CN207165505U - A kind of anti-fall-back device of the contact of breaker - Google Patents
A kind of anti-fall-back device of the contact of breaker Download PDFInfo
- Publication number
- CN207165505U CN207165505U CN201721218418.5U CN201721218418U CN207165505U CN 207165505 U CN207165505 U CN 207165505U CN 201721218418 U CN201721218418 U CN 201721218418U CN 207165505 U CN207165505 U CN 207165505U
- Authority
- CN
- China
- Prior art keywords
- feeler lever
- movable feeler
- neck
- contact
- fall
- Prior art date
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Abstract
A kind of anti-fall-back device of contact of breaker,Include rotating shaft,Stationary contact bar,The anti-fall-back device of movable feeler lever and contact that can be rotated in rotating shaft,The anti-fall-back device of described contact includes sliding pin,Alignment pin and spring,Symmetrical structure centered on described movable feeler lever,Its symmetrical centre both ends is equipped with the anti-fall-back device of contact,Described movable feeler lever is provided with the first neck being caught in for sliding pin,The movable feeler lever both sides are provided with dividing plate,The dividing plate deviates sliding pin side and is provided with recess,Alignment pin is arranged with described recess,The movable feeler lever both sides are equipped with spring,The spring one end is connected the other end and positioning pin connection with sliding pin,The movable feeler lever is provided with towards alignment pin side and is adapted the second neck with alignment pin shape,The alignment pin position engages on the path that the second neck rotates with movable feeler lever with the second neck,The alignment pin engages with the second neck interference.
Description
Technical field
It the utility model is related to low-voltage electrical apparatus electrical power distribution apparatus field, and in particular to a kind of contact of breaker is anti-to fall dress after rise
Put.
Background technology
The contact system of breaker can be connected under the drive of operating mechanism or disjunction circuit, while is also set in breaker
There is electrical apparatus release, when circuit occurs to overload or be short-circuit, electrical apparatus release can drive operating mechanism to separate dynamic and static contact, cut-out
Circuit, play a part of protection.But the protective effect of electrical apparatus release is limited, because the action relative delay of electrical apparatus release, take off
After detaining device action, also to pass through a series of mechanical transfer process just can separate dynamic and static contact, for king-sized failure
For electric current, this reaction speed can not ensure circuit safety.
Using electrodynamic repulsion force caused by fault current separate directly dynamic and static contact, fast shut-off electricity can be reached
The purpose on road, this technology are applied in existing breaker contact system.After moving contact is denounceed out, if behaviour
Make mechanism not have enough time also acting, moving contact may fall after rise in the presence of touch spring again, again with stationary contact capitiform
Electric arc is produced into closure or between dynamic and static contact, not only influences current limitation effect, the serious scaling loss of contact can be also caused or even send out
Raw melting welding, makes fault current damage load elements.Therefore, in this contact system, it typically can all set and prevent moving contact from returning
The mechanism fallen.
Such as Chinese invention patent ZL201310016347.0, a kind of breaker contact system is disclosed, includes rotating shaft, quiet
Feeler lever, the movable feeler lever that can be rotated in rotating shaft, the anti-fall-back device of contact, the anti-fall-back device of described contact include sliding pin, institute
The movable feeler lever both sides stated are provided with spring, and described spring one end is connected with sliding pin, and the other end is connected with rotating shaft, described movable feeler lever
The neck being caught in for sliding pin is provided with, described movable feeler lever both sides are provided with dividing plate, and corresponding to sliding pin side on described dividing plate is provided with
First guide surface, the second guide surface, it is provided between described the first guide surface and the second guide surface and stops projection, described is dynamic tactile
Symmetrical structure centered on bar, its symmetrical centre both ends are equipped with the anti-fall-back device of contact, it is characterised in that：Described movable feeler lever two
Side is provided with positioning drawing plate, and described positioning drawing plate both ends are equipped with slotted hole, the slotted hole difference at described positioning drawing plate both ends
It is set on the sliding pin in the anti-fall-back device of contact of movable feeler lever both sides, described positioning drawing plate, movable feeler lever and dividing plate are coaxially cut with scissors
Connect.
The anti-fall-back device of contact is provided with dividing plate 5 by the both sides of movable feeler lever 3 in the documents of reference, on described dividing plate 5
The corresponding side of sliding pin 41 is provided with the first guide surface 51, the second guide surface 52, described the first guide surface 51 and the second guide surface 52
Between be provided with stop projection 53 setting, using movable feeler lever 3, stationary contact bar 2 reprimand open when, sliding pin 41 moves with movable feeler lever 3, sliding pin 41
The second guide surface 52 is moved to along the first guide surface 51, stops that projection 53 can hinder sliding pin 41 from the second guide surface 52 to first
Guide surface 51 is moved, i.e., the falling that stop projection 53 can be to movable feeler lever 3, which is formed, to be hindered, and reaching prevents asking for moving contact falling
Topic.
But the breaker contact system of this structure the problem of existing, is：When high short circuit current occurs for circuit, wink
When electric current produce high temperature, conducted through movable feeler lever to sliding pin and dividing plate is adjacent to, on the market the rotating shaft in general technology and dividing plate
Generally it is wholely set, and rotating shaft generally use plastic material, when in face of the high temperature of failed shorted electric current, movable feeler lever uses in itself
Contact material, with good resistance to electrical wear, anti-melting welding, electrical and thermal conductivity, but conventional sliding pin and dividing plate do not have
High temperature resists molten property, thus causes the stop on high temperature melt dividing plate raised, causes the guide surface of dividing plate second that size occurs and becomes
Shape, or even failure, the whole anti-fall-back device failure of contact, moving contact debris removal fall contact static contact after rise.
The content of the invention
The utility model is in order to solve the deficiency of above-mentioned technology, there is provided a kind of contact of breaker fall-proofing device, in face
To during high temperature, effectively preventing high temperature from causing anti-fall-back device to melt deformation failure caused by current failure, contact system is protected.
The technical scheme of this real utility model：A kind of anti-fall-back device of contact of breaker, include rotating shaft, stationary contact bar, can
The anti-fall-back device of movable feeler lever and contact rotated in rotating shaft, the anti-fall-back device of described contact include sliding pin, alignment pin and
Spring, symmetrical structure centered on described movable feeler lever, its symmetrical centre both ends are equipped with the anti-fall-back device of contact, described dynamic to touch
Bar is provided with the first neck being caught in for sliding pin, and the movable feeler lever both sides are provided with dividing plate, and the dividing plate deviates sliding pin side provided with recessed
Mouthful, alignment pin is arranged with described recess, the movable feeler lever both sides are equipped with spring, and the spring one end is connected separately with sliding pin
One end and positioning pin connection, the movable feeler lever is provided with towards alignment pin side and is adapted the second neck with alignment pin shape, described
Alignment pin position engages on the path that the second neck rotates with movable feeler lever with the second neck, the alignment pin and the second neck
Interference engages.
Using above-mentioned technical proposal, mutually fitted with alignment pin shape by being provided with the movable feeler lever towards alignment pin side
With the second neck, when the electrodynamic repulsion force of fault current opens moving contact reprimand, movable feeler lever is rotated relative to rotating shaft, and the second neck is servo-actuated
Feeler lever rotation is close to alignment pin, and because alignment pin is preset on the path of the second neck rotation process, therefore the action of the second neck must
The default alignment pin fixed is so met with, now because the second neck shape is adapted with alignment pin shape and energy interference engaging, the
After two draw-in groove is engaged using repulsion with alignment pin, even if repulsion disappears, in the presence of interference engaging, the second neck and alignment pin
It can not be separated in the case where no external force acts on, reach the situation for preventing that movable feeler lever from falling after rise, and because the second neck opens up
In on movable feeler lever, directly it is molded using the contact material of movable feeler lever, with good resistance to electrical wear, resistance fusion welding, it is not necessary to
Worrying the high temperature of failed shorted electric current makes anti-fall-back device melt deformation failure, being capable of reliably protecting contact system.
It is of the present utility model further to set：In between the central point that the alignment pin and movable feeler lever rotate in rotating shaft
The heart is away from the centre-to-centre spacing between the central point rotated equal to the second neck and movable feeler lever in rotating shaft, the alignment pin is with movable feeler lever
The track of rotation passes in and out the second neck.
Using above-mentioned technical proposal, the centre-to-centre spacing between the central point that the alignment pin and movable feeler lever are rotated in rotating shaft
Setting value, the centre-to-centre spacing setting value between the central point rotated equal to the second neck and movable feeler lever in rotating shaft so that alignment pin
It is placed exactly on the track that the second neck is rotated in rotating shaft with movable feeler lever, when both lower positions of repulsion effect are harmonious, alignment pin
The second neck interference engaging is absorbed in, prevents movable feeler lever from falling after rise, when both lower positions of external force effect separate, the second neck leaves positioning
Pin, movable feeler lever fall moving contact, static contact contact homing after rise.
