CN105551840A - Contact rotation shaft system and low-voltage switch - Google Patents
Contact rotation shaft system and low-voltage switch Download PDFInfo
- Publication number
- CN105551840A CN105551840A CN201610075906.9A CN201610075906A CN105551840A CN 105551840 A CN105551840 A CN 105551840A CN 201610075906 A CN201610075906 A CN 201610075906A CN 105551840 A CN105551840 A CN 105551840A
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- Prior art keywords
- rotating shaft
- moving contact
- contact
- spring
- axle
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
- H01H73/02—Details
- H01H73/04—Contacts
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/50—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position
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- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
- Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
- Springs (AREA)
Abstract
The application relates to a contact rotation shaft system and a low-voltage switch. The contact rotation shaft system disclosed by the invention comprises a movable contact, a rotation shaft, a spring and a spring penetrating shaft, wherein the movable contact can rotate in a hollow cavity of the rotation shaft, and the movable contact and the rotation shaft are locked tightly by the spring, the spring penetrating shaft and a bearing shaft on the movable contact to form the contact rotation shaft system. The contact rotation shaft system is provided with a first stable position when the movable contact and the rotation shaft are in contact and a second stable position when the movable contact and the rotation shaft are separated. With the contact rotation shaft system provided by the invention, the movable contact has a function of falling prevention during the repulsion process, the vibration frequency and time of the movable contact are reduced, the burning loss caused by frequent contact, repulsion and contact again of a movable contact point and a static contact point during the breaking process of the contact rotation shaft system is improved, and the short-circuit breaking time is shortened. The invention also discloses the low-voltage switch with the above contact rotation shaft system.
Description
Technical field
The present invention relates to low-voltage electrical apparatus, relate more specifically to a kind of contact rotating shaft system and low tension switch.
Background technology
Contact rotating shaft system is the main parts size in low tension switch, comprises moving contact and rotating shaft two parts, and rotating shaft is supports contacts and makes the parts that contact can rotate.Contact rotating shaft system carries the vital task of current turns ON and disconnection.In low tension switch testing experiment, short circuit breaking capacity is a very important index.The short circuit breaking process of low tension switch is: when Short-Circuit High Current is passed through, mechanical unlocking, and rotating shaft drives moving contact to separate with fixed contact, thus open circuit.Break-time comprises operate time of overcurrent trip and release and touches the time that draw bar makes snap close trip.
But when Short-Circuit High Current is passed through, mechanism is before dropout, and moving contact has the trend and action of scolding out under acting on while two repulsion and the Hall nurse power between loop Lorentz force and contact.After moving contact is scolded out, repulsion reduces, and moving contact resets under the effect of end pressure spring, is then again scolded out under the effect of repulsion again.Before mechanical unlocking, that so repeats scolds out and resets, and can cause the reciprocal vibration of moving contact, cause the arc reignition between moving contact and fixed contact, cause the scaling loss even adhesion of moving contact and fixed contact, the more serious circuit breaker that may make burns.
Therefore, when Short-Circuit High Current by time, shortening break-time, reduce the frequency of reciprocal vibration of moving contact, is those skilled in the art's technical problems urgently to be resolved hurrily.
Summary of the invention
In view of above-mentioned technological deficiency, the object of the present invention is to provide a kind of contact rotating shaft system, moving contact can being reduced scolding the frequency of back and forth vibration in open procedure, reducing the scaling loss of moving contact and fixed contact.Another object of the present invention is to provide a kind of low tension switch with above-mentioned contact rotating shaft system.
To achieve these goals, this invention takes following technical scheme:
A kind of contact rotating shaft system, comprise moving contact, its part away from moving contact is provided with rotating shaft and load axle; Rotating shaft, is formed with cavity, and described rotating shaft is formed with the first location notch towards the two opposite side walls of described cavity; And axle worn by spring and spring; Wherein, described moving contact is through the cavity of described rotating shaft, the two ends of described rotating shaft are installed in the first location notch described in two respectively, described moving contact can rotate in the cavity of described rotating shaft centered by described rotating shaft, utilize described spring, axle worn by described spring and described moving contact is arranged in described rotating shaft by described load axle, described contact rotating shaft system is configured to, when described spring put on torque that the active force on described load axle formed described rotating shaft, described moving contact and described rotating shaft are fitted time, described moving contact is positioned at the first settling position; When described spring puts on torque that the active force on described load axle formed described rotating shaft, makes described moving contact to be separated with described rotating shaft and can be stabilized in separation point position, now, described moving contact is positioned at the second settling position.
Utilize contact rotating shaft system of the present invention, when Short-Circuit High Current is passed through, spring puts on torque that the active force on load axle formed rotating shaft, moving contact is separated with rotating shaft and can be stabilized in the second settling position, moving contact is made to have dropproof function scolding open procedure, reduce frequency and the number of times of moving contact vibration, improve contact rotating shaft system in breaking course, moving contact frequently contacts with fixed contact, scolds out, contacts the scaling loss caused again, shortens the short circuit breaking time.
Preferably, described moving contact is formed with away from the part of moving contact groove of stepping down, the described rotating shaft part corresponding with described groove of stepping down is formed with curved face part, described curved face part comprises the first recess, second recess and the first protuberance between described first recess and described second recess, described spring is extension spring, the first end of axle through described extension spring worn by the described spring of groove of stepping down described in being positioned at, and apply active force in described curved face part, described load axle is through the second end of described extension spring, and apply active force in described moving contact, wherein, when described spring wear axle be positioned at described first protuberance time, described extension spring reaches maximal tensility, described moving contact is positioned at scolds out critical localisation, when described extension spring put on torque that the active force on described load axle formed described rotating shaft, described moving contact and described rotating shaft are fitted time and be positioned at described first recess when axle worn by described spring, described moving contact is positioned at described first settling position, when described spring puts on torque that the active force on described load axle formed described rotating shaft, makes described moving contact to be separated with described rotating shaft and can be stabilized in separation point position and described spring is worn axle and is positioned at described second recess, described moving contact is positioned at described second settling position.
Preferably, described groove of stepping down has the High lateral wall and low sidewall that are oppositely arranged, described High lateral wall and described low sidewall have difference in height, described High lateral wall can against and the described spring of stepping down in groove described in promoting wear axle and move to described second recess by described first recess; The seamed edge on the top of described low sidewall can against and promote described spring and wear axle and move to described first recess by described second recess.
Preferably, described load axle is polygon shaft; Described rotating shaft is also formed with the second location notch towards the two opposite side walls of described cavity; Described spring is torsion spring, described spring is worn axle and is passed the hollow structure of described torsion spring and be positioned in the second location notch described in two, first torque arm of described torsion spring and described rotating shaft against, second torque arm of described torsion spring and described load axle against, wherein, when described second torque arm passes the center of described rotating shaft to the active force of described load axle, described moving contact is in scolds out critical localisation; When the torque that the active force of described second torque arm to described load axle is formed described rotating shaft, described moving contact and described rotating shaft are fitted time, described moving contact is positioned at described first settling position; When the torque that the active force of described second torque arm to described load axle is formed described rotating shaft, make described moving contact be separated with described rotating shaft and be stabilized in separation point position time, described moving contact is positioned at described second settling position.
Preferably, described torsion spring is block form torsion spring.
Preferably, described rotating shaft is also provided with guiding shoulder, described moving contact can move along the spigot surface of described guiding shoulder.
Preferably, described contact rotating shaft system also comprises position limiting structure, and described position limiting structure is for limiting described moving contact by the extreme position of scolding out.
Preferably, described spring is worn axle and is provided with two prerotation vanes, and the both sides being distributed in described moving contact of two described prerotation vane symmetries think that the motion of described moving contact provides guiding.
Preferably, described moving contact is provided with arc insulating cover.
Present invention also offers a kind of low tension switch, comprise contact rotating shaft system, wherein, described contact rotating shaft system is the contact rotating shaft system described in above-mentioned any one.
Low tension switch provided by the invention comprises contact rotating shaft system, and this contact rotating shaft system has above-mentioned technique effect, and the low tension switch comprising this contact rotating shaft system also should have identical technique effect.
Accompanying drawing explanation
The following accompanying drawing of the application in this as a application's part for understanding the application.Execution mode shown in accompanying drawing and description thereof are used for explaining principle of the present invention.In the accompanying drawings:
Fig. 1 illustrates according to the contact rotating shaft system of the first embodiment of the present invention cutaway view when the first settling position.
Fig. 2 is the vertical view of the contact rotating shaft system illustrated according to the first embodiment of the present invention.
Fig. 3 be illustrate according to the moving contact of the first embodiment of the present invention front view.
Fig. 4 be illustrate according to the rotating shaft of the first embodiment of the present invention cutaway view.
Fig. 5 is the schematic diagram of an embodiment of the curved face part of the rotating shaft illustrated according to the first embodiment of the present invention.
Fig. 6 is the schematic diagram of scolding out critical localisation of the contact rotating shaft system illustrated according to the first embodiment of the present invention.
Fig. 7 illustrates scolding out the schematic diagram of extreme position according to the contact rotating shaft system of the first embodiment of the present invention.
Fig. 8 illustrates according to the contact rotating shaft system of the first embodiment of the present invention respectively at the first settling position, the second settling position and the schematic diagram of scolding out extreme position.
Fig. 9 is the cutaway view of contact rotating shaft system when the first settling position illustrated according to a second embodiment of the present invention.
Figure 10 is the right view of the contact rotating shaft system illustrated according to a second embodiment of the present invention.
Figure 11 is the vertical view of the contact rotating shaft system illustrated according to a second embodiment of the present invention.
Figure 12 is the front view of an embodiment of the torsion spring of the contact rotating shaft system illustrated according to a second embodiment of the present invention.
Figure 13 is the vertical view of an embodiment of the torsion spring of the contact rotating shaft system illustrated according to a second embodiment of the present invention.
Figure 14 is the front view of the moving contact illustrated according to a second embodiment of the present invention.
Figure 15 is the cutaway view of the rotating shaft illustrated according to a second embodiment of the present invention.
Figure 16 be illustrate contact rotating shaft system according to a second embodiment of the present invention respectively at the first settling position and scold out critical localisation time schematic diagram.
Figure 17 illustrates contact rotating shaft system according to a second embodiment of the present invention respectively at the schematic diagram of the first settling position and the second settling position.
Embodiment
Hereinafter, embodiment of the invention will be described with reference to drawings.The detailed description and the accompanying drawings are below used for exemplarily principle of the present invention being described, the invention is not restricted to described preferred embodiment, scope of the present invention is defined by the claims.
Fig. 1 illustrates according to the contact rotating shaft system of the first embodiment of the present invention cutaway view when the first settling position.As shown in Figure 1, contact rotating shaft system 1 comprises moving contact 20a and rotating shaft 30a.Moving contact 20a is provided with rotating shaft 12a away from the part of moving contact.Rotating shaft 30a is formed with cavity 308a, rotating shaft 30a is formed with the first location notch 302a towards the two opposite side walls of cavity 308a, the rotating shaft 12a of moving contact 20a installs (such as, hinged) in the first location notch 302a, moving contact 20a can in cavity 308a with rotating shaft 12a for pivot rotates relative to rotating shaft 30a.
Moving contact 20a utilizes spring with rotating shaft 30a, spring is worn axle and is connected with load axle and makes aforementioned elements be installed as contact rotating shaft system by the active force of spring.This contact rotating shaft system can be configured to, when the torque that the active force that spring puts on load axle is formed rotating shaft 12a, moving contact 20a and rotating shaft 30a is fitted time, moving contact is positioned at the first settling position; When the torque that the active force that spring puts on load axle is formed rotating shaft 12a, moving contact 20a is separated with rotating shaft 30a and separation point position can be stabilized in time, moving contact is positioned at the second settling position.
Utilize the solution of the present invention, scold in open procedure at moving contact, moving contact 20a can be stabilized in the second settling position, to reduce the frequency and number of times that moving contact frequently trembles, improve in breaking course, frequently contact between moving contact with fixed contact, scold out, contact the scaling loss caused again.Meanwhile, when moving contact is in the second settling position, the electric arc produced between moving contact and fixed contact is easily subject to the magnetic effect of arc extinguishing grid pieces and enters arc control device, can accelerate the cutting to electric arc, shortens the short circuit breaking time.
Above-mentioned contact rotating shaft system, discloses two kinds of embodiments, is described in detail below in conjunction with accompanying drawing to each embodiment in the present invention.
Fig. 2 illustrates the contact rotating shaft system vertical view according to the first embodiment of the present invention.
As shown in Fig. 1 ~ 2, contact rotating shaft system 1 mainly comprises moving contact 20a, rotating shaft 30a, and axle 16a and two extension spring 18a worn by spring.Moving contact 20a is welded with moving contact 208a, the side away from moving contact 208a is provided with rotating shaft 12a, load axle 14a.
Two extension spring 18a are arranged on moving contact 20a both sides with the intermediate symmetry plane symmetry of moving contact 20a.The groove 210 of stepping down that axle 16a is positioned at moving contact 20a worn by spring.One end of extension spring 18a is mounted on spring and wears on axle 16a, and the other end is mounted on load axle 14a, and the two ends that axle 16a worn by spring be articulated in rotating shaft 30a simultaneously curved face part on and can move along curved face part.Under the pulling force effect of extension spring 18a, moving contact 20a and rotating shaft 30a can be mounted to the first settling position as shown in Figure 1.
Fig. 3 is the front view of the moving contact illustrated according to the first embodiment of the present invention.As shown in Figure 3, strip moving contact 20a is provided with rotating hole 202a, force-bearing hole 204a in the part away from moving contact 208a.According to the present embodiment, rotating shaft 12a passes force-bearing hole 204a through rotating hole 202a, load axle 14a.
Moving contact 20a is formed with away from the part of moving contact 208a groove 210 of stepping down, and scolds in open procedure at moving contact 20a, and groove 210 of stepping down is worn axle 16a for spring and stepped down from scolding out critical localisation to move to the second settling position.Preferably, groove 210 of stepping down has two High lateral wall be oppositely arranged 214 and low sidewall 215, and High lateral wall 214 and low sidewall 215 have difference in height.When moving contact 20a scolds out, promote spring by the wall of High lateral wall 214 and wear axle 16a; When moving contact resets, promote spring by the seamed edge 216 on the top of low sidewall 215 and wear axle 16a.The distance that seamed edge 216 pairs of springs wear the position of the thrust of axle 16a and rotating hole 202a is comparatively large, and namely form the arm of force of moment to rotating hole 202a place comparatively large, therefore required during moving contact 20a reset reset force is relatively little.Certainly, the structure of groove 210 of stepping down also has other embodiments, and those skilled in the art can according to expecting the function and effect selection setting that will reach.
Fig. 4 is the cutaway view of the rotating shaft illustrated according to the first embodiment of the present invention.As shown in Figure 4, rotating shaft 30a has cavity 308a.Moving contact 20a can through the cavity 308a of rotating shaft 30a.Rotating shaft 30a has the first location notch 302a (another is not shown) towards two opposed inner walls of cavity 308a, and the rotating shaft 12a of moving contact 20a is installed in the first symmetrical location notch 302a of (such as, being hinged to) two.During installation, the two ends of rotating shaft 12a are slipped into arc end from the openend of the first location notch 302a simultaneously, and fit with arc end, realize the installation of moving contact 20a and rotating shaft 30a.After installation, moving contact 20a can rotate relative to rotating shaft 30a centered by rotating shaft 12a.
As shown in Figure 4, the part that rotating shaft 30a is corresponding with groove 210 of stepping down is formed with continuous print curved face part, when spring wear axle 16a be arranged in groove 210 of stepping down time, can move along curved face part in its two ends simultaneously.Curved face part can comprise the first recess 310, second recess 311 and the first protuberance 312 between the first recess 310 and the second recess 311.When spring wear axle 16a be positioned at the first protuberance 312 time, extension spring 18a reaches maximal tensility, and moving contact is positioned at scolds out critical localisation; When the torque that the active force that extension spring 18a puts on load axle 14a is formed rotating shaft 12a, moving contact 20a and rotating shaft 30a is fitted time and when spring is worn axle 16a and is positioned at the first recess 310, moving contact is positioned at the first settling position; The torque that the active force put on load axle 14a as spring 18a is formed rotating shaft 12a, moving contact 20a is separated with rotating shaft 30a and is stabilized in separation point position and is positioned at the second recess 311 when axle 16a worn by spring, moving contact is positioned at the second settling position.
Particularly, as shown in Figure 5, Fig. 5 is the schematic diagram of an embodiment of the curved face part of the rotating shaft illustrated according to the first embodiment of the present invention.Curved face part comprises segmental arc 901,902,903,904,906 and straightway 905.Preferably, the curved surface diameter of segmental arc 901,906 is identical with the diameter that axle 16a worn by spring, and the first recess 310 is formed at the arc surface part of segmental arc 901, and the second recess 311 is made up of the arc surface part of segmental arc 906 and straightway 905.First recess 310 corresponds to first settling position of moving contact 20a; Second recess 311 corresponds to second settling position of moving contact 20a, and the particular location of the second settling position in the second recess 311 is determined by the rigidity of extension spring 18a.In addition, the first protuberance 312 is such as the curvature portion be formed by connecting by segmental arc 902,903,904.
More preferably, segmental arc 902 and 901 is tangent, the two ends of segmental arc 903 respectively with arc tips 902,904 tangent, segmental arc 904 is also tangent with straightway 905.In addition, the diameter of segmental arc 903 is preferably less than segmental arc 902.The segmental arc 903 of small diameter can play acceleration, and moving contact 30a can be made to scold the open procedure starting stage, and the elongation of extension spring 18a reaches maximum as early as possible, and contact rotating shaft system can arrive as early as possible scolds out critical localisation.Similarly, segmental arc 904 can accelerate arriving the open procedure of scolding after scolding out critical localisation.
The segmental arc and the correlation that it will be appreciated by those skilled in the art that above-described first recess, the second recess and the first protuberance are only exemplary.In addition, any can realize the object of the invention any shape and structure can be applied to the first recess, the second recess and the first protuberance.
Shown in composition graphs 5, L0, L1 and L2 represent respectively moving contact 20a at the first settling position, scold out critical localisation and the second settling position lower spring to wear axle 16a and load axle 14a distance of shaft centers, it corresponds to the length of extension spring 18a.Scolding out critical localisation, the maximal tensility of the corresponding extension spring 18a of L1.L0 and L2 is all less than L1, that is, extension spring length when the first settling position and the second settling position is all less than the length of extension spring when scolding out critical localisation.Preferably, the magnitude relationship of L0, L1 and L2 can be expressed as: L0 < L2 < L1, (L1-L0) > (L1-L2).The energy storage that moving contact 30a arrives extension spring 18a when scolding out critical localisation is maximum, and the speed that moving contact continues to open can be faster.Scold out after stablizing, the reset force of the moving contact directly related with extension spring power can be less, resets easier.
Fig. 6 illustrates to be positioned at the schematic diagram of scolding out critical localisation according to the moving contact of the first embodiment of the present invention.Now, spring is worn axle 16a and is positioned at the first protuberance 312.
Fig. 7 illustrates to be positioned at the schematic diagram of scolding out extreme position according to the moving contact of the first embodiment of the present invention.Extreme position is scolded out to be the maximum position that moving contact can be scolded out under the effect of electrodynamic repulsion force, according to the difference of rigidity of the extension spring 18a arranged, the stroke that moving contact moves to the second settling position by the first settling position is less than or equal to moving contact and is moved to the stroke of scolding out extreme position by the first settling position.
Fig. 8 illustrates schematic diagram when laying respectively at the first settling position, the second settling position according to the moving contact of the first embodiment of the present invention and scold out extreme position.As shown in Figure 8, when moving contact 20a is subject to along extension spring 18a axle center at load axle 14a place and point to the tensile force f that axle 16a worn by spring
11, F
11the moment that rotating shaft 12a produces is made moving contact 20a to be fitted on rotating shaft 30a and is positioned at the first settling position; When moving contact 20a is subject to the component F of the tension spring tension pointing to seamed edge 216
12, F
12the moment that rotating shaft 12a produces is made moving contact 20a to be separated with rotating shaft 30a and is stabilized in the second settling position; Extreme position is scolded out to be that moving contact is by the maximum position of scolding out.
Contact rotating shaft system provided by the invention, can ensure to scold out with in reseting procedure at moving contact 20a, and spring is worn axle 16a and can be synchronized with the movement and not deflection along the curved face part on rotating shaft 30a all the time.Particularly, as shown in Figure 2, spring is worn axle 16a and is provided with the both sides being arranged on moving contact 20a of two prerotation vanes, 602, two prerotation vane 602 symmetries and provides guiding for the motion of moving contact 20a.Arranging of two prerotation vanes 602 can be fit with moving contact 20a, also can be form less fit clearance with moving contact 20a.Moving contact 20a is scolding out or in reseting procedure, can move to ensure its centering along prerotation vane 602.Prerotation vane 602 can be that independent parts are set with and are fixed on spring and wear on axle 16a, also can be formed directly in and wears on axle 16a at spring.
Further, contact rotating shaft system also comprises the position limiting structure for limiting the extreme position that moving contact 20a scolds out.Particularly, as shown in figs. 34, moving contact 20a is formed near the position of force-bearing hole 204a and scolds out spacing preiection 212, the position that rotating shaft 30a is corresponding with scolding out spacing preiection 212 is formed with the arc surface 316 of indent, after moving contact 20a scolds out, scold out spacing preiection 212 spacing against realizing with the arc surface 316 of indent.
In addition, it is spacing that the seamed edge 216 of the groove 210 of stepping down of moving contact also can wear axle 16a to spring, to control opening angle when moving contact 20a scolds out and damp impacts power.
Certainly, position limiting structure can also be arranged, as long as can meet spacing requirement contact site other of moving contact 20a and rotating shaft 30a are any.In addition, the confined planes of position limiting structure can also be the curved surface etc. of plane or other shapes.
Contact rotating shaft system below in conjunction with the first embodiment provided by the invention illustrates the course of action that moving contact is scolded out and resetted.
When Short-Circuit High Current by time, moving contact 20a scolds out by the moment of torsion that two repulsion (the Hall nurse power namely between loop Lorentz force and contact) overcome extension spring 18a to be provided.Now the wall of the High lateral wall 214 of the groove 210 of stepping down of moving contact 20a promotes spring and wears axle 16a and move in the curved face part of rotating shaft 30a, and moves to the first protuberance 312 from the first recess 310.When spring is worn after axle 16a crosses the first protuberance 312, axle 16a worn by spring will along curved face part free fall, and the extreme position of free fall is in the segmental arc 906 of the second recess 311.Wear the extreme position of axle 16a accordingly with spring, moving contact is positioned at scolds out extreme position.And moving contact 20a is stabilized in the second settling position the most at last.The corresponding spring of second settling position wears axle 16a on segmental arc 906 or straightway 905, and particular location then depends on the rigidity of extension spring 18a.
After moving contact 20a is positioned at the second settling position, mechanism threads off under the effect of overcurrent release, rotating shaft 30a by under the driving of lower link to the sideway swivel near large lid.Because rotating shaft 30a and moving contact 20a locks by extension spring 18a, rotating shaft 30a drives moving contact 20a to rotate thereupon.Simultaneously, cover greatly the limiting section being provided with and coordinating with moving contact top 206a, the rotation of moving contact 30a is equal in the downward actuating force of 206a place, moving contact top applying, seamed edge 216 promotes spring and wears axle 16a and move in the curved face part of rotating shaft 30a, until cross the first protuberance 312 of curved face part, and automatic fall-back is in the first recess 310, moving contact 20a is reset to the first settling position.
Be below the contact rotating shaft system of the second embodiment provided by the invention, describe in detail below in conjunction with Fig. 9-17.
Fig. 9 is the cutaway view of contact rotating shaft system when the first settling position illustrated according to a second embodiment of the present invention.
Figure 10 is the rearview of the contact rotating shaft system illustrated according to a second embodiment of the present invention.
Figure 11 is the vertical view of the contact rotating shaft system illustrated according to a second embodiment of the present invention.
As shown in figs. 9-11, contact rotating shaft system 1 comprises moving contact 20b, rotating shaft 30b, axle 16b worn by spring and torsion spring 18b.Moving contact 20b is welded with moving contact 208b, moving contact 20b is provided with rotating shaft 12b and load axle 14b away from one end of moving contact 208b.
Figure 12 is the front view of the torsion spring of the contact rotating shaft system illustrated according to a second embodiment of the present invention.
Figure 13 is the vertical view of the torsion spring of the contact rotating shaft system illustrated according to a second embodiment of the present invention.
As shown in Figure 12 ~ 13, torsion spring 18b is preferably block form torsion spring, and torsion spring 18b is arranged on the both sides of moving contact 20b with the intermediate symmetry plane symmetry of moving contact.Block form torsion spring comprises symmetrical Part I and Part II, and Part I and Part II lay respectively at the both sides of moving contact 20b.Illustrate for the Part I of torsion spring 18b, Part I comprises the hollow structure 803 curled up by spring silk and the first torque arm and the second torque arm that are connected to hollow structure 803, first torque arm comprises straightway 806 and bending section 808, second torque arm comprises straightway 802 and linkage section 804.The Part I of torsion spring 18b is connected by linkage section 804 with Part II.Shaping the while of Part I and Part II in block form torsion spring production process, error is little, and in the course of work, synchronism is good, significantly can reduce moving contact and scold out and the deflection in reseting procedure.In the present embodiment, preferably the end of straightway 802 arrange the second bending section 805, second bending section 805 moving contact can be avoided to be positioned at the first settling position time, moving contact 20b and torsion spring 18b interferes, for moving contact 20b steps down.
Certainly, the structure of torsion spring 18b is not limited only to shown in Figure 12 ~ 13, and torsion spring 18b can also be other structure.Such as, two parts of torsion spring 18b can not be symmetrical.Or torsion spring 18b only includes Part I etc.It will be appreciated by those skilled in the art that the concrete structure of torsion spring 18b is can meet premised on instructions for use.
Figure 14 is the front view of the moving contact illustrated according to a second embodiment of the present invention.As shown in figure 14, strip moving contact 20b is provided with rotating hole 202b and force-bearing hole 204b in the part away from moving contact.According to the present embodiment, rotating shaft 12b is through force-bearing hole 204b, load axle 14b and force-bearing hole 204b the polygonized structure cooperatively interacted through rotating hole 202b, load axle 14b.
In addition, moving contact 20b yet forms both the thin segment 220 that thickness is less than the thickness of other parts in the end away from moving contact, step down when thin segment 220 is for installing torsion spring 18b.
Figure 15 is the cutaway view of the rotating shaft illustrated according to a second embodiment of the present invention.As shown in figure 15, rotating shaft 30b has cavity 308b.Moving contact 20b can through the cavity 308b of rotating shaft 30b.Rotating shaft 30b is formed with the first location notch 302b and the second location notch 306b towards the two opposite side walls of cavity 308b, and wherein, the first location notch 302b is for installing rotating shaft 12b, and the second location notch 306b is used for mounting spring and wears axle 16b.The rotating shaft 12b of moving contact 20b is installed in the first symmetrical location notch 302b of (such as, being hinged to) two.During installation, the two ends of rotating shaft 12b are slipped into arc end from the openend of the first location notch 302b simultaneously, and fit with arc end, realize moving contact 20b and rotating shaft 30b installs.After installation, moving contact 20b can rotate relative to rotating shaft 30b centered by rotating shaft 12b.
As shown in Figure 9, when contact rotating shaft system is installed, moving contact 20b, rotating shaft 12b, load axle 14b are first assembled into one, and are passed the cavity 308b of rotating shaft 30b, and rotating shaft 12b slips into along the openend of the first location notch 302b (see accompanying drawing 15).Torsion spring 18b is set on spring and wears on axle 16b, and spring is worn and axle 16b is arranged on (such as, being hinged to) second in location notch 306b (see accompanying drawing 15).The first torque arm mounting of torsion spring 18b is fixed on rotating shaft 30b, the seamed edge of the straightway of the second torque arm 802 and load axle 14b against.The active force of torsion spring 18b makes aforementioned elements be assembled into the first settling position as shown in Figure 9.
In addition, in order to avoid bending section 808 along the outer surface slippage of rotating shaft 30b, preferably, as shown in figure 15, rotating shaft 30b is also formed with the location division 322 for locating bending section 808, and location division 322 is preferably groove, and bending section 808 is positioned at groove and realizes location.More preferably, the first location notch 302b is horizontally disposed with, and the second location notch 306b relative horizontal position is angle of inclination, so arranges the die sinking difficulty that can reduce rotating shaft 30b, is convenient to the installation of moving contact 20b simultaneously.
The structure of location division 322 is not limited only to groove, can also be the projection being formed at rotating shaft 30b outer surface.Such as, bending section 808 is articulated in this projection and realizes location.
Figure 16 illustrates contact rotating shaft system according to a second embodiment of the present invention respectively at the first settling position and the schematic diagram of scolding out critical localisation.As shown in figure 16, the support force F that the straightway 802 that the load axle 14b of moving contact 20b is subject to torsion spring 18b provides
21, F
21to the moment that rotating shaft 12b produces, moving contact 20b and rotating shaft 30b is fitted, and make moving contact be positioned at the first settling position; When moving contact 20b is scolded out, and the support force F that the straightway 802 that the load axle 14b working as moving contact 20b is subject to torsion spring 18b provides
2during axle center through rotating shaft 12b, moving contact 20b is positioned at and scolds out critical localisation.
Figure 17 illustrates contact rotating shaft system according to a second embodiment of the present invention respectively at the schematic diagram of the first settling position and the second settling position.
After moving contact is crossed and is scolded out critical localisation, the support force F that the straightway 802 of torsion spring 18b provides
22change the direction of the moment of rotating shaft 12b, this moment makes moving contact 20b continue to open, when moving contact 20b scolded out to be separated with rotating shaft and to be stabilized in a certain settling position time, now, moving contact is positioned at the second settling position.
Below in conjunction with the second embodiment, the course of action that contact rotating shaft system is scolded out and resetted is described.
When Short-Circuit High Current by time, under the acting in conjunction of loop Lorentz force and Hall nurse power, electrodynamic repulsion force overcomes the active force of torsion spring 18b, and moving contact 20b is scolded out.Scolding in open procedure, when the active force of straightway 802 couples of load axle 14b of torsion spring second torque arm is through rotating shaft 12b center, moving contact is positioned at scolds out critical localisation.Moving contact continues to scold out and after crossing and scolding out critical localisation, the moment of active force to moving contact 20b of torsion spring 18b makes moving contact be stabilized in the second settling position.
After moving contact is positioned at the second settling position, mechanism threads off under the effect of overcurrent release, rotating shaft 30b by under the driving effect of lower link to the sideway swivel near large lid, because of the active force of torsion spring 18b, moving contact 20b rotates with rotating shaft.Simultaneously, the limiting section coordinated with moving contact top 206b covered greatly, the rotation of moving contact 30b is equal in the downward actuating force of 206b place, moving contact top applying, load axle 14b linearly section 802 slides back to, until pressure F2 crosses the center of rotating shaft 12b, be reset to the first settling position at the effect lower moving contact of opposing torque.
Moving contact 20b scolds out with in reseting procedure, the seamed edge of polygon load axle 14b moves along straightway 802, compared with circular load axle, moving contact 20b arrives from the first settling position and scolds out the corner of critical localisation less, thus makes it cross to scold out the repulsion needed for critical localisation also just less.In addition, the load axle of polygonized structure makes moving contact in rotation process, the normal direction of the contact plane of torsion spring 18b and load axle 14b constantly changes with the rotation of moving contact, comprehensively solve and scold out slow and that reset force is large problem, the speed of critical localisation is faster, reset force is less by scolding out to make moving contact 20b.In the present embodiment, load axle 14b is preferably square shaft.Certain load axle 14b can also be pentagon axle, hexagonal shaft etc.
The contact rotating shaft system of the second embodiment of the present invention also comprises for limiting moving contact by the position limiting structure of extreme position of scolding out.Particularly, as shown in Figure 10,14, position limiting structure comprises and is arranged on the spacing preiection 222 of moving contact 20b away from one end of moving contact 208b, and is sleeved on spring and wears spacer ring 15b on axle 16b.When moving contact is scolded out, spacing preiection 222 and spacer ring 15b against and spacing.Meanwhile, spacing preiection 222 also has the effect relaxing impact force.Selectively, position limiting structure can also scold open the embodiment of extreme position to arrange for limiting moving contact with reference in the first embodiment, also can be set to other and can be used for spacing structure.
Further, rotating shaft 30b is also formed with guiding shoulder 320, and guiding shoulder 320 is for improving centering during moving contact motion.Particularly, as shown in figure 11, guiding shoulder 320 is arranged on the two opposite side walls of the front top of cavity 308b (side near moving contact 208b), and from two opposite side walls to extending near the side of moving contact 20b and comparatively small―gap suture reserved with moving contact 20b.Moving contact 20b is scolding out or in reseting procedure, and moving contact 20b can move along the spigot surface of guiding shoulder 320, to play guide effect, avoid moving contact because of deflection clamping stagnation or motion not smooth.
In the contact rotating shaft system of two kinds of embodiments provided by the invention, all 206a, 206b place, moving contact top can be provided with chamfering 207, respectively as shown in Fig. 3 and Figure 14, this chamfering 207 can form arc leading angle electric arc being introduced arc control device, can play the effect of accelerating cooling and extinguish arcs.
Further, moving contact 20a, 20b all can be provided with arc insulating cover 10.As shown in Figure 9, arc insulating cover 10 is arranged near moving contact side on moving contact, to reduce the interference of the electric arc produced when moving contact engages or is separated between contact.The concrete shape of arc insulating cover 10 and size can be arranged according to the applied environment of contact rotating shaft system.Such as, the height of the voltage of the power distribution network applied according to contact rotating shaft system can select the coated length of arc insulating cover 10 pairs of moving contacts, to increase the insulation property of arc insulating cover 10.In the present embodiment, when ensureing that moving contact realizes predetermined function, can arrange in cavity that arc insulating cover 10 extends to rotating shaft coated with what realize moving contact greater depth, thus improving the insulation property of the arc insulating cover 10 under high voltage.
More preferably, arc insulating cover 10 can be made up of polyamide, and polyamide has good thermal endurance and anti-flammability.Arc insulating cover 10 can also be made up of other insulating material.
In addition, in above-described two kinds of embodiments, rotating shaft 12a, 12b and load axle 14a, 14b are all the parts be separated with moving contact 20b.But, it will be appreciated by those skilled in the art that and the present invention is not limited thereto.Such as, rotating shaft 12a, 12b and/or load axle 14a, 14b also can form with moving contact 20b.
Present invention also offers the low tension switch with above-mentioned contact rotating shaft system, this contact rotating shaft system is the contact rotating shaft system described in above-mentioned either a program, because this contact rotating shaft system has above-mentioned technique effect, the low tension switch comprising this contact rotating shaft system also should have identical technique effect.
The break-time of low tension switch weighs the very important index of of properties of product, and break-time is shorter, less, safer to the harm of low tension switch.When Short-Circuit High Current is passed through, before mechanism completes dropout, the trend and action of scolding out is had under the effect of Hall nurse power two repulsion of moving contact between loop Lorentz force and contact, due to the effect of the end pressure spring of moving contact, moving contact back and forth can tremble, until mechanical unlocking scolding to hold between return.The vibration of moving contact is large especially to the harm of low tension switch, very easily burns out contact.The contact rotating shaft system that the present invention has dropproof function can overcome the above problems well, when Short-Circuit High Current is passed through, before mechanical unlocking, moving contact is scolded out and is stabilized in the second settling position under the effect of repulsion, not only avoids the vibration of moving contact but also shorten break-time.
Although reference example embodiment describes the present invention, it should be understood that, the present invention is not limited to the structure of above-described embodiment.On the contrary, the invention is intended to cover various modification and equivalent arrangements.In addition, although illustrated the various elements of disclosed invention in various exemplary combination body and structure, other combination comprising more, less element has also fallen within the scope of the present invention.
Claims (10)
1. a contact rotating shaft system, comprising:
Moving contact, its part away from moving contact is provided with rotating shaft and load axle;
Rotating shaft, is formed with cavity, and described rotating shaft is formed with the first location notch towards the two opposite side walls of described cavity; And
Axle worn by spring and spring;
Wherein, described moving contact is through the cavity of described rotating shaft, and the two ends of described rotating shaft are installed in the first location notch described in two respectively, and described moving contact can rotate in the cavity of described rotating shaft centered by described rotating shaft,
Utilize described spring, axle worn by described spring and described moving contact is arranged in described rotating shaft by described load axle,
Described contact rotating shaft system is configured to, when described spring put on torque that the active force on described load axle formed described rotating shaft, described moving contact and described rotating shaft are fitted time, described moving contact is positioned at the first settling position; When described spring puts on torque that the active force on described load axle formed described rotating shaft, makes described moving contact to be separated with described rotating shaft and can be stabilized in separation point position, now, described moving contact is positioned at the second settling position.
2. contact rotating shaft system according to claim 1, wherein
Described moving contact is formed with away from the part of moving contact groove of stepping down,
The described rotating shaft part corresponding with described groove of stepping down is formed with curved face part, and described curved face part comprises the first recess, the second recess and the first protuberance between described first recess and described second recess,
Described spring is extension spring, and the described spring of groove of stepping down described in being positioned at is worn axle and passed the first end of described extension spring and apply active force in described curved face part, and described load axle passes the second end of described extension spring and applies active force in described moving contact,
Wherein, when described spring wear axle be positioned at described first protuberance time, described extension spring reaches maximal tensility, and described moving contact is positioned at scolds out critical localisation; When described extension spring put on torque that the active force on described load axle formed described rotating shaft, described moving contact and described rotating shaft are fitted time and be positioned at described first recess when axle worn by described spring, described moving contact is positioned at described first settling position; When described spring puts on torque that the active force on described load axle formed described rotating shaft, makes described moving contact to be separated with described rotating shaft and can be stabilized in separation point position and described spring is worn axle and is positioned at described second recess, described moving contact is positioned at described second settling position.
3. contact rotating shaft system according to claim 2, wherein, described groove of stepping down has the High lateral wall and low sidewall that are oppositely arranged, described High lateral wall and described low sidewall have difference in height, described High lateral wall can against and the described spring of stepping down in groove described in promoting wear axle and move to described second recess by described first recess; The seamed edge on the top of described low sidewall can against and promote described spring and wear axle and move to described first recess by described second recess.
4. contact rotating shaft system according to claim 1, wherein
Described load axle is polygon shaft;
Described rotating shaft is also formed with the second location notch towards the two opposite side walls of described cavity;
Described spring is torsion spring, and described spring is worn axle and is installed in the second location notch described in two through the hollow structure of described torsion spring, the first torque arm of described torsion spring and described rotating shaft against, the second torque arm of described torsion spring and described load axle against,
Wherein, when described second torque arm passes the center of described rotating shaft to the active force of described load axle, described moving contact is in scolds out critical localisation; When the torque that the active force of described second torque arm to described load axle is formed described rotating shaft, described moving contact and described rotating shaft are fitted time, described moving contact is positioned at described first settling position; When the torque that the active force of described second torque arm to described load axle is formed described rotating shaft, make described moving contact be separated with described rotating shaft and be stabilized in separation point position time, described moving contact is positioned at described second settling position.
5. contact rotating shaft system according to claim 4, wherein, described torsion spring is block form torsion spring.
6. contact rotating shaft system according to claim 4, wherein, described rotating shaft is also provided with guiding shoulder, and described moving contact can move along the spigot surface of described guiding shoulder.
7. the contact rotating shaft system according to any one of claim 1 to 5, wherein said contact rotating shaft system also comprises position limiting structure, and described position limiting structure is for limiting described moving contact by the extreme position of scolding out.
8. contact rotating shaft system according to claim 2, wherein said spring is worn axle and is provided with two prerotation vanes, and the both sides being distributed in described moving contact of two described prerotation vane symmetries think that the motion of described moving contact provides guiding.
9. the contact rotating shaft system according to any one of claim 1 to 5, wherein said moving contact is provided with arc insulating cover.
10. a low tension switch, comprises contact rotating shaft system, wherein, and the contact rotating shaft system of described contact rotating shaft system according to any one of claim 1 to 9.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610075906.9A CN105551840B (en) | 2016-02-03 | 2016-02-03 | Contact rotating shaft system and low tension switch |
| PCT/CN2016/109164 WO2017133317A1 (en) | 2016-02-03 | 2016-12-09 | Contact rotating shaft system and low-voltage switch |
| BR112018014474A BR112018014474A2 (en) | 2016-02-03 | 2016-12-09 | contact system and shaft and low voltage switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610075906.9A CN105551840B (en) | 2016-02-03 | 2016-02-03 | Contact rotating shaft system and low tension switch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105551840A true CN105551840A (en) | 2016-05-04 |
| CN105551840B CN105551840B (en) | 2018-08-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610075906.9A Active CN105551840B (en) | 2016-02-03 | 2016-02-03 | Contact rotating shaft system and low tension switch |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN105551840B (en) |
| BR (1) | BR112018014474A2 (en) |
| WO (1) | WO2017133317A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106128883A (en) * | 2016-08-08 | 2016-11-16 | 张文红 | A kind of double-breakpoint contact system for low-voltage circuit breaker |
| CN106601564A (en) * | 2016-12-01 | 2017-04-26 | 上海电器科学研究所（集团）有限公司 | Electric contact system |
| WO2017133317A1 (en) * | 2016-02-03 | 2017-08-10 | 首瑞（天津）电气设备有限公司 | Contact rotating shaft system and low-voltage switch |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108735557B (en) * | 2018-08-07 | 2024-03-22 | 江苏凯隆电器有限公司 | Repulsion unlocking device of breaker moving contact and working method thereof |
| CN108878230B (en) * | 2018-08-23 | 2024-04-16 | 无锡新宏泰电器科技股份有限公司 | Limiting structure of breaker contact |
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| CN101986413B (en) * | 2010-11-11 | 2012-10-03 | 江苏辉能电气有限公司 | Moving contact clamping mechanism for molded case low-voltage breaker |
| CN105551840B (en) * | 2016-02-03 | 2018-08-21 | 首瑞（天津）电气设备有限公司 | Contact rotating shaft system and low tension switch |
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2016
- 2016-02-03 CN CN201610075906.9A patent/CN105551840B/en active Active
- 2016-12-09 BR BR112018014474A patent/BR112018014474A2/en active Search and Examination
- 2016-12-09 WO PCT/CN2016/109164 patent/WO2017133317A1/en active Application Filing
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| US5023416A (en) * | 1989-10-03 | 1991-06-11 | Fuji Electric Co., Ltd. | Circuit breaker |
| CN101826426A (en) * | 2010-04-16 | 2010-09-08 | 江苏辉能电气有限公司 | Contact locking device of single-breakpoint molded-case low-voltage circuit breaker |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2017133317A1 (en) * | 2016-02-03 | 2017-08-10 | 首瑞（天津）电气设备有限公司 | Contact rotating shaft system and low-voltage switch |
| CN106128883A (en) * | 2016-08-08 | 2016-11-16 | 张文红 | A kind of double-breakpoint contact system for low-voltage circuit breaker |
| CN106128883B (en) * | 2016-08-08 | 2019-11-05 | 张文红 | A kind of double-breakpoint contact system for low-voltage circuit breaker |
| CN106601564A (en) * | 2016-12-01 | 2017-04-26 | 上海电器科学研究所（集团）有限公司 | Electric contact system |
| CN106601564B (en) * | 2016-12-01 | 2018-08-17 | 上海电器科学研究所（集团）有限公司 | A kind of electric contact-system |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2017133317A1 (en) | 2017-08-10 |
| CN105551840B (en) | 2018-08-21 |
| BR112018014474A2 (en) | 2018-12-11 |
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