CN205376319U - Contact pivot system and low tension switchgear - Google Patents
Contact pivot system and low tension switchgear Download PDFInfo
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- CN205376319U CN205376319U CN201620115725.XU CN201620115725U CN205376319U CN 205376319 U CN205376319 U CN 205376319U CN 201620115725 U CN201620115725 U CN 201620115725U CN 205376319 U CN205376319 U CN 205376319U
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- rotating shaft
- moving contact
- contact
- spring
- axle
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Abstract
The utility model relates to a contact pivot system and low tension switchgear. The utility model discloses a contact pivot system, wear the axle including moving contact, pivot and spring and spring. The moving contact can be at the cavity internal rotation of pivot to the load shaft locking moving contact and the pivot that utilize spring, spring to wear on axle and the moving contact make it to form contact pivot system. The 2nd stable position when stable position when contact pivot system structure becomes to have the moving contact with the pivot laminating and moving contact and pivot separate. The utility model provides a contact pivot system for the moving contact is scolding out the process to have dropproof function, has reduced frequency and number of times that the moving contact vibrates, has improved contact pivot system in breaking process, and the movable contact frequently contacts with the stationary contact, scolds out, contacts the scaling loss that causes again, has shortened the short circuit breaking time. The utility model also discloses a low tension switchgear that has above -mentioned contact pivot system.
Description
Technical field
This utility model relates to low-voltage electrical apparatus, relates 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, and including moving contact and rotating shaft two parts, rotating shaft is supports contacts and the parts that contact can be rotated.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 critically 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 static contact, thus disconnecting circuit.Break includes movement time of overcurrent trip and electrical apparatus release touches the time that draw bar makes snap close trip.
But, when Short-Circuit High Current is passed through, mechanism, before threading off, while moving contact Hall nurse power between two repulsion and loop Lorentz force and contact under effect, has the trend and action scolded out.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 static contact, causes the scaling loss even adhesion of moving contact and static contact, and more serious possibility makes chopper burn.
Therefore, when Short-Circuit High Current is passed through, shorten break, reduce the frequency of the reciprocal vibration of moving contact, be those skilled in the art's technical problems urgently to be resolved hurrily.
Utility model content
In view of above-mentioned technological deficiency, the purpose of this utility model is in that to provide a kind of contact rotating shaft system, it is possible to decrease moving contact is the frequency of reciprocal vibration in scolding open procedure, reduces the scaling loss of moving contact and static contact.Another object of the present utility model is in that to provide a kind of low tension switch with above-mentioned contact rotating shaft system.
To achieve these goals, this utility model takes following technical scheme:
A kind of contact rotating shaft system, including moving contact, it is provided with rotating shaft and load axle away from the part of movable contact；Rotating shaft, is formed with cavity, and described rotating shaft is formed with the first locating slot towards the two opposite side walls of described cavity；And spring and spring wear axle；Wherein, the cavity of the described moving contact described rotating shaft of traverse, the two ends of described rotating shaft are respectively arranged in the first locating slot described in two, described moving contact can rotate in the cavity of described rotating shaft centered by described rotating shaft, utilize described spring, described spring to wear axle 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 puts on torque that described rotating shaft forms by the active force on described load axle, makes described moving contact and described rotating shaft laminating, described moving contact is positioned at the first settling position；When described spring puts on torque that described rotating shaft forms by the active force on described load axle, makes described moving contact separate with described rotating shaft and can stably in separation point position, now, described moving contact is positioned at the second settling position.
Utilize contact rotating shaft system of the present utility model, when Short-Circuit High Current is passed through, spring puts on torque that rotating shaft forms by the active force on load axle, moving contact is separated and can stably at the second settling position with rotating shaft, moving contact is made to scold open procedure to have dropproof function, reduce frequency and the number of times of moving contact vibration, improve contact rotating shaft system in breaking course, movable contact frequently contact with stationary contact, scold out, contact the scaling loss caused again, shorten the short circuit breaking time.