Of the present utility model further to set, the dividing plate is in circular arc planar towards the end face of sliding pin, and the arc surface is located at
Sliding pin is slidably matched towards spring side and with sliding pin.
Using above-mentioned technical proposal, sliding pin this because of both ends simultaneously by spring tension and stage casing the engaging with the first neck against
Power, two bursts of power are cancelled out each other holding balance, and it is in circular arc planar that the dividing plate in movable feeler lever both sides is set towards the end face of sliding pin, the circle
Cambered surface is located at sliding pin and is slidably matched towards spring side and with sliding pin, allow sliding pin both ends have entity against, and can and arc surface
Smooth cooperation, the motion of sliding pin is not interfered with, and if side spring failure or aging, cause both ends pulling force uneven
When, if not changing arc surface against sliding pin disequilibrium can be allowed to be subjected to displacement, cause the situation that rotating shaft is stuck.
It is of the present utility model further to set：The dividing plate arc surface is in same in the central point of rotating shaft internal rotation with movable feeler lever
Axle is set, and the arc surface and sliding pin outer peripheral face are tangent, and the sliding pin rotates along arc surface surface with movable feeler lever.
Using above-mentioned technical proposal, by the way that dividing plate arc surface and central point of the movable feeler lever in rotating shaft internal rotation are set in coaxial
Put, the arc surface can be tangent with sliding pin outer peripheral face, causes sliding pin motion even if so setting, arc surface can contradict cunning all the time
Pin, sliding pin is allowed to have an abutment face no matter which position be in.
It is of the present utility model further to set：Rotating hole, spindle central point are provided with the rotary middle point of the movable feeler lever
Provided with rivet and rivet hole, the rivet is through rivet hole and rotating hole for movable feeler lever and rotating shaft coaxial rotating.
Using above-mentioned technical proposal so that what movable feeler lever can be stablized rotates relative to rotating shaft.
It is of the present utility model further to set：The rotating hole is in waist-shaped hole shape, the inner wall edge of second neck with
Movable feeler lever surface joining place is in arc transition.
Using above-mentioned technical proposal, rotating hole is arranged to waist-shaped hole, by the inner wall edge of the second neck and movable feeler lever table
Face joining place is arranged to arc transition, even if alignment pin is not positioned exactly on the running track of the second neck, alignment pin can not
When being just caught in the second neck but being resisted against at the edge junction of the second neck, by the arc transition at edge junction with
The contact of alignment pin, drive movable feeler lever to produce certain Bit Shift that allows with respect to rivet using waist-shaped hole, allow alignment pin can be along
Arc transition is slipped into the second neck, realizes the function of self position adjustment.
Brief description of the drawings
Fig. 1 is the structure chart of the utility model embodiment；
Fig. 2 is the anti-falling structure graph of the utility model embodiment；
Fig. 3 is the exploded view of the utility model embodiment；
Fig. 4 is the movable feeler lever structure chart of the utility model embodiment；
Fig. 5 is the profile of the utility model embodiment.
Embodiment
The anti-fall-back device 4 of a kind of contact of breaker as Figure 1-5, include rotating shaft 1, stationary contact bar 2, can be in rotating shaft 1
The anti-fall-back device 4 of movable feeler lever 3 and contact of rotation, the anti-fall-back device 4 of described contact include sliding pin 41, alignment pin 42 and bullet
Spring 43, symmetrical structure centered on described movable feeler lever 3, its symmetrical centre both ends are equipped with the anti-fall-back device 4 of contact, and described is dynamic
Feeler lever 3 is provided with the first neck 31 being caught in for sliding pin 41, and the both sides of movable feeler lever 3 are provided with dividing plate 11, and the dividing plate 11, which deviates, to be slided
The side of pin 41 is provided with recess 12, and alignment pin 42 is arranged with described recess 12, and the both sides of movable feeler lever 3 are equipped with spring 43,
Described one end of spring 43 is connected the other end with sliding pin 41 and is connected with alignment pin 42, and the movable feeler lever 3 is set towards the side of alignment pin 42
Have and the second neck 32 is adapted with the shape of alignment pin 42, the position of alignment pin 42 rotates located at the second neck 32 with movable feeler lever 3
Path on engage with the second neck 32, the alignment pin 42 engages with the interference of the second neck 32.
