Circuit breaker linkage component and isolation circuit breaker

Abstract

The utility model provides a circuit breaker linkage part and an isolation circuit breaker, belonging to the technical field of electrical fittings, the circuit breaker linkage part comprises a first main shaft and a pull rod, the first main shaft is provided with a linkage member, the linkage member comprises cams located at two sides of the pull rod, the cams and the first main shaft rotate synchronously, the cams are provided with linkage grooves, and the linkage grooves are provided with linkage grooves. A pin shaft is arranged on the pull rod, the two ends of the pin shaft penetrate through the linkage grooves in the two sides, linkage wheels are arranged on the pin shaft corresponding to the linkage grooves, limiting nuts are arranged on the pin shaft corresponding to the outer sides of the two cams, locking nuts are arranged on the outer sides of the limiting nuts, and first threads and second threads are arranged on the pin shaft corresponding to the limiting nuts and the locking nuts respectively; the thread directions of the first thread and the second thread are opposite. The first thread and the second thread which are opposite in thread direction are arranged on the pin shaft and matched with the limiting nut and the locking nut, transmission failure caused by loosening and falling of the nut on the pin shaft is prevented, and stability, reliability and safety of a linkage component are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of electrical fittings, and particularly relates to a circuit breaker linkage component and an isolation circuit breaker. BACKGROUND

[0002] The isolation circuit breaker is an electrical device integrating isolation and circuit breaking functions, and is widely used in power systems due to its integrated functions, excellent performance and technical characteristics meeting the trend of the times. When in the closed state, the moving contact and the isolation static contact of the isolation circuit breaker are in close contact, and the current can pass through smoothly, forming a circuit path. When the circuit is opened, the moving contact and the isolation static contact are separated, and the isolation breaking point is pulled apart by a sufficient distance to ensure that the circuit is reliably cut off, forming an obvious breaking point to prevent accidental current passing through. Therefore, the isolation circuit breaker can control the on-off of the circuit under normal and fault conditions, and at the same time, it can provide a visible isolation breaking point to ensure the safety of maintenance personnel.

[0003] At present, the linkage component is usually used to transmit power to the arc-extinguishing chamber contact system in the isolation circuit breaker. Specifically, a cam is arranged on the main shaft, a pin shaft is arranged on the pull rod, and a linkage wheel is arranged on the pin shaft. The cam is rotated to drive the pin shaft and the pull rod to move, and then power is transmitted to the arc-extinguishing chamber contact system to realize the arc-extinguishing function. However, due to the frequent rotation of the cam, the fasteners on the pin shaft are prone to loosening and falling off, resulting in transmission failure and affecting the stability, reliability and safety of the linkage component. SUMMARY

[0004] The utility model aims at overcoming the shortcomings and deficiencies of the prior art and provides a circuit breaker linkage component and an isolation circuit breaker.

[0005] The utility model adopts the technical scheme as follows: in the first aspect, the utility model provides a circuit breaker linkage component, including first spindle and pull rod, be provided with linkage piece on the first spindle, the linkage piece includes the cam in the both sides of pull rod, the cam with first spindle synchronous rotation, be provided with linkage groove on the cam, be provided with pin shaft on the pull rod and the both ends of pin shaft pass through the both sides of linkage groove, be provided with linkage wheel on the pin shaft and correspond to linkage groove, the both sides of pin shaft are provided with limit nut and correspond to two cams, the limit nut is used for limiting the axial movement of pin shaft, the outside of limit nut is provided with locking nut, the first screw thread and the second screw thread are respectively provided with the first screw thread and the second screw thread on the pin shaft and correspond to limit nut and locking nut, the screw thread direction of first screw thread and second screw thread is opposite.

[0006] The side of limit nut close to cam is provided with gasket, the gasket is integrally or separately provided with limit nut, and the gasket abuts against the edge of linkage groove.

[0007] The outer diameter of the limiting nut is smaller than the width of the linkage groove, and the outer diameter of the gasket is greater than the width of the linkage groove.

[0008] The circuit breaker linkage component further comprises an arc-extinguishing chamber support, a vacuum arc-extinguishing chamber is arranged in the arc-extinguishing chamber support, a connecting seat is connected to one end of the arc-extinguishing chamber support close to the pull rod, the connecting seat is sleeved on the outer side of the first main shaft and abuts between the two cams away from the arc-extinguishing chamber support, a guide plate is arranged on the connecting seat, a first guide groove is arranged on the guide plate, a second guide groove is arranged on the lower end of the pull rod, the guide plate is slidingly arranged in the second guide groove, and the pin shaft passes through the first guide groove.

