CN103811235B - Circuit-breaker - Google Patents
Circuit-breaker Download PDFInfo
- Publication number
- CN103811235B CN103811235B CN201310567367.7A CN201310567367A CN103811235B CN 103811235 B CN103811235 B CN 103811235B CN 201310567367 A CN201310567367 A CN 201310567367A CN 103811235 B CN103811235 B CN 103811235B
- Authority
- CN
- China
- Prior art keywords
- guide surface
- pivot link
- pole
- fixed contact
- movable contact
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Breakers (AREA)
Abstract
The present invention obtains a kind of circuit-breaker, and it can reduce the individual difference of performance.In the pivot link (33) rotated centered by the axis of connecting rod rotation axis (32) (32a), be inserted with connection shaft (34).Connection shaft passes through the rotation of pivot link while directed in bullport (41), makes movable contact (20,21) displacement.Be provided with at the inner surface of bullport and close side, pole guide surface (41a) and open side, pole guide surface (41b), this closes side, pole guide surface when pivot link rotates to the direction that movable contact (20,21) contacts with fixed contact therefor (17,18), guide connection shaft, this opens side, pole guide surface when pivot link rotates to the direction that movable contact (20,21) is separated with fixed contact therefor (17,18), guides connection shaft.The axis of connecting rod rotation axis is configured in comprise and closes side, pole guide surface and open on imaginary plane some in the guide surface of side, pole.
Description
Technical field
The present invention relates to a kind of circuit-breaker (such as Inturruptor for sub-line or residual current circuit breaker etc.).
Background technology
Current, the circuit-breaker of known following one pole double break mode, in the circuit-breaker of this one pole double break mode, realizes miniaturized in order to ensure the specified cut-out electric current of height, 1 extremely on there is 2 groups of moving contacts and fixed contact.In existing circuit-breaker, use following mechanism, that is, the connecting rod utilizing connection shaft will rotate corresponding to the action of operating grip and the rotating part being provided with moving contact link, rotation corresponding to connecting rod makes rotating part rotate, thus makes operating grip and moving contact interlock.Connecting rod is provided with the elongated hole that connection shaft is passed through.Connection shaft is provided with and is guided and the roller of movement in elongated hole by the inner surface of the elongated hole of connecting rod.Connecting rod, by making rod mobile while rotate in elongated hole, makes rotating part rotate thus.Moving contact is contacted with fixed contact by the rotation of rotating part or is separated (such as with reference to patent documentation 1).
Patent documentation 1: International Publication No. 2012/081105 publication
In the circuit-breaker shown in patent documentation 1, utilize the inner surface guide reel of the elongated hole of connecting rod and make link rotatable, therefore, between the inner surface and roller of the elongated hole of connecting rod, producing frictional force.The frictional force produced between the inner surface and roller of the elongated hole of connecting rod, the direction to the driving torque weakening connecting rod acts on connecting rod, therefore, such as, the lower degradation of the contact pressed to fixed contact by moving contact can occur.In addition, the frictional force produced between the inner surface and roller of the elongated hole of connecting rod, significantly change along with the contact condition of the state of the inner surface of the elongated hole of connecting rod, the inner surface of elongated hole and roller, therefore, according to the difference of the individuality of circuit-breaker, the open and-shut mode of contact, the fluctuation of on-off action increase.
Summary of the invention
The present invention proposes to solve above-mentioned problem, its object is to obtain a kind of circuit-breaker that can reduce the individual difference of performance.
The circuit-breaker that the present invention relates to has: operating grip, fixed contact therefor, rotating part, it is supported rotationally, movable contact, it corresponds to the rotation of rotating part, contacts or be separated with fixed contact therefor, and handle operation mechanism portion, it makes operating grip and movable contact interlock, and handle operation mechanism portion has: pivot link, is provided with bullport, and this pivot link can rotate centered by the axis of connecting rod rotation axis, and connection shaft, it is arranged on rotating part, and be inserted in bullport, directed in bullport by the rotation of pivot link, rotating part is made to rotate to by the direction of movable contact relative to fixed contact therefor contact or separation thus, be provided with at the inner surface of bullport and close side, pole guide surface and open side, pole guide surface, this closes side, pole guide surface when pivot link rotates to the direction that movable contact contacts with fixed contact therefor, guide connection shaft, this opens side, pole guide surface when pivot link rotates to the direction that movable contact is separated with fixed contact therefor, guide connection shaft, the axis of connecting rod rotation axis is configured in comprise and closes side, pole guide surface and open on imaginary plane some in the guide surface of side, pole.
In addition, in the circuit-breaker that the present invention relates to, the axis of connecting rod rotation axis is configured in as the axis shared on the imaginary plane that comprises and close side, pole guide surface and comprises out on the imaginary plane of side, pole guide surface.
The effect of invention
According to the circuit-breaker that the present invention relates to, can make, closing side, pole guide surface and opening the frictional force that any one in the guide surface of side, pole produces, to act on all the time on the direction of the straight line of the axis by connecting rod rotation axis.Thus, can prevent from working as hindering the moment of torsion of the rotation of pivot link closing side, pole guide surface and open frictional force that any one in the guide surface of side, pole produces, can make the impact brought by frictional force not easily involve to when closing pole action or opening actuation time the rotation of pivot link.Thereby, it is possible to reduce the fluctuation of the performance caused by the difference of frictional force between the individuality of circuit-breaker, the individual difference of the performance of circuit-breaker can be reduced.
In addition, to be configured in as the axis shared according to the axis of connecting rod rotation axis on the imaginary plane comprising and close side, pole guide surface and the structure comprised out on the imaginary plane of side, pole guide surface, to close for circuit-breaker the individuality that pole action and opening actuation all can reduce circuit-breaker
Between fluctuation, the individual difference of the performance of circuit-breaker can be reduced further.
Accompanying drawing explanation
Fig. 1 is the oblique view representing the circuit-breaker that embodiments of the present invention 1 relate to.
Fig. 2 is the important part structure chart representing device in the interrelating mechanism portion of Fig. 1 and the unit of circuitry cuts unit.
Fig. 3 is the part in the handle operation mechanism portion schematically representing Fig. 2 and the structure chart in shut-off mechanism portion.
Fig. 4 is the part in the handle operation mechanism portion representing the Fig. 3 become when closing pole state and the structure chart in shut-off mechanism portion.
Fig. 5 is the part in the handle operation mechanism portion schematically representing comparative example and the structure chart in shut-off mechanism portion.
Fig. 6 is the structure chart of the important part schematically representing the circuit-breaker that embodiments of the present invention 2 relate to.
Fig. 7 represents in the important part of the circuit-breaker related in embodiments of the present invention 1, the schematic diagram in the direction of the power that roller is subject to from pivot link and the direction as the power of the revolving force effect of rotating part.
Fig. 8 be represent the power that the roller of Fig. 7 is subject to from pivot link direction and as the power of the revolving force effect of rotating part direction between angle become the schematic diagram of the state of 90 degree.
Fig. 9 is the part in handle operation mechanism portion and the structure chart opening pole state in shut-off mechanism portion that schematically represent Fig. 2 that embodiments of the present invention 1 relate to.
Figure 10 is the structure chart opening pole state in the shut-off mechanism portion schematically represented in the comparative example for comparing with execution mode 1.
The explanation of label
1 circuit-breaker, 7 operating grips, 17 mains side fixed contact therefors (fixed contact therefor), 18 load-side fixed contact therefors (fixed contact therefor), 20 mains side movable contact (movable contact), 21 load-side movable contact (movable contact), 31 handle operation mechanism portions, 32 connecting rod rotation axis, 32a axis, 33 pivot links, 34 connection shafts (insertion parts), 41 bullports, 41a close side, pole guide surface, 41b opens side, pole guide surface, 43 rotational trajectories.
Embodiment
Execution mode 1
Fig. 1 is the oblique view representing the circuit-breaker that embodiments of the present invention 1 relate to.In the drawings, circuit-breaker 1 forms the circuit breaker circuit of 3 poles being carried out to opening and closing (cut off and connect).Circuit-breaker 1 has: pedestal 2, and it is such as arranged on control panel etc.; Multiple (being 3 in this example) power supply side terminal 3, they are arranged on an end of pedestal 2; Multiple (being 3 in this example) load side terminal 4, they are arranged on the other end of pedestal 2; Multiple (being 3 in this example) circuitry cuts unit 5, they are arranged respectively between each power supply side terminal 3 and each load side terminal 4, carry out opening and closing independently for each pole to the circuit between power supply side terminal 3 and load side terminal 4; Operating grip 7, it is supported in a pair supporting bracket 6 of protruding from the circuitry cuts unit 5 of the central authorities 3 circuitry cuts unit 5 rotationally, for carrying out opening and closing (cut off and connect) by accepting operating physical force to circuit; Trip(ping) bar 8, it is independent of operating grip 7, for carrying out the trip operation disconnecting (cut-out) circuit; Interrelating mechanism portion 9, it corresponds to operating grip 7 and the respective operation of trip(ping) bar 8, makes the action of each circuitry cuts unit 5; Cover portion (not shown), it, for covering each circuitry cuts unit 5, this cover portion is provided with handle fenestra.
Power supply side terminal 3 is connected with the power electric of carrying out electric power supply, load side terminal 4 with accept the load (such as ligthing paraphernalia or motor etc.) that electric power supplies and be electrically connected.Circuitry cuts unit 5 has unit housings 11 and is housed in device 12(Fig. 2 ~ Fig. 4 in the unit described later in unit housings 11).Unit housings 11 embeds and is fixed in pedestal 2.
Operating grip 7 has the handle arms 13 be installed in rotation in a pair supporting bracket 6 and the protuberance 14 externally protruded by the handle fenestra in cover portion from handle arms 13.Handle arms 13 has the bend 13b between a pair relative plate 13a and the edge being arranged on a pair relative plate 13a installed respectively in a pair supporting bracket 6.Protuberance 14 protrudes from bend 13b.Operating grip 7 is operated by following manner, that is, accept operating physical force by protuberance 14 and rotate relative to supporting bracket 6 between on-position and open position.Trip(ping) bar 8 overcurrent (such as short circuit current etc.) flow through circuit situation, manually carry out the situation etc. of cut-out of circuit time operated.
Fig. 2 is the important part structure chart representing device 12 in the interrelating mechanism portion 9 of Fig. 1 and the unit of circuitry cuts unit 5.In unit, device 12 has rotating part 15 and 2 shut-off mechanism portions 16, this rotating part 15 can rotate to be arranged on centered by the rotating part axle (not shown) in unit housings 11, this 2 shut-off mechanism portions 16 correspond to the rotation of rotating part 15, carry out the on-off action (opening actuation and the close pole action) circuit between power supply side terminal 3 and load side terminal 4 being carried out to opening and closing.Thus, each circuitry cuts unit 5 forms and utilizes 2 shut-off mechanism portions 16 to cut off the circuitry cuts unit of the double break mode of circuit for 1 pole.In addition, in fig. 2, what the shut-off mechanism portion 16 under the state being in open position at operating grip 7 of illustrating disconnected (cut-out) circuit opens pole state.