The second neck 32 is adapted with the shape of alignment pin 42 by being provided with the movable feeler lever 3 towards the side of alignment pin 42,
When the electrodynamic repulsion force of fault current opens moving contact, static contact reprimand, movable feeler lever 3 rotates relative to rotating shaft 1, and the second neck 32 is servo-actuated
Feeler lever 3 is rotated close to alignment pin 42, is rotated because alignment pin 42 is preset in into the second neck 32 on the path of process, therefore the second neck
32 actions necessarily meet with the default alignment pin 42 fixed, now because the shape of the second neck 32 is adapted with the shape of alignment pin 42 and
Energy interference engaging, after the second neck 32 is engaged using repulsion with alignment pin 42, even if repulsion disappears, in the effect of interference engaging
Under, the second neck 32 can not separate with alignment pin 42 in the case where no external force acts on, and having reached prevents what movable feeler lever 3 from falling after rise
Situation, and because the second neck 32 is opened on movable feeler lever 3, be directly molded using the contact material of movable feeler lever 3, with good
Good resistance to electrical wear, resistance fusion welding, it is not necessary to which worrying the high temperature of failed shorted electric current makes anti-fall-back device melt deformation failure, can
Reliably protecting contact system.
Centre-to-centre spacing between the central point that the alignment pin 42 and movable feeler lever 3 rotate in rotating shaft 1, equal to the second neck 32
Centre-to-centre spacing between the central point rotated with movable feeler lever 3 in rotating shaft 1, the track that the alignment pin 42 rotates with movable feeler lever 3 is entered
Go out the second neck 32.
Centre-to-centre spacing setting value between the central point that the alignment pin 42 and movable feeler lever 3 are rotated in rotating shaft 1, equal to the
Centre-to-centre spacing setting value between the central point that two draw-in groove 32 and movable feeler lever 3 rotate in rotating shaft 1 so that alignment pin 42 is placed exactly in
Second neck 32 is with movable feeler lever 3 on the interior track rotated of rotating shaft 1, and when both lower positions of repulsion effect are harmonious, alignment pin 42 is sunken
Enter the interference of the second neck 32 engaging, prevent movable feeler lever 3 from falling after rise, when both lower positions of external force effect separate, the second neck 32 leaves
Alignment pin 42, movable feeler lever 3 fall moving contact, static contact contact homing after rise.
The dividing plate 11 is in the shape of arc surface 13 towards the end face of sliding pin 41, and the arc surface 13 is located at sliding pin 41 towards spring 43
Side is simultaneously slidably matched with sliding pin 41.
Sliding pin 41 because of both ends simultaneously by the pulling force of spring 43 and stage casing the engaging with the first neck 31 against power, two bursts of power phases
Mutually offset and keep balance, it is in the shape of arc surface 13 that the dividing plate 11 in the both sides of movable feeler lever 3 is set towards the end face of sliding pin 41, the arc surface
13 are slidably matched positioned at sliding pin 41 towards the side of spring 43 and with sliding pin 41, allow the both ends of sliding pin 41 to have entity against and can be with
The smooth cooperation of arc surface 13, the motion of sliding pin 41 is not interfered with, and if a lateral spring 43 fails or aging, cause both ends
During pulling force imbalance, if the arc surface 13 is not against can allow the disequilibrium of sliding pin 41 to be subjected to displacement, cause rotating shaft 1 stuck
Situation.
The arc surface 13 of dividing plate 11 is in be coaxially disposed in the central point of the internal rotation of rotating shaft 1 with movable feeler lever 3, the arc surface 13
Tangent with the outer peripheral face of sliding pin 41, the sliding pin 41 rotates along the surface of arc surface 13 with movable feeler lever 3.
By by the arc surface 13 of dividing plate 11 and movable feeler lever 3 the internal rotation of rotating shaft 1 central point in being coaxially disposed, the arc surface
13 can be tangent with the outer peripheral face of sliding pin 41, even if so setting sliding pin 41 is moved, arc surface 13 can contradict sliding pin all the time
41, allowing sliding pin 41, there is an abutment face both sides no matter which position be in.
Rotating hole 33 is provided with the rotary middle point of the movable feeler lever 3, the central point of rotating shaft 1 is provided with rivet 15 and rivet hole
16, the rivet 15 is through rivet hole 16 and rotating hole 33 for movable feeler lever 3 and the coaxial rotating of rotating shaft 1.
Enable movable feeler lever 3 stablize rotated relative to rotating shaft 1.