[0009] In the second aspect, the application further provides an isolating circuit breaker, which comprises the circuit breaker linkage component and further comprises a spring, a convex plate part is arranged on the pull rod, and the spring abuts between the convex plate part and the vacuum arc-extinguishing chamber and is sleeved on the pull rod.

[0010] The isolating circuit breaker further comprises a support, the arc-extinguishing chamber support is connected to the support, a disconnecting switch assembly and an isolating cross frame are sequentially arranged above the arc-extinguishing chamber support, the disconnecting switch assembly comprises a disconnecting main shaft and a blade, the disconnecting main shaft is rotationally arranged on the support, the blade is arranged in the disconnecting main shaft, and the isolating cross frame is provided with an isolating static contact located on a rotating track of the blade.

[0011] One end of the isolating static contact away from the disconnecting switch assembly is provided with a limiting part, and the other end is provided with a first guide surface.

[0012] The isolating circuit breaker further comprises a mounting seat, the blade is rotationally arranged at one end of the mounting seat, and the other end of the mounting seat is electrically connected with a static end conducting rod of the vacuum arc-extinguishing chamber.

[0013] The support is provided with a grounding cross frame, and the grounding cross frame is provided with a grounding static contact located on a rotating track of the blade.

[0014] One end of the grounding static contact close to the disconnecting switch assembly is provided with a second guide surface.

[0015] The circuit breaker linkage component has the following beneficial effects:

[0016] 1. The first thread, the second thread, the limiting nut and the locking nut arranged on the pin shaft in opposite directions are matched, so that transmission failure caused by loosening and falling of the nuts on the pin shaft is prevented, and the stability, reliability and safety of the linkage component are improved.

[0017] 2. The first guide groove and the guide plate are arranged, so that the stability of transmission of the circuit breaker linkage component is improved.

[0018] 3. The utility model discloses a gasket is provided with, avoid the linkage wheel lateral wall is limited by the nut abrasion, and can reduce the volume of the limited nut, locking nut used, has saved the cost.

[0019] 4. The utility model discloses simple structure, stable and reliable performance and convenient assembly. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to make the technical scheme of the embodiments of the present utility model or the prior art clearer, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description, obviously, the drawings in the following description are only some embodiments of the present utility model, and for those skilled in the art, other drawings obtained according to these drawings without creative labor still belong to the scope of the present utility model.

[0021] Figure 1 It is a schematic view of the present utility model;

[0022] Figure 2 It is another schematic view of the present utility model;

[0023] Figure 3 It is Figure 1 It is an enlarged view of A in the middle;

[0024] Figure 4 It is Figure 1 It is an enlarged view of B in the middle;

[0025] Figure 5 It is a schematic view of the grounding cross frame of the present utility model. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantages of the present utility model clearer, the following will make further detailed description to the present utility model by combining with the drawings.

[0027] It should be noted that all the expressions of "first" and "second" in the embodiments of the present utility model are used to distinguish two same name different entities or different parameters, and "first" and "second" are only used for convenient expression, and should not be understood as the limitation of the embodiments of the present utility model, and the subsequent embodiments will not be described one by one.

[0028] The direction and position terms mentioned in the present utility model, such as "up", "down", "front", "back", "left", "right", "inside", "outside", "top", "bottom", "side" and the like, are only the direction or position of the drawings. Therefore, the direction and position terms are used to explain and understand the present utility model, and are not limited to the protection scope of the present utility model.

[0029] Embodiment one:

[0030] AsFigures 1 to 5 As shown in the figure, the utility model provides an embodiment:

[0031] A circuit breaker linkage component, including first spindle 1 and pull rod 2, be provided with linkage 3 on first spindle 1, linkage 3 includes the cam 31 located in the both sides of pull rod 2, cam 31 rotates with first spindle 1, linkage groove 311 is provided on cam 31, pin shaft 21 is provided on pull rod 2 and the both ends of pin shaft 21 pass through the both sides linkage groove 311, linkage wheel 22 is provided on pin shaft 21 corresponding linkage groove 311, limiting nut 4 is provided on the outside of pin shaft 21 corresponding two cams 31, limiting nut 4 is used to limit the axial movement of pin shaft 21, locking nut 5 is provided on the outside of limiting nut 4, first thread and second thread are provided on pin shaft 21 corresponding limiting nut 4 and locking nut 5 respectively, and the thread direction of first thread and second thread is opposite. Even if cam 31 frequently rotates, by setting first thread and second thread with opposite thread direction respectively connecting limiting nut 4 and locking nut 5, avoid the transmission failure caused by the nut loosening, falling off on pin shaft 21, and it is favorable for the stable operation of circuit breaker linkage component.

[0032] The side of limiting nut 4 close to cam 31 is provided with gasket 6, gasket 6 is integrally or separately provided with limiting nut 4, and gasket 6 abuts with the edge of linkage groove 311. The stability of limiting nut 4 connection is improved, and the pressure can be dispersed to avoid the wear of linkage wheel 22 sidewall by limiting nut 4. Moreover, the outer diameter of limiting nut 4 is less than the width of linkage groove 311, and the outer diameter of gasket 6 is greater than the width of linkage groove 311, which reduces the volume of limiting nut 4 and locking nut 5 used, and saves the cost.

[0033] Moreover, arc-extinguishing chamber support 7 is also provided, and vacuum arc-extinguishing chamber 71 is arranged in arc-extinguishing chamber support 7. It should be understood that vacuum arc-extinguishing chamber 71 adopts a common vacuum arc-extinguishing chamber in the technical field, which generally includes a shell, a moving end conductive rod, a static end conductive rod, a moving contact and a static contact.

[0034] The end of arc-extinguishing chamber support 7 close to pull rod 2 is connected with connecting seat 72, the end of connecting seat 72 away from arc-extinguishing chamber support 7 is sleeved on first spindle 1 and abuts between two cams 31, guide plate 721 is arranged on connecting seat 72, first guide groove 7211 is arranged on guide plate 721, second guide groove 23 is arranged on the lower end of pull rod 2, guide plate 721 is slidingly arranged in second guide groove 23, pin shaft 21 passes through first guide groove 7211, and the stability of pull rod 2 transmission process is improved.

[0035] The embodiment also provides the isolating circuit breaker, which comprises the circuit breaker linkage component and a spring 8, a lug plate part 24 is arranged on the pull rod 2, the spring 8 is abutted between the lug plate part 24 and the vacuum arc-extinguishing chamber 71 and is sleeved on the pull rod 2. When the first main shaft 1 rotates synchronously with the cam 31, the linkage wheel 22 can drive the pull rod 2 to move, and then drive the movable end conducting rod in the vacuum arc-extinguishing chamber 71 to move. The spring 8 is arranged to improve the reset speed of the pull rod 2.

[0036] The isolating circuit breaker is also provided with a support 9, the arc-extinguishing chamber support 7 is connected to the support 9, the arc-extinguishing chamber support 7 is connected to the support 9, the support 9 is provided with an isolating switch assembly 10 and an isolating cross frame 20 above the arc-extinguishing chamber support 7 in sequence, the isolating switch assembly 10 comprises an isolating main shaft 101 and a contact blade 102, the isolating main shaft 101 is rotationally arranged on the support 9, the contact blade 102 is arranged in the isolating main shaft 101, and the isolating cross frame 20 is provided with an isolating static contact 201 located on a rotating track of the contact blade 102.

[0037] The isolating static contact 201 is provided with a limiting part 2011 at one end away from the isolating switch assembly 10 and a first guide surface 2012 at the other end. The limiting part 2011 is arranged to avoid the contact blade 102 from rotating too much, and the first guide surface 2012 can guide the contact blade 102 to abut against the isolating static contact 201 smoothly when the contact blade 102 rotates.

[0038] The isolating circuit breaker also comprises a mounting seat 30, the contact blade 102 is rotationally arranged at one end of the mounting seat 30, and the other end of the mounting seat 30 is electrically connected with a static end conducting rod of the vacuum arc-extinguishing chamber.

[0039] The support 9 is provided with a grounding cross frame 91, the grounding cross frame 91 is provided with a grounding static contact 911 located on a rotating track of the contact blade 102. The grounding static contact 911 is provided with a second guide surface 9111 at one end close to the isolating switch assembly 10. The contact blade 102 is connected with the grounding static contact 911, so that the current can be guided to the ground. The second guide surface 9111 is arranged on the grounding static contact 911 to guide the contact blade 102, so that the contact blade 102 can be more smoothly connected with the grounding static contact 911.

[0040] The above only discloses preferred embodiments of the utility model, and of course cannot limit the utility model right scope, therefore equivalent changes made according to the utility model right claim still belong to the utility model scope.

Claims

1. A circuit breaker linkage component, comprising a first main shaft (1) and a pull rod (2), a linkage (3) is arranged on the first main shaft (1), the linkage (3) comprises a cam (31) arranged on both sides of the pull rod (2), the cam (31) rotates synchronously with the first main shaft (1), the cam (31) is provided with a linkage groove (311), the pull rod (2) is provided with a pin shaft (21), and both ends of the pin shaft (21) pass through the linkage grooves (311) on both sides, the pin shaft (21) is provided with a linkage wheel (22) corresponding to the linkage grooves (311), characterized in that, The outer side of the pin shaft (21) corresponding to the two cams (31) is provided with a limiting nut (4), the limiting nut (4) is used for limiting the axial movement of the pin shaft (21), the outer side of the limiting nut (4) is provided with a locking nut (5), the pin shaft (21) corresponding to the limiting nut (4) and the locking nut (5) is respectively provided with a first thread and a second thread, and the thread directions of the first thread and the second thread are opposite.

2. The circuit breaker linkage assembly of claim 1, wherein, The side of the limiting nut (4) close to the cam (31) is provided with a gasket (6), the gasket (6) is integrally or separately provided with the limiting nut (4), and the gasket (6) is in abutment with the edge of the linkage groove (311).

3. The circuit breaker linkage assembly of claim 2, wherein: The outer diameter of the limiting nut (4) is smaller than the width of the linkage groove (311), and the outer diameter of the gasket (6) is greater than the width of the linkage groove (311).

4. The circuit breaker linkage assembly of claim 3, wherein: Further comprising an arc-extinguishing chamber support (7), the arc-extinguishing chamber support (7) is provided with a vacuum arc-extinguishing chamber (71) inside, the arc-extinguishing chamber support (7) is connected with a connecting seat (72) close to one end of the pull rod (2), the end of the connecting seat (72) away from the arc-extinguishing chamber support (7) is sleeved on the outer side of the first main shaft (1) and abuts between the two cams (31), the connecting seat (72) is provided with a guide plate (721), the guide plate (721) is provided with a first guide groove (7211), the lower end of the pull rod (2) is provided with a second guide groove (23), the guide plate (721) is slidingly arranged in the second guide groove (23), and the pin shaft (21) passes through the first guide groove (7211).

5. An isolated circuit breaker comprising a circuit breaker linkage according to any one of claims 1 to 4, characterized in that Further comprising a spring (8), the pull rod (2) is provided with a lug plate portion (24), the spring (8) is in abutment between the lug plate portion (24) and the vacuum arc-extinguishing chamber (71) and is sleeved on the pull rod (2).

6. The isolating circuit breaker of claim 5, wherein, Further comprising a support (9), the arc-extinguishing chamber support (7) is connected to the support (9), the support (9) is provided with an isolation switch assembly (10) and an isolation cross frame (20) above the arc-extinguishing chamber support (7) in sequence, the isolation switch assembly (10) comprises an isolation main shaft (101) and a blade (102), the isolation main shaft (101) is rotationally arranged on the support (9), the blade (102) is arranged in the isolation main shaft (101), and the isolation cross frame (20) is provided with an isolation static contact (201) located on a rotating track of the blade (102).

7. The isolating circuit breaker of claim 6, wherein, The end of the isolation static contact (201) away from the isolation switch assembly (10) is provided with a limiting portion (2011), and the other end is provided with a first guide surface (2012).

8. The isolating circuit breaker of claim 7, wherein, Further comprising a mounting seat (30), the blade (102) is rotationally arranged at one end of the mounting seat (30), and the other end of the mounting seat (30) is electrically connected with a static end conducting rod of the vacuum arc-extinguishing chamber.

9. The isolating circuit breaker of claim 8, wherein, The support (9) is provided with a grounding cross frame (91), and the grounding cross frame (91) is provided with a grounding static contact (911) located on a rotating track of the blade (102).

10. The isolating circuit breaker of claim 9, wherein, The end of the grounding static contact (911) close to the isolation switch assembly (10) is provided with a second guide surface (9111).

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