CN108172475B - Contact structure of switch electric appliance - Google Patents
Contact structure of switch electric appliance Download PDFInfo
- Publication number
- CN108172475B CN108172475B CN201810006529.2A CN201810006529A CN108172475B CN 108172475 B CN108172475 B CN 108172475B CN 201810006529 A CN201810006529 A CN 201810006529A CN 108172475 B CN108172475 B CN 108172475B
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- plate
- contact
- arm
- boss
- plates
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- 230000003068 static effect Effects 0.000 claims abstract description 52
- 210000000078 claw Anatomy 0.000 claims description 61
- 238000006243 chemical reaction Methods 0.000 claims description 15
- 230000000670 limiting effect Effects 0.000 claims description 10
- 230000000903 blocking effect Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 210000001503 joint Anatomy 0.000 abstract 1
- 238000004146 energy storage Methods 0.000 description 5
- 230000002829 reductive effect Effects 0.000 description 5
- 238000005192 partition Methods 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/02—Housings; Casings; Bases; Mountings
- H01H71/0207—Mounting or assembling the different parts of the circuit breaker
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
- H01H73/02—Details
- H01H73/04—Contacts
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
- H01H73/02—Details
- H01H73/06—Housings; Casings; Bases; Mountings
Abstract
The utility model provides a contact structure of switch electrical apparatus, includes casing and setting up in the casing can overturn static contact subassembly, moving contact and operating device, operating device and moving contact are connected, drive contact and static contact subassembly contact, static contact subassembly include with casing fixed connection's support, with support articulated rocking arm to and with leg joint's housing, be equipped with on the rocking arm with moving contact complex static contact, be equipped with on the housing with casing complex hasp structure, form the constraint through housing and the base that is equipped with hasp structure, the housing not only has the effect of protecting the static contact subassembly, and when the static contact subassembly is assembled, can be convenient for screw in the support with the base after overturning static contact subassembly, effectively reduce the assembly degree of difficulty, improve production efficiency.
Description
Technical Field
The invention relates to the field of piezoelectric devices, in particular to a contact structure of a switching device.
Background
In the field of switching appliances, in particular to a plastic shell type circuit breaker, a contact structure is an important component of the switching appliance, and can break a circuit when the circuit is short-circuited, and higher breaking capacity and reliability are required, but the existing contact structure is small in size and difficult to assemble, is difficult to accurately install in a shell, is difficult to fix, is low in assembly efficiency and seriously affects production yield.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a contact structure of a switching device with simple structure and high reliability.
In order to achieve the above purpose, the invention adopts the following technical scheme:
The utility model provides a contact structure of switch electrical apparatus, includes casing and setting up in the casing can overturn static contact subassembly 200, moving contact and operating device, operating device is connected with the moving contact, drives the contact and contacts with static contact subassembly 200, static contact subassembly 200 includes support 210 with casing fixed connection, with support 210 articulated rocking arm 220 to and the housing 230 of being connected with support 210, be equipped with on the rocking arm 220 with moving contact complex static contact 221, be equipped with on the housing 230 with the hasp structure of casing complex.
Optionally, the bracket 210 is in a U shape, and includes a bottom plate 212 and two opposite inner side plates 211, the rocker arm 220 is hinged on the two inner side plates 211 through a rotation shaft 213, a reaction spring is disposed between the bottom plate 212 and the rocker arm 220, a screw boss 2151 is disposed at the bottom end of the bottom plate 212, a screw through hole 2153 matched with the screw boss 2151 is disposed in the housing, the housing 230 is in a U shape, and includes two opposite outer side plates 231, and a top plate 232 connected to the top ends of the two outer side plates 231, the bracket 210 is disposed on the inner side of the two outer side plates 231, and latch structures matched with side walls of the base 110 of the housing are disposed on the outer sides of the two outer side plates 231.
Optionally, the latch structure includes a latch claw 236 disposed on the housing 230, a slide rail groove 236b is disposed on the inner side of the side wall of the housing along the assembling direction of the static contact assembly 200, and a latch boss 233 matched with the latch claw 236 is disposed in the slide rail groove 236 b.
Optionally, the locking claw 236 is in a U-shaped structure, and includes a fixing arm 236a and an elastic arm 236d that are disposed opposite to each other, and a connecting arm 236c that is connected to bottom ends of the fixing arm 236a and the elastic arm 236d, where the fixing arm 236a is fixedly connected to the outer side plate 231 of the housing 230, the elastic arm 236d is inclined to the outside, the outer side of the elastic arm 236d is slidably engaged with the slide rail groove 236b, the top end is engaged with the locking boss 233 in a pushing manner, and an introducing inclined surface 234 engaged with the locking claw 236 is disposed at the top end of the locking boss 233.
Optionally, the bottom of the base 110 is provided with a fixing boss 2152 protruding towards the fixed contact assembly 200, the side edge of the side far away from the rocker arm 220 is provided with a limiting plate 2155 extending towards the bottom of the base 110, the top side of the fixing boss 2152 is provided with a screw through hole 2153 matched with the screw boss 2151, and a limiting groove 2155b matched with the limiting plate 2155, the edge of the opening of the top side of the screw through hole 2153 is provided with a chamfer matched with the screw boss 2151, and the bottom side of the screw through hole 2153 is provided with a screw blind hole 2154 communicated with the outer side of the base 110.
