CN205039125U - If back up breaker - Google Patents

Abstract

The utility model provides an if back up breaker, belongs to the low -voltage electrical equipment field. It includes circuit breaker body, manually operation device, and the manually operation device includes base and knob, link gear, drive plate, and the circuit breaker body includes shell, sound contact and operating device, and operating device includes handle, pivot, handle and drive plate linkage, and the moving contact is installed in the pivot, characteristics include still that is ended a device, and this card ends the device and includes the ejector pin and restore to the throne the piece, the ejector pin have an effect end that is used for linking mutually with the pivot and one be used for with drive plate matched with backstop portion, when sound male contact closure, backstop portion is on the movement track of drive plate, when the separation of sound contact was opened, backstop portion was in outside the movement track of drive plate. Operational safety is high, and it is accurate that the card ends the location, low in manufacturing cost.

Description

A kind of breaker for device

Technical field

The utility model belongs to low voltage electrical apparatus technology field, is specifically related to a kind of breaker for device with isolation features.

Background technology

Breaker for device comprises hand-operating device and breaker body, and breaker body is breaker of plastic casing, and breaker of plastic casing comprises contact system, operating mechanism, trip gear and arc-control device; Contact system comprises dynamic/static contact, and operating mechanism comprises handle, elbow knot linkage etc.When breaker of plastic casing is as isolation appliance applications, handle need be pushed into disjunction indicating positions, shows that breaker of plastic casing is in isolation.Be in the breaker of plastic casing of on-state in circuit, if occur abnormal, as contact melting welding fault, then forbid handle to be pushed into disjunction position.Under above-mentioned fault condition, if handle can also be pushed into disjunction position, then operating personnel thinks that circuit disconnects and safety by mistake, as usual carries out maintenance activity, and in fact circuit dangerous, therefore easily there is electric shock accidents.In prior art, as Chinese invention patent Authorization Notice No. CN100336149C discloses one " low-voltage circuit breaker and corresponding forced opening & operating apparatus ", handle is prevented to be pushed into the device of disjunction indicating positions after being specifically related to a kind of contact melting welding, this technical scheme is: the upper connecting rod tied in linkage by handle and elbow is contacted the locking effect realized to handle motion after melting welding, thus stops handle to arrive disjunction indicating positions.So, above short transverse, hand-operating device be installed when breaker of plastic casing and form a complete breaker for device, and Shortcomings after technique scheme is applied to this breaker for device: because hand-operating device and the interlock of breaker of plastic casing are that higher pair manually between operating means and the handle of breaker of plastic casing is connected and realizes, unavoidably there is fit clearance, simultaneously, due to comparatively complicated to driving-chain relation between the knob of hand-operating device from dynamic/static contact, the knob operation precision attenuation amplitude of hand-operating device is large, requirements at the higher level are proposed to craft precision, processing cost is caused sharply to raise, if keep original processing and manufacturing level, the then knob position precise decreasing of hand-operating device, when after contact melting welding, although the handle of breaker body possesses higher locking position precision, but its locking position precision is with regard to deep fades after being delivered to the knob of hand-operating device, thus instruction by mistake is easily caused, give and safeguard, the personnel of the operation process such as maintenance bring potential safety hazard.

Summary of the invention

The purpose of this utility model to provide a kind of breaker for device, and its processing safety is high, effectively can prevent the personal safety accident caused to the personnel of the operation process such as maintenance, maintenance due to the mistake instruction of hand-operating device rotary handle.