Preferably, described moving contact is formed in part with, away from movable contact, groove of stepping down, what described rotating shaft was corresponding with described groove of stepping down is formed in part with curved face part, described curved face part includes the first recess, second recess and the first protuberance between described first recess and described second recess, described spring is extension spring, the axle the first end 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, second end of the described load axle described extension spring of traverse, 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 puts on torque that described rotating shaft forms by the active force on described load axle, makes described moving contact and described rotating shaft laminating 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 described rotating shaft forms by the active force on described load axle, makes described moving contact separate with described rotating shaft and stably can wear axle in separation point position and described spring to be 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 promotion described in the described spring in groove of stepping down wear axle and moved to described second recess by described first recess；The seamed edge on the top of described low sidewall can against and promote described spring to wear axle to be moved to described first recess by described second recess.
Preferably, described load axle is polygon shaft；Described rotating shaft is also formed with the second locating slot towards the two opposite side walls of described cavity；Described spring is torsion spring, described spring is worn axle and through the hollow structure of described torsion spring and is positioned in the second locating slot 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 is to the center of the active force described rotating shaft of traverse of described load axle, described moving contact is in scolds out critical localisation；When the torque that described rotating shaft is formed by described second torque arm by the active force of described load axle, make described moving contact and described rotating shaft laminating time, described moving contact is positioned at described first settling position；The torque that described rotating shaft formed by the active force of described load axle when described second torque arm, described moving contact being separated with described rotating shaft and stablizes when separation point position, described moving contact is positioned at described second settling position.
Preferably, described torsion spring is block form torsion spring.
Preferably, described rotating shaft being additionally provided with guiding shoulder, described moving contact can move along the spigot surface of described guiding shoulder.
Preferably, described contact rotating shaft system also includes position limiting structure, and described position limiting structure is for limiting the extreme position that described moving contact is scolded 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.
This utility model additionally provides a kind of low tension switch, and including contact rotating shaft system, wherein, described contact rotating shaft system is the contact rotating shaft system described in any of the above-described item.
The low tension switch that this utility model provides includes 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 drawings below of the application is used for understanding the application in this as the part of the application.Embodiment shown in accompanying drawing and description thereof are used for explaining principle of the present utility model.In the accompanying drawings:
Fig. 1 is the sectional view illustrating contact rotating shaft system according to first embodiment of the present utility model when the first settling position.
Fig. 2 is the top view illustrating the contact rotating shaft system according to first embodiment of the present utility model.
Fig. 3 be illustrate moving contact according to first embodiment of the present utility model front view.
Fig. 4 be illustrate rotating shaft according to first embodiment of the present utility model sectional view.
Fig. 5 is the schematic diagram of an embodiment of the curved face part illustrating the rotating shaft according to first embodiment of the present utility model.
Fig. 6 is the schematic diagram scolding out critical localisation illustrating the contact rotating shaft system according to first embodiment of the present utility model.
Fig. 7 illustrates that the contact rotating shaft system according to first embodiment of the present utility model is scolding out the schematic diagram of extreme position.
Fig. 8 illustrates that contact rotating shaft system according to first embodiment of the present utility model is respectively at the first settling position, the second settling position and the schematic diagram scolding out extreme position.
Fig. 9 is the sectional view illustrating contact rotating shaft system according to the second embodiment of the present utility model when the first settling position.
Figure 10 is the right view illustrating the contact rotating shaft system according to the second embodiment of the present utility model.
Figure 11 is the top view illustrating the contact rotating shaft system according to the second embodiment of the present utility model.
Figure 12 is the front view of an embodiment of the torsion spring illustrating the contact rotating shaft system according to the second embodiment of the present utility model.
Figure 13 is the top view of an embodiment of the torsion spring illustrating the contact rotating shaft system according to the second embodiment of the present utility model.
Figure 14 is the front view illustrating the moving contact according to the second embodiment of the present utility model.
Figure 15 is the sectional view illustrating the rotating shaft according to the second embodiment of the present utility model.
Figure 16 illustrates contact rotating shaft system according to the second embodiment of the present utility model schematic diagram at the first settling position and when scolding out critical localisation respectively.
Figure 17 illustrates that contact rotating shaft system according to the second embodiment of the present utility model is respectively at the schematic diagram of the first settling position and the second settling position.
Detailed description of the invention
Hereinafter, embodiment of the present utility model is described with reference to the accompanying drawings.Detailed description below and accompanying drawing are for exemplarily illustrating that principle of the present utility model, this utility model are not limited to described preferred embodiment, and scope of the present utility model is defined by the claims.
Fig. 1 is the sectional view illustrating contact rotating shaft system according to first embodiment of the present utility model when the first settling position.As it is shown in figure 1, contact rotating shaft system 1 includes moving contact 20a and rotating shaft 30a.Moving contact 20a is provided with rotating shaft 12a away from the part of movable contact.Rotating shaft 30a is formed with cavity 308a, rotating shaft 30a is formed with the first locating slot 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 locating slot 302a, moving contact 20a can rotate relative to rotating shaft 30a with rotating shaft 12a for center of rotation in cavity 308a.
Moving contact 20a and rotating shaft 30a utilizes spring, spring to wear axle and load axle connects 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 rotating shaft 12a is formed by the active force that spring puts on load axle, make moving contact 20a and rotating shaft 30a laminating time, moving contact is positioned at the first settling position；Torque that rotating shaft 12a is formed by the active force put on load axle when spring, moving contact 20a being separated and can stably when separation point position with rotating shaft 30a, moving contact be positioned at the second settling position.
Utilize scheme of the present utility model, scold in open procedure at moving contact, can by stable for moving contact 20a at the second settling position, to reduce frequency and the number of times that moving contact frequently trembles, improve in breaking course, frequently contact between movable contact with stationary contact, scold out, contact the scaling loss caused again.Meanwhile, when moving contact is in the second settling position, the electric arc produced between movable contact and stationary contact is easily subject to the magnetic effect of arc extinguishing grid pieces and enters arc-chutes, it is possible to accelerate the cutting to electric arc, shortens the short circuit breaking time.
Above-mentioned contact rotating shaft system, two kinds of embodiments disclosed in this utility model, below in conjunction with accompanying drawing, each embodiment is described in detail.
Fig. 2 illustrates the contact rotating shaft system top view according to first embodiment of the present utility model.
As shown in Fig. 1～2, contact rotating shaft system 1 mainly includes moving contact 20a, rotating shaft 30a, and axle 16a and two extension spring 18a worn by spring.Being welded with movable contact 208a on moving contact 20a, the side away from movable 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.Spring is worn axle 16a and is positioned at the groove 210 of stepping down of moving contact 20a.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 spring is worn the two ends of axle 16a and is articulated in the curved face part of rotating shaft 30a simultaneously and can move along curved face part.Under the pulling force effect of extension spring 18a, moving contact 20a and rotating shaft 30a may be mounted to the first settling position as shown in Figure 1.
Fig. 3 is the front view illustrating the moving contact according to first embodiment of the present utility model.As it is shown on figure 3, strip moving contact 20a is provided with rotating hole 202a, force-bearing hole 204a in the part away from movable contact 208a.According to the present embodiment, rotating shaft 12a traverse rotating hole 202a, load axle 14a traverse force-bearing hole 204a.
Moving contact 20a is formed in part with, away from movable 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 being oppositely arranged 214 and low sidewall 215, High lateral wall 214 and low sidewall 215 and has difference in height.When moving contact 20a scolds out, the wall of High lateral wall 214 spring is promoted to wear axle 16a；When moving contact resets, the seamed edge 216 on the top of low sidewall 215 spring is promoted to wear axle 16a.The position that the thrust of axle 16a worn by spring by seamed edge 216 is relatively big with the distance of rotating hole 202a, and the arm of force that namely rotating hole 202a place is formed moment is relatively big, and therefore required when resetting for moving contact 20a reset force is relatively small.Certainly, the structure of groove 210 of stepping down also has other embodiments, and those skilled in the art can be arranged according to the function that expection to reach and effect selection.
Fig. 4 is the sectional view illustrating the rotating shaft according to first embodiment of the present utility model.As shown in Figure 4, rotating shaft 30a has cavity 308a.Moving contact 20a can pass the cavity 308a of rotating shaft 30a.The rotating shaft 12a that rotating shaft 30a has the first locating slot 302a (another is not shown), moving contact 20a towards two opposed inner walls of cavity 308a is installed in (such as, being hinged to) two first symmetrical locating slot 302a.During installation, the two ends of rotating shaft 12a are slipped into arc end from the opening of the first locating slot 302a simultaneously, and fit with arc end, it is achieved 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, what rotating shaft 30a was corresponding with groove 210 of stepping down is formed in part 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 include first recess the 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 rotating shaft 12a is formed by the extension spring 18a active force put on load axle 14a, make moving contact 20a and rotating shaft 30a laminating time and be positioned at the first recess 310 when axle 16a worn by spring, moving contact is positioned at the first settling position；The torque that rotating shaft 12a formed when the spring 18a active force put on load axle 14a, moving contact 20a being separated with rotating shaft 30a and stablizes in separation point position and be positioned at the second recess 311 when axle 16a worn by spring, moving contact is positioned at the second settling position.
Specifically, as it is shown in figure 5, Fig. 5 is the schematic diagram of an embodiment of the curved face part illustrating the rotating shaft according to first embodiment of the present utility model.Curved face part includes segmental arc 901,902,903,904,906 and straightway 905.Preferably, the diameter that the curved surface diameter of segmental arc 901,906 wears axle 16a with spring is identical, 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 arc surface part and the straightway 905 of segmental arc 906.First recess 310 is corresponding to first settling position of moving contact 20a；Second recess 311 is corresponding to second settling position of moving contact 20a, and second settling position particular location in the second recess 311 is determined by the rigidity of extension spring 18a.Additionally, the first protuberance 312 is such as the curvature portion being formed by connecting by segmental arc 902,903,904.
More preferably, segmental arc 902 and 901 is tangent, and the two ends of segmental arc 903 are tangent with arc tips 902,904 respectively, and segmental arc 904 is also tangent with straightway 905.Additionally, the diameter of segmental arc 903 is preferably less than segmental arc 902.The segmental arc 903 of small diameter can play acceleration, it is possible to making moving contact 30a scold the open procedure starting stage, 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, the open procedure of scolding arrived after scolding out critical localisation can be accelerated by segmental arc 904.
It will be appreciated by those skilled in the art that segmental arc and the mutual relation of above-described first recess, the second recess and the first protuberance is merely exemplary.In addition, any any shape being capable of this utility model purpose and structure can be applied to the first recess, the second recess and the first protuberance.
Shown in Fig. 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 is corresponding to the length of extension spring 18a.Scolding out critical localisation, the maximal tensility of L1 correspondence extension spring 18a.L0 and L2 is respectively less than L1, i.e. extension spring length when the first settling position and the second settling position is respectively less than the length of extension spring when scolding out critical localisation.Preferably, L0, L1 and L2 magnitude relationship can be expressed as: L0 < L2 < L1, (L1-L0) > (L1-L2).It is maximum that moving contact 30a arrives the energy storage of extension spring 18a when scolding out critical localisation, and the speed that moving contact continues to open can be faster.Scolding out after stablizing, the reset force of the moving contact directly related with extension spring power can be less, and reset is easier to.
Fig. 6 illustrates that the moving contact according to first embodiment of the present utility model is positioned at the schematic diagram scolding out critical localisation.Now, spring is worn axle 16a and is positioned at the first protuberance 312.
Fig. 7 illustrates that the moving contact according to first embodiment of the present utility model is positioned at the schematic diagram scolding out extreme position.Scolding out extreme position is the maximum position that moving contact can be scolded out under the effect of electrodynamic repulsion force, the difference of the rigidity according to the extension spring 18a arranged, the stroke that moving contact is moved to the second settling position by the first settling position is moved to the stroke scolding out extreme position less than or equal to moving contact by the first settling position.
Fig. 8 is the moving contact illustrating according to first embodiment of the present utility model schematic diagram when laying respectively at the first settling position, the second settling position and scold out extreme position.As shown in Figure 8, when moving contact 20a is subject at load axle 14a place along extension spring 18a axle center and points to spring and wears the tensile force f of axle 16a11, F11The rotating shaft 12a moment produced is made moving contact 20a be fitted on rotating shaft 30a and is positioned at the first settling position；When moving contact 20a is subject to pointing to the component F of the tension spring tension of seamed edge 21612, F12Moving contact 20a is made to separate with rotating shaft 30a and stablize at the second settling position the rotating shaft 12a moment produced；Scolding out extreme position is the maximum position that moving contact is scolded out.
The contact rotating shaft system that this utility model provides, it is possible to ensureing to scold out with in reseting procedure at moving contact 20a, spring is worn axle 16a and can be synchronized with the movement and not skewed along the curved face part on rotating shaft 30a all the time.Specifically, as in figure 2 it is shown, axle 16a worn by spring is provided with two prerotation vanes 602, the both sides being arranged on moving contact 20a of two prerotation vane 602 symmetries the motion for moving contact 20a provide guiding.Arranging of two prerotation vanes 602 can be fit with moving contact 20a, it is also possible to is 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.The parts that prerotation vane 602 can be independent are set with and are fixed on spring and wear on axle 16a, it is possible to be formed directly into spring and wear on axle 16a.
Further, contact rotating shaft system also includes the position limiting structure for limiting the moving contact 20a extreme position scolded out.Specifically, as shown in figs. 34, moving contact 20a is formed near the position of force-bearing hole 204a and scolds out spacing preiection 212, position corresponding with scolding out spacing preiection 212 for rotating shaft 30a 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.
Additionally, the seamed edge 216 of the groove 210 of stepping down of moving contact also spring can be worn axle 16a spacing, with the opening angle controlled when moving contact 20a scolds out and cushion impact force.
Certainly, position limiting structure can also be arranged contact site other of moving contact 20a and rotating shaft 30a are any, as long as spacing requirement can be met.It addition, the confined planes of position limiting structure can also is that the curved surface etc. of plane or other shapes.
Contact rotating shaft system below in conjunction with the first embodiment of this utility model offer illustrates the course of action that moving contact is scolded out and resetted.
When Short-Circuit High Current is passed through, two repulsion (i.e. Hall nurse power between loop Lorentz force and contact) overcome the extension spring 18a moment of torsion provided to be scolded out by moving contact 20a.Now the wall of the High lateral wall 214 of the groove 210 of stepping down of moving contact 20a promotes spring to wear 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-falling, and the extreme position of free-falling is in the segmental arc 906 of the second recess 311.Wearing the extreme position of axle 16a with spring accordingly, moving contact is positioned at scolds out extreme position.And moving contact 20a finally will stabilise at the second settling position.Second settling position correspondence spring 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, and rotating shaft 30a will rotate to the side near big lid under the driving of lower link.Because rotating shaft 30a and moving contact 20a is locked by extension spring 18a, rotating shaft 30a drives moving contact 20a to rotate with.Simultaneously, cover greatly and be provided with and the moving contact top 206a limiting section coordinated, the rotation of moving contact 30a is equal to and applies downward driving force at 206a place, moving contact top, seamed edge 216 promotes spring to wear axle 16a and moves in the curved face part of rotating shaft 30a, until crossing 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.
The contact rotating shaft system of the second embodiment provided for this utility model below, describes in detail below in conjunction with Fig. 9-17.
Fig. 9 is the sectional view illustrating contact rotating shaft system according to the second embodiment of the present utility model when the first settling position.
Figure 10 is the rearview illustrating the contact rotating shaft system according to the second embodiment of the present utility model.
Figure 11 is the top view illustrating the contact rotating shaft system according to the second embodiment of the present utility model.
As shown in figs. 9-11, contact rotating shaft system 1 includes moving contact 20b, axle 16b and torsion spring 18b worn by rotating shaft 30b, spring.Moving contact 20b is welded with movable contact 208b, moving contact 20b one end of movable contact 208b is provided with rotating shaft 12b and load axle 14b.
Figure 12 is the front view of the torsion spring illustrating the contact rotating shaft system according to the second embodiment of the present utility model.
Figure 13 is the top view of the torsion spring illustrating the contact rotating shaft system according to the second embodiment of the present utility model.
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 includes the Part I of symmetry and Part II, 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 includes 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 includes straightway 806 and bending section 808, and the second torque arm includes straightway 802 and linkage section 804.The Part I of torsion spring 18b and Part II are connected by linkage section 804.Part I and Part II molding simultaneously in block form torsion spring production process, error is little, and in work process, synchronicity is good, it is possible to moving contact is greatly reduced and is scolding out and the deflection in reseting procedure.In the present embodiment, it is preferable that the end at straightway 802 arranges the second bending section 805, when the second bending section 805 can avoid moving contact to be positioned at the first settling position, moving contact 20b and torsion spring 18b interferes, and steps down for moving contact 20b.
Certainly, the structure of torsion spring 18b is not limited only to shown in Figure 12～13, and torsion spring 18b can also is that other structure.Such as, two parts of torsion spring 18b can not be symmetry.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 disclosure satisfy that premised on instructions for use.
Figure 14 is the front view illustrating the moving contact according to the second embodiment of the present utility model.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 movable contact.According to the present embodiment, rotating shaft 12b is through rotating hole 202b, load axle 14b through force-bearing hole 204b, and load axle 14b and force-bearing hole 204b is the polygonized structure cooperated.
It addition, moving contact 20b yet forms both the thickness thin segment 220 less than the thickness of other parts in the end away from movable contact, thin segment 220 is stepped down when being used for installing torsion spring 18b.
Figure 15 is the sectional view illustrating the rotating shaft according to the second embodiment of the present utility model.As shown in figure 15, rotating shaft 30b has cavity 308b.Moving contact 20b can pass the cavity 308b of rotating shaft 30b.Rotating shaft 30b is formed with the first locating slot 302b and the second locating slot 306b towards the two opposite side walls of cavity 308b, and wherein, the first locating slot 302b is used for installing rotating shaft 12b, and the second locating slot 306b is used for installing spring and wears axle 16b.The rotating shaft 12b of moving contact 20b is installed in (such as, being hinged to) two first symmetrical locating slot 302b.During installation, the two ends of rotating shaft 12b are slipped into arc end from the opening of the first locating slot 302b simultaneously, and fit with arc end, it is achieved 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 it is shown in figure 9, when contact rotating shaft system is installed, moving contact 20b, rotating shaft 12b, load axle 14b are first assembled integrally, and it are passed through the cavity 308b of rotating shaft 30b, rotating shaft 12b and slip into along the opening of the first locating slot 302b (see accompanying drawing 15).Torsion spring 18b is set on spring and wears on axle 16b, and spring is worn and is arranged on axle 16b in (such as, being hinged to) second locating slot 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.
Additionally, in order to avoid bending section 808 is along the outer surface sliding of rotating shaft 30b, it is preferable that as shown in figure 15, rotating shaft 30b is also formed with the location division 322 for positioning bending section 808, and location division 322 is preferably groove, and bending section 808 is positioned at groove and realizes positioning.More preferably, the first locating slot 302b is horizontally disposed with, the second locating slot inclined angle of 306b relative horizontal position, so arranges the die sinking difficulty that can reduce rotating shaft 30b, simultaneously facilitates the installation of moving contact 20b.
The structure of location division 322 is not limited only to groove, it is also possible to be formed at the projection of rotating shaft 30b outer surface.Such as, bending section 808 is articulated in this projection and realizes location.
Figure 16 illustrates that contact rotating shaft system according to the second embodiment of the present utility model is respectively at the first settling position and the schematic diagram scolding out critical localisation.As shown in figure 16, the load axle 14b of moving contact 20b is subject to the support force F that the straightway 802 of torsion spring 18b provides21, F21The rotating shaft 12b moment produced is made moving contact 20b and rotating shaft 30b laminating, and makes moving contact be positioned at the first settling position；When moving contact 20b is scolded out, and when the load axle 14b of moving contact 20b is subject to the support force F that the straightway 802 of torsion spring 18b provides2When passing the axle center of rotating shaft 12b, moving contact 20b is positioned at and scolds out critical localisation.
Figure 17 illustrates that contact rotating shaft system according to the second embodiment of the present utility model is 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 provides22The direction of the moment of rotating shaft 12b is changed, and this moment makes moving contact 20b continue to open, and is separated with rotating shaft and stablize when a certain settling position when moving contact 20b scolds out, and 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 is passed through, under the combined effect 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.In scolding open procedure, when the active force of load axle 14b is passed rotating shaft 12b center by the straightway 802 of torsion spring the second torque arm, moving contact is positioned at scolds out critical localisation.After moving contact continues to scold out and cross and scolds out critical localisation, the moment of moving contact 20b is made moving contact stable at the second settling position by the active force of torsion spring 18b.
After moving contact is positioned at the second settling position, mechanism threads off under the effect of overcurrent release, and rotating shaft 30b will rotate to the side near big lid under the driving effect of lower link, and because of the active force of torsion spring 18b, moving contact 20b rotates with rotating shaft.Simultaneously, cover greatly with the moving contact top 206b limiting section coordinated, the rotation of moving contact 30b is equal to and applies downward driving force at 206b place, moving contact top, load axle 14b linearly section 802 slides back to, until pressure F2 crosses the center of rotating shaft 12b, the effect lower moving contact at opposing torque is reset to the first settling position.
Moving contact 20b scold out with in reseting procedure, the seamed edge of polygon load axle 14b moves along straightway 802, compared with circular load axle, it is less that moving contact 20b arrives, from the first settling position, the corner scolding out critical localisation, thus also just less over the repulsion needed for scolding out critical localisation.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 is continually changing with the rotation of moving contact, comprehensively solve and scold out slowly and problem that reset force is big so that moving contact 20b pass through to scold out the speed of critical localisation faster, reset force less.In the present embodiment, load axle 14b is preferably square shaft.Certain load axle 14b can also is that pentagon axle, hexagonal shaft etc..
The contact rotating shaft system of the second embodiment of the present utility model also includes the position limiting structure for limiting the extreme position that moving contact is scolded out.Specifically, such as Figure 10, shown in 14, position limiting structure includes being arranged on the moving contact 20b spacing preiection 222 away from one end of movable contact 208b, and is sleeved on the spacer ring 15b that spring is worn 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 with reference in first embodiment for limiting moving contact, it is also possible to is 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.Specifically, 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 movable contact 208b), and from two opposite side walls to extending near the side of moving contact 20b and small gap reserved with moving contact 20b.Moving contact 20b is scolding out or in reseting procedure, moving contact 20b can along guiding shoulder 320 spigot surface move, to play guide effect, it is to avoid moving contact because of deflection clamping stagnation or motion not smooth.
In the contact rotating shaft system of two kinds of embodiments that this utility model provides, 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 the arc leading angle that electric arc introduces arc-chutes, can play and accelerates cooling and extinguish the effect of electric arc.
Further, moving contact 20a, 20b all can be provided with arc insulating cover 10.As it is shown in figure 9, arc insulating cover 10 is arranged on moving contact near movable contact side, to reduce the interference of the electric arc produced when moving contact engages between contact or separates.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 optional arc insulating cover 10 coated length to moving contact of the height of the voltage of the power distribution network applied according to contact rotating shaft system, to increase the insulating properties of arc insulating cover 10.In the present embodiment, when ensureing that moving contact realizes predetermined function, it is possible to arc insulating cover 10 is set and extends to the interior cladding with realization to moving contact greater depth of cavity of rotating shaft, thus the insulating properties of the arc insulating cover 10 under improving high voltage.
More preferably, arc insulating cover 10 can be made up of polyamide, and polyamide has good thermostability and anti-flammability.Arc insulating cover 10 can also be made up of other insulant.
Additionally, in above-described two kinds of embodiments, rotating shaft 12a, 12b with load axle 14a, 14b are all and the moving contact 20b parts separated.It will be understood by those skilled in the art, however, that this utility model is not limited to this.Such as, rotating shaft 12a, 12b and/or load axle 14a, 14b can also form with moving contact 20b.
This utility model additionally provides the low tension switch with above-mentioned contact rotating shaft system, this contact rotating shaft system is the contact rotating shaft system described in any of the above-described scheme, owing to 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 of low tension switch is the critically important index weighing properties of product, and break is more short, and the harm of low tension switch is more little, more safe.When Short-Circuit High Current is passed through, before mechanism completes to thread off, have, under the effect of moving contact Hall two repulsion of nurse power between loop Lorentz force and contact, the trend and action scolded out, effect due to the end pressure spring of moving contact, moving contact back and forth can tremble scolding to hold between return, until mechanical unlocking.The vibration of moving contact is big especially to the harm of low tension switch, very easily burns out contact.This utility model has the contact rotating shaft system of dropproof function can solve problem above well, when Short-Circuit High Current is passed through, before mechanical unlocking, moving contact is scolded out and stable at the second settling position under the effect of repulsion, not only avoids the vibration of moving contact but also shorten break.
Although describing this utility model by reference to exemplary embodiment, however, it is understood that this utility model is not limited to the structure of above-described embodiment.On the contrary, this utility model is intended to cover various modification and equivalent arrangements.Although it addition, illustrated the various elements of disclosed utility model in various exemplary combination bodies and structure, but other combination including more, less element also drops within scope of the present utility model.
Claims (10)
1. a contact rotating shaft system, it is characterised in that described contact rotating shaft system includes:
Moving contact, it is provided with rotating shaft and load axle away from the part of movable contact；
Rotating shaft, is formed with cavity, and described rotating shaft is formed with the first locating slot 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 respectively arranged in the first locating slot described in two, and described moving contact can rotate in the cavity of described rotating shaft centered by described rotating shaft,
Utilize described spring, described spring to wear axle and described moving contact be arranged in described rotating shaft by described load axle,
Described contact rotating shaft system is configured to, and when described spring puts on torque that described rotating shaft forms by the active force on described load axle, makes described moving contact and described rotating shaft laminating, described moving contact is positioned at the first settling position；When described spring puts on torque that described rotating shaft forms by the active force on described load axle, makes described moving contact separate with described rotating shaft and can stably in separation point position, now, described moving contact is positioned at the second settling position.
2. contact rotating shaft system according to claim 1, it is characterised in that
Described moving contact is formed in part with, away from movable contact, groove of stepping down,
What described rotating shaft was corresponding with described groove of stepping down is formed in part with curved face part, and described curved face part includes 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 puts on torque that described rotating shaft forms by the active force on described load axle, makes described moving contact and described rotating shaft laminating 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 described rotating shaft forms by the active force on described load axle, makes described moving contact separate with described rotating shaft and stably can wear axle in separation point position and described spring to be positioned at described second recess, described moving contact is positioned at described second settling position.
3. contact rotating shaft system according to claim 2, it is characterized in that, 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 promotion described in the described spring in groove of stepping down wear axle and moved to described second recess by described first recess；The seamed edge on the top of described low sidewall can against and promote described spring to wear axle to be moved to described first recess by described second recess.
4. contact rotating shaft system according to claim 1, it is characterised in that
Described load axle is polygon shaft；
Described rotating shaft is also formed with the second locating slot towards the two opposite side walls of described cavity；
Described spring is torsion spring, and described spring is worn axle and through the hollow structure of described torsion spring and is installed in the second locating slot described in two, 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 is to the center of the active force described rotating shaft of traverse of described load axle, described moving contact is in scolds out critical localisation；When the torque that described rotating shaft is formed by described second torque arm by the active force of described load axle, make described moving contact and described rotating shaft laminating time, described moving contact is positioned at described first settling position；The torque that described rotating shaft formed by the active force of described load axle when described second torque arm, described moving contact being separated with described rotating shaft and stablizes when separation point position, described moving contact is positioned at described second settling position.
5. contact rotating shaft system according to claim 4, it is characterised in that described torsion spring is block form torsion spring.
6. contact rotating shaft system according to claim 4, it is characterised in that be additionally provided with guiding shoulder in described rotating shaft, 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, it is characterised in that described contact rotating shaft system also includes position limiting structure, described position limiting structure is for limiting the extreme position that described moving contact is scolded out.
8. contact rotating shaft system according to claim 2, it is characterised in that described spring is worn axle and is provided with two prerotation vanes, 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, it is characterised in that be provided with arc insulating cover on described moving contact.
10. a low tension switch, including contact rotating shaft system, it is characterised in that described contact rotating shaft system is the contact rotating shaft system according to any one of claim 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620115725.XU CN205376319U (en) | 2016-02-03 | 2016-02-03 | Contact pivot system and low tension switchgear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620115725.XU CN205376319U (en) | 2016-02-03 | 2016-02-03 | Contact pivot system and low tension switchgear |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205376319U true CN205376319U (en) | 2016-07-06 |
Family
ID=56263077
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620115725.XU Withdrawn - After Issue CN205376319U (en) | 2016-02-03 | 2016-02-03 | Contact pivot system and low tension switchgear |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205376319U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105551840A (en) * | 2016-02-03 | 2016-05-04 | 首瑞（天津）电气设备有限公司 | Contact rotation shaft system and low-voltage switch |
| CN109411247A (en) * | 2017-08-18 | 2019-03-01 | 日立电梯（中国）有限公司 | A kind of switch resilience-proof device |
-
2016
- 2016-02-03 CN CN201620115725.XU patent/CN205376319U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105551840A (en) * | 2016-02-03 | 2016-05-04 | 首瑞（天津）电气设备有限公司 | Contact rotation shaft system and low-voltage switch |
| 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 |
| 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 |
| CN109411247A (en) * | 2017-08-18 | 2019-03-01 | 日立电梯（中国）有限公司 | A kind of switch resilience-proof device |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160706 Effective date of abandoning: 20180821 |