CN205092200U - Low -voltage circuit breaker - Google Patents
Low -voltage circuit breaker Download PDFInfo
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- CN205092200U CN205092200U CN201520827371.7U CN201520827371U CN205092200U CN 205092200 U CN205092200 U CN 205092200U CN 201520827371 U CN201520827371 U CN 201520827371U CN 205092200 U CN205092200 U CN 205092200U
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Abstract
The utility model provides a low -voltage circuit breaker, belongs to the low -voltage electrical equipment field. Including sound contact, operating device, release and shell, operating device includes handle components, elbow link pole, main spring, pivot, jump knot, hasp, traction lever and mechanism bracket, handle components includes lever and handle, and handle components clamps on mechanism bracket to block point rotates the swing for handle components centre of turning circle, and block point lies in pivot centre of turning circle's top, characteristics: establish the first contact locking cooperation structure that is different from handle components centre of turning circle between handle components and the pivot, fuse when connecting the sound contact, and first contact locking cooperation structural formation first make contact prevents handle components to dividing disconnected position to rotate, establish second contact locking cooperation structure between handle components and the shell, prevent handle components to continue around first make contact to dividing disconnected position to rotate. Prevent to guarantee operation safety, simple structure, simple to operate because breaker handle's mistake is instructed and is caused the emergence of electric shock accidents.
Description
Technical field
The utility model belongs to low voltage electrical apparatus technology field, is specifically related to a kind of low-voltage circuit breaker, particularly a kind of low-pressure plastic shell circuit breaker with isolation features.
Background technology
Breaker of plastic casing is by the joint weldment to the manipulation realizing circuit of switch handle device.When circuit breaker is as isolation appliance applications, need handle to be pushed into disjunction indicating positions, for showing that circuit breaker is in isolation.Be in the circuit breaker of on-state in circuit, if occur abnormal, as contact melting welding fault etc., then handle can be forbidden to be pushed into disjunction position; In addition, if transmission mechanism breaks down, even if then handle arrives disjunction position and do not meet the required electric clearance parameter request of isolation features between fracture, be not also allowed to.Under above-mentioned fault condition, if handle is pushed into disjunction position, then can misleads operating personnel and think that circuit disconnects, and be safe, think and can carry out maintenance activity, but side circuit dangerous, be so just easy to cause electric shock accidents.Therefore, in order to ensure the personal safety of operation maintenance personal, improving circuit safety, designing and a kind ofly can guarantee that the circuit breaker of isolation features safety is necessary.
In view of above-mentioned prior art, be necessary the structure rational modification in addition to existing low-voltage circuit breaker.For this reason, the applicant has done useful design, and technical scheme described below produces under this background.
Summary of the invention
The purpose of this utility model is to provide a kind of low-voltage circuit breaker, has processing safety high, effectively can prevent the generation causing personnel's electric shock accidents in the operation process such as maintenance, maintenance due to the mistake instruction of moulded case circuit breaker handle.
The purpose of this utility model reaches like this, a kind of low-voltage circuit breaker, comprise cooperatively interact for a pair moving contact, fixed contact, act on moving contact connect with realizing circuit and breaking operation operating mechanism, for the release of realizing circuit abnormal protection and the shell for holding said apparatus; Described operating mechanism comprises Handleset, elbow knot connecting rod, main spring, rotating shaft, tripping, snap close, the draw bar linked with release and the mechanism rack for supporting above-mentioned component; Described Handleset comprises lever and handle, and described Handleset is installed on mechanism rack, and be that the Handleset centre of gyration carries out rotary oscillation with block chalaza, described block chalaza is positioned at the top of the rotating shaft centre of gyration; Described main spring is used for providing operating energy, and its one end is hung on lever, and the other end is hung on elbow knot rod hinge connection axle; Described rotating shaft is for installing moving contact, the touch spring for providing closing force between dynamic/static contact is provided with between moving contact and rotating shaft, it is characterized in that: described Handleset is different from first of the Handleset centre of gyration and contacts stop fit structure with being provided with between rotating shaft, when the fusion of the sound contact of dynamic/static contact connects, this the first contact stop fit structure forms first make contact, rotates to disjunction position for stoping Handleset; Also being provided with second between Handleset with shell and contacting stop fit structure, continuing for stoping Handleset to rotate to disjunction position around first make contact.