The purpose of this utility model reaches like this, a kind of breaker for device, comprise breaker body, be arranged on hand-operating device above breaker body short transverse, described hand-operating device comprises pedestal and is arranged on knob, link gear, the drive plate on pedestal, described breaker body comprises shell, the moving contact be arranged on shell, fixed contact and operating mechanism, described operating mechanism comprises handle, rotating shaft, it is outer and link with the drive plate of hand-operating device that handle stretches out shell, and moving contact is arranged in rotating shaft; It is characterized in that, described breaker for device also comprises a clamping device, this clamping device comprises a push rod and for providing the return unit of restoring force for push rod, described push rod has the stopper section of effect end and for matching with drive plate for being connected with rotating shaft, when moving contact, fixed contact contact close, support end pushing effect end in rotating shaft, make push rod overcome the effect of return unit, the movement locus that the stopper section on it is in drive plate is coordinated by contact and stops the rotation of described drive plate; When moving contact, fixed contact are separated and open, return unit acts on push rod, makes the disengaging of the stopper section on it coordinate with the contact of described drive plate and be in outside the movement locus of described drive plate.

In a specific embodiment of the present utility model, described push rod also comprises the body of rod, limiting platform, and described limiting platform is convexly equipped with guide; Described pedestal is provided with guide ledges; Described return unit is Compress Spring, and its one end is resisted against on guide, and the other end is resisted against in guide ledges; Described shell comprises upper cover, middle cover, on cover and offer the first pilot hole, in cover and offer the second pilot hole, the described body of rod is located on the first pilot hole and the second pilot hole and realizes guiding to push rod, and it is spacing that described limiting platform matches with the upper surface of described upper cover and realizes push rod.

The utility model owing to adopting after said structure, the beneficial effect had: ensure the processing safety with isolation features electrical equipment; After there is melting welding connection in dynamic and static contact, realize the motion locking effect to hand-operating device rotary handle by the direct-drive annexation of rotating shaft and hand-operating device, overcome in conventional solution and cause the too high drawback of locking positioning accuracy request because driving-chain is long; Hand-operating device rotary handle can be stoped to arrive open position, effectively prevent the electric shock accidents caused to the personnel of the operation process such as maintenance, maintenance due to the mistake instruction of hand-operating device rotary handle; Locking registration, requirement on machining accuracy is low, thus can reduce manufacturing cost.

Accompanying drawing explanation

Fig. 1 is the overall structure figure of the utility model breaker for device.

Fig. 2 is the three-dimensional exploded view of the utility model breaker for device.

Fig. 3 is the plane cut-away view of the utility model breaker for device.

Fig. 4 is the stereochemical structure sketch of the utility model breaker for device at gate-dividing state.

The planar side diagram that Fig. 5 is state shown in Fig. 4.

Fig. 6 is the stereochemical structure sketch of the utility model breaker for device in "on" position.

The planar side diagram that Fig. 7 is state shown in Fig. 6.

Fig. 8 is the stereochemical structure sketch of the utility model breaker for device first embodiment in melting welding state.

The planar side diagram that Fig. 9 is state shown in Fig. 8.

Figure 10 is the stereochemical structure sketch of the utility model breaker for device second embodiment in melting welding state.

In figure: 1. breaker body, 11. shells, 111. upper covers, 112. middle covers, 113. first pilot holes, 114. second pilot holes, 115. upper surfaces, 12. moving contacts, 121. moving contacts, 13. fixed contacts, 131. fixed contacts, 14. handles, 15. rotating shafts, 151. support ends; 2. hand-operating device, 20. knobs, 21. drive plates, 211. plates, 212. gears prominent, 22. pedestals, 221. guide ledges, 23. link gears, 231. rotary bodies, 232. plate bodys, 233. holes, 24. disks, 241. first disks, 242. second disks, 25. pivot pins, 26. pivots; 3. push rod, 31. effect ends, 32. stopper sections, 33. bodies of rod, 34. limiting platforms, 35. guides; 4. return unit.

Embodiment

Applicant will be described 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, the utility model relates to a kind of breaker for device, and it comprises breaker body 1, be arranged on hand-operating device 2 above breaker body 1 short transverse.

Refer to Fig. 2, Fig. 3, Fig. 4 and Fig. 5, described breaker body 1 is breaker of plastic casing, it comprises shell 11, the moving contact 12 be arranged on shell 11, fixed contact 13, operating mechanism, arc-control device and release (arc-control device and release are known technology, not shown).

Described operating mechanism comprises handle 14, the lever of installing handle 14, elbow knot connecting rod, main spring, the rotating shaft 15 of installing moving contact, tripping, snap close, the draw bar linked with release and the mechanism rack for supporting above-mentioned component; The bottom of lever is installed on mechanism rack, makes handle capable of being be that the centre of gyration makes rotary oscillation with block chalaza; Elbow knot connecting rod comprises the upper connecting rod and lower link that are hinged, the upper end of elbow knot connecting rod namely go up the upper end of connecting rod and tripping hinged, elbow ties the lower end of connecting rod and the lower end of lower link is hinged in rotating shaft 15; Tripping, snap close, draw bar are hinged on mechanism rack respectively; Main spring is used for providing operating energy, and its one end is hung on the top of lever, and the other end is hung on the elbow knot upper connecting rod of connecting rod and the jointed shaft of lower link.The structure of operating mechanism is known technology, therefore not shown.It is outer and link with the drive plate 21 of hand-operating device 2 that handle 14 stretches out shell 11, and moving contact 12 is arranged in rotating shaft 15, provides pretightning force by touch spring.

When circuit breaker is when the combined floodgate of normal work, snap close and draw bar hasp, tripping and snap close hasp, upper connecting rod, lower link, rotating shaft 15 forms stable quadric chain, driving handle 14, main spring is driven to press to connecting rod, in main spring course of action, main spring extends and storage power gradually, this process quadric chain keeps relative static conditions, when main spring presses through upper connecting rod position, quadric chain starts action under main spring and touch spring effect, be specially: upper connecting rod rotates under the effect of main spring pulling force, upper connecting rod drives lower link action, lower link drive rotating shaft 15 around the shaft centre of gyration O1 is rotated, moving contact 121 on moving contact 12 is separated with the fixed contact 131 on fixed contact 13, final arrival gate-dividing state, handle 14 points to open position.In above process, after handle 14 drives main spring substantially to press through connecting rod position, moving contact 121, fixed contact 131 start to be separated, and this position is called the separating brake operating position of handle 14.

Hand-operating device 2 comprises pedestal 22 and is arranged on the knob 20 on pedestal 22, link gear 23, drive plate 21, the plate body 232 that link gear 23 comprises rotary body 231 and fixes with rotary body 231, plate body 232 offers porose 233, drive plate 21 is provided with pivot pin 25, in pivot pin 25 probe hole 233 and both can relative motion, knob 20 is fixed with rotary body 231, the rotation of knob 20 drives plate body 232 synchronous axial system, wall portion driving shaft pin 25 action of plate body 232 passing hole 233, thus drive drive plate 21 to rotate around the pivot 26 be fixed on pedestal 22, the bottom of drive plate 21 is fixed with two disks 24, be respectively the first disk 241, second disk 242, the handle 14 of breaker body 1 probes into the first disk 241, in gap between second disk 242, the higher pair formed between hand-operating device 2 and the handle 14 of breaker body 1 is connected thus, drive plate 21 is driven pivotally 26 to rotate after turning knob 20, thus stir respectively by the first disk 241 separating brake that handle 14 completes breaker body 1, detain operation again, the closing operation that handle 14 completes breaker body 1 is stirred by the second disk 242.Also can not fixed disc 24 on drive plate 21, perforate on drive plate 21, in handle 14 probe hole, wall portion driving handle 14 action of passing hole.Drive plate 21 is in the whole course of work, and the above-mentioned separating brake operating position of corresponding handle 14 also has a separating brake operating position.

Breaker for device of the present utility model also comprises a clamping device, this clamping device comprises a push rod 3 and for providing the return unit 4 of restoring force for push rod 3, described push rod 3 has one for the effect end 31, that is connected with rotating shaft 15 for stopper section 32, body of rod 33 that matches with drive plate 21 and a limiting platform 34, and described limiting platform 34 is convexly equipped with guide 35; The pedestal 22 of described hand-operating device 2 is provided with guide ledges 221; Described return unit 4 preferably adopts Compress Spring, and its one end is resisted against on guide 35, and the other end is resisted against in guide ledges 221; Described shell 11 comprises upper cover 111, middle cover 112 and base, upper cover 111 offers the first pilot hole 113, middle cover 112 offers the second pilot hole 114, the described body of rod 33 is located on the first pilot hole 113 and the second pilot hole 114 and realizes guiding to push rod 3, and it is spacing that described limiting platform 34 matches with the upper surface 115 of described upper cover 111 and realizes push rod 3.Rotating shaft 15 is provided with to the passive support end 151 of push rod 3, support end 151 is distributed in the both sides of rotating shaft centre of gyration O1 with the moving contact 121 on moving contact 12.When moving contact 12, fixed contact 13 contact closed, support end 151 pushing effect end 31 in rotating shaft 15, make push rod 3 overcome the effect of return unit 4, the movement locus that the stopper section 32 on it is in drive plate 21 is coordinated by contact and stops the rotation of described drive plate 21; When moving contact 12, fixed contact 13 are separated and open, return unit 4 acts on push rod 3, makes the disengaging of the stopper section 32 on it coordinate with the contact of described drive plate 21 and be in outside the movement locus of described drive plate 21.

Please continue to refer to Fig. 4, Fig. 5, the moving contact 12 of breaker body 1, fixed contact 13 are in released state, the motion of drive plate 21 is not interfered in stopper section 32, now, stirs knob 20, drive plate 21 is driven to rotate clockwise in Fig. 4 position by link gear 23, pivot pin 25, second disk 242 stirs forward handle 14 in Fig. 5 position, when drive plate 21 crosses stopper section 32, and band fixed handle 14, and then drive main spring, provide combined floodgate power by the upper connecting rod of elbow knot connecting rod.Thus, by operating mechanism drive rotating shaft 15 around the shaft centre of gyration O1 rotate counterclockwise, moving contact 12, fixed contact 13 are closed, and drive plate 21 arrives Fig. 6 position from Fig. 4 position, completes closing operation.In the process, support end 151 rotates counterclockwise, and Fig. 5 position rises, namely move to the direction near handle 14, pushing effect end 31, makes push rod 3 overcome the effect upwards lifting of return unit 4, stopper section 32 is on the movement locus of drive plate 21, as Fig. 6, Fig. 7.

Please continue to refer to Fig. 6, Fig. 7, the moving contact 12 of breaker body 1, fixed contact 13 closes, although now stopper section 32 is on the movement locus of drive plate 21, but owing to there is certain distance L between drive plate 21 and stopper section 32, now stir knob 20, link gear 23 is driven to rotate counterclockwise in Fig. 6 position, first disk 241 driving handle 14 moves to open position, when drive plate 21 near stopper section 32 and both be about to contact before, drive plate 21 arrives separating brake operating position, now, the upper connecting rod of elbow knot connecting rod crossed by main spring, separating brake power is provided, in main spring pulling force and the effect of touch spring counter-force, lower link drives rotating shaft 15 to start centre of gyration O1 around the shaft and rotates, moving contact 121, fixed contact 131 starts to be separated, as Fig. 8, shown in Fig. 9, under spring force, lower link drives rotating shaft 15 Quick winding rotating shaft centre of gyration O1 to rotate, moving contact 121, fixed contact 131 quick separating, support end 151 rotates clockwise, from Fig. 7 position transition to Fig. 5 position, namely move to the direction away from handle 14, release action end 31, push rod 3 is moved down under the effect of return unit 4, until limiting platform 34 contact with the upper surface 115 of upper cover 111 and realize push rod 3 spacing, the movement locus of drive plate 21 is left in the stopper section 32 of push rod 3, as Fig. 4, shown in Fig. 5, thus, drive plate 21 can not arrive open position by the restriction of stopper section 32, knob 20, handle 14 all arrives open position, complete sub-switching operation.

Preferably, the gear that drive plate 21 of the present utility model comprises plate 211 and downward projection is formed on plate 211 prominent 212, as Fig. 5 to Fig. 9, when moving contact 12, fixed contact 13 contact closed, support end 151 pushing effect end 31 in rotating shaft 15, make push rod 3 overcome the effect of return unit 4, stopper section 32 is on the movement locus of gear prominent 212; When moving contact 12, fixed contact 13 are separated and open, return unit 4 acts on push rod 3, and stopper section 32 is in outside the movement locus of gear prominent 212.Certain drive plate of the present utility model 21 also can be only made up of plate 211, gear prominent 212 is not set, as shown in Figure 10 embodiment, stopper section 32 and plate 211 mating reaction, when moving contact 12, fixed contact 13 contact closed, support end 151 pushing effect end 31 in rotating shaft 15, make push rod 3 overcome the effect of return unit 4, stopper section 32 is on the movement locus of plate 211; When moving contact 12, fixed contact 13 are separated and open, return unit 4 acts on push rod 3, and stopper section 32 is in outside the movement locus of plate 211.

When dynamic, after fixed contact generation melting welding connects, as Fig. 8, Fig. 9, shown in Figure 10, because support end 151 is to the pushing of effect end 31, the gear that stopper section 32 is in drive plate 21 dash forward 212 or plate 211 movement locus on, stopper section 32 prevents being rotated further of drive plate 21, thus, handle 14 cannot continue action and put in place, and drive plate 21 cannot continue action to put in place, thus, the knob 20 linked by link gear 23 and drive plate 21 also cannot be continued action and put in place, thus can not open position be indicated, thus ensure that the processing safety with isolation features electrical equipment.

Claims (2)

1. a kind of breaker for device, comprise breaker body (1), be arranged on the hand-operating device (2) above breaker body (1) short transverse, described hand-operating device (2) comprises pedestal (22) and is arranged on the knob (20) on pedestal (22), link gear (23), drive plate (21), described breaker body (1) comprises shell (11), be arranged on the moving contact (12) on shell (11), fixed contact (13) and operating mechanism, described operating mechanism comprises handle (14), rotating shaft (15), handle (14) stretches out shell (11) and link with the drive plate (21) of hand-operating device (2) outward, moving contact (12) is arranged in rotating shaft (15), it is characterized in that, described breaker for device also comprises a clamping device, this clamping device comprises a push rod (3) and for providing the return unit (4) of restoring force for push rod (3), described push rod (3) has the stopper section (32) of effect end (31) and for matching with drive plate (21) for being connected with rotating shaft (15), when moving contact (12), when fixed contact (13) contact is closed, support end (151) pushing effect end (31) in rotating shaft (15), push rod (3) is made to overcome the effect of return unit (4), the movement locus that stopper section (32) on it is in drive plate (21) is coordinated by contact and stops the rotation of described drive plate (21), when moving contact (12), fixed contact (13) are separated and open, return unit (4) acts on push rod (3), makes the stopper section on it (32) disengaging coordinate with the contact of described drive plate (21) and be in outside the movement locus of described drive plate (21).

2. a kind of breaker for device according to claim 1, it is characterized in that described push rod (3) also comprises the body of rod (33), limiting platform (34), described limiting platform (34) is convexly equipped with guide (35); Described pedestal (22) is provided with guide ledges (221); Described return unit (4) is Compress Spring, and its one end is resisted against on guide (35), and the other end is resisted against in guide ledges (221); Described shell (11) comprises upper cover (111), middle cover (112), upper cover (111) offers the first pilot hole (113), middle cover (112) offers the second pilot hole (114), the described body of rod (33) is located in the upper and guiding that realizes push rod (3) of the first pilot hole (113) and the second pilot hole (114), and it is spacing that described limiting platform (34) matches with the upper surface (115) of described upper cover (111) and realizes push rod (3).