Optionally, the rotating shaft 213 is disposed between the two inner side plates 211, and extends two ends to the outer side of the inner side plate 211, an avoidance groove 235 for avoiding the end of the rotating shaft 213 is formed in the inner side of the outer side plate 231, a fixing claw 214 for fixing the outer side plate 231 is disposed below the rotating shaft 213 on the inner side plate 211, a fixing through hole 214b matched with the fixing claw 214 is formed in the bottom wall of the inner side of the avoidance groove 235, the fixing through hole 214b is communicated with the outer side of the avoidance groove 235, a locking claw 236 matched with the shell is disposed on the outer side of the avoidance groove 235, and the locking claw 236 is disposed on one side of the fixing through hole 214 b.
Optionally, the inner plate 211 is L-shaped, the inner plate 211 is provided with a side plate opening 211b, a clamping edge of the side plate opening 211b perpendicular to the assembling direction of the housing 230 is provided with a fixing claw 214 turned towards the outer side of the inner plate 211 to form a trapezoid, the top side length of the fixing claw 214 is smaller than the bottom side length, an assembling inclined plane 216 matched with the housing 230 is formed on the side surface of the fixing claw 214, the inner plate 211 is provided with a shaft hole 213b corresponding to the upper side of the side plate opening 211b, a rotating shaft 213 is arranged in the shaft hole 213b, the inner plate 211 is provided with a spring claw 211c turned inwards to form an L shape corresponding to the end surface on the right side of the rotating shaft 213, the counter force spring is a torsion spring member, the torsion spring member is sleeved on the rotating shaft 213, one end of the torsion spring member abuts against the bottom side of the spring claw 211c, and the other end of the torsion spring member abuts against the bottom side of the rocker arm 220.
Optionally, side plate inclined arms 211a are respectively arranged at the left sides of the bottom ends of the two inner side plates 211, the bottom ends of the side plate inclined arms 211a are connected through a bottom plate 212, screw bosses 2151 formed by stretching are respectively arranged at the top side and the bottom side of the bottom plate 212, and the screw bosses 2151 at the top side are arranged between the two side plate inclined arms 211 a; the two outer side plates 231 are correspondingly arranged at the outer sides of the two inner side plates 211 of the bracket 210, a protective plate 211e matched with a side plate inclined arm 211a of the bracket 210 is arranged at the bottom of the left side of the outer side plates 231, arc blocking plates 211d matched with the inner side plates 211 and the side plate inclined arm 211a are respectively arranged at the edges of the outer side plates 231 and the protective plate 211e, an extension plate 237a is arranged at the top of the right side of the outer side plates 231, the right side of the extension plate 237a is connected through an extension side plate 237b, the top side of the extension plate 237a is connected through an extension top plate 237c, the extension top plate 237c is obliquely arranged on the top plate 232 and is connected with the right side of the top plate 232, and the extension side plate 237b is correspondingly arranged above a spring claw 211c of the bracket 210
Optionally, the rocker arm 220 is L-shaped, and includes a first swing portion 222 and a second swing portion 223 that are connected, where the right side of the first swing portion 222 is disposed below the top plate 232 and is connected to the second swing portion 223, the left side extends out of the housing 230 and is provided with a rocker arm boss 225, the top side of the first swing portion 222 is correspondingly provided with a contact boss 226 between the rocker arm boss 225 and the top plate 232, the top side of the contact boss 226 is provided with a stationary contact 221, the top of the second swing portion 223 is connected to the first swing portion 222, a second shaft hole 213f is provided at the connection, a rotating shaft 213 connected to the bracket 210 is provided in the second shaft hole 213f, the bottom of the second swing portion 223 is disposed on the right side of the bottom plate 212 of the bracket 210, and the middle of the second swing portion 223 is provided with a spring slot 224 that is matched with a counter spring on the side facing the bottom plate 212.
Optionally, the reaction spring includes two coaxially disposed torsion spring members, the rocker arm 220 and the inner plates 211 on two sides of the bracket 210 are disposed at intervals, the two torsion spring members are disposed between two sides of the rocker arm 220 and the inner plates 211, and are sleeved on the rotating shaft 213, one ends of the two torsion spring members are connected and then abut against the rocker arm 220, and the other ends are connected with the bracket 210 respectively.
According to the contact structure of the switching device, the housing 230 with the locking structure and the base 110 form constraint, the housing 230 not only has the function of protecting the static contact assembly, but also can prevent the static contact assembly 200 from falling from the base 110 after the base 110 is overturned during assembly of the static contact assembly, so that screws can be conveniently screwed into the bracket 210, the assembly difficulty is effectively reduced, and the production efficiency is improved. In addition, through the slide rail groove 236b on the base 110, not only can provide guidance for assembling the static contact assembly 200, but also the locking claw 236 can be locked through the locking boss 233, and in addition, the structure is simple and the processing is convenient. In addition, the locking claw 236 with the U-shaped structure not only can be reversely buckled at the bottom side of the locking boss 233 to play a more reliable constraint role on the static contact assembly 200, but also has better elasticity, and the locking claw 236 with the U-shaped structure cannot be blocked when being matched with the sliding rail groove 236b in a sliding way, so that too great force is not required to be consumed when the locking boss 233 is blocked, and the labor intensity can be effectively reduced.
Drawings
FIG. 1 is a schematic view of the structure of the base of the present invention;
FIG. 2 is a cross-sectional view of the base of the present invention;
FIG. 3 is another cross-sectional view of the base of the present invention;
FIG. 4 is a schematic view of the structure of the stationary contact assembly of the present invention;
FIG. 5 is an exploded view of the stationary contact assembly of the present invention;
fig. 6 is a schematic structural view of the stent of the present invention.
Detailed Description
Specific embodiments of the contact structure of the switching device according to the present invention are further described below with reference to the examples shown in fig. 1 to 6. The contact structure of the switching device of the present invention is not limited to the description of the following embodiments.
As shown in fig. 1-3, a base 110 for a molded case circuit breaker is shown, the base 110 and a top case (not shown in the drawings) generally form a casing of the circuit breaker, a reversible static contact assembly 200, a moving contact, an operating mechanism, a tripping mechanism, an arc extinguishing mechanism and a connecting terminal are usually arranged in the casing, a handle connected with the operating mechanism is arranged on the top case, the static contact assembly 200 and the moving contact are respectively connected with the connecting terminals at two ends of the casing to connect into a circuit, the operating mechanism drives the moving contact to swing and separate from the static contact assembly 200 to conduct and disconnect the circuit, when the moving contact contacts are contacted with the static contact assembly 200, if the circuit is short-circuited, overloaded, phase-missing and leaked, the tripping mechanism can trigger the operating mechanism to unlock and drive the moving contact to leave the static contact assembly 200 to disconnect the circuit to realize protection, and of course, the tripping mechanism can also only have partial protection functions, such as not have overload, phase-missing and leaked protection, and in order to avoid the damage of the moving contact and the static contact assembly 200 due to the large current during the circuit short-circuit, the electric repulsive force between the moving contact and the static contact assembly 200 can not be separated in time, so that the moving contact assembly 200 can move away from the moving contact assembly to the moving structure to the moving speed.
As shown in fig. 4, the static contact assembly 200 of the present invention includes a bracket 210 screwed to the bottom of the base 110, a rocker 220 hinged to the bracket 210, and a housing 230 fixedly connected to the bracket 210, wherein the rocker 220 is provided with a static contact 221 in contact with the moving contact, the bracket 210 can be welded to a connecting terminal through a soft connection, a reaction spring (not shown in the figure) is provided between the rocker 220 and the bracket 210, the force of the reaction spring drives the rocker 220 to move toward the moving contact to ensure reliable contact engagement, when a short circuit fault occurs, the rocker 220 swings against the force of the reaction spring under the drive of electric repulsive force between the moving contact and the static contact, so as to accelerate the separation between the moving contact and the static contact, a latch structure engaged with the base 110 is provided on the housing 230, and the latch structure can restrain the assembled static contact assembly 200 in the base 110, so that the static contact assembly 200 does not drop after the base 110 is turned over, and the bracket 210 is conveniently fixed to the bottom of the base 110 by using a screw from the back of the base 110.
According to the contact structure of the switching device, the housing 230 with the locking structure and the base 110 form constraint, the housing 230 not only has the function of protecting the static contact assembly, but also can prevent the static contact assembly 200 from falling from the base 110 after the base 110 is overturned during assembly of the static contact assembly, so that screws can be conveniently screwed into the bracket 210, the assembly difficulty is effectively reduced, and the production efficiency is improved.
As shown in fig. 4-6, in one embodiment of the static contact assembly 200, the support 210 and the housing 230 are both in a U-shaped structure, the housing 230 is inversely buckled above the support 210, the rocker arm 220 and the reaction spring are disposed between the support 210 and the housing 230, specifically, the support 210 includes two opposite inner side plates 211 and a bottom plate 212 connected to the bottom ends of the two inner side plates, the bottom plate 212 is in threaded connection with the bottom of the base 110, a rotating shaft 213 is disposed between the two inner side plates 211, the rotating shaft 213 is provided with the rocker arm 220 and the reaction spring, the reaction spring is sleeved on the rotating shaft 213, one end is connected with the rocker arm 220, the other end is connected with the support 210, the housing 230 includes two opposite outer side plates 231, and a top plate 232 connected to the top ends of the two outer side plates 231 and opposite to the moving contact, the support 210 is disposed inside the two outer side plates 231, the inner side of the outer side plates 231 is fixedly connected with the inner side plates 211, a locking structure matched with the base 110 is disposed on the outer side, and the force of the reaction spring drives the rocker arm 220 to drive the static contact 221 to the bottom side of the top plate 232, so as to ensure reliable contact and matching with the moving contact. In this embodiment, the U-shaped housing 230 is disposed on the top side of the bracket 210, so that the device can not only cooperate with the base 110 to restrain the stationary contact assembly 200 during assembly, but also limit the rocker 220 and protect the rocker 220, so as to prevent the arc generated during the movement of the stationary contact assembly 200 and the moving contact from ablating the rocker 220, thereby realizing a three-stone design.
As an embodiment of the latch structure, the latch structure includes a latch claw 236 disposed on an outer side of the outer side plate 231, a slide rail groove 236b (fig. 3) is disposed on an inner side of a side wall of the base 110 along an assembling direction of the stationary contact assembly 200, a latch boss 233 mated with the latch claw 236 is disposed in the slide rail groove 236b, the latch boss 233 forms a latch groove for latching the latch claw 236 with the slide rail groove 236b on a side facing a bottom of the base 110, an introducing inclined surface 234 mated with the latch claw 236 is disposed on a top side of the latch boss 233, the introducing inclined surface 234 can reduce difficulty of the latch claw 236 being snapped into the latch groove, in case of a multi-phase circuit breaker, the base 110 forms a partition between adjacent two phases, and the slide rail groove 236b may also be disposed on the partition.
The sliding rail groove 236b on the base 110 not only can provide guidance for assembling the static contact assembly 200, but also can lock the locking claw 236 through the locking boss 233, and has the characteristics of simple structure and convenient processing. Of course, the sliding rail groove 236b may be directly disposed inside the side wall of the base 110, or the locking claw may be disposed on the base 110, the locking groove matched with the locking claw may be disposed on the housing 230, the locking claw 236 may be disposed at the bottom end of the housing 230, and the locking groove may be disposed at the bottom of the base 110 and matched with the housing 230, in addition, the three-phase circuit breaker is shown in the figure, the housing includes a side wall disposed at the outermost side, and a partition plate disposed between two adjacent phases, the sliding rail groove 236b may be disposed inside the side wall of the housing, or may be disposed at two sides of the partition plate, and the locking structure of the embodiment may be used on single-phase, two-phase and four-phase circuit breakers.
Further, referring to fig. 5, the locking claw 236 is in a U-shaped structure, which includes a fixing arm 236a and an elastic arm 236d that are disposed opposite to each other, and a connecting arm 236c that is connected to bottom ends of the fixing arm 236a and the elastic arm 236d, wherein the fixing arm 236a is fixedly connected to the outer side plate 231 of the housing 230, the connecting arm 213c is bent toward the bottom of the base 110, that is, an opening direction of the locking claw 236 is toward the top side of the base 110, and the fixing arm 236a is fixedly connected to the outer side plate 231. The locking claw 236 with the U-shaped structure not only can be reversely buckled at the bottom side of the locking boss 233 to play a more reliable constraint role on the static contact assembly 200, but also has better elasticity, and the locking claw 236 with the U-shaped structure cannot be blocked when being matched with the sliding rail groove 236b in a sliding way, so that too great force is not required to be consumed when the locking boss 233 is blocked, and the labor intensity can be effectively reduced. Of course, the locking claw 236 may be formed as a V-shaped, W-shaped or spherical boss, which is within the scope of the present invention. The elastic arm 236d is preferably inclined outwards, and is matched with the slope of the leading-in inclined plane 234 at the top side of the locking lug boss 233, so that the outer side of the elastic arm 236d is in sliding fit with the sliding rail groove 236b, the top end face is in abutting fit with the bottom end of the locking lug boss 233, the resistance is smaller and smoother during assembly, and the restraining force after assembly is more reliable.
Still further, the pivot 213 sets up between two interior side plates 211, and stretch the outside of interior side plate 211 with both ends, the middle part of exterior side plate 231 is protruding to roll over outwards and is formed the groove 235 of dodging the pivot 213 tip, interior side plate 211 is equipped with the fixed jaw 214 that is used for fixed exterior side plate 231 in the below of pivot 213, dodge be equipped with on the diapire of groove 235 inboard with fixed jaw 214 complex fixed through-hole 214b, fixed through-hole 214b and dodge the outside intercommunication at the groove 235 back of dodging, be equipped with in the outside of dodging the groove 235 with casing complex latch claw 236, latch claw 236 sets up in one side of fixed through-hole 214b, simple structure has, the characteristics of being convenient for assemble, dodge the groove 235 through dodging the groove can more compact static contact assembly 200's structure moreover, make fixed through-hole 214b have certain distance with the bending portion that produces when fixed jaw 214 processing, the degree of difficulty of reducing the assembly. The fixing claw 214 is preferably trapezoidal, and the upper and lower end surfaces thereof are abutted in the fixing through hole 214b for fixing the housing 230, and the side surface thereof is opposite to the housing 230 and is obliquely arranged, so that the claw can be conveniently clamped into the fixing through hole 214b, and the labor intensity is reduced. Of course, the fixing claws 214 may be provided on the outer plate 231, the fixing through holes 214b may be provided on the inner plate 211, and the fixing through holes 214b may be provided outside the escape grooves 235, which falls within the scope of the present invention.
Still further, the top and the bottom of bottom plate 212 all are equipped with the screw boss 2151 that becomes the tube-shape, be equipped with the screw on the inside wall of screw boss 2151, be equipped with the limiting plate 2155 that extends to base 110 bottom on the side of keeping away from rocking arm 220 one side of bottom plate 212, be equipped with the bellied fixed boss 2152 of inboard static contact subassembly 200 in the bottom of base 110, be equipped with at the top side of fixed boss 2152 with screw boss 2151 complex screw through-hole 2153, and with limiting plate 2155 complex spacing groove 2155b, screw through-hole 2153 top side open-ended edge is equipped with the chamfer with screw boss 2151 complex, screw through-hole 2153's bottom side is equipped with the screw blind hole 2154 with base 110 outside intercommunication, through set up the chamfer with screw boss 2151 cooperation on screw through-hole 2153, can play the effect of calibration and compensation to the assembly of static contact subassembly 200, guide screw boss 2151 into screw through-hole 2153, the cooperation of limiting plate 2155 and spacing groove 2155b not only can play spacing effect to static contact subassembly 200, can also prevent the direction dress of static contact subassembly 200.
As shown in fig. 6, in one embodiment of the bracket 210, the metal bracket 210 is in a U shape, and includes two opposite inner side plates 211, wherein the left sides of the bottom ends of the two inner side plates 211 are respectively provided with a side plate inclined arm 211a, the bottom ends of the side plate inclined arms 211a are connected through a bottom plate 212, the left side edge of the bottom plate 212 is provided with a limiting plate 2155 bent downwards, the top side and the bottom side of the bottom plate 212 are respectively provided with a screw boss 2151 formed by stretching, and the screw boss 2151 at the top side is arranged between the two side plate inclined arms 211 a; the inner plate 211 is L-shaped, a side plate opening 211b is provided on the inner plate 211, a trapezoidal fixing claw 214 is provided on the clamping edge of the side plate opening 211b perpendicular to the assembling direction of the housing 230, which is folded towards the outer side of the inner plate 211, the top side length of the fixing claw 214 is smaller than the bottom side length, an assembling inclined plane 216 matching with the housing 230 is formed on the side surface of the fixing claw 214, a shaft hole 213b is provided above the side plate opening 211b corresponding to the inner plate 211, a rotating shaft 213 is provided in the shaft hole 213b, the inner plate 211 is folded inwards to form an L-shaped spring claw 211c corresponding to the end surface on the right side of the rotating shaft 213, the counter force spring is a torsion spring, the torsion spring is sleeved on the rotating shaft 213, one end of the torsion spring abuts against the bottom side of the spring claw 211c, and the other end abuts against the bottom side of the rocker arm 220. The counter-force spring can also be a pressure spring, one end of which is connected with the screw boss 2151 for limiting, and the other end of which is connected with the rocker arm.
As shown in fig. 5, in one embodiment of the housing 230, the plastic housing 230 is in a U shape, and includes two opposite outer plates 231 and a top plate 232 connected to the top ends of the two outer plates 231 and opposite to the moving contact, the two outer plates 231 are correspondingly arranged on the outer sides of the two inner plates 211 of the bracket 210, a protection plate 211e matched with a side plate inclined arm 211a of the bracket 210 is arranged at the bottom of the left side of the outer plates 231, arc blocking plates 211d matched with the inner plates 211 and the side plate inclined arm 211a are respectively arranged at the edges of the outer plates 231 and the protection plate 211e, an extension plate 237a is arranged at the top of the right side of the outer plates 231, the right side of the extension plate 237a is connected through an extension side plate 237b, the top side of the extension plate 237a is connected through an extension top plate 237c, the extension top plate 237c is obliquely arranged on the top of the top plate 232 and is connected with the right side of the top plate 232, and the extension plate 237b is correspondingly arranged above a spring claw 211c of the bracket 210; the two outer side plates 231 are outwards folded and inwards formed into an avoidance groove 235 which is opposite to the inner side plate 211 of the bracket 210, the top side of the avoidance groove 235 is used for avoiding the rotating shaft 213, the bottom side of the rotating shaft 213 is provided with a fixing through hole 214b matched with the fixing claw 214 of the bracket 210, the fixing through hole 214b is arranged on the bottom wall of the avoidance groove 235 and communicated with the outer side of the back of the avoidance groove 235, and the back of the avoidance groove 235 is provided with a U-shaped locking claw 236; the latch claw 236 includes a fixed arm 236a and an elastic arm 236d which are oppositely disposed, and a connecting arm 236c which is connected to the bottom ends of the fixed arm 236a and the elastic arm 236d, the fixed arm 236a is fixedly connected to the back of the avoidance groove 235 and is adjacent to the fixing through hole 214b, the connecting arm 213c is bent toward the bottom of the base 110, the fixed arm 236a is fixedly connected to the back of the avoidance groove 235, and the elastic arm 236d is obliquely disposed and is matched with the slide rail groove 236b and the latch boss 233 of the base 110.
As shown in fig. 5, an embodiment of the rocker arm 220 is also shown, the rocker arm 220 is L-shaped, and includes a first swing portion 222 and a second swing portion 223 that are connected, one end on the right side of the first swing portion 222 is disposed below a top plate 232 of the housing 230 and is connected to the second swing portion 223, the other end on the left side extends out of the housing 230 and is provided with a rocker arm boss 225 on the top side, a contact boss 226 is correspondingly disposed on the top side of the first swing portion 222 between the rocker arm boss 225 and the top plate 232, a stationary contact 221 is disposed on the top side of the contact boss 226, and the first swing portion 222 can abut against the bottom side of the top plate 232 under the action of a counter force spring, so that the stationary contact 221 is kept at a predetermined position and can be reliably contacted with a moving contact; the top of the second swing portion 223 is connected to the first swing portion 222, a second shaft hole 213f is provided at the connection, a rotation shaft 213 connected to the bracket 210 is provided in the second shaft hole 213f, the swing arm 220 is rotatably mounted on the inner side of the bracket 210 through the rotation shaft 213, the bottom of the second swing portion 223 is provided on the right side of the bottom plate 212 of the bracket 210, and a spring groove 224 engaged with the reaction spring is provided in the middle of the second swing portion 223 on the side facing the bottom plate 212.
As an embodiment of the reaction spring, the reaction spring includes two torsion spring members (not shown in the drawing) coaxially disposed, where the rocker arm 220 is disposed at intervals with the inner side plates 211 on two sides of the bracket 210, the two torsion spring members are disposed between two sides of the rocker arm 220 and the inner side plates 211, and sleeved on the rotating shaft 213, one ends of the two torsion spring members are connected and then abut against the spring groove 224 of the rocker arm 220, and the other ends of the two torsion spring members are connected with the spring claw 211c on the bracket 210, where the reaction spring can drive the first swing portion 222 to move upwards and abut against the bottom side of the housing 230, and the reaction spring has the characteristics of simple structure, convenience in assembly, small volume and reliable action.
In the specific assembly, the assembled static contact assembly 200 is placed above the base 110, the U-shaped locking claw 236 on the housing 230 is aligned with the upper end of the sliding rail groove 236b, the static contact assembly 200 is slid into the bottom of the base 110 along the sliding rail groove 236b, the screw boss 2151 on the bracket 210 is clamped below the locking boss 233 in the sliding rail groove 236b, meanwhile, the round screw boss 2151 on the bracket 210 is embedded into the screw through hole 2153 at the bottom of the base 100, the base 110 is turned over, the bracket 210 is fastened in the base 110 by screws, the sliding rail groove 236b on the base 110 can play a vertical guiding and positioning role, the static contact assembly 200 is aligned with the screw through hole 2153 at the bottom of the base 100 quickly, the locking boss in the sliding rail groove 236b fixes the static contact assembly 200 in the base 110 by the locking boss 233 of the housing 230, when the screw is fixed on the base 110, the static contact assembly 200 cannot fall down, and the screw is conveniently screwed into the screw thread of the bracket. Quick installation of the stationary contact assembly 200 is achieved.
As one implementation mode of the operating mechanism, the operating mechanism comprises two opposite cheek plates, a jump fastener, a locking piece and an energy storage mechanism, wherein the jump fastener is pivotally arranged on the inner side of the cheek plates, the jump fastener is in lap joint with the locking piece, one end of the energy storage mechanism is provided with a handle, the other end of the energy storage mechanism is provided with an upper connecting rod and a lower connecting rod, the upper connecting rod is connected with the jump fastener, the lower connecting rod is connected with a moving contact, and the tripping mechanism can unlock the locking piece and the jump fastener; when the snap fastener is in lap joint with the snap fastener, the upper connecting rod, the lower connecting rod and the moving contact form a four-connecting-rod assembly, and the operating mechanism can drive the moving contact assembly to act through the energy storage mechanism so as to realize opening and closing; when the locking piece and the trip piece are tripped, the operating mechanism is in a free trip state, the trip piece, the locking piece, the upper connecting rod, the lower connecting rod and the moving contact component are converted into a five-connecting-rod component by a four-connecting-rod component, and before the operating mechanism completes the tripping, the energy storage mechanism can not drive the moving contact component to act.
As one implementation mode of the tripping mechanism, the tripping mechanism comprises a magnetic yoke and a cylindrical coil framework arranged on the magnetic yoke, a tripping coil connected with the magnetic yoke is arranged on the outer side of the coil framework, a movable iron core is arranged on the inner side of the coil framework, the movable iron core is matched with a tripping piece of the operating mechanism, and the tripping coil can drive the movable iron core to trigger the operating mechanism to unlock when a short circuit occurs.
The foregoing is a further detailed description of the invention in connection with the preferred embodiments, and it is not intended that the invention 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 invention, and these should be considered to be within the scope of the invention.
Claims (10)
1. The utility model provides a contact structure of switch electrical apparatus, includes casing and setting up in casing can overturn static contact subassembly (200), moving contact and operating device, operating device is connected with the moving contact, drives moving contact and static contact subassembly (200) contact, its characterized in that: the static contact assembly (200) comprises a support (210) fixedly connected with the shell, a rocker arm (220) hinged with the support (210) and a housing (230) connected with the support (210), a static contact (221) in contact fit with the moving contact is arranged on the rocker arm (220), and a locking structure matched with the shell is arranged on the housing (230).
2. The contact structure of a switching device according to claim 1, wherein: the support (210) is U-shaped, it includes bottom plate (212) and two relative medial plates (211) that set up, and rocking arm (220) are articulated on two medial plates (211) through pivot (213), are equipped with reaction spring between bottom plate (212) and rocking arm (220), and the bottom of bottom plate (212) is equipped with screw boss (2151), is equipped with in the casing with screw boss (2151) complex screw through-hole (2153), housing (230) become the U-shaped, and it includes two lateral plates (231) that set up relatively to and connect roof (232) on two lateral plates (231) top, and support (210) set up in the inboard of two lateral plates (231), are equipped with respectively in the outside of two lateral plates (231) with the lateral wall complex hasp structure of base (110) of casing.
3. The contact structure of a switching device according to claim 1, wherein: the locking structure comprises locking claws (236) arranged on a housing (230), a sliding rail groove (236 b) is formed in the inner side of the side wall of the housing along the assembly direction of the fixed contact assembly (200), and locking bosses (233) matched with the locking claws (236) are arranged in the sliding rail groove (236 b).
4. A contact structure of a switching device according to claim 3, wherein: the locking claw (236) is of a U-shaped structure and comprises a fixed arm (236 a) and an elastic arm (236 d) which are oppositely arranged, and a connecting arm (236 c) connected to the bottom ends of the fixed arm (236 a) and the elastic arm (236 d), wherein the fixed arm (236 a) is fixedly connected with an outer side plate (231) of the housing (230), the elastic arm (236 d) is inclined outwards, the outer side of the elastic arm (236 d) is in sliding fit with the sliding rail groove (236 b), the top end of the elastic arm is in abutting fit with the locking boss (233), and an introducing inclined surface (234) matched with the locking claw (236) is arranged at the top end of the locking boss (233).
5. The contact structure of a switching device according to claim 2, wherein: the bottom of base (110) is equipped with fixed boss (2152) protruding to static contact subassembly (200), and bottom plate (212) are equipped with limiting plate (2155) that extend to base (110) bottom on the side of keeping away from rocking arm (220) one side, and the top side of fixed boss (2152) is equipped with screw boss (2151) complex screw through-hole (2153) to and limiting plate (2155) complex spacing groove (2155 b), the bottom side of screw through-hole (2153) is equipped with screw blind hole (2154) with base (110) outside intercommunication.
6. The contact structure of a switching device according to claim 2, wherein: the rotating shafts (213) are arranged between the two inner side plates (211) and extend the two ends to the outer sides of the inner side plates (211), avoidance grooves (235) for avoiding the end parts of the rotating shafts (213) are formed in the inner sides of the outer side plates (231), fixing claws (214) for fixing the outer side plates (231) are arranged below the rotating shafts (213) on the inner side of the inner side plates (211), and fixing through holes (214 b) matched with the fixing claws (214) are formed in the bottom walls of the inner sides of the avoidance grooves (235).
7. The contact structure of a switching device according to claim 6, wherein: the fixing through hole (214 b) is communicated with the outer side of the avoidance groove (235), a locking claw (236) matched with the shell is arranged on the outer side of the avoidance groove (235), and the locking claw (236) is arranged on one side of the fixing through hole (214 b).
8. The contact structure of a switching device according to claim 2, wherein: the inner side plate (211) is L-shaped, a side plate opening (211 b) is arranged on the inner side plate (211), a trapezoid fixing claw (214) which is folded towards the outer side of the inner side plate (211) is arranged on a clamping edge of the side plate opening (211 b) perpendicular to the assembly direction of the housing (230), the top side length of the fixing claw (214) is smaller than the bottom side length, an assembly inclined surface (216) matched with the housing (230) is formed on the side surface of the fixing claw (214), an axle hole (213 b) is formed in the inner side plate (211) correspondingly above the side plate opening (211 b), a rotating shaft (213) is arranged in the axle hole (213 b), the inner side plate (211) is inwards folded towards the right end surface of the rotating shaft (213) to form an L-shaped spring claw (211 c), the counter force spring is a torsion spring piece, the torsion spring piece is sleeved on the rotating shaft (213), one end of the torsion spring piece is propped against the bottom side of the spring claw (211 c), and the other end of the torsion spring piece is propped against the bottom side of the rocker arm (220).
9. The contact structure of a switching device according to claim 2, wherein: the left sides of the bottom ends of the two inner side plates (211) are respectively provided with a side plate inclined arm (211 a), the bottom ends of the side plate inclined arms (211 a) are connected through a bottom plate (212), the top side and the bottom side of the bottom plate (212) are respectively provided with a screw boss (2151) formed by stretching, and the screw boss (2151) on the top side is arranged between the two side plate inclined arms (211 a); two outer side plates (231) are correspondingly arranged on the outer sides of two inner side plates (211) of a bracket (210), a protection plate (211 e) matched with a side plate inclined arm (211 a) of the bracket (210) is arranged at the bottom of the left side of the outer side plates (231), arc blocking plates (211 d) matched with the inner side plates (211) and the side plate inclined arm (211 a) are respectively arranged at the edges of the outer side plates (231) and the edges of the protection plate (211 e), an extension plate (237 a) is arranged at the top of the right side of the outer side plates (231), the right side of the extension plate (237 a) is connected through an extension top plate (237 b), the top side of the extension plate (237 a) is connected through an extension top plate (237 c), and the extension top plate (237 c) is obliquely arranged with the top plate (232) and is connected with the right side of the top plate (232), and the extension side plate (237 b) is correspondingly arranged above a spring claw (211 c) of the bracket (210).
10. The contact structure of a switching device according to claim 2, wherein: the rocker arm (220) is L-shaped and comprises a first swing part (222) and a second swing part (223) which are connected, the right side of the first swing part (222) is arranged below a top plate (232) and is connected with the second swing part (223), the left side of the first swing part extends out of a housing (230) and is provided with a rocker arm boss (225), a contact boss (226) is correspondingly arranged between the rocker arm boss (225) and the top plate (232) on the top side of the first swing part (222), a stationary contact (221) is arranged on the top side of the contact boss (226), the top of the second swing part (223) is connected with the first swing part (222), a second shaft hole (213 f) is formed in the connecting position, a rotating shaft (213) connected with the bracket (210) is arranged in the second shaft hole (213 f), the bottom of the second swing part (223) is arranged on the right side of the bottom plate (212) of the bracket (210), and a spring groove (224) matched with a counter force spring is formed in the middle of the second swing part (223) on one side facing the bottom plate (212).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810006529.2A CN108172475B (en) | 2018-01-03 | 2018-01-03 | Contact structure of switch electric appliance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810006529.2A CN108172475B (en) | 2018-01-03 | 2018-01-03 | Contact structure of switch electric appliance |
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| CN108172475A CN108172475A (en) | 2018-06-15 |
| CN108172475B true CN108172475B (en) | 2024-04-19 |
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| CN201810006529.2A Active CN108172475B (en) | 2018-01-03 | 2018-01-03 | Contact structure of switch electric appliance |
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1577689A (en) * | 2003-07-03 | 2005-02-09 | 富士电机机器制御株式会社 | External operating handle device for circuit breaker |
| JP2009259610A (en) * | 2008-04-17 | 2009-11-05 | Tempearl Ind Co Ltd | Switching mechanism for circuit breaker |
| KR20110039891A (en) * | 2009-10-12 | 2011-04-20 | 엘에스산전 주식회사 | Switching mechanism for small mold cased circuit breaker |
| CN204348658U (en) * | 2014-12-10 | 2015-05-20 | 浙江正泰电器股份有限公司 | The contact apparatus with turning fixed contact of circuit breaker and circuit breaker |
| CN104701111A (en) * | 2015-03-19 | 2015-06-10 | 河北宝凯电气有限公司 | Miniature circuit breaker capable of quickly breaking |
| CN204464204U (en) * | 2015-03-23 | 2015-07-08 | 厦门宏发开关设备有限公司 | A kind of switch disconnector of quick assembling |
| WO2015197785A1 (en) * | 2014-06-26 | 2015-12-30 | Siemens Aktiengesellschaft | Static arc-striking contact assembly and grounding switch thereof |
| CN206322649U (en) * | 2016-10-27 | 2017-07-11 | 浙江正泰电器股份有限公司 | Disconnecting switch |
| CN206340506U (en) * | 2016-11-24 | 2017-07-18 | 宁波迪尔逊电气有限公司 | A kind of miniature circuit breaker with energy storage device |
| CN207977280U (en) * | 2018-01-03 | 2018-10-16 | 浙江正泰电器股份有限公司 | The structure of contact terminal of device for switching |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103050343B (en) * | 2011-10-14 | 2015-12-16 | 上海电科电器科技有限公司 | Rapid switching-on mechanism |
| CN103177884B (en) * | 2011-12-26 | 2016-09-14 | 上海电科电器科技有限公司 | The structure of contact terminal of low-voltage electrical apparatus |
| CN104465235B (en) * | 2013-09-24 | 2016-07-06 | 上海电科电器科技有限公司 | The contact module of chopper |
-
2018
- 2018-01-03 CN CN201810006529.2A patent/CN108172475B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1577689A (en) * | 2003-07-03 | 2005-02-09 | 富士电机机器制御株式会社 | External operating handle device for circuit breaker |
| JP2009259610A (en) * | 2008-04-17 | 2009-11-05 | Tempearl Ind Co Ltd | Switching mechanism for circuit breaker |
| KR20110039891A (en) * | 2009-10-12 | 2011-04-20 | 엘에스산전 주식회사 | Switching mechanism for small mold cased circuit breaker |
| WO2015197785A1 (en) * | 2014-06-26 | 2015-12-30 | Siemens Aktiengesellschaft | Static arc-striking contact assembly and grounding switch thereof |
| CN204348658U (en) * | 2014-12-10 | 2015-05-20 | 浙江正泰电器股份有限公司 | The contact apparatus with turning fixed contact of circuit breaker and circuit breaker |
| CN104701111A (en) * | 2015-03-19 | 2015-06-10 | 河北宝凯电气有限公司 | Miniature circuit breaker capable of quickly breaking |
| CN204464204U (en) * | 2015-03-23 | 2015-07-08 | 厦门宏发开关设备有限公司 | A kind of switch disconnector of quick assembling |
| CN206322649U (en) * | 2016-10-27 | 2017-07-11 | 浙江正泰电器股份有限公司 | Disconnecting switch |
| CN206340506U (en) * | 2016-11-24 | 2017-07-18 | 宁波迪尔逊电气有限公司 | A kind of miniature circuit breaker with energy storage device |
| CN207977280U (en) * | 2018-01-03 | 2018-10-16 | 浙江正泰电器股份有限公司 | The structure of contact terminal of device for switching |
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| CN108172475A (en) | 2018-06-15 |
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