Shut-off mechanism portion 16 has: mains side fixed contact therefor 17, and it is electrically connected with power supply side terminal 3; Load-side fixed contact therefor 18, it is electrically connected with load side terminal 4; Movable conductor portion 19, it is arranged on rotating part 15, corresponding to the rotation of rotating part 15, carries out displacement relative to mains side fixed contact therefor 17 and load-side fixed contact therefor 18; And mains side movable contact 20 and load-side movable contact 21, they are arranged in movable conductor portion 19, corresponding to the displacement of movable conductor portion 19, contact or are separated respectively with mains side fixed contact therefor 17 and load-side fixed contact therefor 18.Circuit between power supply side terminal 3 and load side terminal 4, contact and close with mains side fixed contact therefor 17 and load-side fixed contact therefor 18 by mains side movable contact 20 and load-side movable contact 21 respectively, be separated by mains side movable contact 20 and load-side movable contact 21 with mains side fixed contact therefor 17 and load-side fixed contact therefor 18 and disconnect.Mains side fixed contact therefor 17 and load-side fixed contact therefor 18 are fixed in unit housings 11.
Interrelating mechanism portion 9 has: handle operation mechanism portion 31, and it makes mains side movable contact 20 and load-side movable contact 21 link with operating grip 7 respectively; And trip operation mechanism part 51, it, by the operation of trip(ping) bar 8, makes handle operation mechanism portion 31 to direction (direction that mains side movable contact 20 and load-side movable contact 21 are separated with mains side fixed contact therefor 17 and the load-side fixed contact therefor 18 respectively) action of open circuit.
Trip operation mechanism part 51 has: lever 53, and it can rotate to be supported on centered by the lever shaft 52 in supporting bracket 6; And chain shot 54, it stops the rotation of lever 53 by engaging with lever 53, and links with trip(ping) bar 8.
Lever 53 has the holding section 53a engaged with chain shot 54.By the operation of trip(ping) bar 8, chain shot 54 departs from from holding section 53a, allows lever 53 using lever shaft 52 as center rotating thus.
Handle operation mechanism portion 31 has: pivot link 33, and it can rotate centered by the axis 32a being arranged on the connecting rod rotation axis 32 in unit housings 11; Connection shaft (insertion parts) 34, it corresponds to the rotation of pivot link 33, and rotating part 15 is rotated; 1st connecting rod 35 and the 2nd connecting rod 36, they can connect each other rotationally, are connected with pivot link 33 and lever 53; And extension spring (not shown), it is the pretension body coupling part of the 1st connecting rod 35 and the 2nd connecting rod 36 being carried out to pretension to the bend 13b of operating grip 7.
Connecting rod rotation axis 32 is provided with an end of pivot link 33.In addition, the other end of pivot link 33 is connected via connecting rod shaft 37 rotationally with an end of the 2nd connecting rod 36.
One end of the 1st connecting rod 35 is connected with lever 53 rotationally via connecting rod shaft 38.1st connecting rod 35 and the respective the other end of the 2nd connecting rod 36 can connect mutually rotationally via spring catch (connecting rod shaft) 39 each other.
The bend 13b of operating grip 7 is provided with spring mountings 40.Extension spring is connected between spring mountings 40 and spring catch 39.By extension spring, to approximating direction, pretension is carried out to spring mountings 40 and spring catch 39.
Pivot link 33 is provided with the bullport 41 being inserted with connection shaft 34.In this example, bullport 41 is elongated hole.Pivot link 33 corresponds to the displacement of operating grip 7, makes connection shaft 34 be guided, while rotate centered by the axis 32a of connecting rod rotation axis 32 in bullport 41.Connection shaft 34 is provided with the roller 42 rolled in bullport 41.When pivot link 33 rotates, roller 42 is rolled in bullport 41, while make connection shaft 34 mobile in bullport 41.
Through the connection shaft 34 shared in respective rotating part 15 on each circuitry cuts unit 5.Thus, each rotating part 15 carries out identical action each other by the displacement of connection shaft 34.By the rotation of pivot link 33, connection shaft 34 is directed in bullport 41, and each rotating part 15 rotates to the direction making mains side movable contact 20 and load-side movable contact 21 contact respectively relative to mains side fixed contact therefor 17 and load-side fixed contact therefor 18 or be separated thus.Namely, connection shaft 34 passes through the rotation of pivot link 33 while directed in bullport 41, while make each rotating part 15 rotate, mains side movable contact 20 and load-side movable contact 21 is made to contact respectively relative to mains side fixed contact therefor 17 and load-side fixed contact therefor 18 or be separated.Thus, mains side movable contact 20 and load-side movable contact 21 correspond to the displacement of operating grip 7, contact respectively with mains side fixed contact therefor 17 and load-side fixed contact therefor 18 or are separated.
The state in each shut-off mechanism portion 16, contacted respectively with mains side fixed contact therefor 17 and load-side fixed contact therefor 18 by mains side movable contact 20 and load-side movable contact 21, become pole state of closing (being closed the state of circuit), be separated with mains side fixed contact therefor 17 and load-side fixed contact therefor 18 by mains side movable contact 20 and load-side movable contact 21, become out pole state (being disconnected the state of circuit).
Fig. 3 is the part in the handle operation mechanism portion 31 schematically representing Fig. 2 and the structure chart in shut-off mechanism portion 16.In addition, Fig. 4 is the part in the handle operation mechanism portion 31 representing the Fig. 3 become when closing pole state and the structure chart in shut-off mechanism portion 16.The state of the Fig. 3 be separated with from mains side fixed contact therefor 17 and load-side fixed contact therefor 18 from mains side movable contact 20 and load-side movable contact 21, by making the counter clockwise direction of pivot link 33 to Fig. 3 centered by the axis 32a of connecting rod rotation axis 32 rotate, become the state of the Fig. 4 contacted respectively with mains side fixed contact therefor 17 and load-side fixed contact therefor 18.Now, connection shaft 34 corresponds to the rotation of pivot link 33, directed in bullport 41 to the direction (left direction of Fig. 3) away from connecting rod rotation axis 32.In addition, mains side movable contact 20 and load-side movable contact 21 are from the state of the Fig. 4 contacted respectively with mains side fixed contact therefor 17 and load-side fixed contact therefor 18, by making the clockwise direction of pivot link 33 to Fig. 4 centered by the axis 32a of connecting rod rotation axis 32 rotate, become the state of the Fig. 3 be separated with mains side fixed contact therefor 17 and load-side fixed contact therefor 18.Now, connection shaft 34 corresponds to the rotation of pivot link 33, directed in bullport 41 to the direction (right direction of Fig. 4) close to connecting rod rotation axis 32.
The inner surface of bullport 41 is provided with closing side, pole guide surface 41a and opening side, pole guide surface 41b as plane respect to one another.Close side, pole guide surface 41a when pivot link 33 rotates to mains side movable contact 20 and load-side movable contact 21 with the direction that mains side fixed contact therefor 17 and load-side fixed contact therefor 18 contact respectively (, counter clockwise direction from pivot link 33 to Fig. 3 rotate time), pressing roller 42 on one side, guides connection shaft 34.Open side, pole guide surface 41b when pivot link 33 rotates to the direction that mains side movable contact 20 and load-side movable contact 21 are separated with mains side fixed contact therefor 17 and load-side fixed contact therefor 18 (, clockwise direction from pivot link 33 to Fig. 4 rotate time), pressing roller 42 on one side, guides connection shaft 34.
The axis 32a of connecting rod rotation axis 32 is configured on the imaginary plane A that comprises and close side, pole guide surface 41a.Thus, at roller 42 with close the frictional force (that is, closing the frictional force that side, pole guide surface 41a produces) produced between the guide surface 41a of side, pole, all the time to the direction effect of the straight line of the axis 32a by connecting rod rotation axis 32.Thus, prevent by roller 42 and close torsional interaction that frictional force between the guide surface 41a of side, pole produces on connecting rod rotation axis 32.In addition, in this example, the axis 32a of connecting rod rotation axis 32 is configured with in the position of departing from from the imaginary plane comprising out side, pole guide surface 41b.
Below, be described for action.The operation by operating grip 7 carry out making mains side movable contact 20 and load-side movable contact 21 and mains side fixed contact therefor 17 and load-side fixed contact therefor 18 to contact respectively close pole action time, operating physical force is applied to operating grip 7, operating grip 7 is rotated from open position (position of Fig. 2) to on-position (position on the right side of the operating grip 7 of Fig. 2).
If operating grip 7 rotates from open position to on-position, then while being pulled spring catch 39 by extension spring, the 1st connecting rod 35 rotates to the counter clockwise direction of Fig. 2 centered by connecting rod shaft 38, and the 2nd connecting rod 36 is to the below displacement of Fig. 2.Thus, pivot link 33 rotates to the counter clockwise direction (below) of Fig. 2 and Fig. 3 centered by the axis 32a of connecting rod rotation axis 32, and meanwhile, connection shaft 34 is closed the left direction of side, pole guide surface 41a to Fig. 2 and Fig. 3 and guides.Thus, each rotating part 15 and each movable conductor portion 19 are rotated to the clockwise direction of Fig. 2 and Fig. 3 centered by rotating part axle, and mains side movable contact 20 and load-side movable contact 21 contact respectively with mains side fixed contact therefor 17 and load-side fixed contact therefor 18.Thus, the state in each shut-off mechanism portion 16 becomes and closes pole state.
In addition, in the operation by operating grip 7, when carrying out the opening actuation that mains side movable contact 20 and load-side movable contact 21 are separated with mains side fixed contact therefor 17 and load-side fixed contact therefor 18, operating physical force is applied to operating grip 7, operating grip 7 is rotated to open position from on-position.Thus, the action that 1st connecting rod 35, the 2nd connecting rod 36, pivot link 33, connection shaft 34, rotating part 15 and movable conductor portion 19 are contrary when carrying out rotating from open position to on-position with operating grip 7, mains side movable contact 20 and load-side movable contact 21 are separated with mains side fixed contact therefor 17 and load-side fixed contact therefor 18.Thus, the state in each shut-off mechanism portion 16 becomes out pole state.
On the other hand, under the state that operating grip 7 is in on-position, by the operation of trip(ping) bar 8, when carrying out trip operation (opening actuation) that mains side movable contact 20 and load-side movable contact 21 are separated with mains side fixed contact therefor 17 and load-side fixed contact therefor 18, operating physical force is applied to trip(ping) bar 8, chain shot 54 is departed from from the holding section 53a of lever 53.
If chain shot 54 departs from from the holding section 53a of lever 53, then by the pretightning force of extension spring, lever 53 rotates to the clockwise direction of Fig. 2 centered by lever shaft 52, and meanwhile, the 1st connecting rod 35 rotates to the clockwise direction of Fig. 2 centered by connecting rod shaft 38.Thus, the 2nd connecting rod 36 is to direction (top of Fig. 4) displacement close to bend 13b, and the clockwise direction of pivot link 33 to Fig. 4 centered by the axis 32a of connecting rod rotation axis 32 rotates.Now, connection shaft 34 guides by opening the right direction of side, pole guide surface 41b to Fig. 4.Thus, each rotating part 15 and each movable conductor portion 19 are rotated to the counter clockwise direction of Fig. 4 centered by rotating part axle, and mains side movable contact 20 and load-side movable contact 21 are separated with mains side fixed contact therefor 17 and load-side fixed contact therefor 18.Thus, the state in each shut-off mechanism portion 16 becomes out pole state.
Here, be described for the comparative example for comparing with the circuit-breaker 1 in execution mode 1.Fig. 5 is the part in the handle operation mechanism portion 31 schematically representing comparative example and the structure chart in shut-off mechanism portion 16.In addition, in Figure 5, the state in shut-off mechanism portion 16 is in out pole state.In comparative example, comprise the position of the imaginary plane A closing side, pole guide surface 41a and the imaginary plane B comprising out side, pole guide surface 41b, be all in the position of departing from from the axis 32a of connecting rod rotation axis 32.That is, close side, pole guide surface 41a and open side, pole guide surface 41b and be not all configured on the imaginary plane of the axis 32a comprising connecting rod rotation axis 32.In comparative example, the axis 32a of the connecting rod rotation axis 32 and distance L1 of imaginary plane A, is greater than the axis 32a of the connecting rod rotation axis 32 and distance L2 of imaginary plane B.Other structures and action identical with execution mode 1.
In comparative example, the position comprising the imaginary plane A closing side, pole guide surface 41a is departed from from the axis 32a of connecting rod rotation axis 32, therefore, at connection shaft 34 while by close side, pole guide surface 41a guide displacement on one side close pole action time, roller 42 and the frictional force of closing between the guide surface 41a of side, pole, work as hindering the moment of torsion of the displacement of connection shaft 34.
The axis 32a of the connecting rod rotation axis 32 and distance L1 of imaginary plane A is larger, hinders the moment of torsion of the displacement of connection shaft 34 larger.In addition, roller 42 and close the size of the frictional force between the guide surface 41a of side, pole, according to different by the difference of the speed of the connection shaft 34 that closes when side, pole guide surface 41a guides and roller 42 or acceleration etc.Therefore, in comparative example, if the distance L1 of the axis 32a of connecting rod rotation axis 32 and imaginary plane A is larger, the service speed change of operating grip 7, then between the individuality of circuit-breaker, the difference of the contact condition of mains side movable contact 20 and load-side movable contact 21 and mains side fixed contact therefor 17 and load-side fixed contact therefor 18 also increases.That is, in comparative example, roller 42 and the frictional force of closing between the guide surface 41a of side, pole work as hindering the moment of torsion of the displacement of connection shaft 34, therefore, due to the difference of the size of frictional force, the performance of circuit-breaker produces fluctuation, the individual difference of the performance of circuit-breaker increases.
On the other hand, in the circuit-breaker 1 that execution mode 1 relates to, the axis 32a of connecting rod rotation axis 32 is configured on the imaginary plane A that comprises and close side, pole guide surface 41a, therefore, it is possible to make at roller 42 and close the frictional force (closing the frictional force that side, pole guide surface 41a produces) produced between the guide surface 41a of side, pole and act on all the time in the rectilinear direction by the axis 32a of connecting rod rotation axis 32.Thereby, it is possible to prevent the frictional force produced between the guide surface 41a of side, pole at roller 42 and closing from working as hindering the moment of torsion of the rotation of pivot link 33.Thus, the power transmitted respectively to mains side movable contact 20 and load-side movable contact 21 via roller 42, connection shaft 34, rotating part 15 and movable conductor portion 19 from pivot link 33 can be made, not easily weaken due to frictional force, the impact not easily will caused by the frictional force produced between the guide surface 41a of side, pole at roller 42 and closing, involves the rotation to the pivot link 33 when closing pole action.Therefore, even if in the state owing to closing side, pole guide surface 41a or the difference of contact condition of closing side, pole guide surface 41a and roller 42, and when the size of closing the frictional force produced between side, pole guide surface 41a and roller 42 is different between the individuality of circuit-breaker 1, also can reduce the fluctuation of the contact condition of mains side movable contact 20 and load-side movable contact 21 and mains side fixed contact therefor 17 and load-side fixed contact therefor 18 between the individuality of circuit-breaker 1, the individual difference of the performance of circuit-breaker 1 can be reduced.
In addition, can prevent the frictional force produced between the guide surface 41a of side, pole at roller 42 and closing from working as hindering the moment of torsion of the rotation of pivot link 33, therefore, the power of in the future autorotation connecting rod 33 can be passed to mains side movable contact 20 and load-side movable contact 21 efficiently, the reduction of contact mains side movable contact 20 and load-side movable contact 21 pressed to mains side fixed contact therefor 17 and load-side fixed contact therefor 18 can be suppressed.Thus, without the need to due at roller 42 with close the frictional force produced between the guide surface 41a of side, pole and the slippage of the contact caused compensates, therefore, without the need to strengthening extension spring, or improve the rigidity of support structure of extension spring along with the strengthening of extension spring.Thus, can also the miniaturization of realizing circuit circuit breaker 1, the reduction of cost.
In addition, connection shaft 34 is provided with in bullport 41 roll roller 42, therefore, it is possible to make by close side, pole guide surface 41a guide time connection shaft 34 and by open side, pole guide surface 41b guide time connection shaft 34 more successfully displacement.Thereby, it is possible to reduce further the individual difference of the performance of circuit-breaker 1, and, can the miniaturization of realizing circuit circuit breaker 1 further, the reduction of cost.
In addition, in the above example, comprise the axis 32a imaginary plane A closing side, pole guide surface 41a being configured with connecting rod rotation axis 32, but also can configure the axis 32a of connecting rod rotation axis 32 on the imaginary plane comprising out side, pole guide surface 41b.Like this, then when carrying out opening actuation mains side movable contact 20 and load-side movable contact 21 are separated with mains side fixed contact therefor 17 and load-side fixed contact therefor 18, the impact that the frictional force (opening the frictional force that side, pole guide surface 41b produces) owing to producing between the guide surface 41b of side, pole at roller 42 and opening causes can not be vulnerable to.Thereby, it is possible to the individual difference of performance of circuit-breaker 1 when reducing opening actuation.In addition, such as, can suppress after opening actuation terminates, due at roller 42 with open the frictional force produced between the guide surface 41b of side, pole, make distance S1, S2(Fig. 5 between mains side movable contact 20 and load-side movable contact 21 and mains side fixed contact therefor 17 and load-side fixed contact therefor 18) narrow.
Execution mode 2
Fig. 6 is the structure chart of the important part schematically representing the circuit-breaker that embodiments of the present invention 2 relate to.The axis 32a of connecting rod rotation axis 32 to comprise on the imaginary plane A closing side, pole guide surface 41a and on the imaginary plane B comprising out side, pole guide surface 41b as the axis configuration shared.That is, connecting rod rotation axis 32 axis 32a with due to imaginary plane A and imaginary plane B is intersected with each other and intersection that is that produce is consistent.Other structures and action identical with execution mode 1.
In foregoing circuit circuit breaker 1, the axis 32a of connecting rod rotation axis 32 to comprise on the imaginary plane A closing side, pole guide surface 41a and on the imaginary plane B comprising out side, pole guide surface 41b as the axis configuration shared, therefore, being not only and closing the frictional force produced between side, pole guide surface 41a and roller 42, the frictional force opening generation between side, pole guide surface 41b and roller 42 can also being made to act on all the time on the direction of the straight line of the axis 32a by connecting rod rotation axis 32.Thus, carry out circuit-breaker 1 close pole action time and opening actuation time, frictional force when connection shaft 34 all can be prevented directed in bullport 41 works as hindering the moment of torsion of the rotation of pivot link 33, and the impact caused by frictional force can be made not easily to involve rotation to pivot link 33.Thus, for when closing pole action and opening actuation time performance, the fluctuation between the individuality that all can reduce circuit-breaker 1, can reduce the individual difference of the performance of circuit-breaker 1 further.
In addition, in each above-mentioned execution mode, connection shaft 34 arranges roller 42, while roller 42 rolls in bullport 41, connection shaft 34 is guided in bullport 41, but also can not have roller 42.In this case, when closing pole action connection shaft 34 with close side, pole guide surface 41a and to contact and directed, when opening actuation connection shaft 34 with open side, pole guide surface 41b and to contact and directed.Like this, then frictional force when connection shaft 34 is directed in bullport 41 increases, but frictional force not easily has an impact to the rotation of pivot link 33, therefore, it is possible to the performance inconsistency between the individuality of the circuit-breaker 1 preventing the difference due to frictional force from causing increases.Thereby, it is possible to reduce the individual difference of the performance of circuit-breaker 1.In addition, can number of components be reduced, the reduction of cost can be realized further.
Here, Fig. 7 represents in the important part of the circuit-breaker related in embodiments of the present invention 1, the schematic diagram in the direction of the power that roller 42 is subject to from pivot link 33 and the direction as the power of the revolving force effect of rotating part 15.In addition, Fig. 8 be represent the power that the roller 42 of Fig. 7 is subject to from pivot link 33 direction and as the revolving force effect of rotating part 15 direction between angle become the schematic diagram of the state of 90 degree.
In the figure 7, F
lthe power that roller 42 is subject to from pivot link 33, F
rbe the power of the rotatory force effect as rotating part 15, θ is power F
ldirection and power F
rdirection angulation.In addition, the rotational trajectory of the center of rotation of the roller 42 when rotational trajectory 43 represents that rotating part 15 rotates.Now, at power F
l, power F
rand between angle θ, the relation of following formula (1) is set up.
F
R=F
L·cos（θ）…（1）
According to above-mentioned (1) formula, if angle θ becomes 90 degree, then the power FR as the rotatory force effect of rotating part 15 becomes 0, even if apply rotatory force to pivot link 33, rotating part 15 also can not rotate, can not opening and closing contact.Therefore, when design circuit circuit breaker, need based on the axis 32a of connecting rod rotation axis 32 position, close side, pole guide surface 41a or open the direction of side, pole guide surface 41b, the position of the center of rotation of rotating part 15, the coupling position relation separately of connection shaft 34, determine the slewing area of pivot link 33, be no more than 90 degree to make angle θ in the rotation of pivot link 33.Thus, there is restriction in the configuration relation of pivot link 33 and rotating part 15, freely can not configure parts such as pivot link 33 grade in circuit-breaker.
In embodiments of the present invention 1, the axis 32a of connecting rod rotation axis 32 is configured on imaginary plane A, and therefore, as shown in Figure 8, it is situation parallel with imaginary plane A by the line of the center of rotation of roller 42 in the tangent line of rotational trajectory 43 that angle θ becomes 90 degree.And this equals the extreme rotational angle position of the pivot link 33 that rotating part 15 can be made to rotate by the rotation of pivot link 33.
Therefore, in embodiments of the present invention 1, within the slewing area of pivot link 33 is set in the extreme rotational angle that rotating part 15 can be made to rotate by the rotation of pivot link 33.Thus, in embodiments of the present invention 1, with the coupling position of the position of the position of connecting rod rotation axis 32a, the center of rotation of rotating part 15, connection shaft 34 independently, in the rotation of pivot link 33, angle θ can not more than 90 degree.
Therefore, according to the embodiment of the present invention 1, can not in order to avoid angle θ in the rotation at pivot link 33 be more than 90 degree, and be restricted in the configuration of pivot link 33 or rotating part 15, therefore, connecting rod rotation axis 32 can be configured close to rotating part 15, circuit-breaker can be made miniaturized.In addition, according to the embodiment of the present invention 2, also in the same manner as execution mode 1, connecting rod rotation axis 32 can be configured close to rotating part 15, circuit-breaker can be made miniaturized.
Fig. 9 is the part in handle operation mechanism portion 31 and the structure chart opening pole state in shut-off mechanism portion 16 that schematically represent Fig. 2 that embodiments of the present invention 1 relate to.Figure 10 is the structure chart opening pole state in the shut-off mechanism portion 16 schematically represented in the comparative example for comparing with execution mode 1.In Fig. 9 and Figure 10, FL is power, the F that roller 42 is subject to from pivot link 33
fbe at roller 42 and close the frictional force acted between the guide surface 41a of side, pole.If roller 42 and the coefficient of friction closed between the guide surface 41a of side, pole are set to μ, then at power F
l, power F
fbetween, the relation of following formula (2) is set up.
F
F=μ·F
L…（2）
Use Fig. 9 and Figure 10, the effect that embodiments of the present invention 1 relate to is described.In fig .9, mains side movable contact 20 and load-side movable contact 21 are from the state be separated with mains side fixed contact therefor 17 and load-side fixed contact therefor 18, rotated to the counter clockwise direction of Fig. 9 centered by connecting rod rotation axis 32 by pivot link 33, to closing pole state action.Now, connection shaft 34 and the directed hole 41 of roller 42 guide, while correspond to the rotation of pivot link 33, move to the direction be separated with connecting rod rotation axis 32.
When roller 42 mobile, at roller 42 with close applying frictional force F between the guide surface 41a of side, pole
f.And, frictional force F
fpower as the movement hindering roller 42 works, and as its reaction force, size is identical and direction is contrary masterpiece is used on pivot link 33.In comparative example, as shown in Figure 10, the frictional force F on pivot link 33 is acted on
freaction force, corresponding to the axis 32a of the connecting rod rotation axis 32 and distance L1 of imaginary plane A, produce the torque T of rotation hindering pivot link 33
f.In torque T
fwith frictional force F
fbetween, the relation of following formula (3) is set up.
T
F=－L1·F
F=－L1·μ·F
L…（3）
Torque T
fby the moment of torsion needed for the rotation that increases pivot link 33, increase the operation moment of torsion needed for action in shut-off mechanism portion 16.In addition, coefficientoffrictionμ depends on roller 42 and closes the contact condition of side, pole guide surface 41a and change, therefore, corresponding to the fluctuation of coefficientoffrictionμ, and torque T between circuit breaker individuality
ffluctuation.Because as a result, the operation moment of torsion needed for the action in shut-off mechanism portion 16 also fluctuates, produce the individual difference of mechanism performance.
Especially, the inspection item of operation moment of torsion when normally circuit-breaker dispatches from the factory, relative to the size of the operation moment of torsion of setting when designing, certain constant higher limit, lower limit are set, the judgement that can enforcement dispatch from the factory, therefore, the fluctuation operating moment of torsion becomes the serious problems causing the craspedodrome rate of product to decline.
On the other hand, in Fig. 9 that embodiments of the present invention 1 relate to, the axis 32a of connecting rod rotation axis 32 is configured on the imaginary plane A that comprises and close side, pole guide surface 41a, therefore, at roller 42 with close the frictional force F produced between the guide surface 41a of side, pole
f, act on all the time in the rotation of pivot link 33 on the direction of axis 32a.Therefore, the axis 32a of the connecting rod rotation axis 32 and distance L1 of imaginary plane A is always 0, as the formula (3), hinders the torque T of the rotation of pivot link 33
fall the time 0 is become.
Now, even if the value of coefficientoffrictionμ fluctuates between circuit breaker individuality, torque T
falso be always 0, the operation moment of torsion in shut-off mechanism portion does not produce fluctuation.Therefore, significantly suppress the individual difference of the performance of circuit breaker, can expect that in the inspection of operation moment of torsion when circuit breaker dispatches from the factory, craspedodrome rate improves.In addition, according to the embodiment of the present invention 2, also can realize the effect identical with execution mode 1 significantly suppressing the individual difference of the performance of circuit breaker such.
Claims (3)
1. a circuit-breaker, it has:
Operating grip;
Fixed contact therefor;
Rotating part, it is supported rotationally;
Movable contact, it corresponds to the rotation of described rotating part, contacts with described fixed contact therefor or is separated; And
Handle operation mechanism portion, it makes described operating grip and the interlock of described movable contact,
Described handle operation mechanism portion has:
Pivot link, is provided with bullport, and this pivot link can rotate centered by the axis of connecting rod rotation axis; And
Connection shaft, it is arranged on described rotating part, and is inserted in described bullport, directed in described bullport by the rotation of described pivot link, described rotating part is made to rotate to by the direction of described movable contact relative to described fixed contact therefor contact or separation thus
Be provided with at the inner surface of described bullport and close side, pole guide surface and open side, pole guide surface, this closes side, pole guide surface when described pivot link rotates to the direction that described movable contact contacts with described fixed contact therefor, guide described connection shaft, this opens side, pole guide surface when described pivot link rotates to the direction that described movable contact is separated with described fixed contact therefor, guide described connection shaft
It is characterized in that,
The axis of described connecting rod rotation axis be configured in comprise described in close side, pole guide surface and described in open on imaginary plane some in the guide surface of side, pole.