The rotating hole 33 is in waist-shaped hole shape, and inner wall edge and the surface joining place of movable feeler lever 3 of second neck 32 are in
Arc transition 36.
Rotating hole 33 is arranged to waist-shaped hole, the inner wall edge of the second neck 32 and the surface joining place of movable feeler lever 3 are set
For arc transition 36, even if alignment pin 42 is not positioned exactly on the running track of the second neck 32, alignment pin 42 can not be just
When being caught in the second neck 32 but being resisted against at the edge junction of the second neck 32, pass through the arc transition 36 at edge junction
With the contact of alignment pin 42, drive movable feeler lever 3 to produce certain Bit Shift that allows with respect to rivet 15 using waist-shaped hole, allow alignment pin 42
It can be slipped into along arc transition 36 in second neck 32, realize the function of self position adjustment.Breaker makes for a long time simultaneously
During, moving contact can wear with static contact because of electric current, if there is moving contact while abrasion be able to not can be abutted against with static contact
Tactile situation, when movable feeler lever falls after rise, the relative automatic position adjusting function in waist-shaped hole of rivet 15, movable feeler lever is set to occur with respect to rivet 15
Certain displacement, until moving contact touches static contact, caused active force stops the displacement of relative rivet 15 by movable feeler lever, ensured
Moving contact and static contact reliable contacts.
Claims (6)
1. a kind of anti-fall-back device of the contact of breaker, include rotating shaft, stationary contact bar, the movable feeler lever that can be rotated in rotating shaft and touch
Anti- fall-back device, the anti-fall-back device of described contact include sliding pin, alignment pin and spring, right centered on described movable feeler lever
Claim structure, its symmetrical centre both ends is equipped with the anti-fall-back device of contact, and described movable feeler lever is provided with first be caught in for sliding pin
Neck, the movable feeler lever both sides are provided with dividing plate, and the dividing plate deviates sliding pin side and is provided with recess, and positioning is arranged with described recess
Pin, the movable feeler lever both sides are equipped with spring, and the spring one end is connected the other end and positioning pin connection with sliding pin, and its feature exists
In：The movable feeler lever is provided with towards alignment pin side and the second neck is adapted with alignment pin shape, and the alignment pin position is located at
Engage on the path that second neck rotates with movable feeler lever with the second neck, the alignment pin engages with the second neck interference.
A kind of 2. anti-fall-back device of contact of breaker according to claim 1, it is characterised in that：The alignment pin is with moving
Centre-to-centre spacing between the central point that feeler lever rotates in rotating shaft, the central point rotated equal to the second neck and movable feeler lever in rotating shaft
Between centre-to-centre spacing, the track that the alignment pin is rotated with movable feeler lever passes in and out the second neck.
A kind of 3. anti-fall-back device of contact of breaker according to claim 1 or 2, it is characterised in that：The dividing plate direction
The end face of sliding pin is in circular arc planar, and the arc surface is located at sliding pin and is slidably matched towards spring side and with sliding pin.
A kind of 4. anti-fall-back device of contact of breaker according to claim 3, it is characterised in that：The dividing plate arc surface
With movable feeler lever rotating shaft internal rotation central point in being coaxially disposed, the arc surface and sliding pin outer peripheral face are tangent, and the sliding pin is along justifying
Cambered surface surface rotates with movable feeler lever.
A kind of 5. anti-fall-back device of contact of breaker according to claim 1 or 2, it is characterised in that：The movable feeler lever
Rotary middle point at be provided with rotating hole, spindle central point is provided with rivet and rivet hole, and the rivet passes through rivet hole and rotating hole
For movable feeler lever and rotating shaft coaxial rotating.
A kind of 6. anti-fall-back device of contact of breaker according to claim 5, it is characterised in that：The rotating hole is in waist
Type hole shape, inner wall edge and the movable feeler lever surface joining place of second neck are in arc transition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721218418.5U CN207165505U (en) | 2017-09-21 | 2017-09-21 | A kind of anti-fall-back device of the contact of breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721218418.5U CN207165505U (en) | 2017-09-21 | 2017-09-21 | A kind of anti-fall-back device of the contact of breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207165505U true CN207165505U (en) | 2018-03-30 |
Family
ID=61723582
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721218418.5U Expired - Fee Related CN207165505U (en) | 2017-09-21 | 2017-09-21 | A kind of anti-fall-back device of the contact of breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207165505U (en) |
-
2017
- 2017-09-21 CN CN201721218418.5U patent/CN207165505U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180330 Termination date: 20180921 |