CN201773792U - Movable contact mechanism of circuit breaker - Google Patents
Movable contact mechanism of circuit breaker Download PDFInfo
- Publication number
- CN201773792U CN201773792U CN2010202658944U CN201020265894U CN201773792U CN 201773792 U CN201773792 U CN 201773792U CN 2010202658944 U CN2010202658944 U CN 2010202658944U CN 201020265894 U CN201020265894 U CN 201020265894U CN 201773792 U CN201773792 U CN 201773792U
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- CN
- China
- Prior art keywords
- support bar
- axostylus axostyle
- circuit breaker
- lever
- arm
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- Expired - Lifetime
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Abstract
The utility model relates to a movable contact mechanism of a circuit breaker, and comprises a rotating shaft used for driving supporting rods, a plurality of supporting rods, Y-shaped contact levers and a plurality of elastic elements; vertical holes are formed at the upper parts of the supporting rods, and horizontal holes are formed at the lower parts; the supporting rods are in rotational connection with the rotating shaft through a shaft passing through the horizontal holes at the lower parts; the Y-shaped contact levers are identical with the supporting rods in number and are composed of U-shaped arms and shaft levers; contacts are arranged on two arms of each U-shaped arm; the shaft levers are inserted in the vertical holes of the supporting rods and are in rotational connection with the supporting rods; one ends of the elastic elements are connected to the shaft levers of the Y-shaped contact levers or the supporting rods, the other ends are connected to the rotating shaft; and the rotating shaft drives the supporting rods to rotate through the elastic elements. The utility model has the advantages that the form is simple, and the mounting and the maintenance are convenient; and especially, the utility model has the self-balancing capability of terminal pressure of a double break contact, thereby effectively solving the problem that the electric conductivity of the double break contact becomes worse and worse during use.
Description
Technical field
The utility model relates to a kind of movable contact mechanism of current-limiting type circuit breaker, belongs to the low-voltage electrical apparatus field.
Background technology
In the low-voltage circuit breaker technical field, improve short circuit breaking capacity and always be a difficult problem.For traditional circuit breaker, only structure is being done under the local situation of changing, if improve breaking capacity, can be by increasing the distance of opening of circuit breaker, the method that promptly increases arcing length raising arc resistance increases current limiting capacity, thereby realizes improving the purpose of circuit breaker breaking capacity.But the development trend of circuit breaker tends to miniaturization, densification day by day.How do not increase and improve focus, the emphasis problem that breaking capacity has become research under the anti-trend that subtracts at the circuit breaker volume.
Some product has adopted the single armed bipitch structure in the world at present, and this structure increases arcing length to a certain extent, has improved current limiting capacity under the prerequisite that does not increase size.But its in use two contact abrasion conditions differ, and therefore can bring the unbalanced situation of end pressure, cause contact resistance to increase the problem of circuit breaker decreased performance then.
Also have some products to take both arms double end bridge architecture, have the joint device to connect in the middle of two arms, can the balance end pressure, solve the contact resistance problem of unstable, but this type of version complexity, installation and maintenance are all inconvenient.
The utility model content
Based on the problems referred to above, the purpose of this utility model provides a kind of movable contact mechanism of current-limiting type circuit breaker, it adopts the two contacts with balance end pressure function simple in structure, easy for installation, to solve contact contact problem of unstable, thereby can under the condition that overall dimension does not increase, improve the circuit breaker breaking capacity.
The technical solution adopted in the utility model is:
A kind of movable contact mechanism of circuit breaker is characterized in that comprising: a rotating shaft is used to drive support bar; Some support bars, vertical core is opened on the top of this support bar, and cross-drilled hole is opened in the bottom, and each support bar is rotationally connected with described rotating shaft by the axle that is through at its underpart cross-drilled hole; With the Y shape contact lever that is made of U-shaped arm and axostylus axostyle of support bar equivalent, two arms of U-shaped arm are provided with the contact, and axostylus axostyle inserts in the vertical core of described support bar and is rotationally connected with support bar; Plurality of elastic element, an end of flexible member are connected on the axostylus axostyle of described Y shape contact lever or on the support bar, the other end is connected in the described rotating shaft; Rotating shaft drives each support bar by flexible member and rotates.
Described flexible member is for placing side by side double torsion spring, and it comprises turns round arm and turn round arm down, time turn round arm to be connected in the described rotating shaft, on turn round on the axostylus axostyle that arm is embedded in described Y shape contact lever or on the support bar.
The middle part of described support bar laterally has the groove that connects with the vertical core on support bar top; On the axostylus axostyle of described Y type contact lever after axostylus axostyle inserts the vertical core of support bar with support bar on the groove corresponding position have annular groove; Turn round the groove on the arm embedding support bar on the described torsion spring, and be stuck in the annular groove of axostylus axostyle.
The middle part of described support bar laterally has the pin-and-hole that connects with the vertical core on support bar top; The middle part of described support bar laterally has groove; On the axostylus axostyle of described Y type contact lever after axostylus axostyle inserts the vertical core of support bar with support bar on the pin-and-hole corresponding position have annular groove; Described Y type contact lever by inserting support bar pin-and-hole and the pin and the support bar of the annular groove of axostylus axostyle be rotationally connected; Turn round on the described torsion spring in the groove that arm is stuck in support bar.
Have the shaft shoulder on the axostylus axostyle of described Y shape contact lever, insert and put spring leaf between the armpit of this shaft shoulder and the upper surface of support bar.
The bottom of described support bar connects lever by bearing pin, and this lever is used to pull support bar disjunction contact.The bottom of described support bar is provided with boss, and when lever forwarded certain angle to, this boss contacted with the seamed edge of lever.
The U type arm middle part of described Y type contact lever has axis hole, and axostylus axostyle is rigidly connected by this axis hole and U type arm.
Described axostylus axostyle is riveted, is threaded or welded with U type arm.
Compared with prior art, the form that the utility model has the advantages that is simple, easy for installation, particularly has double break contact end pressure self-balancing function, and the conductivity that can effectively solve double break contact is worse and worse problem in use.
Description of drawings
Fig. 1 is the axis side view of the utility model embodiment one;
Fig. 2 is the sectional structure chart of the utility model embodiment one;
Fig. 3 is the support bar axis side view of the utility model embodiment one;
Fig. 4 is the axis side view of the utility model Y shape contact lever;
Fig. 5 is the axis side view of the utility model spring;
Fig. 6 is the axis side view of the U-shaped arm of the utility model Y shape contact lever;
Fig. 7 is the axis side view of the axostylus axostyle of the utility model Y shape contact lever;
Fig. 8 increases the axis side view of the support bar of feature for the utility model;
Fig. 9 is the axis side view of the application examples of the support bar of the utility model increase feature;
Figure 10 is the sectional structure chart of the application examples of the support bar of the utility model increase feature;
Figure 11 is the sectional structure chart of the utility model embodiment two;
Figure 12 is the support bar axis side view of the utility model embodiment two.
Embodiment
Have insulation and mould in the current limiting circuit breaker of shell a kind of, contain usually: at least one fixed contact that is used for each utmost point divides and at least one movable contact portion, and when breaker closing/disconnection, these contact portions can be interconnected/disconnect; Mechanism, it is provided for making the energy of described movable contact portion motion, and determines being connected/disconnecting of described movable contact portion and corresponding fixed contact branch, and this mechanism comprises the rotating shaft that every utmost point links to each other with movable contact portion.
The utility model relates to the movable contact mechanism in this circuit breaker, and it comprises: a rotating shaft is used to drive support bar; Some support bars, vertical core is opened on the top of this support bar, and cross-drilled hole is opened in the bottom, and each support bar is rotationally connected with described rotating shaft by the axle that is through at its underpart cross-drilled hole; With the Y shape contact lever that is made of U-shaped arm and axostylus axostyle of support bar equivalent, two arms of U-shaped arm are provided with the contact, and axostylus axostyle inserts in the vertical core of described support bar and is rotationally connected with support bar; Some torsion springs, an end of torsion spring are connected on the axostylus axostyle of described Y shape contact lever or on the support bar, the other end is connected in the described rotating shaft; Rotating shaft drives each support bar by torsion spring and rotates.
The utility model is described in further detail below in conjunction with accompanying drawing.
Embodiment one
As shown in Figure 1, the movable contact portion of the utility model current limiting circuit breaker comprises 3 support bars 1, axle 2,4,3 springs 5 of 3,3 Y shape contact levers of rotating shaft.Wherein:
See Fig. 3, vertical core 12 is opened on the top of support bar 1, and cross-drilled hole 11 is opened in the bottom, and vertical core 12 and cross-drilled hole 11 is basic vertical mutually, sees Fig. 2, and the axle 2 of support bar 1 by penetrating its cross-drilled hole 11 is connected with rotating shaft 3, and support bar 1 can be that center of rotation is with respect to rotating shaft 3 rotations with axle 2.
See Fig. 4, Y shape contact lever 4 is made of U-shaped arm 42 and axostylus axostyle 43, and two arms of U-shaped arm 42 are provided with the fixed contact of circuit breaker and divide the contact 41 that contacts.See Fig. 6, wherein the cylindrical hole 421 of U type contact arm 42 is connected to become a rigid unitary with axostylus axostyle 43 riveteds, and its connected mode also available mode that is threaded or welds except that riveted joint reaches rigidly connected purpose.Be rotationally connected with support bar 1 in the vertical core 12 of the axostylus axostyle 43 insertion support bars 1 of Y shape contact lever 4, Y shape contact lever 4 can rotate around the center line of vertical core 12, and it is in a basic balance to help realizing that it presses power to the fixed contact tap.
See Fig. 3, the middle part of support bar 1 laterally has the groove 15 that the vertical core 12 with support bar top connects.See Fig. 7, have annular groove 431 on the axostylus axostyle 43 of Y type contact lever, the position of this annular groove 431 is corresponding with the groove 15 on the support bar in vertical core 12 backs that axostylus axostyle 43 inserts support bar.See Fig. 5, the version of spring 5 is for placing side by side double torsion spring, and it comprises turning round under arm 511 and two turns round arm 512.
During installation, the axostylus axostyle 43 of Y shape contact lever 4 is inserted in the vertical core 12 of support bar 1, embed groove 15 on the support bars turning round arm 511 on the spring 5, and be stuck in the annular groove 431 of axostylus axostyle 43, make again and turn round under two of spring 5 on the boss 31 that arm 512 is stuck in rotating shaft 3 (Fig. 2).Make spring 5 be in the compressed energy-storage state like this, its axle 43 to Y shape contact lever 4 has applied certain pressure, can guarantee that axle 43 can be owing to reasons such as vibration are deviate from the hole 12 of support bar 1, can when Y shape contact lever 4 rotates with axostylus axostyle 43, have certain rotary resistance again, support bar 1 flexibly can also be pressed in the rotating shaft 3.
The utility model adopts the form of series connection double break point that circuit breaker is carried out current limliting, its current limliting process is as follows: when circuit breaker disjunction or mechanism thread off, separate with the fixed contact branch contact 41 of Y shape contact lever 4, its contact 41 respectively and the generation electric arc of fixed contact between dividing, and these two sections electric arcs are separate and insulation, so, arcing length just increases to the twice of common single-break arcing length, the also corresponding twice that is increased to of arc resistance, so just limit the fault current in the loop effectively, improved the current limiting capacity of circuit breaker effectively.
In addition, see also Fig. 8-Figure 10, also can set up pin-and-hole 13 and boss 14 in the bottom of support bar 1, pin-and-hole 13 is parallel with cross-drilled hole 11.With corresponding hole on pin-and-hole 13 on the bearing pin connection support bar 1 and the lever 6, making lever 6 is that rotating shaft is rotated with respect to support bar 1 with pin-and-hole 13, and this lever is used to pull support bar 1 disjunction contact.When lever 6 forwarded certain angle to, boss 14 contacted with a seamed edge on the lever 6.The state that closes at circuit breaker, apply the power perpendicular to the face on the lever 6 61 by end to lever 6, corresponding support bar 1 phase countershaft 3 is rotated, rotate, realize movable contact portion and separating that fixed contact divides thereby drive corresponding Y shape contact lever 4.This kind structure can cooperate electromagnetic starter to be used for selectivity circuit breaker main conductive circuit, realizes that the short time delay protection starts function.
Embodiment two
See Figure 12, the difference of embodiment two and embodiment one is that the middle part of support bar 1 laterally has the pin-and-hole 14 that the vertical core 12 with support bar top connects, and groove 15 does not run through with vertical core 12.Turn round on the spring 5 in the groove 15 that arm 511 is stuck in support bar 1, the axostylus axostyle 43 of Y shape contact lever 4 is inserted in the vertical core 12 of support bar 1, the annular groove 431 of axostylus axostyle 43 aligns with pin-and-hole 14 on the support bar 1, and connects by bearing pin, prevents to deviate from the pin-and-hole 14 of axostylus axostyle 43 from support bar 1.Wherein support bar 1 also can not be provided with groove 15, and spring 5 directly is pressed on the support bar also can realize same function.Other sets up spring leaf 7, and spring leaf 7 is folded between the upper surface 16 of the armpit of the shaft shoulder 432 of axostylus axostyle 43 and support bar 1, the upper surface 16 of spring leaf 7 one end in contact support bars 1, the armpit of the shaft shoulder 432 of other end contact axostylus axostyle 43.Can make axostylus axostyle 43 and support bar 1 respectively bear certain contact pressure like this, have suitable rotary resistance when axostylus axostyle 43 is rotated with respect to support bar 1.
The foregoing description does not constitute any type of restriction to the desired protection range of the utility model, and claims of the present utility model have covered all modifications and changes.
Claims (9)
1. the movable contact mechanism of a circuit breaker is characterized in that:
A rotating shaft is used to drive support bar;
Some support bars, vertical core is opened on the top of this support bar, and cross-drilled hole is opened in the bottom, and each support bar is rotationally connected with described rotating shaft by the axle that is through at its underpart cross-drilled hole;
Y shape contact lever with support bar equivalent which is provided with the contact, and its axostylus axostyle inserts in the vertical core of described support bar and is rotationally connected with support bar;
Plurality of elastic element, an end of flexible member are connected on the axostylus axostyle of described Y shape contact lever or on the support bar, the other end is connected in the described rotating shaft;
Rotating shaft drives each support bar action by flexible member.
2. the movable contact mechanism of circuit breaker as claimed in claim 1 is characterized in that:
Described flexible member is for placing side by side double torsion spring, and it comprises turns round arm and turn round arm down, time turn round arm to be connected in the described rotating shaft, on turn round on the axostylus axostyle that arm is embedded in described Y shape contact lever or on the support bar.
3. the movable contact mechanism of circuit breaker as claimed in claim 2 is characterized in that:
The middle part of described support bar laterally has the groove that connects with the vertical core on support bar top;
On the axostylus axostyle of described Y type contact lever after axostylus axostyle inserts the vertical core of support bar with support bar on the groove corresponding position have annular groove;
Turn round the groove on the arm embedding support bar on the described torsion spring, and be stuck in the annular groove of axostylus axostyle.
4. the movable contact mechanism of circuit breaker as claimed in claim 2 is characterized in that:
The middle part of described support bar laterally has the pin-and-hole that connects with the vertical core on support bar top;
The middle part of described support bar laterally has groove;
On the axostylus axostyle of described Y type contact lever after axostylus axostyle inserts the vertical core of support bar with support bar on the pin-and-hole corresponding position have annular groove;
Described Y type contact lever by inserting support bar pin-and-hole and the pin and the support bar of the annular groove of axostylus axostyle be rotationally connected;
Turn round on the described torsion spring in the groove that arm is stuck in support bar.
5. the movable contact mechanism of circuit breaker as claimed in claim 4 is characterized in that:
Have the shaft shoulder on the axostylus axostyle of described Y shape contact lever, insert and put spring leaf between the armpit of this shaft shoulder and the upper surface of support bar.
6. the movable contact mechanism of circuit breaker as claimed in claim 1 is characterized in that:
The bottom of described support bar connects lever by bearing pin, and this lever is used to pull support bar disjunction contact.
7. the movable contact mechanism of circuit breaker as claimed in claim 6 is characterized in that:
The bottom of described support bar is provided with boss, and when lever forwarded certain angle to, this boss contacted with the seamed edge of lever.
8. the movable contact mechanism of circuit breaker as claimed in claim 1 is characterized in that:
The U type arm middle part of described Y type contact lever has axis hole, and axostylus axostyle is rigidly connected by this axis hole and U type arm.
9. the movable contact mechanism of circuit breaker as claimed in claim 8 is characterized in that:
Described axostylus axostyle is riveted, is threaded or welded with U type arm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202658944U CN201773792U (en) | 2010-07-15 | 2010-07-15 | Movable contact mechanism of circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202658944U CN201773792U (en) | 2010-07-15 | 2010-07-15 | Movable contact mechanism of circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201773792U true CN201773792U (en) | 2011-03-23 |
Family
ID=43753636
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202658944U Expired - Lifetime CN201773792U (en) | 2010-07-15 | 2010-07-15 | Movable contact mechanism of circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201773792U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102339693A (en) * | 2010-07-15 | 2012-02-01 | 北京翠祥电器元件有限公司 | Movable contact mechanism of circuit breaker |
-
2010
- 2010-07-15 CN CN2010202658944U patent/CN201773792U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102339693A (en) * | 2010-07-15 | 2012-02-01 | 北京翠祥电器元件有限公司 | Movable contact mechanism of circuit breaker |
| CN102339693B (en) * | 2010-07-15 | 2014-02-12 | 北京翠祥电器元件有限公司 | Movable contact mechanism of circuit breaker |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20110323 Effective date of abandoning: 20140212 |
|
| RGAV | Abandon patent right to avoid regrant |