CN1866444A - Permanent magnet operating mechanism for high power switch - Google Patents
Permanent magnet operating mechanism for high power switch Download PDFInfo
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- CN1866444A CN1866444A CN 200610077974 CN200610077974A CN1866444A CN 1866444 A CN1866444 A CN 1866444A CN 200610077974 CN200610077974 CN 200610077974 CN 200610077974 A CN200610077974 A CN 200610077974A CN 1866444 A CN1866444 A CN 1866444A
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- permanent magnet
- output shaft
- operating mechanism
- supporting bracket
- cam
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Abstract
The invention discloses a permanent-magnetic operational structure of large-power switch, which is characterized by the following: the output shaft is plugged in the end lid, which connects the support board on two sides of output shaft to parallel the output shaft; the end cap connects the back of output shaft; the driving shaft can be plugged on the support board movablely with cam fixing on the driving shaft between end cap and end lid; the hand-operated braking spring is connected between cam and support board; the driving shaft connects the hand-operated crank; the driven gear is loaded on the driving shaft, which engages positive gear on the support board, which is fixed on one end of driving shaft; the driving shaft can be plugged on the support board rotatably, whose the other end connects operational crank.
Description
Technical field
The present invention relates to the operating mechanism of power switch, is a kind of permanent magnet operating mechanism for high power switch specifically.
Background technology
Existing power switch great majority are actions of being finished separating brake, combined floodgate by electromagnetic operating mechanism or spring operating mechanism, and the deficiency of electromagnetic operating mechanism is that mechanical locking device will be set in addition, complex structure, failure rate height, and noise is big, useful life is short; Spring operating mechanism then needs motor drives, and by mechanical latching, complex structure, heaviness are moved dumbly, and noise is big, the failure rate height.In addition, occurred the monostable operating mechanism in recent years, the operating mechanism of this form prolongs substantially than bistable complexity, particularly manual switching-off device has used traditional dropout principle, and many, the complex structure of part is so latch portion is easy to break down.The manual switching-off device of the operating mechanism of above-mentioned several forms, all the regular event with mechanism moves, because of the life-span weak point that acts frequently.My another patent ZL98220417.5 (a kind of permanent-magnet operating mechanism of vacuum switch) discloses a kind of operating mechanism that relies on the electromagnetic force divide-shut brake, relies on the magnetic force locking of permanent magnet, have characteristics simple in structure, that reliability is high, failure rate is low, can realize non-maintaining.The defective that this permanent-magnet operating mechanism exists is, because permanent magnet suction is very big, in case solenoid breaks down, then compares difficulty when needing with manual brake separating, uses the manual brake separating mechanism of common lever principle can't guarantee the stable of opening velocity.Chinese patent CN200510042050.7 " a kind of manual switching-off device of permanent magnet switch operating mechanism " then discloses a kind of manual switching-off device that cooperates permanent-magnet operating mechanism to use, the rotation of the cam that this device utilization is connected with spring is with the output shaft jack-up of permanent-magnet operating mechanism, reach the purpose of manual brake separating, mistake " dead point " principle of utilizing spring simultaneously is with cam lock, this apparatus structure is simple, manual brake separating is swift in motion, and can satisfy the basic fundamental requirement of permanent-magnet operating mechanism manual brake separating.But find that in actual use still there is deficiency in this manual switching-off device: 1) have only on the supporting bracket of a side spring is installed, moving component is subjected to force unbalance, causes heavy wear easily, influences useful life; 2) handle directly connects driving shaft, and the torsion that needs when lever operated is bigger, requires great effort during operation, and manual brake separating is dumb when being used for high power switch.
Summary of the invention
The purpose of this invention is to provide a kind of each parts stress balance, long service life, lever operated labour-saving permanent magnet operating mechanism for high power switch.
For achieving the above object, the present invention adopts following technical scheme:
Permanent magnet operating mechanism for high power switch of the present invention, comprise output shaft, output shaft vertically is inserted in the end cap, be fixedly connected with the supporting bracket parallel on the end cap with output shaft, supporting bracket lays respectively at the both sides of output shaft, the rear end of output shaft is fixedly connected with end cap, power transmission shaft is inserted on the supporting bracket rotationally, cam is fixedly mounted on the power transmission shaft, between end cap and end cap, be connected with the manual brake separating spring between cam and the supporting bracket, power transmission shaft is connected with operating grip, also is installed with driven gear on the power transmission shaft, this driven gear and the driving gear engagement that is installed on the supporting bracket, driving gear is fixedly mounted on an end of driving shaft, and driving shaft is inserted on the supporting bracket rotationally, the other end attended operation handle of driving shaft.
On power transmission shaft, the both sides of output shaft respectively fixedly mount a cam, be fixedly mounted on spring hanging column on the cam and pass the end that open slot on the big supporting bracket is connected the manual brake separating spring, the other end of manual brake separating spring hangs on the spring hanging scroll on the supporting bracket.
Described operating grip is the handwheel that directly is fixedly mounted on the driving shaft.
Cam is discoid, is fixedly connected on the power transmission shaft (8) by the fixing point that is positioned at the center of circle one side.
Cam is an elliptic wheel.
The edge of cam is a nonlinear curve.
Above-mentioned spring hanging scroll is installed in the slotted hole of supporting bracket.
Connect permanent magnet switch operating mechanism on the above-mentioned output shaft, be provided with output shaft in the shell of this permanent magnet switch operating mechanism, it is overhanging that output shaft passes the end cap at shell two ends, its front end is connected with actuator, be fixed with iron core on the output shaft, the arranged outside of iron core has permanent magnet, and permanent magnet is fixedlyed connected with shell, and the two ends of permanent magnet respectively are provided with set of pulses coil.
After adopting technique scheme, owing to adopted symmetrical structure, be positioned at the pulling force balance of the manual brake separating spring on the supporting bracket of output shaft both sides, reduced friction, help increasing the service life; Because adopt reduction gear arrangement, lever operated power reduces greatly, and is easy to operate, sensitive, is more suitable in high power switch.
Description of drawings
Fig. 1 is the structural representation of one embodiment of the invention;
Fig. 2 is the A-A cutaway view of Fig. 1;
Embodiment
As shown in Figure 1 and Figure 2, permanent magnet operating mechanism for high power switch of the present invention comprises permanent magnet switch operating mechanism and the manual switching-off device that is connected with the output shaft 2 of permanent magnet switch operating mechanism.Be provided with output shaft 2 in the shell 1 of this permanent magnet switch operating mechanism, output shaft 2 passes that the end cap 15 at shell 1 two ends is overhanging, and its front end is connected with actuator by connecting pin, and the rear end is fixedly connected with end cap 9.The material of shell 1 and end cap 15 all is the irony of easy magnetic conduction.Output shaft 2 is set with antimagnetic axle sleeve with the contact site of shell 1, the stage casing that output shaft 2 is positioned at shell 1 inside fixedly mounts cored 3, the arranged outside of iron core 3 has permanent magnet 4, and permanent magnet 4 is fixedlyed connected with shell 1, and the two ends of permanent magnet 4 respectively are provided with set of pulses coil 5.
On a side end cap 15 of permanent magnet switch operating mechanism, be installed with manual switching-off device, this manual switching-off device comprises the supporting bracket 6,7 that is fixedly mounted on shell 1 one side end caps 15, supporting bracket 6 and supporting bracket 7 lay respectively at the both sides of output shaft 2, power transmission shaft 8 is inserted on big supporting bracket 6 and the ramuscule fagging 7 rotationally, between a side, end cap 9 and the end cap 15 of output shaft 2.Cam 14 is fixedly mounted on the power transmission shaft 8, and between end cap 9 and end cap, the both sides that are positioned at output shaft 2 respectively have one.Be fixedly connected on spring hanging column 141 on the cam 14 and pass the end that open slot on the supporting bracket 6,7 is connected manual brake separating spring 10, the other end of manual brake separating spring 10 hangs on the spring hanging scroll 25 on the supporting bracket 6,7.Spring hanging scroll 25 is installed in the slotted hole of supporting bracket 6,7, can adjust the inclination angle and the degree of tightness of manual brake separating spring 10 like this by the position of regulating spring hanging scroll 25 in slotted hole.Spring hanging point on spring hanging column on the cam 14 and the big supporting bracket 6 should lay respectively at two ends, power transmission shaft 8 axle center, and in initial position, cross manual brake separating spring 10 " dead point " slightly, and the pulling force of manual brake separating spring 10 is wanted at least to make iron core 3 cross the center of permanent magnet 4 in separating brake.
Also be installed with driven gear 81 on the power transmission shaft 8 of manual switching-off device, this driven gear 81 and driving gear 71 engagements that are installed on the supporting bracket 7, driving gear 71 is fixedly mounted on an end of driving shaft 72, driving shaft 72 is inserted on the supporting bracket 7 rotationally by bearing, the other end attended operation handle 73 of driving shaft 72 or operation handwheel.
The operation principle of bistable state permanent magnet operating mechanism is as follows: add pulse current for two pulsed coils 5, pulse current produces induced field in pulsed coil 5, this induced field part is in order to offset the magnetic field that permanent magnet 4 produces, another part acts on iron core 3, produce suction, iron core 3 is moved, and finally under electromagnetic force and permanent magnet attraction double action, be adsorbed on the side end cap 15.When iron core 3 moves, drive the actuator that is connected on the output shaft 2 and finish the divide-shut brake action.After the current vanishes in the pulsed coil 5, the magnetic field that pulse current produces also disappears thereupon, and under the action of a magnetic field that permanent magnet 4 produces, iron core 3 still is attracted on the end cap 15, and switch keeps original operating state.When needs change operating state, promptly when needing to carry out the action of separating brake or combined floodgate, only need in pulsed coil 5, add rightabout pulse current, output shaft 2 is oppositely moved, iron core 3 is adsorbed on the opposite side end cap 15, realizes the transformation of operating state, and keeps stable.
The effect of manual switching-off device is can manually operating state be switched to gate-dividing state when solenoid 5 breaks down.
The ratio of power arm and resistance arm changed with the anglec of rotation of cam 14 when the cam 14 of manual switching-off device made manual brake separating.When manual brake separating began, the ratio of the arm of force was very big, applied less power and just can overcome permanent magnet suction, made output shaft 2 and iron core 3 to the motion of separating brake direction, and along with the increase of iron core 3 with end cap 15 gaps, permanent magnetism suction reduces thereupon fast.Along with the increasing of cam 14 anglecs of rotation, resistance arm length increases sharply, and output shaft 2 movement velocitys are constantly accelerated, thereby reaches the purpose of quick acting switching-off.
In operate as normal, manual switching-off device is inoperative, manual brake separating spring 10 utilizes cam 14 to cross angle of stability after " dead point " with power transmission shaft 8 lockings, and it can not be rotated arbitrarily, and this moment, the operating mechanism of switch relied on that magnetic force in the solenoid 5 is realized dividing, feed motion.When solenoid or operation circuit break down, when can not realize separating brake, as long as move handle 73, the deceleration device that constitutes by driving gear 71 and driven gear 81 transmits strength, make power transmission shaft 8 under the twisting force that increases, turn over certain angle to the separating brake direction, the spring hanging column 141 that is connected with manual brake separating spring 10 is crossed after " dead point " (extended line of the axial connecting line of spring hanging scroll 25 and power transmission shaft 8), under the acting in conjunction of the pulling force of manual brake separating spring 10 and handle 73 power, cam 14 quick rotation, and promote end cap 9, drive output shaft 2 to separating brake direction fast moving by end cap 9 again.Iron core 3 cross rapidly permanent magnet 4 the center and and then tightly being inhaled on the end cap 15 of manual switching-off device one side under the effect of permanent magnetism power, reach the purpose of quick acting switching-off.Owing to after the manual brake separating handle turns over certain angle, mainly rely on the pulling force of manual brake separating spring 10 to carry out separating brake, thereby avoided of the influence of the unsteadiness of human factor to opening velocity.After solenoid 5 faults are got rid of, next time is during electric switch-on, under the effect of combined floodgate electromagnetic force, iron core 3 drives output shaft 2, end cap 9 moves to the combined floodgate direction, cam 14 overcomes manual brake separating spring 10 under the pressure effect of end cap 9 pulling force is to counter-rotation, and when the spring hanging column on the cam 14 141 was crossed " dead point ", cam 14 turned over an angle of stability under the spring tension effect, arrive point of safes and realize spring energy-storage, for next manual brake separating is got ready.Owing to the effect of angle of stability, manual brake separating spring 10 can not form reaction force to permanent magnetism suction, can guarantee that switch contact pressure does not reduce after closing a floodgate.After cam 14 arrived point of safes, because the effect of angle of stability, manual switching-off device was failure to actuate when normal electronic branch, combined floodgate.Thereby can improve the life cycle of operating mechanism greatly.
It also can be square that the shape of above-mentioned shell 1 can be designed to round barrel shape as required, and the shape of end cap 15 and iron core 3, solenoid 5 also should adapt with it.
The shape of above-mentioned cam 14 has determined the situation of change of output shaft 2 translational speeds, can be designed to circle, ellipse or other nonlinear curves as required during actual the use.
Claims (8)
1, permanent magnet operating mechanism for high power switch, comprise output shaft (2), output shaft (2) vertically is inserted in the end cap (15), be fixedly connected with the supporting bracket (6 parallel on the end cap (15) with output shaft (2), 7), supporting bracket (6,7) lay respectively at the both sides of output shaft (2), the rear end of output shaft (2) is fixedly connected with end cap (9), power transmission shaft (8) is inserted into supporting bracket (6 rotationally, 7) on, cam (14) is fixedly mounted on the power transmission shaft (8), be positioned between end cap (9) and the end cap (15), be connected with manual brake separating spring (10) between cam (14) and the supporting bracket (6), power transmission shaft (8) is connected with operating grip, it is characterized in that: also be installed with driven gear (81) on the power transmission shaft (8), this driven gear (81) and driving gear (71) engagement that is installed on the supporting bracket (7), driving gear (71) is fixedly mounted on the driving shaft (72), and driving shaft (72) is inserted into supporting bracket (6 rotationally, 7) on, also be connected with operating grip (73) on the driving shaft (72).
2, permanent magnet operating mechanism for high power switch according to claim 1, it is characterized in that: both sides last at power transmission shaft (8), output shaft (2) respectively fixedly mount a cam (14), be fixedly mounted on spring hanging column (141) on the cam (14) and pass the end that open slot on the supporting bracket (6,7) is connected manual brake separating spring (10), the other end of manual brake separating spring (10) hangs on the spring hanging scroll (25) on the supporting bracket (6,7).
3, permanent magnet operating mechanism for high power switch according to claim 1 and 2 is characterized in that: described operating grip (73) is the handwheel that is fixedly mounted on the driving shaft (72).
4, permanent magnet operating mechanism for high power switch according to claim 1 and 2 is characterized in that: cam (14) is fixedly connected on the power transmission shaft (8) by the fixing point that is positioned at the center of circle one side for discoid.
5, permanent magnet operating mechanism for high power switch according to claim 1 and 2 is characterized in that: cam (14) is an elliptic wheel.
6, permanent magnet operating mechanism for high power switch according to claim 1 and 2 is characterized in that: the edge of cam (14) is a nonlinear curve.
7, permanent magnet operating mechanism for high power switch according to claim 2 is characterized in that: spring hanging scroll (25) is installed in the slotted hole of supporting bracket (6,7).
8, permanent magnet operating mechanism for high power switch according to claim 1 and 2, it is characterized in that: output shaft (2) is gone up and is connected permanent magnet switch operating mechanism, be provided with output shaft (2) in the shell of this permanent magnet switch operating mechanism (1), it is overhanging that output shaft (2) passes the end cap (15) at shell (1) two ends, its front end is connected with actuator, be fixed with iron core (3) on the output shaft (2), the arranged outside of iron core (3) has permanent magnet (4), permanent magnet (4) is fixedlyed connected with shell (1), and the two ends of permanent magnet (4) respectively are provided with set of pulses coil (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610077974 CN1866444A (en) | 2006-04-26 | 2006-04-26 | Permanent magnet operating mechanism for high power switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610077974 CN1866444A (en) | 2006-04-26 | 2006-04-26 | Permanent magnet operating mechanism for high power switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1866444A true CN1866444A (en) | 2006-11-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610077974 Pending CN1866444A (en) | 2006-04-26 | 2006-04-26 | Permanent magnet operating mechanism for high power switch |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102005703A (en) * | 2010-11-05 | 2011-04-06 | 童建朋 | Handcart type high and middle-pressure switch |
| CN102426974A (en) * | 2011-11-18 | 2012-04-25 | 埃尔凯电器（珠海）有限公司 | Dual-brake-separating speed permanent magnetic operating mechanism and vacuum circuit breaker |
-
2006
- 2006-04-26 CN CN 200610077974 patent/CN1866444A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102005703A (en) * | 2010-11-05 | 2011-04-06 | 童建朋 | Handcart type high and middle-pressure switch |
| CN102005703B (en) * | 2010-11-05 | 2013-01-16 | 童建朋 | Handcart type high and middle-pressure switch |
| CN102426974A (en) * | 2011-11-18 | 2012-04-25 | 埃尔凯电器（珠海）有限公司 | Dual-brake-separating speed permanent magnetic operating mechanism and vacuum circuit breaker |
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