CN201994250U - Phase-failure overload protection switch - Google Patents
Phase-failure overload protection switch Download PDFInfo
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- CN201994250U CN201994250U CN2011200427812U CN201120042781U CN201994250U CN 201994250 U CN201994250 U CN 201994250U CN 2011200427812 U CN2011200427812 U CN 2011200427812U CN 201120042781 U CN201120042781 U CN 201120042781U CN 201994250 U CN201994250 U CN 201994250U
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Abstract
The utility model provides a phase-failure overload protection switch. In the utility model, A base is mounted in a casing of the switch, and a panel covers the casing and penetrates a button I and a button II, input terminals and output terminals are mounted on the base which is matched with a bracket I in a sliding manner, and the base and the bracket I are pressed against a spring I; the bracket I is provided with movable contact pieces, and a movable contact at one end of each movable contact piece corresponds to a stationary contact of each input terminal; the bracket I is opposite to the inner end of the button II; the inner end of the button I is pressed against a spring II and matched with a positioning slide block through an inclined plane, one edge of the slide block is propped on the stepped side wall of the button II, and a spring III is pressed between the other edge of the slide block and the panel; the base is provided with a reset fixed bracket, and the fixed bracket and the panel are pressed against a spring IV; a reset slide block II is mounted in the fixed bracket, a spring V is pressed between the inner wall of the fixed bracket and the end part of the slide block II, convex points of the slide block II exactly face to bimetallic strips, and movable contacts on the bimetallic strips correspond to stationary contacts of the output terminals; the bimetallic strips are riveted with brackets II, stationary contacts on the brackets II correspond to movable contacts of the movable contact pieces, and the brackets II are positioned on the base; and the slide block II is matched with a reset slide block I through an inclined plane, and the slide block I exactly faces to the inner end of a reset button.
Description
Technical field
The utility model relates to the phase shortage overcurrent protection switch; its overcurrent protection that is primarily aimed at two-phase, three-phase alternating current and direct current machine designs; be applicable in 220V to 380V, 50Hz/60Hz, the occasion below the power 7.5KW and protect motor; can replace and improve the function of use of the starting switch of existing Machine Tool Electric Appliance; startup and protection applicable to all kinds of machine motors and electrical equipment are widely used in all kinds of machine motors and electric tool and pressing equipment.
Background technology
Present two-phase, three-phase starting switch only are used to start power supply, and do not have the defencive function of overcurrent protection and phase place phase shortage in starting switch.Other has a kind of two-phase, three-phase current overcurrent protection switch, only drives and close two knobs and a power supply indicator on its panel, switch bottom three the manual overload protective devices of packing into, and its shortcoming is: one, volume is big, wiring is complicated; Two, after current overload in the circuit disconnects to protective device; knob is arranged on switch inside because protector resets; after circuit overhauls; reclosing protector as need makes its recovery operate as normal then need whole switch is taken apart; sometimes also can allow the user think that this overload protection threephase switch is damaged by mistake; need to change switch parts etc., thereby bring very big inconvenience to the user.
Bimetal leaf has the characteristic that produces heat and be out of shape, and the utility model is applied to protection switch and overcomes above-mentioned defective.
Summary of the invention
Aforesaid drawbacks in view of the prior art existence, the utility model discloses a kind of phase shortage overcurrent protection switch, on overload protection two, the former installation dimension basis of invariable of threephase switch, through improving and innovation, its compact conformation, breaking capacity are strong, not only protected the fail safe and the practicality of motor effectively, and use and simple installation; After getting rid of, fault can reset rapidly, and easy and simple to handle.
The utility model is taked following technical scheme: the phase shortage overcurrent protection switch, comprise shell, panel, base, button one, button two, movable contact spring, input terminal, lead-out terminal, earth terminal, shell covers panel, panel stretch through movable button one (OFF), button two (ON), the panel movable reset button that also stretches through; Dress base in the shell, base two edges are adorned input terminal and lead-out terminal respectively, and the inner of input terminal, lead-out terminal respectively has fixed contact, and shell is stretched out in the outer end; The base support one that is slidingly matched, top pressure spring one between support one bottom and base; Support one is equipped with movable contact spring, and the movable contact spring two ends are moving contacts, and the first end moving contact is corresponding with the input terminal fixed contact; Support one top is inner corresponding with button two; The inner top pressure spring two of button one, and by inclined-plane cooperation positioning sliding block, an edge of positioning sliding block peaks at a sidewall of button two, this sidewall forms step, top pressure spring three between another side edge and panel; The fixed mount that resets is installed on base top, and top pressure spring four between fixed mount and panel resets; The dress movable type that resets in the fixed mount slide block two that resets, reset fixed mount inwall and the top pressure spring five between slide block two ends that resets, the slide block two formation salient points that reset over against bimetal leaf, have moving contact, the fixed contact of corresponding lead-out terminal on the bimetal leaf; Bimetal leaf riveted joint support two, support two has fixed contact, the second end moving contact of corresponding movable contact spring, support two is positioned on the base; Slide block two tops that reset cooperate the slide block one that resets by the inclined-plane, and the inner over against reset button, slide block one top resets.
Described phase shortage overcurrent protection switch, support one has through hole, inserts described movable contact spring in the through hole, and the top top pressure spring six of movable contact spring, the other end of spring six peak at the through hole roof of support one.
Described phase shortage overcurrent protection switch, the reset slide block one and the slide block two that resets form suitable slope, and two slide blocks that reset cooperate by sliding inserted type.
Described phase shortage overcurrent protection switch, the end of the slide block two that resets has cylindrical hole, the fixed mount inner circular that the resets shell of column slidingtype cylindrical hole of slide block two and the described spring five of cylindrical section overcoat of resetting of pegging graft.
Described phase shortage overcurrent protection switch, two slopes are separately formed at the top of the slide block two that resets, and are corresponding, and two slopes are formed at slide block one bottom that resets, and the slide block that resets cooperates by sliding inserted type with the slide block that resets.
Described phase shortage overcurrent protection switch, the inwall opposite side of shell respectively forms vertical convex tendon, and is corresponding, and the outer wall of base forms vertical groove, and both are by aforementioned concavo-convex cooperation.
Described phase shortage overcurrent protection switch, button one the inner is cylindrical section, and forms the slope; Positioning sliding block has the hole, and an edge in hole forms the slope, and this slope is corresponding with the slope of button one.
Described phase shortage overcurrent protection switch, base forms and the corresponding passage of input terminal, the outermost layer wall upper edge of base vertically respectively has one slide opening, described support one is slidingly matched between the slide opening of both sides, form a projection on support one and the corresponding outer wall of aforementioned slide opening, this projection and aforementioned slide opening are suitable and can slide up and down along slide opening; The both sides, middle part of support one are to evagination, and the width of this protuberance is corresponding with the passage of described base.
Described phase shortage overcurrent protection switch, positioning sliding block forms projection, the described spring three of protruding overcoat, the other end of spring three peaks at a spring screens, and switch panel is fixed in the spring screens.
Described phase shortage overcurrent protection switch, switch are three-phase current overcurrent protection switch or two-phase current overcurrent protection switch.
The utility model has utilized the principle of thermo bimetal's characteristic, and when current overload in the circuit during greater than the rated current certain proportion, bimetal leaf is out of shape because of producing heat, and the protection circuit in the protective device can corresponding disconnection, thereby cuts off circuit; After external circuit recovers normally, reset knob with circuit conducting again by protector, the starting switch knob makes circuit recover operate as normal.
The utility model has carried out technological improvement and innovation on original starting switch installation dimension basis of invariable; provide a kind of structure simple and clear, compact; help a kind of current overload protection protection unit of operating and judging; major function has: two-phase, three-phase current overload protection arrangement not only can be when current overload surpasses rated current automatic shutdown circuit; and can also realize independent startup and switch; having improved motor fail safe and practicality in use effectively, is the phase shortage overcurrent protection switch of a kind of uniqueness, novelty.The utility model construction of switch is simple, safe, breaking capacity strong, stable performance, makes the use safety and reliability of electrical equipment.
Description of drawings
Fig. 1 is a phase shortage overcurrent protection switch appearance structure schematic diagram.
Fig. 2 is the appearance structure schematic diagram of phase shortage overcurrent protection switch other direction.
Fig. 3 is phase shortage overcurrent protection switch STRUCTURE DECOMPOSITION figure.
Fig. 4 is the partial structurtes stereogram under the phase shortage overcurrent protection switch overload conducting state.
Fig. 5 is the partial structurtes stereogram under the phase shortage overcurrent protection switch overload off-state.
Fig. 6 is the shape assumption diagram under the phase shortage overcurrent protection switch closed condition.
Fig. 7 is the shape assumption diagram under the phase shortage overcurrent protection switch opening.
Fig. 8 is the sectional structure chart under the phase shortage overcurrent protection switch closed condition.
Fig. 9 is the sectional structure chart under the phase shortage overcurrent protection switch opening.
Figure 10 is the partial structurtes stereogram under the phase shortage overcurrent protection switch closed condition.
Figure 11 is the partial structurtes stereogram under the phase shortage overcurrent protection switch opening.
Embodiment
Further specify below in conjunction with accompanying drawing.
Shown in Fig. 1-11, each parts of dress in the shell 57, it has bottom 57-1, and top has an opening, and its upper cap is run jointly and is closed panel 7, and shell 57 cooperates by projection and shrinkage pool with switch panel 7, and connects by nut.Have two inward recess on the switch panel 7, be used to stretch through movable shift knob (OFF) 1 and a shift knob (ON) 2, another movable reset button 4 that is used to stretch through.
One side of switch pedestal 56 is along forming three square breach 56-2, and three indentation, there are equipped with input terminal 37,38,39 respectively, and the inner of input terminal 37,38,39 has fixed contact 36,35,34 respectively, and then stretch out downwards outside the bottom of shell 57 outer end.
The inner middle part of shift knob (OFF) 1 forms a cylindrical section 1-1, and the inner fovea part of shift knob 1 is passed in the inner of cylindrical section, cylindrical section overcoat button spring 3, and the other end of spring 3 peaks on the wall of switch panel 7 inner fovea parts.
Cylindrical section the inner of shift knob 1 also forms ramped shaped 1-2, and the ramp of shift knob 1 cooperates a transversely movable positioning sliding block 9, and positioning sliding block 9 middle parts have hole 9-1, and the edge of hole 9-1 is ramped shaped, this ramp and shift knob 1
Ramp 1-2 is corresponding.With the edge of the ramp opposite side of positioning sliding block 9 over against a sidewall of shift knob 2, it is one step-like that this sidewall of shift knob 2 is, when shift knob 2 was not pressed, positioning sliding block 9 peaked at this sidewall hypomere of shift knob 2; And when shift knob 2 was pressed, 9 of positioning sliding blocks peaked at this sidewall epimere of shift knob 2, blocked mutually with this stage portion simultaneously, made shift knob 2 travelling backwards that can't make progress, and switch is in opening.Another sidewall of positioning sliding block 9 is that the opposing sidewalls middle part outwards forms protruding 9-2, protruding 9-2 outer casing spring 8, and the other end of spring 8 peaks at spring screens 16, and switch panel 7 is fixed in spring screens 16.
With also form three breach on the switch pedestal 56 that input terminal relative edge edge is installed, each breach is respectively charged into lead-out terminal 18,20,22, stretch out outside the bottom of shell 57 outer end of lead-out terminal 18,20,22.The inner of lead-out terminal 18,20,22 is connected to lead-out terminal fixed contact 17,19,21 respectively.This upper lateral part of switch pedestal 56 has two projection 56-4 and two shrinkage pool 56-5, correspondingly, the fixed mount 53 that resets forms two location hole 53-1, reference column 53-2, reference column 53-2 is in the bottom of the fixed mount 53 that resets, and switch pedestal 56 and the fixed mount 53 that resets are by aforementioned concavo-convex the cooperation.Four projection 53-3 are also formed at the reset top of fixed mount 53, and corresponding, four location holes are formed at fixed mount 52 bottoms that reset, between the two by aforementioned concavo-convex cooperation.Fixed mount 52 tops that reset have two root post 52-1, and two columns are outer casing spring 5,6 respectively, and the other end of spring 5,6 peaks at switch panel 7 the corresponding inwall in reset button 4 places is installed.
Reset and adorn the transversely movable slide block 32 that resets in the fixed mount 52, the reset end of slide block 32 has cylindrical hole 32-1, peg graft with the inner circular shell of column slidingtype of the fixed mount 52 that resets respectively, and cylindrical section outer casing spring 23, spring 23 two ends peak at reset fixed mount 52 inwalls and slide block 32 ends that reset respectively.Three salient point 32-2 are formed at the reset bottom of slide block 32, correspond respectively to bimetal leaf 10,12,14, bimetal leaf 10,12,14 stretches out outside the fixed mount 52 that resets, and the moving contact 11,13,15 on the bimetal leaf 10,12,14 corresponds respectively to lead-out terminal fixed contact 17,19,21.Under the normality, the moving contact 11,13,15 on the bimetal leaf 10,12,14 touches mutually with lead-out terminal fixed contact 17,19,21 respectively.And after switch produced the protection action, aforementioned input endpoint moving contact and lead-out terminal fixed contact just were separated.Two slope 32-3 are separately formed at the reset top of slide block 32, and corresponding, two slope 31-1 and grafting slit are formed at slide block 31 bottoms that reset, and the slide block 32 that resets cooperates by sliding inserted type with the slide block 31 of resetting.The top 31-2 of slide block 31 of resetting stretches out outside the fixed mount 52 that resets, and over against the inner of reset button 4.Under the active force of reset button 4, the slide block 31 that resets moves downward, because the effect on slope moves laterally the slide block 32 that resets, thereby the fixed contact of the salient point of slide block 32 bottoms that reset on can the roof pressure bimetal leaf makes it touch mutually with the fixed contact of lead-out terminal.
Earth terminal 30 is connected on the shell 57.
When switch knob (ON) 2 press put in place after, positioning sliding block 9 blocks mutually with its stage portion under the effect of positioning sliding block spring 8 and is located, make moving contact 43 and moving contact 44 on the movable contact spring 45, moving contact 46 on the movable contact spring 48 and moving contact 47, moving contact 49 on the movable contact spring 51 and moving contact 50 respectively with input terminal 37 on fixed contact 34, fixed contact 35 on the input terminal 38, fixed contact 36 on the input terminal 39 and the fixed contact 27 on the bimetal leaf fixed support 24, the fixed contact 28 of bimetal leaf fixed support 25, the fixed contact 29 of bimetal leaf fixed support 26 touches mutually, and switch is in conducting state; When pressing switch knob (OFF) 1, it will promote positioning sliding block 9 travelling backwards and compression set sliding block spring 8, switch knob (ON) 2 just loses resistance, under the effect of movable contact spring stand spring 54,55, aforesaid moving contact and fixed contact all are separated, and returning back to initial condition, switch is in off-state.
Switch is under the conducting state; in circuit, pass through thrermostatic bimetal-plate 43; thrermostatic bimetal-plate 44; when the electric current of any circuit surpasses rated current in 45 3 circuit of thrermostatic bimetal-plate; corresponding thermo bimetal's sector-meeting short time set that is heated; make lead-out terminal fixed contact 17 and bimetal leaf fixed contact 11; lead-out terminal fixed contact 19 and bimetal leaf fixed contact 13; separate accordingly by moment with bimetal leaf fixed contact 15 for lead-out terminal fixed contact 21; cut off circuit; and keep corresponding lead-out terminal fixed contact and bimetal leaf moving contact released state, thereby play the purpose of protection motor safety.After fixing a breakdown, manually push reset button 4, the reset button 4 roof pressures slide block 31 that resets, reset slide block 31 again by ramp pressed home slide block 32, the slide block 32 that resets is moved laterally, in this process, its salient point can push corresponding moving contact on the bimetal leaf 10,12,14, and lead-out terminal fixed contact 17 is touched mutually with bimetal leaf fixed contact 11, lead-out terminal fixed contact 19 and bimetal leaf fixed contact 13, lead-out terminal fixed contact 21 and bimetal leaf fixed contact 15.When pressing shift knob 2 once more, switch just is in conducting state, thereby reaches the effect of repetition protective device.Reset button 4 resets under spring 5,6 effects, and the slide block 31,32 that resets resets under the effect of spring 23.
Above-mentioned is that the overcurrent protection switch can be applicable to two-phase or three-phase current protection.
More than preferred implementation of the present utility model is had been described in detail; those of ordinary skill in the art will be appreciated that; the thought that provides according to the utility model; the part that all can change on concrete execution mode of the utility model and range of application, these changes also should be considered as protection range of the present utility model.
Claims (10)
1. phase shortage overcurrent protection switch, comprise shell, panel, base, button one, button two, movable contact spring, input terminal, lead-out terminal, shell covers panel, and panel stretch through movable button one, button two is characterized in that: the panel movable reset button that also stretches through; Dress base in the shell, base two edges are adorned input terminal and lead-out terminal respectively, and the inner of input terminal, lead-out terminal respectively has fixed contact, and shell is stretched out in the outer end;
The base support one that is slidingly matched, top pressure spring one between support one bottom and base; Support one is equipped with movable contact spring, and the movable contact spring two ends are moving contacts, and the first end moving contact is corresponding with the input terminal fixed contact; Support one top is inner corresponding with button two;
The inner top pressure spring two of button one, and by inclined-plane cooperation positioning sliding block, an edge of positioning sliding block peaks at a sidewall of button two, this sidewall forms step, top pressure spring three between another side edge and panel; The fixed mount that resets is installed on base top, and top pressure spring four between fixed mount and panel resets;
The dress movable type that resets in the fixed mount slide block two that resets, reset fixed mount inwall and the top pressure spring five between slide block two ends that resets, the slide block two formation salient points that reset over against bimetal leaf, have moving contact, the fixed contact of corresponding lead-out terminal on the bimetal leaf; Bimetal leaf riveted joint support two, support two has fixed contact, the second end moving contact of corresponding movable contact spring, support two is positioned on the base; Slide block two tops that reset cooperate the slide block one that resets by the inclined-plane, and the inner over against reset button, slide block one top resets.
2. phase shortage overcurrent protection switch as claimed in claim 1 is characterized in that: described support one has through hole, inserts described movable contact spring in the through hole, and the top top pressure spring six of movable contact spring, the other end of spring six peak at the through hole roof of support one.
3. phase shortage overcurrent protection switch as claimed in claim 1 is characterized in that: described slide block one and the slide block two that resets of resetting forms suitable slope, and two slide blocks that reset cooperate by sliding inserted type.
4. as claim 1 or 3 described phase shortage overcurrent protection switch, it is characterized in that: the described end that resets slide block two has cylindrical hole, the fixed mount inner circular that the resets shell of column slidingtype cylindrical hole of slide block two and the described spring five of cylindrical section overcoat of resetting of pegging graft.
5. as claim 1 or 3 described phase shortage overcurrent protection switch; it is characterized in that: two slopes are separately formed at the top of the described slide block two that resets; corresponding, two slopes are formed at slide block one bottom that resets, and the slide block that resets cooperates by sliding inserted type with the slide block that resets.
6. phase shortage overcurrent protection switch as claimed in claim 1 is characterized in that: the inwall opposite side of described shell respectively forms vertical convex tendon, and is corresponding, and the outer wall of base forms vertical groove, and both are by aforementioned concavo-convex cooperation.
7. phase shortage overcurrent protection switch as claimed in claim 1 is characterized in that: described button one the inner is cylindrical section, and forms the slope; Positioning sliding block has the hole, and an edge in hole forms the slope, and this slope is corresponding with the slope of button one.
8. phase shortage overcurrent protection switch as claimed in claim 1, it is characterized in that: described base forms and the corresponding passage of input terminal, the outermost layer wall upper edge of base vertically respectively has one slide opening, described support one is slidingly matched between the slide opening of both sides, form a projection on support one and the corresponding outer wall of aforementioned slide opening, this projection and aforementioned slide opening are suitable and can slide up and down along slide opening; The both sides, middle part of support one are to evagination, and the width of this protuberance is corresponding with the passage of described base.
9. phase shortage overcurrent protection switch as claimed in claim 1 is characterized in that: described positioning sliding block forms projection, the described spring three of protruding overcoat, and the other end of spring three peaks at a spring screens, and switch panel is fixed in the spring screens.
10. as claim 1-3 or each described phase shortage overcurrent protection switch of 6-9, it is characterized in that: described switch is three-phase current overcurrent protection switch or two-phase current overcurrent protection switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200427812U CN201994250U (en) | 2011-02-21 | 2011-02-21 | Phase-failure overload protection switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200427812U CN201994250U (en) | 2011-02-21 | 2011-02-21 | Phase-failure overload protection switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201994250U true CN201994250U (en) | 2011-09-28 |
Family
ID=44670730
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200427812U Expired - Fee Related CN201994250U (en) | 2011-02-21 | 2011-02-21 | Phase-failure overload protection switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201994250U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104269302A (en) * | 2014-09-26 | 2015-01-07 | 成都锐奕信息技术有限公司 | Control structure capable of improving operating safety |
| CN104836207A (en) * | 2015-05-15 | 2015-08-12 | 宁波市士鑫电器有限公司 | Phase loss protection switch of three-phase motor |
-
2011
- 2011-02-21 CN CN2011200427812U patent/CN201994250U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104269302A (en) * | 2014-09-26 | 2015-01-07 | 成都锐奕信息技术有限公司 | Control structure capable of improving operating safety |
| CN104836207A (en) * | 2015-05-15 | 2015-08-12 | 宁波市士鑫电器有限公司 | Phase loss protection switch of three-phase motor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110928 Termination date: 20150221 |
|
| EXPY | Termination of patent right or utility model |