In a specific embodiment of the present utility model, the first described contact stop fit structure is made up of tiller effect end and rotating shaft counter stopper, described tiller effect end and sound contact lay respectively at the both sides of the Handleset centre of gyration, and described rotating shaft backstop and sound contact lay respectively at the both sides of the rotating shaft centre of gyration.
In another specific embodiment of the present utility model, described second contact stop fit structure to be coordinated with the cavity volume inwall of outer casing upper cover formed by the circular arc of the handle lateral wall of slide wall that leads.
In another specific embodiment of the present utility model, the cavity volume inwall of described outer casing upper cover is circular arc, and be isocentric circular arc with the circular arc of the handle slide wall that leads, the cavity volume inwall of outer casing upper cover and the circular arc of handle lead slide wall lateral wall between gap be no more than 0.5mm.
In another specific embodiment of the present utility model, described lever is provided with places restrictions on end, described shell is being provided with confined planes corresponding to this position of placing restrictions on end, described confined planes with place restrictions on end and match, second described in formation contacts stop fit structure.
The utility model is owing to have employed said structure, compared with prior art, the beneficial effect had is: after fusion connection occurs in sound contact, by Handleset and the first contact action of rotating shaft and the second contact action of Handleset and shell, realize the locking to handle breaking operation, thus stop handle to arrive open position, effectively prevent due to the mistake instruction of moulded case circuit breaker handle and cause maintenance, the generation of personnel's electric shock accidents in the operation process such as maintenance, ensure that the processing safety of the electrical equipment with isolation features, and, overall structure is simple, easy for installation.
Accompanying drawing explanation
Fig. 1 is the structural representation of the first embodiment of the present utility model.
Fig. 2 is the first contact stop matching chart of the first embodiment described in the utility model.
Fig. 3 is the second contact stop matching chart of the first embodiment described in the utility model.
Fig. 4 is the decomposing schematic representation of operating mechanism described in the utility model.
Fig. 5 is the second embodiment schematic diagram of the present utility model.
Fig. 6 is the second contact stop matching chart of the second embodiment described in the utility model.
In figure: 11. moving contacts, 111. sound are touched, 12. fixed contacts, 121. fixed contacts; 2. on operating mechanism, 20. elbow knot connecting rods, 200. elbow knot rod hinge connection axles, 201., connecting rod, 202. lower links, 21. main springs, 22. rotating shafts, 221. rotating shaft backstops, 23. trippings, 24. snap closes, 25. draw bars, 26. mechanism racks, 261. clamping spindle noses, 27. levers, 271. draw-in grooves, 272. tiller effect ends, 273. place restrictions on end, 28. handles, 281. circular arc guiding slide walls; 3. shell, 31. cavity volume inwalls, 32. confined planes; P. interference point; The 01. Handleset centre of gyration, 02. first make contact, the 03. rotating shaft centre of gyration, 04. pin joint.
Embodiment
Applicant will describe in detail embodiment of the present utility model below by reference to the accompanying drawings; but applicant is not the restriction to technical scheme to the description of embodiment, any changing in the form rather than substance according to the utility model design all should be considered as protection range of the present utility model.
Refer to Fig. 1 and Fig. 4; the utility model relates to a kind of low-voltage circuit breaker; be specially a kind of low-pressure plastic shell circuit breaker with isolation features; comprising moving contact 11, fixed contact 12 that electric parameter under a pair off-state meets insulation request, acting on operating mechanism 2 that moving contact 11 operates with realizing circuit joint weldment, for the release (not shown) of realizing circuit abnormal protection and the shell 3 for holding said apparatus.Described operating mechanism 2 comprises Handleset, elbow knot connecting rod 20, main spring 21, rotating shaft 22, tripping 23, snap close 24, the draw bar 25 linked with release and the mechanism rack 26 for supporting above-mentioned component.Described Handleset comprises lever 27 and handle 28, and handle 28 is fixed on lever 27, and lever 27 is symmetrically provided with a pair draw-in groove 271 in bottom.Described mechanism rack 26 is provided with clamping spindle nose 261, Handleset is installed on mechanism rack 26 by the cooperation of draw-in groove 271 and clamping spindle nose 261, Handleset is that Handleset centre of gyration O1 carries out rotary oscillation with block chalaza, and described block chalaza is positioned at the top of rotating shaft centre of gyration O3.Described elbow knot connecting rod 20 comprises the upper connecting rod 201 and lower link 202 that are hinged by elbow knot rod hinge connection axle 200.The upper end that connecting rod 201 go up in the upper end of elbow knot connecting rod 20 is namely hinged with tripping 23, and elbow ties the lower end of connecting rod 20 and the lower end of lower link 202 is hinged in rotating shaft 22, and the pin joint of lower link 202 and rotating shaft 22 is O4.Described main spring 21 is for providing operating energy, and its one end is hung on the top of lever 27, and the other end is hung on elbow knot rod hinge connection axle 200.Described rotating shaft 22, for installing moving contact 11, is provided with the touch spring for providing closing force between dynamic/static contact 11,12 between moving contact 11 and rotating shaft 22.Described tripping 23, snap close 24 and draw bar 25 are hinged on mechanism rack 26 respectively.
When circuit breaker normally closes a floodgate, snap close 24 and draw bar 25 hasp, tripping 23 and snap close 24 hasp, upper connecting rod 201, lower link 202 and rotating shaft 22 form stable quadric chain.Driving handle 28, upper connecting rod 201 rotates under the pulling force effect of main spring 21, drives lower link 202 action, thus drive rotating shaft 22 around the shaft centre of gyration O3 rotate, sound contact 111,121 is separated thus, finally arrives gate-dividing state, and handle 28 points to open position.Under the "on" position of circuit breaker, if the circuit at circuit breaker place is short-circuited or overload fault, then release can promote draw bar 25 and rotates, the hasp removed between its with snap close 24 is connected, snap close 24 rotates to discharge the constraint of its hasp to tripping 23, now under the effect of main spring 21, tripping 23 can be backed down by upper connecting rod 201, the stable state of mechanism is broken, become by tripping 23, upper connecting rod 201, the five-bar mechanism that lower link 202 and rotating shaft 22 are formed, this five-bar mechanism drive rotating shaft 22 around the shaft centre of gyration O3 is rotated, final arrival trip status, handle 28 points to trip positions, this position is positioned at the zone line closed a floodgate with separating brake indicating positions.
Embodiment 1:
Refer to Fig. 1, Fig. 2 and Fig. 3, be provided with between described Handleset with rotating shaft 22 and be different from first of Handleset centre of gyration O1 and contact stop fit structure, when fusing connection in sound contact 111,121, this the first contact stop fit structure is had an effect and is formed first make contact O2, rotates around Handleset centre of gyration O1 for stoping Handleset to disjunction position; Also being provided with second between Handleset with shell 3 and contacting stop fit structure, continuing for stoping Handleset to rotate to disjunction position around first make contact O2.Concrete, described first contact stop fit structure to be coordinated with rotating shaft backstop 221 by tiller effect end 272 and forms, described tiller effect end 272 and sound contact 111,121 lay respectively at the both sides of Handleset centre of gyration O1, and described rotating shaft backstop 221 and sound contact 111,121 lay respectively at the both sides of rotating shaft centre of gyration O3.Driven fixed contact 111,121 is seen towards the direction of draw bar 25, and the pin joint O4 of lower link 202 and rotating shaft 22, Handleset centre of gyration O1, rotating shaft centre of gyration O3 and first make contact O2 arrange successively.Described second contact stop fit structure to be coordinated with the cavity volume inwall 31 of shell 3 upper cover formed by the lead lateral wall of slide wall 281 of the circular arc of handle 28.Preferably, the cavity volume inwall of shell 3 upper cover 31 in circular arc, and is isocentric circular arc with the circular arc of handle 28 slide wall 281 that lead, and the lead gap of lateral wall of slide wall 281 of the cavity volume inwall 31 of shell 3 upper cover and the circular arc of handle 28 is no more than 0.5mm.
Please continue to refer to Fig. 1, when circuit breaker normally works in the line, the Handleset centre of gyration is O1, tiller effect end 272 and rotating shaft backstop 221 do not interfere effect between the two, the circular arc guiding lateral wall of slide wall 281 of handle 28 and the cavity volume inwall 31 of shell 3 upper cover also do not interfere effect between the two, solid line as shown in Figure 3 represents the movement locus of cavity volume inwall 31 and circular arc guiding slide wall 281 respectively, now can realize the normal combined floodgate to breaker of plastic casing, separating brake, dropout, detain reset operation again.
When there is moving contact 111, fixed contact 121 fusion connection fault, moving contact 11 and rotating shaft 22 remain on closing position and are failure to actuate, and driving handle assembly rotates to open position around Handleset centre of gyration O1, and this rotation is defined as the first disconnection campaign.Then, between Handleset with rotating shaft 22 first contacts stop fit structure and has an effect, form first make contact O2, because tiller 27 and mechanism rack 26 are snap-fit, under certain stress condition, draw-in groove 271 can depart from clamping spindle nose 261, and make the block chalaza of lever 27 releasing mechanism support 26 and continue around the new center of circle and first make contact O2 to rotate to open position, this rotation is defined as the second disconnection campaign.Illustrate please continue to refer to the dotted line in Fig. 3, figure the running orbit that Handleset is the center of circle with first make contact O2, the interference point of the cavity volume inwall 31 of this track and shell 3 upper cover is set to P.By designing one based on the fit structure becoming track cross principle after fulcrum between shell 3 and Handleset, the spacing locking disconnecting motion to described second can be realized, thus handle 28 can be stoped to arrive open position, avoid instruction by mistake.It is pointed out that gap between circular arc guiding slide wall 281 and cavity volume inwall 31 is preferably no more than 0.5mm, avoids excesssive gap to cause and declines to the second spacing locking effect disconnecting motion, cause handle to indicate unintelligible.
Embodiment 2:
Refer to Fig. 5 and Fig. 6, described lever 27 is provided with places restrictions on end 273, and described shell 3 is being provided with confined planes 32 corresponding to this position of placing restrictions on end 273, described confined planes 32 with place restrictions on end 273 and match, second described in formation contacts stop fit structure.When circuit breaker normally works in the line, the Handleset centre of gyration is O1, tiller effect end 272 and rotating shaft backstop 221 do not interfere effect between the two, place restrictions on end 273 and also do not interfere effect between the two with confined planes 32, now can realize the normal combined floodgate to breaker of plastic casing, separating brake, dropout, detain reset operation again.
Please continue to refer to Fig. 5, when there is sound contact 111,121 and fusing connection fault, moving contact 11 and rotating shaft 22 remain on closing position and are failure to actuate, and driving handle assembly rotates to open position around Handleset centre of gyration O1, and this rotation is defined as the first disconnection campaign.Then, between Handleset with rotating shaft 22 first contacts stop fit structure and has an effect, form first make contact O2, because tiller 27 and mechanism rack 26 are snap-fit, under certain stress condition, draw-in groove 271 can depart from clamping spindle nose 261, and make the block chalaza of lever 27 releasing mechanism support 26 and continue around the new center of circle and first make contact O2 to rotate to open position, this rotation is defined as the second disconnection campaign.In this second disconnection motion process, place restrictions on end 273 and interfere with confined planes 32, realize the spacing locking disconnecting motion to second, thus handle 28 can be stoped to arrive open position, avoid indicating by mistake.
Claims (5)
1.
a kind of low-voltage circuit breaker, comprise cooperatively interact for a pair moving contact (11), fixed contact (12), act on moving contact (11) connect with realizing circuit and breaking operation operating mechanism (2), for the release of realizing circuit abnormal protection and shell (3), described shell (3) is for holding moving contact (11), fixed contact (12), operating mechanism (2) and release, described operating mechanism (2) comprises Handleset, elbow knot connecting rod (20), main spring (21), rotating shaft (22), tripping (23), snap close (24), the draw bar (25) link with release and mechanism rack (26), and described mechanism rack (26) ties connecting rod (20), main spring (21), rotating shaft (22), tripping (23), snap close (24) and draw bar (25) for support handle assembly, elbow, described Handleset comprises lever (27) and handle (28), described Handleset is installed on mechanism rack (26), be that Handleset centre of gyration O1 carries out rotary oscillation with block chalaza, described block chalaza is positioned at the top of rotating shaft centre of gyration O3, described main spring (21) is for providing operating energy, and its one end is hung on lever (27), and the other end is hung on elbow knot rod hinge connection axle (200), described rotating shaft (22) is for installing moving contact (11), be provided with between moving contact (11) and rotating shaft (22) for providing dynamic/static contact (11, 12) touch spring of closing force between, it is characterized in that: be provided with between described Handleset with rotating shaft (22) and be different from first of Handleset centre of gyration O1 and contact stop fit structure, at dynamic/static contact (11, 12) sound contact (111, 121) when fusion connects, this the first contact stop fit structure forms first make contact O2, rotate to disjunction position for stoping Handleset, also being provided with second between Handleset with shell (3) and contacting stop fit structure, continuing for stoping Handleset to rotate to disjunction position around first make contact O2.
2.
a kind of low-voltage circuit breaker according to claim 1, it is characterized in that described first contact stop fit structure to be coordinated with rotating shaft backstop (221) by tiller effect end (272) to form, described tiller effect end (272) and sound contact (111,121) lay respectively at the both sides of Handleset centre of gyration O1, and described rotating shaft backstop (221) and sound contact (111,121) lay respectively at the both sides of rotating shaft centre of gyration O3.
3.
a kind of low-voltage circuit breaker according to claim 1, is characterized in that the lateral wall of the second described contact stop fit structure by circular arc guiding slide wall (281) of handle (28) coordinates with the cavity volume inwall (31) of shell (3) upper cover and forms.
4.
a kind of low-voltage circuit breaker according to claim 3, it is characterized in that the cavity volume inwall (31) of described shell (3) upper cover is in circular arc, and be isocentric circular arc with the circular arc of handle (28) slide wall (281) that leads, the cavity volume inwall (31) of shell (3) upper cover and the circular arc of handle (28) lead slide wall (281) lateral wall between gap be no more than 0.5mm.
5.
a kind of low-voltage circuit breaker according to claim 1, it is characterized in that described lever (27) is provided with and place restrictions on end (273), described shell (3) is being provided with confined planes (32) corresponding to this position of placing restrictions on end (273), described confined planes (32) holds (273) to match with placing restrictions on, the second contact stop fit structure described in formation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520827371.7U CN205092200U (en) | 2015-10-23 | 2015-10-23 | Low -voltage circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520827371.7U CN205092200U (en) | 2015-10-23 | 2015-10-23 | Low -voltage circuit breaker |
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| Publication Number | Publication Date |
|---|---|
| CN205092200U true CN205092200U (en) | 2016-03-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520827371.7U Active CN205092200U (en) | 2015-10-23 | 2015-10-23 | Low -voltage circuit breaker |
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| CN (1) | CN205092200U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107658192A (en) * | 2016-07-25 | 2018-02-02 | 江苏宏达电气有限公司 | A kind of detachable rotating operation handle of breaker |
| CN111128618A (en) * | 2020-01-10 | 2020-05-08 | 常熟开关制造有限公司(原常熟开关厂） | Operating mechanism of low-voltage molded case circuit breaker |
| CN112053909A (en) * | 2019-06-05 | 2020-12-08 | 施耐德电器工业公司 | Short-circuit fault indicating mechanism and circuit breaker comprising same |
| WO2022206904A1 (en) * | 2021-04-01 | 2022-10-06 | 上海正泰智能科技有限公司 | Quick tripping device and circuit breaker |
-
2015
- 2015-10-23 CN CN201520827371.7U patent/CN205092200U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107658192A (en) * | 2016-07-25 | 2018-02-02 | 江苏宏达电气有限公司 | A kind of detachable rotating operation handle of breaker |
| CN112053909A (en) * | 2019-06-05 | 2020-12-08 | 施耐德电器工业公司 | Short-circuit fault indicating mechanism and circuit breaker comprising same |
| CN111128618A (en) * | 2020-01-10 | 2020-05-08 | 常熟开关制造有限公司(原常熟开关厂） | Operating mechanism of low-voltage molded case circuit breaker |
| WO2022206904A1 (en) * | 2021-04-01 | 2022-10-06 | 上海正泰智能科技有限公司 | Quick tripping device and circuit breaker |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |