotating shaft structure are respectively arranged in the support side wall shaft grooves of the two support side walls, two groups of contact pressure springs are respectively sleeved on the contact rotating shaft structure and located on two sides of the moving contact, and each group of contact pressure springs is located between the moving contact and the corresponding support side wall.

Further, the contact rotating shaft structure comprises a rotating shaft, a shaft sleeve and a limiting ring which are coaxially arranged; the shaft sleeve is rotatably sleeved outside the rotating shaft, the moving contact is rotatably arranged on the shaft sleeve, two limiting rings are respectively arranged at two ends of the rotating shaft, the two limiting rings are respectively positioned at the outer sides of two ends of the shaft sleeve and are respectively positioned in shaft grooves of two side walls of the support, and a contact pressure spring sleeved on the shaft sleeve is arranged between each limiting ring and the moving contact.

Further, the contact rotating shaft structure further comprises rotating shaft positioning screws, and the two groups of rotating shaft positioning screws respectively penetrate through the corresponding supporting side wall and the corresponding support side wall from two sides of the supporting structure in sequence and are in threaded connection with the corresponding end parts of the rotating shaft.

Further, the spring structure comprises a contact pressing plate and a first spring, the contact pressing plate is arranged on the metal support in a sliding mode, the first spring is arranged between one side of the contact pressing plate and the metal support, the middle of the moving contact is arranged on a support connecting plate of the metal support in a pivoted mode around the center line O-O, one end of the moving contact is provided with a moving contact, and the other end of the moving contact is in butt joint with the other side of the contact pressing plate.

Further, two side walls of the two supports of the metal support are respectively provided with a pressing plate sliding groove, two ends of the contact pressing plate are respectively provided with a pressing plate sliding shaft, and the two pressing plate sliding shafts are respectively arranged in the two pressing plate sliding grooves in a sliding manner and are positioned at two sides of the moving contact.

Further, the spring structure comprises a second spring, one end of the second spring is a first end of the spring, and the other end of the second spring is a second end of the spring connected to the supporting structure; one end of the movable contact is provided with a movable contact, and the first end of the spring is connected to a part of the movable contact, which is positioned between the central line O-O and the movable contact.

Further, the spring structure further comprises a contact pressing plate, two pressing plate sliding shafts are respectively arranged at two ends of the contact pressing plate, two pressing plate sliding grooves are respectively formed in the side walls of the two supports of the metal support, the two pressing plate sliding shafts are respectively arranged in the two pressing plate sliding grooves in a sliding mode, and the second ends of springs of the two second springs are respectively connected to the two pressing plate sliding shafts.

Further, the spring structure further comprises a second connecting shaft arranged on the movable contact, two second springs are positioned on two sides of the movable contact, and first ends of the springs of the two second springs are respectively connected to two ends of the second connecting shaft.

The movable contact mechanism comprises a contact support and a metal support, wherein the contact support realizes the pivot setting of the support, and the metal support is used for installing the movable contact, so that the structural strength of the support is improved and the service life of the movable contact mechanism is prolonged on the premise of ensuring the insulating property of the support.

In addition, the contact pressure spring ensures reliable contact of the first moving contact, the contact conducting plate and the second moving contact, does not influence free rotation of the moving contact, and ensures the action performance of the moving contact.

In addition, the support side wall is in limit fit with the support side wall, so that the support side plate only allows to enter between the two support side walls from one direction, the support side wall is clamped on the support cross beam through the support side wall opening, the installation efficiency of the metal support and the contact support is improved, and the installation reliability and stability of the metal support and the contact support are guaranteed.

Drawings

Fig. 1 is an exploded schematic view of a circuit breaker of the present utility model;

fig. 2 is a schematic cross-sectional view of the circuit breaker of the present utility model;

FIG. 3 is an exploded view of the moving contact mechanism of the present utility model from one perspective;

FIG. 4 is an exploded view of the moving contact mechanism of the present utility model from another perspective;

FIG. 5 is a schematic perspective view of the moving contact mechanism of the present utility model in one view;

FIG. 6 is a schematic perspective view of the moving contact mechanism of the present utility model in another view;

fig. 7 is an exploded view of the moving contact mechanism of the present utility model.

Reference numerals illustrate:

1, an operating mechanism; a C contact system; 32 static contacts; 34 arc extinguishing chambers; 35 moving contact mechanisms; 301-303 support structures; 301 contact support; 3010 support a connection plate; 3011 support sidewalls; 3012 support beams; 303 a metal bracket; 3030 bracket connection plate; 3031 stent sidewalls; 30310 bracket sidewall axle slots; 30311 platen chute; 30312 bracket sidewall openings; 306 a platen slide shaft; 308 contact pressure springs; 309 axis of rotation; 310 shaft sleeve; 311 moving contacts; 3111 a first moving contact; 3112 a second moving contact; 312 contact conductive plates; 3121 a first contact conductive plate; 3122 a second contact conductive plate; 313 reinforcing shafts; 314 spindle set screw; 315 a second connecting shaft; 316 a first connecting shaft; 317 limit rings; 318 first connection plate; 319 clips; 320 contact positioning shafts; 321 support structure shaft; 5 a thermomagnetic tripping mechanism; 6, a shell; 7, a lower shell; 706 zero arcing device; 8, an upper shell; 9 face covers.

Detailed Description

Embodiments of the circuit breaker of the present utility model are further described below with reference to the examples shown in the drawings. The circuit breaker of the present utility model is not limited to the description of the following embodiments.

As shown in fig. 1-2, the circuit breaker according to the embodiment of the present utility model is preferably a plug-in circuit breaker, and in particular, a plug-in molded case circuit breaker.

As shown in fig. 1-2, the circuit breaker of the present embodiment includes a circuit breaker housing, an operating mechanism 1 and at least one phase of circuit breaking poles respectively disposed in the circuit breaker housing, the circuit breaking poles include a conductive device, the conductive device includes a contact system C, and the operating mechanism 1 is drivingly connected with the contact system C to drive the contact system C to close or break, that is, to close or break the circuit breaker. Further, the breaking pole further comprises an arc extinguishing chamber 34 matched with the contact system C, and an arc inlet of the arc extinguishing chamber 34 is opposite to the contact system C and is used for extinguishing an arc generated by breaking of the contact system C. Further, the circuit breaker of the embodiment comprises at least two phases of circuit breaking poles, each phase of circuit breaking poles are arranged side by side along the width direction of the circuit breaker shell, and the contact system C of each phase of circuit breaking poles is in driving connection with the operating mechanism 1. Further, as shown in fig. 1, the direction in which the conductive devices of the circuit breaker poles are arranged side by side is the width direction of the circuit breaker housing; the inside-outside direction of the paper surface of fig. 2 is the width direction of the breaker case.

Specifically, as shown in fig. 1, the circuit breaker of the present embodiment is a three-phase circuit breaker including three-phase circuit breaking poles arranged side by side in the width direction of the circuit breaker. Further, as shown in fig. 1, the three-phase conductive devices of the breaker pole are an a-phase conductive device 2, a B-phase conductive device 3 and a C-phase conductive device 4 which are sequentially arranged.

As shown in fig. 1-2, the breaker further includes a zero arcing device 706, an inlet of the zero arcing device 706 being opposite an exhaust of the arc chute 34; the operating mechanism 1, the contact system C, the arc extinguishing chamber 34 and the zero arcing device 706 are arranged in sequence in the height direction of the circuit breaker housing. The above layout manner of the circuit breaker of the embodiment provides a larger installation space for the arc-extinguishing chamber 34 in the circuit breaker pole, so that the arc-extinguishing chamber 34 can be provided with more arc-extinguishing gate sheets to improve arc-extinguishing capability and efficiency; secondly, the electric arc generated by the contact system C firstly enters the arc extinguishing chamber 34, then the gas exhausted by the arc extinguishing chamber 34 enters the zero arcing device 706, so that the arc extinguishing effect is remarkably improved, the real zero arcing is realized, the small-volume large breaking is realized, the zero arcing is ensured, and the breaking capacity of the circuit breaker can be improved. Further, the outlet of the zero arcing device 706 is opposite to the inlet, and is located at two ends of the zero arcing device 706, that is, the inlet and the outlet of the zero arcing device 706 face opposite directions, and the outlet of the zero arcing device 706 is far away from the operating mechanism 1, so that the damage of charged particles to the operating mechanism 1 is avoided, and the safety of operation and the insulation of products are improved. Further, in the circuit breaker of the present embodiment, the direction from the operating mechanism 1 to the zero arcing device 706 of the breaking pole is the height direction of the circuit breaker housing, that is, the up-down direction of fig. 2 is the height direction of the circuit breaker housing.

As shown in fig. 2, the circuit breaker pole further includes a connection terminal 704, the connection terminal 704 is a bridge connection terminal, the connection terminal 704 is used as a connection terminal and a connection terminal, in the length direction of the circuit breaker shell, the connection terminals are located at two sides of the zero arcing device 706, the connection terminal, the zero arcing device 706 and the connection terminal are arranged side by side on the same side of the arc extinguishing chamber 34 away from the operating mechanism 1, the connection terminal and the connection terminal of the circuit breaker pole are arranged at the same end of the circuit breaker, synchronous connection between the connection terminal and the connection terminal is achieved, more installation space is provided for the operating mechanism 1, and the connection terminal is away from the operating mechanism 1, so that the insulation performance and the operation safety of the circuit breaker are improved. Further, in the circuit breaker of the present embodiment, the side-by-side direction of the connection terminal 704 and the zero arcing device 706 is the length direction of the circuit breaker housing, that is, the left-right direction of fig. 2 is the length direction of the circuit breaker housing.

As shown in fig. 2, the breaking pole further includes a first conductive plate and a second conductive plate, where the first conductive plate and the second conductive plate pass through two sides of the arc extinguishing chamber 34 in the length direction of the breaker, one ends of the first conductive plate and the second conductive plate are respectively connected to the connection terminals 704 on two sides of the zero arcing device 706, and the other ends are respectively connected to the moving contact 311 and the fixed contact 32 of the contact system C.

As shown in fig. 1-2, the circuit breaker of the present embodiment further includes a thermo-magnetic tripping mechanism 5 for driving the operating mechanism 1 to trip when an overload or short-circuit fault occurs in the circuit where the circuit breaker is located, and the thermo-magnetic tripping mechanism 5 is located on one side of the operating mechanism 1 and the contact system C in the length direction of the circuit breaker housing. The thermomagnetic tripping mechanism 5 comprises a thermal tripping structure for driving the operating mechanism 1 to trip when the circuit of the circuit breaking pole (namely, the circuit of the thermomagnetic tripping mechanism 5) has overload faults, and a magnetic tripping structure for driving the operating mechanism 1 to trip when the circuit of the circuit breaking pole (namely, the circuit of the thermomagnetic tripping mechanism 5) has short-circuit faults.

As shown in fig. 1, the circuit breaker of this embodiment further includes a phase separator, one end of which is connected to one end of the circuit breaker housing in the height direction, and separates the wiring ports of the adjacent circuit breaking poles, thereby improving the insulation between the adjacent circuit breaking poles.

As shown in fig. 1-2, the circuit breaker housing includes an upper housing 8, a middle housing 6, and a lower housing 7, which are sequentially arranged in a height direction of the circuit breaker housing; the operating mechanism 1, the conducting device D of the circuit breaking pole and the thermomagnetic tripping mechanism 5 are all arranged in a first space enclosed by the upper shell 8 and the middle shell 6; the zero arcing device 706 and the wiring terminal 704 of the circuit breaking pole are arranged in a second space enclosed by the middle shell 6 and the lower shell 7; the first and second conductive plates of the breaker pole each extend from the first space into the second space. Further, the circuit breaker housing further comprises a surface cover 9, the surface cover 9 and the middle housing 6 are located at two sides of the upper housing 8 in the height direction of the circuit breaker, a third space for accommodating accessories is formed between the surface cover 9 and the upper housing 8, and the accessories drive the operating mechanism 1 to trip through the thermomagnetic tripping mechanism 5. Further, the accessory is a shunt release. Specifically, as shown in fig. 1-2, the face cover 9, the upper housing 8, the middle housing 6 and the lower housing 7 are sequentially arranged from top to bottom.

As shown in fig. 2-4, is one embodiment of the conductive device.

As shown in fig. 2-4, the conductive device D includes a conductive device housing, and a contact system C and an arc extinguishing chamber 34 disposed in the conductive device housing, where the contact system C includes a moving contact mechanism 35 and a fixed contact 32, the moving contact mechanism 35 includes supporting structures 301-303 pivotally disposed about a center line O-O, and a moving contact 311 disposed on the supporting structures 301-303, the moving contact 311 is used in cooperation with the fixed contact 32, and a breaking gap formed after breaking the moving contact 311 and the fixed contact 32 is opposite to an arc inlet of the arc extinguishing chamber 34. The conductive device D is provided with an independent shell, so that insulativity between each broken electrode is improved, and the probability of interphase short circuit is reduced.

As shown in fig. 2, the arc extinguishing chamber 34 includes an arc extinguishing chamber housing and a grid set disposed in the arc extinguishing chamber housing, wherein the grid set includes a plurality of arc extinguishing grid plates disposed side by side along a length direction of the circuit breaker housing; the arc-extinguishing chamber shell is provided with an arc inlet of the arc-extinguishing chamber and an exhaust port of the arc-extinguishing chamber, the arc inlet and the exhaust port of the arc-extinguishing chamber are respectively positioned at two sides of the grid sheet group, the arc-extinguishing chamber shell further comprises a buffer plate, the buffer plate is positioned between the grid sheet group and the exhaust port and divides the internal space of the arc-extinguishing chamber shell into two parts, and two sides of the buffer plate at two ends of the breaker shell in the length direction are respectively provided with an air passage for communicating the space at two sides of the buffer plate; in the direction of the height of the breaker housing, the arc inlet of the arc extinguishing chamber, the buffer plate and the exhaust port of the arc extinguishing chamber are sequentially arranged. The buffer plates can extend the residence time of the arc gases within the grid set and increase the flow distance of the arc gases within the arc chute 304, improving the arc chute 34's arc extinguishing capability and efficiency.

The conductive device housing is provided with a conductive device exhaust port which is arranged opposite to the exhaust port of the arc extinguishing chamber 34, and a first ionization net is arranged in the conductive device exhaust port. Further, the exhaust port of the conductive device is also matched with the inlet of the zero-flashover device 706, so that the gas discharged from the arc extinguishing chamber 34 enters the zero-flashover device 706 through the exhaust port of the conductive device, thereby realizing real zero-flashover.

Further, the conductive device further comprises a magnetic block for promoting the electric arc to enter the arc extinguishing chamber 34, the magnetic block is arranged on the fixed contact 32 and is close to the fixed contact of the fixed contact 32, and the magnetic block and the fixed contact are respectively arranged on two sides of the fixed conductive plate of the fixed contact 32.

Further, the conductive device further comprises a first arc striking plate and a second arc striking plate, the first arc striking plate is electrically connected with the fixed contact 32, the first arc striking plate and the second arc striking plate are respectively arranged at two ends of an arc inlet of the arc extinguishing chamber 34, and when the movable contact 311 is positioned at the breaking position, the free end of the movable contact 311 is in relative fit with the second arc striking plate.

Further, the conductive device shell comprises a left conductive device half shell and a right conductive device half shell which are buckled relatively, and the left conductive device half shell and the right conductive device half shell are buckled together along the width direction of the circuit breaker shell. Further, the left half shell of the conductive device is fixedly connected with the right half shell of the conductive device through screws.

As shown in fig. 3-7, is one embodiment of the movable contact mechanism 35.

As shown in fig. 3-7, the moving contact mechanism 35 includes a supporting structure 301-303, a moving contact 311, and a spring structure, where the moving contact 311 is rotatably disposed on the supporting structure 301-303, and the spring structure is disposed between the moving contact 311 and the supporting structure 301-303, and is used to apply an over-travel force to the moving contact 311, that is, the spring structure applies a force to the moving contact 311, so that the moving contact 311 is in a limit fit with the supporting structure 301-303 (that is, the moving contact 311 is in a free state, the spring structure drives the moving contact 311 to be in a limit fit with the supporting structure 301-303 so as to keep relatively stationary), and the moving contact 311 is pressed against a mating contact structure that is closed with the moving contact 311 (that is, when the moving contact 311 is closed with the contact structure, the moving contact 311 is relatively rotated with respect to the supporting structure 301-303, and the spring structure provides an over-travel force to the moving contact 311 so as to press the mating contact structure, and the mating contact structure is preferably a fixed contact 32); the supporting structures 301-303 comprise a contact supporting structure 301 and a metal supporting frame 303, the supporting structures 301-303 are arranged through the contact supporting structure 301 in a pivoting mode around a central line O-O, the metal supporting frame 303 is fixedly arranged on the contact supporting structure 301, and the movable contact 311 is arranged on the metal supporting frame 303 and is arranged in a rotating mode around the central line O-O relative to the metal supporting frame 303. Further, the contact support 301 is a plastic contact support, or a contact support made of other insulating materials. The supporting structures 301-303 comprise contact supports 301 and metal supports 303, the contact supports 301 realize the pivot arrangement of the supporting structures 301-303, the metal supports 303 are used for installing the movable contacts 311, and on the premise of guaranteeing the insulating performance of the supporting structures 301-303, the structural strength of the supporting structures 301-303 is improved, and the service life of the movable contact mechanism 35 is prolonged.

As shown in fig. 3-7, the contact support 301 includes a pair of support side walls 3011 disposed in opposed spaced relation, the contact support 301 being pivotally disposed about a centerline O-O by the support side walls 3011; the metal bracket 303 includes a pair of bracket side walls 3031 disposed at opposite intervals, two bracket side walls 3031 are located between two support side walls 3011, and the movable contact 311 is located between the two bracket side walls 3031 and pivotally disposed on the two bracket side walls 3031. Further, one end of the movable contact 311 is provided with a movable contact, and the other end is rotatably disposed on the two bracket sidewalls 3031 and located between the two bracket sidewalls 3031.

As shown in fig. 3-7, the two bracket side walls 3031 are each in positive engagement with the two support side walls 3011 such that the two bracket side walls 3031 only permit access between the two support side walls 3011 from one direction. Further, a supporting limit groove is formed in the inner side of the supporting side wall 3011, and the inner side of the supporting side wall 3011 refers to the side of the supporting side wall 3011 facing the other supporting side wall 3011, and one end of the supporting limit groove is open; the outer side of the bracket sidewall 3031 is provided with a bracket limiting protrusion, and the outer side of the bracket sidewall 3031 refers to the side of the bracket sidewall 3031 facing the support sidewall 3011, into which the bracket limiting protrusion is inserted from the opening of the bracket limiting groove.

As shown in fig. 3-7, the contact support 301 further includes a support connection board 3010, where two ends of the support connection board 3010 are respectively connected to two support side walls 3011 and are integrally in a U-shaped structure; the metal bracket 303 further includes a bracket connection plate 3030, where the bracket connection plate 3030 is connected to two bracket side walls 3031 respectively and has a U-shaped overall structure. Further, the contact support 301 further includes a support beam 3012 located between the two support side walls 3011, two ends of the support beam 3012 are connected to the two support side walls 3011 respectively, and one side of the support beam 3012 is further connected to a support connection board 3010; the bracket side wall 3031 also includes a bracket side wall opening 30312, and the bracket side wall 3031 is snapped onto the bracket cross-beam 3012 through the bracket side wall opening 30312, thereby further improving the reliability of the contact support 301 and the metal bracket 303 retention. Further, the contact support 301 is provided with a support driving shaft hole, the support driving shaft hole penetrates through the support side wall 3011 and the support cross beam 3012, a driving shaft is inserted in the support driving shaft hole, and the operating mechanism 1 is in transmission connection with the driving shaft to drive the moving contact mechanism 35 to rotate so as to be closed or opened with the fixed contact 32.

As shown in fig. 3-7, the moving contact mechanism 35 further includes a contact conductive plate 312, a contact rotating shaft structure, and a contact compression spring 308; the moving contact 311 is arranged on the contact rotating shaft structure and comprises a first moving contact 3111 and a second moving contact 3112 which are arranged side by side and synchronously rotate; the contact conductive plate 312 is disposed on the contact rotating shaft structure and located between the first moving contact 3111 and the second moving contact 3112; the bracket side wall 3031 includes bracket side wall shaft slots 30310 disposed thereon, two ends of the contact shaft structure are respectively disposed in the bracket side wall shaft slots 30310 of the two bracket side walls 3031, and two sets of contact compression springs 308 are respectively sleeved on the contact structure shaft and are located at two sides of the moving contact 311. The contact pressure spring 308 ensures reliable contact of the first moving contact 3111, the contact conductive plate 312 and the second moving contact 3112, and does not affect free rotation of the moving contact 311, ensuring actuation performance of the moving contact 311. Further, the contact conductive plate 312 includes a first contact conductive plate 3121 and a second contact conductive plate 3122 that are symmetrically disposed.

As shown in fig. 3-4, the contact rotating shaft structure includes a rotating shaft 309, a shaft sleeve 310 and a limiting ring 317 which are coaxially arranged; the shaft sleeve 310 is rotatably sleeved outside the shaft 309, the moving contact 311 is disposed on the shaft sleeve 310, two limiting rings 317 are disposed at two ends of the shaft 309, two limiting rings 317 are respectively disposed at two outer sides of the two ends of the shaft sleeve 310 and are respectively disposed in two bracket sidewall shaft slots 30310, and a contact pressure spring 308 sleeved on the shaft sleeve 310 is disposed between each limiting ring 317 and the moving contact 311. The shaft sleeve 310 ensures that the moving contact 311 can freely rotate, the contact pressure spring 308 compresses the moving contact 311 and the contact conductive plate 312, ensures reliable contact of the moving contact 311 and the contact conductive plate 312, and has good conductivity.

Further, as shown in fig. 4-6, the contact rotating shaft structure further includes rotating shaft positioning screws 314, and the two sets of rotating shaft positioning screws 314 respectively pass through the corresponding support side plate 3011 and the corresponding bracket side plate 3031 from two sides of the support structure 301-303 and then are connected with the corresponding end of the rotating shaft 309 in a threaded manner, so as to ensure reliable connection between the contact rotating shaft structure and the support structure 301-303.

As shown in fig. 3-4 and 6, a first implementation of the spring structure is as follows:

the spring structure comprises a contact pressing plate 305 and a first spring 304, wherein the contact pressing plate 305 is arranged on the metal bracket 303 in a sliding manner, the first spring 304 is arranged between one side of the contact pressing plate 305 and the metal bracket 303, the middle part of the moving contact 311 is pivoted on a bracket connecting plate 3030 of the metal bracket 303 around a central line O-O, one end of the moving contact is provided with a moving contact, and the other end of the moving contact is abutted against the other side of the contact pressing plate 305; when the moving contact 311 is closed with the mating contact structure (for example, the fixed contact 32), the moving contact 311 rotates relative to the metal bracket 303, and compresses the first spring 304 through the contact pressing plate 305, and the first spring 304 applies a reaction force to the moving contact 311 through the contact pressing plate 305, so that the moving contact 311 compresses the mating contact structure. Further, two bracket sidewalls 3031 of the metal bracket 303 are provided with a pressing plate sliding groove 30311, two ends of the contact pressing plate 305 are respectively provided with a pressing plate sliding shaft 306, and the two pressing plate sliding shafts 306 are respectively slidably arranged in the two pressing plate sliding grooves 3031 and are positioned at two sides of the moving contact 311 to limit the moving contact 311 in the axial direction of the contact rotating shaft structure.

Further, as shown in fig. 3-4 and 6, the spring structure further includes a first positioning shaft disposed on the contact pressing plate 305 and a second positioning shaft 302 disposed on the bracket connection plate 3030, two ends of the first spring 304 are respectively sleeved on the first positioning shaft and the second positioning shaft 302, so that the reliability of assembling the first spring 304 is improved. Further, two first springs 304 are disposed side by side and respectively correspondingly cooperate with the first moving contact 3111 and the second moving contact 3112 of the moving contact 311. Further, the second positioning shaft 302 includes a second positioning shaft cap and a second positioning shaft body, the outer diameter of the second positioning shaft cap is larger than that of the second positioning shaft body, the second positioning shaft cap is sandwiched between the bracket connecting plate 3030 of the metal bracket 303 and the supporting base 3010 of the contact support 301, and the second positioning shaft body protrudes between the two bracket side plates 3031 of the metal bracket 303 after passing through the bracket connecting plate 3030.

As shown in fig. 3-4, a second implementation of the spring structure is:

the spring structure comprises a second spring 307, wherein one end of the second spring 307 is a first end of the spring, and the other end is a second end of the spring connected to the supporting structures 301-303; one end of the movable contact 311 is provided with a movable contact, and a first end of a spring is connected to a portion of the movable contact 311 located between the center line O-O and the movable contact.

Further, as shown in fig. 3 and 5, the spring structure further includes a second connecting shaft 315 disposed on the moving contact 311, two second springs 307 are disposed on two sides of the moving contact 311, two ends of the second connecting shaft 315 protrude on two sides of the moving contact 311, and first ends of the springs of the two second springs 307 are respectively connected to two ends of the second connecting shaft 315, so as to further form a limit for the moving contact 311 in the axial direction of the contact rotating shaft structure. Further, the spring structure further includes a first connecting shaft 316 and a first connecting plate 318, the axial directions of the first connecting shaft 316 and the second connecting shaft 315 are parallel to the axial direction of the rotating shaft of the moving contact 311, the first connecting shaft 316 passes through the moving contact 311, two ends of the first connecting shaft protrude from two sides of the moving contact 311 respectively, the second connecting shaft 315 is disposed in a moving contact groove of the moving contact 311, the two first connecting plates 318 are disposed on two sides of a first moving contact 3111 and a second moving contact 3112 of the moving contact 311, two ends of the first connecting plate 318 are respectively sleeved on the first connecting shaft 316 and the second connecting shaft 315, and one end of the second spring 307 is connected to the second connecting shaft 315. Further, the spring structure further includes a clip 319, and the two clips 319 are disposed on two ends of the first connecting shaft 316 and located on two sides of the moving contact 311, so as to prevent the first connecting shaft 316 from being separated from the moving contact 311.

Further, as shown in fig. 3-4 and 6, the second ends of the springs of the two second springs 307 are respectively connected to the two pressing plate sliding shafts 306, which is beneficial to simplifying the structure of the moving contact mechanism and reducing the number of parts.

It should be noted that, in the moving contact structure 35 of the present embodiment, the spring structure may adopt the first implementation manner or the second implementation manner, or both the first and second implementation manners.

Further, the two bracket side plates 3031 of the metal bracket 303 are further connected by a reinforcing shaft 313, and the reinforcing shaft 313 and the supporting base plate 3010 of the contact support 301 are located at two sides of the moving contact 311.

Further, as shown in fig. 7, the moving contact mechanism further includes a contact positioning shaft 320, the contact positioning shaft 320 includes a positioning shaft insertion end and a positioning shaft separation section, the two positioning shaft insertion ends are respectively disposed at two ends of the contact positioning shaft 320 and respectively inserted into the first moving contact 3111 and the second moving contact 3112, the positioning shaft separation section is disposed between the first moving contact 3111 and the second moving contact 3112 and respectively abuts against the first moving contact 3112 and the second moving contact 3112, and the outer diameter of the positioning shaft insertion end is smaller than that of the positioning shaft separation section.

Further, as shown in fig. 7, the moving contact mechanism further includes a supporting structure rotating shaft 321, and the two supporting structure rotating shafts 321 are respectively disposed at two sides of the supporting structures 301-303.

It should be noted that, in the description of the present utility model, the terms "upper", "lower", "left", "right", "inner", "outer", and the like indicate an orientation or a positional relationship based on that shown in the drawings or an orientation or a positional relationship conventionally put in use, and are merely for convenience of description, and do not indicate that the apparatus or element to be referred to must have a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating relative importance.

The foregoing is a further detailed description of the utility model in connection with the preferred embodiments, and it is not intended that the utility model be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the utility model, and these should be considered to be within the scope of the utility model.

Claims (13)

1. The movable contact mechanism comprises a supporting structure, a movable contact (311) and a spring structure, wherein the movable contact (311) is rotatably arranged on the supporting structure, and the spring structure is arranged between the movable contact (311) and the supporting structure; the method is characterized in that:

the supporting structure comprises a contact support (301) and a metal support (303), the supporting structure is pivoted around a central line O-O through the contact support (301), the metal support (303) is fixedly arranged on the contact support (301), and the movable contact (311) is arranged on the metal support (303) and is rotatably arranged around the central line O-O relative to the metal support (303).

2. The movable contact mechanism according to claim 1, wherein: the contact support (301) includes a pair of support side walls (3011) disposed in opposed spaced relation, the contact support (301) being pivotally disposed about a centerline O-O by the support side walls (3011); the metal bracket (303) comprises a pair of bracket side walls (3031) which are arranged at intervals, wherein the two bracket side walls (3031) are positioned between the two supporting side walls (3011), and the movable contact (311) is positioned between the two bracket side walls (3031) and is pivotally arranged on the two bracket side walls (3031).

3. The movable contact mechanism according to claim 2, wherein: the two bracket side walls (3031) are respectively in limit fit with the two supporting side walls (3011), so that the two bracket side walls (3031) only allow the two supporting side walls (3011) to enter from one direction.

4. The movable contact mechanism according to claim 2, wherein: the contact support (301) further comprises a support connecting plate (3010), and two ends of the support connecting plate (3010) are respectively connected with the two support side walls (3011) and are integrally in a U-shaped structure; the metal bracket (303) further comprises a bracket connecting plate (3030), and two ends of the bracket connecting plate (3030) are respectively connected with two bracket side walls (3031) and are integrally in a U-shaped structure.

5. The movable contact mechanism according to claim 2, wherein: the contact support (301) further comprises a support beam (3012) positioned between the two support side walls (3011), and two ends of the support beam (3012) are respectively connected with the two support side walls (3011); the bracket side wall (3031) includes a bracket side wall opening (30312), and the bracket side wall (3031) is clamped to the bracket cross beam (3012) through the bracket side wall opening (30312).

6. The movable contact mechanism according to claim 2, wherein: the movable contact mechanism also comprises a contact conducting plate (312), a contact rotating shaft structure and a contact pressure spring (308); the movable contact (311) is arranged on the contact rotating shaft structure and comprises a first movable contact (3111) and a second movable contact (3112) which are arranged side by side and synchronously rotate; the contact conducting plate (312) is arranged on the contact rotating shaft structure and is positioned between the first moving contact (3111) and the second moving contact (3112); the support side wall (3031) comprises support side wall shaft grooves (30310) arranged on the support side wall shaft grooves (30310), two ends of the contact rotating shaft structure are respectively arranged in the support side wall shaft grooves (30310) of the two support side walls (3031), two groups of contact pressure springs (308) are respectively sleeved on the contact rotating shaft structure and are positioned on two sides of the moving contact (311), and each group of contact pressure springs (308) is positioned between the moving contact (311) and the corresponding support side wall (3031).

7. The movable contact mechanism according to claim 6, wherein: the contact rotating shaft structure comprises a rotating shaft (309), a shaft sleeve (310) and a limiting ring (317) which are coaxially arranged; the shaft sleeve (310) is rotationally sleeved outside the rotating shaft (309), the moving contact (311) is rotationally arranged on the shaft sleeve (310), two limiting rings (317) are respectively arranged at two ends of the rotating shaft (309), the two limiting rings (317) are respectively positioned at the outer sides of two ends of the shaft sleeve (310) and are respectively positioned in shaft grooves (30310) on two side walls of the support, and a contact pressure spring (308) sleeved on the shaft sleeve (310) is arranged between each limiting ring (317) and the moving contact (311).

8. The movable contact mechanism according to claim 7, wherein: the contact rotating shaft structure further comprises rotating shaft positioning screws (314), and the two groups of rotating shaft positioning screws (314) sequentially penetrate through corresponding supporting side walls (3011) and bracket side walls (3031) from two sides of the supporting structure respectively and are in threaded connection with corresponding ends of the rotating shaft (309).

9. The movable contact mechanism according to claim 1, wherein: the spring structure comprises a contact pressing plate (305) and a first spring (304), wherein the contact pressing plate (305) is arranged on the metal bracket (303) in a sliding mode, the first spring (304) is arranged between one side of the contact pressing plate (305) and the metal bracket (303), the middle of the moving contact (311) is pivoted on a bracket connecting plate (3030) of the metal bracket (303) around a central line O-O, one end of the moving contact is provided with a moving contact, and the other end of the moving contact is in butt joint with the other side of the contact pressing plate (305).

10. The movable contact mechanism according to claim 9, wherein: two support side walls (3031) of the metal support (303) are respectively provided with a pressing plate chute (30311), two ends of the contact pressing plate (305) are respectively provided with a pressing plate sliding shaft (306), and the two pressing plate sliding shafts (306) are respectively arranged in the two pressing plate chutes (30311) in a sliding way and are positioned at two sides of the moving contact (311).

11. The movable contact mechanism according to claim 1, wherein: the spring structure comprises a second spring (307), one end of the second spring (307) is a first end of the spring, and the other end of the second spring (307) is a second end of the spring connected to the supporting structure; one end of the movable contact (311) is provided with a movable contact, and the first end of the spring is connected to a part of the movable contact (311) between the central line O-O and the movable contact.

12. The movable contact mechanism according to claim 11, wherein: the spring structure further comprises a contact pressing plate (305), two pressing plate sliding shafts (306) are respectively arranged at two ends of the contact pressing plate (305), two pressing plate sliding grooves (30311) are respectively formed in two support side walls (3031) of the metal support (303), the two pressing plate sliding shafts (306) are respectively arranged in the two pressing plate sliding grooves (30311) in a sliding mode, and spring second ends of the two second springs (307) are respectively connected to the two pressing plate sliding shafts (306).

13. The movable contact mechanism according to claim 11, wherein: the spring structure further comprises a second connecting shaft (315) arranged on the moving contact (311), two second springs (307) are arranged on two sides of the moving contact (311), and spring first ends of the two second springs (307) are respectively connected to two ends of the second connecting shaft (315).