2. a circuit-breaker, it has:
Operating grip;
Fixed contact therefor;
Rotating part, it is supported rotationally;
Movable contact, it corresponds to the rotation of described rotating part, contacts with described fixed contact therefor or is separated; And
Handle operation mechanism portion, it makes described operating grip and the interlock of described movable contact,
Described handle operation mechanism portion has:
Pivot link, is provided with bullport, and this pivot link can rotate centered by the axis of connecting rod rotation axis; And
Connection shaft, it is arranged on described rotating part, and is inserted in described bullport, directed in described bullport by the rotation of described pivot link, described rotating part is made to rotate to by the direction of described movable contact relative to described fixed contact therefor contact or separation thus
Be provided with at the inner surface of described bullport and close side, pole guide surface and open side, pole guide surface, this closes side, pole guide surface when described pivot link rotates to the direction that described movable contact contacts with described fixed contact therefor, guide described connection shaft, this opens side, pole guide surface when described pivot link rotates to the direction that described movable contact is separated with described fixed contact therefor, guide described connection shaft
It is characterized in that,
The axis of described connecting rod rotation axis as the axis shared be configured in comprise described in close side, pole guide surface imaginary plane on and open on the imaginary plane of side, pole guide surface described in comprising.
3. circuit-breaker according to claim 1 and 2, wherein,
Described connection shaft is provided with the roller rolled in described bullport.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012-250201 | 2012-11-14 | ||
| JP2012250201 | 2012-11-14 | ||
| JP2013-178235 | 2013-08-29 | ||
| JP2013178235A JP5971654B2 (en) | 2012-11-14 | 2013-08-29 | Circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103811235A CN103811235A (en) | 2014-05-21 |
| CN103811235B true CN103811235B (en) | 2016-03-09 |
Family
ID=50707861
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310567367.7A Active CN103811235B (en) | 2012-11-14 | 2013-11-14 | Circuit-breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103811235B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2543810A (en) * | 2015-10-29 | 2017-05-03 | Eaton Ind Mfg Gmbh | Operating mechanism for a toggle switch handle, particularly of a circuit breaker |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4748428A (en) * | 1986-08-04 | 1988-05-31 | Mitsubishi Denki Kabushiki Kaisha | Multi-pole circuit interrupter |
| US5070361A (en) * | 1990-11-30 | 1991-12-03 | General Electric Company | Molded case circuit breaker operating mechanism assembly |
| CN101552162A (en) * | 2008-04-02 | 2009-10-07 | 三菱电机株式会社 | Circuit breaker |
| CN102386029A (en) * | 2010-08-31 | 2012-03-21 | 上海良信电器股份有限公司 | Double-breakpoint movable contact spindle system of moulded case circuit breaker |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100417579B1 (en) * | 2001-04-13 | 2004-02-05 | 엘지산전 주식회사 | Apparatus for make and break the neutral pole of circuit breaker |
| JP4960072B2 (en) * | 2006-12-04 | 2012-06-27 | 三菱電機株式会社 | Circuit breaker |
| CN103201817B (en) * | 2010-12-16 | 2015-09-30 | 三菱电机株式会社 | Circuit-breaker |
-
2013
- 2013-11-14 CN CN201310567367.7A patent/CN103811235B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4748428A (en) * | 1986-08-04 | 1988-05-31 | Mitsubishi Denki Kabushiki Kaisha | Multi-pole circuit interrupter |
| US5070361A (en) * | 1990-11-30 | 1991-12-03 | General Electric Company | Molded case circuit breaker operating mechanism assembly |
| CN101552162A (en) * | 2008-04-02 | 2009-10-07 | 三菱电机株式会社 | Circuit breaker |
| CN102386029A (en) * | 2010-08-31 | 2012-03-21 | 上海良信电器股份有限公司 | Double-breakpoint movable contact spindle system of moulded case circuit breaker |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103811235A (en) | 2014-05-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1975954B1 (en) | Energy dissipating spring seat | |
| EP2028670B1 (en) | Spring charging device of air circuit breaker | |
| JP5324641B2 (en) | Movable contactor assembly of circuit breaker for current limiting type wiring | |
| CN109243932A (en) | A kind of breaker operator system | |
| KR101449884B1 (en) | Circuit breaker | |
| CN103811235B (en) | Circuit-breaker | |
| JP5971654B2 (en) | Circuit breaker | |
| CN1023673C (en) | Auxiliary control and indicating switch for standard multi-circuit breaker | |
| EP2500925B1 (en) | Rotary control unit for a modular electric switchgear apparatus | |
| CN102386028B (en) | Transmission and tripping mechanism of moulded case circuit breaker | |
| JP4376809B2 (en) | Vacuum switchgear | |
| CN103325632B (en) | A kind of can the circuit breaker manipulation mechanism of rapid-releasing | |
| CN208767239U (en) | A kind of breaker operator system | |
| CN101752149B (en) | Circuit breaker | |
| CN103325629B (en) | The resetting-mechanism of dual-interruption point breaker | |
| JP5233114B2 (en) | switchboard | |
| KR101297549B1 (en) | Trip device of short voltage for molded case circuit breaker | |
| KR101689531B1 (en) | Circuit breaker | |
| CN202695344U (en) | Breaker with balanced type control mechanisms | |
| CN1312720C (en) | Interlocking apparatus of a leading under voltage trip mechanism for manual motor starter | |
| CN100355004C (en) | Operating unit for knife switch | |
| CN106169399B (en) | A kind of interlocking mechanism, the control panel and breaker for having the interlocking mechanism | |
| CN104658822A (en) | Circuit breaker with input load increasing means | |
| CN202495702U (en) | Trigger device used for circuit breaker closing and locking device | |
| CN103531407B (en) | With the circuit breaker of balanced-type control mechanism |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |